A high-speed laser pulse sampling detection circuit, system and method

Abstract

The present invention provides a high-speed laser pulse sampling detection circuit, system and method. The circuit includes: a laser driver that generates laser pulses driven by a trigger signal; a photoelectric converter connected to the laser driver that converts the laser pulses into current pulses; The linear transimpedance amplifier connected to the photoelectric converter amplifies the current pulse and converts it into a voltage pulse; the low-speed analog-to-digital converter connected to the linear transimpedance amplifier samples the voltage pulse under the sampling clock signal and performs analog-to-digital conversion on it ;Connected to the peak power / half-peak pulse width detector of the low-speed analog-to-digital converter to detect the output signal of the low-speed analog-to-digital converter to obtain the peak power and half-peak pulse width of the laser pulse; connected to the low-speed analog-to-digital converter The multi-phase clock generator generates a sampling clock signal whose phase changes continuously according to the trigger signal. The invention solves the problem that there is no effective solution in the prior art to realize accurate sampling and detection of high-speed laser pulses.

Description

technical field [0001] The invention relates to a 3D sensor and a laser radar system, in particular to a high-speed laser pulse sampling detection circuit, system and method. Background technique [0002] Applications such as autonomous driving, gesture recognition, and machine vision all require high-precision, high-resolution, and real-time ranging functions. Therefore, laser radar and 3D imaging technologies based on TOF (photon time-of-flight) have been more and more widely used. . [0003] TOF-based lidar and 3D imaging technology consists of a transmitter and a receiver. The transmitting end generates a pulse-modulated laser signal, and the receiving end detects the light signal reflected from the target object, and calculates the distance of the target object according to the flight time of the photon. In the dTOF (direct photon time of flight) system, the detection distance and accuracy are mainly affected by the peak power and half-peak pulse width of the optical ...

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a high-speed laser pulse sampling and detection circuit, system and method for solving the problem that there is no effective solution in the prior art to realize accurate sampling and detection of high-speed laser pulses. question

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