Flextensional vibration sensor
First Claim
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1. A vibration sensing device comprising:
- a hollow flextensional body having a cross section that has a major and a minor axis, said flextensional body being operable to deform in response to received vibrational energy and thereby produce a variation in a predetermined property exhibited by said body in the direction of one of said major or minor axis, said flextensional body being shaped such that said variation in said predetermined property is amplified in the direction of the other of said major or minor axis;
a mass mounted on said flextensional body such that vibrational energy received along said minor axis causes acceleration of the mass, anda sensor coupled with the flextensional body along said major axis and operable to detect the amplified variation indicative of received vibrational energy.
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Abstract
A vibration sensing device, package and system and a method of manufacturing a vibration sensing device are disclosed. The vibration sensing device comprises a body whose geometry is such that it exhibits flextensional properties.
28 Citations
24 Claims
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1. A vibration sensing device comprising:
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a hollow flextensional body having a cross section that has a major and a minor axis, said flextensional body being operable to deform in response to received vibrational energy and thereby produce a variation in a predetermined property exhibited by said body in the direction of one of said major or minor axis, said flextensional body being shaped such that said variation in said predetermined property is amplified in the direction of the other of said major or minor axis; a mass mounted on said flextensional body such that vibrational energy received along said minor axis causes acceleration of the mass, and a sensor coupled with the flextensional body along said major axis and operable to detect the amplified variation indicative of received vibrational energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of detecting vibrations comprising:
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coupling a sensor to a hollow flextensional body having a cross section that has a major and a minor axis said sensor coupled along said major axis, said flextensional body being operable to deform in response to received vibrational energy and thereby produce a variation in a predetermined property exhibited by said flextensional body in the direction of one of said major or minor axis, said flextensional body being shaped such that said variation in a predetermined property is amplified in the direction of the other of said major or minor axis; coupling a mass to said flextensional body such that vibrational energy received along said minor axis causes acceleration of the mass; placing said flextensional body in an environment where vibrational energy is to be detected; and detecting the amplified variation indicative of received vibrational energy with said sensor.
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Specification