Patent ID: 9194883
Filing Date: 2015-11-24
Classification: G01P,Y10T

Abstract:
1. An apparatus comprising: a physical component subjected to acceleration in operational use of the apparatus; and an accelerometer configured for supplying a signal representative of the acceleration; wherein the accelerometer comprises an electronic circuit with: a voltage amplifier, having a first input, a second input, and an output, the electronic circuit being free of a feedback connection between the first input and the output; multiple piezoelectric sensors that are substantially identical, each of the multiple piezoelectric sensors electrically connected to the first input without a switch therebetween such that constant electrical communication is maintained between the multiple piezoelectric sensors and the first input; and a bias resistor, connected between the first input and signal-ground; each respective one of the multiple piezoelectric sensors has a respective first electrode, a respective second electrode, and a respective main axis of main sensitivity; each respective one of the multiple piezoelectric sensors is mounted for generating a respective positive voltage at the respective first electrode and a respective negative voltage at the respective second electrode in response to the acceleration having a vector component of specific polarity parallel to the respective main axis; the multiple piezoelectric sensors are mounted with their main axes of main sensitivity aligned with each other; each respective one of the multiple piezoelectric sensors is electrically connected in a respective one of multiple current paths that are electrically connected in parallel between the first input and signal-ground; and each respective one of the multiple piezoelectric sensors has the respective first electrode electrically connected to the first input.