Title: High precision intelligent platinum thermal resistance temperature sensor with correction function
Application Number: 200610124976 Application Date: 2006.11.09
Publication Number: 1952632 Publication Date: 2007.04.25
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01K7/18;G01K7/21;G01K7/42
Applicant(s) Name: Naval University of Engineering, PLA Address:
Inventor(s) Name: Ye Xiaohui;Zhang Sen;Wu Yuanyuan
Attorney & Agent: liuzhi ju
Abstract:
    The invention supplies a high-accuracy intelligent platinum resistance thermometer which has correction feature, it comprises platinum resistance and signal modulation circuit, the platinum resistance (1) is connected with the interface circuit of the sensor (3) via the signal modulation circuit (2), EEPROM(5) is connected with the interface circuit of the sensor (3) via the I2C bus (4), the identification information, correction feature information and analog output level information are all stored in the EEPROM. The correction engine used by correction feature information is the initial value positioning and square root correction, platinum resistance is Pt100, the method of initial value positioning is measuring the resistance value individually at the condition of choosing three reference temperatures, and calculating the temperature t with the quadratic approximation square root correction method based on relational expression between temperature and resistance of the platinum resistance Pt100.
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