Design of Cold End Self-motion Compensation of K Thermal Couple on the Basis of Single ChipWANG Ding-Jiang, WANG Dong-Feng, YANG Hou-Chuan The First Aeronautic Institute of Air Force, Xinyang Henan 464000, China Abstract:On the basis of strong function of processing data by single chip a new method of testing environmental voltage and local voltage was presented in this paper, the measuring foundation of which is simulation of experimental but not ideal formula. The design of the com- pensation system was based on the fact： the sum of two voltage is the standard voltage. Because software was used to process voltage sign, the circuit was simplified evidently. The whole design include only three part, i.e. environmental temperature testing, local voltage testing and sign processing of single chip. Meanwhile, the cost decreased remarkably. The results of emulation and experiment show that, the compensation system can make the maximum error less than 5℃.[著者文摘]
Key words:K thermal couple; cold end compensation; single chip; hot end temperature