In view of the demand of wireless temperature technology for power equipment

a kind of wireless temperature online monitoring system based on a new type of magneto electric power generation device is designed in this paper. The system uses the stray magnetic field around the power system to power the entire wireless monitoring system

and designs a new piezoelectric friction-coupled cantilever beam structure to improve the efficiency of magnetic field energy collection. At the same time

the temperature measurement module uses low-pass filtering to improve the collection sensitivity. The low main frequency working mode and timing wake-up function are used to reduce the energy consumption of signal processing and transmission. It has both low-power temperature acquisition function and concurrently electrically isolated data transmission capability to assure stable and reliable operation of the whole set of equipment. It is known by the experiments that the power module can generate a peak-to-peak open-circuit voltage of 160 V under an alternating magnetic field of 4 Oe

50 Hz and the stable voltage at 3.3 V is output after rectification of a short-circuit current at 14 μA. The wireless temperature measurement device can send and receive temperature data every 5 s under the power supply.