JPH04118684U - target detection device - Google Patents

Abstract

(57) [Summary] [Purpose] A target detection device that has a memory that stores the presence or absence of a target in three-dimensional space, which enables accurate and prompt detection and position determination of a target in a wide range of beam electron scanning. get. [Structure] A target signal is obtained from a video signal from a receiver 4 using an A/D conversion circuit 6, a video integration circuit 7, a threshold signal generation circuit 8, and a target detection circuit 9.
The target signal is transmitted to the compass control circuit 11 and the S/D conversion circuit 1.
2, the beam electronic scanning control section 13, the beam elevation angle calculation processing 14, the coordinate conversion circuit 15, and the memory control section 16 are used to store the target signal at a position corresponding to the three-dimensional space in the memory A10, and the center of gravity position of the target signal is stored as the center of gravity. Position detection circuit 17
is detected and stored in memory B.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea enables accurate and precise targeting of targets during searches using wide-area beam electronic scanning. This invention relates to a target detection device that detects targets promptly.

0002

[Conventional technology]

Figure 2 shows the configuration of a conventional target detection device. A transmitting/receiving antenna that transmits waves or receives radio waves, 2 is the height that is sent to 1 above. A transmitter that generates a frequency power pulse, 3 is a high frequency power pulse that is sent to the above 1, and the above Transmission/reception switching circuit that switches the received wave from 1, 4 detects the received wave from 1 above. The receiver 5 displays the video signal from this receiver 4 in two dimensions of distance and azimuth. This is an indicator that displays

0003 In such a configuration, the high frequency power pulse generated by the transmitter 2 can be switched between transmission and reception. It passes through the circuit 3 and is radiated to the outside as a transmission radio wave via the transmitting/receiving antenna 1. eye The reflected power from the object is sent to the transmission/reception switching circuit as a transmission wave via the transmission/reception antenna 1. 3 and input to the receiver 4, where the received wave is detected and becomes a video signal. This is displayed on a display 5 that displays the target in two dimensions, distance and azimuth.

0004

[Problem that the idea aims to solve]

Conventional target detection equipment is configured as described above, so it can detect a wide range of beam electrons. Target detection and position determination during scanning searches can be visually confirmed by the operator on the display. When specifying the target position by setting markers and decrease in target detection distance, increase error in target position data, and increase reaction time. The main problem was that the operator's workload increased due to the increased search range.

[0005] This idea was made to solve the problems mentioned above, and it has a wide range of uses. Even in electronic scanning, targets can be detected and located quickly and accurately. The purpose is to

[0006]

[Means to solve the problem]

The target detection device according to this invention converts the video signal obtained from the receiver into an A/D converter. This digital signal is integrated for each range bin, and the target detection is performed. Based on a threshold signal that varies depending on the magnitude of the video signal by the output circuit. In addition to obtaining information on the presence or absence of the target signal for each range bin, the transmission and reception radio waves at this time are Information on the presence or absence of a target signal is stored in the memory A position corresponding to the pointing position, and this eye The center of gravity of the target signal is detected, and as a result, the center of gravity of the target signal is detected in memory B. The presence or absence of a mark is memorized.

[0007]

[Effect]

Memory B in this invention is a two-dimensional display based on distance and azimuth that is performed by the operator. The processor takes notes when specifying the target position by setting markers on the display. By reading the contents of RiB, you can quickly and accurately calculate distance, azimuth, Three-dimensional target position data at elevation angles can be obtained.

[0008]

【Example】

Example 1. FIG. 1 shows an embodiment of this invention, and in the figure, 1 to 5 are the above-mentioned conventional technology. The same is true. 6 is an A/D converter that converts the video signal from the receiver 4 into a digital signal. 7 is a video integration circuit that integrates the video signal from this A/D conversion circuit 6. , 8 is a target detection variable that changes depending on the magnitude of the video signal from the video integration circuit 7. 9 is a threshold signal generation circuit that generates a threshold signal for output. The threshold signal from the threshold signal generation circuit 8 and the video integration circuit 7 target detection, which detects a target from a video signal by comparing it with the video signal from 10 is a memory A for storing the target signal from the target detection circuit 9; 11 is an output circuit; The compass control circuit 12a, 12b drives the transmitting and receiving antenna. Azimuth angle synchronization signal and elevation angle synchronization signal in the bow reference deck surface polar coordinate system from the circuit 13 is an S/D conversion circuit that converts black signals into digital signals; A beam electron scanning control unit 14 is for scanning in the direction of elevation angle. In order to obtain a beam elevation angle synchronized with beam electronic scanning in the elevation angle direction using scanning control. Beam elevation angle calculation processing 15 is an azimuth angle signal from the S/D conversion circuit 12a and The beam elevation angle signal from the beam elevation angle calculation process 14 is converted to the north reference horizontal plane polar coordinate system. A coordinate conversion circuit 16 converts the azimuth angle and elevation angle of The target signal from the target detection circuit 9 is determined based on the azimuth and elevation angle of the target. 17 is a memo. A gravity center position detection circuit for detecting the gravity center position of a target signal stored in rear A10, 1 Reference numeral 8 denotes a memory for storing the target center of gravity position from this center of gravity position detection circuit 17; It's Rocessa.

[0009] Next, the operation will be explained. 1 to 4 are equivalent to the conventional one. Video from receiver 4 The audio signal is converted into a digital signal by the A/D conversion circuit 6, and the digital video signal is converted into a digital signal. The signal is integrated for each range bin in the video integration circuit 7, and the threshold signal generation circuit A threshold signal that varies depending on the magnitude of the video signal integrated by path 8. is generated, and the target detection circuit 9 combines the video signal from the video integration circuit 7 with the threshold. The threshold signal from the threshold signal generation circuit 8 is compared with the threshold signal from the video signal. Obtain information on the presence or absence of a target signal for each bin. On the other hand, the pointing position of the transmitted and received radio waves at this time In order to obtain the position, the azimuth angle in the polar coordinate system of the bow reference deck surface is determined from the azimuth board control circuit 11. Obtain a synchro signal and an elevation angle synchro signal. This is the S/D conversion circuit 12a, 1 The signal from the S/D conversion circuit 12b is converted into a digital signal by the S/D conversion circuit 12b. The beam in the elevation angle direction by the beam electronic scanning control unit 13 is calculated by the beam elevation angle calculation process 14. The beam electronic scanning angles are added together to obtain a beam elevation angle synchronized with the beam electronic scanning. this The beam elevation angle obtained in this manner and the azimuth angle from the S/D conversion circuit 12a are The standard conversion circuit 15 converts it to the north reference horizontal and polar coordinate system, and this is the direction of the transmitted and received radio waves. position. Based on the directional position of the transmitted and received radio waves, the memory control unit 16 The information on the presence or absence of a target signal for each range bin from the target detection circuit 9 is It is stored in the position of the memory A10 corresponding to the elevation angle, and the center of gravity position detection circuit 17 stores it in the memory A10. The target weight obtained after detecting the center of gravity position from the target signal stored in Mori A10 The heart position is stored in the memory B18, and as a result, the three-dimensional space is stored in the memory B18. The presence or absence of a target will be memorized. The display 5 shows the contents of the memory B18. Displays distance and azimuth. In this situation, the operator should check the target on the display 5. When a marker is set at a position, the processor 19 selects the marker from among the contents of memory B18. Reads all directions including the distance, azimuth, and elevation angle set by the marker. 3D data with accurate distance, azimuth, and elevation angles within the read range. Target position data can be obtained quickly.

0010

[Effect of the idea]

As described above, according to this invention, the presence or absence of a target in three-dimensional space is memorized. Since memory B is provided, target detection and location during search by wide beam electronic scanning is possible. The operator determines the target position by visual inspection on the display and by setting markers. The processor reads the contents of memory B when the This has the effect of quickly obtaining accurate target position data.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a target detection device according to an embodiment of the invention.

FIG. 2 is a configuration diagram showing a conventional target detection device.

[Explanation of symbols]

1 Transmission/reception antenna 2 Transmitter 3 Transmission/reception switching circuit 4 Receiver 5 Display 6 A/D conversion circuit 7 Video integration circuit 8 Threshold signal generation circuit 9 Target detection circuit 10 Memory A 11 Direction board control circuit 12 S/D conversion circuit 13 Beam electronic scanning control section 14 Beam elevation angle calculation process 15 Coordinate conversion circuit 16 Memory control section 17 Center of gravity position detection circuit 18 Memory B 19 Processor

Claims (1)

[Scope of utility model registration request] Claim 1: A target detection device for searching and detecting targets using radar signals, comprising: a transmitting/receiving antenna that transmits transmitted radio waves or receives received radio waves; a transmitter that generates high-frequency power pulses; and a radio-frequency power pulse and receiver. A transmission/reception switching circuit that switches waves, a receiver that detects waves received from the antenna, an A/D conversion circuit that converts the video signal from the receiver into a digital signal, and a video signal from the A/D conversion circuit. a threshold signal generating circuit that generates a threshold signal for target detection that changes depending on the magnitude of the video signal from the video integrating circuit; and a threshold signal generating circuit that integrates the threshold signal from the threshold signal generating circuit and the video signal. A target detection circuit that detects a target signal by comparing the video signal from the integrating circuit, a compass control circuit that drives the transmitting and receiving antenna, and a compass control circuit that detects the target signal by comparing it with the video signal from the integrating circuit; An S/D conversion circuit that converts the azimuth angle synchronization signal and the elevation angle synchronization signal into digital signals, a beam electronic scanning control circuit that controls the beam electronic scanning in the elevation direction, and a beam synchronized with the beam electronic scanning in the elevation direction. Beam elevation angle calculation process to obtain the elevation angle and the above S/D
A coordinate conversion circuit that converts the azimuth angle signal from the conversion circuit and the beam elevation angle signal from the beam elevation angle calculation processing into the azimuth angle and elevation angle of the north reference horizontal polar coordinate system; The target signal from the target detection circuit is stored in memory A corresponding to the position of the target signal based on the elevation angle.
a memory control unit for storing the target signal at the position of , a memory A for storing the target signal, a barycenter position detection circuit for detecting the barycenter position of the target signal, and a memory B for storing the target barycenter position.
A target detection device detects a target using a display device that two-dimensionally displays a target signal in terms of distance and azimuth, and a processor that reads the contents of a memory B that stores the target center of gravity position.