CN213240031U - Curved surface self-adaptation ultrasonic probe - Google Patents
Curved surface self-adaptation ultrasonic probe Download PDFInfo
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- CN213240031U CN213240031U CN202021839650.2U CN202021839650U CN213240031U CN 213240031 U CN213240031 U CN 213240031U CN 202021839650 U CN202021839650 U CN 202021839650U CN 213240031 U CN213240031 U CN 213240031U
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Abstract
The utility model discloses a curved surface self-adaptation ultrasonic transducer, including the casing, the lateral wall bottom of casing is equipped with a plurality of holding chambeies along the even spaced apart of circumference, and every holding intracavity all cooperates every stock solution chamber of gliding stock solution chamber and same holding intracavity top to be provided with all to be connected with the spring from top to bottom, and the common intercommunication in bottom in a plurality of stock solution chambers has the liquid bag, is provided with ultrasonic wave in the casing and takes place the mechanism, and the bottom center that ultrasonic wave took place the mechanism is connected with and wears out to the liquid bag in bottom and fixed sound-penetrating needle with it downwards. The utility model ensures the matching of the probe transmitting surface and the curvature of the workpiece by arranging the liquid sac which can adapt to workpieces with different surface shapes, thereby achieving the best coupling state; meanwhile, the thickness of the central part of the liquid sac is fixed through the sound-transmitting needle, so that the propagation path of the ultrasonic sound beam before contacting the workpiece is indirectly fixed, and the sound beam deflection and the sound beam attenuation in the liquid sac are both intrinsic parameters, thereby excluding uncertain factors and ensuring the detection effect.
Description
Technical Field
The utility model belongs to the technical field of industrial equipment detects-ultrasonic testing equipment, concretely relates to curved surface self-adaptation ultrasonic transducer.
Background
In engineering practice, it is often necessary to detect the remaining defects of various devices such as pipelines and pressure vessels during the manufacturing and installation stages and the formation and expansion of new defects after the devices are subjected to the action of temperature, load and the like during the use process, so as to ensure the safe operation of the devices, and therefore, the devices can be regularly and relatively detected. Among many detection means, ultrasonic detection is widely applied due to its advantages of high detection speed, high sensitivity, environmental friendliness, wide application range of materials and the like. However, the ultrasonic detection effect depends on the surface geometry of the object to be detected to a great extent, and the ideal detection effect can be ensured only if the sound beam generated by the piezoelectric wafer well enters the workpiece to be detected, so that the emission surface of the probe should be attached to the surface of the workpiece to the greatest extent. Therefore, a flat surface is the most ideal detection surface condition, and a curved surface (especially a curved surface with non-fixed curvature) is the least favorable for the development of detection work. In the engineering practice, curved surfaces such as pipelines (small-diameter pipes and the like), pressure vessels, special-shaped parts and the like are more common.
At present, a special ultrasonic probe is generally customized for a curved surface with fixed curvature, so that the emitting surface of the probe is matched with the curvature of a workpiece, the emitting surface of the probe is well attached to the surface of the workpiece, and the optimal coupling state is achieved; for a curved surface with a non-fixed curvature, a customized probe with a similar curvature is adopted for detection, and sometimes a plurality of curvature probes need to be equipped simultaneously to detect a workpiece comprehensively. However, customizing a specialized curved probe, even multiple probes at the same time, has a number of disadvantages:
1. the cost for customizing the probe is high, and the manufacturing period is long;
2. the customized probe needs to know the actual structure of the workpiece to be detected in advance (usually the design specification is known, and the design specification and the actual specification have certain in and out, so the probe is customized according to the design specification, and the actual detection is only approximate to curvature), and the field detection is carried out again after the customization is finished, which takes labor and time;
3. the approximate curvature probe does not reach the optimal coupling state, and the detection effect is not good enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a curved surface self-adaptation ultrasonic transducer has solved current ultrasonic transducer and has been difficult to reach the problem of best coupling state with the work piece in real time.
The utility model adopts the technical proposal that: the utility model provides a curved surface self-adaptation ultrasonic probe, includes the casing, and the lateral wall bottom of casing is equipped with a plurality of holding chambeies along circumference evenly spaced apart, and gliding stock solution chamber about every holding intracavity all cooperates and is provided with, and every stock solution chamber all is connected with the spring with same holding intracavity top, and the bottom in a plurality of stock solution chambers communicates jointly has the liquid bag, is provided with ultrasonic wave in the casing and takes place the mechanism, and the bottom center that ultrasonic wave took place the mechanism is connected with wears out downwards to the liquid bag in the bottom and fixed sound-transmitting needle with it.
The utility model is also characterized in that,
the ultrasonic wave generating mechanism comprises a sound-transmitting wedge located at the center of the bottom end in the shell, the sound-transmitting wedge is fixed to the top end of the sound-transmitting needle, a piezoelectric wafer is fixed to the top end of the sound-transmitting wedge through a damping block, the center of the bottom end of the piezoelectric wafer is opposite to the bottom end of the sound-transmitting needle, and the piezoelectric wafer is connected with an external ultrasonic detector through a cable extending out of the shell.
The difference between the liquid impedance in the liquid sac and the impedance of the sound-transmitting wedge is not more than 4.53 multiplied by 106g/cm2·s。
The ultrasonic generating mechanism in the shell is filled with sound absorbing material.
The outer surface of the liquid bag is coated with a protective film, and the thickness of the protective film is not more than 1 mm.
The length of the sound-transmitting needle is not more than 10 mm.
The utility model has the advantages that: the utility model relates to a curved surface self-adaptation ultrasonic probe, through setting up the liquid sac that can adapt to different surface shape work pieces, thereby guarantee the probe transmitting surface and match with the work piece camber, reach the best coupling state; meanwhile, the thickness of the central part of the liquid sac is fixed through the sound-transmitting needle, so that the propagation path of the ultrasonic sound beam before contacting the workpiece is indirectly fixed, and the sound beam deflection and the sound beam attenuation in the liquid sac are both intrinsic parameters, thereby excluding uncertain factors and ensuring the detection effect.
Drawings
Fig. 1 is a schematic structural diagram of a curved surface self-adaptive ultrasonic probe according to the present invention;
fig. 2 is a state diagram of the curved surface self-adaptive ultrasonic probe of the present invention attached to a planar workpiece.
In the figure, 1, a shell, 2, an accommodating cavity, 3, a liquid storage cavity, 4, a spring, 5, a liquid bag, 6, a sound transmission needle, 7, a sound transmission wedge, 8, a damping block, 9, a piezoelectric wafer, 10, a cable, 11, an external ultrasonic detector, 12, a sound absorption material and 13, a protective film.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a curved surface self-adaptation ultrasonic transducer, as shown in figure 1, including casing 1, the lateral wall bottom of casing 1 is equipped with a plurality of holding chambeies 2 along the even spaced apart a plurality of holding chambeies of circumference, gliding stock solution chamber 3 about all the cooperation is provided with in every holding chamber 2, every stock solution chamber 3 all is connected with spring 4 with the top in same holding chamber 2, the common intercommunication in bottom of a plurality of stock solution chambeies 3 has sac 5, protective film 13 has been laid to sac 5's surface, be provided with ultrasonic wave generating mechanism in the casing 1, ultrasonic wave generating mechanism's intussuseption is filled with sound absorbing material 12 in the casing 1, ultrasonic wave generating mechanism's bottom central connection has the sound penetrating needle 6 of wearing out to sac 5 in bottom and fixing with it downwards.
The ultrasonic wave generating mechanism comprises a sound-transmitting wedge 7 positioned at the center of the inner bottom end of the shell 1, the sound-transmitting wedge 7 is fixed with the top end of the sound-transmitting needle 6, a piezoelectric wafer 9 is fixed at the top end of the sound-transmitting wedge 7 through a damping block 8, the center of the bottom end of the piezoelectric wafer 9 is right opposite to the bottom end of the sound-transmitting needle 6, and the piezoelectric wafer 9 is connected with an external ultrasonic detector 11 through a cable 10 extending out of the shell 1.
Wherein the difference between the impedance of the liquid in the liquid sac 5 and the impedance of the sound-transmitting wedge 7 is not more than 4.53×106g/cm2S. The thickness of the protective film 13 does not exceed 1 mm. The length of the sound-transmitting needle 6 is not more than 10 mm.
When in use, in a natural state, as shown in figure 1, the spring 4 naturally extends to push the liquid storage cavities 3 at two sides to move downwards, and the lower surface of the liquid bag 5 is a curved surface with two low sides and a high middle part because the central point of the liquid bag is fixed. Under the curved surface state, in the process that the probe is close to the workpiece, the end points on two sides of the liquid bag 5 contact the surface of the workpiece firstly, the probe and the workpiece are continuously attached until the central part of the liquid bag 5 is attached to the workpiece, the spring 4 is partially compressed until the central part of the liquid bag 5 and the end points on two sides are both attached to the surface of the workpiece, other parts are attached to the workpiece along the same direction, as shown in fig. 2 (the workpiece is a plane), liquid in the liquid bag 5 is discharged to the liquid storage cavity 3, and the spring 4 can be compressed to enable the liquid storage cavity 3 to move upwards along the accommodating cavity 2 in the process of storing the liquid, so that balance is. Then, an external ultrasonic detector 11 energizes the piezoelectric wafer 9 through a cable 10 to enable the piezoelectric wafer to generate ultrasonic waves, the damping block 8 fixes the position of the piezoelectric wafer 9 on the sound-transmitting wedge 7, the ultrasonic sound beam is refracted by the sound-transmitting wedge 7 and the liquid bag 5, the exit point of the main sound beam is located at the position of the sound-transmitting needle 6 at the center of the bottom end of the liquid bag 5, so that the propagation path of the ultrasonic sound beam before contacting a workpiece is indirectly fixed, and the sound beam deflection and the sound beam attenuation in the liquid bag 5 are both intrinsic parameters, thereby eliminating the influence of the change of the shape and the thickness of the liquid bag 5 on the attenuation and the deflection of the ultrasonic sound beam when the ultrasonic sound beam passes through, and ensuring the detection effect.
In this way, the utility model discloses a curved surface self-adaptation ultrasonic transducer, through setting up the liquid bag 5 that can adapt to different surface shape work pieces to guarantee that the probe transmitting surface matches with the work piece camber, reach the best coupling state; meanwhile, the thickness of the central part of the liquid bag 5 is fixed through the sound-transmitting needle 6, so that the propagation path of the ultrasonic sound beam before contacting a workpiece is indirectly fixed, and the sound beam deflection and the sound beam attenuation in the liquid bag 5 are inherent parameters, thereby eliminating uncertain factors and ensuring the detection effect.
Claims (6)
1. The utility model provides a curved surface self-adaptation ultrasonic probe, a serial communication port, including casing (1), a plurality of holding chambeies (2) have been seted up along the even interval of circumference in the lateral wall bottom of casing (1), gliding stock solution chamber (3) about all cooperating in every holding chamber (2) to be provided with, every stock solution chamber (3) and same holding chamber (2) interior top all are connected with spring (4), the bottom of a plurality of stock solution chambers (3) communicates jointly has liquid bag (5), be provided with ultrasonic wave generation mechanism in casing (1), ultrasonic wave generation mechanism's bottom center is connected with and wears out downwards to bottom in liquid bag (5) and fixed sound penetrating needle (6) with it.
2. The curved surface self-adaptive ultrasonic probe according to claim 1, wherein the ultrasonic generating mechanism comprises an acoustic transmission wedge (7) positioned at the center of the bottom end in the shell (1), the acoustic transmission wedge (7) is fixed with the top end of the acoustic transmission needle (6), the top end of the acoustic transmission wedge (7) is fixed with a piezoelectric wafer (9) through a damping block (8), the center of the bottom end of the piezoelectric wafer (9) is opposite to the bottom end of the acoustic transmission needle (6), and the piezoelectric wafer (9) is connected with an external ultrasonic detector (11) through a cable (10) extending out of the shell (1).
3. The curved surface adaptive ultrasonic probe according to claim 2, wherein the difference between the impedance of the liquid in the liquid sac (5) and the impedance of the sound-transmitting wedge (7) is not more than 4.53 x 106g/cm2·s。
4. The curved surface adaptive ultrasonic probe according to claim 2, wherein the ultrasonic generating mechanism in the shell (1) is filled with sound absorbing material (12) outside.
5. The curved surface self-adaptive ultrasonic probe according to claim 1, wherein a protective film (13) is coated on the outer surface of the liquid sac (5), and the thickness of the protective film (13) is not more than 1 mm.
6. A curved adaptive ultrasound probe according to claim 1, wherein the length of the sonotrode (6) is not more than 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021839650.2U CN213240031U (en) | 2020-08-28 | 2020-08-28 | Curved surface self-adaptation ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021839650.2U CN213240031U (en) | 2020-08-28 | 2020-08-28 | Curved surface self-adaptation ultrasonic probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213240031U true CN213240031U (en) | 2021-05-18 |
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ID=75902834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021839650.2U Expired - Fee Related CN213240031U (en) | 2020-08-28 | 2020-08-28 | Curved surface self-adaptation ultrasonic probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213240031U (en) |
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2020
- 2020-08-28 CN CN202021839650.2U patent/CN213240031U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210518 Termination date: 20210828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |