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High-precision synchronous mixed heterodyne-mode phase laser range finding device and method

A technology of phase laser ranging and high-precision synchronization, which is applied in the field of laser measurement, can solve problems such as lack, achieve the effect of increasing flexibility and overcoming the non-direct traceability of measuring scales

Active Publication Date: 2014-11-19
HARBIN INST OF TECH
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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of the lack of a device and method that can take into account the synchronization and traceability of multiple measuring scales in the existing phase laser ranging technology, and to provide a high-precision synchronous hybrid heterodyne phase laser ranging technology. The range device and method achieve the purpose of increasing the flexibility of ranging, simplifying the steps of ranging, improving measurement efficiency, accuracy, stability, and real-time performance

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  • High-precision synchronous mixed heterodyne-mode phase laser range finding device and method

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[0031] The experimental scheme of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] A high-precision synchronous hybrid heterodyne phase laser ranging device, including a beam expander collimator mirror group 3, said device is composed of a measuring ruler generation unit 1, a laser frequency shift unit 2, a beam expander collimator mirror group 3 and a measuring optical path And the circuit unit 4, the laser output from the measuring ruler generating unit 1 is output to the input end of the laser frequency shifting unit 2, and the laser output from the laser frequency shifting unit 2 is output to the measuring optical path and the circuit unit 4 through the beam expanding collimating mirror group 3 One input end of the laser frequency shifting unit 2, another laser output from the laser frequency shifting unit 2 is directly input to the other input end of the measurement optical path and circuit unit 4;

[0033] ...

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Abstract

A high-precision synchronous mixed heterodyne-mode phase laser range finding device and method belongs to the phase laser range finding technology. The range finding device comprises a measurement ruler generation unit, a laser frequency shift unit, a beam expanding collimating mirror set, and a measurement light path and circuit unit. The range finding method comprises a step 1 of starting a frequency reference laser and a double longitudinal mode frequency stabilization He-Ne laser, a step 2 of taking one beam as a reference laser beam, and another beam as a measurement beam, a step 3 of taking a formula defined in the specification as an accurate measurement ruler, a step 4 of taking a formula defined in the specification as a rough measurement ruler, and a step 5 of moving a measurement cube-corner prism to a target end for obtaining phase differences of the accurate measurement ruler and the rough measurement ruler Phi 1 and Phi 2 respectively and obtaining a to-be-tested distance value through a formula. The invention solves a problem that a device and method for achieving synchronism of multiple measurement rulers and traceability is not available in the phase laser range finding technology, and the device and method provided by the invention is characterized by being high in range finding precision and measurement efficiency, and good in stability and real-time performance.

Description

technical field [0001] The invention belongs to laser measurement technology, and mainly relates to a phase laser ranging device and method. Background technique [0002] Large-scale measurement has attracted much attention in the development of large-scale precision machinery manufacturing, major scientific and technological projects, aerospace industry, shipbuilding industry and microelectronic equipment industry and other large-scale optical-mechanical-electrical integration equipment processing and manufacturing. It is an important basis for the processing and overall assembly of large parts in aerospace vehicles and giant ships. The quality of its measurement methods and equipment performance directly affect the quality of workpieces and assembly accuracy, which in turn affects the operating quality, performance and life of the entire set of equipment. The multi-ruler phase ranging method uses a group of measuring ruler wavelengths from large to small to carry out step-...

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Application Information

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IPC IPC(8): G01S11/12
CPCG01S11/12
Inventor 杨宏兴谭久彬胡鹏程
Owner HARBIN INST OF TECH
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