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A cambered acoustic waveguide device suitable for the field of ultrasonic thickness measurement

An ultrasonic wave and sound-focusing technology, which is applied in the field of arc-shaped sound-focusing waveguide devices, can solve the problems of the influence of receiving position and angle, the inability to guarantee the incident angle, and the unoptimized receiving angle, etc., and achieve the effect of reducing reflection

Active Publication Date: 2018-01-30
SHENYANG ZKWELL CORROSION CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2) There are many unfavorable factors in adopting the slender waveguide strip method
Third, the ultrasonic waves reflect back and forth in the slender waveguide strips, which cannot guarantee the incident angle when the ultrasonic waves are injected into the object under test. effect, making the fixed acceptance angle not optimal

Method used

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  • A cambered acoustic waveguide device suitable for the field of ultrasonic thickness measurement
  • A cambered acoustic waveguide device suitable for the field of ultrasonic thickness measurement
  • A cambered acoustic waveguide device suitable for the field of ultrasonic thickness measurement

Examples

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Embodiment 1

[0098] image 3 It is one of the examples described in accordance with the present invention. In practice, an arc-shaped acoustic waveguide device is used, which is divided into left and right parts, a transmitting waveguide 1 and a receiving waveguide 2 . Between the A section and the B section is a regular bar with a rectangular section shape, and all sections parallel to the A section have the same shape and size as the A and B sections. The size of the section A is adapted to the size of the circular surface of the transducer 5. In order to maximize the contact area between the incident surface of the waveguide and the circular surface of the transducer 5, it can also be made into a square section inscribed with the circular surface of the transducer 5. As shown in the figure, the diameter of the circular surface of the transducer 5 is Φ18, and the rectangular size of the A section is 12X15 (mm).

[0099] The H surface is an arc surface, which starts to bend from the B s...

Embodiment 2

[0104] In order to adapt the installation between the waveguide and the instrument, the image 3 Based on the curved surface waveguide shown, it can also be extended to such as Figure 4 The waveguide shape shown. The waveguide expands upwards from the A section, and the section shape of the extension section 7 is still a regular bar, which is the same as the A section. After the second bending, it reaches the D section. On the slope E, it is reflected by the E surface to the F surface, and after being reflected by the F surface, it becomes vertically downward and enters the A section. It is guaranteed that after the second reflection of the full-wave sound wave incident from the D surface, all the sound rays just translate to the A section, and all the sound ray travels from the D section to the A section are equal. The situation after the sound wave passes through the A section is consistent with the above-mentioned arc waveguide. The E plane and the F plane are parallel,...

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Abstract

An arc-shaped sound-gathering waveguide device suitable for the field of ultrasonic thickness measurement. Under the condition of ensuring no dispersion and fidelity of ultrasonic waves, the contact surface with the circular surface of the transducer is a wide surface, which can receive the transduced energy to the maximum extent. In the transmission process, all the received energy is transmitted to a slender rectangular narrow surface through the arc surface focusing method during the transmission process. Not only does the received ultrasonic energy not dissipate, but also at most only One reflection effectively reduces energy attenuation, and also reduces the inducing factors that cause ultrasonic dispersion or distortion. It is also suitable for connection with curved measurement surfaces such as pipes. The invention realizes the transmission of ultrasonic waves from the wide surface to the narrow surface and then back to the wide surface without loss of received energy, and solves a practical problem in the field of ultrasonic thickness measurement.

Description

technical field [0001] The invention relates to an arc surface acoustic waveguide device used in ultrasonic non-destructive testing, and is particularly suitable for testing the thickness of high-temperature pipelines and pipelines whose outer surfaces are curved surfaces. Background technique [0002] The use of ultrasonic thickness measurement is an open and transparent practical technology. The conventional method is to directly act on the surface of the measured object with an ultrasonic probe made of an ultrasonic transducer. The ultrasonic probe contains a transmitting acoustic transducer and a receiving acoustic transducer. The ultrasonic waves emitted by the transmitting acoustic wave transducer have reflected waves on the surface and inner surface of the measured object, and the external surface and inner surface reflected waves are received sequentially by the transducer used for receiving, according to the time difference between the two echoes Multiply by the sou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B17/02
Inventor 李欣波周光森杨阳杨富淋郑丽群
Owner SHENYANG ZKWELL CORROSION CONTROL TECH