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Design of communication system in intelligent instrument based on HART protocol

机译：基于HART协议的智能仪器通信系统设计。

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摘要

At present, fieldbus has already become the hot spot in process control filed, on Behalf of the necessary trend in the development of process instrument. As the International Standard of fieldbus accomplished, the fieldbus product is surely accepted by the market for its consummate function and extrusive characteristics. Because HART realizes digital communication in the transmission of analog signals. In this paper, the design of communication module in intelligent instrument based on HART protocol is a useful attempt of HART Protocol on application of intelligent instruments. Based on the needs of the practical environment, author proposes an idea of “modularization”. For that, this design can be extensively used, and the existent products can be upgraded easily by small changes. In this paper, the design of hardware and software for HART protocol communication system was introduced and analyzed. In the aspect of hardware it introduced the system of chip selection and circuit design and in part of software the structure of system was detailed analysis and description and this paper gives some further introduction and discuss about how to realize the anti-interference of HART protocol software. In addition, the device debugging and test function is introduced at the end of this paper.
机译：目前，现场总线已成为过程控制领域中的热点，代表了过程仪表发展的必然趋势。随着国际现场总线标准的完成，现场总线产品以其完善的功能和突出的特性而无疑被市场所接受。因为HART在模拟信号的传输中实现了数字通信。本文基于HART协议的智能仪器通讯模块的设计是HART协议在智能仪器应用中的有益尝试。基于实际环境的需求，作者提出了“模块化”的思想。为此，该设计可以被广泛使用，并且现有的产品可以通过较小的更改轻松升级。本文介绍并分析了HART协议通信系统的硬件和软件设计。在硬件方面，介绍了芯片选择和电路设计系统，在软件的一部分中，对系统的结构进行了详细的分析和描述，本文对如何实现HART协议软件的抗干扰作了进一步的介绍和讨论。 。此外，本文末尾还介绍了设备调试和测试功能。

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