Acoustic characterization equipment for detecting structural characteristics of phase change material

By designing variable frequency acoustic characterization equipment and using variable frequency acoustic probe to detect the acoustic response of phase change materials, the problem of difficulty in detecting the internal structure of phase change materials in the prior art is solved, and efficient acoustic testing and structural interpretation under different temperature and pressure conditions are achieved.

CN119738477AActive Publication Date: 2025-04-01INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202411921731.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-01
Estimated Expiration
2044-12-25

AI Technical Summary

Technical Problem

Existing acoustic detection technology is difficult to effectively detect the internal structure of phase change materials under different stresses and initial water-containing conditions, and the equipment is complex in operation and high in testing costs, making it difficult to promote and apply.

Method used

A variable frequency acoustic characterization equipment is designed, using a variable frequency acoustic probe, which can excite low-frequency band frequency waves and adjust the waveform. Through this device, the attenuation characteristics and internal structural characteristics of the test material can be obtained and the evolution law of the internal structure of the material can be analyzed.

Benefits of technology

It realizes acoustic testing of phase change materials under different temperature and pressure conditions, and can perform acoustic testing of frequency changes and different waveforms without changing the acoustic probe. The test results are seamlessly connected with on-site tests, which can effectively interpret the internal structure of phase change materials.

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Abstract

The invention relates to the technical field of phase change material research, and discloses acoustic characterization equipment for detecting structural characteristics of a phase change material, which comprises a sample, a test reaction kettle, an acoustic test assembly, a temperature control assembly, a pressure control assembly and a data acquisition assembly, wherein the sample is of a cylindrical structure, and the outer side of the sample is wrapped with three layers of latex films and a layer of tinfoil; the test reaction kettle comprises a reaction kettle shell and a reaction kettle base; the two groups of acoustic testing assemblies are arranged at the upper end and the lower end of the sample and are used for emitting sound waves with different frequencies so as to obtain the attenuation characteristic and the internal structure characteristic of the tested material. Preparation and acoustic testing of phase-change materials of different structures under different temperature and pressure conditions are achieved, and compared with other equipment, the equipment can achieve acoustic testing in the phase-change process of the phase-change materials under high net confining pressure, and acoustic testing of frequency changes and different waveforms can be carried out on the premise that an acoustic probe is not replaced.
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