A range gate control method and device suitable for detecting complex scenes
A technology of complex scenes and control methods, applied in the field of distance gating gate control methods and devices, can solve problems such as unspecified technical solutions, and achieve the effects of simple design structure, accurate detection results, and convenient operation
Active Publication Date: 2020-06-30
HUNAN GUOTIAN ELECTRONICS TECH CO LTD
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Visible, this prior patent application also does not provide the technical scheme that solves the above-mentioned technical problem
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[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0013] Embodiments of the present invention provide a range gate control method suitable for detecting complex scenes, such as figure 1 shown, including the following:
[0014] Real-time detection of all reflected light signals in each detection cycle;
[0015] According to the preset threshold T SNR Determine whether each reflected light signal detected in the current detection cycle is a valid signal, and obtain the peak time t of the first valid signal 1 and the peak time t of the last valid signal 2 , in this embodiment, only two reflected light signals are detected within one detection...
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The invention relates to a range gate control method suitable for detecting a complex scene. The method comprises the following steps of detecting all reflected light signals in each detection periodin real time; according to a preset threshold, judging whether the reflected light signals detected in the current detection period are valid signals or not, and obtaining a peak moment t1 of the first valid signal and a peak moment t2 of the last valid signal; determining opening time of a range gate according to the peak moment of the first valid signal and a preset time advance t3 of opening the range gate, wherein a calculation formula of the opening time ton of the range gate is that ton=t1-t3; and determining closing time of the range gate according to the peak moment of the last valid signal and a preset time delay t4 of closing the range gate, wherein a calculation formula of the closing time of the range gate is that toff=t2+t4. An embodiment of the invention also provides a rangegate control device suitable for detecting the complex scene. The method and the device are suitable for detecting the complex scene.
Description
technical field [0001] The invention relates to the technical field of radar detection, in particular to a range gate control method and device suitable for detecting complex scenes. Background technique [0002] Range-gated striped tube lidar has unique advantages in the field of detection, especially in the field of underwater detection. Its range resolution is high, and the mechanism of range gating can effectively reduce the influence of water body backscatter on measurement results. However, in practice, it is often necessary to detect complex scenes, for example, multiple targets appear in the radar field of view at the same time in the same detection period, the target object or the platform carrying the lidar will move, etc., and the complex scene causes the distance gate to open time and off time cannot be accurately determined, and even the light signal reflected by the target cannot be received. [0003] Based on the above-mentioned technical problems, the applic...
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IPC IPC(8): G01S17/89G01S7/48G01S7/484
CPCG01S7/48G01S7/484G01S17/89
Inventor 江峦陈路尤蓉蓉肖志伟吕冰冰
Owner HUNAN GUOTIAN ELECTRONICS TECH CO LTD