Aiming at simultaneously achieving the measuring and locating function of lightning current

we developed a new lightning current sensor. We introduced the physical model

geometric parameters

and manufacturing process of the lightning current sensor

and developed the corresponding sensor coil based on lightning space magnetic field. The consistency between actual parameters and theoretical design parameters and the lightning current response characteristics of the sensor coil were verified by calibration experiments. The experimental results show that the coil parameters error in the acceptable range

the amplitude and frequency response is good

which can meet the demands of lightning current measurement. The output voltage of the coil is linearly proportional to the lightning current amplitude

and inversely proportional to the square of measuring distance

which is in agreement with the theory. The sensitivity of the sensor can be calibrated and the formula can be determined to demonstrate sensor output voltage

lightning current amplitude and measuring distance

providing a theoretical and experimental evidence for practical implementation.