CA1265110A - Process and apparatus for preventing bird collisions - Google Patents
Process and apparatus for preventing bird collisionsInfo
- Publication number
- CA1265110A CA1265110A CA000530672A CA530672A CA1265110A CA 1265110 A CA1265110 A CA 1265110A CA 000530672 A CA000530672 A CA 000530672A CA 530672 A CA530672 A CA 530672A CA 1265110 A CA1265110 A CA 1265110A
- Authority
- CA
- Canada
- Prior art keywords
- light source
- control unit
- cycle
- aircraft
- accordance
- 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.)
- Expired
Links
Classifications
-
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
The collision of birds with aircraft is prevented by means of at least one light source installed on an aircraft which produces light flashes. The frequency of the light flashes produced thereby is varied during at least one cycle time period. The frequency of light flashes is advantageously continuously increased one or more times in a range of from approximately 0.1 Hz to 3.0 Hz, and the maximum frequency may then be maintained. Two such light sources are preferably visible to the birds.
The collision of birds with aircraft is prevented by means of at least one light source installed on an aircraft which produces light flashes. The frequency of the light flashes produced thereby is varied during at least one cycle time period. The frequency of light flashes is advantageously continuously increased one or more times in a range of from approximately 0.1 Hz to 3.0 Hz, and the maximum frequency may then be maintained. Two such light sources are preferably visible to the birds.
Description
121~51~0 Collisions with b;r~s represent a considerable safety risk in aviation, particularly since faster aircraft have such high approaching speeds that within the prewarning time birds are unable to leave the collision area. For this reason, coLlisions with birds termed ~bird impacts", frequently occur. A
collision with one small bird does not, in general, cause great damage, although serious accidents have occurred. At sufficiently high speeds, however, and particularly with smaller jet aircraft, the impact can be so great that the body of the bird penetrates the cockpit wall or the forward edge of the wing. Cases are known in which people have been injured by bodies of birds penetrating the cahin. Particularly dramatic are collisions of commercial airlines with whole flocks of birds. Under certain circumstances, the engines may be stopped and may be significantly damaged in such collisions. Large jet engines of commercial airlines produce a considerable low pressure in their suction areas, whicb additionally increases the risk for birds in the danger zone of belng sucked into the engines. The turbine blades of such engines are subjected to extremely high thermal and m2chsnical stresses and a bird being sucked in, may, under certain cicumstances, knock off a turbine blade. The immediately ensuing unbalance produces dangerous vibrations, so that the pilot must immediately shut off the affected engine.
The engine turbine blade which has been knocked off can cause a great deal of damage in the interior of the engine. If the fuel feed system is damaged, the engine may catch fire. The material damages are tremendously expensive tc repair and large costs are also incurred by having the aircraft out of service. Worldwide, about 200,000 bird impacts are registered every yaar, and the resulting damages entail costs of about 2 to 3 1/2 billion dollars. These figures alone demonstrate that a remedy is urgently needed.
Various means have previously been used to discourage birds from collision danger zones. Such measures are, for example, following measures to make an airport hostile to birds. Thus in many places, all trees and bushes have been removed to deprive the birds of any nesting places. Furthermore, the grass on the land adjoining the runways is cut diligently as short as possible, to thereby reduce the feeding potential for the birds. Additionally grass which has been cut short permits the spotting of a flock of birds sooner. Along with the these natural measures, specially trained birds of prey may ~e settled on the grounds of the airport, and these birds will keep their ~ 'w J
' 126~
territory free of rival birds. Various technical means have been used to chase birds away, such as for example, a stationary acoustical warning device, which cracks or blasts at irregular intervals. Also, various optical warning signals utilizing different colors, intensities, and blinking intervals have been used. All of these devices have proven to be only partially effQctive, but they have not been able to provide an efficient prevention of bird impacts. A cracking sound does, of course, alarm the birds, but there is no guarantee that the birds will fly away from the danger ~one. Sometimes, they may even fly directly into the collision area, which they do not recognize as such due to the rapid approach of an airplane. Furthermore, a certain habituation to the sound often occurs, even if~the crack or blast is emitted at irregular intervals, so that the effect is ultimately unsatlsfactory in many cases. Similar unsat~sfactory results were obtained with optical warning ~ ~o~ E
A devices. The birds, soon be~ame accustomed to all possible light colors and blinking lights. It is an object of the present invention to solve this problem and to provide a process and apparatus which effectively prevents the impact of birds wit~ aircraft and prevents all the negative consequences to aviation.
The object stated above is attained by providing a method for preventing bird impacts with aircraft during the taXe off and landing phases of the aircraft, as well as during flight, by means of providing at least one light source on the airplane which produces flashes of li~ht, the frequency of the light flashes produced varying during at least one cycle period.
One advantage of this method is that this type of warning ls aesigned to be specific for birds. A bird perceives the world entirely differently from human beings. Its senses operate entirely differently from human senses. Its hearing and eyes react to different frequency ranges. It is therefore necessary to develop a process for preventing bird collisions in close cooperation with researchers studying the behavior of birds. Results from this area of research demonstrate that bird behavior is determined essentially by visual means; that is, the sense of sight is dominant and primarily determinative of behavior. At the same time, birds are relatively unintelligent and strongly influenced by instinct. They have, for example, a pronounced ~g~ instinct, which is vital to their survival and which is triggered in a specific manner. If it is desired that a bird fly away in a ._ , i51~0 specific direction, or away from a certain area, an escape impulse must be produced, ~hereby the follo~ing three primary considerations are of great significance: attention, speed and direction.
The attention of the bird must be arrested, after which the escape impulse is produced. In this connection, behavioral research shows that a flashing light substantially increases the attentiveness of birds. Even a blinking light increases the attention of the bird to a significant extent, relative to a stationary light condition. An actual flash of light, on the other hand, produces about ten times as great a level of attentiveness as a simple blinking light. The process of the present invention makes use of this fact.
The brief flashing of the light source is therefore important, because it produces the so-called solar effect in birds. This means that a fleeing bird tends to fly in a direction toward a bright light, even if this is a blinking light. On the other hand, this effect is not observed with a flashing light.
It is obvious that a bird will escape faster, the faster a potential enemy approaches it. The process of the present invention therefore makes use of the fact that a strobe light flashing at an increasing frequency gives a bird the impression of a rapidly approaching enemy, so that it flees at a high speed from this flashing light source. ~ith a uniform flashing frequency, the birds display a less pronounced escape reaction. After extensive experiments, an increase in the flashing frequency in the range of about O.l Hz to about 3.0 Hæ proved to be the most effective. Even after long-term use, a strong escape reaction away from the flashing light was provoked in the birdæ.
The simple scaring of the birds cannot alone prevent a bird impact. It is necessary that the birds leave a certain area, namely, the collision zone, and in addition, that they remain outside this area and not return to the collision zone after being scared away.
A further, and very important point, is that the process utilizes two light sources which are visible to the bird. In this ~ay, it is easier for the bird to determine the direction and speed of the flashing lights, so that it can fly in the direction away from and not into the path of the approaching aircraft.
Light sources for executing the process in accordance with the present invention are preferably installed on the aircraft so that two light sources are always visible to birds in the danger zone. The danger zone lncludes, on iL2~Sl~
the one hand, the actual collision zone, which comprises the cross-sectional profile of the aircraft along its flight path. The danger zone also includes, on the other hand, the space from which a bird can fly into the collision zone within the approach time of the aircraft. This space is delineated approximately by a cone which extends forward from the wingtips of the aircraft, the opening angles of which become smaller, the faster the aircraft moves. In a commercial airliner which is taking off with a taXe-off speed of approximately 80 m/s, this opening angle amounts to about 15. If the aircraft is taxiing at the flying speed of the bird, the angle amounts to approximately 90. Installation of the light sources is therefore advantageously carried out on both supporting surfaces, most preferably in the area of the engines. It has been found in tests that the ideal cycle time for the light sources corresponds approximately to the time from taxiing up until take-off, approximately 20 to 30 seconds, and the flashing frequency during one cycle i5 preferably increased from approximately 0.5 Hz to approximately
collision with one small bird does not, in general, cause great damage, although serious accidents have occurred. At sufficiently high speeds, however, and particularly with smaller jet aircraft, the impact can be so great that the body of the bird penetrates the cockpit wall or the forward edge of the wing. Cases are known in which people have been injured by bodies of birds penetrating the cahin. Particularly dramatic are collisions of commercial airlines with whole flocks of birds. Under certain circumstances, the engines may be stopped and may be significantly damaged in such collisions. Large jet engines of commercial airlines produce a considerable low pressure in their suction areas, whicb additionally increases the risk for birds in the danger zone of belng sucked into the engines. The turbine blades of such engines are subjected to extremely high thermal and m2chsnical stresses and a bird being sucked in, may, under certain cicumstances, knock off a turbine blade. The immediately ensuing unbalance produces dangerous vibrations, so that the pilot must immediately shut off the affected engine.
The engine turbine blade which has been knocked off can cause a great deal of damage in the interior of the engine. If the fuel feed system is damaged, the engine may catch fire. The material damages are tremendously expensive tc repair and large costs are also incurred by having the aircraft out of service. Worldwide, about 200,000 bird impacts are registered every yaar, and the resulting damages entail costs of about 2 to 3 1/2 billion dollars. These figures alone demonstrate that a remedy is urgently needed.
Various means have previously been used to discourage birds from collision danger zones. Such measures are, for example, following measures to make an airport hostile to birds. Thus in many places, all trees and bushes have been removed to deprive the birds of any nesting places. Furthermore, the grass on the land adjoining the runways is cut diligently as short as possible, to thereby reduce the feeding potential for the birds. Additionally grass which has been cut short permits the spotting of a flock of birds sooner. Along with the these natural measures, specially trained birds of prey may ~e settled on the grounds of the airport, and these birds will keep their ~ 'w J
' 126~
territory free of rival birds. Various technical means have been used to chase birds away, such as for example, a stationary acoustical warning device, which cracks or blasts at irregular intervals. Also, various optical warning signals utilizing different colors, intensities, and blinking intervals have been used. All of these devices have proven to be only partially effQctive, but they have not been able to provide an efficient prevention of bird impacts. A cracking sound does, of course, alarm the birds, but there is no guarantee that the birds will fly away from the danger ~one. Sometimes, they may even fly directly into the collision area, which they do not recognize as such due to the rapid approach of an airplane. Furthermore, a certain habituation to the sound often occurs, even if~the crack or blast is emitted at irregular intervals, so that the effect is ultimately unsatlsfactory in many cases. Similar unsat~sfactory results were obtained with optical warning ~ ~o~ E
A devices. The birds, soon be~ame accustomed to all possible light colors and blinking lights. It is an object of the present invention to solve this problem and to provide a process and apparatus which effectively prevents the impact of birds wit~ aircraft and prevents all the negative consequences to aviation.
The object stated above is attained by providing a method for preventing bird impacts with aircraft during the taXe off and landing phases of the aircraft, as well as during flight, by means of providing at least one light source on the airplane which produces flashes of li~ht, the frequency of the light flashes produced varying during at least one cycle period.
One advantage of this method is that this type of warning ls aesigned to be specific for birds. A bird perceives the world entirely differently from human beings. Its senses operate entirely differently from human senses. Its hearing and eyes react to different frequency ranges. It is therefore necessary to develop a process for preventing bird collisions in close cooperation with researchers studying the behavior of birds. Results from this area of research demonstrate that bird behavior is determined essentially by visual means; that is, the sense of sight is dominant and primarily determinative of behavior. At the same time, birds are relatively unintelligent and strongly influenced by instinct. They have, for example, a pronounced ~g~ instinct, which is vital to their survival and which is triggered in a specific manner. If it is desired that a bird fly away in a ._ , i51~0 specific direction, or away from a certain area, an escape impulse must be produced, ~hereby the follo~ing three primary considerations are of great significance: attention, speed and direction.
The attention of the bird must be arrested, after which the escape impulse is produced. In this connection, behavioral research shows that a flashing light substantially increases the attentiveness of birds. Even a blinking light increases the attention of the bird to a significant extent, relative to a stationary light condition. An actual flash of light, on the other hand, produces about ten times as great a level of attentiveness as a simple blinking light. The process of the present invention makes use of this fact.
The brief flashing of the light source is therefore important, because it produces the so-called solar effect in birds. This means that a fleeing bird tends to fly in a direction toward a bright light, even if this is a blinking light. On the other hand, this effect is not observed with a flashing light.
It is obvious that a bird will escape faster, the faster a potential enemy approaches it. The process of the present invention therefore makes use of the fact that a strobe light flashing at an increasing frequency gives a bird the impression of a rapidly approaching enemy, so that it flees at a high speed from this flashing light source. ~ith a uniform flashing frequency, the birds display a less pronounced escape reaction. After extensive experiments, an increase in the flashing frequency in the range of about O.l Hz to about 3.0 Hæ proved to be the most effective. Even after long-term use, a strong escape reaction away from the flashing light was provoked in the birdæ.
The simple scaring of the birds cannot alone prevent a bird impact. It is necessary that the birds leave a certain area, namely, the collision zone, and in addition, that they remain outside this area and not return to the collision zone after being scared away.
A further, and very important point, is that the process utilizes two light sources which are visible to the bird. In this ~ay, it is easier for the bird to determine the direction and speed of the flashing lights, so that it can fly in the direction away from and not into the path of the approaching aircraft.
Light sources for executing the process in accordance with the present invention are preferably installed on the aircraft so that two light sources are always visible to birds in the danger zone. The danger zone lncludes, on iL2~Sl~
the one hand, the actual collision zone, which comprises the cross-sectional profile of the aircraft along its flight path. The danger zone also includes, on the other hand, the space from which a bird can fly into the collision zone within the approach time of the aircraft. This space is delineated approximately by a cone which extends forward from the wingtips of the aircraft, the opening angles of which become smaller, the faster the aircraft moves. In a commercial airliner which is taking off with a taXe-off speed of approximately 80 m/s, this opening angle amounts to about 15. If the aircraft is taxiing at the flying speed of the bird, the angle amounts to approximately 90. Installation of the light sources is therefore advantageously carried out on both supporting surfaces, most preferably in the area of the engines. It has been found in tests that the ideal cycle time for the light sources corresponds approximately to the time from taxiing up until take-off, approximately 20 to 30 seconds, and the flashing frequency during one cycle i5 preferably increased from approximately 0.5 Hz to approximately
2.0 Hz. Since the ideal cycle tima is dependent upon the type of aircraft, the apparatus of the present invention provides for variable selection of the cycle time. The cycle may proceed successively, either once or repeatedly, since the frequency of flashing returns to the initial value after each cycle. After the expiration of one or more cycles, the light source or sources advantageously flash at the maximum end frequency, until the device is switched off again.
The light source itself preferably comprises a discharge Lamp, which produces a very dazzling and rapidly flashing light, which is particularly well suited for the execution of the process of the present invention. This discharge lamp may be provided with current by means of an onboard power system and may be controlled by means of a special control unit in the form of a microprocessor. Various cycles and frequencies may be programmed into its storage memory and may then be individually recalled by making a corresponding program selection. Cycles and flashing frequencies are thereby available and can be selected for the types of birds which need to be scared away, and the speeds of the corresponding types of aircraft. The illumination time of each flash is preferably short to produce the most dazzling high intensity light flashes possible. With corresponding lamps, however, longer illumination times may be achieved in the range of the lower initial frequencies, which ~ ~6S~10 times become shorter with increasin~ flashing frequencies.
One embodiment of an apparatus suitable for carrying out the process of the present invention is illustrated in the drawings in which:
Fig. L shows a Light source with a control unit and a power supply; and Fig. 2 shows an advantageous instaLlation of the light source on an aircraft.
As shown in Fig. 1, light source L comprises a reflector 2 and a discharge tube 3, which are accommodated in a housing 4, which is shaped in an aerodynamically favourable manner. On its fo~ward side, housing 4 may be sealed with a glass disc 5 positioned obliquely to the direction of flight.
This may be heated to ensure the penetration of the full intensity of light.
One side of housing 4 is substantially flat. This ma~es it possible to A subsequently attach the apparatus below and on a ~ ing-s~rface of the aircraft. Discharge tube 3 may be energized by power supply 6, in which a condensor is continuousLy charged with current from the onboard power supply.
The discharge tube 3 is controlled by control unit 7 which comprises a microprocessor, in which various flashing frequencies and cycle durations are stored. The programmed frequencies and cycle durations may be individually seLected by means of a program selector switch 8. The process may be activated by means of a simple on/off switch ~, an~ deactivated in the same way, as shown in Fig. 1. Control lamp 10 lights up when the device is in operation.
Fig. 2 shows the possibLe and advantageous installation placement of two light sources 1 on the s~ppor ~ ~r-~aee 11 of an,aircraft 12. The light . sources are located on the lower side 14 of ~pp~ ~ ~uFf-a~e-11, near engines 13, which are particularly endangered. In that location, airflow over the profile of the wing is not impaired, and the lift is therefore not reduced, or only minimally reduced.
The process of the present invention may be initiated by means of varlous release circuits. In the simplest manner, this occurs when the pilot activates control unit 7 by means of a separate switch 9. He genarally does so immediately before taxiing out and before the throttle is pushed forward.
As soon as he judges the ascent to be adequate, he again deactivates the apparatus. By means of this switching device, it is also possible for the pilot to activate the bird-alarming lights, which may be referred to as "ABC
1265~
lights" (Anti-bird Collision lights), according to his own best judgment in any situation, even in flight and particularly during take off and landing.
Other s~itch means may be specially provided for automatically switching on and off the ABC lights. For example, the control unit may be switched on and off by a switching relay 15, which may be controlled by means of an on-board, acceleration-sensitve device 16. As soon as the acceleration-sensitive device 16 registers that a certain acceleration value has been exceeded, it activates the relay 15 which then activates the control unit. A timing means then ensures that the relay, after a predetermined time, deactivates the control unit. According to another embodiment, the ABC lights may be controlled by means of a special radar system which responds to birds in the danger zone, and then, by means of a switching relay, automatically activates the ABC lights as soon as birds are detected. The ABC lights then remain on until the radar no longer detects any birds in the danger zone.
~ .
~ .
The light source itself preferably comprises a discharge Lamp, which produces a very dazzling and rapidly flashing light, which is particularly well suited for the execution of the process of the present invention. This discharge lamp may be provided with current by means of an onboard power system and may be controlled by means of a special control unit in the form of a microprocessor. Various cycles and frequencies may be programmed into its storage memory and may then be individually recalled by making a corresponding program selection. Cycles and flashing frequencies are thereby available and can be selected for the types of birds which need to be scared away, and the speeds of the corresponding types of aircraft. The illumination time of each flash is preferably short to produce the most dazzling high intensity light flashes possible. With corresponding lamps, however, longer illumination times may be achieved in the range of the lower initial frequencies, which ~ ~6S~10 times become shorter with increasin~ flashing frequencies.
One embodiment of an apparatus suitable for carrying out the process of the present invention is illustrated in the drawings in which:
Fig. L shows a Light source with a control unit and a power supply; and Fig. 2 shows an advantageous instaLlation of the light source on an aircraft.
As shown in Fig. 1, light source L comprises a reflector 2 and a discharge tube 3, which are accommodated in a housing 4, which is shaped in an aerodynamically favourable manner. On its fo~ward side, housing 4 may be sealed with a glass disc 5 positioned obliquely to the direction of flight.
This may be heated to ensure the penetration of the full intensity of light.
One side of housing 4 is substantially flat. This ma~es it possible to A subsequently attach the apparatus below and on a ~ ing-s~rface of the aircraft. Discharge tube 3 may be energized by power supply 6, in which a condensor is continuousLy charged with current from the onboard power supply.
The discharge tube 3 is controlled by control unit 7 which comprises a microprocessor, in which various flashing frequencies and cycle durations are stored. The programmed frequencies and cycle durations may be individually seLected by means of a program selector switch 8. The process may be activated by means of a simple on/off switch ~, an~ deactivated in the same way, as shown in Fig. 1. Control lamp 10 lights up when the device is in operation.
Fig. 2 shows the possibLe and advantageous installation placement of two light sources 1 on the s~ppor ~ ~r-~aee 11 of an,aircraft 12. The light . sources are located on the lower side 14 of ~pp~ ~ ~uFf-a~e-11, near engines 13, which are particularly endangered. In that location, airflow over the profile of the wing is not impaired, and the lift is therefore not reduced, or only minimally reduced.
The process of the present invention may be initiated by means of varlous release circuits. In the simplest manner, this occurs when the pilot activates control unit 7 by means of a separate switch 9. He genarally does so immediately before taxiing out and before the throttle is pushed forward.
As soon as he judges the ascent to be adequate, he again deactivates the apparatus. By means of this switching device, it is also possible for the pilot to activate the bird-alarming lights, which may be referred to as "ABC
1265~
lights" (Anti-bird Collision lights), according to his own best judgment in any situation, even in flight and particularly during take off and landing.
Other s~itch means may be specially provided for automatically switching on and off the ABC lights. For example, the control unit may be switched on and off by a switching relay 15, which may be controlled by means of an on-board, acceleration-sensitve device 16. As soon as the acceleration-sensitive device 16 registers that a certain acceleration value has been exceeded, it activates the relay 15 which then activates the control unit. A timing means then ensures that the relay, after a predetermined time, deactivates the control unit. According to another embodiment, the ABC lights may be controlled by means of a special radar system which responds to birds in the danger zone, and then, by means of a switching relay, automatically activates the ABC lights as soon as birds are detected. The ABC lights then remain on until the radar no longer detects any birds in the danger zone.
~ .
~ .
Claims (16)
IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for preventing bird collisions with aircraft during the take-off and landing phases of the aircraft and during flight by means of providing at least one light source on the airplane, said light source producing light flashes during at least one cycle, characterized in that the frequency of said light flashes produced is continuously increased during said at least one cycle.
2. A process in accordance with Claim 1, characterized in that the frequency of said light flashes during each said cycle is continuously increased from a minimum of about 0.1 Hz to a maximum of about 3.0 Hz, and each said cycle has a duration of about 10 seconds to about 40 seconds.
3. A process in accordance with Claim 2, characterized in that said light source is activated for a plurality of cycles, said light source remains activated after the last said cycle, and said frequency of said light flashes after termination of the last said cycle is maintained at the maximum frequency of the last said cycle.
4. A process in accordance with Claim 2, characterized in that said light source is activated for a single said cycle.
5. A process in accordance with Claim 2, characterized in that said light source is activated for a plurality of said cycles.
6. A process in accordance with Claim 1, characterized in that said light source is activated for a plurality of cycles, said light source remains activated after the last said cycle, and said frequency of said light flashes after termination of the last said cycle is maintained at the maximum frequency of the last said cycle.
7. A process in accordance with Claim 1, characterized in that said light source is activated for a single said cycle.
8. A process in accordance with Claim 1, characterized in that said light source is activated for a plurality of said cycles.
9. An apparatus for preventing bird collisions with aircraft during the take-off and landing phases of the aircraft and during flight, said apparatus comprising a light source, a control unit comprising a microprocessor having a programmable memory means storing a plurality of preset programs, said control unit activating said light source during at least one cycle and producing light flashes at continuously increasing frequencies according to said preset programs, and a program selection means for individually selecting a preset program to activate said light source according to a preset cycle time and flashing frequency.
10. An apparatus in accordance with Claim 9, additionally comprising an aerodynamically shaped housing accommodating said light source, said housing comprising an integrated unit for installation on said aircraft.
11. An apparatus in accordance with Claim 10, additionally comprising a separate switch means in communication with said control unit provided in the cockpit of said aircraft for activating said control unit.
12. An apparatus in accordance with Claim 11, additionally comprising a switching relay means in communication with said control unit, said switching relay means responsive to an on-board acceleration-sensitive device for activating said control unit, and a timing means in communication with said switch relay means for deactivating said control unit, after a predetermined time has elapsed.
13. An apparatus in accordance with Claim 12, additionally comprising an on-board radar system in communication with said control unit, said on-board radar system responsive to the presence of birds within a defined collision danger zone to automatically activate and operate said light source according to a preset program as long as said radar system detects the presence of birds in said defined collision danger zone.
14. An apparatus in accordance with Claim 9, additionally comprising a separate switch means in communication with said control unit provided in the cockpit of said aircraft for activating said control unit.
15. An apparatus for preventing bird collisions with aircraft during the take-off and landing phases of the aircraft and during flight, said apparatus comprising a light source, a control unit comprising a microprocessor having programmable memory means storing a plurality of preset programs, a switching relay means in communication with said control unit, said switching relay means responsive to an on-board acceleration-sensitive device to activate said control unit, thereby activating said light source during cycles of varying duration and producing light flashes of variable frequencies according to said preset programs, a timing means in communication with said switching relay means for deactivating said control unit after a predetermined time has elapsed, and a program selection means for individually slecting a preset program to activate said light source according to a preset cycle time and flashing frequency.
16. An apparatus for preventing bird collisions with aircraft during the take-off and landing phases of the aircraft and during flight, said apparatus comprising a light source, a control unit comprising a microprocessor having programmable memory means storing a plurality of preset programs, said control unit activating said light source during cycles of varying duration and producing light flashes of variable frequencies according to said preset programs, an onboard radar system in communication with said control unit, said on-board radar system responsive to the presence of birds within a defined collision danger zone to automatically activate and operate said light source according to a present program as long as said radar system detects the presence of birds in said defined collision danger zone, and a program selection means for individually selecting a preset program to activate said light source according to a preset cycle time and flashing frequency.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH880/86-4 | 1986-03-04 | ||
| CH880/86A CH669162A5 (en) | 1986-03-04 | 1986-03-04 | METHOD AND DEVICE FOR PREVENTING BIRD SHOCK. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1265110A true CA1265110A (en) | 1990-01-30 |
Family
ID=4197328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000530672A Expired CA1265110A (en) | 1986-03-04 | 1987-02-26 | Process and apparatus for preventing bird collisions |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4736907A (en) |
| EP (1) | EP0236267B1 (en) |
| JP (1) | JP2755575B2 (en) |
| AU (1) | AU584565B2 (en) |
| BR (1) | BR8700945A (en) |
| CA (1) | CA1265110A (en) |
| CH (1) | CH669162A5 (en) |
| DE (1) | DE3766724D1 (en) |
| ES (1) | ES2018849B3 (en) |
| GR (1) | GR3001215T3 (en) |
| IL (1) | IL81612A0 (en) |
| SU (1) | SU1722223A3 (en) |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4964331A (en) * | 1988-12-29 | 1990-10-23 | Eyal Halevy | Airborne birdstrike prevention device |
| DE4029204A1 (en) * | 1990-09-14 | 1992-03-19 | Hella Kg Hueck & Co | METHOD AND DEVICE FOR AVOIDING PLANE COLLISIONS |
| DE4029206A1 (en) * | 1990-09-14 | 1992-03-19 | Hella Kg Hueck & Co | METHOD AND DEVICE FOR PREVENTING BIRD SHOCK ON PLANES |
| DE4029205A1 (en) * | 1990-09-14 | 1992-03-19 | Hella Kg Hueck & Co | METHOD AND DEVICE FOR AVOIDING BIRD SHOCK ON PLANES |
| US5189344A (en) * | 1991-05-03 | 1993-02-23 | Public Safety Equipment, Inc. | Solid state strobe tube control circuit with programmable flash pattern |
| US5450063A (en) * | 1993-10-18 | 1995-09-12 | Peregrine, Inc. | Bird avert system |
| US5774088A (en) * | 1994-07-26 | 1998-06-30 | The University Of Pittsburgh | Method and system for warning birds of hazards |
| US5588251A (en) * | 1995-02-10 | 1996-12-31 | Young; Sam W. | Device for the prevention of collisions of birds with transparent barriers |
| US6575597B1 (en) * | 1995-08-23 | 2003-06-10 | Science & Engineering Associates, Inc. | Non-lethal visual bird dispersal system |
| US6793364B2 (en) | 1995-08-23 | 2004-09-21 | Science & Engineering Associates, Inc. | Non-lethal visual bird dispersal system |
| US6351908B1 (en) * | 1999-08-03 | 2002-03-05 | James Wendell Thomas | Automated deer scarecrow |
| US6940424B2 (en) * | 2001-11-13 | 2005-09-06 | Precise Flight, Inc. | Hazard avoidance system |
| US6690265B2 (en) * | 2001-12-04 | 2004-02-10 | The United States Of America As Represented By The Department Of The Interior | Infrasound hazard-warning method and device for alerting night-migrating birds to obstacles |
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| US2876388A (en) * | 1956-11-21 | 1959-03-03 | Burroughs Corp | Aircraft warning devices |
| US3903501A (en) * | 1969-12-31 | 1975-09-02 | Grimes Manufacturing Co | Aircraft lighting system |
| US3735115A (en) * | 1972-03-16 | 1973-05-22 | C Adler | Streamlined gas discharge anticollision beacon |
| FR2227993A1 (en) * | 1973-05-04 | 1974-11-29 | Laty Marc | Bird scarer using dual frequency laser beam - has rotating generator to provide conical beam |
| US3925704A (en) * | 1974-10-24 | 1975-12-09 | Hughey And Phillips | Lighting system with variable flashing rate |
| JPS5541046U (en) * | 1978-09-12 | 1980-03-17 | ||
| NL7908857A (en) * | 1979-12-10 | 1981-07-01 | Johan Oosterink | Preventing bird strike of aircraft on take=off and landing - by bird-repelling signals triggered along runway by approaching aircraft |
| US4477796A (en) * | 1982-09-29 | 1984-10-16 | Kearsley Wayne A | Spatial acquisition flash beacon |
-
1986
- 1986-03-04 CH CH880/86A patent/CH669162A5/en not_active IP Right Cessation
-
1987
- 1987-02-11 US US07/013,413 patent/US4736907A/en not_active Expired - Lifetime
- 1987-02-16 EP EP87810093A patent/EP0236267B1/en not_active Expired - Lifetime
- 1987-02-16 DE DE8787810093T patent/DE3766724D1/en not_active Expired - Lifetime
- 1987-02-16 ES ES87810093T patent/ES2018849B3/en not_active Expired - Lifetime
- 1987-02-17 AU AU68867/87A patent/AU584565B2/en not_active Ceased
- 1987-02-18 IL IL81612A patent/IL81612A0/en not_active IP Right Cessation
- 1987-02-26 CA CA000530672A patent/CA1265110A/en not_active Expired
- 1987-02-26 BR BR8700945A patent/BR8700945A/en not_active IP Right Cessation
- 1987-03-03 SU SU874202140A patent/SU1722223A3/en active
- 1987-03-03 JP JP62048636A patent/JP2755575B2/en not_active Expired - Lifetime
-
1990
- 1990-12-20 GR GR90400582T patent/GR3001215T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3766724D1 (en) | 1991-01-31 |
| BR8700945A (en) | 1987-12-29 |
| AU584565B2 (en) | 1989-05-25 |
| JP2755575B2 (en) | 1998-05-20 |
| EP0236267A3 (en) | 1989-04-12 |
| ES2018849B3 (en) | 1991-05-16 |
| AU6886787A (en) | 1987-09-10 |
| EP0236267B1 (en) | 1990-12-19 |
| US4736907A (en) | 1988-04-12 |
| GR3001215T3 (en) | 1992-07-30 |
| JPS62210199A (en) | 1987-09-16 |
| IL81612A0 (en) | 1987-09-16 |
| CH669162A5 (en) | 1989-02-28 |
| SU1722223A3 (en) | 1992-03-23 |
| EP0236267A2 (en) | 1987-09-09 |
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| Date | Code | Title | Description |
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| MKLA | Lapsed |