In order to achieve long-term and real-time monitoring on target by vibrating wire sensor without commercial power

introduce a vibrating wire sensor frequency measurement system with high precision

low power consumption based on STM32L152 microprocessor. The hardware of the system includes sensor excitation

signal conditioning

data storage and power management modules. Using Rife and Quinn algorithm

it greatly reduces power consumption of the system by reducing excitation voltage of sensor and declining excitation time of sensor. Experimental results show that average working current of the system is 23. 2 m A

sleep current is 15 μA

relative error of frequency measurement is less than 0. 025 %

and it can meet the requirement of the engineering application in frequency measurement precision and power consumption.