Device for measuring metal linear expansion coefficient by using optical fiber displacement sensor

By using a combination of optical fiber displacement sensor, heat pipe assembly and elastic fixture in the metal wire expansion coefficient measurement device, the problem of inadequate positioning and support of the metal rod to be tested is solved, and a more accurate and reliable measurement of the metal wire expansion coefficient is achieved.

CN222689677UActive Publication Date: 2025-03-28HENAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202421056436.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-03-28
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

In the prior art, the positioning and support of the metal rod to be tested is not in place, resulting in large measurement errors, especially when the vertical state of the metal rod is difficult to ensure.

Method used

An optical fiber displacement sensor is used to combine the heat-homogenization tube assembly and the elastic fixture. The heat-homogenization tube assembly is heated and maintained through the heat-homogenization tube assembly. The elastic fixture is used to elastically support the metal rod to be tested to ensure its centering and vertical state, thereby reducing experimental errors.

Benefits of technology

It effectively reduces experimental errors, ensures the centralized and vertical state of the metal rod to be tested, and makes the measurement of the expansion coefficient of the metal line more accurate and reliable.

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Abstract

The utility model discloses a device for measuring a metal linear expansion coefficient by using an optical fiber displacement sensor, relates to the technical field of metal linear expansion coefficient measuring equipment, and solves the problems that in the prior art, a metal bar to be measured is not positioned and supported in place, and experimental errors are easy to occur. The device comprises a base, a soaking pipe assembly is vertically arranged on the base, a plurality of elastic fixing pieces used for supporting a metal bar to be detected are fixedly arranged in the soaking pipe assembly, a support is arranged on the base, and an optical fiber displacement sensor used for being matched with the upper end of the metal bar to be detected is adjustably arranged on the support. According to the device, the plurality of elastic supporting pieces are arranged in the soaking pipe assembly, so that the metal piece to be tested placed in the soaking pipe assembly can be elastically supported, the centering and vertical states of the metal rod to be tested can be maintained, centering positioning and supporting are realized, and experimental errors are avoided or reduced.
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