CN220258617U - Shell of gas-medium ultrasonic transducer - Google Patents
Shell of gas-medium ultrasonic transducer Download PDFInfo
- Publication number
- CN220258617U CN220258617U CN202321793499.7U CN202321793499U CN220258617U CN 220258617 U CN220258617 U CN 220258617U CN 202321793499 U CN202321793499 U CN 202321793499U CN 220258617 U CN220258617 U CN 220258617U
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- Prior art keywords
- cylindrical barrel
- ultrasonic transducer
- air
- housing
- dielectric
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- 238000003466 welding Methods 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 4
- 239000002985 plastic film Substances 0.000 abstract description 3
- 238000005498 polishing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000004382 potting Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PNHBRYIAJCYNDA-VQCQRNETSA-N (4r)-6-[2-[2-ethyl-4-(4-fluorophenyl)-6-phenylpyridin-3-yl]ethyl]-4-hydroxyoxan-2-one Chemical compound C([C@H](O)C1)C(=O)OC1CCC=1C(CC)=NC(C=2C=CC=CC=2)=CC=1C1=CC=C(F)C=C1 PNHBRYIAJCYNDA-VQCQRNETSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229940125872 compound 4d Drugs 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920007019 PC/ABS Polymers 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
Abstract
The application discloses a shell of an air-medium ultrasonic transducer, and relates to the field of transducers. The specific implementation scheme is as follows: the sound window is arranged at the bottom of the cylindrical barrel, the cylindrical barrel and the sound window form an integrated shell with an accommodating space, and the sound window is an ultrasonic welding film piece or a laser welding film piece. The ultrasonic welding film piece or the laser welding film piece is used as an acoustic window, and is welded to the bottom of the cylindrical barrel in an ultrasonic welding or laser welding mode. The ultrasonic welding film sheet or the laser welding film sheet is a plastic sheet produced in a large area, and is welded at the bottom of the cylindrical barrel in an ultrasonic welding or laser welding mode, so that the whole acoustic window is uniform, the thickness consistency is extremely high, and additional machining or polishing treatment is not needed.
Description
Technical Field
The application relates to the technical field of transducers, in particular to a shell of a gas-medium ultrasonic transducer.
Background
The housing of the air-dielectric ultrasonic transducer is generally cylindrical, with one end closed and the other end open, and is made of plastic materials, such as PC, ABS, PC/ABS alloy, PVDF, PTFE, PET and the like. The bottom of the closed end has a film called an acoustic window, and for a long time, the shaping or processing of the acoustic window has been one of the pain points in the manufacture of transducers in the industry. At present, the common practice at home and abroad is to firstly mold the acoustic window into a thick thickness, such as 1-3mm, then to thin the thickness into a desired value through machining, and because of introducing the machining process, the acoustic window obtained in this way is easy to have the defect of uneven thickness of a single piece (for example, 5 points are used for measuring a center point and 4 circumference points, 5 different thickness measurement values can be usually obtained), and the tolerance between batches is larger, generally larger than +/-0.05mm.
In the actual production process, some manufacturers choose to pre-process the shell into a finished part for later use, and some manufacturers choose to machine the transducer after the assembly is completed, and the two methods have a process of processing, measuring, re-processing and re-measuring, so that the final tolerance range of +/-0.015mm can be achieved, and otherwise, the consistency of the transducer cannot be ensured. The process is time-consuming and labor-consuming, is unfavorable for improving the production efficiency, and the center frequency of the finished product can be greatly fluctuated, for example, the center frequency range can be +/-4 percent (even +/-5 percent) in the specifications of transducers of the same row at home and abroad, and the main reason is the tolerance of the acoustic window of the shell.
Disclosure of Invention
Based on the above, the application provides a shell of an air-medium ultrasonic transducer for solving the problem that the acoustic window is uneven in thickness and large in tolerance.
The application provides a housing of an air-dielectric ultrasonic transducer, comprising:
the sound window is arranged at the bottom of the cylindrical barrel, the cylindrical barrel and the sound window form an integrated shell with an accommodating space, and the sound window is an ultrasonic welding film piece or a laser welding film piece.
The thickness of the acoustic window is 0.1-0.7mm.
The integrated shell with the accommodation space is closed at one end and is open at the other end, and the open end is connected with the instrument end.
The perimeter of the sound window is the same as the perimeter of the closed end of the cylindrical barrel.
And external threads for on-site installation or fixation of the transducer are arranged on the outer wall of the opening end of the cylindrical barrel.
The accommodating space accommodates a transducer assembly therein.
The transducer assembly comprises a matching layer, a piezoelectric sheet and a back lining, wherein the matching layer, the piezoelectric sheet and the back lining are sequentially assembled in the accommodating space from bottom to top, and the back lining is further arranged between the cylindrical barrel and the matching layer and the piezoelectric sheet.
The transducer assembly further includes a potting adhesive disposed within the receiving space.
The beneficial effects are that: the application discloses a shell of an air-medium ultrasonic transducer, and relates to the field of transducers. The specific implementation scheme is as follows: the sound window is arranged at the bottom of the cylindrical barrel, the cylindrical barrel and the sound window form an integrated shell with an accommodating space, and the sound window is an ultrasonic welding film piece or a laser welding film piece. The ultrasonic welding film piece or the laser welding film piece is used as an acoustic window, and is welded to the bottom of the cylindrical barrel in an ultrasonic welding or laser welding mode. The ultrasonic welding film sheet or the laser welding film sheet is a plastic sheet produced in a large area, and is welded at the bottom of the cylindrical barrel in an ultrasonic welding or laser welding mode, so that the whole acoustic window is uniform, the thickness consistency is extremely high, and additional machining or polishing treatment is not needed.
It should be understood that the description of this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
The drawings are for better understanding of the present solution and do not constitute a limitation of the present application. Wherein:
FIG. 1 is a block diagram of an integrated housing according to the present application;
FIG. 2 is a cross-sectional view of an integrated housing according to the present application;
fig. 3 is a schematic view of an integrated housing and meter assembly according to the present application.
Detailed Description
Exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
As shown in fig. 1-3, the present application provides a housing for an air-dielectric ultrasonic transducer, comprising:
the sound window 2 is arranged at the bottom of the cylindrical barrel 1, the cylindrical barrel 1 and the sound window 2 form an integrated shell with an accommodating space 3, and the sound window 2 is an ultrasonic welding film piece or a laser welding film piece. The acoustic window 2 is a plastic sheet produced in a large area and is welded at the bottom of the cylindrical drum 1 by adopting an ultrasonic welding or laser welding mode.
Preferably, the acoustic window 2 has a thickness of 0.1-0.7mm. The thickness of the acoustic window 2 depends on the working frequency of the transducer, generally not more than one tenth of the wavelength of the ultrasonic wave emitted by the transducer, and the acoustic window 2 is thin and uniform, so that a good foundation is provided for the air-medium ultrasonic transducer to emit the ultrasonic wave smoothly. The air-medium ultrasonic transducer has the function of transmitting and receiving ultrasonic waves, is generally used for detecting liquid level or material level in the field of metering instruments, converts input electric energy into ultrasonic waves to be sent out, receives returned signals after a certain time interval, and can detect liquid level or material level by calculating the time difference between transmitting and receiving ultrasonic signals.
The integral shell with the accommodation space 3 is closed at one end and is open at the other end, and the open end is connected with the instrument end.
The perimeter of the acoustic window 2 is the same as the perimeter of the closed end of the cylindrical barrel 1.
Furthermore, the ultrasonic welding film sheet or the laser welding film sheet is welded to the bottom of the cylindrical barrel in an ultrasonic welding or laser welding mode, and the transducer housing with good integration degree can be obtained in the mode, so that the acoustic window 2 is uniform in whole and extremely high in thickness consistency, and additional processing or polishing treatment is not needed.
An external thread 5 for on-site installation or fixation of the transducer is arranged on the outer wall of the open end of the cylindrical barrel 1.
In addition, the inner wall design of the open end of the cylindrical barrel 1 is various, and structures such as threads, screws, buckles and the like can be arranged to be connected with the matching structure of the instrument end.
The accommodation space 3 accommodates a transducer assembly 4 therein.
The transducer assembly 4 comprises a matching layer 4a, a piezoelectric sheet 4b and a backing 4c, the accommodating space 3 is sequentially provided with the matching layer 4a, the piezoelectric sheet 4b and the backing 4c from bottom to top, and the backing 4c is further arranged between the cylindrical barrel 1 and the matching layer 4a and the piezoelectric sheet 4 b.
The pouring sealant 4d may be directly injected between the cylindrical tube 1 and the matching layer 4a or the piezoelectric sheet 4b without providing the backing 4 c.
Further, the piezoelectric sheet 4b is led out from two wires, a voltage pulse is given to the piezoelectric sheet 4b, and the piezoelectric sheet 4b vibrates and emits ultrasonic waves through the matching layer 4a and the acoustic window 2.
Because the acoustic impedance difference between the piezoelectric sheet 4b and the acoustic window 2 is very large, the acoustic wave can generate strong reflection when directly passing through the interface, so that a matching layer 4a needs to be added between the piezoelectric sheet and the acoustic window 2 to realize the matching between the piezoelectric sheet and the acoustic window 2, and the electric energy can be converted into the acoustic wave energy to the maximum extent and emitted into the air.
The piezoelectric sheet 4b can realize the mutual conversion of the electric signal and the acoustic signal according to the special piezoelectric effect, and is a core component of the ultrasonic probe. The piezoelectric sheet 4b vibrates upon receiving the electric signal, thereby generating an acoustic signal.
The backing 4c is used to absorb the acoustic energy generated by the vibration of the piezoelectric sheet 2 and prevent the acoustic energy from being reflected and transmitted to the piezoelectric sheet 4b again to cause interference.
The transducer assembly 4 further comprises a potting compound 4d, the potting compound 4d being placed in the receiving space 3.
Still further, the potting adhesive 4d can not only strengthen the integrity of the matching layer 4a, the piezoelectric sheet 4b, and the backing 4c, but also strengthen the resistance of the matching layer 4a, the piezoelectric sheet 4b, and the backing 4c to external impact and vibration.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A housing for an air-dielectric ultrasonic transducer, comprising:
the sound window comprises a cylindrical barrel (1) and a sound window (2), wherein the sound window (2) is arranged at the bottom of the cylindrical barrel (1), the cylindrical barrel (1) and the sound window (2) form an integrated shell with an accommodating space (3), and the sound window (2) is an ultrasonic welding film piece or a laser welding film piece.
2. The housing of an air-dielectric ultrasonic transducer of claim 1, wherein: the thickness of the acoustic window (2) is 0.1-0.7mm.
3. A housing for an air-dielectric ultrasonic transducer according to claim 1 or 2, wherein: one end of the integrated shell with the accommodating space (3) is closed, the other end of the integrated shell is open, and the open end is used for being connected with an instrument end.
4. The housing of an air-dielectric ultrasonic transducer of claim 2, wherein: the circumference of the sound window (2) is the same as the circumference of the closed end of the cylindrical barrel (1).
5. The housing of an air-dielectric ultrasonic transducer of claim 4, wherein: an external thread (5) for on-site installation or fixation of the transducer is arranged on the outer wall of the opening end of the cylindrical barrel (1).
6. The housing of an air-dielectric ultrasonic transducer of any one of claims 1, 2, 4, 5, wherein: the accommodating space (3) accommodates a transducer assembly (4).
7. The housing of an air-dielectric ultrasonic transducer of claim 6, wherein: the transducer assembly (4) comprises a matching layer (4 a), a piezoelectric sheet (4 b) and a back lining (4 c), wherein the matching layer (4 a), the piezoelectric sheet (4 b) and the back lining (4 c) are sequentially assembled in the accommodating space (3) from bottom to top, and the back lining (4 c) is further arranged between the cylindrical barrel (1) and the matching layer (4 a) and the piezoelectric sheet (4 b).
8. The housing of an air-dielectric ultrasonic transducer of claim 7, wherein: the transducer assembly (4) further comprises a pouring sealant (4 d), and the pouring sealant (4 d) is placed in the accommodating space (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321793499.7U CN220258617U (en) | 2023-07-10 | 2023-07-10 | Shell of gas-medium ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321793499.7U CN220258617U (en) | 2023-07-10 | 2023-07-10 | Shell of gas-medium ultrasonic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220258617U true CN220258617U (en) | 2023-12-29 |
Family
ID=89299931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321793499.7U Active CN220258617U (en) | 2023-07-10 | 2023-07-10 | Shell of gas-medium ultrasonic transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220258617U (en) |
-
2023
- 2023-07-10 CN CN202321793499.7U patent/CN220258617U/en active Active
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