Design of High Precision Earth-Temperature Detection System

Abstract:

Based on platinum resistance as temperature medium, according to the measurement precision requirements during geothermal testing process, optimize the circuit design and segmented curve fitting were used, discussed the feasibility of realize high precision temperature detection. Combined with high precision temperature measurement circuit, through the single chip microcomputer control, segmented curve fitting the temperature sampling value, get the corresponding D-t curve, and compensate the nonlinear relationship of platinum resistance in the practical work, to achieve the purpose of accurate measurement of the temperature.

• Periodical: Applied Mechanics and Materials (Volumes 427-429)
• Pages: 640-643
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.427-429.640
• Online since: September 2013
• Authors: Yan Li, Xiao Hua Sun, Fu Shun Wang
• Keywords: High Precision, Platinum Resistance, Segmented Curve Fitting, Temperature Detection

References

[1] Wu Qi-zhong, etc. Experiment of Soil Thermal Diffusivity in Cities [J]. Journal of Atmospheric and Environmental Optics, 2007, 2(4): 257-262.

[2] Yu Ming-zhi, Fang Zhao-hong. A Method for the On-site Testing of Average Thermo-physical Parameters of Underground Rock Soil [J]. Journal of Engineering for Thermal Energy and Power, 2002(17): 489-492.

[3] Xue Qing-hua. The Study of Temperature Measuring Technology of Multichannel and High Accuracy [D]. Wuhan: Huazhong University of Science and Technology press, (2007).

[4] Yi Xian-jun, Wen Xiao-ling, Liu Cui-mei. Study of high-precision temperature measurement based on platinum resistance [J]. Transducer and Microsystem Technologies, 2009, 28(1): 49-51.

[5] Yang Yong-zhu. Linear Compensation for Platinum Resistance Thermometers with High Accuracy and Its Realization in Intelligent Instruments [J]. Instrument Technique and Sensor, 2000(8): 44-46.