JPH054070U - Radar equipment - Google Patents

Abstract

(57) [Summary] [Purpose] When a transmission direction abnormality occurs in the transmission direction indicator circuit, it detects it and suspends transmission to prevent a tracking abnormality state. A transmission detection circuit 11, a switching circuit 13, and a transmission suspension circuit 14 are provided to identify a transmission direction abnormality in a transmission direction instruction signal by a transmission detection level and generate a transmission suspension signal to damage the transmission / reception module 3. Status and abnormal tracking status are prevented from occurring, and normal tracking status is secured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in a radar device used for target search and detection and tracking of, for example, aircraft and ships.

[0002]

[Prior Art]

 FIG. 3 is a diagram showing the configuration of a conventional radar device. In the figure, 1 is an antenna (hereinafter referred to as “ANT”), 2 is a transmission / reception switching unit (hereinafter referred to as “TR unit”) that switches between transmission radio waves and reception radio waves. 3 is a transmission / reception module (hereinafter referred to as “MDL”), 4 is a transmission direction instruction circuit, 5 is an exciter, 6 is a receiver, 7 is a frequency conversion mixer (hereinafter referred to as “MIX”), and 8 is a local signal generation unit. (Hereinafter referred to as "LOC"), 9 is a receiver unit, and 10 is a signal processing unit that performs signal processing for search and tracking.

Next, the operation will be described. In such a configuration, the high frequency pulse power amplified by the MDL 3 by the high frequency pulse for transmitting radio wave generated by the exciter 5 is radiated to the outside from the ANT 1 via the TR unit 2. Next, the wave reflected upon hitting the target is received by ANT1 again, passes through TR section 2, is amplified by MDL3, undergoes waveform processing by receiver 6 and undergoes frequency conversion by MIX7, is sent to receiver section 9 and is amplified and detected. , To the signal processing unit 10.

Next, a description will be given with reference to FIG. Reference numeral 16 is a transmission pulse, 17 is a transmission / reception switching signal, 18 is a reception real video, 19 is a gate before capturing, 20 is a gate after capturing, 21 is a gate before tracking, 22 is a gate after tracking, 23 is a receiver output, 24 is tracking. Video output, 25 is a transmission direction abnormal state in the transmission direction instruction circuit (hereinafter referred to as "transmission direction abnormal"), 26 is an MDL damage state, 27 is a receiver output abnormal state (hereinafter referred to as "reception abnormal state"), 28 is It is in an abnormal tracking state.

When the transmission pulse is radiated from ANT1, the target is determined by the video received during the reception state of the transmission / reception switching signal, and the areas before entering the gates before capture 19 and the gate after capture 20 are compared. 21, the gate is changed to the post-tracking gate 22, and the target tracking is maintained so that the areas of the tracking videos entering the pre-tracking gate 21 and the post-tracking gate 22 become equal. At this time, if the transmission direction abnormality 25 occurs in the transmission direction instruction circuit, the MDL damage state 26 occurs, so the reception abnormality state 27 and the tracking abnormality state 28 occur.

[0006]

[Problems to be solved by the device]

 Since the conventional radar device is configured as described above, when an abnormal transmission direction occurs, an MDL damage state and an abnormal reception state occur, which causes a problem that an abnormal tracking state occurs.

The present invention has been made to solve the above problems, and when an abnormal transmission direction occurs, the present invention is configured to detect the abnormal MDL damage condition, abnormal reception condition, and tracking. The purpose is to prevent the occurrence of abnormal conditions.

[0008]

[Means for Solving the Problems]

 The radar device according to the present invention is provided with a transmission direction abnormality state detection circuit, a switching circuit, and a transmission suspension circuit, and detects a transmission direction abnormality in the transmission direction instruction circuit and transmits it to the MDL. The pulse is switched so as not to be transmitted so as to prevent the MDL damage state and prevent the abnormal tracking state from occurring.

[0009]

[Action]

 The radar device according to the present invention is provided with a transmission direction abnormality state detection circuit, a switching circuit, and a transmission suspension circuit, and switches so as not to transmit a transmission pulse to the MDL when a transmission direction abnormality occurs in the transmission direction instruction circuit. As a result, the MDL damage state is prevented, so that it is possible to prevent the occurrence of an abnormal tracking state and ensure a normal tracking state, and also to process the received echo from the target without error when searching and tracking the target. You can do it.

[0010]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 11 is a transmission direction abnormal state detection circuit (hereinafter referred to as "transmission detection circuit"), 12 is a transmission direction instruction signal, 13 is a switching circuit, 14 is a transmission suspension circuit, and 15 is a transmission suspension signal.

Next, the timing of each signal will be described with reference to the drawings. In FIG. 2, reference numeral 29 is a transmission detection circuit output, 30 is a transmission detection level, 31 is a transmission pulse pause state, 32 is an MDL protection state, 33 is a receiver output pause state, and 34 is a normal tracking state.

In the radar device configured as described above, when a transmission direction abnormality 25 occurs in the transmission direction instruction circuit 4, the transmission detection circuit 11 detects it by the transmission direction instruction signal 12 and detects it. 13 performs a logical product with the transmission / reception switching signal 17, is identified by the transmission detection level 30 in the transmission pause circuit 14, obtains the transmission pause signal 15 and is sent to the exciter 5, and becomes the transmission pulse pause state 31 and the MDL protection state 32. The receiver output suspension state 33 and the normal tracking state 34 are set.

[0013]

[Effect of the device]

 As described above, this invention is provided with the transmission detection circuit and is configured not to generate a transmission pause signal and transmit a transmission pulse when a transmission direction abnormality is detected in the transmission direction instruction circuit. It is possible to prevent this, and at the same time, it is possible to process the received echo from the target without error when searching and tracking the target.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a timing diagram showing a state of each signal of transmission and reception of the present invention.

FIG. 3 is a configuration diagram of a conventional radar device.

FIG. 4 is a timing diagram of a conventional radar device.

[Explanation of symbols]

 1 ANT 2 TR section 3 MDL 4 transmission direction instruction circuit 5 exciter 6 receiver 7 MIX 8 LOC 9 receiver section 10 signal processing section 11 transmission detection circuit 12 transmission direction instruction signal 13 switching circuit 14 transmission suspension circuit

Claims (1)

[Claims for utility model registration] Claims: 1. In a radar device having a function of searching for and tracking a target and receiving an echo from the target, a transmitted radio wave is radiated to the outside to cause a reflected wave from the target or an abnormality. An antenna for receiving waves, a transceiver module that generates high-frequency pulse power and amplifies received radio waves, a transmission / reception switching unit that switches the reception radio waves input from the antenna and the transmission radio waves output from the transmission / reception module, An exciter that generates high-frequency pulses for transmitting radio waves, a transmission direction indicator circuit that indicates the transmission direction of the transmission radio waves, and a transmission direction abnormality state detection that detects a transmission direction abnormality state in the transmission direction instruction circuit A circuit, a switching circuit that performs a logical product of the output of the transmission direction abnormal state detection circuit and the transmission / reception switching signal, and the output of the switching circuit is identified and transmitted. A transmission pause circuit that sends a stop signal to the exciter, a receiver that processes the waveform of the received radio wave, a frequency conversion mixer that frequency converts the received radio wave to an intermediate frequency, and a local signal that converts the received radio wave to the intermediate frequency. After amplifying the generated local signal generator and the frequency conversion mixer output,
A radar apparatus comprising: a receiver section that outputs a video signal; and a signal processing section that receives the output of the receiver section and performs signal processing for search detection and tracking.