Temperature Calibration Method and System Based on Photon Statistical Distribution Detection
CN121702580BActive Publication Date: 2026-05-26NATIONAL INSTITUTE OF METROLOGY CHINA
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NATIONAL INSTITUTE OF METROLOGY CHINA
- Filing Date
- 2026-02-12
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing technologies make it difficult to perform high-precision in-situ calibration of online temperature sensors in complex equipment or closed systems, resulting in a decrease in measurement accuracy.
Method used
A temperature calibration method based on photon statistical distribution detection is adopted. By utilizing the phase change of the mixture in the first temperature sensing probe, combined with a coherent light source and a photon number-resolved detection system, in-situ calibration of the second temperature sensing probe is achieved.
Benefits of technology
It enables high-precision calibration of the online temperature sensor without disassembling it, improving the accuracy and convenience of temperature measurement.
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Smart Images
Figure CN121702580B_ABST
Abstract
This disclosure relates to the field of in-situ calibration technology for temperature sensors, specifically providing a temperature calibration method and system based on photon statistical distribution detection. The system includes a first temperature sensing probe, an optical detection system, and a second temperature sensing probe. Both probes are placed in the same application environment. The first temperature sensing probe includes a cavity containing a mixture comprising a first component and a second component with different refractive indices. The first component can undergo a solid-liquid phase transition, and its phase transition temperature is used as a reference temperature. The optical detection system includes a coherent light source and a photon number-resolved detection system. The emitted light from the coherent light source is incident on the mixture, and the photon number-resolved detection system detects the emitted light passing through the mixture to determine the change in photon statistical distribution characteristics during the phase transition. The second temperature sensing probe responds to the temperature of the application environment, measures the temperature to be calibrated when the photon statistical distribution changes, and calibrates based on the reference temperature.
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