Low frequency angle vibration table

An angular vibration table, low frequency technology, used in measuring devices, instruments, speed/acceleration/shock measurement, etc., can solve the problems of narrow frequency response range, low measurement accuracy and resolution, and achieve high motion performance and signal quality. Good, smooth running effect

Inactive Publication Date: 2007-05-02
BEIJING CHANGCHENG METERING TEST TECH INST NO 1 GRP CO CHINA AVIATION IND
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Problems solved by technology

The measurement accuracy and resolution are low, and the frequency response range is narrow, which cannot meet the needs

Method used

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  • Low frequency angle vibration table
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Embodiment Construction

[0034] As shown in Figures 1 and 2, the generation of low-frequency angular vibration table can be traced back to the International System of Units (SI) standard angular displacement, angular velocity and angular acceleration, and the angular displacement sensor, angular velocity sensor (gyroscope, tachometer, etc.) Accelerometers are calibrated for amplitude-frequency and phase-frequency characteristics. The air-floating shaft system is adopted, and due to the homogenization effect produced by the air film, not only can high rotation accuracy be obtained, but also the friction is small and the operation is stable. The low-frequency angle vibration table mainly includes a mechanical vibration table 1, a grating 2 to be calibrated, a sensor 3, a control system 4, a reading head 5, a grating signal conditioner 6, a data acquisition system 7, and a data processing system 8; the control system controls the mechanical vibration table according to the The characteristics of the cali...

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Abstract

An angular vibration table of low frequency is prepared as using control system to control mechanical vibration table to generate sine vibration according to property of calibrated transducer, sending one path of grating output signal to control system for carrying out closed loop control and another path to data collection system being used to simultaneously collect output signals of grating and calibrated transducer, obtaining relation curve of time and movement amount after said signals are processed by data processing unit then calculating out phase-shift and magnitude sensitivity of calibrated transducer.

Description

technical field [0001] The invention relates to a low-frequency angular vibrating table used for calibrating a motion parameter sensor. Background technique [0002] The motion parameter sensor needs to be calibrated before measurement, and the linear vibration standard and angular vibration standard are used to calibrate the above sensor. There are mainly two methods for tracing the motion parameters in calibration. One is the absolute method, which uses laser interferometry to trace the motion parameters to time, length or angle, with high accuracy; the other is the comparative method, which uses calibrated The standard sensor measures the motion value, which has the advantages of low cost and simple method, but the accuracy is low. The specific method can refer to the article "Measurement (Measurement) 2000 Volume 28" "Laser Interferometry Vibration and Shock Measurement Traceability" (H.-J.v.Martens, A.Tubner, W.Wabinski, A.Link, H.-J. Schlaak, "Traceability of vibrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00G01P21/00
Inventor 张力彭军何群薛景峰
Owner BEIJING CHANGCHENG METERING TEST TECH INST NO 1 GRP CO CHINA AVIATION IND
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