Multi-channel peak detection integrated circuit and laser radar echo peak acquisition system

Abstract

The invention discloses a multi-channel peak detection integrated circuit and a laser radar echo peak acquisition system. The multi-channel peak detection integrated circuit includes: a ramp voltage generation module and an echo peak digital signal generation array; the echo peak digital signal generation array includes multiple echo peak digital signal generation modules; a ramp voltage generation module and each echo peak digital signal The signal generation module is connected; the slope voltage generation module is used to generate the slope voltage signal; the echo peak digital signal generation module is used to receive the voltage pulse signal converted from the echo signal of the laser pulse and perform peak acquisition and hold, when the slope voltage signal is greater than the voltage Output the digital signal of the echo peak value when the pulse signal is acquired and held at the peak value. Compared with the existing peak detection module, the multi-channel peak detection integrated circuit and laser radar echo peak acquisition system of the present invention have higher integration and detection efficiency, and are suitable for laser radar receiving units for array detection.

Description

technical field [0001] The invention relates to the technical field of laser pulse echo peak detection, in particular to a multi-channel peak detection integrated circuit and a laser radar echo peak acquisition system. Background technique [0002] Lidar imaging can be divided into range image, grayscale image, etc. Range imaging depends on the feasibility and accuracy of the ranging method, in which the pulse time-of-flight (TOF, Time of Flight) method is based on measuring the flight of laser pulses in space Time further obtains the distance information between the measuring instrument and the target. On the basis of this ranging method, a grayscale image can be obtained by measuring the echo pulse peak value. The echo peak information can be used to characterize the object’s response to the laser. The strength of the signal scattering ability and the radiation characteristics of the target. [0003] At present, domestic research on the acquisition framework of the peak e...

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Problems solved by technology

[0003] At present, domestic research on the acquisition framework of the peak echo information of lidar receivers is still immature. Many peak detection modules have been integrated into the interior of lidar receivers, but it is still necessary to connect the collected echo peak information to an external ADC (Analog to Digital Converter, analog-to-digital converter) for digital signal conversion, low integration, mostly used in single-point detection

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