Patent ID: 9400337
Filing Date: 2016-07-26
CPC Classification: G01P,G01V,H01L

Claim Text:
1. An omnidirectional beam accelerometer configured to measure low frequency waves, the omnidirectional beam accelerometer comprising: three beam acceleration sensors, wherein each beam acceleration sensor comprises a respective beam comprising a piezoelectric material and a respective mass operably coupled to the center of the respective beam, and each beam acceleration sensor has a ratio of a density of the respective mass [kg/m3] to the stiffness of the respective beam [N/m] of at least 4.5 ×10−5kg/Nm2; a housing, wherein each of the three beam acceleration sensors are operably coupled to the housing using knife clamps applied to each respective end of each of the beam acceleration sensors, and each of the three beam acceleration sensors is configured to measure acceleration in a respective orthogonal direction with a cross axis isolation of approximately 40 dB or better; and an interface circuit operably coupled to each of the three beam acceleration sensors, the interface circuit configured to interface the three beam acceleration sensors with an analog to digital (A/D) converter.