Taking Xi′an ground fissures as an example, the effectiveness of resistivity method in surveying ground fissures and the depth of detection of DC electrical method are discussed.
以西安地裂缝为例，探讨了电阻率法勘察地裂缝的应用效果及直流电阻率法的勘探深度问题。
2
Introduced are measuring circuits of voltage and current based on HCNR201, high-precision and high-linearity optocoupler, after surveying different kinds of current electrical isolators.
针对目前电气隔离器件状况，提出基于高精度线性光耦hcnr201的电压、电流测量电路。
3
It has been essential surveying equipment and a good helper in electrical and communicational department and mineral company.