Title :
Research on temperature channel calibration of data-acquisition unit of automatic weather station
Author :
Xiangjuan, Wu ; Wenhua, Lv ; Hongyan, Xing ; Yingquan, Zou
Author_Institution :
Jiangsu Technol. & Eng. Center of Meteorol. Sensor Network, Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China
Abstract :
A method of utilizing active resistance network to calibrate the temperature channel of data-acquisition unit is proposed in this paper. This method changes gate-source voltage by micro-controller so as to simulate the resistance. Compares resistance value measured by data-acquisition unit with the simulated resistances to calibrate the performance of the data-acquisition unit. Take DT50 data-acquisition unit in CAWS600 AWS for an example. By software commands, output current and A/D sample duration time of the data-acquisition unit temperature channel are changed to resolve the problem of parameters mismatch, then this data-acquisition unit is calibrated effectively. The experiment result shows this approach provide a reliable means to calibrate AWS data-acquisition unit.
Keywords :
calibration; data acquisition; meteorological instruments; microcontrollers; A/D sample duration time; CAWS600 AWS; DT50 data acquisition unit; active resistance network; automatic weather station; gate-source voltage; microcontroller; output current; temperature channel calibration; Calibration; Electrical resistance measurement; Resistance; Resistors; Software; Temperature distribution; Temperature measurement; AWS; active resistance network; calibration; data-acquisition unit; temperature;
Conference_Titel :
Electronic Measurement & Instruments (ICEMI), 2011 10th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8158-3
DOI :
10.1109/ICEMI.2011.6037795
