CN210252993U - Ultrasonic transducer based on ultrasonic wave direction focusing structure - Google Patents
Ultrasonic transducer based on ultrasonic wave direction focusing structure Download PDFInfo
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- CN210252993U CN210252993U CN201920801697.0U CN201920801697U CN210252993U CN 210252993 U CN210252993 U CN 210252993U CN 201920801697 U CN201920801697 U CN 201920801697U CN 210252993 U CN210252993 U CN 210252993U
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Abstract
The utility model belongs to the technical field of ultrasonic transducer, a ultrasonic transducer based on ultrasonic wave direction focus structure is related to, include: the bottom of the protective shell layer is provided with a focus surface protruding outwards; the inner part of the protective shell layer is sequentially provided with a matching layer, a piezoelectric crystal layer and a back lining layer which are connected from bottom to top, and the matching layer is fixedly bonded at the bottom of the protective shell layer; the lower electrode face welding of piezoelectric crystal layer has first extraction electrode, and the upper electrode face welding of piezoelectric crystal layer has the second extraction electrode, all is equipped with the sealing layer between matching layer, piezoelectric crystal layer, back sheet and the protective housing layer. When the ultrasonic wave is emitted, the energy of the central area of the piezoelectric crystal layer is the largest, the central area is gradually weakened in the radial outward direction, the propagation direction of the ultrasonic wave is in a divergent mode, the ultrasonic wave signal is compressed by using the focusing surface, the signal energy is increased, certain focusing performance is achieved, the focusing structure can improve the ultrasonic wave detection energy, and the measurement accuracy of the product is improved to a greater extent.
Description
Technical Field
The utility model belongs to the technical field of ultrasonic transducer, a ultrasonic transducer based on ultrasonic wave direction focus structure is related to.
Background
The traditional ultrasonic gas sensor has different requirements on signal strength, propagation direction and the like for different application scenes and functions, and meanwhile, as a product design aiming at users, the energy requirement of ultrasonic waves is not negligible.
The traditional gas ultrasonic sensor only considers that the property of the sound-producing material is not the only index of the performance of the transducer, and the transducer can only show good property when the impedance of the sound-producing material and the matching layer is perfectly connected. In the actual process of propagating ultrasonic waves in a medium, the propagation of the ultrasonic waves has directivity in the medium, so the directional focalization of the ultrasonic waves is also an important parameter for improving the performance of the ultrasonic sensor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an ultrasonic transducer based on ultrasonic wave direction focus structure, make the direction of sending of ultrasonic wave have certain focus nature to improve ultrasonic detection performance.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the ultrasonic transducer based on the ultrasonic wave direction focusing structure comprises: the bottom of the protective shell layer is provided with a focus surface protruding outwards; the inner part of the protective shell layer is sequentially provided with a matching layer, a piezoelectric crystal layer and a back lining layer which are connected from bottom to top, and the matching layer is fixedly bonded at the bottom of the protective shell layer; the lower electrode surface of the piezoelectric crystal layer is welded with a first leading-out electrode, the upper electrode surface of the piezoelectric crystal layer is welded with a second leading-out electrode, and sealing layers are arranged among the matching layer, the piezoelectric crystal layer, the back lining layer and the protective shell layer.
Furthermore, the circle center of the focusing plane coincides with the center of the protective shell layer, and when ultrasonic waves are emitted, the energy of the central area of the piezoelectric crystal layer is the largest, the central area is gradually weakened towards the outer direction along the radial direction, the propagation direction of the ultrasonic waves is in a divergent mode, the focusing characteristic of the ultrasonic waves can be achieved by the focusing plane, and the detection energy of the ultrasonic waves can be improved.
Further, the top of matching layer is the plane, and the bottom be with focus face assorted cambered surface, the focusing characteristic of ultrasonic wave can be realized to the focus structure on matching layer and protective housing layer, can improve the ultrasonic detection energy, has the advantage that promotes the measurement accuracy of product to a great extent.
Furthermore, the first extraction electrode and the second extraction electrode are tightly attached to the piezoelectric crystal layer and the back lining layer, so that the situation that the extraction electrodes are in contact with an external metal tube shell to cause circuit communication and influence the generation of ultrasonic waves is avoided.
Furthermore, the first leading-out electrode is provided with a bend, the bend divides the first leading-out electrode into a vertical part and a horizontal part, and the horizontal part is welded and fixed on the lower electrode surface of the piezoelectric crystal layer.
Furthermore, the sealing layer is formed by adopting epoxy resin for encapsulation, so that the sealing problem of the product is solved, the fixing problem of the internal circuit of the product is solved, and the absorption problem of ultrasonic echo is also solved.
Further, the bottom of the matching layer is fixedly bonded with the bottom of the protective shell layer through glue.
Further, the piezoelectric crystal layer is closely arranged above the matching layer, and the matching layer and the piezoelectric crystal layer are fixedly bonded through glue; the back lining layer is tightly attached to the upper side of the piezoelectric crystal layer, and the piezoelectric crystal layer is bonded with the back lining layer in a sealing mode through epoxy resin.
Furthermore, the protective shell layer is made of stainless steel with high strength and high impact resistance,
compared with the prior art, the utility model provides a technical scheme includes following beneficial effect: through the design to matching layer and protective housing layer, because when the ultrasonic wave sent, piezoelectric crystal layer's central zone energy was the biggest, along radial outwards direction gradually weakens, and ultrasonic wave propagation direction is the formula of dispersing, utilizes the focus face to compress ultrasonic signal for signal energy increases, has certain focus nature, and this focus structure can improve the ultrasonic detection energy, can promote the measurement accuracy of product to a great extent.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an ultrasonic transducer based on an ultrasonic wave direction focusing structure provided by the present invention.
Wherein: 1 is a protective shell layer; 2 is a matching layer; 3 is a piezoelectric crystal layer; 4 is a back lining layer; 5 is a focusing plane; 6 is a first extraction electrode; 7 is a second extraction electrode; and 8 is a sealing layer.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of structures consistent with certain aspects of the invention, as detailed in the appended claims.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments.
Examples
Referring to fig. 1, the present invention provides an ultrasonic transducer based on an ultrasonic direction focusing structure, including: the device comprises a protective shell layer 1, wherein a focus surface 5 protruding outwards is arranged at the bottom of the protective shell layer 1; the inner part of the protective shell layer 1 is sequentially provided with a matching layer 2, a piezoelectric crystal layer 3 and a back lining layer 4 which are connected from bottom to top, and the matching layer 2 is fixedly bonded at the bottom of the protective shell layer 1; the lower electrode face welding of piezoelectric crystal layer 3 has first extraction electrode 6, and the upper electrode face welding of piezoelectric crystal layer 3 has second extraction electrode 7, all is equipped with sealing layer 8 between matching layer 2, piezoelectric crystal layer 3, back sheet 4 and the protective housing layer 1.
Furthermore, the center of the focus plane 5 coincides with the center of the protective shell layer 1, and since the energy of the central area of the piezoelectric crystal layer is the largest when the ultrasonic wave is emitted and gradually weakens in the radial outward direction, and the propagation direction of the ultrasonic wave is divergent, the focus plane 5 can realize the focusing characteristic of the ultrasonic wave, and the detection energy of the ultrasonic wave can be improved.
Further, the top of matching layer 2 is the plane, and the bottom is the cambered surface with 5 assorted focus faces, and the focusing characteristic of ultrasonic wave can be realized to the focusing structure of matching layer 2 and protective housing layer 1, can improve the ultrasonic detection energy, can promote the measurement accuracy of product to a great extent.
Furthermore, the first extraction electrode 6 and the second extraction electrode 7 are both closely attached to the piezoelectric crystal layer 3 and the backing layer 4, so as to avoid the first extraction electrode 6 and the second extraction electrode 7 from contacting with an external metal tube shell, which leads to circuit communication and influences the generation of ultrasonic waves.
Further, the first lead-out electrode 6 is provided with a bend dividing the first lead-out electrode 6 into a vertical portion and a horizontal portion, and the horizontal portion is welded and fixed to the lower electrode surface of the piezoelectric crystal layer 3.
Furthermore, the sealing layer 8 is formed by adopting epoxy resin for encapsulation, so that the sealing problem of the product is solved, the fixing problem of the internal circuit of the product is solved, and the absorption problem of ultrasonic echo is also solved.
Further, the bottom of the matching layer 2 is fixed to the bottom of the protective casing layer 1 by adhesion with glue.
Further, the piezoelectric crystal layer 3 is closely mounted above the matching layer 2, and the matching layer 2 and the piezoelectric crystal layer 3 are fixedly bonded by glue; the backing layer 4 is closely attached to the upper side of the piezoelectric crystal layer 3, and the piezoelectric crystal layer 3 and the backing layer 4 are hermetically bonded by epoxy resin.
Further, the protective casing layer 1 is made of a stainless steel material having high strength and high impact resistance.
To sum up, the utility model provides an ultrasonic transducer based on ultrasonic wave direction focus structure when realizing the acoustic impedance matching, through the structural design to matching layer 2 and protective housing layer 1, realizes ultrasonic transducer ultrasonic wave propagation direction's focus characteristic. The specific working principle is as follows: the method comprises the following steps in sequence from bottom to top in a protective shell of the stepped ultrasonic transducer: the ultrasonic transducer comprises a protective shell layer 1, a matching layer 2, a piezoelectric crystal layer 3 and a back lining layer 4, wherein the protective shell layer 1 is connected with the matching layer 2 and used for protecting the ultrasonic transducer; the matching layer 2 is connected with the shell protection layer 1 and the piezoelectric crystal layer 3 and is used for matching acoustic impedances of the detection medium and the piezoelectric crystal layer 3; the piezoelectric crystal layer 3 is connected with the matching layer 2 and the back lining layer 4 and is used for generating ultrasonic waves for detection; the backing layer 4 is connected to the piezoelectric crystal layer 3 for absorption of ultrasonic waves transmitted by the piezoelectric crystal. Since the energy of the central region of the piezoelectric crystal layer 3 is maximized when the ultrasonic wave is emitted, and the central region is gradually weakened in the radial direction, and the propagation direction of the ultrasonic wave is divergent, the focusing structure of the matching layer 2 and the protective sheath layer 1 can realize the focusing characteristic of the ultrasonic wave. In addition, the structure adopted by the utility model is easy to process and simple in installation process; and the ultrasonic transducer enables the emitted ultrasonic waves to have certain focusing property, can improve the ultrasonic detection energy, and can improve the measurement precision of products to a greater extent.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (9)
1. An ultrasonic transducer based on an ultrasonic directional focusing structure, comprising: the device comprises a protective shell layer (1), wherein a focus surface (5) protruding outwards is arranged at the bottom of the protective shell layer (1); the inner part of the protective shell layer (1) is sequentially provided with a matching layer (2), a piezoelectric crystal layer (3) and a back lining layer (4) which are connected from bottom to top, and the matching layer (2) is fixedly bonded to the bottom of the protective shell layer (1); the lower electrode face welding of piezoelectric crystal layer (3) has first extraction electrode (6), the upper electrode face welding of piezoelectric crystal layer (3) has second extraction electrode (7), all be equipped with sealing layer (8) between matching layer (2), piezoelectric crystal layer (3), back sheet (4) and protection shell layer (1).
2. The ultrasonic transducer based on the ultrasonic direction focusing structure of claim 1, wherein the center of the focusing plane (5) coincides with the center of the protective housing layer (1).
3. The ultrasonic transducer based on the ultrasonic wave direction focusing structure of claim 1, wherein the top of the matching layer (2) is a plane surface, and the bottom is an arc surface matched with the focusing surface (5).
4. The ultrasonic transducer based on the ultrasonic direction focusing structure of claim 1, wherein the first extraction electrode (6) and the second extraction electrode (7) are tightly attached to the piezoelectric crystal layer (3) and the backing layer (4).
5. The ultrasonic transducer based on the ultrasonic direction focusing structure of claim 1, wherein the first extraction electrode (6) is provided with a bend dividing the first extraction electrode (6) into a vertical part and a horizontal part, and the horizontal part is welded and fixed to the lower electrode surface of the piezoelectric crystal layer (3).
6. The ultrasonic transducer based on the ultrasonic direction focusing structure according to any one of claims 1 to 5, wherein the sealing layer (8) is formed by epoxy potting.
7. The ultrasonic transducer based on the ultrasonic direction focusing structure according to any one of claims 1 to 5, wherein the bottom of the matching layer (2) is adhesively fixed with the bottom of the protective housing layer (1) by glue.
8. The ultrasonic transducer based on the ultrasonic direction focusing structure of claim 1, wherein the piezoelectric crystal layer (3) is closely mounted above the matching layer (2), and the matching layer (2) and the piezoelectric crystal layer (3) are fixed by gluing; the backing layer (4) is tightly attached to the upper side of the piezoelectric crystal layer (3), and the piezoelectric crystal layer (3) is sealed and bonded with the backing layer (4) through epoxy resin.
9. The ultrasonic transducer based on the ultrasonic direction focusing structure of any one of claims 1 to 5, wherein the protective casing layer (1) is made of stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920801697.0U CN210252993U (en) | 2019-05-30 | 2019-05-30 | Ultrasonic transducer based on ultrasonic wave direction focusing structure |
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| CN201920801697.0U CN210252993U (en) | 2019-05-30 | 2019-05-30 | Ultrasonic transducer based on ultrasonic wave direction focusing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445896A (en) * | 2022-08-31 | 2022-12-09 | 南京航空航天大学 | Ultrasonic transducer |
| CN115779286A (en) * | 2022-11-15 | 2023-03-14 | 谱创医疗科技(上海)有限公司 | Catheter device and method of using the same |
| TWI799045B (en) * | 2021-12-30 | 2023-04-11 | 立鑽工業股份有限公司 | Piezoelectric transducers |
-
2019
- 2019-05-30 CN CN201920801697.0U patent/CN210252993U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI799045B (en) * | 2021-12-30 | 2023-04-11 | 立鑽工業股份有限公司 | Piezoelectric transducers |
| CN115445896A (en) * | 2022-08-31 | 2022-12-09 | 南京航空航天大学 | Ultrasonic transducer |
| CN115779286A (en) * | 2022-11-15 | 2023-03-14 | 谱创医疗科技(上海)有限公司 | Catheter device and method of using the same |
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