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Optical frequency metering and testing device for laser vibration measurer

A technology of laser vibrometer and measurement test, which is applied in the direction of measuring device, ultrasonic/sonic wave/infrasonic wave, instrument, etc. It can solve the problem that the laser vibrometer cannot be measured and verified, and achieve a wide range of speed signals and ensure accuracy. Effect

Active Publication Date: 2011-08-17
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the laser vibrometer cannot be measured and verified in the high-speed measurement range, and proposes an optical frequency measurement and testing device for the laser vibrometer

Method used

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  • Optical frequency metering and testing device for laser vibration measurer
  • Optical frequency metering and testing device for laser vibration measurer

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Embodiment 1

[0021] An optical frequency measuring and testing device for a laser vibrometer, such as figure 1 As shown in , its peripheral equipment is the laser vibrometer to be tested, which is composed of an optical frequency modulator, a signal generating device, an optical component, a precision attitude adjustment mechanism, a control system and a data acquisition system;

[0022] The optical components are responsible for the necessary light splitting, collimation and convergence of optical frequency modulation, including measuring beam adapter, beam splitter, plane mirror 1, plane mirror 2, plane mirror 3 and angle adjuster;

[0023] The laser light emitted by the laser vibrometer enters the optical frequency modulator after passing through the measuring beam adapter and the beam splitter. The optical frequency modulator realizes the frequency modulation of the measuring light of the laser vibrometer. , the plane reflector 2 and the plane reflector 3 return to the beam splitter, a...

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Abstract

The invention relates to an optical frequency metering and testing device for a laser vibration measurer, belonging to the technical field of metering of laser vibration measurers. The optical frequency metering and testing device comprises one or more than one optical frequency modulator, a signal generator, an optical component, a precise posture adjusting mechanism, a control system and a data collecting system, wherein the optical component is responsible for necessary beam splitting, aligning and converging in optical frequency modulation. The optical frequency metering and testing device provided by the invention uses an optical frequency modulation method to establish equivalent measuring operation environments of the laser vibration measurer; and the simulated speed signal range is wide and can satisfy the metering demands of calibrating steady traits of the laser vibration measurer, and the problem that the existing laser vibration measurer cannot meter under a high speed measuring mode is solved. The optical frequency metering and testing device provided by the invention is suitable for the metering calibration of various laser vibration measurers in a laboratory, can demarcate and verify the critical technical standards of the laser vibration measurer, such as sensitivity, amplitude linearity, measurement and the like, and ensure the accuracy of the measuring data of the laser vibration measurer.

Description

technical field [0001] The invention relates to an optical frequency measuring and testing device for a laser vibrometer, belonging to the technical field of laser vibrometer measurement. Background technique [0002] Laser vibration measurement technology is currently the most important and widely used measurement method in the field of vibration measurement and testing. It has the advantages of non-contact measurement, high precision, small measurement point, fast dynamic response and discrimination of speed direction, etc., and can meet harsh test requirements and harsh conditions. The measurement requirements of vibration parameters in the environment have important application value in the research and development of aviation, aerospace, weapons, ships, machinery and many other fields. Laser vibrometers usually use the laser Doppler effect and are widely used in the vibration and impact of solid surfaces to extract the measurement information of their displacement, velo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 朱振宇李新良梁志国李华丰任冬梅
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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