RZB型钻孔应变仪原位标定技术研究

摘要

前两代RZB型钻孔应变仪基于比率臂与传感器两个差动电容构成变压器电桥进行测量,一般采用手动电气标定方法实现仪器的现场原位标定.运用数字式电容位移传感器的第三代RZB型钻孔应变仪由于取消了比率臂,无法进行电气标定,因而无法满足地震行业仪器入网规范的要求.对于数字式电容位移传感器,选用REMA稀土合金材料研制新型微位移标定器,讨论了标定器的结构与初步的实验结果,并对导致标定误差的原因进行了分析.%Two previous generations of RZB borehole strainmeters carry the measurement based on the transformer bridge consisting of the ratio arms and two differential capacitences of the transducer. The in-situ calibration of the strainmeter was achieved by manual electric calibration methord. Because being unable to realize in-situ calibration without the ratio arms the third generation of RZB borehole strainmeters using digital capacitance displacement transducers is unqualified for the technical requirements of instruments in network for earthquake monitoring. For these digital capacitance displacement transducers the research on new micro displacement calibration technique choosing REMA Magnetostrictive Alloys is carried through recently, the configuration and primary experimental results of new regulator are introduced and causes resulting in calibration error are also discussed.