CN215339663U - Ultrasonic detection transducer capable of measuring pressure - Google Patents
Ultrasonic detection transducer capable of measuring pressure Download PDFInfo
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- CN215339663U CN215339663U CN202121750163.3U CN202121750163U CN215339663U CN 215339663 U CN215339663 U CN 215339663U CN 202121750163 U CN202121750163 U CN 202121750163U CN 215339663 U CN215339663 U CN 215339663U
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Abstract
The utility model discloses an ultrasonic detection transducer capable of measuring pressure, which comprises a piezoelectric wafer for measuring pressure, an ultrasonic transducer, a transducer shell, a sound absorption material filled in the transducer shell and a wedge embedded in the sound absorption material; the back of the ultrasonic transducer is attached to the wedge, a damping block is arranged on the back of the ultrasonic transducer, and the ultrasonic transducer is connected with a connector arranged outside a shell of the ultrasonic transducer; the piezoelectric wafer for measuring the pressure is positioned on the bottom surface of the rear part of the wedge and is connected with a digital display pressure gauge arranged outside the shell of the transducer. The utility model realizes the basic functions of the ultrasonic detection transducer, and simultaneously adopts the piezoelectric effect of the piezoelectric wafer to quantify the pressure of the transducer, standardize the working process of ultrasonic detection and improve the quality control of ultrasonic detection.
Description
Technical Field
The utility model relates to a device, in particular to an ultrasonic detection transducer capable of measuring pressure, which quantifies the pressure of the transducer by adopting the piezoelectric wafer direct piezoelectric effect while realizing the basic function of the ultrasonic detection transducer, standardizes the working process of ultrasonic detection and improves the quality control of ultrasonic detection.
Background
In order to realize quality control in the ultrasonic detection process, a reference block is generally required to be used for calibrating scanning sensitivity before detection, and the detection sensitivity is required to be rechecked after the detection process is finished. NB/T47013.3-2015 No. 3 bearing equipment nondestructive testing: the regulation of ultrasonic detection is that the detection system is rechecked when the adjustment of a probe, a coupling agent and an instrument changes, the scanning range or scanning sensitivity is suspected to change, the continuous work is carried out for more than 4 hours and the work is finished, if the scanning sensitivity is reduced by 2dB in the detection range, all detection parts from the last rechecking are rechecked, and if the scanning sensitivity is increased by 2dB, all recorded signals are recalibrated. The difference between the requirements for the calibration and review of the test system compared to ASME v-2004 is that ASME v-2004 requires the test personnel to review the test system for replacement, which is more critical to the impact of the personnel on the test system. This is because the sound transmission effect is affected by the thickness of the coupling layer in the conventional ultrasonic detection process, and when the thickness of the coupling layer is an integral multiple of half the wavelength or is very thin, the sound transmission effect is improved, and the reflection echo of the same regular reflector is improved. When there is a difference between the calibration sensitivity and the rechecking sensitivity, the probe pressure can be increased artificially, and the thickness of the coupling layer can be reduced to meet the standard requirement. Therefore, human operability between the standard requirement and the actual execution is large, and the quality control of the ultrasonic detection process is affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, improve the quality control of the ultrasonic detection process and aim at the characteristic that the pressure of a probe influences the echo amplitude in the ultrasonic detection process, the utility model provides the pressure-measurable ultrasonic detection transducer which can monitor the pressure of the probe, control the change of the echo amplitude of a reflector in a certain range and standardize the ultrasonic detection working process in the calibration, working and rechecking processes.
The utility model is realized by adopting the following technical scheme:
an ultrasonic detection transducer capable of measuring pressure comprises a piezoelectric wafer for measuring pressure, an ultrasonic transducer, a transducer shell, a sound absorption material filled in the transducer shell and a wedge embedded in the sound absorption material;
the back of the ultrasonic transducer is attached to the wedge, a damping block is arranged on the back of the ultrasonic transducer, and the ultrasonic transducer is connected with a connector arranged outside a shell of the ultrasonic transducer;
the piezoelectric wafer for measuring the pressure is positioned on the bottom surface of the rear part of the wedge and is connected with a digital display pressure gauge arranged outside the shell of the transducer.
The utility model is further improved in that the top of the wedge is shaped like a horn.
The utility model is further improved in that when ultrasonic detection is carried out, the ultrasonic detector is connected with the ultrasonic probe through the connector and is connected with the ultrasonic transducer through a lead.
The present invention is further improved in that the piezoelectric wafer for pressure measurement employs a positive piezoelectric effect for converting a pressure applied to the ultrasonic probe into an electric current through the piezoelectric wafer for pressure measurement.
The utility model is further improved in that the ultrasonic probe is in transverse wave oblique incidence, longitudinal wave oblique incidence, surface wave or creeping wave, and the piezoelectric wafer for pressure measurement is positioned at the bottom of the probe without sound field interference.
A further development of the utility model is that the ultrasonic transducer is connected by means of a cable to a connector arranged outside the transducer housing.
The utility model is further improved in that the piezoelectric wafer for pressure measurement is connected with a digital display pressure gauge arranged outside the transducer shell through a piezoelectric wafer cable.
The utility model is further improved in that the digital display pressure gauge has a zero calibration function and displays that the pressure is zero when not in use.
The utility model has at least the following beneficial technical effects:
the utility model provides an ultrasonic detection transducer capable of measuring pressure, wherein a piezoelectric wafer for measuring pressure is arranged at the bottom of a probe, when different pressures are applied to the probe for detection, the piezoelectric wafer for measuring pressure generates currents with different magnitudes under different pressures under the positive piezoelectric effect, and the values of the currents are displayed on a digital display pressure gauge through a piezoelectric wafer cable for measuring pressure.
Specifically, the pressure of the probe is quantified and recorded by a digital display pressure gauge during calibration by the same or different operators, and the interference of the pressure of the probe on the amplitude of the echo is eliminated by using the pressure during calibration during the working process or rechecking process, so that the quality control of the ultrasonic detection process is achieved.
Drawings
FIG. 1 is a perspective view of a transducer;
FIG. 2 is a front view of the transducer;
FIG. 3 is a left side view of the transducer;
FIG. 4 is a top view of the transducer.
Description of reference numerals:
1 represents a piezoelectric wafer for pressure measurement;
2 represents a piezoelectric wafer cable for measuring pressure;
3 represents a digital display pressure gauge;
4 represents an ultrasonic transducer;
5 represents a damping block;
6 represents a linker;
7 represents a wedge;
and 8 represents a sound absorbing material.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
It should be understood that the embodiments described herein are merely for illustrating and explaining the present invention and are not to be construed as limiting the present invention, and the following description will be given by taking a transverse wave oblique incidence ultrasonic transducer as an example.
In the present invention, unless otherwise specified, terms of orientation such as "upper", "lower", "left" and "right" are generally used to describe with reference to the direction in fig. 1.
In the utility model, the size information of each part is not fixed, and the reasonable planning can be carried out by referring to the working requirement during use.
As shown in fig. 1, the present invention provides an ultrasonic testing transducer capable of measuring pressure, which comprises 8 parts: the pressure measuring device comprises a piezoelectric wafer 1 for pressure measurement, a piezoelectric wafer cable 2 for pressure measurement, a digital display pressure gauge 3, an ultrasonic transducer 4, a damping block 5, a connector 6, a wedge 7 and a sound absorbing material 8.
As shown in fig. 1, the sound absorbing material 8 is filled in the transducer housing, and the sound absorbing material is selected according to the probe process and can be cork, silicone grease, and the like.
As shown in fig. 1, the inclined edge of the wedge 7 has a certain inclination angle with respect to the horizontal plane, the inclination angle range should be selected according to the wave pattern requirement, and the top of the wedge 7 is in the shape of a horn, and is integrally embedded in the sound-absorbing material 8.
As shown in fig. 1, the ultrasonic transducer 4 is attached to the wedge 7, and a damping block 5 is disposed on the back of the ultrasonic transducer 4, and the ultrasonic transducer 4 is connected to the connector 6 through a cable.
As shown in fig. 1, when performing ultrasonic detection, the ultrasonic detector is connected to the ultrasonic probe through the connector 6, and is connected to the ultrasonic transducer 4 through a wire.
As shown in figure 1, the piezoelectric wafer 1 for pressure measurement is positioned on the bottom surface of the rear part of the wedge 7 and is connected with the digital display pressure gauge 3 through a piezoelectric wafer cable 2, the piezoelectric wafer 1 for pressure measurement adopts a positive piezoelectric effect, when an ultrasonic probe is pressurized, a current is generated, and the current displays the pressure on the digital display pressure gauge 3 through the cable.
Examples
And (3) emptying the ultrasonic probe, zeroing the logarithmic display pressure gauge, then placing the ultrasonic probe on the surface of a reference block and applying a certain pressure to manufacture DAC and AVG/DGS curves. In the ultrasonic detection and defect quantification processes, the reading of the digital display pressure gauge 3 is observed, the pressure equal to the curve is kept as much as possible, and the missing detection and defect quantification deviation caused by the difference of the pressure applied by the probe are reduced.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. An ultrasonic testing transducer capable of measuring pressure is characterized by comprising a piezoelectric wafer (1) for measuring pressure, an ultrasonic transducer (4), a transducer shell, a sound absorption material (8) filled in the transducer shell, and a wedge (7) embedded in the sound absorption material (8);
the back of the ultrasonic transducer (4) is attached to the wedge (7), the back of the ultrasonic transducer (4) is provided with a damping block (5), and the ultrasonic transducer (4) is connected with a joint (6) arranged outside the shell of the transducer;
the piezoelectric wafer (1) for measuring the pressure is positioned on the bottom surface of the rear part of the wedge (7) and is connected with a digital display pressure gauge (3) arranged outside the shell of the transducer.
2. A ultrasonic transducer for detecting measurable pressure according to claim 1 wherein the top of the wedge (7) is formed in a horn shape.
3. Ultrasonic testing transducer of measurable pressure according to claim 1 characterized in that the ultrasonic tester is connected to the ultrasonic probe through the connector (6) and connected to the ultrasonic transducer (4) through the wire during ultrasonic testing.
4. A pressure measurable ultrasonic testing transducer as claimed in claim 3, characterized in that the piezoelectric wafer for pressure measurement (1) employs a positive piezoelectric effect for converting the pressure applied to the ultrasonic probe into a current through the piezoelectric wafer for pressure measurement (1).
5. A pressure measurable ultrasonic testing transducer as claimed in claim 3, wherein the ultrasonic probe is of transverse wave oblique incidence, longitudinal wave oblique incidence, surface wave or creeping wave, and the piezoelectric wafer (1) for pressure measurement is located at the bottom of the probe where no sound field interference exists.
6. A ultrasound transducer for pressure measurement as claimed in claim 1, characterized in that the ultrasound transducer (4) is connected by means of a cable to a connector (6) arranged outside the transducer housing.
7. The ultrasonic testing transducer capable of measuring pressure according to claim 1, characterized in that the piezoelectric wafer (1) for measuring pressure is connected with a digital display pressure gauge (3) arranged outside the transducer shell through a piezoelectric wafer cable (2).
8. The ultrasonic testing transducer of claim 1, wherein the digital display pressure gauge has a zero calibration function and displays zero pressure when not in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121750163.3U CN215339663U (en) | 2021-07-29 | 2021-07-29 | Ultrasonic detection transducer capable of measuring pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121750163.3U CN215339663U (en) | 2021-07-29 | 2021-07-29 | Ultrasonic detection transducer capable of measuring pressure |
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| Publication Number | Publication Date |
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| CN215339663U true CN215339663U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121750163.3U Active CN215339663U (en) | 2021-07-29 | 2021-07-29 | Ultrasonic detection transducer capable of measuring pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615591A (en) * | 2022-08-16 | 2023-01-17 | 哈尔滨工业大学 | Multi-crystal-element air coupling transducer, planar stress ultrasonic measurement method thereof, computer and storage medium |
-
2021
- 2021-07-29 CN CN202121750163.3U patent/CN215339663U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615591A (en) * | 2022-08-16 | 2023-01-17 | 哈尔滨工业大学 | Multi-crystal-element air coupling transducer, planar stress ultrasonic measurement method thereof, computer and storage medium |
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