CN2369412Y - 曲线条型压电振子 - Google Patents
曲线条型压电振子 Download PDFInfo
- Publication number
- CN2369412Y CN2369412Y CN97221443U CN97221443U CN2369412Y CN 2369412 Y CN2369412 Y CN 2369412Y CN 97221443 U CN97221443 U CN 97221443U CN 97221443 U CN97221443 U CN 97221443U CN 2369412 Y CN2369412 Y CN 2369412Y
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- CN
- China
- Prior art keywords
- piezoelectric
- piezoelectric material
- vibrator
- composite
- curved
- 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.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000003475 lamination Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Luminescent Compositions (AREA)
Abstract
本实用新型提供一种新型的压电振子,由压电材料条或复合压电材料条构成,改进传统的直线型双叠片模式,压电材料条或复合压电材料条分布在一空间曲线上,可呈盘簧型,塔簧型或直升簧型。因曲线盘旋特性大幅度地减小压电振子的空间占宽,在具有同样低频和带宽的情况下,振子线度更低,质量更小。并因曲线型压电振子弯矩所带来的压电效应或扭矩带来的压电效应使得振子的机电转换效率提高。
Description
本实用新型属于声学与电子技术领域,尤其涉及一种机电转换器件的压电振子。
目前压电振子均以压电材料与压电材料或以压电材料与非压电材料形成一定结构作为机电转换器件与仪器的核心。为实现低频、宽频带情况下的高机电转换,多采用其工作在其本身固定频率附近。一般地讲,振子的设计频率越低,其体积越大。由于压电材料本身加工上的困难,通常采用的长度、厚度、板的弯曲等振动方式,为实现低频、宽频带情况下的高机电转换都会造成振子的尺度大、质量大。当前双叠片弯曲振动式振子较其它振子最具小尺度特征,然而,自1931年问世以来(见C.B.Sawyer.“The use of rochelle salt crystals for electrical reproducesand microphones”Proc.R.E.Vol:19,no.11,vol.1931.pp.2020-2029),双叠片振子的形状一直保持了直线特征,即它的中心线为一直线,这种形状导致了当设计频率降低时,双叠片长度迅速增加;并因双叠片为弯曲振动方式,导致振子的灵敏度比扭动振动方式下的低。
本实用新型的目的是提供一种新型压电振子,进一步降低压电振子的几何尺度和质量,并提高振子的灵敏度和机电转换效率。
本实用新型将压电材料与压电材料或以压电材料与非压电材料的复合条,按一定空间曲线在空间盘旋。压电材料或复合压电材料可连续或断续分布在此空间曲线上。形状可为盘簧、塔簧或直升簧。压电材料沿曲线方向或垂直于曲线方向极化。压电材料可多层复合或多电极复合。
本实用新型由于采用曲线条型压电振子,在保持低共振频属性的同时,曲线盘旋特性大幅度地减小压电振子的空间占宽,在具有同样低频和带宽的情况下,振子线度更低,质量更小。又因曲线型压电振子既有弯矩,又有扭矩。在弯曲振动模式下弯矩所带来的压电效应或扭转振动模式下扭矩带来的压电效应使得振子的机电转换效率提高。
附图说明
图1盘簧结构示意图
1--盘簧中心 2--盘簧端点
实施例
宽2.4mm,厚0.2mm的压电陶瓷和相同宽厚的黄铜两层材料复合,制成盘簧形状,在极坐标下,其中心线符合方程r=kθ,其中k=16.2/(8∏)(mm),θ从0到8∏取值,测试结果:振动基频42Hz,在加电压15V时,中心固定另一端振动位移大于1.5mm。
Claims (10)
1.一种曲线条型压电振子,由压电材料条或复合压电材料条构成,其特征在于压电材料条或复合压电材料条设置在一空间曲线上。
2.如权利要求1所述的曲线条型压电振子,其特征在于压电材料条或复合压电材料条的设置是连续的。
3.如权利要求1所述的曲线条型压电振子,其特征在于压电材料条或复合压电材料条的设置是断续的。
4.如权利要求1所述的曲线条型压电振子,其特征在于压电材料条或复合压电材料条呈盘簧型。
5.如权利要求1所述的曲线条型压电振子,其特征在于压电材料条或复合压电材料条呈塔簧型。
6.如权利要求1所述的曲线条型压电振子,其特征在于压电材料条或复合压电材料条呈直升簧型。
7.如权利要求1所述的曲线条型压电振子,其特征在于压电材料沿曲线方向极化。
8.如权利要求1所述的曲线条型压电振子,其特征在于压电材料沿垂直于曲线方向极化。
9.如权利要求1所述的曲线条型压电振子,其特征在于复合压电材料条多层复合。
10.如权利要求1所述的曲线条型压电振子,其特征在于复合压电材料条多电极复合。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN97221443U CN2369412Y (zh) | 1997-02-04 | 1997-07-22 | 曲线条型压电振子 |
PCT/CN1998/000017 WO1998034434A1 (fr) | 1997-02-04 | 1998-01-27 | Ressort piezo-electrique |
AU57471/98A AU5747198A (en) | 1997-02-04 | 1998-01-27 | Piezoelectric spring element |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN97201121 | 1997-02-04 | ||
CN97201121.8 | 1997-02-04 | ||
CN97221443U CN2369412Y (zh) | 1997-02-04 | 1997-07-22 | 曲线条型压电振子 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2369412Y true CN2369412Y (zh) | 2000-03-15 |
Family
ID=25744447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN97221443U Expired - Fee Related CN2369412Y (zh) | 1997-02-04 | 1997-07-22 | 曲线条型压电振子 |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN2369412Y (zh) |
AU (1) | AU5747198A (zh) |
WO (1) | WO1998034434A1 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110661450A (zh) * | 2019-09-23 | 2020-01-07 | 广西大学 | 微分几何特征非线性化的压电振子 |
WO2022006816A1 (zh) * | 2020-07-09 | 2022-01-13 | 诺思(天津)微系统有限责任公司 | Mems压电扬声器 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2364965B (en) * | 1997-09-05 | 2002-04-03 | 1 Ltd | Manufacture of piezoelectric print head |
US6833656B2 (en) | 1999-12-21 | 2004-12-21 | 1 . . . Limited | Electro active devices |
GB0115074D0 (en) | 2001-06-20 | 2001-08-15 | 1 Ltd | Sensors using an electro-active device |
GB2376796B (en) * | 2001-06-20 | 2004-12-15 | 1 Ltd | Motors and generators using an electro-active device |
GB0115073D0 (en) | 2001-06-20 | 2001-08-15 | 1 Ltd | Camera lens positioning using an electro-active device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2191909B (en) * | 1986-06-19 | 1989-12-20 | Plessey Co Plc | Acoustic transducer |
WO1988003739A1 (en) * | 1986-11-07 | 1988-05-19 | Plessey Australia Pty. Limited | A composite sonar transducer for operation as a low frequency underwater acoustic source |
US5452267A (en) * | 1994-01-27 | 1995-09-19 | Magnetrol International, Inc. | Midrange ultrasonic transducer |
-
1997
- 1997-07-22 CN CN97221443U patent/CN2369412Y/zh not_active Expired - Fee Related
-
1998
- 1998-01-27 AU AU57471/98A patent/AU5747198A/en not_active Abandoned
- 1998-01-27 WO PCT/CN1998/000017 patent/WO1998034434A1/zh active Application Filing
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110661450A (zh) * | 2019-09-23 | 2020-01-07 | 广西大学 | 微分几何特征非线性化的压电振子 |
CN110661450B (zh) * | 2019-09-23 | 2022-03-29 | 广西大学 | 微分几何特征非线性化的压电振子 |
WO2022006816A1 (zh) * | 2020-07-09 | 2022-01-13 | 诺思(天津)微系统有限责任公司 | Mems压电扬声器 |
Also Published As
Publication number | Publication date |
---|---|
WO1998034434A1 (fr) | 1998-08-06 |
AU5747198A (en) | 1998-08-25 |
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C19 | Lapse of patent right due to non-payment of the annual fee | ||
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