A DEVELOPMENT OF MICROCOMPUTER-BASED MULTICHANNEL DIGITAL THERMOMETER

In this paper, the construction and performance of the microprocessor-based multi-chan-nel digital thermometric instrument together with its deisgn and fabrication are systematicallydescribed. The principle, method and practical softwares for the entire reference-junction com-pensation processing by microcomputer and the linearization of the characteristic ofthermocouples are also exhaustively expounded with a detailed analysis of the error existing inthe thermometric instrument. The practiced result shows that the apparatus is featured with asimple construction, high accuracy and high ability of anti-disturbance. It is proved to be ofpractical value.     

智能多通道数字测温仪的研制

本文系统地介绍了智能化多通道测温仪结构性能特点和设计制造方法。文中详尽地阐述了利用微型计算机处理热电偶参比端温度全补偿和热电偶特性线性化的原理、方法和实用软件,并对测温仪的误差进行了较为详细的分析。实践结果表明该装置简单,精度高,抗干扰能力强,具有实用价值。