A kind of design scheme of mechanical vibration detection system is introduced.This system is centered C8051F310 as control core.Through linear Hall sensor

micro vibration signal is transformed into voltage signal.It adopts triple level band-pass filtering and amplification circuit to process signal and sent to micro controller.Collect data on site are real-time displayed and processed on monitoring PC through RS—485.Thus

it can get detail information of mechanical vibration.The experimental results show that the system has high precision vibration amplitude and frequency error is small and desired function is achieved.