Laser radar ranging system and ranging method thereof

A technology of laser radar and ranging system, which is applied in the direction of radio wave measurement system, measuring device, electromagnetic wave re-radiation, etc., can solve the problems that the system cannot identify the flight time, the measurement distance is wrong, etc., so as to improve the anti-interference ability and solve the problem of The effect of distance aliasing and improving the ranging range

Active Publication Date: 2020-02-04
ORADAR TECH CO LTD
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Problems solved by technology

At this time, due to the periodicity of the transmitted pulse, the detector will get two flight times after receiving the ...

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  • Laser radar ranging system and ranging method thereof
  • Laser radar ranging system and ranging method thereof
  • Laser radar ranging system and ranging method thereof

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part 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 any creative effort shall fall within the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0032] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than ...

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Abstract

The invention discloses a laser radar ranging system and a ranging method thereof. The laser radar ranging system comprises: a transmitting module for transmitting laser pulse signals to a target areato be measured; a receiving module for receiving echo signals reflected from the target area to be measured; and a control and processing circuit for controlling the transmitting module to transmit laser pulse signals with alternating time intervals to the target area to be measured, controlling the receiving module to receive the echo signals reflected from the target area to be measured, judging the number of echo signals received within the alternating time intervals and the sizes of corresponding flight times, and calculating the distance information of the target area to be measured according to a judgment result. The laser radar ranging system disclosed by the invention improves the ranging range of a laser radar system, solves the problem of distance aliasing, and improves the anti-interference ability of the system at the same time.

Description

technical field [0001] The invention relates to the technical field of laser radar ranging, in particular to a laser radar ranging system and a ranging method thereof. Background technique [0002] At present, laser radar systems generally use TOF (time-of-flight) ranging technology to measure distance. The principle is to transmit continuous laser pulses to the target area, and then receive the echo signal returned from the object through the detector. time difference to calculate the distance information of the target area. Because lidar has the characteristics of long detection distance and high resolution, it is widely used in the perception stage of unmanned driving to ensure the absolute safety of driving. [0003] TOF ranging technology is mainly divided into direct time-of-flight technology and indirect time-of-flight technology according to different detection principles. In the direct time-of-flight technology, such as a pulsed laser is used to emit a periodic la...

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Application Information

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IPC IPC(8): G01S17/08G01S7/483
CPCG01S17/08G01S7/483
Inventor 胡小龙
Owner ORADAR TECH CO LTD
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