CN2391234Y - Wide-angle ultrasound wave transducer - Google Patents

Wide-angle ultrasound wave transducer Download PDF

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Publication number
CN2391234Y
CN2391234Y CN 99207552 CN99207552U CN2391234Y CN 2391234 Y CN2391234 Y CN 2391234Y CN 99207552 CN99207552 CN 99207552 CN 99207552 U CN99207552 U CN 99207552U CN 2391234 Y CN2391234 Y CN 2391234Y
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China
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ultrasonic
transducer
cone
reflector
characterized
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CN 99207552
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Chinese (zh)
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刘中华
叶新林
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刘中华
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Priority to CN 99207552 priority Critical patent/CN2391234Y/en
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Publication of CN2391234Y publication Critical patent/CN2391234Y/en

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Abstract

The utility model relates to an ultrasonic transducer which is mainly applied to a device which needs a wide transmitting angle or a wide receiving angle and carries out signal transfer between an ultrasonic transmitter or an ultrasonic reflector which represents a dynamic point and an ultrasonic receiver which represents a static point. The utility model is especially applied to touch type input equipment which utilizes ultrasonic multiple points to measure distances for realizing the positioning in a multimedia computer. The utility model is characterized in that an ultrasonic reflecting cone which is in the shape of a rotary body shape is coaxially arranged in front of the working face of the general ultrasonic transducer with a plane vibration mode; the tip of the ultrasonic reflecting cone points to the working face. The structure has the advantages of controllable reflecting angles, simple design, easy production and low cost.

Description

广角超声波换能器 Wide ultrasonic transducer

本发明涉及一种超声波发射或接收换能器,主要应用于需要广阔的发射或接收角,在超声波发射或反射装置所代表的动点与超声波接收器所代表的静点之间进行信号传递的场合,如使用一个超声波发射或反射器和多个分布安装且位置已知的接收器,通过测量代表标的物发射或反射器与各个接收器之间的距离,来确定标的物位置的检测装置之中,特别是应用于多媒体计算机利用超声波多点测距实现定位的触摸式输入设备上。 The present invention relates to an ultrasonic transducer to transmit or receive, is mainly applied to transmit or receive a wide angle, a signal is transmitted between the static point represented transmitted ultrasound reflecting means or represents fixed point and an ultrasonic receiver applications, such as using ultrasonic waves emitted or reflected from a plurality of distribution and installation and a known position of the receiver, the subject matter of each transmitter between the reflector and the receiver by measuring a representative or to determine the position detecting means of the subject matter of in particular applied to the touch type input device a multimedia computer with an ultrasonic ranging to achieve multi-targeting.

现有一般的信号用平面振动模式的超声波换能器的有效工作角,即发射或接收角都是有限的,在超声波的频率较高时更是如此,这是由波的性质所决定的,因此应用在上述分布安装有多个接收换能器的测距定位系统中,由于接收器安装在发射或反射器的周围,代表标的物的发射或反射器的位置是在随时变化的,这就要求接收器具有很宽广的接收角;而对于发射器,则要求有接近或等于360°的发射角。 Conventional general ultrasonic signal plane vibration mode is effectively operating angle transducer, i.e. the emission or reception angle is limited, when higher ultrasound frequencies especially, which is determined by the nature of the wave, Thus in the above application distribution ranging location system receiving transducers are mounted in a plurality, since the receiver or the transmitter is mounted around a reflector, the reflector position of the transmitter, or on behalf of the subject matter is subject to change, which It requires the receiver to have a very wide acceptance angle; for a transmitter, the required emission angle close to or equal to 360 °. 这对于上述的超声波换能器来讲是难以实现的。 This above-described ultrasound transducer concerned is difficult to achieve. 这是因为如果要在某个区域内,或者某个平面内得到宽广的工作角,换能器的尺寸与所工作的波长相比就要尽量小,但这由导致了发射的功率不足或接收的灵敏度降低,使其有效的工作距离缩短。 This is because if in a certain area, or to give a wide operating angle in a plane, the size of the transducer should be as small as compared with the wavelength of the work, but the led emitted or received power shortage the sensitivity is reduced, so that the effective working distance is shortened. 因此,为了实现上述的应用,通常采用以下的技术来实现:1.使用多个换能器组合成为一个广角换能器;2.使用筒形换能器实现平面上的广角工作,见申请号为98101325.2和98101663.4的中国专利。 .; 2 using a cylindrical transducer achieve a wide angle on the working plane, see Application No. 1 using a plurality of transducers are combined into a wide transducer: Thus, in order to achieve the above application, to achieve the following techniques commonly used Chinese patent 98101325.2 and 98101663.4 of. 但这两种方案都有不足之处。 But at the two programs are inadequate. 首先,使用组合的方法用于超声波发射器,会因为超声波的干涉现象而使声场不均匀,产生许多个峰谷点,使得接收器的接收效果不稳定;同时,这种结构要求每个发射换能器的特性相近,安装位置严格,整体的构造也复杂,生产成本高;其次,对于筒形的换能器,虽然声场很均匀,但是由于不容易安装增加辐射阻抗的谐振结构,而使其特性灵敏度下降,并且对于频率较低的应用,换能器的直径又不能很小,或者附加了谐振结构后导致直径或体积过大而难于实用。 First, a method for using a combination of an ultrasonic transmitter, ultrasonic waves because of the phenomenon of uneven interference sound field, generating a plurality of peak points, such that reception of the receiver is unstable; simultaneously, this arrangement requires that each emitting transducer transducer similar properties, the installation position of the rigid, the overall structure is complicated, high production costs; Secondly, a cylindrical transducer, although the sound field is very uniform, but not easy to install because increasing the radiation impedance of the resonant structure, and it decreased sensitivity characteristics, and for low frequency applications, the diameter of the transducer is small and can not, or additionally, the resonant structure of the lead diameter or volume is too large and difficult practical.

本发明的目的就在于针对上述用途的超声波换能器的缺点,提供了一种新的结构方案,在换能器的体积增加很小的情况下,实现超声波在360°的广角上均匀地发射或接收。 Object of the present invention is that the disadvantages of the ultrasound transducers used for these purposes is provided a new structure of the program, a small increase in the volume of the case where the transducer, ultrasonic waves achieved uniformly emitted over a wide angle of 360 ° or receive.

本发明的具体结构如下:在一般平面振动模式的超声波发射或接收换能器工作面的轴线方向上,安装一个尖端指向换能器的工作面,即发射或者接收面的锥形旋转体,或简称为反射锥;这个反射锥是圆锥体、球体、椭球体、抛物线旋转体、双曲线旋转体之中的一种,即通过其轴向的剖面曲线是上述曲线之中某种曲线的一部分,或上述旋转体的部分或全部复合体,以及其它特殊曲线或特殊设计的旋转体形反射锥。 Specific structure of the present invention are as follows: the axial direction of the transmitting or receiving transducer is a generally planar face of the ultrasonic vibration mode, a tip pointing mounting face of the transducer, i.e., transmission or receiving surface tapering spinner, or referred to as a reflective cone; this is a reflective cone into cone, sphere, ellipsoid, parabola rotating body, the rotating body is hyperbolic, i.e., through its axial cross-sectional curve is the curve part among the above a certain curve, rotating the rotary body or body part or all of the above-described composite, and other special or specially designed curved reflective cone. 当这个反射锥与换能器同轴时,就能够把发射器向其前方发射的超声波束均匀的反射到发射器侧面周围的空间内,或者把侧面周围空间的超声波反射到接收器的接收面上。 When this reflective cone coaxial with the transducer, it is possible to put forward the ultrasonic beam emitters emitting thereto a uniform reflection into the space around the transmitter side, or the space around the sides of an ultrasonic reflector to a receiver receiving surface on.

由于实施本发明只需要根据要求,在普通的超声波换能器的前方安装一个特定的反射锥,所以本发明在设计反射锥时只需要考虑超声波的反射方向,不必考虑如波的干涉等其它因素,所以具有结构简单、设计、加工容易、生产成本低的优点;尤其在批量生产时,该反射锥可以使用模具来生产,其优点更为突出;再有反射锥的最大直径只要大于工作波长就能够产生有效的反射,所以整个的换能器的体积和直径都很小,更适合实际应用的需要。 Since the embodiment of the present invention requires only upon request, in front of the transducer in the conventional ultrasonic mounting a specific reflection cone, the present invention is in the design of the reflective cone need only consider the reflection direction of the ultrasound without considering other factors such as wave interference, etc. , it is simple in structure, design, easy processing, low production cost advantages; in particular, in mass production, the reflective cone can be produced using a mold, the advantage is more prominent; Note that the maximum diameter of the reflector cone is greater than the operating wavelength on the long effective reflection can be generated, so the entire volume of the transducer and a very small diameter, more suitable for practical application. 另外,使用不同剖面曲线的反射锥,还能够控制与换能器轴线相平行的的平面内的工作角。 Further, the use of different cross-sectional profile of the reflective cone, also possible to control the operating angle in a plane parallel to the axis of the transducer is.

下面结合附图来说明本发明的实施方案。 The following described embodiments of the present invention in conjunction with the accompanying drawings.

图1换能器的整体结构示意图图2轴向剖面是球形或椭球形的反射锥图3轴向剖面是抛物线的反射锥图4轴向剖面是直线和双曲线的复合反射锥在图1中,1是普通的超声波换能器,在它的工作面2的前方、换能器的轴线方向上,安置有尖端指向换能器工作面的反射锥3,从换能器1超声波发射的超声波或外界到达的超声波按照4所示的路线被反射,5是安装座。 FIG overall configuration diagram of transducer 12 is an axial sectional view of the spherical or ellipsoidal reflector cone 3 is an axial cross-sectional view of a parabolic reflector cone FIG. 4 is an axial cross-sectional composite reflector cone hyperbola and a straight line in FIG. 1 1 is a general ultrasonic transducer, in its front face 2, the axial direction of the transducer, there is disposed a tip directed towards the reflector cone face of the transducer 3, the transducer 1 from the ultrasonic wave emitted by the ultrasonic or the ultrasonic wave is reflected outside arriving along the lines shown in FIG. 4, a mount 5. 图2中的6是轴向剖面是球形或椭球形反射锥;图3中的7是轴向剖面是抛物线的反射锥;图4中的反射锥8是由圆锥9和双曲线旋转体10复合而成的。 FIG 26 is an axial cross-section is a spherical or elliptical reflector cone; in FIG. 37 is an axial sectional view of a parabolic reflector cone; reflective cone 48 in FIG. 10 is a composite of the conical rotation body 9 and hyperbolic It made.

超声波换能器与反射锥之间可以使用各种方式安装在一起,如带有小孔的筒形外壳,金属丝、网形支架,以及其它一体的结构件或相对位置固定的两个零件上。 The ultrasonic transducer may be mounted together in various ways between the transducer and the reflector cones, such as a cylindrical casing with a small hole, a wire, mesh-shaped bracket, as well as other structural member integral or fixed relative position of the two parts .

反射锥外围轮廓曲线的形状,可以根据所需要的超声波传播方向和范围来设计。 The peripheral shape of the reflective cone profile curve, can be designed according to the ultrasonic propagation direction and the desired range. 如图1中的反射锥是一个圆锥形的,根据波的反射原理,这种形状可以使被反射或接收的超声波在换能器轴线方向的有效工作角是换能器本身的有效工作角的一半,仅仅改变超声波的传播方向。 The reflection cone is a cone of FIG. 1, in accordance with the principles of the reflected wave, this shape can be reflected ultrasonic waves received valid operating angle or the transducer device is effective in the axial direction of the operating angle of the transducer itself half, changing only the propagation direction of the ultrasound. 如果在换能器和反射锥的周围加上同轴的遮挡外壳,如果不考虑波的衍射,就能够在360°之内控制与其轴线相垂直的某个平面内工作角的大小。 If coupled with a coaxial shield around the transducer housing and the reflector cone, without considering wave diffraction can be controlled within 360 ° of a certain size with respect to its axis perpendicular to the plane of the operating angle.

Claims (8)

1.一种主要应用于需要广阔的发射或接收角,在代表动点的超声波发射或反射器与代表静点的超声波接收器之间进行信号传递的装置中使用的超声波换能器,其特征在于:在平面振动模式的超声波换能器的工作面的前方,安装有一个锥形旋转体即反射锥,该反射锥的尖端指向上述换能器的工作面。 A is used when a wide angle transmit or receive, transmit, or between the reflector and the point representative of the static ultrasonic receiver representative of the ultrasonic motion at the point of the ultrasonic signal transmission apparatus using a transducer, wherein wherein: in front of the ultrasonic transducer face plane vibration mode, there is mounted a rotary body that is tapered reflective cone, the tip of the cone directed to said reflector transducer face.
2.根据权利要求1所述的超声波换能器,其特征在于:反射锥与换能器同轴安装。 The ultrasonic claimed in claim 1, said transducer, characterized in that: a reflective cone mounted coaxially with the transducer.
3.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥是一个圆锥体。 The ultrasonic claim 12 or claim transducer, wherein: the reflector is a tapered cone.
4.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥的轴向剖面曲线是圆的一部分。 The ultrasonic claim 12 or claim transducer, characterized in that: an axial cross-sectional profile of the reflection cone is part of a circle.
5.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥的轴向剖面曲线是抛物线的一部分。 The ultrasonic claim 12 or claim transducer, characterized in that: an axial cross-sectional profile is reflective cone portion of a parabola.
6.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥的轴向剖面曲线是椭圆的一部分。 The ultrasonic claim 12 or claim transducer, characterized in that: an axial cross-sectional profile of the reflector cone is part of an ellipse.
7.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥的轴向剖面曲线是双曲线的一部分。 The ultrasonic claim 12 or claim transducer, characterized in that: an axial cross-sectional profile is part of a reflective cone hyperbola.
8.根据权利要求1或2所述的超声波换能器,其特征在于:反射锥的轴向剖面曲线是一条复合曲线,该复合曲线是由直线、圆、椭圆、抛物线、双曲线等之中的至少两种构成。 The ultrasonic transducer according to claim 1 or claim 2, wherein: an axial cross-section is a curve of cone reflector compound curve, which is a compound curve by a straight line, circle, ellipse, parabola, hyperbola in composed of at least two.
CN 99207552 1999-03-30 1999-03-30 Wide-angle ultrasound wave transducer CN2391234Y (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103797379A (en) * 2011-09-22 2014-05-14 皇家飞利浦有限公司 Ultrasound measurement assembly for multidirectional measurement
CN104898110A (en) * 2015-06-23 2015-09-09 深圳乐行天下科技有限公司 Supersonic wave emitter and balance vehicle system capable of following automatically
US9194845B2 (en) 2006-12-22 2015-11-24 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document
CN105974420A (en) * 2016-07-13 2016-09-28 南京邮电大学 Ultrasonic positioning system based on reflection cones

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9194845B2 (en) 2006-12-22 2015-11-24 Giesecke & Devrient Gmbh Device for outputting and/or receiving ultrasound and ultrasound sensor for inspecting a valuable document
CN102636570B (en) * 2006-12-22 2016-12-14 德国捷德有限公司 An ultrasonic sensor for processing the document processing apparatus securities
CN103797379A (en) * 2011-09-22 2014-05-14 皇家飞利浦有限公司 Ultrasound measurement assembly for multidirectional measurement
CN104898110A (en) * 2015-06-23 2015-09-09 深圳乐行天下科技有限公司 Supersonic wave emitter and balance vehicle system capable of following automatically
CN105974420A (en) * 2016-07-13 2016-09-28 南京邮电大学 Ultrasonic positioning system based on reflection cones

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