Design of Composite Current Frequency Sensor

Based on the actual needs of many engineering applications, a Hall current sensor capable of simultaneously measuring current data and frequency is designed. The sensor uses the single chip STM32F373CT6 to connect multiple functional modules together and combines Fourier transform to complete the acquisition, processing and output of the measured signal. The system hardware block diagram and algorithm flow chart are given, combined with the system. The design scheme explains the main functional modules. The simulation and actual measurement show the rationality and feasibility of the sensor. It has the ability to simultaneously measure current and frequency, high integration, high measurement accuracy and wide measurement range.