EP0100501A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vibration sensor
Assignee: Panasonic Holdings Corp
•
Filing: 1983-07-23
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Granted: —
•
Expires: 2003-07-23
Abstract
Abstract A vibration sensor (K) including a piezoelectric vibrator (3) constituted by a pair of plate-like piezoelectric elements (1,2) bonded to each other with the polarization axis aligned in the direction of the thickness. The vibration sensor (K) further includes a vibrator (5) of a bending vibration mode, which is subject to resonance at a predetermined frequency and is locally provided in the piezoelectric vibrator (3) such that a portion of the piezoelectric vibrator (3), disposed peripherally of the vibrator (5) of the bending vibration mode, is fixedly supported.
Inventors
- 👤 Tetsuji Fukada
- 👤 Yukihiko Ise
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:11
CPC Classifications
G; G01; G01H; G01H13/00; G01H11/00; G01H11/06; G01H11/08; H; H10; H10N; H10N30/00; H10N30/30; H10N30/302
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A vibration sensor (K) comprising: a piezoelectric vibrator (3) constituted by a pair of first and second plate-like piezoelectric elements (1,2) bonded to each other; said first and second piezoelectric elements (1,2) having a polarization axis aligned in a direction of thickness thereof; and a vibrator (5) of a bending vibration mode, which is subjected to resonance at a predetermined frequency and is locally provided in said piezoelectric vibrator (3) such that a portion of said piezoelectric vibrator (3), disposed peripherally of said vibrator (5) of the bending vibration mode, is fixedly supported.
Claim 2
Dependent Claim
93 words
A vibration sensor (K) comprising: a piezoelectric vibrator (3) constituted by a pair of first and second plate-like piezoelectric elements (1,2) bonded to each other; said first and second piezoelectric elements (1,2) having a polarization axis aligned in a direction of thickness thereof; and a vibrator (5) of a bending vibration mode, which is subjected to resonance at a predetermined frequency and is locally provided in said piezoelectric vibrator (3) such that a portion of said piezoelectric vibrator (3), disposed peripherally of said vibrator (5) of the bending vibration mode, is fixedly supported.
Claim 3
Dependent Claim
29 words
A vibration sensor (K') as claimed in Claim 1, wherein a plurality of said vibrators (5') of the bending vibration mode are locally provided in said piezoelectric vibrator (3').
Claim 4
Dependent Claim
34 words
A vibration sensor (K") as claimed in Claim 1, wherein said vibrator (5") of the bending vibration mode is so formed as to have, in a longitudinal direction thereof, a uniform surface strain factor.
Claim 5
Dependent Claim
26 words
A vibration sensor as claimed in Claim 1, wherein either one of said first and second plate-like piezoelectric elements (1,2) is replaced by a metallic plate.
Claim 6
Dependent Claim
31 words
A vibration sensor as claimed in Claim 1, further including a metallic plate which is interposed between said first and second plate-like piezoelectric elements (1,2) in the direction of thickness thereof.
Claim 7
Dependent Claim
39 words
A vibration sensor as claimed in Claim 1, wherein said first and second plate-like piezoelectric elements (1,2) are bonded to each other by the use of inorganic adhesive or solder or through eutectic bonding of gold and • silicon.
Claim 8
Dependent Claim
43 words
A vibration sensor as claimed in Claim 4, wherein the other one of said first and second plate-like piezoelectric elements (1,2) is bonded to said metallic plate by the use of inorganic adhesive or solder or through eutectic bonding of gold and silicon.
Claim 9
Dependent Claim
39 words
A vibration sensor as claimed in Claim 5, wherein said first and second plate-like piezoelectric elements (1,2) are bonded to said metallic plate by the use of inorganic adhesive or solder or through eutectic bonding of gold and silicon.
References Cited (Backward Citations)
No citation records indexed.
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