Piezo electric vs MEMS vibration monitoring
Vibration is a form of imperfection. Early detection of vibration or monitoring of such anomaly is one of the key ways to reducing downtime in an industry, ergo, increasing its efficiency. Vibration sensors come in to play in such scenarios. Frequency domain analysis of a vibration sensor output from a machine helps one understand its present condition. This data can be accumulated and aggregated for anomaly detection in the functioning of the machine.
Piezo electric accelerometers were initially used for the detection of vibration but MEMS accelerometers are proving to be more effective in light of the 4th industrial revolution also nicknamed Industry 4.0 practices, which has Industrial IOT as its backbone.
Vibration sensors – Piezo electric vs MEMS
MEMS based accelerometers triumph over the conventional piezo electric accelerometers by virtue of its self testing capability and their ability to provide real time analysis of machine data for visualisation purposes. Even though an MEMS accelerometer also requires FFT analysis of data, the bulk of hardware is reduced in an MEMS based accelerometer.
Piezo-based sensor outputs are weak in a noisy environment hence increasing complexity in extracting usable outputs from it in such scenarios, whereas MEMS sensors come packed with more profound features and tight performance specifications in tiny packages. Equipment vibration profile is limited in piezo electric based sensors as they are usually single axis implementations.
Tri-axial MEMS accelerometers will truly prove to be the forerunners in the vibration sensing segment of Industry 4.0 in the coming years not only because of their low power micro-controller pairing capabilities but also because of their real-time FFT analytic ability that aid in detecting trends that would otherwise prove to hinder operations in the long run.
Ripples IOT offers MEMS sensor based condition monitoring solutions for smart factories. Read condition monitoring FAQ