Calibration method for phase measurement, device and distance measuring apparatus

A technology of phase measurement and calibration method, which is applied in the direction of measuring devices, radio wave measurement systems, electromagnetic wave re-radiation, etc. It can solve the problems of easy mechanical failure, long circuit response time, and short service life, so as to strengthen the application and reduce the cost, the effect of reducing performance requirements

Inactive Publication Date: 2009-11-18
SHENZHEN MILESEEY TECH
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Problems solved by technology

[0012] The purpose of the embodiments of the present invention is to provide a calibration method for phase measurement, aiming to solve the problems in the pri

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  • Calibration method for phase measurement, device and distance measuring apparatus
  • Calibration method for phase measurement, device and distance measuring apparatus
  • Calibration method for phase measurement, device and distance measuring apparatus

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] The embodiment of the present invention utilizes the calibration method of dual optical path transmission and single optical path reception, adopts two light wave transmitting devices to generate internal and external optical path signals respectively, and then receives the return signals of the internal optical path signal and the external optical path signal respectively through a signal receiving device, the internal optical path Comparing the phase with the return signal of the external optical path, so as to eliminate the additional phase shift and achieve the purpose of phase error comp...

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Abstract

The invention is applied to the field of electro optical distance measurement and provides a calibration method for phase measurement, a device and a distance measuring apparatus. The method comprisesthe following steps: a first lightwave emission device emits a first lightwave to a measured object, the first lightwave is reflected by the measured object and received by a receiving device, and the lightwave acting as an outer light path signal is generated by modulating a first high-frequency oscillator signal; a second lightwave emission device emits a second lightwave to the receiving device, and the lightwave acting as a substrate reference of an inner light path signal is generated by modulating a second high-frequency oscillator signal; and the receiving device carries out phase comparison of the two paths of lightwaves received one after the other and outputs signals with substrate elimination. The invention realizes phase compensation and calibration and avoids inducing uncertain phase noise to circuits because of environment variation, thereby improving the measurement precision of laser ranging, reducing the effect of environment factor to ranging error, reducing the costof a system and enhancing the application of laser ranging to various industries.

Description

technical field [0001] The invention belongs to the field of photoelectric distance measurement, and in particular relates to a phase measurement calibration method, device and distance measurement equipment. Background technique [0002] With the rapid development of semiconductor lasers and digital circuits since the 1980s, long-distance and high-precision laser ranging technology has become more and more widely used in electric power, water conservancy, communications, environment, construction, police, fire protection, blasting, and navigation. In fields such as railways, military anti-terrorism, etc., phase laser ranging products with millimeter-level measurement accuracy have gradually become dominant in short-range laser ranging within 200 meters. The laser distance measuring device based on the principle of phase difference measurement uses a modulated laser beam to irradiate the measured target. The beam is reflected by the measured target and then turned back. The ...

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Application Information

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IPC IPC(8): G01S7/497G01S17/32
CPCG01S7/497G01S17/36
Inventor 杜鑫伍昕侴智
Owner SHENZHEN MILESEEY TECH
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