JP3455480B2 - Self-diagnosis system for radio wave transceiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio transmission / reception apparatus, such as a radar apparatus, which emits and receives radio waves and analyzes received radio waves to obtain necessary data. The present invention relates to improvement of a system for self-diagnosis (Built-In-Test, hereinafter referred to as BIT). 2. Description of the Related Art A radar apparatus for receiving necessary data by receiving a reflected radio wave and returning to a target, and for receiving a radio wave emitted from such a radar apparatus. There is a device provided with a radio wave transmission / reception function, such as an electronic warfare support device that analyzes the position of an object or emits a jamming radio wave. These are collectively referred to as a radio wave transmitting / receiving device in the present invention. Such a radio transmission / reception device does not always receive some radio waves, such as when there is no target, so it may not be clear whether the device is operating normally. Therefore, a self-diagnosis system is conventionally provided in such a radio wave transmitting / receiving apparatus. FIG. 7 shows an example of a conventional radio transmission / reception apparatus similar to that disclosed in Japanese Patent Application Laid-Open No. 6-222133 and a self-diagnosis system, and FIG. 8 is an explanatory diagram of the operation of FIG. . In the figure, 1 is a receiving antenna for receiving a target signal, 2 is a receiving circuit connected to the receiving antenna 1, 3 is an analysis processing circuit for analyzing signal characteristics of a signal received by the receiving circuit 2, 4 is an analysis circuit A replacement oscillation circuit that oscillates a signal corresponding to the signal specifications analyzed and controlled by the processing circuit 3, 5 is a transmission circuit that amplifies the output of the replacement oscillation circuit 4, and 6 is a transmission circuit that radiates a transmission signal of the transmission circuit 5. An antenna 7 is a BIT of the receiving circuit 2 and the transmitting circuit 5
BIT oscillator 15 used when performing
BIT monitor circuit that monitors the output of the BIT. Reference numeral 30 denotes a result output. Next, the operation of FIG. 7 will be described.
Since the basic operation of this type of radar and the like is well known, detailed description will be omitted. However, as shown in FIG. 8, a transmission radio wave is transmitted in a pulse shape at a predetermined interval, and a reception circuit is transmitted while the transmission radio wave is being emitted. 2 stops the operation, and the receiving circuit operates at the time when the transmission radio wave is interrupted to perform reception. Therefore, basically, the fact that the radio wave emitted from the transmitting antenna 6 is directly received by the receiving antenna 1 does not occur. When performing self-diagnosis, the BIT oscillator 7
The signal for reception is received by the receiving circuit 2 by cable connection, the signal for BIT is analyzed by the analysis processing circuit 3, and it is collated with the radio characteristics such as the predetermined BIT signal modulation characteristics, and received by the radio transmission / reception device. B of the system from circuit 2 to analysis processing circuit 3
While performing IT, the signal oscillated by the replacement oscillation circuit 4 is amplified by the transmission circuit 5 based on the predetermined specifications corresponding to these specifications, and transmitted by monitoring the transmission wave by the BIT monitor circuit. BIT of the system had been implemented. Although FIG. 7 shows only one receiving circuit 2 and one transmitting circuit 5, a plurality of receiving circuits 2 and analysis processing circuits 3 are provided to simultaneously analyze a large number of radar devices having different frequencies. In some cases. In a radio wave transmitting / receiving apparatus having a plurality of reception analysis functions,
Either change the modulation characteristics of the IT signal, or
It has an IT oscillator and implements BIT respectively. [0006] The conventional self-diagnosis system of the radio wave transmission / reception device is configured as described above. 1. The failure diagnosis of the reception antenna and the transmission antenna cannot be performed. 2. Detailed transmission characteristics (such as transmission frequency accuracy in actual operation other than self-diagnosis) of the replacement oscillation circuit and the transmission circuit cannot be sufficiently confirmed. 3. The analysis accuracy (meaning the same as above) of the reception analysis circuit cannot be confirmed. 4. Although self-diagnosis is possible, it is difficult to compare reception characteristics between devices of the same type. There were problems such as. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and forms a closed loop in the entire radio wave transmitting / receiving apparatus including a receiving antenna and a transmitting antenna to perform self-diagnosis and failure of the entire system. Diagnosis can be made, the transmission frequency accuracy etc. in the actual operation of the replacement oscillation circuit, the transmission circuit and the reception analysis circuit can be sufficiently confirmed, and the reception characteristics of the radio transmission / reception device can be compared between devices of the same type. The purpose is to obtain a self-diagnosis system. A self-diagnosis system for a radio wave transmitting and receiving apparatus according to the present invention includes a replacement oscillation circuit for oscillating a signal of a predetermined radio wave specification, and amplifying an oscillation signal of the replacement oscillation circuit. transmission circuit for sending it, one of the transmission unit that includes the connected transmitting antenna to the transmitting circuit, a receiving antenna for receiving a signal transmitted from the transmitting antenna, a receiving circuit connected to the receiving antenna, this the reception unit including the analysis processing circuit for outputting a radio wave specifications connected to the receiving circuit by analyzing the received radio waves, each at the same time
Receive the same signal, the receiving frequencies are mutually
A receiving device group including the same plurality of receiving units , each of output data of a plurality of analysis processing circuits included in the receiving device group is compared with a modulation characteristic of an oscillation output of the replacement oscillation circuit, and the plurality of A matching circuit for self-diagnosing the soundness of the receiving unit and the one transmitting unit; and an integrated processing device for comparing the outputs of the plurality of analysis processing circuits with each other to diagnose the soundness of the group of receiving devices. is there. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 shows a block diagram of a radio wave transmitting / receiving apparatus and a self-diagnosis system thereof according to a first embodiment of the present invention, and FIG. 2 is a timing chart for explaining the operation. In the following drawings, the same reference numerals as those in the related art denote the same or corresponding parts, and a detailed description thereof will be omitted. In the figure, 1 is a receiving antenna for receiving a target signal, 2 is a receiving circuit connected to the receiving antenna 1, 3 is an analysis processing circuit for analyzing signal characteristics of a signal received by the receiving circuit 2, 4 is an analysis circuit A replacement oscillation circuit that oscillates a signal corresponding to the signal specifications analyzed and controlled by the processing circuit 3, 5 is a transmission circuit that amplifies the output of the replacement oscillation circuit 4, and 6 is a transmission circuit that radiates a transmission signal of the transmission circuit 5. An antenna 14 is an output of the analysis processing circuit 3 and a replacement oscillation circuit 4.
A comparison circuit for comparing and comparing the output with the output signal of the second processing unit, and confirming that there is no abnormality between the two signals, outputting the result to 30 and transmitting the frequency of the radio wave analyzed by the analysis processing circuit 3 to the replacement oscillation circuit 4. It is. The receiving antenna 1, the receiving circuit 2, and the analysis processing circuit 3 constitute a receiving unit 21. The replacement oscillation circuit 4, the transmission circuit 5, and the transmission antenna 6
Is composed. Reference numeral 99 denotes an explanation auxiliary line which is filled in for explanation, and indicates a wraparound signal in which a part of the transmission radio wave of the transmission antenna 6 is received by the reception antenna 1. That is, when performing the BIT, as shown in FIG. 2, the receiving circuit 2 is set during the time when the transmission radio wave is emitted (part or all of the time).
Performs reception. Next, FIGS. 1 and 2 will be described. The basic operation is the same as that of the conventional example shown in FIG. In FIG. 1, when the BIT is activated, that is, when the self-diagnosis is performed, as shown in FIG. 2, the transmission function and the reception function of the radio wave transmitting / receiving device are activated simultaneously (even if there is a period during which the operation is performed simultaneously). For example, the start and stop timings may be shifted), the replacement oscillation circuit 4 oscillates a signal of a predetermined radio wave specification, and radiates a radio wave to the outside via the transmission circuit 5 and the transmission antenna 6. A part of this radio wave is configured to be received by the receiving antenna 1. That is, a transmission signal (BIT signal) for BIT is routed to the receiving antenna 1 by spatial coupling, and reception is performed at the same time as transmission is performed, thereby performing BIT. The BIT signal wrapped around using the spatial coupling is received and amplified by the receiving circuit 2, analyzed by the analysis processing circuit 3, and then subjected to the collation circuit 14 to modulate the BIT signal (the time width of the pulsed signal). , Time intervals, etc.). Further, the data regarding the frequency among the data analyzed by the analysis processing circuit 3 is passed to the oscillation frequency of the replacement oscillation circuit 4. In FIG. 1, since all the devices related to transmission and reception are used for self-diagnosis, BIT of the entire device can be performed. BI
When T is not performed or when BIT is completed, the reception timing is modified so as to be activated after transmission is completed as shown in FIG. Embodiment 2 In the self-diagnosis system of FIG. 1, when it is determined that there is an abnormality, it is not known which part of the apparatus has the abnormality. FIG. 3 shows a self-diagnosis system for solving this problem. As shown in FIG. 3, the faulty part detection circuit 16 connected to the input stage and the output stage of each circuit
Is provided, it is possible to specify and isolate a failure location at the time of failure occurrence. The failure part detection circuit 16 checks the input side signal and the output side signal of each circuit according to the function of each circuit. For example, if the transmission circuit 5 is a mere amplification circuit, collation is performed assuming that there is no change in specifications other than the amplitude. If the transmission circuit 5 includes a frequency conversion function, it is checked whether the frequency is converted based on a certain rule. . Embodiment 3 In FIG. 1 of Embodiment 1,
The BIT was carried out for the radio wave transmitting / receiving device mounted / equipped on the same mother body by the wraparound of the radio wave from the transmitting antenna 6 to the receiving antenna 1. However, as shown in FIG. 4, it is necessary to receive the reflected wave from the sea surface or the ground surface. The same effect can be obtained even if the BIT is performed. In this case, if the transmission power is reduced, the received signal is weakened, and the probability of detecting an abnormality is improved. Embodiment 4 For so-called electronic warfare support measures (Electronic Support Measures; ESM) and electronic countermeasures (Electronic Counter Measures; ECM), a radio wave transmitting / receiving apparatus having a plurality of transmitting / receiving circuits individually is used. FIG. 5 shows an example in which the self-diagnosis system of the present invention is applied to the above integrated radio wave transmitting and receiving apparatus. In the figure, reference numeral 9 denotes an ECM unit, which is basically the same as that of FIG. 10 is E
The SM part is shown, 1b is a receiving antenna for ESM, 2b is E
The SM receiving circuit 3b is an ESM analysis processing circuit.
The operation of the ESM unit 10 is the same as the operation of the circuit from the receiving antenna 1 to the analysis processing circuit 3 in FIG. Reference numeral 8 denotes an integrated processing device, which compares the analysis data of the analysis processing circuit 3 of the ECM unit 9 with the analysis data of the ESM analysis processing circuit 3b of the ESM unit 10 to check for an abnormality. In FIG. 5, when a BIT is activated, a BIT signal (transmitted signal) is simultaneously wrapped around the ESM antenna 1b and the ECM receiving antenna 1 by spatial coupling.
The analysis data of the analysis processing circuit 3 of the M unit 9 and the analysis data of the ESM analysis processing circuit 3b of the ESM unit 10 are collated by the integrated processing device 8. Since the reception characteristics of the ECM unit 9 and the ESM unit 10 are not always the same, if there is a difference between the two, the presence or absence of an abnormality is checked so as to allow a difference in the analysis data according to the difference. Can be The ECM unit 9 performs comparison of each modulation specification for the same BIT signal.
And the reception analysis performance of each of the ESM units 10 can be corrected. The receiving unit 21 of the ECM unit 9 and the receiving unit of the ESM unit constitute a receiving device group 23 according to the present invention. Although one ECM unit 9 and one ESM unit 10 are shown in the figure, more receiving units may be provided. In this case, the replacement oscillation circuit 4 oscillates a signal based on a signal from any one of the analysis processing circuits 3. Embodiment 5 In many cases, a plurality of radio transmission / reception devices having the same or similar performance specifications are mounted on a base (a parent machine or a mother ship) on which the radio transmission / reception device is mounted. If self-diagnosis of these radio wave transmitting / receiving devices can be performed simultaneously and collectively, instead of performing self-diagnosis, the self-diagnosis of the entire mother can be quickly performed. As shown in FIG. 6, the BIT of the entire radio equipment mounted / equipped on the same base can be simultaneously performed by circulating the radio wave to other radio equipment. In this case, it is assumed that the integrated processing device 8 can collect analysis data of all the systems to be inspected. Although FIG. 6 shows that the number of the integrated processing device 8 is one, the configuration may be such that there are a plurality of integrated processing devices 8 and the collation data are referred to each other. [0020] As described above, according to the present invention, according to the self-diagnosis system according to the present invention, since a plurality of receiving apparatus can check by a single transmission device, both when it is possible to simplify the configuration of the entire system , Multiple receivers at once
Self-diagnosis can be performed, and self-diagnosis of the whole mother can be performed quickly.
It can be done well. Further, since the BIT of the similar radio wave transmitting / receiving device mounted on the base can be performed at the same time, the effect that the system of the whole base can be simplified can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a self-diagnosis system of a radio wave transmitting / receiving device according to a first embodiment of the present invention. FIG. 2 is a timing chart illustrating the operation of FIG. FIG. 3 is a block diagram of a self-diagnosis system of a radio wave transmitting / receiving device according to a second embodiment of the present invention. FIG. 4 is an operation explanatory diagram of a self-diagnosis system of a radio wave transmitting / receiving device according to a third embodiment of the present invention. FIG. 5 is a block diagram of a self-diagnosis system of a radio wave transmitting / receiving device according to a fourth embodiment of the present invention. FIG. 6 is a block diagram of a self-diagnosis system of a radio wave transmitting / receiving device according to a fifth embodiment of the present invention. FIG. 7 is a block diagram of a conventional self-diagnosis system of a radio wave transmitting / receiving device. 8 is a timing chart for explaining the operation of the self-diagnosis system of the radio wave transmitting / receiving device of FIG. 7; [Description of Signs] 1 receiving antenna, 2 receiving circuit,
3 analysis processing circuit, 4 replacement oscillation circuit, 5 transmission circuit, 6 transmission antenna, 1b ESM antenna, 2b ESM reception circuit, 3b ES
M analysis processing circuit, 7 BIT oscillation circuit, 8 integrated processing device, 9 ECM unit, 10 ESM unit,
11 Other radio equipment, 14 Matching circuit,
15 BIT monitor circuit, 16 Failure part detection circuit, 21 receiver, 22 transmitter, 2
3 Receiver group.

Continuation of the front page (56) References JP-A-59-147284 (JP, A) JP-A-11-237465 (JP, A) JP-A-53-96797 (JP, A) JP-A-6-222133 (JP, A) JP-A-10-197578 (JP, A) JP-A-9-270772 (JP, A) Patent 2615901 (JP, B2) Patent 2900642 (JP, B2) (58) Fields investigated (Int. Cl. G01S ⁷ /00-7/40 G01S 13/00-13/95

Claims (1)

(57) [Claims] [Claim 1] A replacement oscillation circuit that oscillates a signal of a predetermined radio wave specification, a transmission circuit that amplifies and transmits an oscillation signal of the replacement oscillation circuit, and this transmission circuit one transmission unit, a reception antenna for receiving a signal transmitted from the transmitting antenna, a receiving circuit connected to the receiving antenna including a connected transmit antennas,
Reception unit including the analysis processing circuit for outputting a radio wave specifications by analyzing the received radio waves is connected to the reception circuit, each of which is adapted to receive the same said signals simultaneously,
Includes a plurality of the receiving units having the same reception frequency
A group of receiving devices, each of the output data of the plurality of analysis processing circuits is compared with the modulation characteristic of the oscillation output of the replacement oscillation circuit, and the self-diagnosis of the soundness of the plurality of receiving units and the one transmitting unit is checked. A self-diagnosis system for a radio wave transmission / reception device, comprising: an integrated processing device for comparing the outputs of the plurality of analysis processing circuits with each other to diagnose the soundness of the reception device group.