Device for reducing noise of ultrasonic transducer

By adding wiring posts in the ultrasonic transducer probe package, setting pins and step sealing holes, and using the matching method of positioning pins and sealing rings, the problems of noise interference and lax sealing are solved, and the recognition ability of acoustic pulses is improved and the airtightness of the equipment.

CN222353851UActive Publication Date: 2025-01-14SHANGHAI WUGUAN INSTRUMENT TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202420950710.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-06
Publication Date
2025-01-14
Estimated Expiration
2034-05-06

AI Technical Summary

Technical Problem

The existing ultrasonic transducer probe packaging has problems such as noise interference and lax sealing, resulting in metrological errors and safety hazards, and the packaging process is complex and the pass rate is low.

Method used

By adding wiring posts and setting pins at their ends, setting step sealing holes and filling them with glue, connecting the inner and outer shells with a matching method between positioning pins and sealing rings, reducing the metal contact area, increasing insulating glue to prevent water and oxidation, and The inner shell surface of the probe is provided with chamfered to avoid resonance.

Benefits of technology

It effectively reduces noise interference, improves the identification and detection capabilities of acoustic pulses, solves air leakage problems, and improves air tightness and equipment reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

A device for reducing noise of an ultrasonic transducer comprises a probe inner shell, a probe and a binding post, the probe is embedded in the left side of an inner cavity of the probe inner shell, a step sealing hole is formed in the right side of the inner cavity of the probe inner shell, the binding post is arranged on the left side of the step sealing hole, and the binding post is connected with the probe through a second pin. The binding post is connected with the ultrasonic detector through a first pin, and the binding post is hermetically connected with the inner wall of the probe inner shell through a binding post sealing ring; first insulation glue is packaged between the probe and the binding post, and second insulation glue is packaged in the step glue sealing hole. According to the utility model, the defects in the prior art are overcome, gas sealing is carried out by adding the binding post, the problem of gas leakage of a wire outlet or a shielding wire core in the glue filling and packaging process of the transducer is solved, and the inner and outer shells are connected by adding the step on the left side of the inner shell and matching the pin with the sealing ring, so that the reliability of the transducer is improved. The problem of a noise source generated by mechanical vibration is solved, so that the recognition and detection capabilities of sound pulses are improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic transducer probe packaging, in particular to a device for reducing ultrasonic transducer noise. Background Art

[0002] The existing ultrasonic transducer probe packaging technology generally adopts an integrated packaging, the main structure of which is to embed the ultrasonic probe directly into the metal shell, fix the connection and seal it by glue injection, and the surface of the outer shell contains two sealing grooves for sealing the matching assembly parts. At the same time, a thread line or a spring groove is provided in the center of the shell for disassembly of the transducer.

[0003] However, for a long time, the limitation of the application of sound wave detection technology in the air is still the ultrasonic transducer itself. Since ultrasonic waves are mechanical waves, which are generated by vibration, a part of them returns along the original path and generates an alternating electric field under the action of alternating tension and pressure, generating acoustic noise. Acoustic noise will interfere with the detection of sound pulses, thereby interfering with the measurement of propagation time, and ultimately leading to measurement errors. Secondly, during the process of probe packaging and glue filling, the transducer cannot be completely sealed due to temperature changes, glue shrinkage, and glue adhesion strength, resulting in air leakage at the outlet or the core of the shielded wire, causing leakage, which can easily lead to serious safety accidents. At the same time, there are problems such as complex glue filling and packaging processes, low pass rate, and high manufacturing costs. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a device for reducing the noise of an ultrasonic transducer, which overcomes the deficiencies of the prior art and has a reasonable design. Gas sealing is performed by adding a terminal post to solve the problem of air leakage at the outlet or the shielded wire core of the transducer during the glue filling and packaging process. At the same time, a step is added to the left side of the inner shell and the inner and outer shells are connected by a pin and a sealing ring to solve the problem of noise sources caused by mechanical vibration, thereby improving the recognition and detection capabilities of sound pulses.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A device for reducing the noise of an ultrasonic transducer comprises an inner shell of a probe, a probe and a terminal, wherein the inner shell of the probe is a cylindrical structure with left and right openings, the probe is embedded in the left side of an inner cavity of the inner shell of the probe, a step sealing hole is provided on the right side of the inner cavity of the inner shell of the probe, a terminal is provided on the left side of the step sealing hole, a second pin is provided at the input end of the terminal, the second pin is connected to the probe through a cable, a first pin is provided at the output end of the terminal, the first pin is connected to an ultrasonic detector through a cable, a terminal sealing ring is provided on the outer surface of the terminal, and the terminal is sealed and connected to the inner wall of the inner shell of the probe through the terminal sealing ring;

[0007] A first insulating glue is packaged between the probe and the terminal, and a second insulating glue is packaged in the step sealing hole.

[0008] Preferably, a probe outer shell is sleeved on the right side of the outer surface of the probe inner shell, a probe inner sealing ring is arranged on the outer surface of the probe inner shell, and the probe inner shell is sealed and connected to the probe outer shell via the probe inner sealing ring.

[0009] Preferably, a probe outer sealing ring is provided on the outer surface of the probe housing, and the probe outer housing is sealed and connected to the inside of the meter body through the probe outer sealing ring.

[0010] Preferably, a positioning groove is provided on the outer surface of the inner shell of the probe, and a positioning hole is opened on the surface of the outer shell of the probe. The positioning hole corresponds to the positioning groove, and a positioning pin is provided in the positioning hole. The positioning pin passes through the positioning hole and is connected in the positioning groove.

[0011] Preferably, the inner surface of the inner shell of the probe is provided with a chamfer, and the chamfer is located on the right side of the probe.

[0012] Preferably, the inner surface of the inner shell of the probe is provided with a first step, and the first step is on the right side of the probe.

[0013] Preferably, a threaded hole is provided on the flange on the right side of the probe outer shell.

[0014] Preferably, a second step is provided on the left side of the inner surface of the probe inner shell.

[0015] Preferably, an exhaust hole is provided on the left side surface of the inner shell of the probe.

[0016] The utility model provides a device for reducing the noise of an ultrasonic transducer. It has the following beneficial effects: by adding a terminal and setting pins at both ends of the terminal, the problem of leakage of the outlet or the shielded wire core in the process of glue filling and packaging of the probe can be solved; at the same time, a step sealing hole is set and glue filling is performed on it, so that the welding point of the first pin led out of the terminal is easily loosened and falls off, and the problem of short circuit and the like is solved, and at the same time, the entire terminal is waterproof and anti-oxidation, and then the inner and outer shells of the probe are connected by the cooperation of the positioning pin and the sealing ring inside the probe, so as to further reduce the metal contact area of ​​the inner and outer shells of the probe, thereby further isolating the noise source problem caused by mechanical vibration, and improving the recognition and detection ability of the sound pulse; secondly, by the second step on the left side of the inner surface of the inner shell of the probe, the core working area of ​​the probe and the inner shell of the probe can be avoided to contact and resonate with each other, and then evolve into a noise source to interfere with the detection of the sound pulse, and further improve the recognition and detection ability of the sound pulse; and further, by setting a chamfer on the inner surface of the inner shell of the probe, the probe can be smoothly pressed into the inner cavity of the inner shell of the probe, and the cable of the probe and the inner wall of the inner shell of the probe can be avoided to be squeezed and worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0018] Figure 1 A schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0020] Figure 3 The right side view of the utility model;

[0021] Description of the numbers in the figure:

[0022] 1. Probe outer shell; 2. Probe outer sealing ring; 3. Terminal; 4. Probe inner sealing ring; 5. Probe inner shell; 6. Probe; 7. Positioning pin; 8. Terminal sealing ring; 9. First insulating glue; 10. Exhaust hole; 11. Chamfer; 12. First step; 13. Threaded hole; 14. Step sealing hole; 15. First pin; 16. Second pin; 17. Second step; 18. Second insulating glue. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0024] Embodiment 1, as Figure 1-3 As shown, a device for reducing the noise of an ultrasonic transducer comprises a probe inner shell 5, a probe 6 and a terminal 3, wherein the probe inner shell 5 is a cylindrical structure with left and right openings, the probe 6 is embedded in the left side of the inner cavity of the probe inner shell 5, a step sealing hole 14 is provided on the right side of the inner cavity of the probe inner shell 5, a terminal 3 is provided on the left side of the step sealing hole 14, a second pin 16 is provided at the input end of the terminal 3, the second pin 16 is connected to the probe 6 through a cable, a first pin 15 is provided at the output end of the terminal 3, the first pin 15 is connected to an ultrasonic detector through a cable, a terminal sealing ring 8 is provided on the outer surface of the terminal 3, and the terminal 3 is sealed and connected to the inner wall of the probe inner shell 5 through the terminal sealing ring 8;

[0025] A first insulating glue 9 is sealed between the probe 6 and the terminal 3 , and a second insulating glue 18 is sealed in the step sealing hole 14 .

[0026] Working principle:

[0027] When in use, by setting the terminal 3, and encapsulating the first insulating glue 9 between the terminal 3 and the probe 6, and then sealing the terminal 3 and the inner shell 5 of the probe through the terminal sealing ring 8, the working area of ​​the probe 6 is sealed to achieve a sealing effect, so as to solve the leakage problem of the cable outlet port of the probe 6 during the glue filling and encapsulation process, thereby improving the air tightness of the device.

[0028] In addition, by providing the step sealing hole 14 and encapsulating the second insulating glue 18 in the step sealing hole 14, the first pin 15 of the terminal 3 can be fixed, thereby solving the problem of the welding point of the first pin 15 leading out of the terminal 3 being easily loosened and falling off, resulting in a short circuit, and the like, and also plays a waterproof and anti-oxidation role for the entire terminal 3. In this embodiment, the step sealing hole 14 is most preferably five millimeters wide.

[0029] Embodiment 2, as a further preferred solution of embodiment 1, a probe outer shell 1 is mounted on the right side of the outer surface of the probe inner shell 5, a probe inner sealing ring 4 is arranged on the outer surface of the probe inner shell 5, and the probe inner shell 5 is sealed and connected to the probe outer shell 1 through the probe inner sealing ring 4. By arranging the probe inner sealing ring 4 on the outside of the probe inner shell 5, the probe inner shell 5 is sealed and connected inside the probe outer shell 1, which reduces the metal contact area between the probe inner shell 5 and the probe outer shell 1, thereby isolating the noise source problem caused by mechanical vibration, improving the recognition and detection capabilities of the acoustic pulse, and further improving the airtightness of the probe inner shell 5 and the probe outer shell 1.

[0030] Embodiment 3, as a further preferred embodiment of embodiment 1, a probe outer sealing ring 2 is provided on the outer surface of the probe outer shell 1, and the probe outer shell 1 is sealed and connected to the meter body through the probe outer sealing ring 2. By providing the probe inner sealing ring 2 outside the probe outer shell 1, the probe inner shell 5 can be sealed and connected to the meter body, further improving the airtightness of the device.

[0031] Embodiment 4, as a further preferred solution of embodiment 1, the outer surface of the probe inner shell 5 is provided with a positioning groove, and the surface of the probe outer shell 1 is provided with a positioning hole, the positioning hole corresponds to the positioning groove, and a positioning pin 7 is provided in the positioning hole, and the positioning pin 7 passes through the positioning hole and is connected in the positioning groove. The probe inner shell 5 and the probe outer shell 1 are connected by the cooperation of the positioning pin 7 and the probe inner sealing ring 4, which further reduces the metal contact area between the probe inner shell 5 and the probe outer shell 1, thereby further isolating the noise source problem caused by mechanical vibration and improving the recognition and detection capabilities of the acoustic pulse.

[0032] Embodiment 5, as a further preferred embodiment of embodiment 1, the inner surface of the probe inner shell 5 is provided with a chamfer 11, and the chamfer 11 is located on the right side of the probe 6. By providing the chamfer 11 on the inner surface of the probe inner shell 5, when the probe 6 is pressed into the inner cavity of the probe inner shell 5, it guides the cable of the probe 6, avoids the extrusion and wear between the cable of the probe 6 and the inner wall of the probe inner shell 5, and enables the probe 6 to be smoothly pressed into the inner cavity of the probe inner shell 5. In this embodiment, the chamfer 11 is most preferably 60° and has a width of four millimeters. The four-millimeter wide glue injection area can play a quantitative role in glue injection, so that the glue injection amount can be maintained in a reasonable range.

[0033] Embodiment 6, as a further preferred embodiment of embodiment 1, the inner surface of the probe inner shell 5 is provided with a first step 12, and the first step 12 is on the right side of the probe 6. By providing the first step 12, a glue pouring area is provided for pouring the first insulating glue 9, and the position of the probe 6 can be limited.

[0034] Embodiment 7, as a further preferred solution of Embodiment 2, a threaded hole 13 is provided on the flange on the right side of the probe outer shell 1. In this embodiment, the threaded hole 13 used is a non-penetrating structure. By providing the threaded hole 13, with the cooperation of the disassembly tool, only two screws need to be screwed into the threaded hole 13, and the transducer can be quickly removed from the meter body by pulling out the screws, without damaging the probe 6 and the lead-out cable, which facilitates the replacement and disassembly of the transducer.

[0035] Embodiment 8, as a further preferred embodiment of embodiment 2, a second step 17 is provided on the left side of the inner surface of the probe inner shell 5. By providing the second step 17, the core working area of ​​the probe 6 does not directly contact the inner wall of the probe inner shell 5, thereby effectively avoiding the core working area of ​​the probe 6 and the probe inner shell 5 from contacting and resonating with each other, thereby evolving into a noise source to interfere with the acoustic pulse detection.

[0036] Embodiment 9, as a further preferred embodiment of embodiment 2, a vent hole 10 is provided on the left surface of the probe inner shell 5. By providing the vent hole 10, the gas in the probe inner shell 5 can be discharged when the probe 6 is pressed in, so that the probe 6 can be pressed in more smoothly, and at the same time, the vent hole 10 can be used to observe whether the insulating glue is poured in place.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for reducing the noise of an ultrasonic transducer, characterized in that: The invention comprises a probe inner shell (5), a probe (6) and a terminal (3), wherein the probe inner shell (5) is a cylindrical structure with holes opened on the left and right sides, the probe (6) is embedded in the left side of the inner cavity of the probe inner shell (5), a step sealing hole (14) is provided on the right side of the inner cavity of the probe inner shell (5), a terminal (3) is provided on the left side of the step sealing hole (14), a second pin (16) is provided at the input end of the terminal (3), the second pin (16) is connected to the probe (6) through a cable, a first pin (15) is provided at the output end of the terminal (3), the first pin (15) is connected to an ultrasonic detector through a cable, a terminal sealing ring (8) is provided on the outer surface of the terminal (3), and the terminal (3) is sealed and connected to the inner wall of the probe inner shell (5) through the terminal sealing ring (8); A first insulating glue (9) is encapsulated between the probe (6) and the terminal (3), and a second insulating glue (18) is encapsulated in the step sealing glue hole (14).

2. The device for reducing ultrasonic transducer noise according to claim 1, characterized in that: The outer surface of the probe inner shell (5) is sleeved with a probe outer shell (1) on the right side thereof. A probe inner sealing ring (4) is arranged on the outer surface of the probe inner shell (5). The probe inner shell (5) is sealedly connected to the probe outer shell (1) via the probe inner sealing ring (4).

3. The device for reducing ultrasonic transducer noise according to claim 2, characterized in that: The outer surface of the probe outer shell (1) is provided with a probe outer sealing ring (2), and the probe outer shell (1) is sealed and connected to the meter body via the probe outer sealing ring (2).

4. The device for reducing ultrasonic transducer noise according to claim 2, characterized in that: The outer surface of the probe inner shell (5) is provided with a positioning groove, and the surface of the probe outer shell (1) is provided with a positioning hole, the positioning hole corresponds to the positioning groove, a positioning pin (7) is provided in the positioning hole, and the positioning pin (7) passes through the positioning hole and is connected to the positioning groove.

5. The device for reducing ultrasonic transducer noise according to claim 1, characterized in that: The inner surface of the probe inner shell (5) is provided with a chamfer (11), and the chamfer (11) is located on the right side of the probe (6).

6. The device for reducing ultrasonic transducer noise according to claim 1, characterized in that: The inner surface of the probe inner shell (5) is provided with a first step (12), and the first step (12) is on the right side of the probe (6).

7. The device for reducing ultrasonic transducer noise according to claim 2, characterized in that: A threaded hole (13) is provided on the flange on the right side of the probe outer shell (1).

8. The device for reducing ultrasonic transducer noise according to claim 1, characterized in that: A second step (17) is provided on the left side of the inner surface of the probe inner shell (5).

9. The device for reducing ultrasonic transducer noise according to claim 1, characterized in that: An exhaust hole (10) is provided on the left side surface of the probe inner shell (5).