A method and system for internal optical path phase compensation based on laser ranging
A laser ranging and phase compensation technology, applied in radio wave measurement systems, measurement devices, electromagnetic wave re-radiation and other directions, can solve the problem that the phase delay of the internal and external optical paths cannot be eliminated.
Active Publication Date: 2018-11-27
SHENZHEN WEIRUI JINGKE ELECTRONICS
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At the same time, the phase delay of the inner and outer optical paths caused by the different power of the laser diodes in the inner and outer optical paths cannot be eliminated
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[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0058] The object of the present invention is to provide a method and system for internal optical path phase compensation based on laser ranging.
[0059] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0060] In the field of laser ranging, the types of laser ranging ...
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The invention discloses an internal optical path phase compensation method and system based on laser range finding, and the method comprises the steps: adjusting the voltage of an avalanche diode, and enabling the amplitude of an internal path signal to be between the maximum voltage peak value and the minimum voltage peak value; obtaining the amplitude of an external optical path; adjusting the amplitude of the internal optical path signal through adjusting the voltage of the avalanche diode and / or the power of an internal optical path laser diode when the amplitude of an external path signal is greater than the maximum voltage peak value or less than the minimum voltage peak value, adjusting the amplitude of the external optical path signal through adjusting the voltage of the avalanche diode, and enabling the amplitude of the internal optical path signal and the amplitude of the external optical path signal to be between the maximum voltage peak value and the minimum voltage peak value; calculating the real phase difference between the internal and external optical paths; and calculating the distance value according to the real phase difference between the internal and external optical paths. The method compensates for the phase difference between the internal and external optical paths in real time, and improves the measuring range.
Description
technical field [0001] The invention relates to the field of laser ranging, in particular to a method and system for phase compensation of an internal optical path based on laser ranging. Background technique [0002] Laser phase ranging is divided into four ranging methods according to the measurement optical path: single transmission and single reception, single transmission and double reception, double transmission and single reception, and double transmission and double reception. [0003] All four ranging schemes can be realized by the difference frequency method: the main vibration signal is emitted by the laser diode, and after a distance D is reflected by the reflective surface to form a reflected signal, after the reflected signal passes through the distance D, it enters the Avalanche PhotoDiode (APD). And mix with the local oscillator signal in APD, amplify and filter the output signal of the mixed frequency to obtain the low-frequency signal, the single-chip micro...
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IPC IPC(8): G01S17/08G01S7/48
CPCG01S7/48G01S17/08
Inventor 孙丛林王少飞
Owner SHENZHEN WEIRUI JINGKE ELECTRONICS