Piezoelectric sensors

摘要

The vibration and shock sensitivity of a piezoelectric sensor is reduced by connecting the electrodes of a primary sensor 11 in voltage opposition to the electrodes of a compensating secondary sensor 12 having a substantially similar piezoelectric element mounted on a common substrate with the primary current sensor. The piezoelectric element of the secondary sensor is loaded with a distributed mass approximating the distributed mass effectively loading the piezoelectric element of the primary sensor. The primary sensor 11 senses current I in conductors 14a, 14b in the arrangement shown.