For the desire of data acquisition of vibrating wire sensors in security detection of bridge

design a measurement system of multi-channel frequency data acquisition. Aiming at problem of weak output signal of vibrating wire sensors and easy to be interfered which result in precision decrease

hardware circuit which efficiently suppress interference is designed and software uses STM32 processor as the core

frequency measuring scheme is put forward. The measurement system can perform the measurement of vibrating wire sensors of 8 channels in 24 s

the measurement accuracy rate is as high as 99. 9 %. The experimental results show that the system has advantages of high working stability

simple hardware circuit

strong anti-interference capability.