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Vehicle-mounted laser radar range measurement and metering test system and method

A vehicle-mounted lidar, measurement and testing technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as inability to measure accurately by radar, and achieve the effect of convenient distance measurement and easy operation

Pending Publication Date: 2021-02-23
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

The disadvantage of this method is that the callback simulator has a certain response time for receiving laser and emitting laser, and the theoretical accuracy is greater than 10 cm, which cannot accurately measure the radar.

Method used

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  • Vehicle-mounted laser radar range measurement and metering test system and method
  • Vehicle-mounted laser radar range measurement and metering test system and method

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specific Embodiment

[0027] Such as figure 2 As shown, the present invention provides a vehicle-mounted lidar distance measurement and measurement test system, including a test bench 1, a telescope receiving subsystem 2, two apertures, an integrated fiber coupler 6, an optical fiber 7 and a collimation subsystem 8, By adjusting the central axis of the telescope receiving subsystem 2, the two apertures, and the fiber coupler 6 in a straight line, it aims to solve the problem of accurate measurement of the range measurement accuracy of the vehicle-mounted laser radar.

[0028] Among them, the optical fiber 7 used is a multimode graded optical fiber, the fiber coupler 6, the optical fiber 7 and the collimation subsystem 8 are integrated into one, the optical axes are coaxial, and the double diaphragm reduces the diameter of the light velocity and collimates it to ensure the incident half-cone angle smaller than the critical angle of incidence of the fiber.

[0029] The method for the vehicle-mounte...

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Abstract

The invention relates to a vehicle-mounted laser radar range measurement and metering test system and method, and the system comprises an experiment table which is provided with a laser radar and a reference laser range finder, and is also provided with a telescope receiving subsystem, a first diaphragm, a second diaphragm, and an optical fiber coupler in a coaxial mode. The optical fiber coupleris further connected with the collimation subsystem through an optical fiber, a matched metering test method uses a value measured by the reference laser range finder as a reference, and after a measured value of the laser radar is compared with a reference value, the range measurement precision of the laser radar is obtained. Compared with the prior art, the method has the advantages of being simple, scientific, accurate, easy to operate, capable of greatly facilitating range measurement and metering of the to-be-detected laser radar, capable of achieving range measurement and metering of to-be-detected laser radars of different sizes and models and the like.

Description

technical field [0001] The invention relates to the technical field of unmanned vehicle sensors, in particular to a vehicle-mounted laser radar range measuring and testing system and method. Background technique [0002] Vehicle-mounted laser radar (LiDAR) is an important sensor for advanced assisted driving, three-dimensional reconstruction of the environment for autonomous driving, obstacle detection, and vehicle positioning. It has been widely used by driverless car companies. Its principle is to determine the distance by measuring the time difference and phase difference of the laser signal, measure the angle by horizontal rotation scanning or phase control scanning, and establish a two-dimensional polar coordinate system based on these two data, and then obtain the first signal by obtaining signals of different pitch angles. For three-dimensional height information, the current detection distance of vehicle-mounted lidar has reached about 150 meters, and the accuracy ha...

Claims

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Application Information

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IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 凌铭武志超
Owner SHANGHAI UNIV OF ENG SCI
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