MEMS Acceleration Sensor Vibration Detection System with LoRa Communication

The vibration phenomenon of mechanical equipment will cause a variety of effects. Because the vibration of equipment or components is its main operation index and determines its operation stability and service life, it is of great engineering significance to monitor and analyze its vibration degree. This paper introduces a vibration signal detection technology based on MEMS acceleration sensor. Firstly, the single-chip microcomputer STM32F103C8T6 is used as the main controller, and then the multi range MMA7361 acceleration sensor is used as the measurement sensor of vibration signal. When the acceleration vibration is more intense, the corresponding acceleration is also large and the change frequency is very fast. At this time, the singlechip microcomputer ADC is used to collect the output value of the sensor. After collecting multiple groups of data, it is analyzed in time domain and frequency domain, Separate the waveforms of each frequency band, and then send them to the host computer in LoRa communication mode for further analysis and processing. Through the detection test of each frequency band signal of 1g vibration frequency, the maximum error of acceleration value is no more than 5%, and the frequency error is no more than 1%. It shows that the system can effectively detect the change of vibration signal and facilitate the accurate troubleshooting of equipment faults.