Claims
- 1. An acceleration sensor comprising:
- a plurality of plate-shaped vibrating bodies made of piezoelectric material connected with each other so that the surfaces of said vibrating bodies are crossed on one central axis; and
- electrodes formed on surfaces of said plurality of said 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 portion of said vibrating bodies by applying a driving signal to said electrodes.
- 2. An acceleration sensor according to claim 1, wherein two of said plurality of vibrating bodies are connected with each other so that said surfaces of said vibrating bodies are crossed at right angles on one central axis, and a pair of said electrodes 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 both ends of said vibrating bodies connected with each other.
- 4. An acceleration sensor according to claim 2, wherein each of said vibrating bodies is polarized in a direction perpendicular to said electrodes.
- 5. An acceleration sensor according to claim 3, wherein each of said vibrating bodies is polarized in a direction perpendicular to said electrodes.
- 6. An acceleration sensor according to claim 2, wherein driving signals having inverse phase are applied to two pairs of said electrodes on each of said vibrating bodies.
- 7. An acceleration sensor according to claim 3, wherein driving signals having inverse phase are applied to two pairs of said electrodes on each of 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, 1994.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4633204 |
Gounji et al. |
Dec 1986 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
23 28 807 |
Jan 1975 |
DEX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
202017 |
Feb 1994 |
|