WO1993014480A1

WO1993014480A1 - Sensor for detecting aircraft

Info

Publication number: WO1993014480A1
Application number: PCT/JP1993/000011
Authority: WO
Inventors: Shinzo Akitaya; Katuyuki Ueda; Tetsuo Satoh; Kouji Mineo
Original assignee: Kabushiki Kaisha Toshiba; Toshiba Electronic Systems Co., Ltd.
Priority date: 1992-01-10
Filing date: 1993-01-08
Publication date: 1993-07-22
Also published as: JPH05185996A; SE9302900L; SE9302900D0

Abstract

A sensor having transmitting and receiving apparatuses (10 and 20) facing each other with at least one of a taxiway and a runway interposed. Each of the transmitting and receiving apparatuses is provided with a transmitter (102, 202) for transmitting laser beam signals which carry coded data, and a receiver (103, 203) for receiving laser beam signals transmitted from the transmitting means of the other transmitting and receiving apparatus. When the receivers recognize that the coded data of the laser beam signals are correct, the receivers output a detection signal representing that no aircraft is present in a predetermined place at least in one of the taxiway and runway.

Description

Specification

Aircraft position sensor device

Technical field

The present invention relates to an aircraft position sensor device used to detect whether or not an aircraft exists on a taxiway or a runway, and particularly to the technology for detecting the presence or absence of an aircraft with high accuracy. It relates to an aircraft position sensor device.

Background art

Category 3 of the international standard of ICA 0 (International Civil Aviation on Organization) requires improvement of facilities so that airports can be operated even if visibility is poor. Airport facilities are being improved. An aircraft position sensor device has been developed and put into practical use as a facility improvement. As a specific example of this type of aircraft position sensor device, an aircraft position sensor device currently used in the United Kingdom, Germany, and the like, has a large number of loop coils in the basement directly below it along the taxiway. The loop coils are buried at a predetermined interval, and a predetermined low-frequency current flows through each of these loop coils. When an aircraft (metal object) approaches the buried loop coil in this state, the inductance of the loop coil changes, and the change in the inductance detects the passage of the aircraft.

However, when burying a large number of loop coils at the existing airport, it is necessary to stop the operation, and this poses many problems in terms of construction. Also, if the sensor device composed of this loop coil breaks down, the operation of the aircraft will be impeded, There is difficulty in terms of sex. Furthermore, there is a problem that the cost is relatively high and the detection ability is lowered when snow is accumulated.

By the way, Japan is currently in the stage of studying whether or not to introduce this type of aircraft position sensor device, including loop coil system, ultrasonic system, engine sound detection system, infrared system, and photoelectric system. Systems, laser radar systems, etc. are increasing as weather catchers, but when all are considered in terms of detection performance, workability, maintainability, compatibility with airports, all-weatherability, price, etc., all of these requirements are met. A detection method that satisfies is not yet found.

An object of the present invention is to provide an aircraft position sensor device capable of sufficiently satisfying various requirements at an airport and capable of highly accurately detecting the presence or absence of an aircraft while sufficiently considering noise measures. And

Disclosure of the invention

According to one aspect of the present invention, a transmitter for transmitting a laser beam signal having coded data (sensor number), and a laser beam signal of coded data transmitted from the transmitter A receiver that receives the laser beam signal of coded data is installed so as to face a predetermined position on one or both of the taxiway and the runway. Aircraft position sensor device that outputs a detection signal indicating that the aircraft is not present at a predetermined position on the taxiway or runway from

According to another aspect of the present invention, instead of a laser beam signal having coded data, on / off is performed at regular intervals. An aircraft position sensor device for detecting the presence or absence of an aircraft using a laser beam signal having a predetermined frequency that is repeated is provided. Further, according to another aspect of the present invention, the coded data includes: An aircraft position sensor device that detects the presence or absence of an aircraft while confirming the appropriateness of data using a laser beam signal is provided.

Further, according to another aspect of the present invention, there is provided an aircraft position sensor device for detecting the presence or absence of an aircraft using a laser beam signal of a predetermined wavelength instead of a signal.

According to the present invention, a transmitter for transmitting a laser beam signal and a receiver for receiving a laser beam signal are provided so as to face a predetermined position on one or both of a taxiway and a runway. The operation of the aircraft is not hindered when the sensor device fails. In addition, the transmitter transmits coded data, that is, a laser beam signal having a sensor number, while the receiver determines whether a laser beam signal having a required sensor number has been received. When a signal is being received, a detection signal indicating that the aircraft is not present is output, so not only is it strong against noise, but also when a laser beam signal comes The presence or absence of an aircraft can be detected with high accuracy.

In addition, by transmitting and receiving a laser beam signal of a predetermined frequency that is repeatedly turned on and off at regular intervals, the operation of the aircraft is not hindered at the time of application and in the event of a sensor device failure, as described above. Is not only strong, but also It is possible to reliably determine whether or not a laser beam signal is coming from a sensor, and to detect the presence or absence of an aircraft with high accuracy.Additionally, by adding a check code to the coded data, By transmitting and receiving laser beam signals, it is possible to detect the presence or absence of an aircraft while checking the reliability of data, and to obtain detection signals with extremely high accuracy.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a schematic diagram of the airport.

FIG. 2 is a block circuit diagram of the aircraft position sensor device according to one embodiment of the present invention.

FIG. 3 is an external view of one of a transmitter and a receiver constituting the aircraft position sensor device according to the present invention.

FIG. 4 is a diagram for explaining the operation of the aircraft position sensor device.

FIG. 5 is a block circuit diagram of an aircraft position sensor device according to another embodiment that emits a laser beam at a constant period.

FIG. 6 is a diagram for explaining the operation of the aircraft position sensor device of FIG.

Fig. 7 is a block diagram of an aircraft position sensor device that transmits a laser beam signal with a check code added.

FIG. 8 is a diagram for explaining the operation of the aircraft position sensor device of FIG.

FIG. 9 is a block circuit diagram of an aircraft position sensor device according to another embodiment that emits a laser beam having a predetermined wavelength.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 is a diagram schematically showing the state of the airport. Generally, an airport has a plurality of taxiways A 1, A 2, ... for guiding aircraft, and a runway B for takeoff of aircraft. Of these, each taxiway A l, A 2, … Includes stop bar lamps C 1, C 2,… to indicate a temporary stop of the aircraft, and taxi way center lights to direct the guidance of the aircraft. amps) D 1, D 2,… are installed, and a taxiway center light E l, Ε 2,… is installed on runway Β to instruct the aircraft to enter the runway Β .

At the airport, when the aircraft approaches taxiway A1, for example, along taxiway center light D1 and approaches stopba light C1, the controller turns on stopbar light C1 green. Turn on the taxiway center light E 1 of runway B in red. At this time, the aircraft passes the stop bar light C1 and can approach the taxiway center light E1. When the aircraft passes the stop bar light C1, the stop bar light C1 lights red and instructs the next aircraft to prohibit entry to runway B. In other words, a stop bar light instructs the aircraft to enter the runway B so that only one aircraft can enter at all times.

The taxiway center light E1 for Runway B lights up green when Runway B becomes empty, that is, when gliding is enabled, allowing the aircraft to glide.

Conventionally, in the guidance of aircraft as described above, the controller checks the status of the aircraft in the airport and stops the aircraft appropriately. Bar lights CI, C2, ..., taxiway center lights Dl, D2, ... and taxiway center lights El, E2, ... are lit in red, green, extinguished, etc. And other aircraft are guided to runway B one by one and take off from the runway. Such a method places a considerable burden on the air traffic controller to monitor the aircraft, and has to stop guiding the aircraft to the runway when visibility is poor. The inventors of the present invention have conducted various studies with the aim of reducing the burden imposed on the air traffic controller and performing automatic monitoring with electronic devices that can guide the aircraft even when visibility is poor, and as a result, the transmission and reception of laser beams was performed. We developed a new aircraft position sensor system. That is, as shown in FIG. 1, this aircraft position sensor method uses transmitters F 1 and F 2. that transmit laser beam signals to a plurality of predetermined positions on taxiways A 1, A 2,... And runway B. ... and receivers G1, G2, ... that receive laser beam signals are installed so as to face each other, and the presence or absence of an aircraft is detected by transmitting and receiving laser beams.

However, among such transmitters and receivers, in particular, various types of external light enter the receiver as noise, and whether or not the incident light is a laser beam signal from a transmitter installed opposite to the receiver. It cannot be distinguished, and problems remain in terms of high accuracy and, consequently, reliability.

Therefore, in the present invention, it is to realize a sensor device having a high noise resistance as described below. Hereinafter, a specific embodiment will be described.

First, the aircraft position sensor device according to the embodiment shown in FIG. It has a first transmitting / receiving section (transceiver) 10 serving as a transmitter and a second transmitting / receiving section (transceiver) 20 serving as a receiver. These first transmitting / receiving sections 10 and 10 The two transmitting / receiving units 20 are installed opposite to each other at predetermined positions with the taxiway or runway or the taxiway and runway interposed therebetween.

The transmission / reception units 10 and 20 are provided with sensor number setting units (sensor number setting circuits) 101 and 201, each having a unique sensor number different from each other. Transmitting circuits (transratting circuits) 102 and 202 for transmitting a pulse-modulated laser beam signal having data encoded based on the sensor number, and a receiving unit (receiving) for receiving the laser beam signal. circuit) 103, 203, signal processing that outputs a "low level" detection signal indicating that there is no aircraft passing during reception after confirming the partner sensor number based on the received signal (Signal processor) 104 and 204. Transmitters 102 and 202 are composed of laser oscillators pulse-modulated according to coded data, and receivers 103 and 203 convert modulated laser beam signals into electric signals and output received signals It is composed of a photoelectric conversion circuit. The signal processing units 104 and 204 receive the reception signals from the reception units 103 and 203, extract the transmission unit code data from the reception signals, and recognize the sensor numbers of the transmission units 102 and 202. The signal processing units 104 and 204 receive the laser beam signals from the transmission units 102 and 202 by the reception units 103 and 203. s

During the reception, that is, while the aircraft does not enter the laser beam signal between the transmitter and the receiver, it outputs a "low level" detection signal. The power supplies 105 and 205 supply power to necessary components of each circuit unit.

Each of the transmission / reception units 10 and 20 having the above-described configuration is supported by a pole 1 fixed to the ground beside the runway or taxiway, for example, as shown in FIG. For example, it is stored in a box-shaped main body case 2. A laser emitting member a of a transmitting section 102 (or 202) is provided at the center of the main body case 2, and four light receiving members (l) are provided around the projecting section a. aser, receiving members) b For example, the laser projecting member a of the transmitting and receiving unit 10 emits one coded laser beam to the opposing light receiving member b of the transmitting and receiving unit 20, and the four light receiving members b of the transmitting and receiving unit 20 convert the laser beam into an electric signal. Convert.

Next, the operation of the aircraft position sensor device having the above configuration will be described.

The transmitters 102 and 202 transmit, for example, a transmission diode output (2 W laser diode r ¾) based on the sensor numbers of the sensor number setting units 101 and 201, for example. 4, which has coded data as shown in Fig. 4 and constantly transmits a laser beam signal that has been subjected to pulse modulation. The transmission peak power and the wavelength (wavelength) 905 nai are the same, and the laser beam signal is narrowed down by a lens in each case, and the distance is 200 m. In the vertical direction 0.5 m ± 50% and horizontal 0.25m ± 50%.

Note that the synchronization bit in FIG. 4 is a bit code for ensuring that the sensor numbers are read in the receivers 103 and 203, and for each sensor number or for a plurality of predetermined sensor numbers. Is inserted into the transmission data.

Here, one receiving unit 103 has the coded data transmitted from the transmitting unit 202, and after receiving the pulse-modulated laser beam signal by the light receiving unit b, The received signal is sent to the signal processing unit 104. The signal processing unit 104 compares the sensor number in the received signal with the partner sensor number set in advance on the basis of the synchronization bit, and sends a signal from the partner transmitter / receiver 20 in a pair relationship. It determines whether the signal is a signal or not, and outputs a "low level" detection signal indicating that the aircraft is not passing while the signal from the other party's transmitting / receiving unit 20 is being received.

The other receiving section 203 has the coded data transmitted from the transmitting section 102, and after receiving the pulse-modulated laser beam signal by the light receiving member b, the signal processing section 2 Send to 04. The signal processing unit 204 compares the sensor number in the signal received based on the synchronization bit with a preset sensor number of the partner transmitting / receiving unit 10, and determines the partner Judgment is made as to whether or not the signal is from the transmission / reception unit 10, and a “low-level” detection signal indicating that the aircraft is not passing while receiving the signal from the partner transmission / reception unit 10. Is output. On the other hand, the aircraft passes the taxiway and the laser beam signal If it is cut off by the machine, each receiver 103 and 203 cannot receive the laser beam signal, and as a result, each signal processor 104 and 204 cannot confirm the sensor number of each other party Therefore, at this time, it is determined that an aircraft is present, and a high-level detection signal is output. At this time, the taxiway center light that the aircraft is passing through, for example, light C1, is illuminated in red and Automatically instructs the aircraft to enter.

When the judgment results of the two signal processors 104 and 204 are different, it is possible to output a signal indicating that the sensor is abnormal, for example, an alarm signal. For example, a circuit for comparing the detection signals of the signal processing units 104 and 204 can be provided, and an alarm signal can be output when the two detection signals do not match.

Therefore, when the detection signals obtained from the transmission / reception units 10 and 20 obtained as described above are transmitted to one or both of the lamp drive control device and the control tower of another system, the lamp drive control device: Based on the detection signals from these transmitting / receiving sections 10 and 20, the stop bar lights C1,... And the taxiway center lights D1,. In addition, the controller of the tower gives instructions to start or stop the aircraft directly to the pilot of the aircraft, especially when it receives the detection signal of the passage of the aircraft, that is, the "high level" detection signal.

Therefore, according to the above-described embodiment, the transmitting and receiving units 10 and 20 are installed facing each other with a positional relationship sandwiching the taxiway and the runway. There is no need to bury equipment and it does not hinder the arrival and departure of aircraft The sensor device can be installed at Also, since signal identification is performed only by coding the laser beam signal, a signal identification circuit system can be compactly realized. Furthermore, by using the sensor number as a coded laser beam signal, the receiving side can reliably determine whether or not the signal is a laser beam signal from the transmitting / receiving unit of the other side, and has an effect on noise components due to external light. Instead, it is possible to reliably determine whether or not the signal is a laser beam signal from the transmitting / receiving unit on the other side, and thus accurately detect the presence or absence of an aircraft.

When a high-level detection signal is received from one of the signal processing sections 104 and 204 of the transmission / reception sections 10 and 20, and a low-level detection signal is received from the other, the lamp drive control is performed. The device regards this as a sensor error and informs the controller of the sensor error, for example. If the output of each signal processor 104 and 204 is sent directly to the control tower, the controller notifies the controller of the abnormality by means that can be sufficiently recognized.

Next, the embodiment shown in FIG. 5 will be described.

In this embodiment, the transmission / reception units 30 and 40 are provided with frequency setting units 301 and 401 in which different predetermined frequencies, each representing a unique sensor number, are set. Based on the frequency set value set by 1 and 401, pulse modulation is performed on different predetermined frequency signals that repeat on and off at regular intervals, and the pulse modulation signal is transmitted as a laser beam signal. Units 302 and 402, receive laser beam signals from transmitting units 302 and 402 Receiving sections 303 and 403, signals for checking the other party's transmitting and receiving sections 30 and 40 based on signals received from the receiving sections 303 and 4003, and for determining the presence or absence of an aircraft. The processing unit consists of 3◦4 and 404. The above-mentioned circuit is supplied with electric power by the power sources 300 and 405.

Therefore, according to the configuration of the embodiment as described above, a frequency unique to the frequency setting units 301 and 401 is set in advance for each transmitting / receiving unit. Therefore, in each of the transmitting sections 302 and 402, based on the set frequencies of the corresponding frequency setting sections 301 and 401, for example, a laser diode with a transmission peak output 2 is used as shown in FIG. A laser beam signal obtained by pulse-modulating such different frequencies f1 and f2 is transmitted.

The transmitting peak power and wavelength 905 ID of these two transmitting sections 302 and 402 are the same, and the laser signal is narrowed by a lens in each case, and the laser beam signal is always transmitted. It is assumed that

Here, the receiving section 303 in the transmitting / receiving section 30 has a laser beam having a predetermined frequency signal that repeats on / off at regular intervals sent from the transmitting section 402 of the partner transmitting / receiving section 40. The signal is received and transmitted to the signal processing unit 304. Here, the signal processing section 304 applies a gate synchronized with the frequency of the received signal, or a predetermined frequency signal extracted from the received signal and a predetermined frequency signal of the other party transmitting / receiving section 40. Are compared to determine that the signal is a laser beam signal from the transmission / reception unit 40 of the other party. In other words, the signal processing unit 304 receives the transmission / reception unit 40 When a laser beam signal of a predetermined frequency signal f2 is received from the remote controller, it is determined that the signal is from the partner transmitting / receiving unit 40 that is in a facing relationship, and for example, a "low level" indicating that no aircraft exists on the taxiway Is output.

The same processing is performed in the receiving section 403 and the signal processing section 404 in the transmitting / receiving section 40.If the laser beam signal is from the partner transmitting / receiving section 30, for example, there is no aircraft on the taxiway. determines that outputs a detection signal of "low" _t

On the other hand, if the predetermined frequencies f 2 and f 1 cannot be received for a required time from the other party's transmitting / receiving sections 40 and 30 in the signal processing sections 304 and 404 of the transmitting / receiving sections 30 and 40, respectively. For example, it determines that there is an aircraft on the taxiway and outputs a "high level" detection signal.

When the judgment results of the signal processing sections 304 and 404 are different, it is possible to judge that the sensor is abnormal, that is, the transmitting / receiving section is abnormal, and to output an alarm signal. Therefore, in this case, the judgment of the controller should be given priority as before. Next, an aircraft position sensor device according to another embodiment will be described with reference to FIG.

The transmission / reception units 50 and 60 are provided with a sensor number setting unit 501/601 that sets a unique sensor number different from each other for each of the transmission / reception units 50 and 60, and an odd number of bits according to the sensor number. Alternatively, check code generators 502 and 602 for generating check codes having regularity so as to be even-numbered bits, and sensor number setting units 501 and 601 for generating check codes. Based on sensor number Transmitters 503 and 60 that transmit pulse-modulated laser beam signals by adding check code generators 5◦2 and 602 to the coded data. 3.Receiving sections 504 and 604, which receive the laser beam signals from transmitting sections 503 and 6H3, confirm the partner sensor number based on the received signals, and extract from the received signals. It comprises signal processing units 505 and 605, which check whether or not a laser beam signal is transmitted from a check code according to a predetermined rule. The receiving unit, the transmitting unit, and the processing circuit unit are supplied with power by the power supplies 506 and 606.Accordingly, according to the configuration of the above-described embodiment, for example, As shown in Fig. 8, pulse modulation was performed using a laser diode with a transmission peak output of 2 according to the synchronization bit and sensor number shown in Fig. 4 and a check code added to the data. If a laser beam signal is transmitted, the receivers 504 and 604 receive the laser beam signal based on the synchronization bit and transmit it to the signal processors 505 and 605. These signal processing sections 505 and 605 determine the presence or absence of an error in the sensor number using a check code, and if there is no error, the other party transmission / reception sections 60 and 5 At the same time as determining that the sensor number is 0, for example, it is determined that there is no aircraft on the taxiway, and a "low level" detection signal is output.

-Conversely, if the signal processing unit 505 and 605 determine that there is an error from the check code even if the sensor number is correct, It outputs one signal or alarm signal or does not adopt the received laser beam signal. Further, when different results are obtained from the signal processing sections 505 and 605, it is possible to determine that the transmission / reception sections 50 and 60 are abnormal and to output an alarm signal.

Another embodiment will be described with reference to FIG.

The device of this embodiment is composed of oscillating units 71 1 and 81 1 for generating different wavelengths λ 1 and I 2, wavelengths 1 and 8 set by the oscillations 発振 7 1 and 8 0 1, respectively; Transmitters 70 and 802 that continuously oscillate I 2, wavelengths sent from partner transceivers 80 and 70; I 1 and receiver 7 with optical filters that pass through I 2 The circuit is composed of 03 and 803, signal processing sections 704 and 804, power supply sections 705 and 805, and the like.

According to the apparatus of this embodiment, each of the signal processing units 704 and S04 is composed of the wavelengths received by each of the reception units 703 and 803 and the preset transmission / reception units 80 and 70 Then, it is determined that the signal is a laser beam signal from the transmission / reception units 80 and 70 of the other party. In other words, when the signal processing unit 704 receives the laser beam signal of the predetermined wavelength; I2 from the transmission / reception unit 80 on the other side, it determines that the signal is from the transmission / reception unit 80 on the opposite side. For example, it outputs a "one-level" detection signal indicating that no aircraft exists on the taxiway.

ί ^ The same processing is executed in the signal processing unit 804 in the communication unit 80, and the laser beam signal from the partner transmitting / receiving unit 70 is executed. In the case of, for example, it is determined that there is no aircraft on the taxiway, and a "low level" detection signal is output.

When a different result is obtained from each of the signal processing units 704 and 804, an alarm signal indicating that the transmission and reception unit 70 or 80 is abnormal can be output.

The present invention is not limited to the above embodiment. For example, when transmitting the output of each transmission / reception unit 10 to 80 to a lamp drive control device or a control tower via a transmission line, not only the original detection signal from each -signal processing 105 to 805 but also A signal corresponding to the sensor number may be transmitted at the same time. In addition, not only the laser beam but also a radiation beam such as an ultrasonic wave or a microphone mouth wave may be modulated by coded data, and the presence or absence of an aircraft may be detected by transmitting and receiving the modulated data.

Industrial applicability

As described above, according to the present invention, construction requirements, maintainability, and other various requirements can be sufficiently satisfied, and the presence / absence of an aircraft can be detected with high accuracy while sufficiently considering noise measures. .

Claims

The scope of the claims

1. The aircraft position sensor device that detects the position of aircraft on taxiways and runways provided at airports is:

Transmitting means for transmitting a radiation beam signal having coded data, installed at a predetermined position on at least one of the taxiway and the runway;

Receiving means for receiving a radiation beam signal transmitted from the transmitting means, the receiving means being opposed to the transmitting means via at least one of a taxiway and a runway;

Consisting of

When the receiving means recognizes that the code data of the radiation beam signal is proper code data, it informs that an aircraft is not present at least in one of predetermined positions on the taxiway and the runway. _C having a detection signal output means for outputting a detection signal indicating

2. The transmitting means is a sensor number setting circuit for setting a sensor number unique to the transmitting means, and is pulse-modulated by data coded according to the set sensor number, and receives the laser beam signal. 2. The aircraft position sensor device according to claim 1, wherein the aircraft position sensor device is constituted by a laser oscillator transmitting to the means.

3. The receiving means checks the sensor number of the transmitting means arranged opposite to the receiving means based on the received laser beam signal, and passes through the aircraft while receiving the laser beam signal having this sensor number. 3. The aircraft position sensor device according to claim 2, comprising a signal processing circuit for outputting a detection signal indicating that there is no signal.

4. The aircraft position sensor device that detects the position of the aircraft on taxiways and runways at airports is:

It consists of a plurality of transceivers installed facing each other with at least one of the taxiway and runway interposed,

Each of the transmission / reception devices is transmitted from a transmission unit for transmitting a laser beam signal having coded data, and a transmission unit of a transmission / reception device oppositely installed via at least one of a taxiway and a runway. Receiving means for receiving the generated laser beam signal, wherein the receiving means, when recognizing that the code data of the laser beam signal is appropriate code data, detects the taxiway and the runway. At least a detection signal indicating that no aircraft is present at one predetermined position is output.

5. Each of the transmitting and receiving devices is housed in a main body case supported by a pole fixed to the ground beside the runway or taxiway, and the transmitting means includes a laser projecting member provided at a central portion of the main body case. 5. The aircraft position sensor device according to claim 4, wherein said receiving means comprises a plurality of light receiving members disposed around said projection member.

6. The transmitting means is a sensor number setting circuit for setting a sensor number unique to the transmitting means, and is pulse-modulated by data encoded according to the set sensor number, and receives the laser beam signal. 5. The aircraft position sensor device according to claim 4, wherein the aircraft position sensor device is constituted by a laser oscillator transmitting to the means.

7. The receiving means determines the sensor number of the transmitting means arranged opposite to the receiving means based on the received laser beam signal. 6. The navigation system according to claim 5, further comprising a signal processing circuit that outputs a detection signal indicating that there is no passage of the aircraft while receiving the laser beam signal having the sensor number. Empty position sensor device.

S. The signal processing circuit is arranged in a pair of transmitting and receiving devices that are arranged opposite to each other, and compares a sensor number in a received signal with a partner sensor number registered in advance to determine a pairing relationship. Claim 7 determining whether or not the signal is from a certain transmitting / receiving section, and outputting a detection signal indicating that the aircraft is not passing while receiving the signal from the other transmitting / receiving section. An aircraft position sensor device according to the item.

9. The aircraft position sensor device according to claim 7, further comprising means for generating a signal indicating a sensor abnormality when the judgment results of the signal processing circuits of the paired transmitting and receiving devices are different.

1. The transmitting means transmits a laser beam signal to which a coded code is added in accordance with a certain rule in the coded data, and the receiving means transmits a laser beam signal to the coded data. 5. The aircraft position sensor device according to claim 4, wherein it is determined whether or not the code day is appropriate using an EC code, and the presence or absence of the aircraft is detected.

1 1. The aircraft position sensor device that detects the position of aircraft on taxiways and runways provided at airports is:

It is composed of a plurality of transceivers installed facing each other with at least one of the taxiway and the runway interposed, and each of the transceivers turns on and off at regular intervals. A transmitting means for transmitting a laser beam signal of a predetermined frequency to be returned, and a laser of a predetermined frequency transmitted from a transmitting means of a transmitting / receiving device opposed to at least one of a taxiway and a runway. Receiving means for receiving a beam signal, wherein when the receiving means continuously receives a frequency different from the predetermined frequency for a predetermined time or more, an aircraft is present at a predetermined position on the taxiway or runway. And a detection signal output means for outputting a detection signal to the effect.

12. Each of the transmitting / receiving devices is housed in a main body case supported by a pole fixed to a ground surface beside a runway or a taxiway, and the transmitting means is provided at a central portion of the main body case. 12. The aircraft position sensor device according to claim 11, further comprising a laser projecting member, wherein said receiving means is constituted by a plurality of light receiving members disposed around the projecting member.

13 3. The aircraft position sensor device that detects the position of aircraft on taxiways and runways provided at airports is:

It comprises a plurality of transmitting and receiving devices installed facing each other with at least one of a taxiway and a runway interposed therebetween, each of the transmitting and receiving devices transmitting a laser beam signal of a predetermined wavelength, and Receiving means for receiving a laser beam signal of a predetermined wavelength transmitted from a transmitting means of a transmitting / receiving device which is installed opposite to at least one of the taxiway and the runway, and wherein the receiving means includes: When a wavelength different from the predetermined wavelength is continuously received for a predetermined time or more, a detection signal indicating that an aircraft is present at a predetermined position on the taxiway or runway is output. Detection signal output means.

14. Each of the transmitting and receiving devices is housed in a main body case supported by a pole fixed to a ground surface beside a runway or a taxiway, and the transmitting means is provided at a central portion of the main body case. 14. The aircraft position sensor device according to claim 13, further comprising a laser projecting member, wherein said receiving means is constituted by a plurality of light receiving members disposed around the projecting member.