Traceable temperature measurement probe structure and traceable calibration method thereof

By combining the four-wire connection method of platinum resistance thermometers with phase change materials, and utilizing the constant temperature characteristics of phase change materials, temperature traceability calibration under aging conditions of platinum resistance thermometers was achieved, solving the accuracy problem of temperature measurement over long service periods and realizing high-resolution, high-accuracy temperature measurement.

CN115808253BActive Publication Date: 2026-06-16SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2021-09-14
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Over long periods of use, temperature measurement results are susceptible to aging of platinum resistance thermometers, leading to decreased accuracy. Furthermore, in applications such as tunnels, mines, deep seas, and satellites, disassembling and calibrating temperature sensing elements is difficult or costly.

⚗Method used

By employing a four-wire platinum resistance thermometer and phase change material, and taking advantage of the constant temperature characteristic of the phase change material during phase change, the platinum resistance thermometer is excited by a constant current source and combined with a flexible heating element to achieve temperature traceability calibration, eliminate the influence of wire resistance and thermoelectric potential, and avoid disassembling the device.

🎯Benefits of technology

It achieves long service life, high resolution, and high accuracy temperature measurement, eliminates temperature drift caused by aging, and eliminates the need to disassemble components for calibration.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a traceable temperature measuring probe structure and a traceable calibration method thereof, and the structure is composed of a probe mechanical structure, a phase change material, a flexible heating sheet and a platinum resistance; the phase change material is encapsulated in a hollow cylinder on the probe mechanical structure; the flexible heating sheet is attached to the outer surface of the hollow cylinder on the probe mechanical structure, and the flexible heating sheet is connected to a power supply through two wires to perform heating operation; the platinum resistance is arranged in a groove directly below the hollow cylinder on the probe mechanical structure, and four-wire method is adopted to perform temperature measurement operation. The temperature measuring probe structure is suitable for long-term and high-precision application occasions, and has the advantages that the measurement result can be calibrated according to the definition of international temperature scale, the temperature measuring probe structure does not need to be disassembled, and the drift of the temperature measurement result caused by the performance change of the platinum resistance and the temperature measurement electronics part is weakened.
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