Compensation of the offset in numerical integration of a D-dot sensor measurement

Based on the physical principle of D-dot electric field sensors, integration is indispensable to recover the measured electric field. As integrators are not applicable under certain conditions and the offset in numerical integration is vital to the pulse measurement results, it is necessary to compensate the offset in software integration of a D-dot electric sensor measurement. This paper presented a fast and adaptive method to solve this issue. In order to pick up the offset, a delayed trigger is adopted. And the detection is conducted on the integrated waveform instead of the measured raw data. By linear fitting approach, the offset is mathematically modeled and then removed from the original shape. A detailed example is given to illustrate the data process. From the corrected result it can be seen that the presented method is highly beneficial to accurate pulse measurements.