期刊
MEASUREMENT
卷 187, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2021.110248
关键词
Dew point; Humidity sensitive thin film; LabVIEW; Relative humidity; Thermal effect
资金
- National Nature Science Fund of China [11674109]
- Science and Technology Project of Guangzhou City in China [201607010096]
A novel dew point measurement method using a temperature sensor covered by humidity sensitive thin film has been developed. The automatic measurement system based on LabVIEW has advantages of simple device and anti-interference. Experimental data showed satisfactory results with less than 1% RH deviations.
A novel dew point measurement method has been developed by using a temperature sensor covered by humidity sensitive thin film (referred as HSTF). The measurement mechanism is that the mutation of the temperature-time curve caused by the thermal effect of the HSTF can be used to detect dew points. The automatic measurement system of dew point and relative humidity (RH) based on LabVIEW is built. Compared with the existing dew point detection methods, the technique has the advantages of simple device and anti-interference. The experimental data were compared with the reference values with the satisfactory results, relative humidity deviations are less than 1%, the working range is 0-30 degrees C within 25-85% humidity environment and the maximum response time are less than 65 s which can be further shortened by software. The research provides an effective way for the construction of a simple and automatic dew point measurement system.
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