Evaluation of Vibration Transducer Resolution by Using Intrinsic Microseism

摘要：

　　The intrinsic microseism in a precision metrology laboratory of National Institute of Metrology is used to evaluate the resolution of vibration transducers.The precision metrology laboratory is located in the Changping experimental base of National Institute of Metrology.The intrinsic microseism has been measured since 2003.The frequency of the intrinsic microseism is about 3.2 Hz,and the velocity magnitude of the intrinsic microseism is about 5×10-8 m/s.The long term measure proved the frequency and magnitude of the intrinsic microseism is stable,and it can be used as a natural standard to evaluate the resolution of vibration transducers.The vibration transducers and a reference vibration transducer are located in a seismic block.The reference vibration transducer has enough vibration resolution to measure the intrinsic microseism.The vibration transducers and the reference vibration transducer measure and record the ambient vibration at the same time in a measurement period,e.g.15 minutes,2 hours or 24 hours.The recorded data are analyzed by FFT with average analysis in full-time process to gain the average spectrum.If the 3.2 Hz intrinsic microseism could be measured by the vibration transducers,the resolution of the vibration transducers will precede the magnitude of the 3.2 Hz intrinsic microseism which is measured by the reference vibration transducer.The signal noise ratio in the average spectrum can further affect the measure results.

关键词： vibration transducer resolution intrinsic microseism precision metrology laboratory

作者: Chenguang Cai Jiaping Xu Jingsheng Li

作者单位: National Institute of Metrology, No.18, Bei San Huan Dong Lu, Beijing, 100013, China Beijing Institute of Architecture Design, No.66, Nan Li Shi Lu, Beijing, 100045, China

会议类型: 国际会议

会议名称: 2012第八届精密工程测量和仪器仪表国际研讨会(ISPEMI2012)

会议地点: 成都

会议语种:英文

页码: 1-6

在线出版日期: 2012-08-08（万方平台首次上网日期，不代表论文的发表时间）