气体涡轮流量计 毕业设计论文

摘要

计量是工业生产的眼睛。流量计量是计量科学技术的组成部分之一，它与国民经济有着密切的关系。尤其在当今能源危机，工业生产自动化越来越高，能源使用浪费现象严重的时代情况下。流量计有了越来越重要的地位，受到人们越来越多的关注。在当今社会流量计已经广泛运用于工农业生产，交通运输，国防建设，科学研究，对外贸易，以及人民生活的各个角落，由此可见对流量计的研究与开发认知，有着广泛的意义和作用！

根据实现功能的需要，本课题设计了一款基于AT89C51为核心的单片机气体涡轮流量计。该流量计具有测量精度高，能耗低，稳定性好，测量范围广，维修方便等优势。控制器主芯片AT89C51具有低功耗，驱动能力强，稳定性好等特点。根据设计要求硬件部分主要分四个模块，即流量传感变送模块，主控CPU智能模块，LED数码管显示模块和上位机通讯模块。各模块能独立工作，并通过通讯接口，键盘模块等功能模块组成功能完善的整体。流量计的设计结构合理，运行稳定可靠，同时具有了RS-485通信接口，适合应用于远程分布式系统的流量检测

关键词：涡轮气体流量传感器 AT89C51芯片 RS-485通讯接口

ABSTRACT

Measurement is the eyes of industrial production. Flow measurement is the measurement of science and technology, it is part of the national economy and have a close relationship.. Especially in today's energy crisis, industrial production and high automation, energy use serious waste of time situation.. Flowmeter have an increasingly important position, gets more and more attention. .In today's society flowmeter have been widely used in industrial production, transportation, national defense construction, scientific research, trade, and people's life. Thus the research and development of flowmeter is widely cognitive, the significance and role of!

According to the realization of the function, this topic design based on AT89C51 microcontroller as the core of gas turbine flow meter. The meter has high accuracy, good stability, low energy consumption, measuring range, convenient maintenance

and other advantages. Main chip controller with low consumption, drive AT89C51 ability, good stability .According to the design requirements of the hardware part four modules, namely flow sensor and control variable send module CPU intelligent module, LED digital display module and tube computer communication module .Each module can work independently, and through the communication interface module, keyboard function module function perfect overall. The design flow with reasonable structure, stable operation, also has the RS-five 485 communication interface, suitable for application of remote distributed system flow testing.

Key words：Turbine wheel gas flow amount sensor；AT89C51 chip；RS-485 communication connection；

目录

第一章绪论 (1)

1.1 课题背景 (1)

1.2 流量计的发展 (1)

1.3 流量计的分类及其工作原理 (2)

1.4 研究的内容与目的 (7)

第二章流量计的设计基本原理 (8)

2.1 涡轮流量计的基本工作原理 (8)

2.2 流量计的结构 (9)

第三章流量计的硬件电路设计 (10)

3.1 流量传感变送模块 (10)

3.2 AT89C51单片机模块设计 (11)

3.3 键盘液晶显示部分 (11)

3.4 通信模块 (16)

第四章软件部分设计 (19)

4.1 主程序设计 (19)

4.2 中断程序 (20)

4.3 流量检测程序 (21)

4.4 功能块程序 (22)

第五章总结 (23)

参考文献 (24)

外文资料

中文译文

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