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Method for testing vibration acceleration of sensor at 100g or above

A technology of vibration acceleration and sensors, applied in instruments, measuring devices, and measuring ultrasonic/sonic/infrasonic waves, etc.

Inactive Publication Date: 2013-06-05
CHENGDU KAITIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The task of the present invention is to propose an adjustable vibration frequency, which can realize the large g value vibration of the steady state of the test vibration sensor, and is used to test the vibration acceleration of the sensor at 100g and above, so as to overcome the defects of the traditional impact test method

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  • Method for testing vibration acceleration of sensor at 100g or above
  • Method for testing vibration acceleration of sensor at 100g or above
  • Method for testing vibration acceleration of sensor at 100g or above

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Embodiment Construction

[0014] refer to figure 1 . In the best embodiment provided below, the cantilever beam and the mass block component unit are composed of a metal-processed cantilever beam 1 and a sensor under test 2, wherein the cantilever beam is made of metal, and the mass block component unit is the sensor under test .

[0015] The cantilever beam is rigidly connected to the vibrating table, and the mass block unit is fixedly connected to the free end of the cantilever beam 1 to form a vibrating table excitation vibration amplification mechanism (hereinafter referred to as vibration excitation device). The basic principle of this mechanism is to apply a vibration acceleration a to the cantilever beam at the natural frequency point frequency of a certain cantilever beam, and obtain a maximum acceleration a' of about 30 times a after resonance is generated. At the application end of the vibration table, use the vibration table to apply a vibration acceleration of less than 100g. Under the re...

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Abstract

The invention provides a method used for testing vibration acceleration of a sensor at 100g or above. The method can broaden the exploration of the limit of vibration in engineering to about 500g and adjust the resonant frequency through changes of material and length of a cantilever to achieve adjustment of test frequency. The method is achieved through the technical scheme that the cantilever is formed by machining of metal material, a test sensor is used as a mass block forming unit, the cantilever and the mass block forming unit are connected on a vibration platform rigidly, then the vibration platform is used for inflicting a vibration acceleration smaller than 100g at one end of the vibration platform to enable the test sensor which serves as a test point of reference acceleration to reach an acceleration over 100g at the resonant frequency, and when the frequency inflicted on the vibration platform is close to or equal to inherent frequencies of the cantilever and the mass block forming unit, the mass block forming unit generates resonance, and the acceleration of the vibration platform can be amplified by a number of times at the point.

Description

technical field [0001] The invention relates to a vibration testing method, in particular, the invention relates to a large vibration testing method for testing a sensor at a vibration acceleration of 100g and above. Background technique [0002] At present, the maximum no-load acceleration of the largest vibration table in the world generally cannot exceed 150g, and it is often lower than 100g after adding the load. Therefore, the existing technology is used to achieve a long-term, high-amplitude steady-state vibration with a frequency that can be set and above 100g. Testing is very difficult. At the current stage of engineering, the large vibration of the sensor is usually achieved by giving an instantaneous impact acceleration and obtaining the so-called half-sine wave. The defect of this method is that it is difficult to obtain an ideal shock waveform, and only a relatively high (above 1kHz) vibration frequency can be obtained. However, this impact method is unreliable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 包绍明余快
Owner CHENGDU KAITIAN ELECTRONICS
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