Optical detection and measurement radar with multiple sensors

Abstract

The invention provides an optical detection and measurement radar with multiple sensors in order to solve the problems that by means of an optical detection and measurement radar, the number of scanning times of measuring obstacles is not sufficient and the ranging accuracy is limited. The radar comprises a rotary shell, a base, two or more infrared light emission modules, two or more electro-optical ranging units, a rotary drive motor, a slide ring and a corresponding drive circuit, wherein the rotary shell rotates relative to the base, the infrared light emission modules are fixed into the rotary shell and emit infrared detection light, the electro-optical ranging units are fixed into the rotary shell, each electro-optical ranging unit comprises an electro-optical sensor for converting received infrared light signals into electric signals, and the rotary drive motor is used for driving the rotary shell to rotate at a constant speed. By designing the two or more sensors, compared with the optical detection and measurement radar with a single sensor, the number of measurement times within a single measurement cycle is increased, and the ranging accuracy is improved.

Description

technical field [0001] The present application belongs to the field of optical detection radar, and in particular relates to a light detection and measurement radar (Light Detection And Ranging, LIDAR) with two or more sensors. Background technique [0002] Obstacle avoidance is an important topic in the field of intelligent robots and small UAVs. Intelligent robots and unmanned aerial vehicles need to monitor the surrounding environment obstacles in real time during their actions, quickly and accurately determine the location of obstacles, and then avoid them in time. In order to avoid obstacles, it is necessary to measure the distance between the robot or UAV and the obstacle through the ranging device. [0003] At present, there are distance testing methods on the market, mainly laser ranging technology based on the principle of triangulation. The laser emits an infrared beam at a certain angle, and when it encounters an object, the beam will be reflected back; after th...

AI Technical Summary

Problems solved by technology

[0005] However, under strong outdoor light, since the sunlight contains a large number of infrared beams, when the light detection and measurement radar device is working, the receiver not only receives the reflected detection light, but also receives the background light reflected by the sunlight , leading to inaccurate values ​​measured by light detection and measurement radar

In addition, in the existing optical scanning detection device, the scanning probe rotates 360 degrees clockwise or counterclockwise. In each angle state of rotation, the number of scans for obstacle measurement is limited, which limits the accuracy of distance measurement.

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