Method and system for calibrating relative humidity

• Main Authors: ZHENG LANHAO, WU ZHENWEN, QIAN LISEN
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

The relative humidity calibration method comprises the steps that a current temperature and humidity sensor obtains the temperature of t DEG C and the relative humidity value of RH through measurement; the corrected relative humidity value is RHfix = RH * E (t + delta t)/E (t), E (t) refers to the saturated water pressure intensity when the temperature is t, E (t + delta t) refers to the saturated water pressure intensity when the temperature is t + delta t, and delta t refers to the estimated temperature difference range value. According to the invention, the deviation of relative humidity caused by temperature rise can be effectively corrected, and the calibration precision is good. Actual measurement data shows that the original average error is more than 10%, and the average error can be controlled to be about 1.7% after calibration of the method. The cost is low, complex design does not need to be added to the structure, and the product requirement is met under the condition that the precision requiremen