Double-longitudinal mode laser ranging device and method based on traceable synchronous measuring tapes

Abstract

A double-longitudinal mode laser ranging device and method based on traceable synchronous measuring tapes belongs to phase laser ranging technology. The ranging device includes a measuring tape generation unit, a laser frequency shift unit, a beam-expanding collimating lens group, a measuring light path and a circuit unit. The ranging method includes the following steps: step one, starting a frequency reference laser and a double-longitudinal mode frequency stabilization He-Ne laser; step two, using one beam as a reference laser beam, and using the other beam as measuring laser; step three, using c / |v2-v3| as a precise measuring tape; step four, using c / |v1-v2| as a rough measuring tape; and step five, moving a measuring cone prism to a target end, obtaining phase differences phi1 and phi2 of the precise measuring tape and the rough measuring tape respectively, and finally obtaining measured distance values through formulas. The double-longitudinal mode laser ranging device and method based on the traceable synchronous measuring tapes in the invention solves the problem that phase laser ranging technology lacks a laser ranging device and method capable of giving consideration to large power, multi-measuring tape synchronization and traceability, and has the characteristics of high ranging precision, high measuring efficiency, and strong stability and real-time performance.

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

[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 dual longitudinal mode based on traceable synchronous measuring scales. 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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