摘要
描述中国计量科学院在直线振动幅值和相位测量的理论研究和技术实现方面取得的最新进展。简要介绍了国家高、中、低频振动基(副基)准幅相特性测量装置的系统构建、测量原理和技术实现,以及装置达到的主要技术指标。提出振动基(副基)准优化提升中关键的技术创新点,如自主提出了改进的外差正弦逼近法和基于波峰波谷的外差时间间隔法,在压电高频(2kHz～50kHz)振动台上,首次在国内外实现了(1nm～500nm)振幅范围内的纳米级振动传感器灵敏度幅值和相移的测量。中国计量科学研究院(NIM)与德国物理技术研究院(PTB)在10Hz～10kHz范围内开展的标准加速度计灵敏度幅相特性国际双边比对验证了国家基准的测量不确定度。
The recent derelopment of study on primary standards for measuring magnitude and phase of translational vibration in NIM,China is described.The established measuring systems,the measurement principle of amplitude and phase calibration for the three primary vibration standards of low frequency(LF),mediate frequency(MF)and high frequency(HF)and the main specifications are simply introduced.Some technological innovation points are given,such as,on the piezoelectric shaker with frequency range of 2kHz-50kHz,the magnitude and phase shift of accelerometer sensitivity can be measured with displacement amplitude range of 1 nm to 500 nm for the first time,using the modified heterodyne sine-approximation method and the modified heterodyne time interval method based on peak and valley of interference signal.Their measurement uncertainties are verified by bilateral comparison of the magnitude and phase shift of the complex sensitivity of the standard accelerometer between three primary vibration standards of NIM and vibration standards of PTB in Germany from 10 Hz to 10 kHz.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第7期54-58,共5页
Journal of Vibration and Shock
基金
国家质量监督检验检疫总局基金项目
关键词
计量学
加速度计的复灵敏度
零差激光干涉仪
外差激光干涉仪
正弦逼近法
metrology,complex sensitivity of accelerometer,homodyne interferometer,heterodyne interferometer,sine-approximation method
