In-situ heat measuring device

By designing an in-situ thermal measurement device, including tensile and measurement parts, the problem of in-situ stress-thermal properties testing in the prior art is solved, and efficient and accurate fiber thermal properties testing is achieved, and sample damage is avoided.

CN222896014UActive Publication Date: 2025-05-23UNIV OF SCI & TECH OF CHINA
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Patent Information

Application Number
CN202420571449.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-20
Publication Date
2025-05-23
Estimated Expiration
2034-03-20

AI Technical Summary

Technical Problem

The prior art cannot achieve in-situ stress-thermal properties testing, it is inefficient and unreliable, and non-in-situ testing methods are prone to damage samples and affect the test results.

Method used

An in-situ thermal measuring device is designed, including a tensile part, a measuring part and a processor. The tensile part applies tensile stress to the fiber to be measured, the measuring part heats one end of the fiber through the first thermal measuring part and obtains the temperature, the second thermal measuring part obtains the temperature at the other end of the fiber, and the processor calculates the thermal conductivity.

Benefits of technology

It realizes the acquisition of both end temperatures while the fiber is stretched, improves the testing efficiency and accuracy, avoids irreversible damage to the sample, and reduces stress state changes and damage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an in-situ thermal measurement device, and relates to the technical field of thermal measurement, the device comprises a stretching part, a measurement part and a processor, and the measurement part comprises a first thermal measurement part and a second thermal measurement part. The stretching part applies stretching stress to the measured fiber, meanwhile, the first heat measuring part heats the first end of the measured fiber and obtains the temperature of the first end of the measured fiber, the second heat measuring part obtains the temperature of the second end of the measured fiber, and the processor obtains the heat conductivity coefficient of the measured fiber based on the temperature of the first end and the temperature of the second end. Therefore, the device can obtain the temperatures of the two ends of the tested fiber during stretching, can obtain the heat conductivity coefficients of the tested fiber under different stretching stresses, realizes the in-situ stress-thermophysical property test of the tested fiber, does not need to promote the tested fiber to generate mechanical deformation and carry out secondary transfer, and is simple in structure and convenient to operate. The test is efficient and the result is more accurate and reliable.
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Claims

1. An in-situ thermal measurement device, characterized in that: include: A stretching part, wherein the stretching part applies a tensile stress to the fiber under test; The measuring part includes a first heat measuring part and a second heat measuring part; when the stretching part applies a tensile stress to the measured fiber, the first heat measuring part heats the first end of the measured fiber and obtains the temperature of the first end of the measured fiber, and the second heat measuring part obtains the temperature of the second end of the measured fiber; wherein when the first heat measuring part heats the measured fiber, heat is transferred from the first end of the measured fiber to the second end; A processor is provided for obtaining the thermal conductivity of the fiber under test based on the temperature of the first end and the temperature of the second end of the fiber under test.

2. The in-situ thermal measurement device according to claim 1, characterized in that: The stretching part comprises: a first driving beam and a second driving beam, and the measuring part is located between the first driving beam and the second driving beam; The first driving beam applies a tensile stress to the first end of the fiber under test; The second driving beam applies a tensile stress to the second end of the measured fiber; The tensile stress applied by the first drive beam is equal to the tensile stress applied by the second drive beam.

3. The in-situ thermal measurement device according to claim 2, characterized in that: The stretching portion further includes: a first electrode and a second electrode; The first electrode is electrically connected to the first driving beam, and applies a first electrical signal to the first driving beam, so that the first driving beam applies a tensile stress to the first end of the measured fiber; The second electrode is electrically connected to the second driving beam and applies a second electrical signal to the second driving beam, so that the second driving beam applies tensile stress to the second end of the measured fiber.

4. The in-situ thermal measurement device according to claim 2, characterized in that: The first driving beam comprises a first supporting beam and a second supporting beam, one end of the first supporting beam and one end of the second supporting beam are connected to form a first driving beam of a first preset shape; wherein the first supporting beam extends along a first direction, the second supporting beam extends along a second direction, the first direction and the second direction have a preset angle, the value range of the preset angle is 0° to 180°, excluding the endpoint value, and the first preset shape is convex in a direction away from the measuring portion; wherein the first direction and the second direction are parallel to the plane where the measuring portion is located; The second driving beam includes a third support beam and a fourth support beam, one end of the third support beam and one end of the fourth support beam are connected to form a first driving beam of a second preset shape, the second preset shape is the same as the first preset shape, and the second driving beam is symmetrically arranged with the first driving beam.

5. The in-situ thermal measurement device according to claim 4, characterized in that: The stretching part also includes: a first support beam, wherein one end of the first support beam is fixed to a junction area between the first support beam and the second support beam, and the other end of the first support beam is fixed to the first thermal measurement portion; A second supporting beam, one end of the second supporting beam is fixed to the connecting area of ​​the third supporting beam and the fourth supporting beam, and the other end of the second supporting beam is fixed to the second thermal measurement part.

6. The in-situ thermal measurement device according to claim 5, characterized in that: The stretching part also includes: a first heat-insulating beam, one end of the first heat-insulating beam being fixed to the first supporting beam, and the other end of the first heat-insulating beam being fixed to the first heat-measuring portion, the first heat-insulating beam suppressing heat transfer between the first heat-measuring portion and the first supporting beam; A second thermal insulation beam, one end of the second thermal insulation beam is fixed to the second support beam, and the other end of the second thermal insulation beam is fixed to the second heat measurement portion, and the second thermal insulation beam suppresses heat transfer between the second heat measurement portion and the second support beam.

7. The in-situ thermal measurement device according to claim 6, characterized in that: The first thermal measurement part comprises: a first supporting film, wherein the first supporting film is fixed to one end of the first thermal insulation beam; a first temperature sensor, the first temperature sensor being located on the first supporting film, heating the first end of the measured fiber and acquiring the temperature of the first end of the measured fiber; The second thermal measurement part comprises: a second supporting film, wherein the second supporting film is fixed to one end of the second thermal insulation beam; A second temperature sensor is located on the second supporting film to obtain the temperature of the second end of the measured fiber.

8. The in-situ thermal measurement device according to claim 7, characterized in that: The thickness of the first supporting film is equal to the thickness of the second supporting film.

9. The in-situ thermal measurement device according to claim 7, characterized in that: The first temperature sensor is a platinum resistance temperature sensor, and the second temperature sensor is a platinum resistance temperature sensor.

10. The in-situ thermal measurement device according to claim 7, characterized in that: The first heat measurement part further includes a first cantilever beam, the first cantilever beam supports the first temperature sensor; the first cantilever beam also transmits a first signal to the first temperature sensor to heat the first end of the measured fiber and obtain the temperature of the first end of the measured fiber; The second heat measurement part also includes a second cantilever beam, which supports the second temperature sensor; the second cantilever beam also transmits a second signal to the second temperature sensor to obtain the temperature of the second end of the measured fiber.