压电加速度计灵敏度幅值的测得值不确定分析及评定  

The Uncertainty Analysis and Evaluation of Measurement Results of Piezoelectric Accelerometer Sensitivity Amplitude

作　　者：贾鹏 毛九明 朱未冽 宋先伟 JIA Peng;MAO Jiuming;ZHU Weilie;SONG Xianwei

机构地区：[1]成都市计量检定测试院 [2]简阳市计量测试所 [3]成都市计量监督管理局计量处

出　　处：《计量与测试技术》2022年第7期111-113,116,共4页Metrology & Measurement Technique

摘　　要：压电加速度计利用压电敏感元件的正压电效应工作,将被测加速度计与参考级加速度计采用同轴安装的方式固定在中频标准振动台中心点上,根据JJG233-2008《压电加速度计检定规程》进行检定。采用的计量标准为比较法中频振动标准装置,该装置由动态信号分析仪、中频标准振动台、参考级压电加速度计等组成。通过分析动态信号分析仪、参考级压电加速度计、标准振动台等各项因素引入的不确定度分量,从而得到压电加速度计在参考点160Hz和通频带(20~2000)Hz灵敏度幅值测得值的不确定度。Piezoelectric accelerometers work by using the positive piezoelectric effect of piezoelectric sensors.The measured accelerometer and the standard piezoelectric accelerometer are fixed on the center point of the medium frequency standard vibrator coaxially,and verified according to JJG 233-2008"Verification Regulation for Piezoelectric Accelerometer".The measurement standard is medium frequency vibration standard device using comparative method.This standard device consists of dynamic signal analyzer,medium frequency standard vibrator,standard piezoelectric accelerometer and so on.The uncertainty of measured values of piezoelectric accelerometer sensitivity amplitude at the reference point of 160 Hz and passband(20~2000)Hz can be obtained by analyzing the uncertainty components introduced by dynamic signal analyzer,standard piezoelectric accelerometer,medium frequency standard vibrator and other factors.

关 键 词：压电加速度计 灵敏度幅值 测得值的不确定度 中频标准振动台 动态信号分析仪 

分 类 号：TH824[机械工程—仪器科学与技术]