毕业设计（论文）--基于msp430单片机的气体涡轮流量计的设计.docVIP

基于MSP430单片机的气体涡轮流量计设计 摘 要:流量测量在工业生产、能源计量、环境保护、交通运输、生物技术、军事工程和科学研究等领域占据重要位置，因此，流量测量仪表的研究和开发应用有着深远的意义。涡轮流量计是流量测量仪表中不可缺少的一员，随着现代计算机技术的发展而不断发展和完善。按照模块化设计方法，将系统硬件部分分为不同的功能模块分别进行设计。本着小型化、智能化的原则，设计中采用TI公司的高性能、微功耗MSP430F147单片机作为控制核心，实现了气体流量的实时补偿，提高了仪表的测量精度。在外围器件选型和软件编制过程中进行低功耗设计，极大地降低了仪表的功耗，使流量计具有较高的可靠性。通讯方面可以选择RS-485和HART总线方式，方便了仪表与上位机的连接。LCD显示和键盘方便了用户的操作。软件部分采用了模块化的编程，介绍了各模块的实现方法，最后组合起来进行调试。通过试验，本系统初步达到了流量计量的目的，系统的结构合理，功能完善，硬件和软件设计达到了预期要求。 关键词：涡轮流量计；MSP430；流量补偿；HART总线；温压传感器 Design of gas turbing flowmeter based on the MSP430 abstract Abstract:Flow measurement occupy an important position in industrial production,energymeasures,environmental,protection,transportation,biotechnology,engineering,military science and other fields.Therefore,there are far-reaching significance research and development applications in flow measurement instrument.Turbine Flowmeter is an indispensable instrument,which are continuously developed and improved with the development of modern computer technology. System hardware were designed through divided into different functional modules. Through use of TIs MSP430F147 microcontroller as the core, make the gas compensation in real-time and improve the accuracy of the measurement. In the course of design, reduce the power consumption of the instrument greatly, and make the flowmeter have a high reliability.It bouth has R485 and the HART bus, so connect to PC very conveniently. User can operate the turbine flowmeter easily, through LCD display and keyboard. Introducting the method of the module that how to Implementat and combination of debugging finally.The experiments result has showed that the system has the features of rational structure and perfect function. Key words:turbine flowmeter;MSP430;flow compensation;HART bus;pressure Sensor. 目录 1 绪论 1 1.1 引言 1 1.2 气体流量计的分类 1 1.3 涡轮流量计的工作原理 2 1.4 涡轮流量计的特点 2 1.5 本文研究内容 3 2 温压补偿技术的研究 4 2.1 温压补偿的必要性 4 2.2 补偿原理 4 3 涡轮流量硬件电路设计 5 3.1 涡轮流量计硬件整体结构 5 3.2 单片机的选取 5 3.2.1 超低功耗 5 3.2.2 强大的处理能力 6 3.2.3 高性能模拟技术及丰富的片上外