Development of the charge amplifier for piezoelectric accelerometer sensors

Piezoelectric accelerometer sensors which have many advantageous features are widely used in the field of vibration measurement. However, they usually require an amplifier to convert the small charge output to a stable voltage output. A newly developed charge amplifier employing hybrid technics for reducing the weight and size and improving the reliability is described. These charge amplifiers had no failures during the time they were used in the Engine Monitoring System.