基于单片机的气体流量检测系统论文.doc

摘要
工业生产中过程控制是流量测量与仪表应用的一大领域,流量与温度、压力和物位一起统称为过程控制中的四大参数,人们通过这些参数对生产过程进行监视与控制。对流体流量进行正确测量和调节是保证生产过程安全经济运行、提高产品质量、降低物质消耗、提高经济效益、实现科学管理的基础。流量的检测和控制在化工、能源电力、冶金、石油等领域应用广泛。
本文以80C51单片机为智能检测核心,充分利用单片机丰富的硬件资源,配以适当的检测接口电路,可精确测量由涡轮流量传感器输出的代表流量大小的脉冲信号。由软件计算出流量,以简单的硬件结构实现了一个高可靠性、高精度、多功能,价格相对便宜的气体流量检测系统。
关键字:AT89C51;ADC0809;涡轮流量传感器;放大电路
Abstract
Industrial production process control is the flow measurement and instrumentation big field, flow and temperature, pressure and thing location for process control of collectively together four parameters, people through these parameters on the production process for monitoring and control. The fluid flow measure and adjust properly is to ensure the safe and economic operation process, improve the product quality and reduce the material consumption, to improve the economic benefit and to realize scientific management foundation. Flow of the detection and control in chemical, electrical energy, metallurgy, petroleum, etc wide application.
This paper 80C51 SCM in for intelligent detection core, make full use of single-chip puter rich hardware resources, match with proper testing interface circuitry, can accurate measurement of turbine flow sensor or by representatives of ic flow sensor output pulse signal, the flow volume. Calculated by software for virtual standard state and cumulative flow, tell with simple hardware structure achieved a high reliability, high precision, multi-function, cheaper gas flow detection system.
Key word: AT89C51, ADC0809, turbine flow sensor
目录
摘要 I
Abstract II
1 绪论 1
现状 1
检测流量的分类 1
3
2 系统工作原理 5
5
5
5
单片机 5
A/D转换元件 6
LED显示元件 9
3 系统硬件电路设计 12
外围电路硬设计 12
信号的采集 12
放大电路的设计 13
单片机硬件电路及其外围电路的设计 14
14
与LED现实的接口 15
4 系统软件设计 18
19
20
A/D转换程序 21
5 抗干扰技术 23
硬件措施 23
23
参考文献 25
结束语 26
致谢 27
1 绪论
现状
在物资量计量领域中,流体流量的检测是各行各业加强物料管理、能源管理,进行物资交接、财务结算,经济核算,效益分析