JP2012163418A - Tactical air navigation-ground device, and reception signal monitoring method and reception signal monitoring program that are used for the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tactical air navigation-ground device allowing a normal operation even if there is a disturbance wave when receiving a distance query wave from a tactical air navigation-airborne device.SOLUTION: If a CW disturbance wave is included when a reception signal rs extracted by reception signal acquisition means (a circulator 14) is monitored for each azimuth by reception signal monitoring means (an interference monitoring part 16 and a coaxial switch 17), a reception signal rs of an azimuth where the CW disturbance wave exists is shut off and reception signals rs of azimuths where no CW disturbance wave exists are extracted to be synthesized by reception signal synthesis means (a synthesizer 18) to be output as a synthesis signal cs. The synthesis signal cs is received by reception means (a receiver 19) to be output as a receiver output signal rm. After elapsing a predetermined delay period, a response transmission signal (a response transmission pulse ps) is output in response to the reception signal rs by transmission means (a transmitter 11). The response transmission pulse ps is monitored by a monitor part 20.

Description

  The present invention relates to a TACAN (Tactical Air Navigation) ground device, a received signal monitoring method and a received signal monitoring program used for the device, and in particular, a distance from the Takan onboard device to the Takan ground device. The present invention relates to a Takan ground device suitable for use in the case where an interference wave from an interference source is present when receiving a distance inquiry radio wave for inquiring, a received signal monitoring method and a received signal monitoring program used in the device.

  The Takan ground device receives a distance inquiry radio wave for asking a distance from the Takan onboard device to the Takan ground device, and transmits a response radio wave for the same distance inquiry radio wave. Thereafter, the on-machine device measures the distance to the Takan ground device based on the passage of time from when the distance interrogation radio wave is emitted until the response radio wave is received. Moreover, in the above-mentioned Takan ground device, in order to constantly monitor the operation status of the device, it repeatedly generates a question signal (self-diagnostic question wave) and inputs it to the receiver, and transmits a response after a specified delay time. Self-diagnosis is performed by monitoring the pulse. If this response transmission pulse is other than a response after a specified delay time, the Takan ground equipment makes a self-diagnosis as an abnormal operation. If this abnormal state continues for a specified time or longer, the operation is stopped (shut down).

For example, as shown in FIG. 3, this type of Takan ground apparatus includes a transmitter 1, a distributor 2, a modulator 3, a circulator 4, an antenna 5, a receiver 6, and a monitor unit 7. And selected by the on-machine device 8. In the antenna 5, as shown in FIG. 4, a plurality of column arrays 5a are arranged on the circumference.
In this Takan ground device, the distance interrogation radio wave qa generated from the Takan onboard device 8 is received by the column array 5a of the antenna 5, and is input to the receiver 6 by the circulator 4 through the modulator 3 and the distributor 2. Further, when there is no CW interference wave, the self-diagnosis interrogation radio wave qb is input to the receiver 6 together with the distance interrogation radio wave qa and is determined as a self-diagnosis interrogation signal. As shown in FIG. After time Td, a response transmission pulse ps is generated from the transmitter 1, and a response radio wave dp (that is, a takan direction signal) is transmitted to the on-machine device 8 via the circulator 4, the distributor 2, the modulator 3 and the antenna 5. The In this case, when the time interval between the self-diagnosis interrogation radio wave qb and the response transmission pulse ps is measured by the monitor unit 7 and the response transmission pulse ps is normally output after the specified system delay time Td, it is determined as normal. The

  On the other hand, as shown in FIG. 4, when there is an interference source F in a specific direction with respect to the antenna 5, CW interference waves are mixed in the column array 5 a facing each other. In this case, the CW interference wave is mixed in the receiver 6 as it is. As shown in FIG. 6, when the level of the CW interference wave mixed from the outside is higher than the self-diagnosis interrogation radio wave qb, the receiver 6 does not process it as a self-diagnosis interrogation signal. Transmission pulse ps does not occur. For this reason, since the response transmission pulse ps does not exist after the system delay time Td with reference to the self-diagnosis interrogation radio wave qb, the monitor unit 7 determines that it is abnormal. When this abnormal state continues for a specified time or longer, this Takan ground device stops operation.

In addition to the above-mentioned Takan ground device, as this type of related technology, for example, there is a receiving device described in Patent Document 1.
In this receiving apparatus, an incoming radio wave is received by the N antenna elements by the antenna unit, and the azimuth information of all the incoming radio waves is measured for the N element antenna signal by the azimuth measuring circuit. By the signal comparison circuit, the signal levels and frequency components of the incoming radio waves of all N element antenna signals are analyzed based on the azimuth information, and compared with the analysis information of each of the desired wave and interference wave held in advance, A radio wave reception signal is classified into a desired wave and an interference wave. The interference wave suppression circuit captures the N element antenna signal from the antenna unit, suppresses the signal in the direction of arrival of the interference wave using the DCMP (Directionally Constrained Minimization Power) method based on the signal comparison result, and only the signal in the direction of arrival of the desired wave Is extracted, and the demodulated circuit demodulates the extracted signal to obtain an information signal transmitted by the desired wave.

  Further, in the electronic scanning antenna described in Patent Document 2, a part of the opening of the cylindrical antenna is used to form an interference wave suppression pattern having a level higher than the side lobe of the directivity pattern, and the pattern is switched on the circumference. Used.

  In the Takan antenna direction monitoring device described in Patent Document 3, for example, when monitoring the direction of an electronic scanning type Takan antenna, the phase change of a variable direction signal and the phase change of a carrier wave are monitored. When monitoring the phase change of the variable azimuth signal, the pickup signal (pulse signal) from the 36 array antenna is detected, and the transmission level of each array antenna is detected by the peak hold circuit. Then, this transmission level signal (peak level signal) is digitally phase-corrected and synthesized, the waveform analysis of the variable azimuth signal is performed, and the change in azimuth (phase) is monitored. When monitoring the change in the carrier phase, the pickup signal from the array antenna is mixed with the local signal, and the phase change is monitored by the phase detector.

  Further, in the transponder device described in Patent Document 4, since the frequency component of the CW signal is detected, the accuracy is improved as compared with the detection method based on time, and the suppression of CW interference of the interrogation pulse from the onboard device and The interrogation pulse embedded in the disturbing CW signal can be detected, and the problem of operation stop is solved.

  Further, in the transponder device described in Patent Document 5, if the leakage of the CW signal superimposed on the interrogation signal is very small, the IF amplifier output is output. If the leakage of the CW signal is large, the antilogarithmic amplifier output is output. Since the analog switch is selectively connected, the CW interference of the interrogation signal is suppressed even when the leakage of the CW signal is large.

JP 2007-174206 A Japanese Patent Laid-Open No. 04-084502 Japanese Patent Laid-Open No. 10-160813 Japanese Patent No. 2600688 Japanese Patent Publication No. 07-018922

However, the related technology has the following problems.
That is, in the Takan ground apparatus of FIG. 3, since the antenna 5 is omnidirectional, it is likely to receive CW interference waves from all directions. For this reason, when a CW interference wave having a signal level equal to or higher than the signal level of the self-diagnosis interrogation radio wave qb is mixed even from one direction, the receiver 6 cannot receive the self-diagnosis interrogation radio wave qb, and the response transmission pulse ps is transmitted from the transmitter 1. Since it does not occur, there is a problem that the operation is stopped.

  Further, in the receiving apparatus described in Patent Document 1, even if the direction of arrival of the radio wave fluctuates, the desired wave and the interference wave that are close together are distinguished from each other, only the interference wave is suppressed, and the desired wave is exclusively used. In addition to being configured to suppress interference waves, the configuration and processing method are different from the present invention.

  In the electronic scanning antenna described in Patent Document 2, it is possible to suppress the interference wave without increasing the antenna, and a high gain interference wave suppression pattern is formed, so that the suppression effect on the interference wave is remarkably improved. However, in the same manner as Patent Document 1, the configuration and processing method are different from the present invention in addition to the configuration for suppressing the interference wave.

  The Takan antenna monitoring apparatus described in Patent Document 3 has a simple hardware configuration, but differs in configuration and processing method from the present invention, and does not improve the above problems.

  The transponder device described in Patent Document 4 has a problem that it does not have a function to solve the problem of operation stop when an interference wave having an unacceptable intensity occurs in operation.

  In the transponder device described in Patent Document 5, even when the leakage of the CW signal is large, the CW interference of the interrogation signal is suppressed. However, there is a problem that it does not have a function to solve the problem leading to the operation stop.

  The present invention has been made in view of the above circumstances, and when receiving a self-diagnosis interrogation radio wave or a distance interrogation radio wave of a Takan on-board device, even if there is an interfering wave, the Takan ground device operates normally. An object of the present invention is to provide a received signal monitoring method and a received signal monitoring program used in the apparatus.

  In order to solve the above-mentioned problems, a first configuration of the present invention relates to a Takan ground device, and a self-diagnosis interrogation radio wave that repeatedly generates a self-diagnosis interrogation radio wave and a self-diagnosis interrogation radio wave. A self-diagnostic reception signal corresponding to the self-diagnosis interrogation radio wave received by the antenna, and transmitted from a device on the Takan machine. A reception signal acquisition means for extracting a distance inquiry reception signal corresponding to the distance inquiry radio wave received by the antenna, and the self-diagnosis reception signal or / and the distance inquiry reception signal extracted by the reception signal acquisition means in each direction When the interference wave is included, the self-diagnosis reception signal and the distance inquiry reception signal in the direction in which the interference wave exists are blocked, and the interference wave Receiving signal monitoring means for taking out the self-diagnostic receiving signal or / and the distance inquiry receiving signal in a different direction, and the self-diagnostic receiving signal or / and the distance without the interfering wave extracted by the receiving signal monitoring means. A reception signal synthesizing unit that synthesizes the inquiry reception signal and outputs a synthesis signal; and the reception signal synthesis unit that receives the synthesis signal output from the reception signal synthesis unit and / or the distance inquiry reception signal. Receiving means for outputting a reception output signal when the determination is made, and receiving the self-diagnosis reception signal and / or the distance inquiry after a predetermined delay time when the reception output signal is output from the reception means. A transmission means for outputting a response transmission signal to the signal, a distribution means for distributing the response transmission signal output from the transmission means in correspondence with the antenna, and the distribution means Modulating means for modulating the distributed response transmission signal into a Takan direction signal and outputting it via the antenna, and response transmission signal monitoring means for monitoring the response transmission signal output from the transmission means It is characterized by.

  According to a second aspect of the present invention, there is provided a received signal monitoring method used in a Takan ground device having an omnidirectional antenna. A self-diagnosis interrogation radio wave generating means repeatedly generates a self-diagnosis interrogation radio wave to generate the antenna A self-diagnosis interrogation radio wave generation process to be received by the receiver and a received signal acquisition means provided corresponding to each direction corresponding to the antenna is for self-diagnosis corresponding to the self-diagnosis interrogation radio wave received by the antenna A reception signal acquisition process for extracting a reception signal and a distance inquiry reception signal corresponding to a distance inquiry radio wave transmitted from the device on the Takan machine and received by the antenna, and a reception signal monitoring unit are provided by the reception signal acquisition unit. The taken received signal for self-diagnosis and / or the distance inquiry received signal is monitored for each direction, and when an interference wave is included, the interference wave exists. A reception signal monitoring process for taking out the self-diagnosis reception signal and / or the distance inquiry reception signal in the direction without the interference wave by cutting off the self-diagnosis reception signal and the distance inquiry reception signal of Receiving means for combining the received signal for self-diagnosis and / or the distance inquiry received signal without the interference signal extracted by the received signal monitoring means and outputting a synthesized signal; Receiving the combined signal output from the received signal combining means and determining that the received signal is the self-diagnosis received signal and / or the distance query received signal; When the reception output signal is output from the reception unit, the self-diagnosis reception signal and / or the distance inquiry reception signal is output after a predetermined delay time has elapsed. A transmission process for outputting an answer transmission signal; a distribution means for distributing the response transmission signal output from the transmission means in correspondence with the antenna; and a modulation means for distributing the response transmission signal by the distribution means. Modulation processing that modulates a response transmission signal into a Takan direction signal and outputs it via the antenna, and response transmission signal monitoring means performs response transmission signal monitoring processing that monitors the response transmission signal output from the transmission means It is characterized by that.

  According to the configuration of the present invention, even if an interfering wave is mixed, the interfering wave can be blocked, so that the operation stop can be avoided.

It is a block diagram which shows the electrical constitution of the Takan ground apparatus which is one Embodiment of this invention. It is a figure which shows the electrical structure of the interference wave monitoring part 16 in FIG. 1, the coaxial switch 17, and the combiner | synthesizer 18. FIG. It is a block diagram which shows the electrical structure of the Takan ground apparatus which concerns on related technology. It is a figure which shows the structure of the column array 5a arrange | positioned in the antenna 5 in FIG. It is a wave form diagram explaining operation | movement of the Takan ground apparatus of FIG. 3 when there is no CW interference wave. It is a wave form diagram explaining operation | movement of the Takan ground apparatus of FIG. 3 when there exists a CW interference wave.

  The reception signal monitoring means (interference wave monitoring unit, coaxial switch) is provided corresponding to each of the above directions, and the received signal for self-diagnosis and / or the distance inquiry when a given cutoff control signal is in an active mode. Blocking / passing means (a plurality of coaxial switches) for blocking the reception signal while allowing the reception signal for self-diagnosis and / or the distance inquiry reception signal to pass when the blocking control signal is in the non-active mode, and the reception signal The self-diagnosis reception signal or / and the distance inquiry reception signal extracted by the acquisition means (circulator) is monitored for each direction, and if an interference wave is included, it corresponds to the direction in which the interference wave exists. The blocking / passing means for the active mode is given to the blocking / passing means, while the blocking / passing means corresponding to the direction where the interference wave is not present Realizing TACAN ground device that is configured from an interference wave monitoring means for providing the cut-off control signal in the active mode (interference wave monitoring unit).

  The interference wave monitoring means (interference wave monitoring unit) is provided corresponding to each direction and receives the reception signal for self-diagnosis and / or the distance inquiry received by the reception signal acquisition means (circulator). Received signal detection means (detector) for detecting a signal for each azimuth, and a reference for determining whether the interference signal is included in the received signal for self-diagnosis or / and the received distance inquiry signal A reference level setting unit (level setting circuit) in which a level is set, and the received signal for self-diagnosis and / or the detected signal detected by the received signal detecting means (detector) provided corresponding to each direction. When the distance inquiry received signal level is compared with the above reference level, and when the above level is equal to or higher than the above level, the active mode cutoff control signal is output, but is smaller than the same reference level. It is constructed from a plurality of level comparison circuit outputting the cut-off control signal of the non-active mode (CW interference signal level comparator circuit).

  Further, the interference wave monitoring means (interference wave monitoring unit) is configured to receive the self-diagnosis reception signal or the signal based on the mode of each cutoff control signal output from each level comparison circuit (CW interference wave level comparison circuit). / And based on the analysis result by the reception signal analysis means (reception signal analysis section) for analyzing the presence / absence of the interference wave in the distance inquiry reception signal for each direction and the reception signal analysis means (reception signal analysis section). And display means (display unit) for displaying the presence / absence of the interference wave in each direction.

  Further, the interference wave monitoring means (interference wave monitoring unit) is configured to receive the self-diagnosis reception signal or the signal based on the mode of each cutoff control signal output from each level comparison circuit (CW interference wave level comparison circuit). / And based on the analysis result by the reception signal analysis means (reception signal analysis section) for analyzing the presence / absence of the interference wave in the distance inquiry reception signal for each direction and the reception signal analysis means (reception signal analysis section). And an informing means (informing unit) for informing an alarm (alarm) when the interference wave is present.

Embodiment

FIG. 1 is a block diagram showing an electrical configuration of a Takan ground apparatus according to an embodiment of the present invention.
As shown in the figure, the Takan ground apparatus of this form includes a transmitter 11, a distributor 12, a modulator 13, circulators 14, 14,..., An antenna 15, an interference wave monitoring unit 16, and the like. The display unit 16a, the notification unit 16b, the coaxial switch 17, the synthesizer 18, the receiver 19, and the monitor unit 20 are selected by the on-machine device 8 as in FIG. . Further, in the antenna 15, similarly to FIG. 4, a plurality of column arrays 15 a, 15 a,..., 15 a are arranged on the circumference, and the antenna 15 is configured to be non-directional. Further, this Takan ground device has a self-diagnosis interrogation radio wave generating means (not shown). The self-diagnosis interrogation radio wave generating means repeatedly generates a self-diagnosis interrogation radio wave qb for constantly monitoring the operating status of the Takan ground device at a predetermined time interval, and causes the column array 15a of the antenna 15 to receive it.

  The circulator 14 is provided corresponding to each direction corresponding to the column array 15 a of the antenna 15, and extracts a self-diagnosis reception signal corresponding to the self-diagnosis inquiry radio wave qb received by the antenna 15 as the reception signal rs. At the same time, a distance inquiry reception signal corresponding to the distance inquiry radio wave qa transmitted from the Takan onboard device 8 and received by the antenna 15 to inquire about the distance to the Takan ground device is extracted. The coaxial switch 17 is provided corresponding to each direction corresponding to the column array 15a of the antenna 15, and the received signal when the coaxial switch control signal a (cut-off control signal) given from the interference wave monitoring unit 16 is in the active mode. While rs (the reception signal for self-diagnosis or / and the distance inquiry reception signal) is cut off, the reception signal rs (the reception signal for self-diagnosis or / and the distance) when the coaxial switch control signal a (cut-off control signal) is in the non-active mode. Question reception signal).

  The interference wave monitoring unit 16 monitors the reception signal rs (self-diagnosis reception signal or / and distance inquiry reception signal) extracted by the circulator 14 for each direction corresponding to the antenna 15, and CW interference waves from the interference source are detected. If included, the coaxial switch control signal a in the active mode is given to the coaxial switch 17 corresponding to the direction in which the CW jamming wave exists, while the coaxial switch 17 corresponding to the direction in which the CW jamming wave does not exist is inactive. A mode coaxial switch control signal a is provided. The interference wave monitoring unit 16 constitutes interference wave monitoring means, and is constituted by a computer that functions based on the received signal monitoring program. The interference wave monitoring unit 16 and the coaxial switch 17 constitute reception signal monitoring means. When the reception signal rs is monitored for each direction and a CW interference wave is included, the CW interference wave is present. The reception signal rs in the azimuth is cut off, and the reception signal rs in the azimuth with no CW interference wave is taken out. The display unit 16a displays the presence / absence of a CW interference wave for each direction. The notification unit 16b notifies a warning (alarm sound or light) when a CW interference wave is present.

  The synthesizer 18 synthesizes the received signal rs in the direction without the CW interference wave extracted by the received signal monitoring means (interference wave monitoring unit 16, coaxial switch 17), and outputs a synthesized signal cs. When the receiver 19 receives and demodulates the composite signal cs output from the combiner 18 and determines that it is a self-diagnosis reception signal or / and a distance query reception signal, the receiver 19 outputs a receiver output signal rm (reception output). Signal). When a receiver output signal rm is output from the receiver 19, the transmitter 11 receives a reception signal for self-diagnosis or / and a distance query after a predetermined delay time (for example, the system delay time Td in FIG. 5) has elapsed. A response transmission pulse ps (response transmission signal) to the signal is output. The monitor unit 20 monitors response transmission pulses ps generated from the transmitter 11. The distributor 12 distributes the response transmission pulse ps output from the transmitter 11 so as to correspond to the column array 15 a of the antenna 15. The modulator 13 is composed of an amplitude modulator, modulates the response transmission pulse ps distributed by the distributor 12 into a takan azimuth signal, and outputs it through the circulator 14 and the column array 15a of the antenna 15.

FIG. 2 is a diagram illustrating an electrical configuration of the interference wave monitoring unit 16 in FIG. 1, the coaxial switch 17, and the combiner 18.
As shown in FIG. 2, the interference wave monitoring unit 16 includes detectors 31, 31,..., CW interference wave level comparison circuits 32, 32,..., A level setting circuit 33, and received signal analysis. Part 34. The detector 31 is provided corresponding to each azimuth corresponding to the column array 15a of the antenna 15, and the reception signal rs (the self-diagnosis reception signal or / and the distance inquiry reception signal) extracted by the circulator 14 is set to each of the above azimuths. Detect every time. In the level setting circuit 33, a reference level for determining whether or not a CW interference wave is included in the reception signal rs (the self-diagnosis reception signal or / and the distance inquiry reception signal) is set. The CW interference wave level comparison circuit 32 is provided corresponding to each direction corresponding to the column array 15a of the antenna 15, and the reception signal rs (the reception signal for self-diagnosis or / and the distance inquiry reception signal) detected by the detector 31. ) Is compared with the reference level, and when the reference level is equal to or higher than the reference level, the active mode coaxial switch control signal a (shut-off control signal) is output. When the level is lower than the reference level, the non-active mode coaxial switch is output. A control signal a is output.

  Based on the mode of the coaxial switch control signal a output from the CW interference wave level comparison circuit 32, the reception signal analyzer 34 receives the CW interference wave of the reception signal rs (the self-diagnosis reception signal or / and the distance inquiry reception signal). The presence or absence of is analyzed for each direction. The display unit 16a displays the presence / absence of the CW interference wave for each direction based on the analysis result by the reception signal analysis unit 34. Based on the analysis result by the received signal analysis unit 34, the notification unit 16b notifies an alarm (alarm) when a CW interference wave is present.

Next, processing contents of the received signal monitoring method used for this type of Takan ground apparatus will be described.
In this Takan ground device, the self-diagnosis interrogation radio wave qb is repeatedly generated by the self-diagnosis interrogation radio wave generation means and received by the column array 15a of the antenna 15 (self-diagnosis interrogation radio wave generation processing). The circulator 14 extracts a self-diagnosis reception signal corresponding to the self-diagnosis interrogation radio wave qb received by the antenna 15 as the reception signal rs, and is transmitted from the on-machine device 8 and received by the antenna 15. A distance inquiry reception signal corresponding to the distance inquiry radio wave qa is extracted (reception signal acquisition processing). The reception signal rs (the reception signal for self-diagnosis or / and the distance inquiry reception signal) extracted by the circulator 14 by the reception signal monitoring means (interference wave monitoring unit 16 and coaxial switch 17) is obtained for each direction corresponding to the antenna 15. When the CW interference wave is monitored and the reception signal rs in the direction in which the CW interference wave exists is cut off, the reception signal rs in the direction without the CW interference wave is extracted (reception signal monitoring process).

  In this reception signal monitoring process, the interference signal monitoring unit 16 monitors the reception signal rs extracted by the circulator 14 for each direction, and when a CW interference wave is included, the interference signal monitoring unit 16 has a direction in which the CW interference wave exists. An active mode coaxial switch control signal a (cut-off control signal) is given to the corresponding coaxial switch 17, while a non-active mode coaxial switch control signal a is given to the coaxial switch 17 corresponding to a direction in which no CW interference wave exists. (Jamming wave monitoring process) In this interference wave monitoring process, the detector 31 detects the reception signal rs extracted by the circulator 14 for each direction (reception signal detection process). The level of the reception signal rs detected by the detector 31 is compared with the reference level of the level setting circuit 33 by the CW interference wave level comparison circuit 32, and the active mode coaxial switch control signal a is output when the level is equal to or higher than the reference level. On the other hand, when it is smaller than the reference level, the non-active mode coaxial switch control signal a is output (level comparison processing).

  The received signal rs is blocked by the coaxial switch 17 when the supplied coaxial switch control signal a is in the active mode, while the received signal rs is passed when the coaxial switch control signal a is in the non-active mode (block / pass). processing). In the interference wave monitoring process, the reception signal analyzer 34 determines whether or not there is a CW interference wave in the reception signal rs based on the mode of each coaxial switch control signal a output from the CW interference wave level comparison circuit 32. Analysis is performed for each azimuth (reception signal analysis processing), and the presence or absence of the CW interference wave is displayed for each azimuth by the display unit 16a based on the analysis result by the reception signal analysis unit 34 (display processing). In addition, based on the analysis result by the reception signal analysis unit 34, the notification unit 16b notifies an alarm (alarm) when there is a CW jamming wave (notification process).

  The synthesizer 18 synthesizes the reception signal rs without the CW interference wave extracted by the reception signal monitoring means (interference wave monitoring unit 16, coaxial switch 17) and outputs the synthesized signal cs (reception signal synthesis process). . When the receiver 19 receives and demodulates the synthesized signal cs output from the synthesizer 18 and determines that it is a received signal rs (a self-diagnosis received signal or / and a distance inquiry received signal), the receiver 19 An output signal rm is output (reception processing). When a transmitter output signal rm is output from the receiver 19 by the transmitter 11, a response transmission pulse ps (response transmission signal) for the reception signal rs is output after a predetermined delay time (system delay time Td) has elapsed. (Transmission process). The monitor unit 20 monitors the response transmission pulse ps output from the transmitter 11 (response transmission signal monitoring process). The distributor 12 distributes the response transmission pulse ps output from the transmitter 11 so as to correspond to the column array 15a of the antenna 15 (distribution process). The response transmission pulse ps distributed by the distributor 12 is modulated by the modulator 13 into the takan azimuth signal tf and output as the response radio wave dp via the circulator 14 and the antenna 15 (modulation processing).

  As described above, in this embodiment, when the reception signal rs from the column array 15a of the antenna 15 is extracted by the circulator 14, the level is monitored by the interference wave monitoring unit 16, and it is determined that the CW interference wave has arrived. Since only the received signal rs in that direction is cut off by the coaxial switch 17 and is not input to the receiver 19, the Takan direction signal tf is output corresponding to all directions including the direction affected by the CW interference wave. The response transmission pulse ps is normally output, the monitoring result by the monitor unit 20 is determined to be normal, and the operation stop is avoided. Moreover, since the presence or absence of the CW interference wave is displayed for each direction based on the analysis result by the reception signal analysis unit 34, the display unit 16a can recognize the presence or absence of the CW interference wave smoothly to the user. Further, when there is a CW jamming wave, a warning is given by the reporting unit 16b based on the analysis result by the received signal analyzing unit 34, so that the user can smoothly recognize the presence or absence of the CW jamming wave.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiment, and even if there is a design change without departing from the gist of the present invention, Included in the invention.

  A part or all of the above embodiment can be described as in the following supplementary notes, but is not limited to the following.

(Appendix 1)
An omnidirectional antenna,
A self-diagnosis interrogation radio wave generating means for repeatedly generating a self-diagnosis interrogation radio wave and receiving it on the antenna;
A self-diagnostic reception signal corresponding to the self-diagnosis interrogation radio wave received by the antenna is provided corresponding to each azimuth corresponding to the antenna, and transmitted from the on-machine device and received by the antenna. Received signal acquisition means for extracting a distance inquiry received signal corresponding to the distance inquiry radio wave,
The self-diagnosis reception signal or / and the distance inquiry reception signal extracted by the reception signal acquisition unit is monitored for each direction, and when an interference wave is included, the self in the direction in which the interference wave exists is included. Reception signal monitoring means for cutting off the diagnostic reception signal and the distance inquiry reception signal and extracting the self-diagnosis reception signal or / and the distance inquiry reception signal in the direction without the interference wave;
Received signal combining means for combining the received signal for self-diagnosis without the interference wave and / or the distance inquiry received signal extracted by the received signal monitoring means and outputting a combined signal;
Receiving means for receiving the synthesized signal output from the received signal synthesizing means and outputting the received output signal when it is determined that the received signal for self-diagnosis or / and the distance inquiry received signal;
A transmission means for outputting a self-diagnosis reception signal or / and a response transmission signal for the distance inquiry reception signal after a predetermined delay time has elapsed when the reception output signal is output from the reception means;
Distribution means for distributing the response transmission signal output from the transmission means in correspondence with the antenna;
Modulation means for modulating the response transmission signal distributed by the distribution means into a takan azimuth signal and outputting it via the antenna;
A Takan ground apparatus comprising response transmission signal monitoring means for monitoring the response transmission signal output from the transmission means.

(Appendix 2)
The received signal monitoring means includes
The self-diagnosis reception signal and / or the distance inquiry reception signal is cut off when the given cut-off control signal is provided in the active mode and the cut-off control signal is in the non-active mode. A blocking / passing means that sometimes passes the received signal for self-diagnosis or / and the distance inquiry received signal;
The self-diagnosis reception signal or / and the distance inquiry reception signal taken out by the reception signal acquisition means is monitored for each direction, and when an interference wave is included, it corresponds to the direction in which the interference wave exists. An interference mode monitoring means for supplying the cutoff control signal in the active mode to the cutoff / passing means corresponding to a direction where the interference wave does not exist, while supplying the cutoff control signal in the active mode to the cutoff / passing means. The Takan ground apparatus according to Supplementary Note 1, which is configured.

(Appendix 3)
The interference wave monitoring means includes:
A reception signal detection means provided corresponding to each of the azimuths, for detecting the reception signal for self-diagnosis or / and the distance inquiry reception signal for each of the azimuths;
A reference level setting unit in which a reference level for determining whether the interference signal is included in the reception signal for self-diagnosis or / and the distance inquiry reception signal;
When the level of the reception signal for self-diagnosis or / and the distance inquiry reception signal provided corresponding to each direction and detected by the reception signal detection means is compared with the reference level and is equal to or higher than the reference level And a plurality of level comparison circuits for outputting the non-active mode cutoff control signal when the active mode cutoff control signal is lower than the reference level. .

(Appendix 4)
The interference wave monitoring means includes:
Based on the mode of each cutoff control signal output from each level comparison circuit, the received signal for analyzing the presence / absence of the interference wave of the reception signal for self-diagnosis and / or the distance inquiry reception signal for each direction Analysis means;
The Takan ground apparatus according to appendix 3, further comprising display means for displaying the presence / absence of the interference wave in each of the directions based on the analysis result by the received signal analysis means.

(Appendix 5)
The interference wave monitoring means includes:
Based on the mode of each cutoff control signal output from each level comparison circuit, the received signal for analyzing the presence / absence of the interference wave of the reception signal for self-diagnosis and / or the distance inquiry reception signal for each direction Analysis means;
The Takan ground apparatus according to supplementary note 3, further comprising: a notification unit configured to notify a warning when the interference wave is present based on an analysis result by the reception signal analysis unit.

(Appendix 6)
A received signal monitoring method used for a Takan ground device having an omnidirectional antenna,
A self-diagnosis interrogation radio wave generating means for repeatedly generating a self-diagnosis interrogation radio wave and receiving it on the antenna;
Received signal acquisition means provided corresponding to each azimuth corresponding to the antenna extracts a self-diagnosis received signal corresponding to the self-diagnosis interrogation radio wave received by the antenna and transmits it from the on-machine device. A reception signal acquisition process for extracting a distance inquiry reception signal corresponding to the distance inquiry radio wave received by the antenna;
The reception signal monitoring means monitors the reception signal for self-diagnosis or / and the distance inquiry reception signal taken out by the reception signal acquisition means for each direction. A reception signal monitoring process for extracting the self-diagnosis reception signal and / or the distance inquiry reception signal in the direction without the interference wave by blocking the self-diagnosis reception signal and the distance inquiry reception signal in an existing direction;
Received signal combining means for combining the received signal for self-diagnosis or / and the distance inquiry received signal without the interference wave extracted by the received signal monitoring means to output a combined signal;
A reception process for outputting a reception output signal when the reception unit receives the combined signal output from the reception signal combining unit and determines that the received signal is the self-diagnosis reception signal and / or the distance inquiry reception signal. When,
When the transmission means outputs the reception output signal from the reception means, a transmission process for outputting the self-diagnosis reception signal or / and the response transmission signal for the distance inquiry reception signal after a lapse of a predetermined delay time;
A distribution process in which a distribution unit distributes the response transmission signal output from the transmission unit in association with the antenna;
A modulation unit that modulates the response transmission signal distributed by the distribution unit into a Takan direction signal and outputs the signal via the antenna;
A received signal monitoring method in which a response transmission signal monitoring unit performs a response transmission signal monitoring process for monitoring the response transmission signal output from the transmission unit.

(Appendix 7)
The reception signal monitoring means is composed of interference wave monitoring means and blocking / passing means,
In the received signal monitoring process,
The interference wave monitoring means monitors the reception signal for self-diagnosis or / and the distance inquiry reception signal taken out by the reception signal acquisition means for each direction, and when the interference wave is included, The cutoff control signal in the active mode is given to the cutoff / passing means corresponding to the direction where the wave exists, while the cutoff control signal in the non-active mode is given to the cutoff / passing means corresponding to the direction where the interference wave does not exist The disturbing wave monitoring process
The blocking / passing means provided corresponding to each direction blocks the reception signal for self-diagnosis and / or the distance inquiry reception signal when a given blocking control signal is in an active mode, while blocking the blocking The received signal monitoring method according to appendix 6, wherein a blocking / passing process for passing the received signal for self-diagnosis and / or the received distance inquiry signal when the control signal is in an inactive mode.

(Appendix 8)
The interference wave monitoring means is provided with a reference level setting unit in which a reference level for determining whether or not the interference signal is included in the reception signal for self-diagnosis and / or the distance inquiry reception signal is provided. And
In the interference wave monitoring process,
The reception signal detection means provided corresponding to each direction detects the reception signal for self-diagnosis or / and the distance inquiry reception signal for each direction, and
A plurality of level comparison circuits provided corresponding to the respective directions compare the level of the reception signal for self-diagnosis or / and the distance inquiry reception signal detected by the reception signal detection means with the reference level. The received signal according to appendix 7, wherein level comparison processing is performed in which the cutoff control signal in the active mode is output when the level is equal to or higher than the reference level, and the cutoff control signal in the non-active mode is output when the level is lower than the reference level. Monitoring method.

(Appendix 9)
In the interference wave monitoring process,
Based on the mode of each shut-off control signal output from each level comparison circuit, the received signal analyzing means determines the presence / absence of the interfering wave in the self-diagnosis received signal and / or the distance query received signal in each direction. Received signal analysis processing to analyze every time,
The received signal monitoring method according to appendix 8, wherein the display means performs display processing for displaying the presence / absence of the interfering wave for each of the directions based on the analysis result by the received signal analyzing means.

(Appendix 10)
In the interference wave monitoring process,
Based on the mode of each shut-off control signal output from each level comparison circuit, the received signal analyzing means determines the presence / absence of the interfering wave in the self-diagnosis received signal and / or the distance query received signal in each direction. Received signal analysis processing to analyze every time,
The received signal monitoring method according to supplementary note 8, wherein the notifying means performs a notifying process for notifying an alarm when the interference wave is present based on an analysis result by the received signal analyzing means.

(Appendix 11)
A received signal monitoring program for causing a computer to function as the interference wave monitoring means according to any one of appendices 2 to 5.

  The present invention can be applied to all Takan ground devices, and is particularly effective when there is an interference wave when a distance interrogation radio wave is received from the Takan onboard device.

11 Transmitter (Transmission means)
12 Distributor (Distributing means)
13 Modulator (Modulation means)
14, 14, ..., 14 Circulator (Receiving signal acquisition means)
15 Antenna 15a, 15a, ..., 15a Column array (part of antenna)
16 Interference wave monitoring unit (part of received signal monitoring means, interference wave monitoring means)
16a Display section (part of received signal monitoring means, part of interference wave monitoring means, display means)
16b Notification unit (part of received signal monitoring means, part of interference wave monitoring means, notification means)
17, 17,... 17 Coaxial switch (part of received signal monitoring means, blocking / passing means)
18 Synthesizer (Receiving signal synthesis means)
19 Receiver (Receiving means)
20 Monitor section (response transmission signal monitoring means)
31, 31, ..., 31 detector (reception signal detection means)
32, 32, ..., 32 CW interference wave level comparison circuit (level comparison circuit)
33 Level setting circuit (reference level setting section)
34 Received signal analyzer (received signal analyzer)

Claims (10)

An omnidirectional antenna,
A self-diagnosis interrogation radio wave generating means for repeatedly generating a self-diagnosis interrogation radio wave and receiving it on the antenna;
A self-diagnostic reception signal corresponding to the self-diagnosis interrogation radio wave received by the antenna is provided corresponding to each azimuth corresponding to the antenna, and transmitted from the on-machine device and received by the antenna. Received signal acquisition means for extracting a distance inquiry received signal corresponding to the distance inquiry radio wave,
The self-diagnosis reception signal or / and the distance inquiry reception signal extracted by the reception signal acquisition unit is monitored for each direction, and when an interference wave is included, the self in the direction in which the interference wave exists is included. Reception signal monitoring means for cutting off the diagnostic reception signal and the distance inquiry reception signal and extracting the self-diagnosis reception signal or / and the distance inquiry reception signal in the direction without the interference wave;
Received signal combining means for combining the received signal for self-diagnosis without the interference wave and / or the distance inquiry received signal extracted by the received signal monitoring means and outputting a combined signal;
Receiving means for receiving the synthesized signal output from the received signal synthesizing means and outputting the received output signal when it is determined that the received signal for self-diagnosis or / and the distance inquiry received signal;
A transmission means for outputting a self-diagnosis reception signal or / and a response transmission signal for the distance inquiry reception signal after a predetermined delay time has elapsed when the reception output signal is output from the reception means;
Distribution means for distributing the response transmission signal output from the transmission means in correspondence with the antenna;
Modulation means for modulating the response transmission signal distributed by the distribution means into a takan azimuth signal and outputting it via the antenna;
A Takan ground apparatus comprising: a response transmission signal monitoring unit that monitors the response transmission signal output from the transmission unit. The received signal monitoring means includes
The self-diagnosis reception signal and / or the distance inquiry reception signal is cut off when the given cut-off control signal is provided in the active mode and the cut-off control signal is in the non-active mode. A blocking / passing means that sometimes passes the received signal for self-diagnosis or / and the distance inquiry received signal;
The self-diagnosis reception signal or / and the distance inquiry reception signal taken out by the reception signal acquisition means is monitored for each direction, and when an interference wave is included, it corresponds to the direction in which the interference wave exists. An interference mode monitoring means for supplying the cutoff control signal in the active mode to the cutoff / passing means corresponding to a direction where the interference wave does not exist, while supplying the cutoff control signal in the active mode to the cutoff / passing means. The Takan ground apparatus according to claim 1, which is configured. The interference wave monitoring means includes:
A reception signal detection means provided corresponding to each of the azimuths, for detecting the reception signal for self-diagnosis or / and the distance inquiry reception signal for each of the azimuths;
A reference level setting unit in which a reference level for determining whether the interference signal is included in the reception signal for self-diagnosis or / and the distance inquiry reception signal;
When the level of the reception signal for self-diagnosis or / and the distance inquiry reception signal provided corresponding to each direction and detected by the reception signal detection means is compared with the reference level and is equal to or higher than the reference level A plurality of level comparison circuits that output the cutoff control signal in the active mode while outputting the cutoff control signal in the non-active mode when the cutoff level is lower than the reference level. The Takan ground apparatus according to 2. The interference wave monitoring means includes:
Based on the mode of each cutoff control signal output from each level comparison circuit, the received signal for analyzing the presence / absence of the interference wave of the reception signal for self-diagnosis and / or the distance inquiry reception signal for each direction Analysis means;
4. The Takan ground apparatus according to claim 3, further comprising display means for displaying the presence / absence of the interfering wave for each of the directions based on an analysis result by the received signal analyzing means. The interference wave monitoring means includes:
Based on the mode of each cutoff control signal output from each level comparison circuit, the received signal for analyzing the presence / absence of the interference wave of the reception signal for self-diagnosis and / or the distance inquiry reception signal for each direction Analysis means;
4. The Takan ground apparatus according to claim 3, further comprising a notifying unit for notifying an alarm when the jamming wave is present based on an analysis result by the received signal analyzing unit. A received signal monitoring method used for a Takan ground device having an omnidirectional antenna,
A self-diagnosis interrogation radio wave generating means for repeatedly generating a self-diagnosis interrogation radio wave and receiving it on the antenna;
Received signal acquisition means provided corresponding to each azimuth corresponding to the antenna extracts a self-diagnosis received signal corresponding to the self-diagnosis interrogation radio wave received by the antenna and transmits it from the on-machine device. A reception signal acquisition process for extracting a distance inquiry reception signal corresponding to the distance inquiry radio wave received by the antenna;
The reception signal monitoring means monitors the reception signal for self-diagnosis or / and the distance inquiry reception signal taken out by the reception signal acquisition means for each direction. A reception signal monitoring process for extracting the self-diagnosis reception signal and / or the distance inquiry reception signal in the direction without the interference wave by blocking the self-diagnosis reception signal and the distance inquiry reception signal in an existing direction;
Received signal combining means for combining the received signal for self-diagnosis or / and the distance inquiry received signal without the interference wave extracted by the received signal monitoring means to output a combined signal;
A reception process for outputting a reception output signal when the reception unit receives the combined signal output from the reception signal combining unit and determines that the received signal is the self-diagnosis reception signal and / or the distance inquiry reception signal. When,
When the transmission means outputs the reception output signal from the reception means, a transmission process for outputting the self-diagnosis reception signal or / and the response transmission signal for the distance inquiry reception signal after a lapse of a predetermined delay time;
A distribution process in which a distribution unit distributes the response transmission signal output from the transmission unit in association with the antenna;
A modulation unit that modulates the response transmission signal distributed by the distribution unit into a Takan direction signal and outputs the signal via the antenna;
A reception signal monitoring method, wherein the response transmission signal monitoring means performs a response transmission signal monitoring process for monitoring the response transmission signal output from the transmission means. The reception signal monitoring means is composed of interference wave monitoring means and blocking / passing means,
In the received signal monitoring process,
The interference wave monitoring means monitors the reception signal for self-diagnosis or / and the distance inquiry reception signal taken out by the reception signal acquisition means for each direction, and when the interference wave is included, The cutoff control signal in the active mode is given to the cutoff / passing means corresponding to the direction where the wave exists, while the cutoff control signal in the non-active mode is given to the cutoff / passing means corresponding to the direction where the interference wave does not exist The disturbing wave monitoring process
The blocking / passing means provided corresponding to each direction blocks the reception signal for self-diagnosis and / or the distance inquiry reception signal when a given blocking control signal is in an active mode, while blocking the blocking 7. The received signal monitoring method according to claim 6, wherein when the control signal is in a non-active mode, a blocking / passing process for passing the reception signal for self-diagnosis and / or the distance inquiry reception signal is performed. The interference wave monitoring means is provided with a reference level setting unit in which a reference level for determining whether or not the interference signal is included in the reception signal for self-diagnosis and / or the distance inquiry reception signal is provided. And
In the interference wave monitoring process,
The reception signal detection means provided corresponding to each direction detects the reception signal for self-diagnosis or / and the distance inquiry reception signal for each direction, and
A plurality of level comparison circuits provided corresponding to the respective directions compare the level of the reception signal for self-diagnosis or / and the distance inquiry reception signal detected by the reception signal detection means with the reference level. A level comparison process is performed in which the cutoff control signal in the active mode is output when the reference level is equal to or higher than the reference level, and the cutoff control signal in the non-active mode is output when the level is lower than the reference level. Item 8. A received signal monitoring method according to Item 7. In the interference wave monitoring process,
Based on the mode of each shut-off control signal output from each level comparison circuit, the received signal analyzing means determines the presence / absence of the interfering wave in the self-diagnosis received signal and / or the distance query received signal in each direction. Received signal analysis processing to analyze every time,
9. The received signal monitoring method according to claim 8, wherein the display means performs display processing for displaying the presence / absence of the interfering wave for each of the directions based on the analysis result by the received signal analyzing means. In the interference wave monitoring process,
Based on the mode of each shut-off control signal output from each level comparison circuit, the received signal analyzing means determines the presence / absence of the interfering wave in the self-diagnosis received signal and / or the distance query received signal in each direction. Received signal analysis processing to analyze every time,
9. The received signal monitoring method according to claim 8, wherein the notifying means performs notification processing for notifying an alarm when the interference wave is present based on an analysis result by the received signal analyzing means.

Images