Dual-laser driving circuit and scanning laser radar ranging device and method

Abstract

The present invention relates to a dual-laser driving circuit and a scanning laser radar ranging device and method. The circuit comprises a voltage doubler unit for outputting a pulsed high voltage toa first node when a first driving pulse signal is received, a power storing and releasing unit used for storing electric energy when a pulse voltage is present at a first node, releasing a first electric quantity to a second node when a second driving pulse signal is received and releasing a second electric quantity to the second node when a third driving pulse signal is received, and a light emitting unit which is used for generating a laser signal of first power when the first electric quantity is inputted at the first node and generating a laser signal of second power when the second electric quantity is inputted at the second node. The scanning laser radar ranging device is realized based on the above circuit. The method is realized based on the above device. According to the embodiment of the present invention, the requirements of human eye safety by near-distance laser power can be ensured, stray light at a close range is filtered, far-distance and near-distance ranging is achieved, and the ranging ability of a lifting device is improved.

Description

technical field [0001] The invention relates to the technical field of laser detection, in particular to a dual laser drive circuit and a scanning laser radar ranging device and method. Background technique [0002] With the continuous development of laser technology, lidar has been used more and more widely in various fields. For example, in the field of detection, lidar is often used to detect dynamic objects. At this time, the measurement angle increases and requires no blind spots, and it also needs to adapt to long-distance or short-distance ranging. When the distance is measured at a short distance, the power of the lidar is small, which can meet the safety requirements of human eyes, but the distance measurement ability is weak; Stray light will increase and make it unusable at a distance. [0003] When realizing the technical solution of the present invention, the inventors of the present application found that: in order to solve the above problems, the automatic g...

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Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a dual laser drive circuit and a scanning laser radar distance measuring device and method, which are used to solve the problems caused by the large lag in the automatic adjustment of the laser radar or the long charging time in the prior art. The problem that lidar cannot achieve fast distance measurement

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