Results: the results showed that the measuring electrode, skin-electrode, contacting impedance, and stimulating frequency all influenced the measured signal.

The hardware of the system mainly consists of a ZHJ-1B current sensor, a self-made resistance strain force sensor , the device for measuring electrode voltage and a NI-DAQ 6062E data acquisition card.

The simulated electrode method is analyst and a method for ~measuring impulse voltage distribution of transformer windings without core is built.