JP2002365126A - System for monitoring noise of aircraft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To know information of an air craft as a generation source of a noise in detail, and to accurately measure the noise over a wide range. SOLUTION: A flight schedule information processor 4 is linked to a central monitoring station 5. Discrimination information for the air craft 7 is recognized in a reception station 2 to be transmitted to the central monitoring station 5, detail information (an aviation company, a flight number, a type of the air craft and the like) corresponding to the discrimination information is read out of the flight schedule information processor 4 through the mediation of the discrimination information, and stored automatically in a memory of the central monitoring station 5 to correspond to noise levels measured by noise measuring stations 3. Data from the stations 3 are selected based on a position of the air craft or a meauring time of the noise to allow use of the noise levels transmitted from the plural noise measuring stations 3, and the noise measuring range is widened thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in an aircraft noise monitoring system.

[0002]

2. Description of the Related Art Aircraft noise monitoring systems for measuring and recording noise generated by aircraft have already been deployed at many airports and the like, but most of them use human noise to determine the correlation between aircraft identification information and noise. Is what you identify and enter into your computer.

As an attempt to automate this kind of work, for example, as disclosed in JP-A-63-308523, the intensity of a signal output from an aircraft is measured, and the intensity is measured to a specified value or more. There is known an aircraft noise measurement method in which the noise level and the identification information of the aircraft are displayed in correspondence with each other in the case of the following.

[0004]

However, in the aircraft noise measuring method described above, the information that can be known in association with the noise level is a signal transmitted directly from the aircraft itself, for example, identification of a call sign or the like. It ’s just information,
There was a drawback in that detailed information on the aircraft, for example, the name of the airline, etc., could not be immediately known.

Further, since it is necessary to measure the intensity of the signal output from the aircraft and the noise measurement at the same point, there is another problem that it is difficult to measure the noise over a wide range.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned disadvantages of the prior art, to obtain detailed information relating to an aircraft which is a source of noise, and to provide a relatively wide range of information. An object of the present invention is to provide an aircraft noise monitoring system capable of accurately measuring aircraft noise.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a receiver for receiving an interrogation signal from a secondary surveillance radar station, intercepting a response signal output from an aircraft, and decoding a response signal received by the receiver. A plurality of receiving stations including a response signal data processing unit that extracts the identification information of the aircraft and outputs the information together with the reception time, and a noise data processing unit that measures the noise level of the aircraft and outputs the data together with data representing a measurement position. A plurality of noise measuring stations, a flight plan information processing apparatus for storing identification information of aircraft flying around and detailed information of the aircraft in association with each other, the receiving station, the noise measuring station, and the flight plan information processing. An aircraft noise monitoring system comprising a central monitoring station communicably linked to each of the devices, wherein the central monitoring station receives identification information output from each of the receiving stations. The position of the aircraft corresponding to the identification information is calculated by the multilateration positioning based on the time difference, and the measurement position and the multilateration positioning specified by the data representing the measurement position output from the noise measurement station are calculated. Is determined to be inconsistent with the position of the aircraft calculated by
A noise monitoring control unit that records the detailed information of the aircraft corresponding to the identification information output from each of the receiving stations and the noise level output from the noise measurement station in a corresponding manner. .

In such a configuration, the receiver of each receiving station intercepts communication performed between the secondary monitoring radar station and the aircraft, and the response signal data processing section decodes the response signal of the aircraft, and Is transmitted to the central monitoring station together with the reception time. On the other hand, the central monitoring station calculates the position of the aircraft corresponding to the identification information by known multilateration positioning based on the deviation of the reception time of the same identification information received from a plurality of receiving stations. Then, the noise data processing section of the noise measuring station constantly measures the noise level of the aircraft, and transmits it to the central monitoring station together with data representing the measurement position. Further, the noise monitoring control unit of the central monitoring station specifies the noise measurement position based on the data representative of the measurement position output from the noise measurement station, and matches the aircraft position calculated by multilateration positioning. Only when the mismatch is determined and the noise measurement position matches the position of the aircraft calculated by the multilateration positioning, the noise level data transmitted from this noise measurement station is used as the position by the multilateration positioning. Is determined to be related to the calculated aircraft. When the position coincidence is confirmed, the noise monitoring control unit of the central monitoring station, based on the identification information of the aircraft whose position has been calculated by multilateration positioning, sends detailed information corresponding to the identification information from the flight plan information processing apparatus. And records the detailed information in association with the noise level transmitted from the noise measuring station. As described above, detailed information is taken out from the flight plan information processing device by using the identification information of the aircraft as an intermediary and stored in association with the noise level. You will be able to know easily and in detail. In addition, since the noise measurement position is specified based on the data representing the measurement position output from the noise measurement station, it is determined whether or not the position coincides with the aircraft position calculated by the multilateration positioning. Even if noise level data is transmitted from noise measurement stations installed at multiple locations, the noise level data transmitted from any of the noise measurement stations is related to the aircraft related to the positioning target at that time. It is possible to accurately determine whether the level is the level. This makes it possible to install a plurality of noise measuring stations and accurately measure aircraft noise over a wide range.

The noise level of the aircraft and the measurement time are associated with each other and transmitted from the noise data processing section of the noise measuring station, and the noise monitoring control section of the central monitoring station controls the identification output from the receiving station. It is determined whether or not the reception time of the information and the measurement time of the noise level output from the noise measurement station match, and only when both match, the detailed information of the aircraft corresponding to the identification information and the information output from the noise measurement station are output. The noise level may be recorded in association with the noise level.

In this case, only when the time when the noise is measured and the time when the aircraft is detected by the receiving station match, the data of the noise level transmitted from the noise measuring station can be obtained from the aircraft detected by the receiving station. Will be determined. When the time coincidence is confirmed, the noise monitoring control unit of the central monitoring station extracts the detailed information corresponding to the identification information from the flight plan information processing device based on the identification information of the aircraft detected by the receiving station. The detailed information is recorded in association with the noise level transmitted from the noise measuring station. As described above, it is possible to easily and in detail know information related to the aircraft that is the source of the noise,
Even if noise level data is transmitted from noise measurement stations installed at multiple locations, the noise level data transmitted from any of the noise measurement stations indicates the noise level of the aircraft to be detected at that time. The level can be determined.

Further, the noise level of the aircraft, the data representative of the measurement position and the measurement time are made to correspond to each other and transmitted from the noise data processing section of the noise measurement station. Of the measurement position of the aircraft and the position of the aircraft, and the mismatch of the reception time of the identification information and the measurement time of the noise level, and correspond to the identification information only when both the position and the time match. It is also possible to record the detailed aircraft information and the noise level output from the noise measuring station in association with each other.

In the same manner as described above, it is possible to easily and in detail know information relating to the aircraft that is the source of noise.
In addition, since the presence or absence of correlation between noise and aircraft is determined by double check based on the reception time and position, the noise level data is transmitted from noise measurement stations installed at multiple locations. Even so, it is possible to determine very accurately which noise level data transmitted from which noise measuring station is the noise level relating to the aircraft to be positioned at the time.

Here, as the data representing the measurement position, a unique identification code set for each noise measurement station can be used. When such a configuration is applied, a file unit storing the identification code and the position data of the measurement area in association with each other is registered in the noise monitoring control unit in advance.

In this case, the noise monitoring control section of the central monitoring station refers to the file means based on the unique identification code transmitted from the noise measuring station and specifies the measurement position.

The position data of the measurement area can be constituted by polar coordinate data indicating a direction and a distance from the reference position to the noise measuring station, and radius data indicating a measuring range around the noise measuring station.

Of course, it is also possible to use a combination of coordinate data indicating the noise measuring station and radius data indicating the measuring range.

The flight plan information processing apparatus can store an airline name, flight number, aircraft model, and the like as detailed information.

In this case, the airline name, flight number, aircraft model, etc. are recorded in the noise monitoring control section of the central monitoring station in correspondence with the data of the noise level.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram showing an outline of the configuration of an embodiment of an aircraft noise monitoring system to which the present invention is applied.

This aircraft noise monitoring system 1 comprises a plurality of receiving stations 2 and a noise measuring station 3, as shown in FIG.
It is constituted by one flight plan information processing device 4 and a central monitoring station 5. Each component is communicably linked by radio or the like, and the flight plan information processing device 4 previously stores identification information (call sign and the like) of a large number of aircraft 7 flying around and detailed information of the aircraft 7. Correspondingly input and stored. The detailed information of the aircraft 7 here is, for example, an airline name, flight number, aircraft model, and the like.

The secondary surveillance radar station 6 exchanges an interrogation signal and a response signal with the aircraft 7 to track the route of the aircraft. As is well known in the art, a dipole antenna and an SSR receiver are used. , And various processing devices.

Each of the receiving stations 2 constituting a part of the aircraft noise monitoring system 1 is, as shown in FIG.
Antenna section 8 for intercepting a response signal from the satellite, a receiver (SSR receiver) 9 having substantially the same function as that provided by the secondary surveillance radar station 6, and a response signal intercepted by the receiver 9. Signal data processing unit 10 for decoding the identification information of the aircraft 7 and extracting other information (altitude information, etc.)
And a transmission unit 1 which is a part of the response signal data processing unit 10.
0 ′ and the system timing generator 11. The transmission unit 10 'includes the response signal data processing unit 1
It is a signal output unit for attaching the data of the reception time (absolute time) of the response signal to the identification information and other information decoded at 0 and transmitting the data to the central monitoring station 5. Further, the system timing generator 11 is means for synchronizing the operation timing of the receiver 9 with the repetition frequency of the nearby secondary monitoring radar station 6. Normally, three or more receiving stations 2 are required to measure the position of the aircraft 7 by multilateration positioning. However, the secondary monitoring radar station 6 or S
The central monitoring station 5 in which the SR receiver is installed can also have the function of the receiving station 2.

As shown in FIG. 3, each of the noise measuring stations 3 constituting a part of the aircraft noise monitoring system 1 includes a sound collecting microphone 12 for collecting noise of the aircraft 7 and a sound collecting microphone 1
The noise data processing unit 13 measures the noise level based on the output from the control unit 2 and a transmission unit 13 'which is a part of the noise data processing unit 13. The transmission unit 13 '
It is a signal output unit for attaching the data representing the measurement position and the data of the measurement time (absolute time) to the central monitoring station 5 with the noise level data measured by the noise data processing unit 13 attached. In the present embodiment, an identification code unique to each noise measurement station 3 is used as data representing the measurement position. There is no particular limitation on the number of noise measuring stations 3 to be installed.

As shown in FIG. 4, a central monitoring station 5 which forms a part of the aircraft noise monitoring system 1 has a transmission unit 14 for receiving data transmitted from the receiving station 2 and the noise measuring station 3. , A noise monitoring control unit 15 including a microprocessor, various storage devices, a monitor display, and the like. Each of the receiving stations 2
A function of calculating the position of the aircraft 7 by multi-lateration positioning based on a difference in reception time of the identification information output from the device, a function of specifying the measurement position based on the identification code output from the noise measurement station 3, and A function of determining whether or not the position of the aircraft 7 calculated by the multi-lateration positioning matches the measured position specified on the basis of the identification code, a reception time of the identification information of the aircraft 7 output from the receiving station 2, A function of determining whether or not the noise level output from the noise measuring station 3 matches the measurement time; and, when both the position and the time match, the detailed information of the aircraft 7 corresponding to the identification information is used for flight plan information processing. A function of reading from the device 4 and recording it in the storage device of the noise monitoring control unit 15 in correspondence with the noise level is provided. Each of these functions is realized by a microprocessor and a storage device provided in the noise monitoring control unit 15.

FIG. 8 shows an example of data for specifying the measurement position based on the identification code output from the noise measuring station 3. As shown in FIG. 8, in the present embodiment,
The measurement area of each noise measuring station 3 is defined as a direction θ from the airport serving as a reference position to each noise measuring station 3, a distance r, and
It is represented by radius data d indicating a measurement area around each noise measurement station 3. Define the measurement area (θ,
The number of data sets of (r, d) is equal to the number of noise measurement stations 3, and the values of (θ, r, d) correspond one-to-one to the identification codes of the noise measurement stations 3. Since the correspondence between (θ, r, d) and the identification code is registered in the storage device of the noise monitoring control unit 15 in advance, the noise monitoring control unit 15 The measurement area of the noise measuring station 3 can be specified.

The outline of the processing executed by the microprocessor of the noise monitoring control unit 15 will be described below with reference to FIGS.
The details of various functions of the noise monitoring control unit 15 will be described with reference to the flowchart of FIG.

The reception processing 1 shown in FIG. 5 is a flowchart showing the outline of the processing required for the central monitoring station 5 to receive data from the reception station 2 and execute multilateration positioning. Also, the reception processing 2 shown in FIG.
7 is a flowchart showing an outline of a process required for the central monitoring station 5 to receive and store data from the noise measuring station 3. The noise level registration process shown in FIG. 9 is a flowchart illustrating an outline of a process for storing the relationship between the detailed information of the aircraft 7 and the noise level in the storage device of the noise monitoring and control unit 15. These processes are repeatedly executed by the microprocessor of the noise monitoring control unit 15 as a multitask process at predetermined intervals.

The microprocessor that has started the reception processing 1 first determines whether or not the value 2 for temporarily stopping the reading of the identification information from the receiving station 2 is set in the identification information reading adjustment flag F1 (step S1). a1) Since the initial value of the identification information read adjustment flag F1 is 0, the step a is inevitable immediately after the start of the microprocessor.
The judgment result of 1 is false.

Therefore, the microprocessor sets the initial value to 0.
Of the receiving station RX based on the current value of the receiving station search index i of
It is determined whether or not the data from (i) has been input (step a2). If the data from the receiving station RX (i) has not been input, the microprocessor
The value of the receiving station search index i is incremented by 1 (step a9), and it is determined whether the value of the index i exceeds the set value n (step a10). Here, if the value of the index i does not exceed the set value n, the microprocessor holds the value of the index i as it is, and
Is completed, and if the value of the index i exceeds the set value n, the microprocessor resets the value of the index i to the initial value 0 (step a11), and then performs the reception process 1 in the processing cycle. To end.

In this embodiment, RX (0) to RX (0)
Although it is assumed that there are (n + 1) receiving stations 2 up to (n), as shown in FIG.
Is sufficient if n is three, so the substantial value of n is 2.

As described above, the receiving process 1 is repeatedly executed at predetermined intervals, and each time the receiving station search index i
Is automatically changed by 1 in the range of 0 to n,
The presence or absence of data transmission from all the receiving stations 2 of RX (0) to RX (n) is confirmed.

If the data input from the receiving station RX (i) is confirmed in the determination processing of step a2 while such processing is repeatedly executed, the microprocessor sets the identification information read adjustment flag F1 to the initial value 0. Is set, in short, this data input is first performed by the aircraft 7
It is determined whether or not the received signal is from the receiving station 2 which has detected the approach (step a3). Assuming that the (n + 1) receiving stations 2 are arranged in a line in an array as shown in FIG. 1, when the aircraft 7 approaches from above, the data is transmitted first from the receiving station RX (0). When the aircraft 7 approaches from below the page, data is transmitted first from the receiving station RX (n).

If the result of the determination at step a3 is true, it means that the current data input is from the receiving station 2 which first detected the approach of the aircraft 7, and the microprocessor 7 First, the identification information of the aircraft 7 included in the data transmitted from the receiving station RX (i) is
The identification information storage register C is updated and stored as identification information of the aircraft 7 to be subjected to multi-lateration positioning (step a4), and a value 1 indicating that data collection for multi-lateration positioning has started is identified. The information read adjustment flag F1 is set (step a5).

The microprocessor further updates and stores the reception time included in the data transmitted from the reception station RX (i) in the reception time storage register T (i) (step a6), and obtains the reception time. The value of the counter X of the initial value 0 for storing the number is incremented by 1 (step a7),
It is determined whether or not the current value of the counter X is less than the set value n, that is, whether or not data relating to the aircraft 7 to be positioned has been input from all of the (n + 1) receiving stations 2. (Step a8).

If the result of the determination in step a8 is true, it means that there is still a receiving station 2 that has not transmitted data relating to the aircraft 7 to be located, and the microprocessor In the same manner as described above, the value of the receiving station search index i is updated, and the receiving process 1 is repeatedly executed at predetermined intervals, and the aircraft 7 to be located is determined.
It waits for data on the aircraft 7 to be input from the receiving station 2 that has not transmitted the data on the aircraft 7. During this time, the value of the identification information read adjustment flag F1 is held at 1, so that the value of the identification information stored in the identification information storage register C is not accidentally rewritten.

While such processing is repeated, data on the aircraft 7 to be positioned is
The counter X is transmitted from all of the (n + 1) receiving stations 2.
Reaches a set value n and the result of the determination in step a8 becomes false, the microprocessor averages the reception times stored in the reception time storage registers T (i) for i = 0 to n and determines the average as the positioning target. Substantial detection time T of the aircraft 7
_RX is obtained (step a12), and furthermore, the deviation of the reception time of the response signal occurring between the receiving stations 2 is obtained from the reception times stored in the reception time storage registers T (i) for i = 0 to n. The current position (θ _RX , r _RX ) of the aircraft 7 to be located is calculated by applying conventionally known multilateration positioning (step a13). The coordinate position of each receiving station 2 is stored in advance in the storage device of the noise monitoring control unit 15, and the receiving time of each receiving station 2 is also a receiving time storage register using the value of the receiving station search index i as a parameter. The operation is reliable because it is specified by T (i). The calculation processing related to the multi-lateration positioning is already known, and thus the description is omitted.

The microprocessor that has obtained the current position (θ _RX , r _RX ) of the aircraft 7 to be positioned initializes the value of a counter X storing the number of acquisitions of the reception time to 0 (step a14). The value 2 for temporarily stopping the reading of the identification information from the receiving station 2 is set to the identification information read adjustment flag F
1 (step a15), and the receiving process 1 in the processing cycle ends.

Finally, in the noise level registration process described later, the final noise data registration process is performed using the data acquired using the reception process 1 and the reception process 2 described later. Until the registration process is completed, the determination result of step a1 in the reception process 1 is held in a true state, so that the value of the identification information C of the positioning target aircraft 7 obtained as described above, The value of the data reception time T _RX of this aircraft 7 and the position (θ
_RX , r _RX ) is retained without being rewritten. Note that the timing at which the identification information read adjustment flag F1 is reset to the initial value 0 is the time when the recording of the noise relating to the aircraft 7 to be positioned at this time is completed in a noise level registration process described later.

On the other hand, in the reception processing 2 shown in FIG. 6, the microprocessor first determines the noise monitoring station VX (j) based on the current value of the noise monitoring station search index j of the initial value 0.
Then, it is determined whether or not the data from is input (step b1). If the data from the noise monitoring station VX (j) has not been input, the microprocessor increments the value of the noise monitoring station search index j by 1 (step b5), and the value of the index j changes the set value m. It is determined whether or not it has exceeded (step b6). Here, if the value of the index j does not exceed the set value m, the microprocessor holds the value of the index j as it is and
Is completed, and if the value of the index j exceeds the set value m, the microprocessor resets the value of the index j to the initial value 0 (step b7), and then performs the reception process 2 in the processing cycle. To end.

In this embodiment, as shown in FIG. 1, the noise monitoring stations VX (0) to VX (m) have m +
It is assumed that one noise monitoring station 3 exists.

As described above, the reception process 2 is repeatedly executed at predetermined intervals. Each time, the value of the noise monitoring station search index j is automatically changed by one in the range of 0 to m. The presence or absence of data transmission from all the noise monitoring stations 3 of (0) to VX (m) is confirmed.

When the data input from the noise monitoring station VX (j) is confirmed in the determination processing in step b1 while such processing is repeatedly executed, the microprocessor firstly checks the noise monitoring station VX (j). ) Is updated and stored in the noise monitoring station identification data storage register S (j) (step b2).
The measurement time is stored in the measurement time storage register t (j), and the value of the noise level is stored in the noise level storage register V (j).
(J) is updated and stored (step b3, step b4).

As a result of the above processing being repeatedly executed, V
Each of the measurement time storage registers t (0) to t (m) and the noise level storage registers V (0) to V (m) for storing data from the noise monitoring station 3 of X (0) to VX (m). In this case, the latest noise measurement time and noise level data are constantly updated and stored.

The noise level registration process shown in FIG. 7 is a process performed by using various data obtained in the above-described reception process 1 and reception process 2.

The microprocessor that has started the noise level registration processing first determines whether or not data is stored in the register (θ _RX , r _RX ) for storing the current position of the aircraft 7 to be located. (Step c1).

Here, if no data is stored in the register (θ _RX , r _RX ), that is, if the result of the determination in step c1 is true, the position of the aircraft 7 whose noise is to be measured is determined. Since this means that the calculation has not been completed, the microprocessor skips the processing after step c2 and ends the noise level registration processing in the processing cycle. In this case, the registration process relating to the association between the detailed information of the aircraft 7 and the noise is substantially not executed.

On the other hand, if the data is stored in the register (θ _RX , r _RX ), it means that the calculation of the position of the aircraft 7 whose noise is to be measured has been completed. Then, the noise level registration process is continued.

In this case, the microprocessor first
The identification information C of the positioning target aircraft 7, the current position (θ _RX , r _RX ) of the aircraft 7 and the substantial detection time T _RX of the aircraft 7 are read from each register (step c).
2), the measurement time search index k is initialized to 0 (step c)
3) The value of the measurement time stored in the measurement time storage register t (k) is read based on the current value of the index k (step c4), and the measurement time t (k) is used as the positioning target aircraft 7
Whether or not the actual detection time T _RX of the identification information C about the identification information C substantially matches the flight time of the positioning target aircraft 7 having the identification information C and the measurement time of the noise. Is determined (step c5).

If the result of the determination at step c5 is false, the noise data V measured at time t (k) by the noise measuring station 3 having the identification data S (k) is obtained.
Since (k) means that it is not the one of the positioning target aircraft 7 having the identification information C, the microprocessor increments the value of the measurement time search index k by 1 (step c9), and then sets the value of the index k. Is determined to have reached the set value n (step c10). If the value of the index k has not reached the set value n, the value of the measurement time storage register t (k) corresponding to the current value of the index k is determined. The value is read (step c4), and the same processing as described above is repeatedly executed.

Then, while repeating such processing,
Flight time T of aircraft 7 to be located having identification information C
A noise measuring station VX that measures noise at a time substantially coincident with _RX.
(K) is detected, the decision result in the step c5 is true, the microprocessor is based on the current value of the measurement time search index k, noise monitoring station to measure the noise in the flight time T _RX substantially matching time 3 (step c6), and the data (θ, r, d) indicating the measurement area of the noise monitoring station 3 corresponding to the identification data S (k) is read by the noise monitoring controller 15 The current position (θ _RX , r _RX ) of the positioning target aircraft 7 having the identification information C is read from the storage device (step c7) and enters the measurement area of the noise monitoring station 3 corresponding to the identification data S (k). It is determined whether or not it has been performed (step c8).

If the result of the determination in step c8 is false, the noise data V measured at the time t (k) by the noise measuring station 3 having the identification data S (k) is obtained.
Since (k) means that it is not the one of the positioning target aircraft 7 having the identification information C, the microprocessor
After incrementing the value of the measurement time search index k by 1 (step c9), it is determined whether or not the value of the index k has reached the set value n (step c10), and the value of the index k has reached the set value n. If not, the same processing as described above is repeatedly executed, and the current position (θ _RX , r
_(RX ) is searched for the noise measuring station 3 having the measurement area (θ, r, d).

In this manner, the correspondence between the aircraft 7 and the noise is double-checked in consideration of the relationship between the noise measurement time and the measurement area, so that a plurality of noise monitoring stations 3 measure the noise at the same time. Even in such a case, noise of another aircraft or the like is not erroneously registered as noise of the aircraft 7 to be positioned.

While repeating such processing,
Flight time T of aircraft 7 to be located having identification information C
_The noise measurement station VX () has a measurement time t (k) substantially coincident with _RX and has a measurement area (θ, r, d) including the current position (θ _RX , r _RX ) of the aircraft 7 to be positioned. k) is detected, and when the determination result of step c8 becomes true, the microprocessor based on the current value of the measurement time search index k, the noise level data V corresponding to the positioning target aircraft 7 having the identification information C, (K) is read (step c1)
3) Further, based on the identification information C, the detailed information stored in the flight plan information processing device 4 corresponding to the identification information C, that is, the airline name and flight corresponding to the aircraft 7 to be positioned Read the name, aircraft model, etc. (step c1
4), detailed information, measurement time t (k), identification data S of the noise monitoring station 3 corresponding to the identification information C of the aircraft 7
(K) (the noise measurement position) and the noise level value V (k) are additionally registered in the data file of the storage device of the noise monitoring controller 15 (step c15).

However, in the processing described above, step c1
If the determination result of 0 is true, the noise of the aircraft 7 whose position is detected at that time is extremely low. Has not been detected, or the aircraft 7 has j =
Since it means that it does not enter the measurement area of any of the noise monitoring stations 3 of 0 to m, Step c13 to Step c1
The process of No. 5 is not executed, and the registration of the noise level is not performed.

After the registration of the correspondence between the detailed information of the aircraft 7 and the noise level is completed as described above, or after the determination result of step c10 becomes true, the microprocessor determines the current position of the aircraft 7 Register to be stored (θ
_RX , r _RX ) is reset to a null state (step c1).
1) Further, the identification information read adjustment flag F1 is reset to the initial value 0, and the reading of the identification information in the above-described reception processing 1 is restarted (step c12), and the noise level registration processing in the cycle ends.

Substantial processing in the noise level registration processing, that is, the processing after step c2 is executed again, because the next aircraft 7 in the above-described reception processing 1 is executed again.
Is detected, and the current position (θ
_RX , r _RX ).

However, the next aircraft 7 referred to here is not necessarily the step c in the above-described noise level registration processing.
It is not necessary that the aircraft be another aircraft than the aircraft 7 that registered the noise in the process of No. 15. For example, if the aircraft 7 having the same identification information is continuously detected by the receiving station 2, if the aircraft 7 stays within the measurement area of the same noise measuring station 3, the identification information C and the details Among the information, the measurement time t (k), the identification data S (k) of the noise monitoring station 3 (the noise measurement position), and the noise level value V (k), the measurement time t (k) and the noise level value V If the data in which only (k) has changed is registered in the storage device of the noise monitoring control unit 15 continuously, and if the aircraft 7 has moved to the measurement area of another noise measurement station 3, the identification information C , Detailed information, measurement time t (k), identification data S (k) of noise monitoring station 3
(Measurement position of noise), value of noise level V (k)
Measurement time t (k) and identification data S (k) of noise monitoring station 3
The data in which only the (noise measurement position) and the noise level value V (k) have changed are registered in the storage device of the noise monitoring controller 15 continuously.

In the process of step a4 in the reception process 1, the aircraft 7
Since other data included in the response signal from the server, for example, altitude data and the like are also received, the altitude data and the like are simultaneously registered in association with the identification information C in step c15 in the noise level registration processing. It is possible.

The data registered in the storage device of the noise monitoring control unit 15 in this way is appropriately sorted by a conventionally known process and stored in a database. For example, conditions such as airline name, flight name, aircraft model, etc. By inputting to the noise monitoring and control unit 15 conditions such as designation, or the designation of the range of the noise level and the measurement time zone, the noise monitoring and control unit 15 can display or print out the information on the monitor display. Yes, and if necessary, statistical processing can be performed.

[0060]

According to the aircraft noise monitoring system of the present invention, detailed information is taken out from the flight plan information processing device by using the identification information of the aircraft as an intermediary, and automatically stored in association with the noise level measured by the noise measuring station. Information about the aircraft that is generating the noise,
For example, it is possible to easily and in detail know the name of the airline, flight number, aircraft model, and the like.

Further, the noise measurement position is specified based on data representing the measurement position output from the noise measurement station,
Judgment of mismatch with the position of the aircraft calculated by multilateration positioning, or mismatch of the reception time of the identification information output from the receiving station with the measurement time of the noise level output from the noise measurement station Therefore, even if noise level data is transmitted from noise measurement stations installed at multiple locations, the noise level data transmitted from any noise measurement station is determined as the positioning target. It is possible to accurately determine whether or not the noise level is related to the aircraft in question, and it is possible to install a plurality of noise measuring stations and accurately measure the noise of the aircraft over a wide range.

In addition, a unique identification code set for each noise measuring station is used as data representative of the measurement position, and the identification code and the position data of the measurement area are stored in correspondence with file means. Since a new measurement area is required, even if a noise measurement station is added, abolished, or relocated, it is only necessary to update the data inside the central monitoring station, and the system can flexibly respond. It is possible.

The position data of the measurement area is composed of polar coordinate data indicating the direction and distance from the reference position to the noise measurement station and radius data indicating the measurement range centered on the noise measurement station. It is possible to easily cope with a change of station or a change in the characteristics of the sound collecting microphone (change in the size of the measurement area) installed in the noise measurement station.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an outline of a configuration of an embodiment of an aircraft noise monitoring system to which the present invention is applied.

FIG. 2 is a functional block diagram schematically showing a configuration of a receiving station in the aircraft noise monitoring system of the embodiment.

FIG. 3 is a functional block diagram schematically showing a configuration of a noise measuring station in the aircraft noise monitoring system of the embodiment.

FIG. 4 is a functional block diagram schematically showing a configuration of a central monitoring station in the aircraft noise monitoring system of the embodiment.

FIG. 5 is a flowchart showing an outline of processing required for a central monitoring station to receive data from a receiving station and execute multilateration positioning.

FIG. 6 is a flowchart showing an outline of processing required for a central monitoring station to receive and store data from a noise measuring station.

FIG. 7 is a flowchart showing an outline of a process for the central monitoring station to store the detailed information of the aircraft and the noise level in the storage device in association with each other.

FIG. 8 is a conceptual diagram showing an example of data for specifying a measurement position based on an identification code output from a noise measuring station.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aircraft noise monitoring system 2 Receiving station 3 Noise measuring station 4 Flight plan information processing device 5 Central monitoring station 6 Secondary monitoring radar station 7 Aircraft 8 Antenna unit 9 Receiver (SSR receiver) 10 Response signal data processing unit 10 'Transmission Unit 11 System timing generation unit 12 Sound collection microphone 13 Noise data processing unit 13 'Transmission unit 14 Transmission unit 15 Noise monitoring control unit

Claims (6)

[Claims] 1. A receiver for receiving an interrogation signal from a secondary surveillance radar station, intercepting a response signal output by an aircraft, decoding a response signal received by the receiver, and extracting identification information of the aircraft. A plurality of receiving stations having a response signal data processing unit that outputs the reception time, and a plurality of noise measurement stations having a noise data processing unit that measures the noise level of the aircraft and outputs the data together with data representing the measurement position. A flight plan information processing apparatus that stores aircraft identification information and detailed information of the aircraft in association with each other; a central station communicably linked to each of the reception station, the noise measurement station, and the flight plan information processing apparatus. An aircraft noise monitoring system including a monitoring station, wherein the central monitoring station includes a multilateration system based on a difference between reception times of identification information output from the reception stations. The position of the aircraft corresponding to the identification information is calculated by the position, and the position of the aircraft calculated by the multilateration positioning and the measurement position specified by the data representative of the measurement position output from the noise measurement station are calculated. The noise is determined by determining whether or not the two coincide with each other, and only when the two coincide with each other, the detailed information of the aircraft corresponding to the identification information output from each of the receiving stations and the noise level output from the noise measuring station are recorded in association with each other. An aircraft noise monitoring system comprising a monitoring control unit. 2. A receiver for receiving an interrogation signal from a secondary surveillance radar station and intercepting a response signal output by an aircraft, and decoding the response signal received by the receiver to extract identification information of the aircraft. A plurality of receiving stations equipped with a response signal data processing unit for outputting the received time, and a plurality of noise measuring stations equipped with a noise data processing unit for measuring the noise level of the aircraft and outputting the measured time together with the aircraft identification information And a flight plan information processing device for storing the detailed information of the aircraft in association with each other, and a central monitoring station linked to the receiving station, the noise measurement station, and the flight plan information processing device so as to be able to perform data communication. An aircraft noise monitoring system, wherein the central monitoring station has a reception time of the identification information output from each of the reception stations and a measurement of the noise level output from the noise measurement station. Is determined, and only when the two match, the detailed information of the aircraft corresponding to the identification information output from each of the receiving stations and the noise level output from the noise measuring station are recorded in association with each other. An aircraft noise monitoring system, comprising: 3. A receiver for receiving an interrogation signal from a secondary surveillance radar station and intercepting a response signal output by the aircraft, and decoding the response signal received by the receiver to extract identification information of the aircraft. A plurality of receiving stations each having a response signal data processing section that outputs the received time, and a plurality of noise measurement sections each including a data representing a measurement position by measuring an aircraft noise level and a noise data processing section that outputs the data together with the measurement time. A flight plan information processing device that stores the identification information of the aircraft and the detailed information of the aircraft in association with each other; a data communication link to each of the reception station, the noise measurement station, and the flight plan information processing device. An aircraft noise monitoring system comprising: a central monitoring station configured to receive the identification information output from each of the receiving stations based on a difference between reception times of the identification information. The position of the aircraft corresponding to the identification information is calculated by the telemetry positioning, and the measurement position specified by the data representative of the measurement position output from the noise measurement station and the position of the aircraft calculated by the multilateration positioning And the reception time of the identification information output from each of the receiving stations and the measurement time of the noise level output from the noise measurement station are determined, and the positions and times of the respective locations match. And a noise monitoring control unit that records the detailed information of the aircraft corresponding to the identification information output from each reception station and the noise level output from the noise measurement station in correspondence with each other. Aircraft noise monitoring system. 4. The data representing the measurement position is constituted by an identification code unique to each noise measurement station, and the noise monitoring control unit stores a file storing the identification code and the position data of the measurement area in a corresponding manner. 4. An aircraft noise monitor according to claim 1, further comprising means for specifying position data of a measurement area based on said identification code output from said noise measurement station. system. 5. The position data of the measurement area is constituted by polar coordinate data indicating a direction and a distance from a reference position to the noise measurement station, and radius data indicating a measurement range centered on the noise measurement station. The aircraft noise monitoring system according to claim 4, wherein: 6. The detailed information according to claim 1, wherein the detailed information includes at least an airline name, a flight number, and an aircraft model. Item 6. An aircraft noise monitoring system according to Item 5.