CN1225041A - 超声换能器 - Google Patents

超声换能器 Download PDF

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Publication number
CN1225041A
CN1225041A CN97196202A CN97196202A CN1225041A CN 1225041 A CN1225041 A CN 1225041A CN 97196202 A CN97196202 A CN 97196202A CN 97196202 A CN97196202 A CN 97196202A CN 1225041 A CN1225041 A CN 1225041A
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ultrasonic transducer
piezoelectric ceramic
basal plane
ceramic body
stepped profile
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CN1104968C (zh
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鲁道夫·特思
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Pepperl and Fuchs SE
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Siemens AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • B06B1/067—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface which is used as, or combined with, an impedance matching layer

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

为创造一种在具有窄的主波瓣开角的同时具有小的旁波瓣振幅的超声换能器。按照本发明的超声换能器(1)具有一片状的1/4波长匹配体(3),其外周面由阶梯状型面构成。

Description

超声换能器
本发明涉及一种带有一片状压电陶瓷体和一片状1/4波长(λ/4)匹配体的超声换能器。
此类超声换能器应用于超声传感器或者超声非接触式开关(Naeherungsschalter)已为公众所知。它在具有相对窄的声波瓣特性的同时具有相对小的旁波瓣振幅。1/4波长匹配体用于在气体传播介质中发射和接收超声波，优选应用在超声波非接触式开关上。
由DE 39 11 047 C2可知一种带有压电陶瓷体和匹配体的超声换能器，其中匹配体背向压电陶瓷体的表面相对于压电陶瓷体基面和面向该压电陶瓷体的匹配体表面来说具有微不足道的面积差别。在此匹配体的侧面曲线以直线，凹入或凸起的曲线发散或收敛。由此可达到的声波瓣特性具有相对于主波瓣振幅相当于大约-19dB的旁波瓣振幅，这对于超声换能器应用于受约束的环境条件和一旁有干扰体存在时是不够的。
在EP 0 655 156B1中公布了一种带有一匹配体的超声换能器，该匹配体具有一圆柱形外壳面。该超声换能器在外壳表面和/或朝向压电陶瓷体的表面具有曲线陡降。这种结构可以小于-30dB的小旁波瓣振幅达到定向精确的声波瓣。
本发明的目的在于，对上述形式的超声换能器作进一步改进，使其在具有小的旁波瓣振幅的同时具有窄的主波瓣开角。
本发明的目的通过由阶梯式型面构成1/4波长匹配体的外侧周面来实现。
本发明具有优点的实施形式由从属权利要求2至6获得。
下面借助附图对本发明的实施例作进一步的详细说明，附图中：
图1示出带有直角阶梯型面的超声换能器；
图2示出带有非直角阶梯型面的超声换能器。
图1示出按照本发明的超声换能器1的一实施形式的截面图，该超声换能器1具有一圆柱形片状压电陶瓷体2和一与之例如粘接的片状匹配体3。在此该匹配体3的外侧周面由简单的直角阶梯状型面构成。在该简图中，并未示出压电陶瓷体2的金属化上表面和下表面以及朝向匹配体3的金属化表面，该金属化表面例如通过一置入粘合层中的由金属或金属塑料复合材料制成的薄接触膜被接通。通过这种具有优点的侧面阶梯轮廓结构产生匹配体3表面向外发射声波的有利波形，该波形导致带有很小旁波瓣振幅的定向精确的声波瓣。在图例所示实施形式中，片状压电陶瓷体2以及匹配体3朝向压电陶瓷体2的基面的直径为23mm。匹配体3另一朝外的表面直径为28mm，匹配体3的全高为6.5mm，匹配体3上直径为28mm的突出部分的高度为2.4mm。匹配体3由环氧坚固玻璃空心球混合物构成的坚固的合成泡沫所制成。图例所示超声换能器1在大约11°声波瓣开角以-3dB宽度具有大约80KHz的谐振工作频率和很小的大约-30dB的旁波瓣振幅。
图2示出了按照本发明的带有一阶梯状型面的超声换能器1的另一种实施形式，该超声换能器的各表面之间并非相互垂直。当阶梯状型面由两个或更多个直角或非直角阶梯段组成时可以获得其他的实施形式。由此加大的匹配体3声波反射面的直径在此导致一更窄的声波瓣开角。
尽管借助附图所示实施形式对本发明作了说明，但还应注意到，本发明不仅仅局限于所示实施形式，而是包括所有可能的变化，修改和等同的配置，以及由权利要求书所覆盖的内容。

Claims (6)

1．一种带有一片状压电陶瓷体(2)和一片状1/4波长匹配体(3)的超声换能器(1)，其特征在于，1/4波长匹配体(3)的外侧周面由阶梯状型面构成，其中，1/4波长匹配体(3)背向压电陶瓷(2)的，发射声波的基面在全部区域上都平坦，并且大于压电陶瓷体(2)的基面。
2．如权利要求1所述的超声换能器，其特征在于，匹配体(3)朝向压电陶瓷体(2)的基面与压电陶瓷体(2)的基面最多有20％的面积偏差。
3．如权利要求1或2所述的超声换能器，其特征在于，匹配体(3)背向压电陶瓷体(2)的、发射声波的基面至少比压电陶瓷体(2)的基面大30％。
4．如上述任一项权利要求所述的超声换能器，其特征在于，所述阶梯状型面(4)由简单的相互成直角的表面构成。
5．如上述任一项权利要求所述的超声换能器，其特征在于，所述阶梯状型面被设计成具有部分倾斜的、相互不成直角的表面。
6．如上述任一项权利要求所述的超声换能器，其特征在于，所述阶梯状型面(4)由两个或多个直角和/或非直角阶梯组成。
CN97196202A 1996-07-26 1997-07-15 超声换能器 Expired - Fee Related CN1104968C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19630350A DE19630350C2 (de) 1996-07-26 1996-07-26 Ultraschallwandler
DE19630350.8 1996-07-26

Publications (2)

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CN1225041A true CN1225041A (zh) 1999-08-04
CN1104968C CN1104968C (zh) 2003-04-09

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US (1) US6104121A (zh)
EP (1) EP0914215B1 (zh)
JP (1) JP3788520B2 (zh)
CN (1) CN1104968C (zh)
DE (2) DE19630350C2 (zh)
WO (1) WO1998004361A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100496856C (zh) * 2003-11-27 2009-06-10 日立比亚机械股份有限公司 用于通过由包括压电偏转板的偏转单元引导的激光束加工材料的装置
CN107754504A (zh) * 2017-11-07 2018-03-06 西安智水环境科技有限公司 一种消霾系统次声波水分子共震装置

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727877A1 (de) * 1997-06-30 1999-01-07 Bosch Gmbh Robert Ultraschallwandler
JP4499902B2 (ja) * 1999-11-01 2010-07-14 セイコーインスツル株式会社 超音波モータおよび超音波モータ付電子機器
DE19957125A1 (de) * 1999-11-26 2001-06-21 Siemens Ag Ultraschall-Wandler
US20020076470A1 (en) 2000-10-31 2002-06-20 Colgate-Palmolive Company Composition and method
US8669282B2 (en) 2000-10-31 2014-03-11 Hill's Pet Nutrition, Inc. Companion animal compositions including lipoic acid and methods of use thereof
DE202004002107U1 (de) * 2004-02-11 2005-03-31 Siemens Ag Ultraschallwandler
ES2436181T3 (es) 2004-12-29 2013-12-27 Hill's Pet Nutrition Inc. Métodos para inhibir un declive en el aprendizaje y/o la memoria en animales
CN101262780B (zh) 2005-07-14 2013-04-24 希尔氏宠物营养品公司 一种延长动物生命的方法
EP1911530B1 (de) * 2006-10-09 2009-07-22 Baumer Electric AG Ultraschallwandler mit akustischer Impedanzanpassung
DE102007047013A1 (de) * 2007-10-01 2009-04-02 Robert Bosch Gmbh Reaktionsharz und Zweikomponentensystem zur Herstellung desselben
CN101909230A (zh) * 2010-07-15 2010-12-08 哈尔滨工程大学 金属与压电陶瓷和聚合物复合材料宽带水声换能器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556814A (en) * 1984-02-21 1985-12-03 Ngk Spark Plug Co., Ltd. Piezoelectric ultrasonic transducer with porous plastic housing
US4641054A (en) * 1984-08-09 1987-02-03 Nippon Ceramic Company, Limited Piezoelectric electro-acoustic transducer
US4823042A (en) * 1986-07-18 1989-04-18 Rich-Mar Corporation Sonic transducer and method for making the same
DE3911047A1 (de) * 1989-04-05 1990-10-11 Pepperl & Fuchs Ultraschallwandler
EP0420758B1 (en) * 1989-09-29 1995-07-26 Terumo Kabushiki Kaisha Ultrasonic coupler and method for production thereof
EP0655156B1 (de) * 1992-08-13 1996-06-19 Siemens Aktiengesellschaft Ultraschallwandler
DE4423639C2 (de) * 1994-07-06 1997-01-23 Pepperl & Fuchs Ultraschallwandler zum Abstrahlen und/oder Empfangen von Ultraschallwellen in gasförmigen Medien
DE19527018C1 (de) * 1995-07-24 1997-02-20 Siemens Ag Ultraschallwandler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100496856C (zh) * 2003-11-27 2009-06-10 日立比亚机械股份有限公司 用于通过由包括压电偏转板的偏转单元引导的激光束加工材料的装置
CN107754504A (zh) * 2017-11-07 2018-03-06 西安智水环境科技有限公司 一种消霾系统次声波水分子共震装置

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Publication number Publication date
EP0914215A1 (de) 1999-05-12
DE19630350C2 (de) 1998-08-20
US6104121A (en) 2000-08-15
EP0914215B1 (de) 2001-10-17
JP2000515804A (ja) 2000-11-28
DE59704990D1 (de) 2001-11-22
DE19630350A1 (de) 1998-01-29
WO1998004361A1 (de) 1998-02-05
JP3788520B2 (ja) 2006-06-21
CN1104968C (zh) 2003-04-09

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