力平衡式加速度计仪器响应误差的校正方法
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摘要
本文通过对数字强震仪系统使用的力平衡加速度计的仪器响应误差进行分析,提出了一个校正仪器响应失真的处理方法(微分-微分方法),即对未校正记录做低通滤波后运用近似理想微分器做两次微分得到校正加速度记录。针对大亚湾核电站地震仪表系统(K IS)给出了仪器校正示例,并编制了相应计算软件。该方法适用于我国强震动台网数字强震仪获取的加速度记录的仪器响应误差校正处理。
The analysis of instrument response errors for force-balance accelerometer of digital accelerograph system is carried out in this paper.A method for correcting instrument response errors(the differential-differential method) has been put forward,i.e.the un-correction acceleration data are treated by low-pass filtering.They are differentiated twice with approximate ideal differentiators to obtain the corrected accelerogram.In allusion to the earthquake instrument system(KIS) of Daya Bay nuclear power station,the instrument response correction demonstration is given,and the corresponding compute processing softwares are compiled.The method is applicable for instrument response correction processing of accelerogram recorded by digital accelerograph of China strong motion network.
The analysis of instrument response errors for force-balance accelerometer of digital accelerograph system is carried out in this paper.A method for correcting instrument response errors(the differential-differential method) has been put forward,i.e.the un-correction acceleration data are treated by low-pass filtering.They are differentiated twice with approximate ideal differentiators to obtain the corrected accelerogram.In allusion to the earthquake instrument system(KIS) of Daya Bay nuclear power station,the instrument response correction demonstration is given,and the corresponding compute processing softwares are compiled.The method is applicable for instrument response correction processing of accelerogram recorded by digital accelerograph of China strong motion network.
引文
[1]Novikova E I,TrifunacM D.D igital instrument response correction for force-balance accelerometer[J].Earthquake Spectra,199,28(3):429~442.
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[4]Lee V W.D igitization and data processing of strongmotion earthquake accelerogram s,Proceed ings of the International Conference on Advances andNew Challenges in Earthquake Engineering Research[C].Hong Kong Volum e,2002.99~114.
[5]Yu Haiying.Strong motion database and analysis m ethod in main land Ch ina,Proceed ings of the International Conference on Advances and NewChallenges in Earthquake Engineering Research[C].Hong Kong Volum e,2002.187~194.
[6]于海英.强震记录标准常规处理软件研究报告[R].国家强震台网中心建设技术报告附件一,2001.
[7]于海英.强震加速度记录的数字化误差分析及消除误差的方法和软件[J].仪器仪表学报,2005,26(8):748~751.
[2]TR IFUNAC M D.A Note on correction of strong motion accelerogram s for instrum ent response[J].Bu ll.Seism.Soc.Am.,1972,62:401~409.
[3]X ie L i li.The main features O f data processing procedure for strong motion records in Ch ina[J].Physics of the Earth And P lanetary Interiors,E lsevier Science Pub lishers B.V.,Am sterdam-Printed In the Netherlands.1985,38:134~143.
[4]Lee V W.D igitization and data processing of strongmotion earthquake accelerogram s,Proceed ings of the International Conference on Advances andNew Challenges in Earthquake Engineering Research[C].Hong Kong Volum e,2002.99~114.
[5]Yu Haiying.Strong motion database and analysis m ethod in main land Ch ina,Proceed ings of the International Conference on Advances and NewChallenges in Earthquake Engineering Research[C].Hong Kong Volum e,2002.187~194.
[6]于海英.强震记录标准常规处理软件研究报告[R].国家强震台网中心建设技术报告附件一,2001.
[7]于海英.强震加速度记录的数字化误差分析及消除误差的方法和软件[J].仪器仪表学报,2005,26(8):748~751.
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