A Vibration Measuring System Eliminating the Effect of Base Point Vibration of Laser Vibrometer

Abstract

The invention discloses a vibration measurement system for eliminating the influence of the vibration of the base point of a laser vibrometer, comprising two laser vibrometers, a symmetrical reflective box, a signal amplifier, a data collector, and a processor, wherein the symmetrical reflective box is composed of 6 reflective mirror and a rigid reflector. The present invention can provide a more accurate measurement method for vibration measurement, through the forward and reverse tracking of the same target point by two laser vibrometers at the same position and corresponding optical elements, it can eliminate the laser vibrometer itself Based on the influence of base point vibration, the absolute vibration signal of the measured object can be obtained, which overcomes the defect that the traditional laser vibrometer direct measurement method cannot eliminate the vibration of the laser vibrometer itself caused by site vibration.

Description

technical field [0001] The invention belongs to the technical field of laser vibration measurement, in particular to a vibration measurement system for eliminating the influence of base point vibration of a laser vibration measurement instrument. Background technique [0002] Vibration and noise often bring a lot of troubles to people's lives. In the machinery industry or construction industry, excessive vibration may even bring safety hazards. Therefore, the measurement and analysis of vibration is particularly important for the study of object vibration. The traditional contact measurement method is to arrange several sensors on the measured object, and through the close contact between the sensor and the measured object, the vibration signal of the measured object is collected and analyzed. However, the contact measurement method also has some defects, such as high installation requirements, the sensor must be firmly fixed on the object to be measured, sometimes it is dif...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the prior art, to provide a vibration measurement system that eliminates the influence of the vibration of the base point of the laser vibrometer, which overcomes the defects of limited range and high layout requirements of the traditional contact measurement method, and at the same time overcomes the shortcomings of using The laser vibrometer cannot rule out the defect of measurement error caused by the vibration of the laser vibrometer itself caused by the vibration of the site

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