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| Application of the Quartz-flexure Accelerometer to the Development of Ultra-low Frequency Vibration National Primary Standard Device |
| YU Mei1,LIU Ai-dong1,HE Wen2,YANG Li-feng1,HU Hong-bo1,ZUO Ai-bin1,MA Ming-de1 |
1.National Institute of Metrology, Beijing 100013, China
2.Zhejiang University, Hangzhou Zhejiang 310027, China |
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Abstract The improved quartz-flexure accelerometer with independent developed condition-amplifier is adopted as the vibration pickup sensor in ultra-low frequency vibration feedback control, and as the standard implement for performance measuring of ultra-low frequency vibration primary standard device. The distortion of vibrator output acceleration waveform is decreased effectively, and the effect of environmental vibration is suppressed to some extent. The acceleration distortion is less than 1% above 0.002 Hz.It solves the measurement means problem caused by without measuring sensor below 1Hz.The stability and repeatability meet requirements of standard devices.It is considered that it can be used as the standard implement of calibration and the check standard for low frequency or ultra-low frequency vibration national primary standard and standard devices.
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2011, Vol. 32 
