Vibration sensor
First Claim
1. A device for detecting motion or vibration comprising a motion/vibration sensor having a first component that generates a signal based on flexing of such first component, the first component having a central portion and a peripheral portion, and a second component supporting the first component at the central portion for transmitting the motion or vibration to be detected to the central portion, the peripheral portion being unsupported so that it is free to move in opposite directions from a rest position by flexing of the first component.
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Accused Products
Abstract
A circular layer of piezoelectric material is supported on a larger substrate disc of a thin somewhat flexible material. Flexing of the disc generates an electrical signal. The substrate disc is weighted at its periphery, and the central portion of the disc is supported on a member for transferring motion or vibration that it is desired to detect. In the preferred embodiment the center support is provided by a pair of bosses projecting into the otherwise hollow interior of a two-part casing that encloses the disc-weight assembly. The weights impart a peripheral inertia that makes the composite unit sensitive to minute vibrations.
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Citations
19 Claims
- 1. A device for detecting motion or vibration comprising a motion/vibration sensor having a first component that generates a signal based on flexing of such first component, the first component having a central portion and a peripheral portion, and a second component supporting the first component at the central portion for transmitting the motion or vibration to be detected to the central portion, the peripheral portion being unsupported so that it is free to move in opposite directions from a rest position by flexing of the first component.
Specification