Piezoelectric vibration sensor
First Claim
1. A sensor unit for picking up mechanical vibrations, sounds, and ultrasound from a surface of a body, comprising:
- a piezoelectric foil strip defining a sensor element, said piezoelectric strip having signal wires attached thereto for transmitting electrical signals representing the vibrations, sounds, or ultrasound to be picked up;
flat support parts for holding only opposite ends of said piezoelectric strip; and
an engagement strip for engaging the surface of the body to receive vibrations therefrom, and for propagating the vibrations to said piezoelectric strip, said engagement strip being held in said support parts so as to extend in a curved manner along said piezoelectric strip and define a space between said piezoelectric strip and said engagement strip.
1 Assignment
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Accused Products
Abstract
A sensor unit for picking up mechanical vibrations, sound and ultrasound has at least one piezoelectric foil strip (piezo strip) as a sensor element. The piezo strip has signal wires attached thereto for transporting out electrical signals representing vibration, sound or ultrasound that have been picked up. The piezo strip is, at two opposite ends, attached to flat support parts, and at least one engagement strip of for instance plastic material is attached in the same support parts to extend in curved-out fashion along the piezo strip, thereby to provide at least one space between the strips. Several sensor units can be mounted together in a frame to constitute a sheet with a sensor matrix.
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Citations
20 Claims
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1. A sensor unit for picking up mechanical vibrations, sounds, and ultrasound from a surface of a body, comprising:
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a piezoelectric foil strip defining a sensor element, said piezoelectric strip having signal wires attached thereto for transmitting electrical signals representing the vibrations, sounds, or ultrasound to be picked up; flat support parts for holding only opposite ends of said piezoelectric strip; and an engagement strip for engaging the surface of the body to receive vibrations therefrom, and for propagating the vibrations to said piezoelectric strip, said engagement strip being held in said support parts so as to extend in a curved manner along said piezoelectric strip and define a space between said piezoelectric strip and said engagement strip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification