A Separate Band Background Light Simulator for LiDAR Performance Testing

Abstract

The present invention proposes a separated-band background light simulator for laser radar performance detection, including a control module, a background light characteristic database, an adjustable constant current source drive circuit, a light source module, an illumination optical system, a sampling feedback optical path, and an illumination sensor and feedback control circuit. The illumination optical system introduced in the present invention includes a condenser cover, an optical integrator, a collimator mirror and a light outlet, which can realize light concentration, light uniformity and collimation, so that the system can not only accurately simulate the sunlight illumination of multiple bands, but also can It is good for simulating the collimation and illuminance uniformity of sunlight; the introduction of the background light characteristic database can simulate the background light interference at specific wavelengths under different ground objects and weather, and is suitable for use as a background light jammer for indoor detection of lidar performance. It has outstanding advantages such as clear principle, simple structure and stable work.

Description

technical field [0001] The invention relates to a sub-band sunlight simulator technology, in particular to a separate-band background light simulator for laser radar performance detection. Background technique [0002] Lidar has the characteristics of strong anti-interference ability and high resolution, and has been widely used in military and civilian fields such as ranging, speed measuring, angle measuring and tracking. Lidar performance testing and evaluation is a key link in the production process of Lidar. Generally, the ranging performance of Lidar is evaluated through the actual ranging test in the field. The weather conditions in the field are changing rapidly. On the one hand, the test conditions provided are unstable, and on the other hand, the quantitative and accurate characterization Weather conditions bring great difficulties to the quantitative evaluation of lidar ranging performance. In order to artificially simulate the ranging environment of lidar and rea...

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Problems solved by technology

Patent No.: 201610638215.5 - "A High-precision Solar Simulator", including main light source and filter device, auxiliary light source and filter device, power supply, temperature detection module, irradiance detection module, spectrum detection module, time control The circuit uses xenon lamp as the main light source and LED as the auxiliary light source. Through the adjustment of the two light sources, the illuminance is relatively stable and the spectral distribution is basically consistent with the sunlight. However, it is used as a laser radar receiver performance and ranging performance test. When the background light interferes, due to the narrow optical bandwidth of the laser radar, it is difficult to accurately simulate the spectral irradiance at the working wavelength of the laser radar, and it cannot reflect the influence of the weather and ground features on the background light interference

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