Traceable Superheterodyne Precision Ruler Hybrid Laser Distance Measuring Device and Method

Abstract

The invention discloses a traceable superheterodyne-type accurate-measurement-ruler mixed-laser-device ranging device and method and belongs to a phase laser ranging technology. The ranging device includes a measurement ruler generation unit, a laser frequency shifting unit, a beam-expansion calibration lens group, a measurement optical path and a circuit unit. The ranging method includes the following steps: step1: starting a frequency reference laser device and a semiconductor laser device; step2: using one beam as a reference laser beam and the other as measurement laser; step3: using c / |v2-v3| as an accurate measurement ruler; step4: using c / |v1-v2| as a rough measurement ruler; and step5: moving a measurement corner cube to a target end and respectively obtaining phase differences Phi1 and Phi2 of the accurate measurement ruler and the rough measurement ruler and obtaining a measured distance value through a formula at last. The device and method solve a problem that in a phase laser ranging technology, a laser ranging device and method capable of realizing large power, multi-measurement-ruler synchronization and traceability are lacked and have the characteristics of being high in ranging flexibility, simple in ranging steps, high in measurement efficiency and high in stability and instantaneity.

Description

technical field [0001] The invention belongs to phase laser measurement technology, and mainly relates to a phase laser distance measuring 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 t...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the current phase laser ranging technology lacks a laser ranging device and method that can take into account high power, multi-scale synchronization and traceability, and to provide a traceable ultra-external Differential fine measuring ruler hybrid laser ranging device and method to 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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