Claims
- 1. An acceleration sensor comprising:
- a plurality of plate-shaped vibrating bodies connected at a folding portion wherein the vibrating bodies are arranged in a folding manner; and
- piezoelectric elements formed on surfaces of said vibrating bodies, wherein
- said vibrating bodies vibrate in such a manner that longitudinal expansion and contraction take place inversely on both sides of the folding portion by applying a driving signal to said piezoelectric elements.
- 2. An acceleration sensor according to claim 1, wherein two said vibrating bodies are connected in said folding manner at a right angle, and a pair of said piezoelectric elements are formed on opposite surfaces of each of said vibrating bodies.
- 3. An acceleration sensor according to claim 1 which further comprises frames connected with each other for supporting said vibrating bodies connected with each other.
- 4. An acceleration sensor according to claim 2, wherein one pair of said piezoelectric elements are polarized in a direction from an outside toward a surface of said vibrating body and another pair of said piezoelectric elements are polarized in a direction from the surface of said vibrating body toward the outside.
- 5. An acceleration sensor according to claim 3, wherein one pair of said piezoelectric elements are polarized in a direction from an outside toward a surface of said vibrating body, and another pair of said piezoelectric elements are polarized in a direction from the surface of said vibrating body toward the outside.
- 6. An acceleration sensor according to claim 2, wherein driving signals having inverse phase are applied to two pairs of said piezoelectric elements on said vibrating bodies.
- 7. An acceleration sensor according to claim 3, wherein driving signals having inverse phase are applied to two pairs of said piezoelectric elements on said vibrating bodies.
Priority Claims (6)
Number |
Date |
Country |
Kind |
5-066231 |
Mar 1993 |
JPX |
|
5-066233 |
Mar 1993 |
JPX |
|
5-085712 |
Mar 1993 |
JPX |
|
5-123421 |
Apr 1993 |
JPX |
|
5-123422 |
Apr 1993 |
JPX |
|
5-125485 |
Apr 1993 |
JPX |
|
Parent Case Info
This is a divisional of application Ser. No. 08/202,017 filed Feb. 25, 1994pending.
US Referenced Citations (3)
Foreign Referenced Citations (3)
Number |
Date |
Country |
23 28 807 |
Jan 1975 |
DEX |
6-249873 |
Sep 1994 |
JPX |
6-249874 |
Sep 1994 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
202017 |
Feb 1994 |
|