US20030173458A1 - Avionic door lock system - Google Patents
Avionic door lock system Download PDFInfo
- Publication number
- US20030173458A1 US20030173458A1 US10/100,227 US10022702A US2003173458A1 US 20030173458 A1 US20030173458 A1 US 20030173458A1 US 10022702 A US10022702 A US 10022702A US 2003173458 A1 US2003173458 A1 US 2003173458A1
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- US
- United States
- Prior art keywords
- cockpit
- controller
- lock
- door
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
- B64C1/1407—Doors; surrounding frames
- B64C1/1469—Doors between cockpit and cabin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
- B64D45/0015—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems
- B64D45/0021—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems means for restricting access to flight deck
- B64D45/0028—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems means for restricting access to flight deck doors or door arrangements specially adapted to restrict unauthorized access
- B64D45/0029—Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems means for restricting access to flight deck doors or door arrangements specially adapted to restrict unauthorized access electrically actuated
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
- G07C9/00674—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons
- G07C9/0069—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons actuated in a predetermined sequence
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/30—Individual registration on entry or exit not involving the use of a pass
- G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
- G07C9/33—Individual registration on entry or exit not involving the use of a pass in combination with an identity check by means of a password
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C2001/009—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like comprising decompression panels or valves for pressure equalisation in fuselages or floors
Definitions
- This invention relates to security systems, and more particularly to a security system adapted for use on a mobile platform such as an aircraft for preventing unauthorized entry onto the cockpit of an aircraft.
- a security system for use on a commercial aircraft which provides the pilot, co-pilot or other occupants of the cockpit a signal that entry into the cockpit is being requested.
- Such a system would ideally give the individuals in the cockpit an opportunity to make an assessment as to whether or not entry into the cockpit will be permitted either immediately, or whether entry should be denied.
- There is further a need for such a system which allows the pilot, co-pilot or other cockpit occupant to unlock the door separating the cockpit from the cabin area of the aircraft from a convenient location within the cockpit. Also required is the ability for the flight attendant to unlock the door after alerting the pilot and co-pilot for a pre-set time, in case the pilot and co-pilot are both incapacitated.
- the security system is particularly well adapted for use in mobile platforms such as, but not limited to, commercial aircraft.
- the security system operates to lock a door which separates a cockpit from a passenger cabin area and to allow occupants of the cockpit to receive signals indicating that a request for entry into the cockpit has been made by an individual in the passenger cabin area of the aircraft.
- the system further enables an occupant of the cockpit to provide a signal to the system allowing immediate unlocking of the cockpit door, or to deny the request to unlock the door.
- the security system preferably includes a pressure sensor.
- the pressure sensor causes the cockpit door to unlock when a difference in pressure between the cabin and cockpit is sensed.
- the system generally includes a user input device which is accessible by individuals in the cabin area.
- the input device comprises a keypad.
- a controller incorporating a chime is disposed in the cockpit.
- the logic system communicates with a control device positioned for convenient use by persons in the cockpit, as well as with a lock operably associated with the cockpit door.
- the control device comprises a multi position rotary switch.
- the multi position rotary switch provides three switch positions: an “AUTO” position, an “UNLOCK” position and a “DENY” position.
- An individual in the cabin area makes a request to gain entry to the cockpit by entering a predetermined access code into the keypad.
- the access code is a pre-programmed, restricted code that only individuals, such as flight attendants, would be apprised of in advance of entering the aircraft.
- the logic system When a correct access code is input to the keypad, the logic system generates an aural and visual annunciation within the cockpit apprising individuals in the cockpit that a request to enter the cockpit has been made.
- the switch is in the AUTO position, the occupants of the cockpit have a predetermined time period in which to decide either to unlock the cockpit door or to deny the request to enter. If a decision is made to allow entry, the occupants may leave the switch in the AUTO position, in which case the logic system will automatically unlock the lock associated with the cockpit door at the expiration of the predetermined time interval. If the occupants decide that entry should not be permitted, then the switch can be moved to the DENY position. This signals the logic system that the request to enter is being denied. The logic system will immediately disable the keypad and prevent further entry signals from being generated within the cockpit for a predetermined time thereafter.
- the switch to the UNLOCKED position sends a signal to the logic system that the lock to the cockpit door should be immediately unlocked.
- the logic system then sends a signal to a suitable device, such as a solenoid, that immediately unlocks the cockpit door.
- the UNLOCK position unlocks the door at any time and stops all ongoing visual and aural annunciations.
- the signal provided by the logic system is provided by a chime associated with a controller.
- the logic system also implements an intelligent series of time delays after a request for entry has been made at the keypad. When such a request has been made, the controller causes the chime to emit an audible signal to the occupants of the cockpit.
- the controller also simultaneously begins a first predetermined delay interval. If no action has been taken at the control device by any occupant of the cockpit at the expiration of the first predetermined delay interval, a second audible warning is provided by the chime and a second predetermined delay interval is commenced.
- the chime provides a continuous audible warning for a third predetermined time delay interval.
- the controller automatically sends a signal to the solenoid to unlock the lock to the cockpit door.
- a visual indicator also preferably flashes intermittently during the third delay interval further signaling that the cockpit door will be unlocked within a very short time if no action is taken. This operating scheme thus provides a short time period for the occupants of the cockpit to make an assessment as to whether the request for entry to the cockpit should be granted or denied.
- the door lock is automatically unlocked without intervention by the occupants of the cockpit provided the control device is in the AUTO position.
- the provision of both audible and visual signals virtually eliminates the possibility that the occupants of the cockpit will not realize that a request for entry has been made. It further allows automatic unlocking of the cockpit door unless an occupant of the cockpit intervenes through appropriate control of the switch.
- the keypad described above does not have the capability under any circumstances to unlock the door lock of the cockpit door.
- the lock is controlled strictly by signals received from the switch provided in the cockpit. Accordingly, no amount of tampering with the keypad, or even the destruction of the keypad, can result in unlocking of the cockpit door once it is locked. Unlocking can be accomplished only via the multi position switch.
- FIG. 1 is a simplified block diagram of a security system 10 in accordance with a preferred embodiment of the present invention.
- FIG. 2 is a timeline of the three time delay intervals implemented by the controller of the system after a request to unlock the cockpit door is received.
- FIG. 1 there is shown a security system 10 for controlling access into a control center of a mobile platform.
- the mobile platform will be referred to as a commercial aircraft and the control center will be referred to as the cockpit of the aircraft.
- the system 10 of the present invention is equally applicable to non-moving structures where it is desired to closely control access to a sensitive area of the structure. It is anticipated that the invention may also find applications on other mobile platforms such as ships or even buses.
- the system 10 advantageously includes only a limited number of independent component parts making it easily retrofitable to existing commercial or other types of aircraft.
- the system 10 generally includes a user input device in the form of a keypad 12 which is disposed in the passenger cabin area 13 a of an aircraft 13 , and in one preferred location on a door post assembly 15 a adjacent a door 15 of the aircraft 13 facing the passenger cabin area.
- the keypad 12 may be placed in virtually any location where it can be conveniently accessed by flight crew members who may need to gain periodic access to the cockpit 13 b of the aircraft 13 .
- the keypad 12 is in communication with a logic system 14 .
- the logic system 14 is in communication with a control device 16 , a circuit breaker 18 and a door lock solenoid 20 .
- An ambient air pressure sensor 22 disposed in a cockpit 13 b of the aircraft 13 communicates with the door lock solenoid 20 and the logic system 14 .
- the door lock solenoid 20 is operably associated with a door lock 26 for the cockpit door 15 , as will be described in greater detail momentarily.
- the logic system 14 comprises a suitable controller, and more preferably an 8-bit controller.
- the controller 14 includes a chime 24 which is used to generate an audible signal within the cockpit 13 b of the aircraft 13 .
- the control device 16 is also disposed in the cockpit 13 b and may be mounted on an overhead panel, in an aisle stand panel or at any other conveniently accessible location in the cockpit 13 b.
- control device 16 comprises a multi position rotary switch 28 having a first switch position 30 designated as the “AUTO” position, a second switch position designated the “UNLOCK” position and a third switch position 34 designated as the “DENY” position.
- the switch 28 comprises a manually engageable switch element 36 which is spring biased normally into the AUTO position.
- the switch element 36 can be moved momentarily into either the UNLOCK position or the DENY position. As soon as the switch element 36 is released, however, it is biased back to the AUTO position.
- An “UNLOCK” indicator light 38 is also disposed closely adjacent the switch 28 , as is a “LOCK FAILED” indicator light 40 .
- the UNLOCK indicator light 38 is illuminated when a predetermined access code has been correctly entered into the keypad 12 , as will be described in greater detail momentarily.
- the LOCK FAILED indicator light 40 indicates that the solenoid 20 has not unlocked the lock 26 of the cockpit door 15 .
- the keypad 12 comprises a plurality of numeric keys 42 and an enter key 42 a, a first indicator light 44 , a second indicator light 46 and a third indicator light 48 .
- the first indicator light 44 preferably comprises a red LED for indicating that the door lock 26 is in a locked condition.
- Second indicator light 46 preferably comprises an amber LED which is illuminated when a user inputs the predetermined access code correctly via the keys 42 and 42 a.
- Third indicator light 48 preferably comprises a green LED which signals that the solenoid 20 has unlocked the door lock 26 .
- the solenoid 20 includes a microswitch 50 for sensing the position of a plunger 20 a of the solenoid 20 . Accordingly, the controller 14 can verify that the plunger 20 a has been moved into the locked position when the solenoid 20 is energized. This provides an additional degree of security in the event the solenoid 20 fails and the plunger 20 a is not moved into the “LOCKED” position. In such instance, the LOCK FAILED indicator light 40 will be illuminated by the controller 14 to provide an immediate visual indication of such a condition to the occupants of the cockpit 13 b.
- the ambient air pressure sensor 22 is used to detect a drop in pressure in the cockpit 13 b when the cockpit door 15 is closed. Such a condition might occur, for example, if the windshield of the aircraft 13 was broken. In such a situation, it would be necessary to immediately unlock the cockpit door 15 to prevent complete decompression of the cockpit 13 b.
- the pressure sensor 22 is thus used to detect a drop in pressure within the cockpit 13 b and to immediately signal this event by deenergizing the solenoid 20 .
- “TO” represents the instant that a user correctly enters the predetermined access code via the keypad 12 .
- This code preferably comprises a three to eight digit numeric code. It is provided to flight attendants or other individuals, prior to entering the aircraft, who may have a need to periodically enter the cockpit 13 b while the aircraft 13 is in operation.
- the controller 14 Immediately after receiving the correct access code, the controller 14 causes the chime 24 to generate an audible signal represented by pulses 52 .
- Pulses 52 represent two “beeps” or other short duration audible signals which immediately apprises the individuals in the cockpit 13 b that a request for access to the cockpit has just been made.
- a first predetermined delay interval is commenced which extends in to “T1”.
- the controller 14 if the controller 14 has not received either in UNLOCK or a DENY command via the switch 28 (i.e., the switch 28 has not been moved to either of these positions), then the controller causes the chime 24 to again provide audible signals, represented by pulses 54 , to remind the occupants of the cockpit 13 b that someone is requesting access to the cockpit.
- T1 represents the expiration of the first delay interval and the beginning of a second delay interval.
- the controller 14 causes a third delay interval to be commenced.
- the controller 14 causes the UNLOCKED indicator light 38 to be continuously illuminated and the chime 24 is caused to output a continuous audible alert, represented by waveform 56 , that the lock 26 of the door 15 will be unlocked within a very short time period if no operator action is taken via the switch 28 .
- an occupant in the cockpit 13 b may move the switch element 36 of the switch 28 to the UNLOCK position 32 , which signals the controller 14 to turn off the chime 24 and the UNLOCKED indicator light 38 , as well as to command solenoid 20 to unlock the lock 26 .
- an occupant in the cockpit 13 b may move the switch element 36 to the DENY position 34 . This signals the controller 14 to turn off the chime 24 and the UNLOCKED indicator light 38 , and further inhibits operation of the keypad 12 for a predetermined time thereafter. This predetermined time may vary but is preferably for a time interval of between five minutes to thirty minutes.
- the controller 14 causes the solenoid 20 to be deenergized. This causes the door lock 26 to be unlocked. Thereafter, manual actuation of the door handle of the cockpit door 15 will allow the door to be opened.
- the delay interval between T0 and T3 is user programmable from about 15 seconds to about 120 seconds in 15 second increments.
- the delay interval between T2 and T3 has a minimum duration of at least 10 seconds.
- the audible signals represented by pulses 52 and 54 preferably comprise 0.5 second duration audible signals having a frequency of preferably around 500 Hz at approximately 75 dB. It will be appreciated, however, that the duration, frequency and intensity of these audible signals may be modified to suit user preferences.
- the UNLOCKED indicator light 38 when flashing during the third delay interval, preferably flashes at a 50% to 60% duty cycle, with 60% being the more preferred duty cycle. Again, however, the frequency at which this light flashes may be tailored to suit user preferences.
- the door is preferably maintained in the unlocked position for a predetermined time interval, and more preferably for at least about five seconds. Again, this delay interval could also be modified. During this time period the solenoid 20 remains deenergzied. After this short time interval expires, the controller 14 again automatically energizes the solenoid 20 to cause the lock 26 to lock the door 15 .
- the access code is preferably changeable from the controller 14 . This is accomplished by engaging a “PROGRAM” key 58 on the controller 14 as indicated in FIG. 1. Once this key is depressed, a new access code can be entered at the keypad 12 .
- a “door bell” mode This mode may be implemented by selecting a particular key, such as the “1” key on the keypad 12 , followed by the “ENTER” key 42 a. This causes the chime 24 to generate an audible signal but does not begin the time delay period represented between T0 and T3. In effect, the occupants of the cockpit 13 b are simply apprised that an individual in the cabin area 13 a of the aircraft 13 is requesting access to the cockpit.
- the audible signal may comprise one or more short duration signals by the chime 24 .
- the system 10 of the present invention thus provides a means by which individuals in the cabin area of the aircraft can request access to the cockpit, and can further initiate a process by which a locked cockpit door will be automatically unlocked if no intervention is taken by occupants of the cockpit.
- the inclusion of the pressure sensor also ensures that in the event of a decompression condition occurring in the cockpit, the cockpit door will be automatically and immediately unlocked so that the door can be quickly opened.
- the system 10 provides the occupants of the cockpit with the ultimate authority to deny the requested access if circumstances are such that the cockpit occupants believe that the cockpit should remain secure from all individuals in the cabin area.
Abstract
A security system adapted for use on an aircraft to prevent unauthorized access into a cockpit area of the aircraft via a cockpit door. The system includes a keypad accessible by individuals in a cabin area of the aircraft. A logic system is in communication with the keypad and also with a switch disposed inside the cockpit. Occupants of the cockpit, via the switch, have the ability to manually unlock the cockpit door, to deny the request for entry, or to do nothing, in which case the door will be automatically unlocked after the expiration of a predetermined time interval. No amount of tampering with the keypad or destruction of the keypad can unlock the cockpit door if the cockpit occupants decide to deny a request for entry via appropriate positioning of the switch. A pressure sensor in communication with the controller allows the door to be automatically unlocked in the event of a decompression condition occurring in the cockpit.
Description
- This invention relates to security systems, and more particularly to a security system adapted for use on a mobile platform such as an aircraft for preventing unauthorized entry onto the cockpit of an aircraft.
- At the present time there is an increasing need for controlling access to particular areas of mobile platforms. More specifically, there is an increasing need to control access to a cockpit of a commercial aircraft. Present day security systems often involve a simple lock or other system requiring the use of a key to unlock a door leading to a cockpit. However, such systems can be inconvenient for flight attendants who may need to periodically enter the cockpit area of an aircraft, such systems require a low force to open the door in case of decompression event.
- Present day systems for preventing unauthorized access to the cockpit of a commercial aircraft through the use of a key can be forced open, and also can be foiled by an intruder if the intruder should gain access to the key. Accordingly, there is a strong need for a security system for preventing unauthorized access into a cockpit of a commercial aircraft which does not suffer from the above-described limitations.
- More specifically, there is a need for a security system for use on a commercial aircraft which provides the pilot, co-pilot or other occupants of the cockpit a signal that entry into the cockpit is being requested. Such a system would ideally give the individuals in the cockpit an opportunity to make an assessment as to whether or not entry into the cockpit will be permitted either immediately, or whether entry should be denied. There is further a need for such a system which allows the pilot, co-pilot or other cockpit occupant to unlock the door separating the cockpit from the cabin area of the aircraft from a convenient location within the cockpit. Also required is the ability for the flight attendant to unlock the door after alerting the pilot and co-pilot for a pre-set time, in case the pilot and co-pilot are both incapacitated.
- The above and other objects are provided by a security system in accordance with a preferred embodiment of the present invention. The security system is particularly well adapted for use in mobile platforms such as, but not limited to, commercial aircraft. The security system operates to lock a door which separates a cockpit from a passenger cabin area and to allow occupants of the cockpit to receive signals indicating that a request for entry into the cockpit has been made by an individual in the passenger cabin area of the aircraft. The system further enables an occupant of the cockpit to provide a signal to the system allowing immediate unlocking of the cockpit door, or to deny the request to unlock the door.
- The security system preferably includes a pressure sensor. The pressure sensor causes the cockpit door to unlock when a difference in pressure between the cabin and cockpit is sensed.
- The system generally includes a user input device which is accessible by individuals in the cabin area. In one preferred form the input device comprises a keypad. A controller incorporating a chime is disposed in the cockpit. The logic system communicates with a control device positioned for convenient use by persons in the cockpit, as well as with a lock operably associated with the cockpit door. In one preferred form, the control device comprises a multi position rotary switch.
- In a preferred embodiment the multi position rotary switch provides three switch positions: an “AUTO” position, an “UNLOCK” position and a “DENY” position. An individual in the cabin area makes a request to gain entry to the cockpit by entering a predetermined access code into the keypad. It will be appreciated that the access code is a pre-programmed, restricted code that only individuals, such as flight attendants, would be apprised of in advance of entering the aircraft. When a correct access code is input to the keypad, the logic system generates an aural and visual annunciation within the cockpit apprising individuals in the cockpit that a request to enter the cockpit has been made. If the switch is in the AUTO position, the occupants of the cockpit have a predetermined time period in which to decide either to unlock the cockpit door or to deny the request to enter. If a decision is made to allow entry, the occupants may leave the switch in the AUTO position, in which case the logic system will automatically unlock the lock associated with the cockpit door at the expiration of the predetermined time interval. If the occupants decide that entry should not be permitted, then the switch can be moved to the DENY position. This signals the logic system that the request to enter is being denied. The logic system will immediately disable the keypad and prevent further entry signals from being generated within the cockpit for a predetermined time thereafter. If the occupants decide to grant immediate entry, then moving the switch to the UNLOCKED position sends a signal to the logic system that the lock to the cockpit door should be immediately unlocked. The logic system then sends a signal to a suitable device, such as a solenoid, that immediately unlocks the cockpit door. The UNLOCK position unlocks the door at any time and stops all ongoing visual and aural annunciations.
- In one preferred embodiment the signal provided by the logic system is provided by a chime associated with a controller. The logic system also implements an intelligent series of time delays after a request for entry has been made at the keypad. When such a request has been made, the controller causes the chime to emit an audible signal to the occupants of the cockpit. The controller also simultaneously begins a first predetermined delay interval. If no action has been taken at the control device by any occupant of the cockpit at the expiration of the first predetermined delay interval, a second audible warning is provided by the chime and a second predetermined delay interval is commenced. At the end of the second predetermined delay interval, if still no action has been taken by any occupant via the control device to either admit or deny the request for entry, then the chime provides a continuous audible warning for a third predetermined time delay interval. At the end of the third delay interval the controller automatically sends a signal to the solenoid to unlock the lock to the cockpit door. A visual indicator also preferably flashes intermittently during the third delay interval further signaling that the cockpit door will be unlocked within a very short time if no action is taken. This operating scheme thus provides a short time period for the occupants of the cockpit to make an assessment as to whether the request for entry to the cockpit should be granted or denied. Conveniently, the door lock is automatically unlocked without intervention by the occupants of the cockpit provided the control device is in the AUTO position. The provision of both audible and visual signals virtually eliminates the possibility that the occupants of the cockpit will not realize that a request for entry has been made. It further allows automatic unlocking of the cockpit door unless an occupant of the cockpit intervenes through appropriate control of the switch.
- It will be appreciated that the keypad described above does not have the capability under any circumstances to unlock the door lock of the cockpit door. The lock is controlled strictly by signals received from the switch provided in the cockpit. Accordingly, no amount of tampering with the keypad, or even the destruction of the keypad, can result in unlocking of the cockpit door once it is locked. Unlocking can be accomplished only via the multi position switch.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
- FIG. 1 is a simplified block diagram of a security system10 in accordance with a preferred embodiment of the present invention; and
- FIG. 2 is a timeline of the three time delay intervals implemented by the controller of the system after a request to unlock the cockpit door is received.
- The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
- Referring to FIG. 1, there is shown a security system10 for controlling access into a control center of a mobile platform. In the following description, the mobile platform will be referred to as a commercial aircraft and the control center will be referred to as the cockpit of the aircraft. It will be appreciated, however, that the system 10 of the present invention is equally applicable to non-moving structures where it is desired to closely control access to a sensitive area of the structure. It is anticipated that the invention may also find applications on other mobile platforms such as ships or even buses. The system 10 advantageously includes only a limited number of independent component parts making it easily retrofitable to existing commercial or other types of aircraft.
- Referring further to FIG. 1, the system10 generally includes a user input device in the form of a keypad 12 which is disposed in the passenger cabin area 13 a of an
aircraft 13, and in one preferred location on a door post assembly 15 a adjacent adoor 15 of theaircraft 13 facing the passenger cabin area. However, the keypad 12 may be placed in virtually any location where it can be conveniently accessed by flight crew members who may need to gain periodic access to thecockpit 13 b of theaircraft 13. - The keypad12 is in communication with a
logic system 14. Thelogic system 14, in turn, is in communication with a control device 16, acircuit breaker 18 and adoor lock solenoid 20. An ambientair pressure sensor 22 disposed in acockpit 13 b of theaircraft 13 communicates with thedoor lock solenoid 20 and thelogic system 14. Thedoor lock solenoid 20 is operably associated with adoor lock 26 for thecockpit door 15, as will be described in greater detail momentarily. - The
logic system 14 comprises a suitable controller, and more preferably an 8-bit controller. Advantageously, thecontroller 14 includes achime 24 which is used to generate an audible signal within thecockpit 13 b of theaircraft 13. The control device 16 is also disposed in thecockpit 13 b and may be mounted on an overhead panel, in an aisle stand panel or at any other conveniently accessible location in thecockpit 13 b. - In a preferred embodiment the control device16 comprises a multi position
rotary switch 28 having a first switch position 30 designated as the “AUTO” position, a second switch position designated the “UNLOCK” position and a third switch position 34 designated as the “DENY” position. Theswitch 28 comprises a manually engageable switch element 36 which is spring biased normally into the AUTO position. The switch element 36 can be moved momentarily into either the UNLOCK position or the DENY position. As soon as the switch element 36 is released, however, it is biased back to the AUTO position. An “UNLOCK”indicator light 38 is also disposed closely adjacent theswitch 28, as is a “LOCK FAILED”indicator light 40. The UNLOCK indicator light 38 is illuminated when a predetermined access code has been correctly entered into the keypad 12, as will be described in greater detail momentarily. The LOCK FAILED indicator light 40 indicates that thesolenoid 20 has not unlocked thelock 26 of thecockpit door 15. - The keypad12 comprises a plurality of
numeric keys 42 and anenter key 42 a, afirst indicator light 44, asecond indicator light 46 and athird indicator light 48. Thefirst indicator light 44 preferably comprises a red LED for indicating that thedoor lock 26 is in a locked condition. Second indicator light 46 preferably comprises an amber LED which is illuminated when a user inputs the predetermined access code correctly via thekeys solenoid 20 has unlocked thedoor lock 26. - The
solenoid 20 includes a microswitch 50 for sensing the position of a plunger 20 a of thesolenoid 20. Accordingly, thecontroller 14 can verify that the plunger 20 a has been moved into the locked position when thesolenoid 20 is energized. This provides an additional degree of security in the event thesolenoid 20 fails and the plunger 20 a is not moved into the “LOCKED” position. In such instance, the LOCK FAILED indicator light 40 will be illuminated by thecontroller 14 to provide an immediate visual indication of such a condition to the occupants of thecockpit 13 b. - The ambient
air pressure sensor 22 is used to detect a drop in pressure in thecockpit 13 b when thecockpit door 15 is closed. Such a condition might occur, for example, if the windshield of theaircraft 13 was broken. In such a situation, it would be necessary to immediately unlock thecockpit door 15 to prevent complete decompression of thecockpit 13 b. Thepressure sensor 22 is thus used to detect a drop in pressure within thecockpit 13 b and to immediately signal this event by deenergizing thesolenoid 20. - Referring to FIG. 2, a description will now be provided of the predetermined time delay sequence that is implemented by the
controller 14. “TO” represents the instant that a user correctly enters the predetermined access code via the keypad 12. This code preferably comprises a three to eight digit numeric code. It is provided to flight attendants or other individuals, prior to entering the aircraft, who may have a need to periodically enter thecockpit 13 b while theaircraft 13 is in operation. Immediately after receiving the correct access code, thecontroller 14 causes thechime 24 to generate an audible signal represented by pulses 52. Pulses 52 represent two “beeps” or other short duration audible signals which immediately apprises the individuals in thecockpit 13 b that a request for access to the cockpit has just been made. At T0, a first predetermined delay interval is commenced which extends in to “T1”. At T1, if thecontroller 14 has not received either in UNLOCK or a DENY command via the switch 28 (i.e., theswitch 28 has not been moved to either of these positions), then the controller causes thechime 24 to again provide audible signals, represented bypulses 54, to remind the occupants of thecockpit 13 b that someone is requesting access to the cockpit. T1 represents the expiration of the first delay interval and the beginning of a second delay interval. - At “T2”, if the
switch 28 still has not been moved out of the AUTO position during the second delay interval, then thecontroller 14 causes a third delay interval to be commenced. At T2 thecontroller 14 causes the UNLOCKED indicator light 38 to be continuously illuminated and thechime 24 is caused to output a continuous audible alert, represented bywaveform 56, that thelock 26 of thedoor 15 will be unlocked within a very short time period if no operator action is taken via theswitch 28. At any time, an occupant in thecockpit 13 b may move the switch element 36 of theswitch 28 to the UNLOCK position 32, which signals thecontroller 14 to turn off thechime 24 and the UNLOCKED indicator light 38, as well as to commandsolenoid 20 to unlock thelock 26. Also at any time during the first delay interval, the second delay interval or the third delay interval, an occupant in thecockpit 13 b may move the switch element 36 to the DENY position 34. This signals thecontroller 14 to turn off thechime 24 and the UNLOCKED indicator light 38, and further inhibits operation of the keypad 12 for a predetermined time thereafter. This predetermined time may vary but is preferably for a time interval of between five minutes to thirty minutes. During this time, if an individual should again correctly enter the access code into the keypad 12, no audible or visual signals would be provided by thechime 24 or UNLOCKEDindicator light 38. After the expiration of this time period, then the user may again input the access code into the keypad 12 and make another request to access thecockpit 13 b. - At T3, as long as no operator selection has been made via the switch28 (i.e., meaning that the switch element 36 has remained in the AUTO position 30), the
controller 14 causes thesolenoid 20 to be deenergized. This causes thedoor lock 26 to be unlocked. Thereafter, manual actuation of the door handle of thecockpit door 15 will allow the door to be opened. - In the preferred embodiment described above, the delay interval between T0 and T3 is user programmable from about 15 seconds to about 120 seconds in 15 second increments. Preferably, the delay interval between T2 and T3 has a minimum duration of at least 10 seconds. The audible signals represented by
pulses 52 and 54 preferably comprise 0.5 second duration audible signals having a frequency of preferably around 500 Hz at approximately 75 dB. It will be appreciated, however, that the duration, frequency and intensity of these audible signals may be modified to suit user preferences. - The UNLOCKED indicator light38, when flashing during the third delay interval, preferably flashes at a 50% to 60% duty cycle, with 60% being the more preferred duty cycle. Again, however, the frequency at which this light flashes may be tailored to suit user preferences.
- When the
lock 26 of thecockpit door 15 is unlocked at point T3, the door is preferably maintained in the unlocked position for a predetermined time interval, and more preferably for at least about five seconds. Again, this delay interval could also be modified. During this time period thesolenoid 20 remains deenergzied. After this short time interval expires, thecontroller 14 again automatically energizes thesolenoid 20 to cause thelock 26 to lock thedoor 15. - The access code is preferably changeable from the
controller 14. This is accomplished by engaging a “PROGRAM” key 58 on thecontroller 14 as indicated in FIG. 1. Once this key is depressed, a new access code can be entered at the keypad 12. - Another optional feature which may be implemented is a “door bell” mode. This mode may be implemented by selecting a particular key, such as the “1” key on the keypad12, followed by the “ENTER” key 42 a. This causes the
chime 24 to generate an audible signal but does not begin the time delay period represented between T0 and T3. In effect, the occupants of thecockpit 13 b are simply apprised that an individual in the cabin area 13 a of theaircraft 13 is requesting access to the cockpit. The audible signal may comprise one or more short duration signals by thechime 24. - The system10 of the present invention thus provides a means by which individuals in the cabin area of the aircraft can request access to the cockpit, and can further initiate a process by which a locked cockpit door will be automatically unlocked if no intervention is taken by occupants of the cockpit. The inclusion of the pressure sensor also ensures that in the event of a decompression condition occurring in the cockpit, the cockpit door will be automatically and immediately unlocked so that the door can be quickly opened. Importantly, the system 10 provides the occupants of the cockpit with the ultimate authority to deny the requested access if circumstances are such that the cockpit occupants believe that the cockpit should remain secure from all individuals in the cabin area.
- Those skilled in the art can now appreciate from the foregoing description that the broad teachings of the present invention can be implemented in a variety of forms. Therefore, while this invention has been described in connection with particular examples thereof, the true scope of the invention should not be so limited since other modifications will become apparent to the skilled practitioner upon a study of the drawings, specification and following claims.
Claims (23)
1. A security system for preventing unauthorized access to a control center of a mobile platform, wherein the control center is separated from a passenger area of said mobile platform by a door; said system comprising:
a lock for locking said door;
a user input device accessible by individuals in said passenger area to input a predetermined access code to request unlocking of said door;
a controller responsive to said user input device for producing a signal within said control center when said access code is entered that entry to said control center has been requested by an individual within said passenger area; and
a control device within said passenger area in communication with said lock for allowing an individual in the control center to unlock said door.
2. The system of claim 1 , wherein:
said control device is in communication with said controller;
wherein said controller is in communication with said lock; and
wherein said control device commands said controller to unlock said lock.
3. The system of claim 1 , wherein said control device comprises a switch for allowing said lock to be immediately unlocked.
4. The system of claim 2 , wherein said control device comprises a switch having a position signaling said controller to unlock said lock after a predetermined time delay period has expired.
5. The system of claim 2 , wherein said control device comprises a switch for signaling said controller to ignore said request for entry and to maintain said lock in a locked position.
6. A security system for preventing unauthorized access to a cockpit of an aircraft, wherein the cockpit is separated from a cabin area by a cockpit door, the system comprising:
a lock for locking the door in a closed position;
a user input device for allowing an individual in said cabin area to input a predetermined access code to request unlocking of the cockpit door;
a controller responsive to said user input device for producing a signal when said access code is entered that entry to the cockpit has been requested; and
a switch in communication with said lock for allowing an individual in the cockpit to unlock said door.
7. The security system of claim 6 , wherein said lock is responsive to said controller and said controller is responsive to said switch; and
wherein said controller commands said lock to an unlocked position a predetermined delay time after said access code is entered at said user input device.
8. The security system of claim 6 , wherein said controller comprises a chime that produces an audible signal when said access code is entered at said user input device.
9. The security system of claim 6 , wherein said switch comprises a multi-position switch in communication with said controller for enabling an individual on said cockpit to deny access to said cockpit and inhibit operation of said user input device for a predetermined time period after said access code had been entered at said user input device.
10. The security system of claim 6 , wherein said switch is in communication with said controller and comprises a multi-position switch including:
a first position in which said switch signals said controller to unlock said lock when said predetermined delay time has expired;
a second position, in which said switch signals said controller to immediately unlock said lock; and
a third position in which said switch signals said controller to maintain said lock in said locked position and to disable said user input device for said predetermined time period.
11. The security system of claim 10 , further comprising:
a chime responsive to said controller for producing an audible signal in said cockpit when said individual in said cabin area has input said access code into said user input device.
12. The security system of claim 10 , further comprising:
an indicator light responsive to said controller for providing a visual indication to an individual on said cockpit that an individual in said cabin area has requested access to said cockpit via said user input device.
13. The system of claim 6 , wherein said user input device comprises a keypad.
14. The system of claim 13 , wherein said keypad comprises:
a first indicator light indicating that said cockpit door is in said locked position;
a second indicator light indicating that said access code has been received by said controller; and
a third indicator light indicating that said lock has been moved to said unlocked position.
15. A security system for preventing unauthorized access to a cockpit of an aircraft, wherein the cockpit is separated from a cabin area by a cockpit door, the system comprising:
a lock for locking the door in a closed position;
a user keypad for allowing an individual in said cabin area to input a predetermined access code to request unlocking of the cockpit door;
a controller responsive to said user input device for producing a signal detectable in said cockpit when said access code is entered that entry to the cockpit has been requested;
a switch in communication with said controller for allowing an individual in the cockpit to select an action including:
commanding said controller to immediately unlock said lock; and
commanding said controller to ignore a previous request by said individual, via said keypad, for access to said cockpit and to maintain said lock in a locked position.
16. The system of claim 15 , wherein said switch includes an automatic response position which signals said controller to automatically unlock said lock after a predetermined time delay period has expired after said access code has been input into said keypad.
17. The system of claim 15 , wherein said predetermined time delay period includes at least:
a first delay interval which commences when said signal is generated that said access code has been entered in said keypad; and
a second delay interval during which said controller produces a second signal signaling to said occupants of said cockpit that said controller will automatically unlock said lock at an expiration of said first delay interval.
18. The system of claim 15 , wherein said predetermined time delay period includes:
a first delay interval which commences when said signal is generated that said access code has been entered in said keypad;
a second delay interval which commences upon the expiration of said first delay interval, said controller generating a second signal at a beginning of said second delay interval reminding occupants of said cockpit that cockpit door has not been unlocked or said request for entry denied via said switch; and
a third delay interval during which said controller produces a third signal signaling to said occupants of said cockpit that said controller will automatically unlock said lock at an expiration of said third delay interval.
19. The system of claim 15 , wherein said keypad comprises:
a first indicator light for indicating that said lock is in a locked condition; and
a second indicator light for indicating that said lock has been moved into an unlocked condition.
20. The system of claim 15 , wherein said keypad comprises:
a first indicator light for indicating that said lock is in a locked condition;
a second indicator light for indicating that said lock has been moved into an unlocked condition; and
a third indicator light for indicating that said access code has been received by said controller and that said occupants in said cockpit have been apprised of said request for entry to said cockpit.
21. The system of claim 15 , wherein said signal comprises an audible signal generated by a chime, and wherein said chime is in communication with said controller.
22. The system of claim 15 , wherein said controller operates to inhibit further requests for entry to said cockpit for a predetermined delay interval if said switch is positioned to command said controller to ignore said previous request for entry to said cockpit.
23. A method for securing a control center of a mobile platform from unauthorized entry, wherein the mobile platform includes a door separating said control center from a passenger area, the method comprising:
using a lock to lock said door in a closed position;
using a user input device to allow an individual in said passenger area to input an access code to request entry to said control center;
using a controller to receive said request for entry and to provide a signal to an occupant in said control center that a request for entry to said control center has been made;
using a control device for allowing said occupant to perform at least one action including:
immediately unlocking said lock; and
unlocking said lock only after the expiration of a predetermined time delay interval.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/100,227 US20030173458A1 (en) | 2002-03-18 | 2002-03-18 | Avionic door lock system |
CA002421441A CA2421441A1 (en) | 2002-03-18 | 2003-03-10 | Avionic door lock system |
DE60327572T DE60327572D1 (en) | 2002-03-18 | 2003-03-18 | Türschliesssystem |
BR0300917-3A BR0300917A (en) | 2002-03-18 | 2003-03-18 | Security system to prevent unauthorized access to a mobile platform control center; security system to prevent unauthorized access to an aircraft cockpit, and method to exempt a mobile platform control center from unauthorized access |
EP03075794A EP1347421B1 (en) | 2002-03-18 | 2003-03-18 | Door lock system |
AT03075794T ATE431291T1 (en) | 2002-03-18 | 2003-03-18 | DOOR LOCKING SYSTEM |
US11/041,616 US8398025B2 (en) | 2002-03-18 | 2005-01-24 | Avionic door lock system |
US11/128,809 US20050218266A1 (en) | 2002-03-18 | 2005-05-13 | Avionic door lock system |
Applications Claiming Priority (1)
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US10/100,227 US20030173458A1 (en) | 2002-03-18 | 2002-03-18 | Avionic door lock system |
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US11/041,616 Division US8398025B2 (en) | 2002-03-18 | 2005-01-24 | Avionic door lock system |
US11/128,809 Continuation-In-Part US20050218266A1 (en) | 2002-03-18 | 2005-05-13 | Avionic door lock system |
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US11/041,616 Active 2025-10-12 US8398025B2 (en) | 2002-03-18 | 2005-01-24 | Avionic door lock system |
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US11/041,616 Active 2025-10-12 US8398025B2 (en) | 2002-03-18 | 2005-01-24 | Avionic door lock system |
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EP (1) | EP1347421B1 (en) |
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US20050082429A1 (en) * | 2002-11-19 | 2005-04-21 | D'alvia Graham R. | Cockpit access protection system |
US7032863B1 (en) * | 2004-10-15 | 2006-04-25 | The Boeing Company | Increased security flight deck door strike apparatus and method |
US20080092630A1 (en) * | 2006-10-18 | 2008-04-24 | Piorkowski Mitchell J | Pressure sensor device |
WO2016125180A1 (en) * | 2015-02-04 | 2016-08-11 | Sarai Amardeep Singh | Cockpit internal anti sabotage system (ciass) |
WO2019222595A1 (en) * | 2018-05-17 | 2019-11-21 | Adams Rite Aerospace, Inc. | Pyrotechnic latch actuator responsive to a decompression detection system and method |
US20200317369A1 (en) * | 2019-04-08 | 2020-10-08 | David Elias Smith | Cockpit access security system |
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FR2906221B1 (en) * | 2006-09-22 | 2009-10-09 | Airbus France Sas | SYSTEM FOR LOCKING AND UNLOCKING A COCKPIT DOOR OF AN AIRCRAFT AND DOOR HAVING SUCH A SYSTEM |
CN103879545B (en) * | 2014-03-20 | 2017-06-09 | 中国商用飞机有限责任公司 | For the hatch door flight lock system of aircraft |
US20160076777A1 (en) * | 2014-09-12 | 2016-03-17 | General Electric Company | Activation of appliance locking features using hand-contact interface |
US20160076776A1 (en) * | 2014-09-12 | 2016-03-17 | General Electric Company | Voice latching of appliance door |
EP3683138B1 (en) * | 2019-01-16 | 2021-04-28 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | A door locking system with a rapid release mechanism |
US20220349219A1 (en) * | 2019-09-26 | 2022-11-03 | Nec Corporation | Door lock control apparatus, in-vehicle apparatus, door lock control method, and non-transitory storage medium |
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Also Published As
Publication number | Publication date |
---|---|
US20050178907A1 (en) | 2005-08-18 |
BR0300917A (en) | 2004-08-17 |
EP1347421A3 (en) | 2006-03-22 |
CA2421441A1 (en) | 2003-09-18 |
ATE431291T1 (en) | 2009-05-15 |
DE60327572D1 (en) | 2009-06-25 |
EP1347421A2 (en) | 2003-09-24 |
US8398025B2 (en) | 2013-03-19 |
EP1347421B1 (en) | 2009-05-13 |
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Owner name: BOEING COMPANY, THE, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BANDY, PAUL W.;GASTON, DARRELL W., JR.;TRUONG, BINH C.;AND OTHERS;REEL/FRAME:012872/0797;SIGNING DATES FROM 20020423 TO 20020426 |
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AS | Assignment |
Owner name: BOEING COMPANY, THE, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BANDY, PAUL W.;GASTON, DARRELL W., JR.;TRUONG, BINH C.;AND OTHERS;REEL/FRAME:017354/0835;SIGNING DATES FROM 20041101 TO 20041118 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |