JPS6412407A - Piezoelectric cable for underwater use - Google Patents
Piezoelectric cable for underwater useInfo
- Publication number
- JPS6412407A JPS6412407A JP16758987A JP16758987A JPS6412407A JP S6412407 A JPS6412407 A JP S6412407A JP 16758987 A JP16758987 A JP 16758987A JP 16758987 A JP16758987 A JP 16758987A JP S6412407 A JPS6412407 A JP S6412407A
- Authority
- JP
- Japan
- Prior art keywords
- hydrophone
- piezoelectric
- coefficient
- produced
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Insulated Conductors (AREA)
Abstract
PURPOSE:To receive sound waves with high output stability without being affected with longitudinal external pressures by arranging a 1st and a 2nd piezoelectric layers continuously in the axial direction of a cable and making the hydrophone coefficients of both of the layers differ from each other. CONSTITUTION:A 1st piezoelectric layer 2 is formed with a material of a larger hydrophone coefficient and its inner and outer sides are polarized respectively to positive and negative poles. A 2nd piezoelectric layer 3 is formed with a material of a smaller hydrophone coefficient and its inner and outer sides are polarized respectively to negative and positive poles. When a piezoelectric cable receives a longitudinal external pressure, electric charges are produced in the layers 2 and 3. The amounts of the charges, however, are equal to each other and a positive and negative poles are shorted and the polarity is eliminated so that no potential difference is produced between output terminals 12 and 13. When the cable receives a sound wave on the other hand, since the hydrophone coefficient of the layer 2 is larger than that of the layer 3, an output corresponding to the sensitivity difference is produced between the terminals 12 and 13. In this way, effect of external pressure is eliminated and the sound wave is received with a high output and stability.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167589A JP2526066B2 (en) | 1987-07-03 | 1987-07-03 | Underwater piezoelectric cable |
| US07/212,676 US4841494A (en) | 1987-07-03 | 1988-06-28 | Underwater piezoelectric arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62167589A JP2526066B2 (en) | 1987-07-03 | 1987-07-03 | Underwater piezoelectric cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6412407A true JPS6412407A (en) | 1989-01-17 |
| JP2526066B2 JP2526066B2 (en) | 1996-08-21 |
Family
ID=15852559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62167589A Expired - Lifetime JP2526066B2 (en) | 1987-07-03 | 1987-07-03 | Underwater piezoelectric cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526066B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064345A (en) * | 1996-12-06 | 2000-05-16 | Asahi Glass Company Ltd. | Glass antenna device for an automobile |
| CN114034377A (en) * | 2021-09-28 | 2022-02-11 | 青岛国数信息科技有限公司 | Double-layer AIN piezoelectric film hydrophone chip unit, chip and hydrophone |
-
1987
- 1987-07-03 JP JP62167589A patent/JP2526066B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064345A (en) * | 1996-12-06 | 2000-05-16 | Asahi Glass Company Ltd. | Glass antenna device for an automobile |
| CN114034377A (en) * | 2021-09-28 | 2022-02-11 | 青岛国数信息科技有限公司 | Double-layer AIN piezoelectric film hydrophone chip unit, chip and hydrophone |
| CN114034377B (en) * | 2021-09-28 | 2024-03-22 | 青岛国数信息科技有限公司 | Double-layer AIN piezoelectric film hydrophone chip unit, chip and hydrophone |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2526066B2 (en) | 1996-08-21 |
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