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A timing method and device applied to laser radar

A laser radar and laser echo technology, which is applied to measurement devices, uses re-radiation, and electromagnetic wave re-radiation, etc., can solve the problems of complex wavelet analysis, time-consuming, and can not meet the needs of lidar timing and ranging. , to reduce signal processing time, improve stability, and achieve the effect of high-precision timing results

Active Publication Date: 2020-02-21
WUHAN WANJI INFORMATION TECH
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Problems solved by technology

[0004] However, the application of wavelet analysis in embedded systems is more complicated and time-consuming, and it is not able to meet the needs of LiDAR timing and ranging

Method used

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  • A timing method and device applied to laser radar
  • A timing method and device applied to laser radar
  • A timing method and device applied to laser radar

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Embodiment Construction

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] An embodiment of the present invention provides a timing method applied to lidar, see figure 1 , the method includes the following steps:

[0046] Step 101: Using a high-speed ADC to collect the laser echo signal from the signal conditioning circuit to obtain a digital waveform S1.

[0047] In this step, the laser echo signal is collected...

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Abstract

The invention provides a timing method and device for a laser radar, and the method comprises the method comprises the steps: collecting a laser echo signal transmitted by a signal conditioning circuit through a high-speed ADC, and obtaining a digital waveform S1; carrying out the preprocessing of the digital waveform S1, and obtaining a digital waveform S2; carrying out the data processing of thedigital waveform S2, and obtaining a digital value A1 representing the waveform intensity of the digital waveform S2; carrying out the multiplying operation of the digital value A1 of the waveform intensity of the digital waveform S2, and obtaining a digital value A2, wherein A2=A1*F1; searching a point P1 at the rising edge of the digital waveform S2, and enabling the value of the point P1 to beequal to the digital value A2, wherein the time corresponding to the point P1 is the receiving time of the laser echo signal. The method can provide a simple, quick, stable and high-precision timingresult.

Description

technical field [0001] The invention relates to the technical field of laser ranging, in particular to a timing method and device applied to laser radar. Background technique [0002] Lidar is a photoelectric system that uses laser light for distance perception. It is more and more widely used in military, agricultural, engineering, and transportation fields. Especially in the field of transportation, with the rapid development of unmanned driving technology, higher requirements are put forward for the speed, accuracy, anti-interference ability and multi-dimensional detection ability of lidar. Conventional lidar based on analog technology can no longer meet the requirements. With the rapid development of modern photoelectric acquisition technology, especially high-speed Flash ADC technology, LiDAR based on digital receiving and processing technology has gradually become a hot spot in LiDAR research and application. The digital-based lidar uses an ADC with a sampling rate a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08G01S7/48
CPCG01S7/4802G01S17/08
Inventor 贺进王泮义王庆飞
Owner WUHAN WANJI INFORMATION TECH