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Photoelectric receiving circuit and laser ranging device with same

A technology of photoelectric reception and laser ranging, applied in the field of circuits, can solve problems such as signal crosstalk, achieve the effect of eliminating coupling interference and eliminating the influence of misjudgment

Pending Publication Date: 2022-02-08
BENEWAKE BEIJING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of APD array detection can increase the point cloud density of the laser radar and improve the angular resolution of the laser radar. However, for the optical pulse signal with high energy received, there is a problem of signal crosstalk between APDs, that is, when an APD receives a large energy pulse signal, there is a problem of signal crosstalk. The optical pulse signal will generate electrical crosstalk signals to adjacent APDs, causing the APD that does not receive the optical pulse signal to generate electrical pulse signals

Method used

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  • Photoelectric receiving circuit and laser ranging device with same
  • Photoelectric receiving circuit and laser ranging device with same
  • Photoelectric receiving circuit and laser ranging device with same

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Embodiment Construction

[0026] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] On the one hand, an embodiment of the present invention provides a photoelectric receiving circuit, such as figure 1 As shown, it includes a first avalanche photodiode D1 / APD1 and a second avalanche photodiode D2 / APD2 arranged in an array, and one end of the first avalanche photodiode D1 and the second avalanche photodiode D2 are both connected to a bias power supply VCC_APD1 ( In the figure, the cathode of the avalanche photodiode is connected to the positive bias voltage as an example for illustration), a fi...

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Abstract

The embodiment of the invention discloses a photoelectric receiving circuit and a laser ranging device with the same, relates to the technical field of circuits, and is used for preventing adjacent APDs from generating electric crosstalk. The photoelectric receiving circuit comprises a first avalanche photodiode and a second avalanche photodiode which are arranged in an array mode, one end of the first avalanche photodiode and one end of the second avalanche photodiode are both connected to a bias power supply, a first RC filter circuit is arranged between the bias power supply and the first avalanche photodiode, and / or a second RC filter circuit is arranged between the bias power supply and the second avalanche photodiode.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a photoelectric receiving circuit and a laser distance measuring device with the circuit. Background technique [0002] Pulse laser radar mainly uses APD (avalanche photodiode) as the photodetector of the receiving device. APD has high sensitivity and can detect weak laser pulse signals to achieve long-distance detection. The use of APD array detection can increase the point cloud density of the laser radar and improve the angular resolution of the laser radar. However, for the optical pulse signal with large energy received, there is a problem of signal crosstalk between APDs, that is, when an APD receives a large energy pulse signal, there is a problem of signal crosstalk. The optical pulse signal will generate an electrical crosstalk signal to adjacent APDs, causing the APD that has not received the optical pulse signal to generate an electrical pulse signal. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/4863G01S17/10
CPCG01S7/4863G01S17/10
Inventor 张海武疏达
Owner BENEWAKE BEIJING TECH CO LTD
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