Phase type laser distance measuring system

A laser ranging and phase-based technology, applied in radio wave measurement systems, measuring devices, electromagnetic wave re-radiation, etc., can solve the problems of poor anti-interference ability of the system, the transmission signal is submerged in noise, and difficult to extract, etc., to achieve enhanced Anti-interference ability, improved range, simple effect of the system

Active Publication Date: 2015-11-25
SUZHOU YISEN PHOTOELECTRIC TECH CO LTD
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Problems solved by technology

[0004] The traditional phase laser range finder generally has a measurement range of several centimeters to hundreds of meters, and the dynamic range is extremely large. It requires a higher-resolution analog/...

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0042] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0043] Such as figure 1 As shown, the phase-type laser ranging system of the present invention includes: a laser 10 for generating laser signals; a transmitting signal unit 20 for generating transmitting signals, and performing amplitude adjustment and power amplification on the transmitting signals in sequence Send to the laser 10; Return the light receiving unit 30, for receiving the reflected signal of the laser signal; The bias driving unit 40, which is connected to the 10 laser, is used to provide a bias voltage for driving the laser 10 to emit the laser signal; and, the con...

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Abstract

The invention discloses a phase type laser distance measuring system. The system comprises a laser for generating laser signals; an emission signal unit for generating emission signals and sending the emission signals to the laser after amplitude adjustment and power amplification are successively performed on the emission signals; a returning light receiving unit for receiving reflection signals of laser signals; a bias driving unit for providing offset voltages for driving the laser to emit the laser signals; and a controller for outputting PWM pulse voltage signals with an adjustable duty ratio to the bias driving unit to form the offset voltages and receive the emission signals. When the controller receives that the emission signals involves weak reflection, the controller reduces the duty ratio of the PWM pulse voltage signals and improves the amplitude of the emission signals in a linkage mode; and when the controller receives that the emission signals involves strong reflection, the controller increases the duty ratio of the PWM pulse voltage signals and reduces the amplitude of the emission signals in a linkage mode. The system provided by the invention has the advantages of simple system, high anti-interference capability and high distance measuring accuracy.

Description

technical field [0001] The invention relates to the field of laser ranging, and more specifically, the invention relates to a phase type laser ranging system. Background technique [0002] Laser distance measurement uses a laser as a light source for distance measurement. Due to the characteristics of good monochromaticity and strong directionality of the laser, coupled with the integration of electronic circuits and semiconductors, compared with photoelectric rangefinders, it can not only work day and night, but also improve the distance measurement accuracy and significantly reduce weight and power consumption. [0003] At present, laser ranging can be divided into pulse laser ranging and phase laser ranging. Pulse laser ranging, the laser emitted by the rangefinder is reflected by the object to be measured and then received by the rangefinder. The rangefinder records the round-trip time of the laser at the same time, and half of the product of the speed of light and the ...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S17/36
CPCG01S17/08G01S17/36
Inventor 胡佳佳陈新荣
Owner SUZHOU YISEN PHOTOELECTRIC TECH CO LTD
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