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Low frequency performance calibration platform for accelerometer

An accelerometer and calibration platform technology, applied in the testing/calibration of velocity/acceleration/shock measurement equipment, velocity/acceleration/shock measurement, measurement devices, etc., can solve the problem of large harmonic distortion of the output waveform of the vibration table

Inactive Publication Date: 2012-07-04
FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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  • Abstract
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Problems solved by technology

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a low-frequency performance calibration platform for accelerometers, which solves the problem of large harmonic distortion of the output waveform of the vibration table

Method used

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  • Low frequency performance calibration platform for accelerometer
  • Low frequency performance calibration platform for accelerometer

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Embodiment Construction

[0016] see figure 1 , The accelerometer low-frequency performance calibration platform of the present invention includes a mechanical platform body, which is mainly composed of a stable speed platform 1 and a servo platform 2. The working surface of the speed-stabilizing table 1 is parallel to the ground, and the rotating shaft 3 of the speed-stabilizing table is perpendicular to the ground. There can be two or more follow-up tables on the table of the speed-stabilizing table, and the following tables are symmetrically installed on the circular table of the speed-stabilizing table. . The magnitude of the dynamic acceleration received by the accelerometer fixed on the table of the moving table is determined by the angular rate ω of the steady speed table 1 and the working radius, while the frequency of the dynamic acceleration is determined by the angular velocity ω of the servo 2 It is determined that the magnitude and frequency of dynamic acceleration are independent of eac...

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Abstract

The invention discloses a low frequency performance calibration platform for an accelerometer, which comprises a mechanical platform body mainly composed of a speed-stabilizing platform and a driven platform. A counter top of the speed-stabilizing platform is parallel to the ground, a rotating shaft of the speed-stabilizing platform is perpendicular to the ground, the driven platform is installed on a platform face of the speed-stabilizing platform, the accelerometer is installed on a platform face of the driven platform, and an input shaft of the accelerometer is parallel to the horizontal surface. The low frequency performance calibration platform for the accelerometer is based on an acceleration simulation rotary table, acceleration amplitude exerted on the accelerometer is determined by angular speed and work radius of the speed stabilizing platform of the rotary table, the driven platform of the rotary platform determines the frequency of acceleration, and calibration of super-low frequency performance of the accelerometer is achieved by controlling low speed rotation of the driven platform.

Description

technical field [0001] The invention relates to the calibration of accelerometers, in particular to an accelerometer low-frequency performance calibration platform. Background technique [0002] In the development, production and use of the accelerometer, it is necessary to calibrate the dynamic performance of the accelerometer. In the application of aerospace technology, attitude control of artificial satellites, underwater acoustic detection, and earthquake prediction, accelerometers need to detect ultra-low frequency signals, and the detection frequency has reached 0.001Hz or even lower. Therefore, it is necessary to calibrate the low-frequency performance of accelerometers used in the above-mentioned fields. [0003] At present, the direct calibration of the low-frequency performance of the accelerometer usually adopts the vibration table calibration method, which is calibrated by the excitation method of the sinusoidal motion generated by the vibration table. First, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00
Inventor 黄钦文
Owner FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
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