基于CMBUS总线高精度智能温度变送器开发

Design of High-precision Hmart Temperature Transmitter Based on CMBUS

传统的一体化温度变送器,国内外没有统一的精度表达,在-50~200℃范围内极限测温精度±0.45℃,然而,±0.45℃的测温精度已远远不能满足相关行业对测温精度的要求。因此,本文提出了的一种基于CMBUS总线高精度智能温度变送器的研究,该研究对提高测温精度、发展我国现场总线技术具有重要的意义。本文首先介绍了温度传感器的相关基本理论,详细分析了CMBUS总线的控制端和设备端的实现原理,分析了常温变补偿修正算法的原理;其次,对CMBUS总线高精度智能温度变送器进行了总体设计,分析了该变送器的软硬件设计要求,并设计了系统的各个功能模块;最后,对系统的硬软件做了详细设计与实现。

Traditional integral temperature transmitter, no uniform accuracy expression at home and abroad, at-50-200℃ within the limit temperature accuracy ±0.45 degrees Celsius, however, ±0.45℃ temperature accuracy is far from adequate to meet industry requirements for temperature measurement accuracy. Therefore, this paper presents a high-accuracy intelligent temperature transmitter based on CMBUS bus research, the study to improve the measurement accuracy, the development of fieldbus technology in China is of great significance. This paper introduces the basic theory of the temperature sensor, detailed analysis of the CMBUS principle of the control and equipment sides of the bus, analyzes ambient temperature correction algorithm of variable compensation principle; Secondly, the CMBUS bus high accuracy intelligent temperature transmitter design and analyzes the hardware and software design of the transmitter requires, and designed the functional modules of the system. Finally, the system hardware and software design and implementation in detail.