Hardware design of rapid assessment system for refrigeration ability in refrigerator

DONG Ming, GU Jiangping, SHEN Xi, HUANG Yuejin, JIN Huaqiang
(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: In order to reduce the time of testing the refrigeration ability in refrigerator, the rapid assessment system was developed. Aiming at this system, the hardware configuration of the system and the relevant hardware circuits were introduced. PT thermalresistance temperature sensor was used. The chip XTR105 was applied to convert temperature to current and make linearity compensation to thermalresistance temperature. The MCU MSP430 with lowpower and high performance was adopted to convert A to D for temperature and data transmission was finished rapidly and accurately between industrial computer and each working position through the CAN bus. The testing results indicate that the system can judge of the refrigeration ability in refrigerator rapidly and accurately.
Key words: refrigeration ability; rapid assessment; PT thermalresistance; controller area network(CAN) bus