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DD—1微震仪常用的测试方法是分段标定法。即先测出拾震器工作线圈的电流常数P_(12),再由 P_(12)推算出中肯电阻α_(12),电压灵敏度 S_(12)等其它参数;另外再测出放大器记录笔的电压灵敏度 S_(23),得出整机放大倍数:F_(T)=2πfU_1S_(12)β_(12)S_(23)式中 U_1为摆幅频特性,β_(12)为工作线圈至放大器之间的耦合系数。由于分段标定所测定的参数比较多,这样在放大倍数计算中会使误差增大,(约15%),而一次标定法较之分段标定法可减少一些中间过程的测试和计算,除了可减小标定工作量以外,还可以进一步提高测
DD-1 microseism commonly used test method is segmented calibration method. That is, the current constant P 12 of the working coil of the pickup is first measured, and then the other parameters such as the medium resistance α 12 and the voltage sensitivity S 12 are calculated by P 12. In addition, Voltage sensitivity S_ (23), the whole machine magnification is obtained: F_ (T) = 2πfU_1S_ (12) β_ (12) S_ (23) Where U_1 is the swing frequency characteristic, β_ (12) is the working coil to amplifier Between the coupling coefficient. As the number of parameters measured by the segmented calibration, so that the magnification will make the error increase (about 15%), and a calibration method than the sub-calibration method can reduce some of the intermediate process of testing and calculation, in addition to Can reduce the calibration workload, but also can further improve the measurement