WO2008011759A1 - Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique - Google Patents

Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique Download PDF

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Publication number
WO2008011759A1
WO2008011759A1 PCT/CN2006/001805 CN2006001805W WO2008011759A1 WO 2008011759 A1 WO2008011759 A1 WO 2008011759A1 CN 2006001805 W CN2006001805 W CN 2006001805W WO 2008011759 A1 WO2008011759 A1 WO 2008011759A1
Authority
WO
WIPO (PCT)
Prior art keywords
acoustic lens
focusing transducer
lens
acoustic
ultrasonic
Prior art date
Application number
PCT/CN2006/001805
Other languages
English (en)
Chinese (zh)
Other versions
WO2008011759A8 (fr
Inventor
Xudong Wu
Original Assignee
Beijing Yuande Bio-Medical Engineering Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Yuande Bio-Medical Engineering Co., Ltd. filed Critical Beijing Yuande Bio-Medical Engineering Co., Ltd.
Priority to PCT/CN2006/001805 priority Critical patent/WO2008011759A1/fr
Priority to CNA200680055280XA priority patent/CN101484208A/zh
Publication of WO2008011759A1 publication Critical patent/WO2008011759A1/fr
Publication of WO2008011759A8 publication Critical patent/WO2008011759A8/fr

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/30—Sound-focusing or directing, e.g. scanning using refraction, e.g. acoustic lenses

Definitions

  • This invention relates to ultrasonic transducers, and more particularly to ultrasonic phased focus transducers, such as medical ultrasonic phased focus transducers. Background technique
  • a conventional ultrasonic phase-controlled focusing transducer includes an array of a plurality of ultrasonic transducers for focusing a sound beam by controlling a driving signal of a piezoelectric crystal (piezoelectric ceramic sheet) of each of the transducers. purpose.
  • Such a conventional ultrasonic phase-controlled focusing transducer first requires a relatively complicated electronic driving control circuit; in addition, in order to ensure a sufficient three-dimensional spatial range of focus, it is required that each piezoelectric ceramic piece emits a sound field range sufficiently large, however, For a piezoelectric ceramic sheet, to increase its sound field emission range, its size must be reduced. As the size is reduced, not only processing is difficult, but also sufficient emission intensity is not easily achieved. Summary of the invention
  • Another object of the present invention is to provide an ultrasonic phased focus transducer capable of ensuring a sufficient range of three-dimensional movement of the focus.
  • the ultrasonic phase-controlled focus transducer of the present invention includes (the following sections basically copy the claims, first vacant, etc., after the claims are revised) BRIEF DESCRIPTION OF THE DRAWINGS
  • Figure 1 illustrates a spherical convex lens based ultrasound focus transducer in accordance with one embodiment of the present invention
  • Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1.
  • the piezoelectric crystal material used in the ultrasonic transducer of the present invention is, for example, a conventional circular piezoelectric ceramic sheet 1.
  • an acoustic lens is bonded to the circular piezoelectric ceramic sheet.
  • the acoustic lens is a spherical convex lens 2 (see Fig. 1).
  • the spherical convex lens 2 can be made of a metal material such as aluminum or copper, an alloy material, or the like, or can be made of an organic glass material or an epoxy resin material.
  • the spherical convex lens 2 is bonded to the piezoelectric ceramic sheet 1 through a bonding layer 3, and the material of the bonding layer may include various materials for coupling acoustic waves into the metal spherical convex lens, such as a resin bonding material, etc. Add an appropriate amount of metal powder (such as tungsten powder) to improve acoustic impedance matching.
  • metal powder such as tungsten powder
  • the ultrasonic waves emitted from the piezoelectric ceramic sheets are then focused by controlling the driving signals to form a complete ultrasonic (phase-controlled) focusing transducer.
  • a large sound field emission range is ensured while ensuring high emission intensity.
  • For a traditional piezoelectric ceramic sheet to increase its sound field emission range, its size must be reduced. The small size means that it is not easy to achieve sufficient emission intensity, and at the same time increases the difficulty of processing.
  • the sound field emission range and the high emission intensity are ensured, and the processing cost is reduced.
  • Figure 2 shows the mechanical dimensions of the spherical convex lens of Figure 1. among them:
  • ⁇ 1 Diameter of the piezoelectric ceramic piece.
  • the opening angle of the spherical piece, its size is related to the sound field emission range required by the system. The larger the sound field emission range, the larger a.
  • HI The height of the entire acoustic lens.
  • H2 The height of the cylinder in the acoustic lens.
  • SR1 The spherical radius of the acoustic lens.
  • the illustrated ultrasonic focusing transducer comprises a piezoelectric ceramic sheet
  • the illustrated acoustic lens preferably comprises an integral cylindrical body and a convex spherical body. Therefore, the sound waves emitted from the piezoelectric ceramic sheets are "refracted" by the convex spheres of the same material after passing through the cylinder, thereby avoiding the adverse effect of the bonding interface on the sound waves.
  • the acoustic lens may also comprise only convex lenses composed of convex spheres.
  • the ultrasonic focusing transducer may comprise an array of a plurality of piezoelectric ceramic sheets, while simultaneously covering an entire transmitting surface with an acoustic lens.
  • the array emission phase control and the acoustic lens focus control can be simultaneously used, and the phase control emission is simultaneously achieved, and the sound field emission range and intensity are increased.
  • the acoustic lens shown is a convex lens having a circular spherical surface.
  • the acoustic lens can be designed to include a non-circular or non-spherical surface, even a complex curved surface, similar to the effect of the optical lens on the beam, on the beam Focusing compensates or corrects the "acoustic aberration".
  • the acoustic lens may include more than one through The mirror, but a combined lens comprising a plurality of lenses (for example, a plurality of concave and convex lenses with appropriate acoustic bonding), further achieves precise control of the focus.
  • the spherical convex lens-based ultrasonic focusing transducer of the present invention can be used in various ultrasonic instruments.
  • various medical ultrasonic scanners ultrasonic probes in the probe.
  • ultrasonic probes in the probe Especially used in high intensity focused ultrasound (HIFLJ) therapeutic apparatus.
  • HIFLJ high intensity focused ultrasound

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

L'invention concerne un transducteur à ultrasons comprenant un élément céramique piézoélectrique de forme circulaire sur lequel est fixée une lentille sphérique constituée de matériaux métalliques ou de matériaux en alliage tels que l'alumine ou le cuivre. Le lentille sphérique est reliée à l'élément céramique piézoélectrique par l'intermédiaire d'une couche de liaison. Puisque la lentille sphérique peut transmettre une onde acoustique, et que l'onde ultrasonore émise par l'élément céramique piézoélectrique peut être focalisée par commande d'un signal de commande, il est possible de créer un transducteur à focalisation d'ultrasons (par réglage de phase) intégrée.
PCT/CN2006/001805 2006-07-21 2006-07-21 Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique WO2008011759A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2006/001805 WO2008011759A1 (fr) 2006-07-21 2006-07-21 Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique
CNA200680055280XA CN101484208A (zh) 2006-07-21 2006-07-21 基于球面凸透镜的超声相控聚焦换能器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2006/001805 WO2008011759A1 (fr) 2006-07-21 2006-07-21 Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique

Publications (2)

Publication Number Publication Date
WO2008011759A1 true WO2008011759A1 (fr) 2008-01-31
WO2008011759A8 WO2008011759A8 (fr) 2009-02-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/001805 WO2008011759A1 (fr) 2006-07-21 2006-07-21 Transducteur à focalisation d'ultrasons par réglage de phase, fondé sur une lentille sphérique

Country Status (2)

Country Link
CN (1) CN101484208A (fr)
WO (1) WO2008011759A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102430512A (zh) * 2011-09-30 2012-05-02 东南大学 Mems玻璃球面超声换能器片上集成系统及其制备方法
CN103007859A (zh) * 2012-12-31 2013-04-03 东南大学 玻璃球面超声聚焦空化增强微反应器及制备方法
CN111112037A (zh) * 2020-01-20 2020-05-08 重庆医科大学 透镜式多频聚焦超声换能器、换能系统及其声焦域轴向长度的确定方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110227216A (zh) * 2018-03-06 2019-09-13 重庆海扶医疗科技股份有限公司 超声换能器
CN110227217A (zh) * 2018-03-06 2019-09-13 重庆海扶医疗科技股份有限公司 超声换能器
CN108671426B (zh) * 2018-07-17 2023-12-05 重庆医科大学 超声换能器
CN109596183B (zh) * 2018-12-26 2024-04-05 无锡市宇超电子有限公司 一种流量换能器
CN113996518B (zh) * 2021-11-18 2023-10-31 无锡海鹰医疗科技股份有限公司 一种双透镜聚焦超声换能器增幅结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488957A (en) * 1994-11-21 1996-02-06 General Electric Company System and method for promoting adhesion between lens and matching layer of ultrasonic transducer
JP2001069594A (ja) * 1999-08-26 2001-03-16 Matsushita Electric Ind Co Ltd 超音波探触子
CN1626041A (zh) * 2003-12-09 2005-06-15 株式会社东芝 超声波探头和超声波诊断装置
CN1669672A (zh) * 2005-04-20 2005-09-21 南京航空航天大学 压电式多阵元高强度聚焦超声换能器及聚焦方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5488957A (en) * 1994-11-21 1996-02-06 General Electric Company System and method for promoting adhesion between lens and matching layer of ultrasonic transducer
JP2001069594A (ja) * 1999-08-26 2001-03-16 Matsushita Electric Ind Co Ltd 超音波探触子
CN1626041A (zh) * 2003-12-09 2005-06-15 株式会社东芝 超声波探头和超声波诊断装置
CN1669672A (zh) * 2005-04-20 2005-09-21 南京航空航天大学 压电式多阵元高强度聚焦超声换能器及聚焦方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102430512A (zh) * 2011-09-30 2012-05-02 东南大学 Mems玻璃球面超声换能器片上集成系统及其制备方法
CN103007859A (zh) * 2012-12-31 2013-04-03 东南大学 玻璃球面超声聚焦空化增强微反应器及制备方法
CN111112037A (zh) * 2020-01-20 2020-05-08 重庆医科大学 透镜式多频聚焦超声换能器、换能系统及其声焦域轴向长度的确定方法

Also Published As

Publication number Publication date
WO2008011759A8 (fr) 2009-02-19
CN101484208A (zh) 2009-07-15

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