MICRO ELECTRIC FIELD SENSOR BASED ON LUMINOUS FLUX SENSING DEFORMATION

Electric power sensing devices and networks have become one of the most important infrastructures of smart grids. As a basic component of smart grids, there is an urgent need to develop non-contact, wide-range, wide-band and low-cost miniature electric field sensors. This paper proposes a micro electric field sensor based on luminous flux sensing device deformation. The mathematical theory and finite element simulation software are used to predict and evaluate the sensing performance. The influence of each parameter on the performance of the device is analyzed as well. Experiment results show that the sensor, can achieve a stably electric field measure at a range of 19 kV/m - 10.62 MV/m, and has a frequency bandwidth of 71 Hz with 3 dB attenuation. Besides, it has the advantages of high sensitivity, high measurement accuracy, low cost and very limited interference from stray capacitance. It can realize the measurement of DC and AC power frequency electric fields.