JP2003050284A - Aircraft detection device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect the existence of an aircraft by receiving a reflected signal originated from a transmitted wave highly accurately without interference between the transmitted wave and a reflected wave. SOLUTION: This aircraft detection device is constituted from reflectors 22 installed at required distances on one side of a taxiway, and aircraft sensors 21 installed at required distances on the other side of the taxiway. The aircraft sensor is equipped with a microwave circuit 23 for transmitting a microwave pulse signal by circular polarization toward the reflectors, and receiving the reflected waves from the reflectors including the taxiway, and an operation processing control part 25 for setting a detection area and a reflection area related beforehand with the taxiway and the reflectors, generating a reception pattern from the size relation between a reception level of the reflected wave from the detection area and the reflection area and a threshold determined beforehand, and acquiring a detection signal of existence of the aircraft corresponding to a pattern to which the reception pattern belongs among plural patterns determined beforehand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aircraft detection device and a program for detecting the presence or absence of an aircraft traveling on an airport runway, taxiway or the like.

[0002]

2. Description of the Related Art This type of airport monitoring control system is also called a lighting monitoring control system or a lighting / power monitoring control system, and is installed in a taxiway or the like by detecting the moving position of an aircraft traveling in the taxiway or the like. Lighting and extinguishing of stop line lights including taxiway center line lights are implemented to ensure safe operation in the airport.

By the way, conventionally, a method of detecting an aircraft moving in various places such as a taxiway is based on transmission by transmitting an optical signal or a microwave to one of the two sides of the taxiway in which the aircraft moves. A receiver that receives optical signals and microwaves is installed on the other side of the aircraft, and when the signal transmitted from the transmitter is cut off, it is a method of detecting that the aircraft has passed on the receiver side. .

[0004]

However, since the signal detection method is adopted in the above-described aircraft detection method, two transmitters and two receivers are required, and the predetermined method is required along the taxiway. Since it is necessary to install a large number of transmitters / receivers for each distance, the cost is very high.

As another conventional example, a pulse generator is installed on one side of a guideway or the like, and a reflector is installed on the other side, so that the reflection time of a pulse signal generated from the pulse generator is reduced. There is also a method to detect the passage of an aircraft from.

[0006] This aircraft detection method uses a number 1 for transmission.
When the frequency of 00 MHz to several tens GHz is used, the wavelength becomes several meters to several cm. For example, when the frequency of several tens GHz is used, interference occurs between the incident wave and the reflected wave in units of mm, and the reflection plate is accompanied with this. Also, there is a problem that the presence or absence of an aircraft cannot be accurately detected due to fluctuations in the reception level from the aircraft.

Further, when the transmitter / receiver, the pulse generator, etc. are installed outdoors, the reception level is more likely to fluctuate based on the vibration due to the influence of wind and the relationship between the reflection position and the reception position. However, there is an inconvenience that the detection capability is further reduced.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an aircraft detection device and a program for highly accurately receiving a reflected wave of a transmission signal and accurately detecting passage of an aircraft.

[0009]

[Means for Solving the Problems] In order to solve the above problems, the presence or absence of an aircraft moving on a runway or taxiway is detected in order to control lights installed on the runway or taxiway of an airport. However, the aircraft detection device according to the present invention, which transmits the aircraft presence / absence detection signal to the operator console side through the upper master station, is a reflector installed on one side of the runway or taxiway at a required distance. And a microwave circuit for transmitting a microwave pulse signal of circularly polarized wave toward the reflector and receiving a reflected wave reflected from the reflector including one of the runway and the guideway, and the gliding circuit. Road,
When the reception level of the reflected wave reflected from any one of the taxiways exceeds a predetermined threshold value, it is determined that there is an aircraft, and an arithmetic processing control unit that transmits an aircraft presence detection signal to the upper master station is provided. The aircraft sensor is installed on the other side of the runway and the taxiway at a required distance.

According to the present invention, by adopting the above-mentioned structure, a microwave pulse signal of circular polarization is transmitted from the microwave circuit to the reflecting plate, and the reflection signal including either the runway or the taxiway. After receiving the reflected wave reflected from the board, when the reception level exceeds a predetermined threshold, the arithmetic processing control unit determines that there is an aircraft, so a microwave pulse signal with circular polarization is used. By
The microwave circuit can be received without interference between the transmitted wave and the reflected wave, and the reception level can be received with less fluctuation, and when the reception level exceeds the threshold value, it is determined that the aircraft is present. It is possible to accurately detect the presence or absence of.

When the presence / absence of an aircraft is determined by the arithmetic processing control unit, a detection area and a reflection area associated with either the runway or the taxiway and the reflector are set in advance. If a reception pattern is created from the magnitude relationship between the reception level of the reflected wave from the reflection area and the threshold value, and the detection signal of the presence or absence of the aircraft is acquired according to which of a plurality of predetermined patterns, the pattern can be obtained. The processing makes it possible to accurately detect the presence or absence of an aircraft.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram showing an embodiment of an airport supervisory control system to which an aircraft detection device according to the present invention is applied.

This airport monitoring control system monitors the display status of various lights L, which are facilities in the airport, and the presence / absence detection signal of the aircraft by the aircraft detection device C, and controls the turning on / off of the lights L based on the monitoring result. And an operator console 1 for performing an operation test of each slave station and performing an operation such as resetting each slave station, and a signal is exchanged with the operator console 1 connected to the console 1 via a control LAN. A central monitoring room (hereinafter referred to as a host system) consisting of a monitoring control panel 2 and the like, and various lights L,
The display state of ... and the aircraft presence / absence detection signals of the aircraft detection devices C installed in various places such as taxiways 3 are collected and notified to the host system, and the control signals from the host system are sent to each slave station and the aircraft. The master station 4 for transmitting to the detection device C and the like is provided.

In the airport supervisory control system, a power source generator (CCR) 5 for generating a constant current from a commercial AC power source and supplying power to a lamp L, which is an airport lighting facility, is derived from the power source generator 5. Are connected in series to the respective power lines 6 via rubber transformers 7 to individually monitor the lighting conditions of the respective lights L, ..., And the lights L, ... Are lit based on the control signal transmitted from the master station side. -The slave stations 8, ... which control the turning off are provided. Reference numeral 9 is an aircraft moving on the taxiway 3, for example.

The master station 4 and each aircraft detection device C are LA
N or a dedicated transmission line 10 is connected, a control signal for aircraft monitoring is transmitted from the master station 4 to each aircraft detection device C via the transmission line 10, and an aircraft presence / absence detection signal is transmitted from each aircraft detection device C. It is transmitted to the master station 4 via the transmission line 10.

Further, the master station 4 and the slave stations 8 corresponding to the lamp L,
Are connected to each other by a transmission line 11 and are configured to exchange signals with each other.

When signals are transmitted and received between the master station 4 and each slave station 7 and each aircraft detection device C corresponding to each light and the master station 4, the power generation device 5 outputs the signal, which is not shown. A filter device is provided in the middle of the power line, the filter device is electrically coupled to the master station 4 through a transformer dedicated to the master station, and the power line on the output side of the filter device has lights L, ... And an aircraft detection device C. ,, ... are connected. At this time, the transmission lines 10 and 11 are unnecessary.

By the way, as shown in FIG. 2, the aircraft detection device C, ... According to the present invention has a runway, a taxiway, etc.
For convenience of description, the aircraft sensor 21 is installed on one side of the guide path 3 at a required distance and has a microwave transmitting / receiving function for transmitting a microwave signal and measuring the reflection time of the reflected wave, for example. , And a reflector plate 22, which is installed on the opposite side of each of the aircraft sensors 21 ,. That is, the aircraft sensor 21 and the reflector 22 are installed so as to face both sides of the taxiway 3 along which the aircraft moves. It should be noted that FIG.
It is a figure which shows the state when there exists no, and is the figure which looked at the width direction from the substantially central part of the taxiway 3. FIG. 2B is a diagram showing a state in which the aircraft 9 is present on the taxiway 3, and is also a view of the taxiway 3 viewed from the substantially central portion in the width direction.

The taxiway 3 is composed of a central portion having a road width of 30 m to 60 m and shoulder portions of 30 m formed on both sides of the central road width. Therefore, the round trip distance of the microwave signal generated from the aircraft sensor 21 is approximately 180 m to 240 m. Although the central portion of the guide path 3 is formed in a triangular shape having a bulge such that the center line thereof has the maximum height, it may be formed flat like the shoulder portion.

Signal generation methods by the aircraft sensor 21 include a vertical polarization generation method shown in FIG. 3 and a horizontal polarization generation method shown in FIG. This generation method using vertical polarization is a wave generated by longitudinal vibration by changing the angle (phase) around the x-axis and rotating the z-axis.
It has a strong property of reflecting the tilt in the axial direction. On the other hand, the horizontal polarization generation method is a wave generated by lateral vibration by changing the angle (phase) around the z axis and rotating it, and has a property of being strong against reflection in the x axis direction.

Therefore, as the aircraft sensor 21, FIG.
By using a circular polarization that uses the vertical polarization and the horizontal polarization that make the characteristics of the above-mentioned two knitting waves one, as shown in
If the wave generated by the oblique vibration is propagated, the transmission / reception function can be realized with one configuration. That is, by using the vertically polarized wave and the horizontally polarized wave, it is possible to configure one aircraft sensor 21.

Normally, the surface of a moving body such as an aircraft is rarely in the same direction as the aircraft sensor 21, and if a reflecting plate 22 is installed at a position opposite to the aircraft sensor 21 with the taxiway 3 in between, When the aircraft does not block the microwave transmission path, it is possible to receive the reflected wave having a stable reception level from the reflector 22.

Further, when the above circularly polarized wave is used,
The pulse signal of the microwave that is the transmitted wave is clockwise, but the reflected wave from the reflection plate 22 is reflected counterclockwise. As a result, the reflected wave from the reflection plate 22 is changed in a direction different from the transmitted waveform, so that the aircraft can be detected without being affected by the interference due to reflection and the direction of the reflecting surface.

As shown in FIG. 6, the aircraft sensor 21 generates a microwave pulse signal for aircraft detection, and a microwave circuit section 23 for receiving a reflected wave from the reflector 22 or the aircraft, and an upper parent circuit. Communication means 24 having a communication modem section for exchanging signals with the station 4 and a CPU
The arithmetic processing control unit 25 configured as described above, a storage medium 26 that stores an aircraft detection program, and a data buffer 17 that temporarily stores data necessary for executing the program processing.

The microwave circuit section 23 transmits a circularly polarized microwave pulse signal based on a transmission command from the arithmetic processing control section 24 and a timing control signal from the microwave transmission circuit section 23a. Received,
A microwave receiving circuit section 23b for receiving a signal of a reflected wave from the reflection plate 12 including the guiding path 3 of the microwave pulse signal transmitted from the microwave transmitting circuit section 23a is provided.

The communication means 24 includes an arithmetic processing control section 25.
The control signal transmitted from the master station communication transmitter 24a and the master station 4 for converting the detection signal of the aircraft sensor 21 processed in step 4 into a signal conforming to the required transmission format and transmitting the signal to the master station 4 is received. An upper master station communication reception unit 24b for converting into a signal processable by the arithmetic processing control unit 15 is provided.

The arithmetic processing control section 25 outputs a transmission command to the microwave circuit section 23 at a predetermined cycle, and a detection signal which is a reflected wave from the reflector 22 or the aircraft received by the microwave circuit section 23. Is converted into a required signal and sent to the communication means 24, and the required processing is executed based on the control signal received by the communication means 24.

Transmission / reception of a pulse signal by a circularly polarized microwave is performed as follows.

The arithmetic processing control unit 24 transmits a microwave pulse signal by circular polarization during the transmission time obtained from the distance to the reflector 22 and the transmission frequency.
A transmission command is sent to the transmission circuit unit 23a while sequentially varying a plurality of different angle signals. The transmission circuit unit 23a receives the transmission command of the angle signal that is sequentially changed,
A microwave pulse signal of circular polarization having a pulse width of 0 ns is transmitted from the transmitting antenna 23c over the transmission time (see FIG. 7A), while a timing control signal is transmitted to the receiving circuit unit 23b.

The receiving circuit section 23b receives the timing control signal, masks it for the transmission time as shown in FIG. 9B, turns off the mask when the time corresponding to the transmission time has elapsed, and sets the reception state. to go into. As a result, the reception circuit unit 23b acquires a reception level as shown in FIG. 7D, which is obtained by sequentially adding the reception signals of the reflected waves returned by the reflection from the swelling portion including the road surface of the taxiway 3. . As this reception level, as shown in the same figure, influences of transmission leakage and road surface reflection such as swelling parts also appear. Therefore, a threshold value is set in advance, and the reflection plate 22 is included in the reception level within a predetermined time. When the reception level during the period reaches the threshold value, it is determined that there is an aircraft. The time zone in which the reception level exceeds the threshold value in FIG. 6D is the reception level of the reflected wave due to the reflection from the reflection plate 22 installed 120 m on the opposite bank. When the reception level of the reflected wave received in the regular reception area exceeds the threshold value as shown in FIG. 7C, it is determined that the reflection wave is reflected from the reflection plate 22, and until then, for example, 30 m, 60m,
When the reception level is less than or equal to the threshold value in a time zone of 90 m or the like, it is determined that there is no aircraft, and when the reception level in the relevant time zone exceeds the threshold value, it is determined that there is an aircraft.

Next, the operation of the above aircraft detection device will be described with reference to the drawings.

Normally, the master station 4 is connected to one power source generator 5, and the supervisory control of each master station 4 is performed by the supervisory control panel 2. The monitoring control panel 2 takes in the display states of the lights L, ... Under the control of the master stations 4, ... And the aircraft detection states of the aircraft detection devices C, ..., and sends them to the operator console 1 via the control LAN. To do. Therefore, the operator console 1 intensively monitors the display presence / absence state of each lamp L, ... And the aircraft detection state of each aircraft detection device C ,. On the other hand, the parent station 4 and each child station 8
Communication with the communication is performed by a communication line or power line carrier.

By the way, when the aircraft sensor 21 shown in FIG. 6 determines that the aircraft has passed and receives the aircraft detection signal, the signal is transmitted to the operator console 1, and based on the control instruction from the operator console 1, the master station 4 causes the taxiway 3 to proceed. The lighting L of the necessary place above is turned on / off.

The arithmetic processing control unit 2 of the aircraft sensor 21
As shown in FIG. 8, when a variable angle signal, which is a switch signal, is sent to the microwave circuit section 23 at a predetermined cycle for a predetermined transmission time, the microwave circuit section 23 causes the microwave signal from the transmission antenna 23c with a slight time delay. Transmit circularly polarized microwave pulse signal.

From the microwave circuit section 23 to the reflector 22
The speed of light of the microwave pulse signal transmitted toward
Since it is × 10 ⁸ [m / s], the distance can be obtained from the transmission time and the reflection time. For example, as shown in FIG. 7, when the aircraft sensor 21 outputs 20 ns,
Since the transmitted signal corresponds to 30 [m], its reflection state can be monitored at intervals of 30 [m], and the reflector 22 is installed at a position of 120 [m] and there is no aircraft. In this case, the maximum reception level is obtained in the 120 [m] section. Since it is expected that the received data of one time will vary depending on the environment, the data obtained by adding the received data of several times is adopted.

Here, the arithmetic processing control section 25 sends the angle variable signal, which is a switch signal, at predetermined intervals to perform the transmission processing as described above. Specifically, a series of operations as shown in FIG. 9 is performed. Send processing is executed in a flow. That is, the arithmetic processing control unit 25, when the transmission start time comes, hi → lo.
When it becomes w (S1), the switch signal is transmitted. here,
The arithmetic processing control unit 25 determines whether or not a predetermined transmission time, which is the on-time of the switch, has been completed (S2), and if the transmission time has not yet been completed, repeatedly sends a switch signal.

Here, when it is judged that the transmission time is completed, the transmission end is set to low → hi (S3),
It is confirmed whether or not the transmission has been properly completed (S4), and when the transmission is properly completed, a panel of the display unit of the arithmetic processing control unit (personal computer) or an external panel to the arithmetic processing control unit (personal computer) (see FIG. 14). ) LED 29 is turned on (S5),
If the transmission fails, the LED 29 is turned off (S6). When the transmission is completed, the LED is turned on and the reception standby state of the reception data from the reception circuit section 23b forming the microwave circuit section 23 is entered.

On the other hand, since the receiving sensitivity of the receiving circuit portion 23b in the aircraft sensor 21 changes with the ambient temperature,
The arithmetic processing control unit 25 regularly updates the threshold value. The calculation of the threshold value to be updated is divided into a detection area for detecting the presence or absence of an aircraft such as the taxiway 3 and a reflection area for detecting the reflection from the reflection plate 22 as shown in FIG. Calculate by

Acquisition of Position (Set Value) of Reflector 22 The response time from the reflector 22 is calculated from the position of the reflector 22 set by the aircraft sensor tool.

Setting of Detection Area / Reflection Area Based on the position of the reflection plate 22 and the transmission time, the reflection area that is normally received from the reflection plate 22 is set. A detection area is defined between the transmission time and the reflection area. Data from the reflection area until the next transmission start is not acquired.

Acquisition of Maximum Value in Detection Area The maximum value of the reception level of the reflected wave in the detection area is acquired.

Acquisition of Maximum Value in Reflection Area The maximum value of the reception level of the reflected wave in the reflection area is acquired.

Calculation of Threshold Value An example of threshold value calculation is obtained as follows.

Threshold = (maximum value of detection area + maximum value of reflection area) / 2 However, the condition of the maximum value of detection area <maximum value of reflection area is a condition, and the other conditions are discarded.

Update of threshold value The above-described processings 1 to 3 are repeated about 10 times to obtain the minimum threshold value.

When there is the previous data: 10 from the previous value
If the difference is more than%, retry processing (RT = 2 times) is performed and the obtained threshold value is adopted.

First time (after reset): The calculated threshold value is adopted.

Using the threshold values calculated as described above, the patterns are classified into four patterns as shown in FIG. 11 according to the reception level of the reflected wave.

Pattern 00: <Phenomenon> When both the reflection area and the detection area are below the threshold, <Judgment> Aircraft detection pattern 01: <Phenomenon> When the reflection area is above the threshold of the detection area and below the detection area threshold, <Judgment> No Aircraft Detection Pattern 10: <Phenomenon> When the reflection area threshold value or less and both detection areas are above the threshold value, <Judgment> Aircraft detection pattern 11: <Phenomenon> Reflection area and detection area both above the threshold value At this time, <judgment> Aircraft detection When the pattern 00, that is, both the reflection area and the detection area are below the threshold value, especially when the reception level of the reflected wave from the reflector 22 is below the threshold value, some object ( Since it is possible that an obstacle is passing through,
It is judged from the safety side that the aircraft is detected.

Therefore, the arithmetic processing control section 25 of the aircraft sensor 21 determines the presence / absence of an aircraft by monitoring the patterns classified as described above. Hereinafter, a series of processes are executed based on the aircraft detection program (see FIGS. 12 and 13) stored in the storage medium 16 shown in FIG.

The arithmetic processing control unit 25 uses the data buffer 2
After setting the detection area to 7 (S11), the previous detection area reception pattern is reset (S12). Then, the data buffer 27 or a counter (not shown)
= 1 is set (S13), the addition data of the reception signal obtained from the predetermined distance range of the taxiway closest to the aircraft sensor 11 is calculated (S14), and it is determined whether or not it is the maximum value (S14).
15). Since the previous value is zero at the beginning, the added data by this reception becomes the maximum value, so after writing this maximum value data in the data buffer 27 (S16), it is determined whether or not all detection areas are completed (S17). . At this stage, since it is incomplete, i is incremented by +1 (S1
8), the process proceeds to step S14, and the reception level of the current reflected wave obtained from the next predetermined distance range and the data buffer 27
The maximum value of the previous reception level stored in is compared to determine which is the maximum value (S15). When the reception level of the current reception is large, the maximum value before the previous time stored in the data buffer 27 is written and updated using the reception level (S16). In this way, the largest addition data is extracted from all the detection areas. Step S1
1 to S18 are detection area maximum value extraction functions by the arithmetic processing control unit 15.

When the maximum value data in the detection area is extracted as described above, the maximum value data is subsequently read from the data buffer 27 (S19) and compared with a preset threshold value, and the maximum value data is found. It is judged whether or not the threshold value is exceeded (S20). If the threshold value is exceeded, "1" is written in the upper bit of the reception pattern (S2).
1) On the other hand, when it is less than or equal to the threshold value, "0" is written in the upper bit of the reception pattern (S22) to complete the reception pattern formation of the detection area. Step S19
S22 is a detection area patterning function by the arithmetic processing control unit 25.

Next, after setting the reflection area in the data buffer 27 (S23), the previous reflection area reception pattern is reset (S24). Then, j = 1 is set in the data buffer 27 or a counter (not shown) (S2
5) Then, the reception level of the reflected wave obtained from the predetermined distance range closest to the reflection plate 22 is calculated (S26), and it is determined whether or not it is the maximum value (S27). Since the previous value is zero at the beginning, the current reception level becomes the maximum value, so after writing this maximum value data in the data buffer 27 (S2
8) It is determined whether the total reflection area is completed (S29). At this stage, since it is incomplete, +1 is incremented to j (S30), the process proceeds to step S25, and the current reception level of the reflected wave obtained from the next predetermined distance range and the previous reception level stored in the data buffer 27 are stored. The maximum value is compared to determine which is the maximum value (S27). When the reception level of the current reception is large, the maximum value before the previous time stored in the data buffer 27 is written and updated using the reception level (S28). In this way, the highest reception level is extracted from the total reflection area. Step S2
3 to S30 are the reflection area maximum value extraction functions by the arithmetic processing control unit 25.

When the maximum value data in the reflection area is extracted as described above, the maximum value data is subsequently read from the data buffer 27 (S31) and compared with a preset threshold value, and the maximum value data is found. It is determined whether or not the threshold value is exceeded (S32). If the threshold value is exceeded, "1" is written in the lower bit of the reception pattern (S3).
3) On the other hand, when the value is less than the threshold value, "0" is written in the upper bit of the reception pattern (S34) to complete the reception area patterning of the reflection area. Step S31
S34 is a reflection area patterning function by the arithmetic processing control unit 25.

When the reception pattern formation processing by both areas is completed, it is specified which of the four reception patterns the reception pattern this time belongs to, as shown in FIG. 13 (S35), and the previous reception pattern is obtained. The reception pattern obtained this time is compared with the reception pattern obtained this time, and it is judged whether there is a change compared with the reception pattern of the previous time (S36), and when there is no change, a flag indicating that it is the same as the previous time is set (S36).
37), the process proceeds to step S38, and it is determined whether or not the number of times of continuous detection is detected (S38). This step S38 is n (n =
For example, it is 3) judgment of whether or not the reception patterns are the same.

Then, when it is determined that the number of times of continuous detection is the number of times of continuous detection, it is determined whether or not the reception pattern is a reception pattern for aircraft detection, and when it is determined that it is an aircraft detection pattern, it is determined as aircraft detection. (S40), when it is determined that the pattern is the aircraft non-detection pattern, the aircraft is not detected (S41). These steps S35 to S37
Is a reception pattern analysis function in the arithmetic processing control unit 15,
S38 to S41 are aircraft detection determination functions.

Therefore, according to the above-described embodiment, the reception pattern is created according to whether or not the addition data of the reception signals from the detection area and the reflection area exceeds a predetermined threshold value. If the reception pattern is the same a plurality of times, and if the reception pattern corresponds to an aircraft detection pattern among a plurality of patterns prepared in advance, it is determined to be aircraft detection, so even if there is a slight change in the reception state, The presence or absence of an aircraft can be detected accurately and with high accuracy.

The same effect can be obtained even when the computer by the arithmetic processing control unit 25 reads the program stored in the storage medium 26 and executes a series of processes as shown in FIGS. 12 and 13. .

FIG. 14 is an explanatory view showing another embodiment of the aircraft detection device according to the present invention.

In this embodiment, the maximum value of the reception level of the detection area and the reflection area and the distance from the aircraft sensor 21 at that time are respectively displayed on the personal computer which is the arithmetic processing control unit 25 which is a part of the aircraft sensor 21. The reception state display section 31 (see FIG. 14: display screen) or a display panel externally attached to the personal computer which is the arithmetic processing control section 25 by a connector is provided, and the maximum value of the reception level and the distance from the aircraft sensor 21 at that time. By displaying, it is possible to easily grasp at which part of the taxiway the reception level is maximum.

Further, the operation history of the format shown in FIG. 15 is created in the internal memory or the external memory of the personal computer which is the arithmetic processing control unit 25 which is a part of the aircraft sensor 21, and the detection area and the reflection area are set at predetermined intervals. By storing the maximum point (distance) and the maximum level thereof in time series, the operation history as shown in FIG. 15 can be displayed on the screen of the sensor tool personal computer 11a. As a result, the movement trajectory of each aircraft can be grasped, and at the same time, if the operation history of the format shown in FIG. 15 is saved for each name of the pilot, the relationship between the state of the taxiway and the pilot's control can be analyzed. Become.

Furthermore, the aircraft detection device C according to the present invention
As another example of the embodiment, as shown in FIG. 16, the microwave circuit unit 23 checks the output of the transmitting antenna 23c (S51) and determines whether the output is normal (S5).
2) When the transmission output from the antenna 23c is output, it is determined to be normal, and the TX monitor signal is set to high (hi) (S
53), when no output is made from the antenna 23c, it is detected as an abnormality (S54), and counting is started every predetermined time (S55). Then, it is judged from the count value whether or not it has become a predetermined time period (100 ms) or more (S56), and when the output from the transmitting antenna 23c has been output within the predetermined time period, it is judged that the signal has recovered (S57), and the TX monitor signal is output. Is made high (S58), while the TX monitor signal is made low (S59) when a predetermined period or more has elapsed.

On the other hand, the arithmetic processing control unit 25 monitors the TX monitor and judges whether or not the TX monitor signal is low (S61). If the TX monitoring signal is high, the arithmetic processing control unit (personal computer) display or the arithmetic operation is performed. The LED 29 of the panel (see FIG. 14) externally attached to the processing control unit (personal computer) is turned on (S62), and when it is low, the LED 29 is turned off (S62).
63). This makes it possible to determine whether or not there is an abnormality in the transmission state.

In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. Further, the respective embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Furthermore, each of the above-described embodiments includes various inventions of higher and lower stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when the invention is extracted by omitting some of the constituent elements from all the constituent elements described in the means for solving the problem, the omitted part when implementing the extracted invention. Are appropriately supplemented by well-known techniques.

[0066]

As described above, according to the present invention, the aircraft detection device capable of accurately detecting the presence or absence of an aircraft by eliminating the interference between the transmitted wave and the reflected wave and receiving the reflected signal of the transmitted wave with high accuracy. And a program can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an airport monitoring control system to which an aircraft detection device according to the present invention is applied.

FIG. 2 is a diagram showing an installation configuration of an aircraft sensor.

FIG. 3 is a diagram illustrating a vertical knitting wave as a microwave transmission example.

FIG. 4 is a diagram illustrating horizontal knitting waves as an example of microwave transmission.

FIG. 5 is a diagram illustrating circularly polarized waves in which vertical knitting waves and horizontal polarized waves are combined.

FIG. 6 is a configuration diagram showing an embodiment of an aircraft detection device according to the present invention.

FIG. 7 is a diagram illustrating a transmission / reception state by an aircraft sensor.

8 is a timing control diagram for explaining a transmission process of the arithmetic processing control unit shown in FIG.

9 is a diagram illustrating a transmission processing flow of the arithmetic processing control unit illustrated in FIG.

FIG. 10 is a diagram illustrating an example of calculating a threshold value for determining the presence or absence of an aircraft.

FIG. 11 is a plurality of pattern diagrams for determining the presence or absence of an aircraft.

FIG. 12 is a flowchart illustrating a process of detecting the presence / absence of an aircraft.

FIG. 13 is a flowchart illustrating a process of detecting the presence / absence of an aircraft.

FIG. 14 is a diagram showing a display state of a point having a maximum reception level and a maximum reception level of the point.

FIG. 15 is a data array diagram in which the points having the maximum reception level and the maximum reception levels of the points are stored in time series.

16 is a flowchart illustrating an abnormality monitoring process of the microwave circuit unit shown in FIG.

[Explanation of symbols]

4 ... Master station 5 ... Power generator 8 ... Child station 9 ... Aircraft L ... light C ... Aircraft detector 21 ... Aircraft sensor 22 ... Reflector 23 ... Microwave circuit section 25 ... Arithmetic processing control unit 26 ... Storage medium

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hidenori Goto             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office F-term (reference) 2G005 DA04                 5H180 AA26 BB04 CC12 CC14                 5J070 AB01 AD01 AD16 AE04 AH14                       AH19 AK22 AK35 BC30 BG16

Claims (7)

[Claims] 1. The presence / absence of an aircraft moving on the runway or taxiway is detected in order to control lights installed on the runway / taxiway of an airport, and the aircraft presence / absence detection signal is transmitted to the host station. In the aircraft detection device that transmits to the operator console side via a reflector plate installed at a required distance on one side of the runway or taxiway, and a microwave pulse signal by circular polarization toward this reflector plate. Of the reflected wave reflected from either the runway or the taxiway, and the microwave circuit that receives the reflected wave reflected from the reflector that includes one of the runway and the taxiway. When the reception level exceeds a predetermined threshold value, it is determined that there is an aircraft, and an arithmetic processing control unit that transmits an aircraft presence detection signal to the upper master station is provided. Required on the other side of the runway and taxiway. of Aircraft sensing apparatus characterized by comprising a aircraft sensor installed in each release. 2. In order to control the lights installed on the runway and taxiway of an airport, the presence or absence of an aircraft moving on the runway or taxiway is detected, and this aircraft presence / absence detection signal is sent to the upper master station. In the aircraft detection device that transmits to the operator console side via a reflector plate installed at a required distance on one side of the runway or taxiway, and a microwave pulse signal by circular polarization toward this reflector plate. And a microwave circuit for receiving a reflected wave reflected from a reflection plate including one of the runway and the taxiway, and associated with the reflection plate and any one of the runway and the taxiway in advance. The detection area and the reflection area are set, and a reception pattern is created from the magnitude relation between the reception level of the reflected wave from the detection area and the reflection area and a predetermined threshold value, and the reception pattern is predetermined. An arithmetic processing control unit that acquires a detection signal indicating the presence or absence of an aircraft according to which of a number of patterns it belongs to, and an aircraft sensor installed at a required distance on the other side of the runway and taxiway. An aircraft detection device characterized by the above. 3. The aircraft detection device according to claim 1, wherein the arithmetic processing control unit is configured to perform the microwave circuit during a transmission time determined by a distance from the reflector and a transmission frequency. To transmit a microwave pulse signal by circularly polarized wave from the microwave circuit, and receive the reflected wave reflected from the reflection plate including one of the runway and the taxiway, An aircraft detection device, characterized in that it is determined that an aircraft is present when the reception level exceeds a predetermined threshold value. 4. The aircraft detection device according to claim 1, wherein the threshold value is set such that the maximum value of the reception level of the reflected wave in the detection area and the reception of the reflected wave in the reflection area are set periodically. An aircraft detection apparatus, wherein the maximum value of a level is added, and the threshold value is updated using an average value of the added values. 5. The aircraft detection device according to claim 1, wherein the arithmetic processing control unit determines a reception level of a reflected wave received by the microwave circuit, and the maximum reception level is obtained. An aircraft detection device comprising display means for displaying the distance and its maximum reception level. 6. The aircraft detection device according to claim 1, wherein the arithmetic processing control unit constantly monitors the output of a transmission antenna connected to the microwave circuit, and does not output for a predetermined time or longer. The aircraft detection device is characterized in that it is judged to be abnormal and an alarm is displayed. 7. A plurality of patterns representing the presence or absence of an aircraft based on a detection area and a reflection area are stored in advance in addition to a threshold value, a microwave pulse signal by circular polarization is transmitted from a microwave circuit, and a runway, A computer that detects the presence or absence of an aircraft from the reception level received by the microwave circuit that is reflected from a reflector that includes one of the taxiways, and the previous time that the computer is reflected from the detection area and received through the microwave circuit. Detection area maximum value extraction function that extracts the maximum value while comparing the reception level of this time with the reception level of this time, and compares the maximum value extracted by this function with the threshold value, and determines the upper bits of the reception pattern. Patterned detection area patterning function, previous reception level and current reception level received from the reflection area via microwave circuit And a reflection area maximum value extraction function for extracting the maximum value while comparing, and a reflection area patterning function for patterning the lower bits of the reception pattern by comparing the maximum value extracted by this function with the threshold value. A program for realizing an aircraft detection determination function of determining the presence or absence of an aircraft according to which of the plurality of patterns the received pattern obtained by these patterning functions belongs to.