Digital closed-loop system of high precision vibration sensor demands for high sampling precision and real-time performance. In order to solve problem of constraints of sampling rate and precision in measurement

a two-channel asynchronous sampling method is proposed

adaptive Kalman filtering is carried out in high speed channel and low speed channel data is used for realtime precision compensation. Considering sampling rate

high precision and real-time requirements of digital closed-loop system

two-channel asynchronous measuring circuit and asynchronous data fusion algorithm are designed in detail. Simulation experiment show that precision of this method is enhanced than traditional method

and real-time performance is prior to the traditional sampling rate conversion method.