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Coupling agent for detecting ultrasonic properties of masonry cultural relics

A technology for couplant and cultural relics, which is applied in the direction of material analysis, measuring device, and instrument using sonic/ultrasonic/infrasonic waves. It can solve problems such as couplant residues, and achieve the effects of easy removal, good sound conduction effect, and good water solubility.

Inactive Publication Date: 2019-04-12
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a couplant material suitable for ultrasonic detection of masonry cultural relics, so as to solve the existing problem of couplant residue in the detection of masonry cultural relics

Method used

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  • Coupling agent for detecting ultrasonic properties of masonry cultural relics
  • Coupling agent for detecting ultrasonic properties of masonry cultural relics
  • Coupling agent for detecting ultrasonic properties of masonry cultural relics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The content tested in this embodiment is the longitudinal wave velocity of Beijing Fangshan marble. The instrument used is PunditPL-200PE ultrasonic detector made in Switzerland. Spread polyvinyl alcohol liquid glue evenly on the transducer with a frequency of 250kHz, use the transducer to contact the test surface of the marble test block, and use the penetrating through method to test its propagation time. Use a vernier caliper to measure the distance between the centers of the two transducers. After the test, quickly wipe the test surface with a cotton ball soaked in pure water.

Embodiment 2

[0022] The content tested in this embodiment is the longitudinal wave velocity from certain sandstone and marble cultural relics in the Old Summer Palace in Beijing. The instrument used in this embodiment is the PunditPL-200PE ultrasonic detector produced in Switzerland. First, use a fine-bristled brush to remove impurities from the cultural relic test points. Then, mark two points with chalk on the artifact as two ultrasonic test points. Next, use a 3D laser scanner to scan the cultural relic, select two ultrasonic test points on the 3D map, and measure the distance between the two points. Finally, apply polyvinyl alcohol liquid glue evenly on the transducer, use the center of the transducer to closely contact the test point marked on the cultural relic, and use the same-side direct wave method to test the longitudinal wave velocity. After the test, quickly wipe the test surface with a cotton ball soaked in pure water.

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Abstract

The invention relates to a coupling agent material for detecting ultrasonic properties of masonry cultural relics, in particular to liquid glue with the main component of polyvinyl alcohol. Accordingto the coupling agent material, the defects of butter and vaseline which serve as a coupling agent can be avoided, and the coupling agent material has the advantages of low cost, water solubility (easy to remove), good acoustic conductance effect and the like.

Description

technical field [0001] The invention relates to an ultrasonic coupling agent for detecting masonry cultural relics. Background technique [0002] In the field of masonry cultural relics protection in our country, ultrasonic detection technology has had many achievements and applications. By observing and analyzing the wave velocity, amplitude, and waveform of ultrasonic waves in the medium, it is of great significance to analyze the physical and mechanical properties, weathering degree, and structural characteristics of masonry cultural relics. [0003] When the ultrasonic wave travels, it will reflect when it encounters an interface with a large difference in impedance, thereby reducing the sound energy. The role of the coupling agent is to reduce the attenuation of the ultrasonic wave at the interface between the transducer and the material to be tested. The couplant used in the detection of masonry cultural relics requires not only good ultrasonic penetration and coupli...

Claims

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Application Information

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IPC IPC(8): G01N29/28
CPCG01N29/28
Inventor 陈晓鹏张中俭申佳妮
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)