Indoor quantitative performance detection system for radar emitting slave laser

A technology of laser radar and quantitative detection, applied in the direction of radio wave measurement system, instrument, etc., to achieve the effect of good quantification, high stability and simple operation

Active Publication Date: 2018-12-18
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide an indoor quantitative detection system for emission follow-up laser radar performance, whic

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  • Indoor quantitative performance detection system for radar emitting slave laser

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Example Embodiment

[0009] As a specific implementation, the full emission mirror 2 and the emission system of the lidar 1 are formed at 45°.

Example Embodiment

[0010] As a specific implementation, the total reflection mirror 2, the first beam splitter 3 and the second beam splitter 4 are parallel to each other.

[0011] As a specific implementation, the transmission screen 6 and the mechanical axis of the transmission system of the lidar 1 are parallel.

[0012] As a specific implementation, the CCD camera 7 faces the transmissive screen 6.

[0013] As a specific implementation, the laser echo and background light characteristic database 22 provides laser echo signals and background light noise signals under specific conditions, and the specific conditions include conditions such as different target reflectivity and sunlight.

[0014] As a specific implementation, the lengths of the optical fibers 13 in the multi-distance optical fiber delay assembly 25 are all different.

[0015] The specific working process of the system of the present invention is as follows:

[0016] The laser light emitted from the tested lidar 1 changes its direction thro...

Example Embodiment

[0021] Example 1

[0022] In order to verify the effectiveness of the system of the present invention, this embodiment builds the following detection system. The tested lidar 1 is a binocular lidar with a wavelength of 905nm and a frequency of 10KHz; the total mirror 2 is a 905nm total mirror; the splitting ratio of the beam splitters 3 and 4 is 4:1; the optical power detector is a LaserPoint company PD50-D9-VIS photoelectric power meter; the transmissive screen 6 and the simulated target 20 are semi-transparent black acrylic plates; the CCD camera 7 model is MTV-1881EH; the detectors used in the optical receivers 8, 14, 15, 16 are Beijing Minguang Technology Co., Ltd.’s 0.5mm Fast Silicon PIN photodiode; distance gate switches 9 and 17 are realized by EPCS1N series FPGA programmable devices; the laser used for optical transmitters 10, 11, 12 and programmable laser echo source is Hamamatsu’s L11854-307- 05 Pulsed laser diode; Fiber 13 is 9 / 125 single-mode fiber; Programmable bac...

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Abstract

The invention discloses an indoor quantitative performance detection system for a radar emitting slave laser, comprising a laser radar, a total reflecting mirror, a first beam splitter, a second beamsplitter, an optical power detector, a transmission screen, a CCD camera, an optical receiver, a first distance gating switch, a multi-distance optical fiber delay component, a second distance gatingswitch, a program-controlled laser echo source, a program-controlled background optical noise source, a simulated aimed target, a precision electronically controlled positioning stage, a laser echo and background light characteristics database, a timing control and data acquisition module and a computer processing system. According to the indoor quantitative performance detection system for a radar emitting slave laser, the quantitative problem of indoor detecting laser radar ranging performance is effectively solved by introducing design schemes in which a echo target moves with the emissionoptical axis and the echo intensity changes with the laser emission power and the sunlight background in real time. At the same time, with the advantage of CCD image test, the test problems of laserradar emission field of view and optical axis pointing are solved. The invention can be applied to the detection of the laser radar emission field of view, the optical axis pointing and the ranging performance, and has the outstanding advantages of good quantification, simple operation, and no limitation on the site and the weather.

Description

technical field [0001] The invention relates to a laser radar performance detection system, in particular to an indoor quantitative detection system for emission follow-up laser radar performance. Background technique [0002] Lidar has the characteristics of strong anti-interference ability and high resolution, and has been widely used in the fields of distance measurement, speed measurement, angle measurement and tracking. The performance evaluation of laser radar is a key link in the production process of laser radar. At present, it is mainly solved by the fixed-point ranging method in the field, that is, a target with a specific reflectivity is placed at a specific distance, and then the laser radar is aimed at it. ranging. This method is not only limited by the target distance in the field, but also affected by atmospheric visibility and sunlight background. The paper "Simulation Research on Long-distance Laser Ranging Based on Variable Fiber Delay Lines [D]" (Zhao Me...

Claims

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Application Information

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IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 来建成郭少华李振华王春勇严伟纪运景
Owner NANJING UNIV OF SCI & TECH
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