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Target detection method and device

A target detection and target technology, which is applied in measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., to enhance the signal-to-noise ratio, improve accuracy, and facilitate effective detection.

Pending Publication Date: 2021-07-13
四川九洲防控科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a target detection method and device to solve the problem of the detection accuracy of the radar system for low, slow and small targets.

Method used

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  • Target detection method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0060] Such as figure 1 As shown, it is a flow chart of the target detection method provided by the embodiment of the present invention, the method may include the following steps:

[0061] Step S101: Receive the echo signal received during the dwell period of the radar scanning beam.

[0062] After receiving the echo signal of the radar, the conventional method in the prior art is: firstly, carry out clutter preprocessing on the radar echo, record the information when the target is detected, and then use the tracking algorithm to obtain the track information of the target , and finally carry out the data transmission and display of the radar target. As mentioned above, this method has certain disadvantages, and it is difficult to ensure the accuracy of target detection while reducing the probability of false alarms.

[0063] The difference from the existing technology is that the detection result is not directly given after each scan of the radar, but the scanning data with...

Embodiment 2

[0088] Such as figure 2 As shown, another flowchart of the target detection method provided by the embodiment of the present invention, the method may include the following steps:

[0089] Step S201: Receive the echo signal received during the dwell period of the radar scanning beam.

[0090] Step S202: sequentially determine each target trace corresponding to each echo signal.

[0091] Step S203: Predict the movement trajectory of the target based on the target traces corresponding to each echo signal.

[0092] Step S204: Determine the next detection area of ​​the target according to the motion trajectory.

[0093] Step S205: Perform threshold lowering detection on the next detection area.

[0094] It should be noted, figure 2 Steps S201 to S205 in the shown method embodiment and figure 1 Steps S101 to S105 in the shown method embodiment are similar, for relevant parts, please refer to figure 1 Relevant content of the shown method embodiment will not be repeated here. ...

Embodiment 3

[0101] Such as image 3 As shown, it is another flow chart of the target detection method provided by the embodiment of the present invention. The method may include the following steps:

[0102] Step S301: Receive the echo signal received during the dwell period of the radar scanning beam.

[0103] Step S302: sequentially determine each target trace corresponding to each echo signal.

[0104] Step S303: Predict the movement trajectory of the target based on the target trace corresponding to each echo signal.

[0105] Step S304: Determine the next detection area of ​​the target according to the motion trajectory.

[0106] Step S305: Perform threshold lowering detection on the next detection area.

[0107] Step S306: Counting the number of first threshold crossings in each target trace whose amplitude is greater than or equal to the first set threshold.

[0108] It should be noted, image 3 Steps S301 to S306 in the method embodiment shown are the same as figure 2 Steps ...

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Abstract

The embodiment of the invention provides a target detection method and device, and relates to the technical field of radar detection, and the target detection method comprises the steps: receiving an echo signal received in a radar scanning beam residence time period; determining each target trace point corresponding to each echo signal in sequence; predicting a motion track of the target based on the target trace point corresponding to each echo signal; determining a next detection area of the target according to the motion trail; and carrying out threshold reduction detection on the next detection area. When the method provided by the embodiment of the invention is applied to target detection, energy accumulation of the low, slow and small target is realized, and the signal-to-noise ratio of the low, slow and small target is enhanced, so that the detection precision of the target is improved, and the track of the target is obtained while the target is detected; besides, threshold reduction detection is carried out on the radar echo signal of the area during detection, so that effective detection of a low-signal-to-noise-ratio target is facilitated, the detection precision of the target can be improved, and the accuracy of target tracking is further improved.

Description

technical field [0001] The invention relates to the technical field of radar detection, in particular to a target detection method and device. Background technique [0002] With the rapid development of unmanned aerial vehicles, higher requirements are put forward for the detection performance of radar. It not only needs to meet the detection of conventional targets, but also has RCS (Radar cross-section, radar cross-sectional area) the detection capability of smaller targets. For the radar system, the most important function is to realize the tracking of the target, and the premise of realizing the tracking of the target is to realize the detection of the target first. However, in the case of strong noise and clutter interference, for slow and small targets, the signal-to-noise ratio of the target is still very low even after coherent accumulation due to the low amplitude of the echo signal received by the radar. In this way, when performing constant false alarm detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/04G01S13/66
CPCG01S13/04G01S13/66
Inventor 何明李春林谭清怡刘艳红李浩
Owner 四川九洲防控科技有限责任公司