High-precision multi-frequency phase-synchronized laser distance measurement device and method

A technology of synchronizing phase and laser ranging, applied in the directions of measuring device, measuring distance, surveying and navigation, etc., can solve the problem of lack of multiple measuring rulers, and achieve the effect of eliminating drift and jitter

Active Publication Date: 2012-04-18
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] 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 stability of multiple measuring scales in the existing phase laser ranging technology, and to provide a high-precision multi-frequency synchronous phase laser ranging device and method

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  • High-precision multi-frequency phase-synchronized laser distance measurement device and method
  • High-precision multi-frequency phase-synchronized laser distance measurement device and method

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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 , figure 2 , image 3 and Figure 4 Description of this embodiment, a high-precision multi-frequency synchronous phase laser ranging device, which consists of a dual longitudinal mode frequency-stabilized He-Ne laser 1, a multi-scale generating unit 2, a beam expanding collimating mirror group 3, a measuring optical path and a circuit unit 4 Composed of the control box unit 5, the laser output from the dual longitudinal mode frequency-stabilized He-Ne laser 1 is output to the input end of the multi-scale generating unit 2, and the laser output from the multi-scale generating unit 2 passes through the beam expander collimating mirror group 3 to the The input end of the measurement optical path and the circuit unit 4, the phase information output end of the measurement optical path and the circuit unit 4 are connected to the phase information input end of the control box unit 5, and one control output end of the contr...

specific Embodiment approach 2

[0028] Embodiment 2: Different from Embodiment 1, the crystal oscillator 38 of this embodiment adopts a temperature-compensated crystal oscillator, and the short-term frequency stability is better than 0.01ppm. Other components and connections are the same as Embodiment 1.

specific Embodiment approach 3

[0029] Specific implementation mode three: combination figure 1 , figure 2 , image 3 and Figure 4 Illustrate this embodiment, adopt the high-precision multi-frequency synchronous phase laser ranging device described in the specific embodiment one to realize the high-precision multi-frequency synchronous phase laser ranging method, and its specific steps are as follows:

[0030] Step 1. Turn on the dual-longitudinal-mode frequency-stabilized He-Ne laser 1. After preheating and frequency stabilization, the dual-longitudinal-mode frequency-stabilized laser 1 outputs dual-frequency lasers with frequencies f and f′ respectively. The dual-frequency laser passes through The polarization beam splitter 6 is divided into two beams of laser beams whose polarization states are perpendicular to each other, wherein the laser beam with a frequency of f is divided into two beams through the beam splitter prism, and one of the laser beams passes through the polarization rotator, and the ...

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Abstract

The invention relates to a high-precision multi-frequency phase-synchronized laser distance measurement device and method, relates to the technical filed of laser measurement, and mainly relates to a phase laser distance measurement technology. In the invention, the problem that a device and a method capable of realizing both synchronization and stability of multiple measurement gauges are in shortage in the phase laser distance measurement technology is solved. The high-precision multi-frequency phase-synchronized laser distance measurement device comprises a dual-longitudinal-mode frequencystabilization He-Ne laser, a multi measurement gauge generation unit, a beam expanding collimating mirror group, a measuring light path and circuit unit and a control casing unit. The high-precision multi-frequency phase-synchronized laser distance measurement method specifically comprises the following steps of: 1, starting the dual-longitudinal-mode frequency stabilization He-Ne laser; 2, taking one beam of laser as a reference laser beam and the other beam as a measurement laser beam; 3, taking [(f'+f2)-(f+f1)] as the frequency of an accurate measurement gauge and taking (f1-f2) as the frequency of a coarse measurement gauge; 4, moving a measurement corner-cube prism to a target end; 5, obtaining a phase difference phi p; 6, obtaining a phase difference phi c; and 7, obtaining the distance. Thus, the method and device disclosed by the invention can be used for laser distance measurement.

Description

technical field [0001] The invention belongs to the technical field of laser measurement, and mainly relates to a phase laser ranging technology. 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 medium and large parts of aerospace vehicles and giant ships. The superiority of its measurement methods and equipment performance directly affects 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 sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/00
Inventor 谭久彬杨宏兴胡鹏程
Owner HARBIN INST OF TECH
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