CN214097284U - A System for Determining Ultrasonic Shear Wave Attenuation Coefficient at Different Temperatures - Google Patents
A System for Determining Ultrasonic Shear Wave Attenuation Coefficient at Different Temperatures Download PDFInfo
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- CN214097284U CN214097284U CN202022605936.0U CN202022605936U CN214097284U CN 214097284 U CN214097284 U CN 214097284U CN 202022605936 U CN202022605936 U CN 202022605936U CN 214097284 U CN214097284 U CN 214097284U
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- 238000001514 detection method Methods 0.000 description 3
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Abstract
本实用新型公开了一种测定不同温度下超声横波衰减系数的系统，包括超声横波换能器、测定试块、数据处理器、超声仪器及温控箱，超声横波换能器设置于测定试块一端的端面上，测定试块的另一端为阶梯状结构，所述阶梯状结构位于温控箱内，超声横波换能器与超声仪器相连接，超声仪器与数据处理器相连接，该系统能够准确测量超声横波在不同工件及温度下的衰减系数。
The utility model discloses a system for measuring the attenuation coefficient of ultrasonic shear waves at different temperatures, comprising an ultrasonic shear wave transducer, a measurement test block, a data processor, an ultrasonic instrument and a temperature control box. The ultrasonic shear wave transducer is arranged on the measurement test block. On the end face of one end, the other end of the test block is a stepped structure, the stepped structure is located in the temperature control box, the ultrasonic transverse wave transducer is connected with the ultrasonic instrument, and the ultrasonic instrument is connected with the data processor. The system can Accurately measure the attenuation coefficient of ultrasonic shear waves at different workpieces and temperatures.
Description
Technical Field
The utility model relates to a system for survey attenuation coefficient, concretely relates to system for survey ultrasonic transverse wave attenuation coefficient under different temperatures.
Background
Ultrasonic transverse waves are widely applied to ultrasonic detection, and play an irreplaceable role in ultrasonic detection of welded joints and pipes. Ultrasonic energy attenuation occurs when ultrasonic waves propagate in a medium due to beam spreading, grain scattering, and absorption by the medium. Wherein the attenuation caused by grain scattering and medium absorption is prevalent during ultrasonic wave propagation. In addition, dislocations, magnetic domain walls, residual stress, and the like in the propagation medium also cause attenuation of the ultrasonic wave. Obtaining the attenuation coefficient of the ultrasonic wave is of great significance for mastering the propagation characteristics of the ultrasonic wave in a medium and better utilizing the ultrasonic wave to carry out actual detection work.
At present, the attenuation coefficient of ultrasonic waves is measured by using a thin plate workpiece and a thick plate or thick cylinder workpiece, and is used for measuring the attenuation coefficient of ultrasonic longitudinal waves. For the measurement of attenuation coefficient of the thin plate, the attenuation coefficient of ultrasonic transverse wave is calculated by utilizing the amplitude difference between multiple bottom waves and the plate thickness, and the method requires that the upper surface and the lower surface of the thin plate are smooth and parallel to each other without considering diffusion attenuation. For the attenuation coefficient measurement of a thick plate or a thick cylinder, the attenuation coefficient of the ultrasonic transverse wave is calculated by using the amplitude difference between the primary bottom wave and the secondary bottom wave and the plate thickness, and the method processes the diffusion attenuation in an estimation mode. The ultrasonic energy loss caused by reflection is processed in an estimation mode by the two methods, and the determination accuracy is further improved.
In addition, the currently used method for measuring the attenuation coefficient of the ultrasonic wave mainly obtains the multiple reflection bottom wave of the ultrasonic wave which penetrates through a workpiece and reaches the bottom surface at normal temperature, the commonly used method for measuring the attenuation coefficient of the longitudinal wave at normal temperature can be partially used as the reference for measuring the attenuation coefficient of the transverse wave, but the attenuation of the ultrasonic wave at high temperature is increased, a special high-temperature ultrasonic transverse wave transducer is needed, the temperature uniformity of a part to be measured is difficult to control due to the existence of a coupling agent when the piezoelectric ultrasonic transverse wave transducer transmits and receives the ultrasonic wave, and the signal-to-noise ratio of the ultrasonic wave transmitted by the electromagnetic ultrasonic transverse wave transducer is greatly reduced. Therefore, the method commonly used at present is not suitable for measuring the attenuation coefficient of the ultrasonic transverse wave at different temperatures, particularly at high temperature.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide a system of supersound transverse wave attenuation coefficient under survey different temperatures, this system can the accurate attenuation coefficient of measurement supersound transverse wave under different work pieces and temperature.
In order to achieve the above object, the system for measuring the attenuation coefficient of ultrasonic transverse wave at different temperatures comprises an ultrasonic transverse wave transducer, a measuring test block, a data processor, an ultrasonic instrument and a temperature control box, wherein the ultrasonic transverse wave transducer is arranged on the end face of one end of the measuring test block, the other end of the measuring test block is of a step-shaped structure, the step-shaped structure is located in the temperature control box, the ultrasonic transverse wave transducer is connected with the ultrasonic instrument, and the ultrasonic instrument is connected with the data processor.
The length of the test block is 800-.
The width of each step on the test block is 30-100 mm.
The thickness of each step on the test block is 30-100 mm.
The end of the test block, on which the ultrasonic transverse transducer is arranged, is a vertical flat surface.
One end of the measuring test block, which is provided with the ultrasonic transverse transducer, is an inclined flat surface.
The end face of the stepped structure is perpendicular to the propagation direction of ultrasonic transverse waves.
The number of the ultrasonic transverse-wave transducers is 1, and the frequency of the ultrasonic transverse-wave transducers is 0.5-10 MHz.
The utility model discloses following beneficial effect has:
survey system of ultrasonic transverse wave attenuation coefficient when concrete operation, the one end of survey test block is the echelonment structure, when the test, will through the temperature control case the temperature regulation of echelonment structure part is to the temperature that awaits measuring and keep constant temperature, then utilizes ultrasonic transverse wave transducer to arouse the ultrasonic transverse wave on the terminal surface of survey test block other end to adjust echo wave amplitude to 80% full screen, record different propagation distance's gain value, then data processor can calculate and obtain ultrasonic transverse wave attenuation coefficient, then the accurate attenuation coefficient of measuring ultrasonic transverse wave under different work pieces and temperature, convenient operation, simple.
Drawings
FIG. 1 is a schematic view showing a configuration of a measuring system according to a first embodiment or a second embodiment of the present invention;
FIG. 2 is a schematic view of a measuring system according to a third embodiment of the present invention;
wherein, 1 is an ultrasonic transverse transducer, 2 is a test block, 3 is a data processor, 4 is an ultrasonic instrument, and 5 is a temperature control box.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, wherein the embodiments only show the relevant parts of the present invention, and it will be understood by those skilled in the art that the structures shown in the drawings do not constitute a limitation of the system, and may include more or less parts than those shown in the drawings.
Referring to fig. 1 and 2, system of survey ultrasonic transverse wave attenuation coefficient under different temperatures include ultrasonic transverse wave transducer 1, survey test block 2, data processor 3, ultrasonic instrument 4 and temperature control box 5, ultrasonic transverse wave transducer 1 sets up on the terminal surface of surveying test block 2 one end, and the other end of survey test block 2 is the echelonment structure, the echelonment structure is located temperature control box 5, and ultrasonic transverse wave transducer 1 is connected with ultrasonic instrument 4, and ultrasonic instrument 4 is connected with data processor 3.
The length of the test block 2 is 800-; the width of each step on the test block 2 is 30-100 mm; the thickness of each step on the test block 2 is 30-100 mm.
The end of the measuring test block 2, on which the ultrasonic transverse-wave transducer 1 is arranged, is a vertical flat surface, or the end of the measuring test block 2, on which the ultrasonic transverse-wave transducer 1 is arranged, is an inclined flat surface.
The end face of the stepped structure is perpendicular to the propagation direction of ultrasonic transverse waves.
The number of the ultrasonic transverse-wave transducers 1 is 1, and the frequency of the ultrasonic transverse-wave transducers 1 is 0.5-10 MHz.
The utility model discloses a concrete working process does:
1) regulating the temperature of the ladder-shaped structure part on the test block 2 to be lower than the temperature to be measured through a temperature control box 5, and keeping the temperature constant;
2) exciting ultrasonic transverse wave by using the ultrasonic transverse wave transducer 1, and transmitting the ultrasonic transverse wave to the stepped structure after the ultrasonic transverse wave is incident from the flat surfaceiThen the reflected wave returns to the ultrasonic transverse wave transducer 1 along the original path after being reflected by the stepped structure, the amplitude of the echo is made to be 80% of full screen by adjusting the gain of the ultrasonic instrument 4, and the gain value B at the moment is recordedi；
3) The data processor 3 calculates the ultrasonic transverse wave attenuation coefficient
Wherein liI is half of the propagation distance of the ultrasonic transverse wave, and i is 1,2, n.
The echo amplitude of the ultrasonic transverse wave is the amplitude of the echo at the peak position.
The transverse wave generation modes comprise the following modes:
the first mode is as follows: transmitting and receiving ultrasonic transverse waves by using a piezoelectric ultrasonic transverse wave transducer 1;
the second way is: exciting and receiving ultrasonic transverse waves by using an electromagnetic ultrasonic transverse wave transducer 1;
the third mode is as follows: the method comprises the steps of utilizing a piezoelectric ultrasonic transverse wave transducer 1 to emit ultrasonic longitudinal waves, generating waveform conversion by oblique incidence on a contact interface of the piezoelectric ultrasonic transverse wave transducer 1 and a test block 2, enabling the incident angle of the longitudinal waves to be between alpha I and alpha II, and finally enabling all transverse waves to be refracted in the test block 2, wherein when the ultrasonic transverse waves are generated by the waveform conversion, the included angle between the central line of the test block 2 and a flat surface and the transverse wave refraction angle at the interface are complementary angles.
In fig. 2, α, β, and γ are the incident angle of the longitudinal wave, the refraction angle of the transverse wave, and the angle between the center line of the test piece 2 and the flat side end surface, respectively.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022605936.0U CN214097284U (en) | 2020-11-11 | 2020-11-11 | A System for Determining Ultrasonic Shear Wave Attenuation Coefficient at Different Temperatures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022605936.0U CN214097284U (en) | 2020-11-11 | 2020-11-11 | A System for Determining Ultrasonic Shear Wave Attenuation Coefficient at Different Temperatures |
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| Publication Number | Publication Date |
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| CN214097284U true CN214097284U (en) | 2021-08-31 |
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| CN202022605936.0U Active CN214097284U (en) | 2020-11-11 | 2020-11-11 | A System for Determining Ultrasonic Shear Wave Attenuation Coefficient at Different Temperatures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214097284U (en) |
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2020
- 2020-11-11 CN CN202022605936.0U patent/CN214097284U/en active Active
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