CN116371707A - Ultrasonic transducer and manufacturing method thereof - Google Patents
Ultrasonic transducer and manufacturing method thereof Download PDFInfo
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- CN116371707A CN116371707A CN202310328587.8A CN202310328587A CN116371707A CN 116371707 A CN116371707 A CN 116371707A CN 202310328587 A CN202310328587 A CN 202310328587A CN 116371707 A CN116371707 A CN 116371707A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 230000026683 transduction Effects 0.000 claims abstract description 143
- 238000010361 transduction Methods 0.000 claims abstract description 143
- 239000010410 layer Substances 0.000 claims abstract description 76
- 229920005989 resin Polymers 0.000 claims abstract description 73
- 239000011347 resin Substances 0.000 claims abstract description 73
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 239000012790 adhesive layer Substances 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims description 81
- 230000001070 adhesive effect Effects 0.000 claims description 81
- 239000003292 glue Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004382 potting Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The invention provides an ultrasonic transducer and a manufacturing method thereof, and relates to the technical field of ultrasonic transducers. The ultrasonic transducer comprises a protection tube, a transduction window is arranged on the side wall of the protection tube, an insulating layer is arranged on the inner wall of the protection tube, which is positioned at the transduction window, a transduction element is arranged on the insulating layer, and the transduction element is used for receiving an electric signal and converting the electric signal into an ultrasonic signal, sending the ultrasonic signal outwards and receiving an external ultrasonic signal and converting the ultrasonic signal into an electric signal; a transduction cable electrically connected with the transduction element is arranged in the protection tube, and the transduction cable is used for transmitting electric signals to the transduction element; the protective tube is located on the periphery of the transduction element and is wrapped with a resin adhesive layer, and the transduction element is exposed to the outside towards the side wall of the transduction window. The ultrasonic transducer can effectively inhibit noise interference of surrounding electromagnetic environment, improve signal to noise ratio of receiving and transmitting signals of the ultrasonic transducer and improve transmission distance of the signals.
Description
Technical Field
The invention relates to the technical field of ultrasonic transducers, in particular to an ultrasonic transducer and a manufacturing method thereof.
Background
In medical ultrasonic imaging equipment, an ultrasonic transducer can emit and receive ultrasonic waves, and a common ultrasonic transducer comprises a transduction element, a backing and a matching layer, wherein the transduction element is a piezoelectric device and can vibrate and emit ultrasonic waves after receiving voltage excitation, and corresponding voltage is generated between two stages of the transduction element after receiving the ultrasonic waves; the backing is used for reducing the vibration time of the transduction element, and the matching layer is used for improving the transmission efficiency of ultrasonic waves.
However, under the circumstance that the electromagnetic environment of equipment and a system is increasingly deteriorated due to factors such as the trend of the current electromagnetic spectrum becoming dense, the electromagnetic power density in unit volume is rapidly increased, high and low levels or the equipment is mixed in a large amount, and the like, the ultrasonic transducer is extremely easy to be subjected to electromagnetic interference in the environment when in use, and the normal operation of the ultrasonic transducer is influenced. Therefore, there is a need to provide a solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to provide an ultrasonic transducer and a manufacturing method thereof, which can effectively inhibit noise interference of surrounding electromagnetic environment, improve signal-to-noise ratio of receiving and transmitting signals of the ultrasonic transducer and improve transmission distance of the signals.
In a first aspect, the present invention provides an ultrasonic transducer, which adopts the following technical scheme:
the ultrasonic transducer comprises a protective tube, wherein a transduction window is arranged on the side wall of the protective tube, an insulating layer is arranged on the inner wall of the protective tube, which is positioned at the transduction window, a transduction element is arranged on the insulating layer, and the transduction element is used for receiving an electric signal, converting the electric signal into an ultrasonic signal, sending the ultrasonic signal outwards and receiving an external ultrasonic signal to convert the ultrasonic signal into an electric signal;
a transduction cable electrically connected with the transduction element is arranged in the protection tube, and the transduction cable is used for transmitting electric signals to the transduction element; the protective tube is located on the periphery of the transduction element and is wrapped with a resin adhesive layer, and the transduction element is exposed to the outside towards the side wall of the transduction window.
The ultrasonic transducer provided by the invention has the beneficial effects that: the energy conversion element is placed in the protection tube and is placed on the insulating layer, the protection tube can protect the energy conversion element, and the insulating layer is used for electrically isolating the protection tube from the energy conversion element; the periphery of the transduction element is wrapped by the resin adhesive layer, and the transduction element is exposed to the outside towards the side wall of the transduction window, so that the transduction element can be fixed, noise interference of an external magnetic field on the transduction element can be restrained, the signal-to-noise ratio of the transduction element for receiving and transmitting signals is improved, and the transmission distance of the signals is relatively improved.
Optionally, the transduction cable includes a central signal line and an insulating inner ring sequentially disposed from the center to the outside; the end part of the central signal line is positioned between the insulating layer and the transduction element, and the central signal line is electrically connected with the transduction element; the end part of the insulating inner ring is mutually adhered with the insulating layer and covered by the resin adhesive layer. The central signal line is electrically connected with the transduction element, so that the central signal line transmits electric signals, and the insulating inner ring outside the central signal line plays an insulating protection and shielding role on the central signal line, so that noise interference of an external magnetic field on signals output by the transduction element is restrained.
Optionally, the transduction cable further includes a shielding ring and an insulating outer ring, where the shielding ring and the insulating outer ring are sequentially disposed on the outer side of the insulating inner ring; the resin glue layer comprises first resin glue, first conductive glue and second resin glue, the first resin glue wraps the periphery of the transduction element, the first resin glue covers the end part of the insulating inner ring, the first conductive glue is connected with the end part of the shielding ring and the end part of the transduction element, and the second resin glue covers the first conductive glue. The shielding ring is positioned between the insulating inner ring and the insulating outer ring, can protect and isolate the shielding ring, and can further inhibit noise interference of an external magnetic field on signals output by the transduction element, so that the transmission distance of the signals is further relatively improved.
Optionally, the resin adhesive layer further includes a second conductive adhesive, the second conductive adhesive is located between the insulating layer and the transduction element, and the second conductive adhesive wraps the end portion of the central signal line, the second conductive adhesive is used for conducting and fixing the central signal line and the transduction element, and the second conductive adhesive can improve the stability of electrical connection between the central signal line and the transduction element.
In a second aspect, the present invention also provides a method for manufacturing an ultrasonic transducer, including the steps of:
s1, after the insulating layer is fixed on the inner wall of the protection tube, which is positioned at the transduction window, the transduction cable is inserted into the protection tube, so that the end part of the central signal wire is positioned at the insulating layer;
s2, placing the transduction element on the central signal line, filling the second conductive adhesive between the transduction element and the insulating layer, enabling the second conductive adhesive to wrap the end part of the central signal line, and curing the second conductive adhesive;
s3, filling the first resin glue between the transduction element and the protection tube, enabling the first resin glue to wrap the peripheral side of the transduction element, enabling the transduction element to be exposed to the outside towards the side wall of the transduction window, and curing the first resin glue;
s4, filling the first conductive adhesive at the end part of the shielding layer and the end part of the transduction element, so that the first conductive adhesive is connected with the end part of the shielding layer and the end part of the transduction element, and curing the first conductive adhesive;
s5, covering the first conductive adhesive with the second resin adhesive, and curing the second resin adhesive.
The manufacturing method of the ultrasonic transducer provided by the invention has the beneficial effects that: the insulating layer is adhered to the inner wall of the protection tube, the insulating layer plays an insulating role on the protection tube, the transduction cable is inserted into the protection tube, the end of the central signal wire is positioned at the insulating layer, the central signal wire is electrically isolated from the protection tube by the insulating layer, the transduction element is placed on the central signal wire and is filled with second conductive adhesive, and the central signal wire and the transduction element can be stably connected after the second conductive adhesive is solidified; the first resin glue is filled between the transduction element and the protection tube, and can play a further role in protecting the transduction element, and meanwhile, the transduction element is isolated from the protection tube on the outer side; after the first resin adhesive is cured, the end part of the shielding layer and the end part of the transduction element are connected by using the first conductive adhesive, the shielding layer is connected with the transduction element after curing, and then a layer of second resin adhesive is covered on the surface of the first conductive adhesive and cured, so that the first conductive adhesive is sealed and insulated, and electric leakage of the ultrasonic transducer in a medium environment is avoided.
Optionally, before executing the step S1, the following steps are executed: s0, providing a protection tube and an insulating layer, and cutting the insulating layer according to the inner wall size of the protection tube positioned in the transduction window. Cutting the insulating layer according to the inner wall size of the protection tube is beneficial to the adhesion of the insulating layer on the inner wall of the protection tube.
Optionally, the step of executing S0 includes adhering the protection tube to a transparent table surface with graduations, and aligning the protection tube with the graduations. The protective tube is used as the shell component of the transduction element in the medical ultrasonic equipment, so that the size of the protective tube is extremely small, and the protective tube is stuck on a transparent table surface with scales, thereby being beneficial to improving the position stability of the protective tube in the assembling process of the ultrasonic device.
Optionally, the insulating layer has double-sided adhesion, and the side of the insulating layer with adhesion therein is attached to the inner wall of the protection tube. The structure is favorable for pasting the insulating layer on the inner wall of the protective tube, improves the stability of the insulating layer in the protective tube, and is also favorable for pasting and fixing the insulating inner ring and the shielding ring in the transduction cable on the insulating layer.
Optionally, the step of performing the curing of the second conductive adhesive in the step S2 includes controlling the curing condition of the second conductive adhesive to be 60-80 ℃ and curing for 3-5 hours; and in the process of executing the curing of the first conductive adhesive in the step S4, controlling the curing condition of the first conductive adhesive to be 60-80 ℃ and curing for 3-5 hours.
Optionally, the step of performing the curing of the first resin glue in the step S3 includes controlling the curing condition of the first resin glue to be 20-30 ℃ for 24 hours; and (3) the process of executing the second resin adhesive in the step (S5) comprises the step of controlling the curing condition of the second resin adhesive to be 20-30 ℃ and curing for 24 hours.
Optionally, in the step S3, in the process of filling the first resin glue between the transduction element and the protection tube, the potting height of the first resin glue at the joint of the transduction element and the insulating inner ring is controlled to be 1-2mm. The method is favorable for fixing the transduction element in the protection tube, and plays a role in further fixing the transduction cable and the transduction element.
Drawings
FIG. 1 is a partial cross-sectional view of an ultrasound transducer in an embodiment of the invention;
FIG. 2 is a cross-sectional view of a cable for highlighting the transduction in an embodiment of the present invention;
fig. 3 is a flow chart of a method of fabricating an ultrasonic transducer in an embodiment of the invention.
Reference numerals illustrate:
1. a protective tube; 2. a transduction window; 3. an insulating layer; 4. a transducer element; 5. a transduction cable; 51. a center signal line; 52. an insulating inner ring; 53. a shielding ring; 54. an insulating outer ring; 6. a resin adhesive layer; 61. a first resin adhesive; 62. a first conductive adhesive; 63. a second resin adhesive; 64. and a second conductive adhesive.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and the like means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof without precluding other elements or items.
The embodiment of the invention provides an ultrasonic transducer.
Referring to fig. 1, the protective tube comprises a protective tube 1, a transduction window 2 is arranged on the side wall of the protective tube 1, the transduction window 2 is communicated with the inner cavity of the protective tube 1, and an insulating layer 3 is arranged on the inner wall of the protective tube 1, which is positioned at the transduction window 2.
In some embodiments, the protection tube 1 has a cylindrical tubular shape, and the transduction window 2 is formed on a circumferential side wall of the protection tube 1.
In some embodiments, the insulating layer 3 is quadrilateral, and the insulating layer 3 is attached to the inner wall of the protection tube 1.
In some embodiments, the protection tube 1 is provided with a placing table at the position of the transduction window 2, the placing table is arranged in a plane towards the side wall of the transduction window 2, and the insulating layer 3 is attached to the side wall of the placing table towards the transduction window 2. In some embodiments, a welded connection is used between the placement table and the protective tube 1.
In some embodiments, the insulating layer 3 is made of polyvinyl chloride.
In some embodiments, the insulating layer 3 has double-sided adhesiveness, which is beneficial to adhering the insulating layer 3 on the inner wall of the protection tube 1, and improves the convenience of installation between the insulating layer 3 and the protection tube 1.
In some embodiments, the dimensions of the insulating layer 3 are matched to the dimensions of the inner wall of the protective tube 1, thereby facilitating the fitting of the insulating layer 3 within the protective tube 1.
In some embodiments, the protective tube 1 is made of stainless steel.
In some embodiments, the outer diameter of the protection tube 1 is 1.10mm, the length is 7.00mm, and the opening size of the transduction window 2 is 5.50mm×0.60mm.
Referring to fig. 1, a protective tube 1 is provided with a transducer element 4 on an insulating layer 3, the transducer element 4 is used for receiving an electrical signal and converting the electrical signal into an ultrasonic signal to be sent out, and meanwhile, can receive an external ultrasonic signal to convert the external ultrasonic signal into the electrical signal, so that the transducer element 4 is placed in the protective tube 1, and the protective tube 1 protects the transducer element 4.
In some embodiments, the transduction element 4 is in a cuboid shape, and the transduction element 4 is arranged towards the side wall of the transduction window 2 in an inward concave arc surface, so that the transduction element 4 can send and receive ultrasonic signals to the outside.
Referring to fig. 1, a transduction cable 5 is coaxially disposed in the protection tube 1, the transduction cable 5 is electrically connected with the transduction element 4, and the other end of the transduction cable 5 is connected with an ultrasonic host system, so that the ultrasonic host system controls the transduction element 4 to emit an ultrasonic signal through the transduction cable 5, and simultaneously the transduction element 4 can receive an externally reflected ultrasonic signal and convert the ultrasonic signal into an electrical signal, and the electrical signal is transmitted to the ultrasonic host system through the transduction cable 5, thereby forming an image at the ultrasonic host system.
Referring to fig. 2, the transduction cable 5 includes a central signal line 51 and an insulating inner ring 52 sequentially disposed from the center to the outside, wherein an end of the central signal line 51 is located between the insulating layer 3 and the transduction element 4, and the central signal line 51 is electrically connected to the transduction element 4, and the ultrasonic host system is connected to the transduction element 4 through the central signal line 51, and an end of the insulating inner ring 52 is attached to the insulating layer 3 (see fig. 1 in detail).
In some embodiments, the central signal line 51 is formed from a bundle of copper wires.
In some embodiments, the inner insulating ring 52 is made of polyvinyl chloride.
Referring to fig. 2, the transduction cable 5 further includes a shielding ring 53 and an insulating outer ring 54, and the shielding ring 53 and the insulating outer ring 54 are sequentially disposed at the outer side of the insulating inner ring 52, the shielding ring 53 is disposed between the insulating inner ring 52 and the insulating outer ring 54, and the shielding ring 53 can further play a role in shielding the transduction cable 5, so that noise interference caused by an external magnetic field to an electrical signal transmitted in the central signal line 51 is avoided, and the insulating outer ring 54 protects the shielding ring 53 and plays a role in electrically isolating the shielding ring 53 from the outside.
In some embodiments, the shielding ring 53 is a metal mesh made of aluminum alloy.
In some embodiments, the outer insulating ring 54 is made of polyvinyl chloride.
Referring to fig. 1, the protective tube 1 is provided with a resin adhesive layer 6 on the circumferential side of the transducer element 4 in a wrapping manner, and the resin adhesive layer 6 includes a first resin adhesive 61, a first conductive adhesive 62 and a second resin adhesive 63, the first resin adhesive 61 is provided on the circumferential side of the transducer element 4 in a wrapping manner, and the first resin adhesive 61 covers the end of the insulating inner ring 52, so that the insulating inner ring 52 is fixed on the insulating layer 3; and the height of the first resin adhesive 61 is smaller than the height of the transduction element 4, so that the first resin adhesive 61 is positioned at the part below the top side wall of the transduction element 4, and the transduction element 4 is exposed to the outside towards the side wall of the transduction window 2, thereby avoiding the interference to the operation of the transduction element 4.
The first conductive adhesive 62 is located between the end of the shielding ring 53 and the end of the transducer element 4, and the first conductive adhesive 62 covers the surface of the first resin adhesive 61, and the first conductive adhesive 62 is used for electrically connecting the shielding ring 53 and the transducer element 4, so that the shielding ring 53 is electrically connected with the outer end of the transducer element 4, thereby further improving the suppression capability to external noise and relatively improving the signal transmission distance. The second resin adhesive 63 covers the surface of the first conductive adhesive 62, and plays a role in isolating and insulating the first conductive adhesive 62, so that when the ultrasonic transducer is used in a liquid medium, the first conductive adhesive 62 cannot generate electric leakage.
In some embodiments, the first conductive paste 62 is a thermosetting silver conductive paste or a thermosetting copper conductive paste.
In some embodiments, the first resin glue 61 and the second resin glue 63 are both acoustically transparent resins.
Referring to fig. 1, the resin adhesive layer 6 further includes a second conductive adhesive 64, and the second conductive adhesive 64 is located between the insulating layer 3 and the transducer element 4, and the second conductive adhesive 64 wraps the end of the central signal line 51, and the second conductive adhesive 64 can fix the central signal line 51 and the transducer element 4 and electrically connect them to each other.
In some embodiments, the second conductive paste 64 is a thermoset silver conductive paste or a thermoset copper conductive paste.
Referring to fig. 1 and 3, the present invention further provides a method for manufacturing an ultrasonic transducer, including the following steps:
s1, after an insulating layer 3 is fixed on the inner wall of a protection tube 1 positioned at a transduction window 2, a transduction cable 5 is inserted into the protection tube 1, so that the end part of a central signal wire 51 is positioned at the insulating layer 3;
s2, placing the energy replacing element 4 on the central signal wire 51, filling the second conductive adhesive 64 between the energy replacing element 4 and the insulating layer 3, enabling the second conductive adhesive 64 to wrap the end part of the central signal wire 51, and curing the second conductive adhesive 64;
s3, filling a first resin adhesive 61 between the transduction element 4 and the protection tube 1, enabling the first resin adhesive 61 to wrap the peripheral side of the transduction element 4, enabling the transduction element 4 to be exposed to the outside towards the side wall of the transduction window 2, and curing the first resin adhesive 61;
s4, filling first conductive adhesive 62 at the end part of the shielding layer and the end part of the transduction element 4, so that the first conductive adhesive 62 connects the end part of the shielding layer and the end part of the transduction element 4, and curing the first conductive adhesive 62;
s5, covering the second resin adhesive 63 on the first conductive adhesive 62, and curing the second resin adhesive 63.
In some embodiments, before step S1 is performed, the following steps are performed: s0, providing a protection tube 1 and an insulating layer 3, and cutting the insulating layer 3 according to the inner wall size of the protection tube 1 positioned on the transduction window 2, so that the size of the insulating layer 3 is adapted to the inner wall size of the protection tube 1, and the insulating layer 3 is more fit.
In some embodiments, before executing step S1, the process of executing step S0 includes adhering the protective tube 1 on a transparent table with graduations, and adhering the protective tube 1 aligned with the graduations, which is beneficial to maintaining the position stability and accuracy of the protective tube 1 in the manufacturing process of the ultrasonic transducer.
In some embodiments, before step S1 is performed, the step S0 is performed by providing the insulating layer 3 with double-sided adhesion, and attaching the side of the insulating layer 3 with adhesion to the inner wall of the protection tube 1 when step S1 is performed.
In some embodiments, the curing of the second conductive paste 64 in step S2 includes controlling the curing conditions of the second conductive paste 64 to be 60-80 ℃ for 3-5 hours.
In some embodiments, the curing of the first conductive adhesive 62 in step S4 includes controlling the curing condition of the first conductive adhesive 62 to be 60-80 ℃ for 3-5 hours.
In some embodiments, the step S3 of curing the first resin adhesive 61 includes controlling the curing condition of the first resin adhesive 61 to be 20-30 ℃ for 24 hours.
In some embodiments, the step S5 of curing the second resin 63 includes controlling the curing condition of the second resin 63 to be 20-30 ℃ for 24 hours.
In some embodiments, in the process of filling the first resin glue 61 between the transducer element 4 and the protection tube 1 in the step S3, the potting height of the first resin glue 61 at the connection part of the transducer element 4 and the inner ring is controlled to be 1-2mm.
While embodiments of the present invention have been described in detail hereinabove, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. It is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (11)
1. The ultrasonic transducer is characterized by comprising a protection tube, wherein a transduction window is formed in the side wall of the protection tube, an insulating layer is arranged on the inner wall of the protection tube, which is positioned at the transduction window, a transduction element is arranged on the insulating layer, and the transduction element is used for receiving an electric signal, converting the electric signal into an ultrasonic signal, sending the ultrasonic signal outwards and receiving an external ultrasonic signal, and converting the external ultrasonic signal into the electric signal;
a transduction cable electrically connected with the transduction element is arranged in the protection tube, and the transduction cable is used for transmitting electric signals to the transduction element; the protective tube is located on the periphery of the transduction element and is wrapped with a resin adhesive layer, and the transduction element is exposed to the outside towards the side wall of the transduction window.
2. The ultrasonic transducer of claim 1, wherein the transduction cable comprises a central signal line and an insulating inner ring disposed sequentially from a center to an outer side;
the end part of the central signal line is positioned between the insulating layer and the transduction element, and the central signal line is electrically connected with the transduction element;
the end part of the insulating inner ring is mutually adhered with the insulating layer and covered by the resin adhesive layer.
3. The ultrasonic transducer of claim 2, wherein the transduction cable further comprises a shielding ring and an insulating outer ring, the shielding ring and the insulating outer ring being disposed in sequence outside the insulating inner ring;
the resin glue layer comprises first resin glue, first conductive glue and second resin glue, the first resin glue wraps the periphery of the transduction element, the first resin glue covers the end part of the insulating inner ring, the first conductive glue is connected with the end part of the shielding ring and the end part of the transduction element, and the second resin glue covers the first conductive glue.
4. The ultrasonic transducer of claim 3, wherein the resin glue layer further comprises a second conductive glue, the second conductive glue is located between the insulating layer and the transduction element, and the second conductive glue wraps the end of the central signal line, and the second conductive glue is used for conducting and fixing the central signal line and the transduction element.
5. The method of manufacturing an ultrasonic transducer of claim 4, comprising the steps of:
s1, after the insulating layer is fixed on the inner wall of the protection tube, which is positioned at the transduction window, the transduction cable is inserted into the protection tube, so that the end part of the central signal wire is positioned at the insulating layer;
s2, placing the transduction element on the central signal line, filling the second conductive adhesive between the transduction element and the insulating layer, enabling the second conductive adhesive to wrap the end part of the central signal line, and curing the second conductive adhesive;
s3, filling the first resin glue between the transduction element and the protection tube, enabling the first resin glue to wrap the peripheral side of the transduction element, enabling the transduction element to be exposed to the outside towards the side wall of the transduction window, and curing the first resin glue;
s4, filling the first conductive adhesive at the end part of the shielding layer and the end part of the transduction element, so that the first conductive adhesive is connected with the end part of the shielding layer and the end part of the transduction element, and curing the first conductive adhesive;
s5, covering the first conductive adhesive with the second resin adhesive, and curing the second resin adhesive.
6. The method of manufacturing an ultrasonic transducer according to claim 5, wherein before performing S1, the following steps are performed:
s0, providing a protection tube and an insulating layer, and cutting the insulating layer according to the inner wall size of the protection tube positioned in the transduction window.
7. The method of claim 6, wherein the step of performing S0 includes adhering the protective tube to a transparent table with graduations and aligning the protective tube with the graduations.
8. The method of manufacturing an ultrasonic transducer according to any one of claims 5 to 7, wherein the insulating layer has double-sided adhesion, and a side of the insulating layer having adhesion therein is bonded to the inner wall of the protective tube.
9. The method according to claim 5, wherein the step of curing the second conductive paste in S2 includes curing the second conductive paste in an environment at 60-80 ℃ for 3-5 hours;
and in the process of executing the curing of the first conductive adhesive in the step S4, controlling the curing condition of the first conductive adhesive to be 60-80 ℃ and curing for 3-5 hours.
10. The method according to claim 5, wherein the step of curing the first resin paste in S3 includes curing the first resin paste in an environment at 20-30 ℃ for 24 hours;
and (3) the process of executing the second resin adhesive in the step (S5) comprises the step of controlling the curing condition of the second resin adhesive to be 20-30 ℃ and curing for 24 hours.
11. The method according to claim 5, wherein the potting height of the first resin adhesive at the junction of the transducer element and the insulating inner ring is controlled to be 1-2mm during the filling of the first resin adhesive between the transducer element and the protective tube in S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328587.8A CN116371707A (en) | 2023-03-30 | 2023-03-30 | Ultrasonic transducer and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310328587.8A CN116371707A (en) | 2023-03-30 | 2023-03-30 | Ultrasonic transducer and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116371707A true CN116371707A (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310328587.8A Pending CN116371707A (en) | 2023-03-30 | 2023-03-30 | Ultrasonic transducer and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116371707A (en) |
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2023
- 2023-03-30 CN CN202310328587.8A patent/CN116371707A/en active Pending
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