Piezoelectric vibrator and acceleration sensor using the same
First Claim
1. An acceleration sensor comprising:
- a plurality of plate-shaped vibrating bodies connected with each other so that surfaces of said vibrating bodies are crossed on one central axis; and
piezoelectric elements formed on the surfaces of said plurality of plate-shaped vibrating bodies, whereinsaid vibrating bodies connected with each other vibrate in such a manner that longitudinal expansion and contraction take place inversely at both sides of center portions of said vibrating bodies by applying a driving signal to said piezoelectric elements.
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Abstract
Four piezoelectric elements are formed on both surfaces of a plate-shaped vibrating body. Two piezoelectric elements are formed to be opposite to each other at one side of the longitudinal center portion of the vibrating body. Another two piezoelectric elements are formed to be opposite to each other at the other side of the longitudinal center portion of the vibrating body. By applying a signal to the piezoelectric elements, the vibrating body is vibrated in a longitudinal direction. In this time, the vibrating body is vibrated in such a manner that longitudinal expansion and contraction take place simultaneously in a part of the vibrating body. By using such vibration, both longitudinal ends are not displaced in spite of the vibration of the vibrating body. The vibrating body can be used as an acceleration sensor measuring the output voltages from the piezoelectric elements of the vibrating body.
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Citations
25 Claims
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1. An acceleration sensor comprising:
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a plurality of plate-shaped vibrating bodies connected with each other so that surfaces of said vibrating bodies are crossed on one central axis; and piezoelectric elements formed on the surfaces of said plurality of plate-shaped vibrating bodies, wherein said vibrating bodies connected with each other vibrate in such a manner that longitudinal expansion and contraction take place inversely at both sides of center portions of said vibrating bodies by applying a driving signal to said piezoelectric elements. - 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, 24, 25)
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Specification