A Calibration Method of Thermal Resistance Heat Flow Sensor

Abstract

The calibration method of the thermal resistance heat flow sensor includes the following steps: a) setting a heat conduction plate; b) symmetrically installing several heat flow sensors and temperature sensors on both sides of the heat conduction plate; c) the heat flow values ​​collected by each heat flow sensor , cold surface temperature and hot surface temperature Send to the heat flow-temperature inspection instrument respectively; d) The heat flow-temperature inspection instrument is based on the formula Calculate the standard heat flow value ; e) According to the formula Calculate the correction coefficient C of the heat flow value; f) When the error between the correction coefficients C of the heat flow value for consecutive N times does not exceed 1%, calculate the average value of the N correction coefficients C , and write it into the configuration file of the Heat Flow-Temperature Inspector as the final heat flow value correction factor. The calibration result is accurate, high in precision, convenient and feasible, effectively solves the problem that the heat flow instrument cannot be accurately calibrated in the thermal inspection of buildings, and improves the experimental efficiency and reliability.

Description

technical field [0001] The invention relates to a calibration method of a thermal resistance heat flow sensor, in particular to a calibration method of a thermal resistance heat flow sensor based on an absolute non-calibration heat flow sensor. Background technique [0002] The heat flow sensor is a basic tool for measuring heat transfer (heat flux density or heat flux), and is the most critical component of a heat flow meter. The accuracy of its measurement results is the most critical factor in determining the accuracy of the heat flow meter measurement results. Heat flow calibration (or calibration) technology has a relatively short history. At present, no large-scale heat flow standard for comparison has been established in the world. However, some departments engaged in the research and manufacture of heat flow sensors formulate calibration methods according to the characteristics of their products. Due to the different principles and transfer procedures, there are diff...

AI Technical Summary

Problems solved by technology

[0003] Thermal resistance heat flow sensor is a commonly used heat flow sensor at present, mostly made of rubber with a thickness of 3 mm, as well as synthetic resin materials and electroplated thermopiles, resulting in relatively high errors

Since the calibration results of the heat flow sensor are greatly affected by the calibration equipment and the external environment, such as the ambient temperature, wind speed, ambient radiation performance, and the sensor's own thickness, side length, and pressure state, etc., it brings great challenges to the calibration work. certain degree of difficulty

So far, there is no standard heat flow detection instrument at home and abroad, and there is no simple and effective calibration method for heat flow sensors.

Images