Vibration Measurement System with Accelerometer Sensor Based on ARM

These Vibration amplitude may be measured as a displacement, a velocity, or acceleration. Vibration amplitude measurements may either be relative, or absolute. The basic scheme of vibration measurement is outlined first. Descriptions are given of transducers devices which transform physical variables into equivalent electrical signals and of vibration pickups. The increasing demands of higher productivity and economical design lead to higher operating speeds of machinery and efficient use of materials through lightweight structures. How we can measure vibration or earthquake signal of any device is describe in this system. These trends make the occurrence of resonant conditions more frequent during the operation of machinery and reduce the reliability of the system. Hence the periodic measurement of vibration characteristics of machinery and structures becomes essential to ensure adequate safety margins. Accelerometers develop a voltage from a piezoelectric crystal that has a mass mounted upon it. When the mass fixed to the crystal vibrates from the motion of the device upon which the sensor is attached, the crystal generates a voltage proportional to the force applied by the mass as it vibrates with the machinery. While no external excitation is required for the sensor to produce its voltage signal, the signal is small (self- generated) and requires a preamplifier.