JP2612410B2 - Recessed air traffic sign light - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recessed type air traffic sign installed along a taxiway for guiding an aircraft or the like at an airport or the like, and more particularly, to an embedded traffic light having a function of detecting an aircraft or the like passing thereover. It relates to a self-contained air traffic sign.

[0002]

2. Description of the Related Art Generally, a taxiway for guiding an aircraft or the like is formed at an airport or the like. The taxiway is provided with a recessed air traffic sign at a predetermined location. The recessed-type aeronautical traffic lights give instructions such as stopping and proceeding to an aircraft or the like moving on a taxiway by turning on and off the lights.

By the way, in such a taxi way, a plurality of aircrafts and the like travel sequentially on the taxi way. Here, a collision between the aircrafts and the like traveling on the taxi way is described. Prevention is a major issue.

Therefore, conventionally, a stop lamp (embedded air traffic sign light) is provided at a predetermined interval on a taxi way, and a plurality of persons directly or a camera can drive an aircraft or the like traveling on the taxi way. The stop lamp is turned on and off so that the distance between the aircraft and the like can be maintained at a safe distance.

[0005]

However, in general, the length of a taxiway is quite long, and a large number of observers are required to monitor the taxiway. There was a possibility that an accident would occur.

In order to solve this problem, a method of optically or mechanically detecting passage of an aircraft or the like on a taxiway can be considered. In this case, it is necessary to newly provide a plurality of facilities protruding from the ground surface. At present, there is no appropriate countermeasure that can be adopted because of the special circumstances from the viewpoint of cost and the safety of running such as aircraft that we do not want to provide as much equipment protruding from the surface as possible near the taxi way. It is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a recessed-type aeronautical traffic light with a function of detecting an aircraft traveling on a taxiway.

[0008]

In order to achieve the above object, the present invention relates to a recessed-type aeronautical traffic light which has a built-in traffic light and is buried on the ground along a taxiway for guiding an aircraft or the like. A first vibration sensor whose sensitivity direction coincides with the direction perpendicular to the guidance direction of the aircraft, a second vibration sensor whose sensitivity direction coincides with the guidance direction of the aircraft, and the first vibration sensor. Determining means for determining the passage of the aircraft or the like based on the output and the output of the second vibration sensor.

[0009]

According to the present invention, the sensitivity direction is made to coincide with a direction perpendicular to the direction of guidance of an aircraft or the like by a recessed type air traffic sign buried on the ground surface along the taxiway for guiding the aircraft.
And a second vibration sensor whose sensitivity direction is made to coincide with the guidance direction of an aircraft or the like, and determines passage of the aircraft or the like based on the output of the first vibration sensor and the output of the second vibration sensor. Is determined.

Here, as the first vibration sensor and the second vibration sensor, for example, those using a plastic piezoelectric body for the detecting portion can be used, and the discriminating means uses the output of the first vibration sensor. When the output falls below the first threshold level and the output of the second vibration sensor rises above the second threshold level, it is determined that an aircraft or the like has passed. Also, the first threshold level is set to a value smaller than the second threshold level.

The discriminating means compares the output of the first vibration sensor with the first threshold level, and compares the output of the second vibration sensor with the second threshold level. It can be constituted by a second comparing means and an AND means for calculating an AND condition of the output of the first comparing means and the second comparing means.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an embedded type traffic sign light according to the present invention.

FIG. 1 conceptually shows one embodiment of an embedded type traffic sign lamp according to the present invention. FIG. 1 (a) is a side view, and FIG. 1 (b) is FIG. 1 (a). It is AA sectional drawing of.
The recessed aerial signpost is arranged along a taxiway (not shown) for guiding an aircraft or the like at an airport or the like, and the guidance direction of the aircraft or the like is set in the direction of arrow Y shown in FIG. .

Referring to FIG. 1, a recessed aerial sign lamp of this embodiment has a lamp portion 11 detachably mounted on an upper portion of a main body portion 10, and a part of the lamp portion 11 slightly protrudes from the ground surface GL. The other part is buried under the ground surface GL. A lamp chamber 11a is formed inside the lamp section 11, and a lamp 11b is accommodated in the lamp chamber 11a. The lamp 11b is made of, for example, a tungsten halogen light bulb, and functions as an aeronautical beacon light for giving predetermined information to an aircraft or the like on a taxiway by turning on or off.

The lamp 11b of the lamp section 11 is supplied with power via a power line cable provided in a conduit 30 provided below the recessed-type aerial traffic light.

A heat insulating portion 11c is provided below the lamp portion 11, and a transformer housing portion 12 for housing a transformer (not shown) is provided below the heat insulating portion 11c. Further, two vibration sensors 13a and 13b are arranged on the lower surface 12a of the transformer housing 12. Here, the vibration sensor 13a is disposed so that its sensitivity direction coincides with a direction perpendicular to the guidance direction such as an aircraft traveling on a taxiway, and the vibration sensor 13b is arranged such that its sensitivity direction is an aircraft traveling on the taxiway. They are arranged so as to coincide with the equal guiding directions. Further, as the vibration sensors 13a and 13b, those constituted by using a plastic piezoelectric body for the detection unit can be used.

FIG. 2 shows sensitivity-frequency characteristics of the vibration sensors 13a and 13b. That is, it is known that the vibration sensors 13a and 13b each exhibit a sensitivity-frequency characteristic as shown by a curve b in the sensitivity direction, and exhibit a sensitivity-frequency characteristic as shown by a curve a in the insensitive direction. .

Therefore, as shown in FIG. 1, a vibration sensor 13a is provided inside the recessed type air traffic sign so that its sensitivity direction coincides with the direction perpendicular to the guidance direction of an aircraft traveling on a taxiway. And the vibration sensor 13b is arranged so that its sensitivity direction coincides with the guidance direction of an aircraft traveling on a taxiway, and passes an aircraft or the like thereover. In this case, the vibration sensor 13a and the vibration sensor When the output of 13b, that is, the sensitivity is measured, the result is as shown in FIG.

That is, the output of the vibration sensor 13a arranged so that its sensitivity direction coincides with the direction perpendicular to the guidance direction of an aircraft traveling on a taxiway, for example, is the distance between the aircraft or the like and this embedded type aerial traffic light. If the aircraft, etc. approach this recessed traffic light, the value will decrease, and the value will be the minimum value when the aircraft, etc. comes directly above the recessed traffic light. The value increases as the aircraft or the like moves away from the embedded air-conditioning sign light, and returns to its original value, that is, a constant value. The output of the vibration sensor 13a is shown by a curve A in FIG.

The output of the vibration sensor 13b arranged so that its sensitivity direction coincides with the direction of guidance of an aircraft traveling on a taxiway is output when the embedded aircraft is separated from the aircraft or the like. It takes the minimum value, but increases as aircraft, etc. approach this recessed traffic light, and reaches its maximum value when the aircraft, etc., comes directly above this recessed traffic light, and The value decreases as the distance from the embeddable signpost increases, and returns to its original value, that is, the minimum value. The output of the vibration sensor 13b is shown by a curve B in FIG.

In the present invention, the passage of an aircraft or the like over an embedded air traffic sign is detected using the output characteristics of the vibration sensors 13a and 13b shown in FIG.

That is, as shown in FIG. 3, a first threshold level SH is applied to the output of the vibration sensor 13a.
is set, and a second threshold level SHb is set for the output of the vibration sensor 13b. Then, the output of the vibration sensor 13a and the first threshold level SHA
And the output of the vibration sensor 13b is compared with the second threshold level SHb.
When the output of a falls below the first threshold level SHa and the output of the vibration sensor 13b rises above the second threshold level SHb, it is determined that an aircraft or the like has passed over the embedded type air traffic sign. I do.

FIG. 4 shows an example of a discriminating circuit for discriminating the passage of an aircraft or the like from the outputs of the vibration sensors 13a and 13b. This discriminating circuit includes two comparators 1
4a and 14b and one AND circuit 15.
The comparator 14a has its minus input receiving the output of the vibration sensor 13a and its plus input receiving a voltage signal corresponding to the first threshold level SHA. A voltage signal corresponding to the second threshold level SHb is input to the negative input of the comparator 14b, and the second vibration sensor 13 is input to the positive input of the comparator 14b.
The output of b is input.

Here, when an aircraft or the like approaches the position where the recessed type air traffic sign is provided and the output of the vibration sensor 13a falls below the first threshold level SHA, the comparator 14a outputs a high level signal. I do. At this time, the output of the vibration sensor 13b rises above the second threshold level SHb, and the comparator 14b also outputs a high-level signal. The high-level signal output from the comparator 14a and the comparator 14b
Is output to the AND circuit 15. As a result, a high-level signal is output from the AND circuit 15. The passage of an aircraft or the like can be determined based on the high-level signal output from the AND circuit 15.

FIG. 5 shows an example of a taxiway control system constituted by using the recessed type aerial signpost shown in FIG. In this taxi way control system, n embedded air traffic sign lights are arranged in a taxi way (not shown), and the n embedded air traffic sign lights are controlled by the center device 20. That is, the center device 20
Is a vibration sensor 13a-1 in each of the recessed aerial sign lights.
13a-n and 13b-1 to 13b-n, based on the information about the passage of the aircraft and the like, based on the information on the passage of the aircraft and the like on the taxi way, by controlling the lighting of each embedded type air traffic sign A driving instruction is given to an aircraft or the like traveling on the taxi way. Also, the center device 20
Is a disconnection detection relay 1 provided in each recessed aerial traffic light.
5-1 to 15-n relay contacts 15a-1 to 15a-n
Detects and manages the core breakage of each recessed aerial signage light based on the output of.

In the configuration shown in FIG. 5, each of the recessed aerial beacon lights is connected to the center device 20 via a power line 36.
Electric power is supplied via 6-1 to 16-n. In addition, transmission of information from each of the embedded air traffic sign lights to the center device 20 and transmission of control information from the center device 20 to each of the embedded air traffic sign lights are performed by the transformers 16-1 to 16-n and the power line 36. Is transmitted by power line communication via the Internet.

Each of the recessed aerial signposts is a lamp 11b-1.
11b-n, 15b-1 to 15-n for detecting the disconnection of the lamps 11b-1 to 11b-n, and the relay contact 15a- of the disconnection detection relays 15-1 to 15-n.
1-15a-n, vibration sensors 13a-1-13a-n and 13b-1-13b-n, power line communication modems 14-1-1 for performing power line communication with the center device 20.
4-n, batteries 19-1 to 19-n for backing up the power line communication modems 14-1 to 14-n.

The vibration sensors 13a-1 to 13a-n and 13b-1 to 13b-n
The information on the passage of an aircraft or the like detected by the power line communication modems 14-1 to 14-n is transmitted by the power line communication modems 14-1 to 14-n.
1 to 16-n are transmitted to the center device 20 via the power line 36 by power line communication, and the center device 20 determines the position of the aircraft or the like on the taxiway based on this information.

In each of the recessed aerial traffic lights, when the lamps 11b-1b to 11-n are disconnected, the disconnection detection relays 15-1 to 15-n operate, and the relay contacts 15-1 to 15-n operate.
a-1 to 15a-n are turned on. This relay contact 15
The information indicating the on-operations of a-1 to 15a-n is transmitted from the power line communication modems 14-1 to 14-n as lamp disconnection information via the transformers 16-1 to 16-n and the power line 36 to the center device 20. Is transmitted by power line communication. The center device 20 detects and manages the disconnection of each of the recessed aerial sign lights based on the lamp disconnection information.

FIG. 6 shows another example of a taxi way control system constituted by using the recessed type air traffic sign light shown in FIG. In this taxiway control system, each of the recessed type air traffic sign lights is controlled via the relay unit RE.

In the configuration shown in FIG. 6, the relay section RE is connected to the lamps 11b-1 to 11b-1 of the respective recessed aerial sign lights from the power line 36.
Transformer 3 for extracting power for driving 1-n
4. Terminal control unit 17-1 for each recessed air traffic sign light
A transformer 35 and a DC power supply circuit 31 for taking out a DC power supply for driving 17-n, a modem 32 for transmitting and receiving information between each of the embedded type air traffic sign lights and the center device 20, A control unit 33 for controlling the self-contained air traffic sign light is provided.

Further, each of the recessed aeronautical traffic lights is connected to terminals T1 to T
n, and each terminal T1 to Tn is connected to a lamp 11b.
-1 to 11b-n, disconnection detection relays 15-1 to 15- for detecting disconnection of the lamps 11b-1 to 11b-n.
n, relay contact 1 of disconnection detection relays 15-1 to 15-n
5a-1 to 15a-n, vibration sensors 13a-1 to 13a
-N and 13b-1 to 13b-n, terminal control units 17-1 to 17-1 for communicating with the center device 20
7-n, and a terminal resistor 18 for terminating the communication line L is provided at the terminal Tn at the final end.

In the configuration shown in FIG.
n vibration sensors 13a-1 to 13a-n and 13b-
Information about passage of an aircraft or the like detected by 1 to 13b-n is sent to the center device 20 by the terminal control units 17-1 to 17-n via the communication line L, the control unit 33 of the relay unit RE, and the modem 32. The center device 20 determines the position of the aircraft or the like on the taxiway based on this information.

Further, in each of the terminals T1 to Tn, when the lamp 11b-1b to 11-n is disconnected, the disconnection detection relays 15-1 to 15-n operate and their relay contacts 15a
-1 to 15a-n are turned on. This relay contact 15a
Information indicating the ON operation of -1 to 15a-n is transmitted to the terminal control units 17-1 to 17-n as lamp disconnection information via the communication line L, the control unit 33 of the relay unit RE, and the modem 32. Transmitted to the device 20. The center device 20 detects and manages the disconnection of each of the terminals T1 to Tn based on the lamp disconnection information.

In the above embodiment, the information is transmitted using the communication line L. However, the information may be transmitted by the power line using the power line.

[0036]

As described above, according to the present invention,
Since it is configured to detect an aircraft passing above using two vibration sensors, it is possible to detect an aircraft traveling on a taxiway without providing special equipment protruding from the ground surface, and this detection output is obtained. By using
There is an effect that a collision between aircrafts traveling on the taxi way can be prevented beforehand without arranging a large number of supervisors.

[Brief description of the drawings]

FIG. 1 is a diagram conceptually showing one embodiment of an embedded type air traffic sign light according to the present invention.

FIG. 2 is a diagram illustrating sensitivity-frequency characteristics of a vibration sensor.

FIG. 3 is a diagram showing a principle of detecting passage of an aircraft or the like using the two vibration sensors shown in FIG. 1;

FIG. 4 is a circuit diagram illustrating an example of a determination circuit that determines the passage of an aircraft or the like using the two vibration sensors illustrated in FIG. 1;

FIG. 5 is a block diagram showing an example of a taxiway control system configured using the recessed type air traffic sign light shown in FIG.

FIG. 6 is a block diagram showing another example of a taxiway control system configured by using the embedded air traffic sign light shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Recessed type | mold airline sign light main part 11 Lamp part 11a Lamp room 11b Lamp 11c Heat insulation part 12 Transformer storage part 12a Lower surface 13a, 13b Vibration sensor 14a, 14b Comparator 14-1-14-n Power line modem 15 AND circuit 15-1 15-n Disconnection detection relay 15a-1 to 15a-n Relay contact 16-1 to 16-n Transformer 17-1 to 17-n Terminal control unit 18 Termination resistor 19-1 to 19-n Battery 20 Center device 30 Conduit 31 DC power supply circuit 32 Modem 33 Control unit 34 Transformer 35 Transformer 36 Power line RE Relay unit T1 to Tn Terminal L Communication line

Claims (5)

(57) [Claims] 1. An embedded aerial sign lamp having a built-in sign lamp and buried on the ground surface along a taxiway for guiding an aircraft or the like, wherein a sensitivity direction is made to coincide with a direction perpendicular to a guiding direction of the aircraft or the like. A first vibration sensor, a second vibration sensor whose sensitivity direction matches the guidance direction of the aircraft or the like, the aircraft or the like based on the output of the first vibration sensor and the output of the second vibration sensor. And a discriminating means for discriminating the passage of a traffic light. 2. The recessed aeronautical traffic light according to claim 1, wherein the first vibration sensor and the second vibration sensor are configured by using a plastic piezoelectric body for a detection unit. 3. The method according to claim 1, wherein the output of the first vibration sensor drops below a first threshold level and the output of the second vibration sensor rises above a second threshold level. 2. The recessed aeronautical traffic light according to claim 1, wherein it is determined that the vehicle has passed the aircraft or the like. 4. The embedded air traffic sign light according to claim 3, wherein said first threshold level is set to a value smaller than said second threshold level. 5. The determination means includes: first comparison means for comparing an output of the first vibration sensor with a first threshold level; and an output of the second vibration sensor and a second threshold level. 4. An embedding device according to claim 3, further comprising: second comparing means for comparing the first and second comparing means; and ANDing means for calculating an AND condition of the output of the first comparing means and the second comparing means. Built-in air traffic sign light.