Study On Rogowshi Coil For Research On Detecection Technology Of Pulse Current

Pulse current in many domains such as medical, defense, industrial field, has been widely used, so the pulse current detection has been a hot research topic in recent years. Pulse current detection has a lot of methods that mainly include the diverter, hall sensor test and Rogowski coil test. Rogowski coil test in terms of impulse current test has security measurement and measurement precision higher advantages, so the study of pulse current technology by Rogowski coil has good application prospect.The output of Rogowski coil is the differential form of signal to restore the signal after integration,so the subsequent integrator is crucial in pulse current detection research. Common integrator includes analog integrator and digital integrator,because analog integrator drifts and easily has integral saturation,it can not calculate the integral for a long time and digital integrator can flexibly solve the above problems. So this paper adopts the method of digital integral to reduction of differential signals,and the digital integration after practical application, the scene debugging difficult problem and small signal transmission distance problem of simulated integral will have been solved.Dynamic characteristics is studied in this paper according to the structural parameters of the research of Rogowski coil, current carrying conductor eccentricity influence on pulse current detection is analyzed on the base of the working principle of the coil of Rogowski,that lays a foundation for subsequent measurements.Thesis mainly studies the digital integral algorithm that included comparison of different integral algorithm,then selecting the best integral algorithm to meet the precision and efficiency of integral; In view of the limited storage spac e, digital integral collection can’t adapt to all frequency detection problems, integral algorithm designed for any frequency signal, in keeping with the reduction of signal accuracy; Using IIR filter solves the problem of integral saturation that caused b y low frequency dc.In this paper, the pulse current detection system for the overall design, includes hardware design, software design process and PC LABVIEW interface design which display detected waveform parameters and detected waveform,it is revealed in the experiment this design can meet the actual situation of the application.