基于LabVIEW便携式地震检波器参数测试仪的开发与研制

Exploitation and study of the portable geophone parameters tester based on LabVIEW

便携式地震检波器参数测试仪是基于正弦扫频恒流激励方法,结合LabVIEW虚拟仪器开发平台而研制的一种新型地震检波器参数测试仪。该仪器可测量动圈式地震检波器的自然频率、灵敏度、阻尼系数、直流电阻、谐波失真、极性等诸多参数,操作方便,参数设置便捷,可实时显示并保存测量结果。与振动台激励法测量结果比较显示,该仪器具有测量精度高、频率与阻尼比参数测量范围宽、重复性好、体积小、重量轻等优点,特别适合于各种动圈式检波器在生产、维修和施工现场的特性参数的测量,具有很好的应用前景。

A new kind of portable tester of geophone parameters is developed based on the method of sine sweeping con- stant current exciting and the LabVIEW virtual instruments developing platform. The geophone characteristic pa- rameters, such as natural frequency, sensitivity, damp ratio, direct-current resistance, harmonic distortion, polarity and so on, are measured by the tester which is easy to operate and to set parameters, and can real-time display and conserve the measurement results. A comparison between the experimental results due to vibration exciting and test- er indicates the higher accuracy, wide measurement range of natural frequency and damp ratio, excellent repetitive- ness, small volume and lightness, which is specially suitable to calibrate characteristic parameters of various kinds of moving-coil geophones in production, maintenance and in site, and has a good application prospect.