WO1993026080A1 - Solid-state sensing and control transit car door system - Google Patents
Solid-state sensing and control transit car door system Download PDFInfo
- Publication number
- WO1993026080A1 WO1993026080A1 PCT/US1993/005408 US9305408W WO9326080A1 WO 1993026080 A1 WO1993026080 A1 WO 1993026080A1 US 9305408 W US9305408 W US 9305408W WO 9326080 A1 WO9326080 A1 WO 9326080A1
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- WIPO (PCT)
- Prior art keywords
- doorway
- movement
- solid
- panel means
- panel
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N5/00—Arrangements or devices on vehicles for entrance or exit control of passengers, e.g. turnstiles
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
- E05F15/41—Detection by monitoring transmitted force or torque; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/30—Electronic control of motors
- E05Y2400/32—Position control, detection or monitoring
- E05Y2400/35—Position control, detection or monitoring related to specific positions
- E05Y2400/354—End positions
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/50—Fault detection
- E05Y2400/51—Fault detection of position, of back drive
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/52—Safety arrangements
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/52—Safety arrangements
- E05Y2400/53—Wing impact prevention or reduction
- E05Y2400/54—Obstruction or resistance detection
- E05Y2400/55—Obstruction or resistance detection by using load sensors
- E05Y2400/554—Obstruction or resistance detection by using load sensors sensing motor load
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/51—Application of doors, windows, wings or fittings thereof for vehicles for railway cars or mass transit vehicles
Definitions
- This invention is concerned with automated self-regulating closure of a transit vehicle doorway enabling control of rate of movement of doorway panel means during opening or closure of a transit car doorway and providing for inspection of doorway panel operation for a transit vehicle from memory-stored operational data.
- the invention enables time-modulated solid-state control of drive power for doorway panel movement. Also, safer and more efficient operation results are achieved by combining programmable control with solid-state sensing which eliminates any requirement for mechanical switch-type means for sensing door panel status or movement. Further, the solid-state sensing and control features facilitate customizing concepts of the invention for use with newly developing transit systems or existing transit car door installations.
- FIG. 1 is a diagrammatic view of doorway control means of the invention for a transit car
- FIG. 2 is a diagrammatic view of sensing and operating means embodying the invention for opening and closing doorway panel means
- FIG. 3 is a diagrammatic view of a plurality of transit cars with doorway panel means operable in accordance with the invention for safe transit car movement;
- FIG. 4 is a block diagram for describing a closed loop feedback control embodiment of the invention for operating panel means at an individual doorway and of programmable logic controller means for a transit car;
- FIG. 5 is a block diagram of an embodiment of the invention for describing assembly of control means for solid-state regulation of time-modulated pulsing of power to doorway panel drive means;
- FIG. 6 is an electrical schematic for describing a specific embodiment of the invention with digital control of power pulsing for a reversible-direction electric motor drive for movement of doorway panel means;
- FIG. 7 is an electrical schematic of solid-state door panel sensing devices for coacting with the embodiment of FIG. 6;
- FIG. 8 is a schematic perspective view for describing an embodiment of cam modulating means for effecting the electrical output of solid-state detector means for use in the invention for evaluating door panel movement and for indicating closed door panel position;
- FIG. 9 is a flow chart for describing a programmed main opening sequence of the invention.
- FIG. 10 is a flow chart for describing an opening speed adjustment subroutine of the main opening sequence of Fig. 9;
- FIG. 11 is a flow chart for describing an opening subroutine of the main opening sequence of FIG. 9;
- FIG. 12 is a schematic for describing solid-state control of drive means during an opening sequence such as FIG. 11;
- FIG. 13 is a timing diagram for describing time- modulated power pulsing for movement of doorway panel means in response to an opening subroutine such as that of FIG. 11 or other programmed actions of later figures;
- FIGS. 14 a and b present a flow chart of the main closing sequence for a transit car door program embodiment of the invention
- FIG. 15 is a flow chart for describing a doorway ob ⁇ struction subroutine made available during the main closing sequence of FIGS. 14 a and b;
- FIG. 16 is a flow chart for describing a closing speed adjustment subroutine made available by the main closing sequence of Fig. 14;
- FIG. 17 is a flow chart for describing a closing subroutine provided during the main closing sequence of FIGS. 14 a and b;
- FIG. 18 is a schematic for describing solid-state control of drive means during the closing subroutine of FIG. 17;
- FIG. 19 is a flow chart for describing "last-close" subroutine of FIGS. 14 a and b for doorway panel means, and
- FIG. 20 is a schematic of solid-state for describing solid-state control of drive means during the subroutine of FIG. 19.
- solid- state sensing means in combination with solid-state programmed control of reversible direction drive means enables automated self-regulation of movement sequences for doorway panel means including a doorway closure procedure which is safe and reliable.
- elongated transit car 20 includes two doorways on each of its longitudinal sides.
- Coacting door panels 22, 23 and 24, 25 close their respective doorways on one side of the car; and door panels 26, 27 and 28, 29 are located to close respective doorways on the remaining longitudinal side of the car.
- Present teachings enable control of doorway panel means for doorways with two coacting panels as well as the less frequently occurring single panel doorway.
- doorway control means 30 controls panels 22, 23 and doorway control means 31 controls panels 24, 25.
- Doorway control means 30, 31 are connected individually with a transit car programmable logic controller (36) for certain functions.
- Doorway controllers 38, 39 control door panels 26, 27 and 28, 29, respectively, on the remaining longitudinal side of the car; and programmable logic controller (PLC 36) coordinates opening on each designated side; such as through connecting lines 41 and 43 for door panels 22, 23 and 24, 25 and through lines 44, 45 to control means 38, 39 for the doorways on the remaining side.
- PLC 36 programmable logic controller
- the present invention automates self-regulating sequencing of doorway panel means movement subsequent to an initiating supervisory (opening or closing) signal.
- the source of the supervisory signal can be manually generated or an automatically generated signal can initiate door panel movement while providing for manual override.
- PLC 36 is connected to receive information from doorway control means through connections 46, 47, 48, 49 and connections 50, 51, 52, 53 as shown in FIG. 1. Such connections are used for safety purposes; for example, to verify that each door panel in a transit car is fully closed before allowing a car to move; or for trouble ⁇ shooting purposes in a transit car through individual connection of a doorway control means with the PLC 36.
- FIG. 2 schematically shows components for sensing opening and closing an individual doorway. Movement of panel 22 is controlled by programmable doorway control means 30 which enables opening and closing movement of door panel 22.
- a reversible-direction drive in a specific embodiment, is connected to rotary drive means 54 through mechanical linkage 56.
- a preferred rotary drive means comprises a reversible-direction electric motor with integrated gear box 58.
- the automated self-regulating door closure and other features of the invention can be adapted because of the solid-state sensing and controls taught herein to single or dual panel doorway drives.
- mechanical linkage 56 converts rotary motion into linear motion for a door panel oriented for sliding movement into a recess in the longitudinal side wall of a transit car.
- Cam means 60 of FIG. 2 moves in synchronism with drive 54 (e.g. through its gear unit 58) such that movement of the cam means is responsive to the rate of movement of doorway panel 22. Actual movement of the doorway panel means is reflected back to the drive arrangement by the door linkage (56) and is detected for utilization with programmable doorway controller 30.
- a rotary drive unit facilitates use of a rotary-movement cam (60) for indicating doorway panel position and movement.
- Important contributions of the invention relate to the ability to establish in an automated manner the location, for electronic control purposes, of a discrepancy in movement of panel means at a particular doorway and to limit remedial measures to the doorway(s) at which a discrepancy is indicated.
- Efficiency and effectiveness for rapid transit purposes are enhanced by solid-state monitoring control of movement of doorway panel means which facilitates automated individual corrective action(s) at an indicated doorway including control of rate of movement of doorway panel means during doorway closure.
- Solid-state sensing means and timer means enable digital control of power regulator means supplying a reversible drive for panel means of each doorway during opening and closure.
- a primary objective is to provide for safe self-regulating closures of transit car doorways as part of rapid transit operations; also, provision is made for restraining car movement dependent, for safety purposes, on a verified status of closure of doorway panel means throughout a transit car.
- Solid-state sensors and associated solid-state power regulator means facilitate use of a microprocessor as part of programmable control means for each doorway while increasing reliability by eliminating any requirement for mechanical movement devices in the control of power to panel drive means or for mechanical-type switch means for sensing doorway panel means. That is, in assembly and utilization, electromechanical moving parts are essentially limited to power drive and linkage means for physically moving doorway panel means.
- solid-state proximity sensor device 64 signals an "open" condition; and, solid-state detector 65 is associated with movement of cam 60 to perform multiple functions such as: sensing movement of doorway panel means to determine movement rate and indicating return of doorway panel means to closure position. While the doorway panel means are in motion, detector 65 can sense such movement and coact with a timer function of the programmable doorway controller 30 to indicate a departure (as it is occurring) from standardized rate of movement for doorway panel means.
- the solid-state sensing and computer-assisted solid- state control achievable during opening and closing of doorway panel means provide an effective and practicable method for minimizing hazards to safety in terminating movement of passengers through doorways.
- An automated self-regulating opening and closure procedure for each doorway is achieved in a commuter transit environment.
- passenger car doorway control taught herein does not involve procedures of the type found on elevators or at building entrances in which doorway panels spring full-open when a person approaches or an obstruction exists in a doorway; such procedures would be inconsistent with concepts and technology being presented for facilitating rapid transit objectives.
- the present computer-assisted solid-state control and solid-state sensing contributions are directed to safely achieving rapid transit purposes for heavily-used commuter systems by avoiding and/or substantially eliminating transit delays due to faulty or ineffective doorway control.
- a doorway panel "push-back" feature in the operation of certain prior car door systems could result in an indication of "locked closure” from a connector linkage arm for doorway panel means notwithstanding that a passenger item, such as a briefcase, could be trapped between doorway panels.
- a variance from "fully-closed” status could exist notwithstanding an indication of "locked closure” to a train conductor.
- an obstruction to closure is identified, a remedial procedure is provided and doorway closure is verified.
- the invention detects and locates an obstruction to doorway closure and automates a response (limited to the identified locationfs]) which is directed to clearing the obstruction and establishing doorway closure.
- Detection of an obstruction in any boarding doorway of a transit car automatically initiates a pre-programmed self-regulating doorway closure procedure; for example, limited reopening and altered reclosing movements for that doorway.
- the objectives of selected preprogrammed closure procedures are to give a person the opportunity to move away from an obstructed doorway while, at the same time, eliminating the opportunity for obstruction to closure of other doorways by preventing any reopening of those doorways where no obstruction occurred.
- programmable means such as a microprocessor
- solid-state panel status sensor 64 is located to verify closure of doorway panel means.
- "full-closure" status is directly established from an integral and fixed portion of doorway panel structure.
- Sensed data relating to doorway panel movement and reaching a closed position are achieved through cam modulating solid-state detector 65 in which movement of a cam 60 is interrelated with the drive means.
- the "full- closure" status of the doorway panel means obtained through status sensor means (64) verifies the closed position sensed by the detector means 65 associated with cam 60.
- a doorway controller (such as 30) is connected through transit car PLC (such as 36) for restraining car movement until closure has been verified. Movement of a transit car is subject to manual override at manual interrupt means 67.
- FIG. 3 schematically sets forth cars 20, 64 and 66 in a train indicated generally at 68.
- Car refers to a commuter passenger vehicle and a “train” refers to two or more such vehicles moving by rail or other means of coordinated movement to facilitate passenger transfer at appropriate stations or platforms.
- Transit car programmable logic controllers (PLC's 36, 70, 72, respectively, for individual cars of train 68 in FIG. 3) each provide for interrelating transit cars for train movement through electrical cables 74, 76 which include specialized connector lines 78, 80 and lines 82, 84 for separating supervising sequence initiating signals for each longitudinal side of a car.
- Each transit car PLC (36, 70, 72) is also electrically interconnected from the power supply signal source 87 (by means of lines 88, 90) to train braking system 92. Braking signal control lines can be used to prevent travel until all doorways in the train are closed. Manual override for restraining train movement is also provided (for example, 67 in FIG. 2) .
- the transit car programmable logic controller (such as PLC 36) functions to interrelate individual programmable doorway control means. Closed loop feedback aspects provided for control of a doorway panel means are represented in the block diagram embodiment of FIG. 4.
- a microprocessor can comprise the programmable portion of each doorway control means which also includes isolation means and power regulator means.
- PLC 36 is shown schematically within an interrupted-line border for coaction with each programmable doorway control means.
- a specific doorway microprocessor 96 is connected via gating means 98 to PLC 36; gating means 98 also provides connection for other doorway controls (the number dependent on the type of transit car) .
- each doorway control microprocessor is configured to respond to a sequence initiating signal, to process panel movement and position sensed data and to coordinate timer or other relevant microprocessor functions for preprogrammed sequencing of movement of the doorway panel means at that doorway.
- a supervisory signal input source 100 (manual or automatically generated) for initiating opening or closing is connected at 102, 104 to gating means 98. Sequence initiating and sensed doorway panel movement or position data are arranged for normal operating purposes to control doorway openings on one side of a train upon a given supervisory signal; a separate supervisory signal can be utilized for opening doorways on the remaining longitudinal side of a transit car (as indicated by connections of FIG. 3) .
- a supervisory signal for closing doorway panel means can be timed so as to be automatically generated (with manual override) or can also be manually initiated from a conductor's cab. Also, supervisory signals for opening doorways can be used in combination with platform location means (not shown) which determine that train cars are properly stopped at a station platform to permit passenger transfer by sensing a platform on one or both longitudinal sides of each car in a train.
- a display means (such as 106, FIG. 4) can be made available at each transit car controller for providing an instantaneous visual check of the status of the doorway panel means at individual doorways.
- the programmable doorway control means 30 includes microprocessor 96 connected through interface means 110 to solid-state power regulator 112.
- Drive 114 is connected for power supply by 116 to the power regulator 112.
- Mechanical linkage schematically indicated as 118 in this figure, can be used to connect drive 114 to doorway panel means 22 (single panel or dual doorway panels) and provides for direct mechanical-linkage with feedback of actual movement of doorway panel means (to cam 60 of FIG. 2) .
- positional information from the cam-actuated detector means described in relation to FIG. 2, and verification of complete closure (by proximity sensor means) are represented by arrow 124 between doorway panel means 22 and sensing means 126.
- Sensed data is connected by 130 to the microprocessor (96) of the respective doorway control means.
- the microprocessor (96) of the respective doorway control means In a reversible DC motor drive embodiment provision is made for controlling current direction in the armature windings (FIGS. 5, 6) to control the rotational direction of drive 114 to carry out opening or closing of its respective doorway panel means.
- Each doorway motor drive can include an integral gear box (58, FIG. 2) for delivering appropriate mechanical output to a linear movement linkage (56, FIG. 2) for its respective doorway.
- a drive means with linkage means and programmable control means are used for each doorway.
- Present solid-state sensing and control with microprocessor programming enable certain advantages of the invention to be adapted for control of two panels with one each in doorways which are longitudinally adjacent along a car side wall.
- Doorway panel information from the multiple sources represented by sensing means 126 is transferred directly as shown in FIG. 4 to doorway microprocessor 96; which, as part of the doorway control means, provides signals to power regulator 112 for time-modulated pulsing of power to drive 114.
- Advantages of time-pulsed directional-control are facilitated by microprocessor 96 which is preprogrammed for automated regulation of doorway panel means.
- microprocessor timer means time each opening or closing event providing for evaluating rate of movement of doorway panel means and generating signals as well as providing for pulsing of power to alter movement of panel means.
- Doorway microprocessors (such as 96) are selected with architecture and instruction set capabilities which are optimum for control and bit-sensing applications.
- a commercially available single-chip programmable microprocessor adaptable to present teachings comprises model MCS-51 manufactured by Intel Corporation of Santa Clara, California, USA and, in particular, #8751 of that MCS-51 family which incorporates an on-chip, programmable, read-only memory which is useful for customizing the microprocessor for differing installations.
- the programmable logic controller (such as 36) for a car can be appropriately programmed and connected to handle the desired inputs to display status of doorway panel means for a car, to provide access to memory stored operational data for each doorway, and to provide desired outputs for car braking system signals according to specific conditions of operation.
- the doorway microprocessor (such as 96) and the car PLC (such as 36) can be customized to a particular installation based on the representative programming described herein.
- the block diagram of FIG. 5 presents a general arrangement for assembly of apparatus (such as shown in more detail in FIGS. 6, 7) for achieving digital control of time modulated pulsed power for drive control of doorway panel means.
- microprocessor 96 functions through isolation means 132.
- isolation means is the Phillips ECG Type 3045 Opto- Isolator, available from Phillips ECG, Inc. , Williamsport, PA.
- Local display 134 indicates status of a doorway motor drive using, for example, light emitting diodes (LEDs) connected to the control wires. Such local indication is especially useful during operational testing.
- LEDs light emitting diodes
- Solid-state power regulator 112 is electronically activated through doorway microprocessor 96 to control power from supply connection 136 (FIG. 5) for doorway panel movement during opening and closing. As shown in more detail in the specific embodiment of FIG. 6, the solid-state regulator uses control voltage to gate direct current (at power voltage level) under microprocessor control to field windings 138 and armature windings 140 of a reversible-direction DC motor (connected as shown in FIG. 6) . Opening or closing drive movement is controlled by the direction of the current established in the armature windings. Drive power for the motor 114 is regulated and adjusted as programmed in the microprocessor to provide time period control and pulse width modulation during a working cycle. FIGS.
- Interface circuitry 110 is combined with doorway control circuitry 111 in FIG. 6 and coacting doorway sensing means and circuitry are set forth in FIG. 7.
- doorway panel movement signal means 150, 152, 154, 156 from the microprocessor are directed through open-collector buffers (such as 160) to isolators (such as optical isolator 162) .
- the input circuit of an isolator (such as 162) is fed via control voltage connection 164 (at a control voltage of about five volts) and its output circuit is fed via power supply connection 166 (at power voltage level selected, for example, at about thirty-seven volts) .
- the power supply shares a common ground connection at 168 with the light emitting diodes (such as 170) which are used for local display.
- the latter connects each isolator output with an LED showing instantaneous state of door movement commands being sent to the power regulator 112 shown within a broken line border in FIG. 6) .
- Each isolator output passes through a current limiting resistor (such as 172, typically 750 ohms) to connectors (such as 180) to the solid-state power regulator 112 for time-modulated pulsing of power such that rate and direction of doorway panel movement can be constantly under digital control.
- Connections 150, 152, 154, 156 transmit signals under control of the microprocessor for combinations involving three modes: ON, OFF and PULSED.
- the relative state of those signal connections ultimately determines power (e.g. , current in the reversible DC motor embodiment) as well as direction of motion (OPEN or CLOSE) and control of rate of movement during closing (or opening) of the doorway panel means.
- power e.g. , current in the reversible DC motor embodiment
- OPEN or CLOSE direction of motion
- FIGS. 6 and 7 set forth a circuitry embodiment for two panels coacting at a doorway with four signals from the isolation and local (doorway) display circuits being transmitted via connectors 180, 182, 184 and 186.
- Signal connectors 180 and 184 transmit the "open" signal for the reversible-direction drive motor for the two coacting panels to be opened together; both 180 and 184 must be activated before the coacting panels will open.
- Signal connectors 182, 186 transmit a "close” signal for the DC motor drive for doorway panels to be closed; both signals must be activated for drive controlled closing movement.
- motor drive control signals are directed via connectors 180, 182, 184 and 186 to the solid-state power regulator 112 which is connected to 166 for power supply.
- Circuit breaker 190 and an emergency cutoff switch are connected in the power supply line to field windings 138 and the armature winding 140 of the reversible-direction DC drive motor through the solid- state power regulator 112.
- each transistor circuit (such as 200) includes a transistor and diode (as shown) so as to provide for controlling direction of current in the armature windings of the DC motor.
- signals on connectors 180, 184 trigger transistor circuits 200, 206 to establish pulsed current (as shown later herein) in field windings 138 and armature windings 140.
- pulsed current is established oppositely in the armature windings by connector 182, 186 signals triggering transistor circuits 202, 204 (while transistor circuits 200, 206 are non-conducting) .
- the doorway microprocessor pulses one of the transistor circuits to bypass (in effect short out) the armature for short periods of time (causing an electrical braking effect) .
- the following table illustrates input signal combinations to achieve (in the order listed) an opening mode, a closing mode, and a "last-close” or “slowing" mode in the embodiment of FIG. 6:
- the PULSE signal serves to bypass current in the armature and increase field current thus applying a speed-regulating cushioning as a function of the controlled working cycle.
- Power to the armature is digitally pulsed by the microprocessor to slow panel movement in approaching full closure and/or full opening. Timing for start of each pulsing can be determined, for example, by termination of the most recent pulse from the "cam-modulated" panel movement sensing means to the doorway controller microprocessor.
- FIG. 7 shows sensing and circuit connections for use with FIG. 6 for closing and opening coacting doorway panels.
- Sensed data are directed through connectors 230, 232, 234, 236 and 238 of FIG. 7 from the solid-state proximity sensors 240, 242 of FIG. 7 as well as from solid-state cam-modulated circuit m ⁇ ins of Hall-effect detectors 245, 247.
- Doorway closure verification sensor means include a proximity sensor 240, 242, respectively, for each coacting doorway panel.
- two detectors 245, 247 are activated due to motion of the cam 60 which is synchronized for movement with the drive means (whether for a single panel or pair of coacting doorway panels) .
- cam-modulated detectors Preferably two cam-modulated detectors are used and positioned, for example, as shown in FIG 8.
- a local indication LED
- Power supply connection means 250, 252 in the FIG. 7 schematic
- An input for the doorway microprocessor is typically connected, for example, to connector 230; a signal trace for cam modulated detector means 245 is connected at node 260 to a "pull-up" resistor such as 262; signal current is established when detector 245 is active.
- solid-state proximity sensors 240, 242 rely on modifying the circuit value of electrical induction, for example, by doorway panel structure being positioned in juxtaposition to indication means, and ca - responsive (Hall-effect) detectors 245, 247 rely on modulation (by cam 60) of a magnetic field.
- Each proximity sensor is used to verify closure of a doorway panel; and, preferably, full-closure of each coacting panel is established directly from a fixed portion of doorway panel structure.
- Hall-effect detectors of FIG. 8 can be used for signalling doorway panel means position and one can be used for sensing movement of the doorway panel means.
- Hall-effect detector means are selected from commercially available units such as the 4AV series manufactured by Micro Switch Division of Honeywell, Freeport, Illinois. Typically an internal permanent magnet and a responsive semiconductor sensor element are separated by a gap. Interposition of a magnetically permeable material, in effect, shields the solid state sensor so that the device becomes active when the permeable material is removed.
- the detectors can be connected for opposite utilization or the doorway microprocessor(s) can be programmed to respond to either active or inactive status dependent on permeable material shielding of the solid-state element.
- the cam configuration is positioned for relative movement with respect to the Hall-effect detectors in which peripheral portions (radially extending fingers) of the cam configuration move into or through a gap, presented by the detector structure, between a permanent magnet on one leg and a responsive semiconductor on the other leg.
- Hall-effect detectors 245, 247 are, per se, isolators and thus connectors 230, 232 need no further isolation with respect to the doorway microprocessor (96) .
- signal wire 230 represents the Hall-effect detector 245 signal that the permeable-material cam has come to its rotational position indicating that the cam (and doorway panel means associated through the drive means) are in a closed position; that signal is connected directly to doorway microprocessor (96) input because the Hall-effect detector isolates sensor voltage from control (logic) voltage level.
- Signal wire 232 represents movement of a peripheral configurational portion of FIG. 8 passing through the gap of the detector means 247 which can be used to sense rate of doorway panel movement during opening or closing. Such signal is connected by 232 to another input connection for the doorway microprocessor (96) providing, for example, for measuring the exact time of the motion event, or for measuring rate of movement or position of doorway panel means.
- Signal wire 238 is directed to the doorway microprocessor (96) through a differing input connection with isolation at 256; in other customized installations, the doorway microprocessor inputs can also be responsive to signals for representing other events or states.
- the connectors 234, 236 operate at the higher sensor signal voltage level and represent selected combinations of activation of the four sensors for use in safety control of movement. Provision can be made for sensing the status of each connector 234, 236 at any time.
- a common ground is provided for both power and control.
- the magnetic field for the Hall-effect sensors is, preferably, by permanent magnet but could be provided by electromagnet means (not shown) .
- the permeable-material cam 60 in combination with
- Hall-effect semiconductor sensor elements comprise detector means 245, 247 and is used in connection with doorway microprocessor timer means which establishes standardized rate of movement (in a particular transit car door system) for opening or closing a doorway.
- Closing movement can be sensed to indicate a departure from normal closing time.
- a change from standardized movement during closure is used to cause activation of an altered closing sequence.
- An obstruction to closure can be determined based on departure from an established standard closing time program or by sensing stoppage of movement during closure.
- a doorway microprocessor (such as 96) can be selected from units manufactured by Intel Corporation, Santa Clara, CA 95052 from that company's designations 8032, 8052 or 8751; or, similar microprocessor units with stored program control in combination with an internal or external program memory such as a programmable read-only memory (PROM) .
- PROM programmable read-only memory
- Transistor circuits such as 200 in power regulator 112 are available from Powerex, Inc. of Youngwood, PA 15697.
- Proximity Sensors (such as 240, 242) are available from Microswitch Division, Honeywell, Inc. of Freeport, IL 61032.
- a suitable motor drive is operated at 37 volts, Model #DV-37, with associated gearbox, available from Vapor Corporation, Chicago, Illinois.
- the program for a doorway controller microprocessors (such as 96) has been subdivided for purposes of illustration and description into opening sequencing (FIGS. 9 through 13) and closing sequencing (FIGS. 14 through 20) with the latter including an obstruction sensing sequence.
- a programmable doorway microprocessor (selected from the MCS-51 family, produced by Intel Corp. of California, in particular # 8071, 8571) facilitates taking advantage of the solid-state sensing of data and control features for interrelating apparatus to carry out transit car doorway opening and closing methods of the invention.
- a doorway microprocessor may be programmed in machine language or otherwise.
- a specific embodiment of the doorway microprocessor program incorporates flow charts as described and presented in the drawings. The program may at any instant be under control of a main operating loop, or under control of an event which may have occurred, externally; such as, for example, the change of state of a designated input pin. Or an event which may have occurred internally, such as, for example, a change of state of a timer.
- an opening routine is executed; if a closing sequence is needed, a closing routine is executed; if neither is needed, the test is repeated until one or the other becomes logically appropriate. Programming is carried out to ensure that all routines preserve and restore processor status so that no routine will corrupt another routine.
- the main processing loop is described first with respect to opening then with respect to closing.
- a "Main Opening Routine” first clears final "CLOSE” flag (302), then tests for doors fully opened (304) ; if so, a clearing routine (306) is executed and program control returns to the main loop. If the direction has changed, status flags are set (308) . If a "SLOW” flag is active, a particular numeric value is stored (310) for use, by e.g. an on-chip timer. If for any reason a "CHECK SPEED" flag has become active as a result of any other process, an "Open Speed Adjustment” subprogram (312) described below is invoked.
- an "Open Speed Adjustment” subprogram 312 tests data derived from panel position sensors to see if an "almost open” condition exists, and stores 314 or 316 in appropriate "fast” or “slow” numeric value for use by timer registers. Measured timing data from measured movement of panel means is compared for "too fast” or “too slow, and a correction is made to a stored numeric value for use by timing registers.
- FIG. 11 illustrates program flow during opening and FIGS. 12 and 13 are for describing the effect on the drive motor direction and the timer function for control of the drive motor.
- output pins are unconditionally set to establish the direction of current through the motor armature 140. While doorway panel means are in motion, there are always three of the four inputs set to a static state (ON or OFF) , and the fourth is pulsed for speed or braking control of panel means.
- FIGS. 6, 7 sets forth a more detailed description of how the signals coact with transistor circuits 200, 202, 204 and 206 of solid- state power regulator 112.
- FIG. 13 illustrates how the value stored in timing registers affects motor speed (hence doorway panel rate of movement) by imposing absolute control over period (also referred to as "PER") and pulse width (also referred to as "PW”) so as to determine the "duty cycle.”
- PER absolute control over period
- PW pulse width
- FIGS. 14 a and b embody the closing, closing speed control, and features for sensing an obstruction to closure. If the doorway panel is indicated as closed according to one panel sensor a redundant check is made at 320, using an alternate sensor, before a signal is transmitted allowing vehicular movement; an exception invokes an obstruction routine 322, described below (FIG. 15) . Even if fully closed is indicated, an obstruction test is made with optional execution of the same routine. A "change of direction” test is made with appropriate reestablishment 324 of status and register values. A “slow" request state is interrogated with appropriate storing 326 of numeric values for use by timer registers. Another obstruction test is performed with appropriate action as described.
- FIG. 15 illustrates the "Obstruction Subroutine" 322 that may be invoked as part of FIGS. 14 a and b or elsewhere.
- a position test 340 is based primarily on the Hall-effect position sensor acting with cam 60 as described above.
- a review of prior obstruction action 342 and a direction change test 344 are performed with exit if either is true.
- FIG. 16 illustrates the adjustment of speed for closing, in response to a "nearly closed” condition, a mismatch between panel positions, an obstruction, or any other designated purpose.
- a sequence of position tests 350 first determines whether the adjustment is necessary, with exit if not; then allows alteration of speed for final closing.
- Numeral values are stored for use by timer registers in comparing motion of the cam 60 of the Hall-effect detector device (described above under FIG. 8) .
- a flag is cleared to indicate to other routines that the function has been accomplished.
- FIGS. 17 and 18 relate to the elemental "Close Subroutine" that is invoked as part of the "Main Closing Routine" of FIGS. 14 a,b or elsewhere. Like the "Open Subroutine" of FIG. 13, the close subroutine illustrated by FIG. 17 is accompanied by the FIG. 18 schematic showing input states for armature current direction.
- FIGS. 19 and 20 relate to the elemental "Last Close Subroutine" provided for the "Main Closing Routine" of FIGS. 14 a,b. Like the "Open" routine of FIG. 11, the program flow illustrated by FIG. 19 is accompanied by FIG. 20 schematic showing input states for armature current direction.
- LED light emitting diode
- An important feature is the ability to observe the operation as it is being performed by observation of the light emitting diode (LED) displays described in regard to FIGS. 6, 7, and elsewhere above.
- LED light emitting diode
- RAM read-write random access memory
- maintenance logging data is stored in an on-board RAM with memory access identical in method to the storage of any other dynamic data used by the microprocessor.
- the event data, along with its day number (since reset of the date)and time of occurrence are stored in abbreviated alphanumerical character format.
- the storage function can be inserted at any point in the main control loop of the microprocessor program.
- a control switch (not shown) applied to one of the doorway microprocessor inputs causes a separate program to read the stored data and apply it to a input-output pin of that microprocessor.
- the data may be accepted, stored and/or displayed by any compatible personal computer, display terminal or printer; or may be transmitted via a modem to a similarly equipped device by telephone.
- the data then may be viewed and analyzed by a knowledgeable maintenance operator, may be analyzed by a custom computer program constructed in any programming language, or with the aid of a simple formatting routine in the BASIC language or any other computer language,may be expanded from its abbreviated alphanumeric format into a formal report or a selected portion thereof.
- such a report may contain the date and time of the last setting of date and time; the time elapsed since then to that of the current data; the date and time of the current data; the existence of a particular "open” or “close” command signal or any other related event; the execution of subordinate commands to the doorway microprocessor (or control circuit means) for the execution of an intended subordinate operation; the actual response of elements of the door control system in carrying out the intended operation or subordinate operation; a comparison of intended versus actual operations or subordinate operations; and a "pass-fail" event result from analysis or direct use in maintenance or inspection activities.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU45294/93A AU4529493A (en) | 1992-06-08 | 1993-06-08 | Solid-state sensing and control transit car door system |
BR9305540A BR9305540A (en) | 1992-06-08 | 1993-06-08 | Apparatus for automated self-regulating control of opening and closing door opening panel devices for automated self-regulating displacement of door opening panel devices for automated self-adjusting opening and closing of door opening panel devices and to control the opening and closing of the door opening of a local mass transit vehicle and processes for controlling the opening and closing of a door opening of the transposing vehicle |
EP93915236A EP0598893A1 (en) | 1992-06-08 | 1993-06-08 | Solid-state sensing and control transit car door system |
JP6501640A JPH06509935A (en) | 1992-06-08 | 1993-06-08 | Solid-state sensing and control of automotive door systems |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89493792A | 1992-06-08 | 1992-06-08 | |
US07/894,937 | 1992-06-08 | ||
AU26361/92A AU650575B2 (en) | 1990-09-25 | 1992-10-12 | Transit car door system and operation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993026080A1 true WO1993026080A1 (en) | 1993-12-23 |
Family
ID=25619890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1993/005408 WO1993026080A1 (en) | 1992-06-08 | 1993-06-08 | Solid-state sensing and control transit car door system |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1993026080A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2070800A2 (en) * | 2002-07-31 | 2009-06-17 | Hitachi, Ltd. | Platform door control apparatus |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006392A (en) * | 1975-09-02 | 1977-02-01 | Catlett John C | Electronic sliding door |
US4134050A (en) * | 1977-01-25 | 1979-01-09 | Dan Sibalis | Door activating motor control apparatus |
US4408146A (en) * | 1981-01-30 | 1983-10-04 | Automatic Doorman, Inc. | Automatic door operator |
US4529920A (en) * | 1981-12-23 | 1985-07-16 | Yoshida Kogyo K. K. | Control apparatus for an automatic door with a minimum error in a detected door position |
US4563625A (en) * | 1984-05-17 | 1986-01-07 | The Stanley Works | Automatic door control system |
-
1993
- 1993-06-08 WO PCT/US1993/005408 patent/WO1993026080A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006392A (en) * | 1975-09-02 | 1977-02-01 | Catlett John C | Electronic sliding door |
US4134050A (en) * | 1977-01-25 | 1979-01-09 | Dan Sibalis | Door activating motor control apparatus |
US4408146A (en) * | 1981-01-30 | 1983-10-04 | Automatic Doorman, Inc. | Automatic door operator |
US4529920A (en) * | 1981-12-23 | 1985-07-16 | Yoshida Kogyo K. K. | Control apparatus for an automatic door with a minimum error in a detected door position |
US4563625A (en) * | 1984-05-17 | 1986-01-07 | The Stanley Works | Automatic door control system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2070800A2 (en) * | 2002-07-31 | 2009-06-17 | Hitachi, Ltd. | Platform door control apparatus |
EP2070800A3 (en) * | 2002-07-31 | 2011-03-02 | Hitachi, Ltd. | Platform door control apparatus |
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