Study on Fast Frequency-sweep Method for Vibrating Wire Sensor

In order to measure the resonant frequency of the vibrating wire sensor quickly and accurately, a fast frequency-sweep method based on STM32 microcontroller is designed. The first frequency-sweep stimulation is used to obtain the resonance frequency approximately, and then the second stimulation is used to obtain the accurate frequency. Different frequency measurement methods are adopted in the stimulations, which realize the rapidity of the first frequency-sweep stimulation and the accuracy of the second stimulation. With the help of the high-frequency clock of the STM32 microcontroller, it can reduce the system error and ensure the accuracy of the reading results.