基于MSP430单片机罗茨专用智能流量计的研究
发布时间：2019-01-08 11:47
【摘要】：针对机械式罗茨流量计存在的不足,本文研制一种基于MSP430单片机的数字显示智能表头的罗茨流量计,它在满足低功耗的基础上实现了高精确测量。 本文将容积式流量计的计量原理与超低功耗单片机MSP430F149相结合,设计出工作可靠性强的硬件电路和运行效率高的软件代码。在时钟芯片和运算放大器的选择上,也都考虑到系统低功耗的要求,尤其是在流量信号检测方面,本文选用了零功耗的韦根德传感器,做到精确测量流量的同时又不消耗系统能量。针对气体受工况温度和压力影响比较大的事实,本文采用压缩系数的方法进行实时的温压补偿,提高了流量计的测量精度。另外,根据脉冲频率与仪表系数的关系,从软件方面对流量仪表的仪表系数进行了分段修正,从而获得准确的仪表系数,显著地提高流量计测量精度。该罗茨流量计还有标准信号输出模块和RS485通信模块,可以与上位机很方便地进行通信。液晶模块的设计,实现了友好的用户界面。操作简单的按键模块,供用户随时修改参数和查看时间。 通过理论分析和现场实验,证明这种流量计实现了在低功耗基础上的精确测量,有很好的发展前景。
[Abstract]:Aiming at the shortage of mechanical Roots Flowmeter, a kind of Roots Flowmeter with digital display intelligent head based on MSP430 microcontroller is developed in this paper. It realizes high precision measurement on the basis of low power consumption. In this paper, the measuring principle of the volumetric Flowmeter is combined with the ultra-low power consumption single chip computer (MSP430F149) to design the hardware circuit with strong reliability and the software code with high running efficiency. In the selection of clock chips and operational amplifiers, the requirement of low power consumption is also taken into account. Especially in the aspect of traffic signal detection, the zero-power Wagend sensor is used in this paper. Accurate measurement of flow without consuming system energy. In view of the fact that the gas is greatly affected by temperature and pressure, the compression coefficient method is used to compensate the temperature and pressure in real time, which improves the measuring accuracy of the Flowmeter. In addition, according to the relation between the pulse frequency and the instrument coefficient, the instrument coefficient of the flow meter is modified by software in order to obtain the accurate instrument coefficient and improve the measuring accuracy of the Flowmeter. The Roots Flowmeter also has the standard signal output module and the RS485 communication module, which can communicate conveniently with the upper computer. The design of liquid crystal module realizes friendly user interface. Simple operation of the key module, for users to modify parameters and view time. Through theoretical analysis and field experiments, it is proved that the Flowmeter achieves accurate measurement on the basis of low power consumption and has a good prospect.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP216.1
本文编号：2404555
[Abstract]:Aiming at the shortage of mechanical Roots Flowmeter, a kind of Roots Flowmeter with digital display intelligent head based on MSP430 microcontroller is developed in this paper. It realizes high precision measurement on the basis of low power consumption. In this paper, the measuring principle of the volumetric Flowmeter is combined with the ultra-low power consumption single chip computer (MSP430F149) to design the hardware circuit with strong reliability and the software code with high running efficiency. In the selection of clock chips and operational amplifiers, the requirement of low power consumption is also taken into account. Especially in the aspect of traffic signal detection, the zero-power Wagend sensor is used in this paper. Accurate measurement of flow without consuming system energy. In view of the fact that the gas is greatly affected by temperature and pressure, the compression coefficient method is used to compensate the temperature and pressure in real time, which improves the measuring accuracy of the Flowmeter. In addition, according to the relation between the pulse frequency and the instrument coefficient, the instrument coefficient of the flow meter is modified by software in order to obtain the accurate instrument coefficient and improve the measuring accuracy of the Flowmeter. The Roots Flowmeter also has the standard signal output module and the RS485 communication module, which can communicate conveniently with the upper computer. The design of liquid crystal module realizes friendly user interface. Simple operation of the key module, for users to modify parameters and view time. Through theoretical analysis and field experiments, it is proved that the Flowmeter achieves accurate measurement on the basis of low power consumption and has a good prospect.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP216.1
【参考文献】
相关期刊论文 前10条
1 王文生;InSb磁阻元件与传感器的进展[J];传感器技术;1994年02期
2 李秀娟;;基于集成温度传感器的数显温控电路[J];电脑知识与技术;2010年09期
3 陈特放;石英春;张桂新;;霍尔传感器在机车测速中的应用[J];电气时代;2006年04期
4 冯夏勇，，宾鸿赞;微机转速测量常用方法与精度分析[J];电子与自动化;1995年02期
5 李加良;;基于MSP430的差压流量变送器的研发[J];仪器仪表用户;2009年04期
6 陈丽君,王为民,程晓崇;流体密度的常用补偿方法[J];工业计量;2003年06期
7 翟超进;候贞绵;;真实气体范德华状态方程及其修正式的改写式[J];河北化工;1990年01期
8 高成,王自玲,周广飞,韩长城;气体流量的温度压力补偿[J];化学工程师;2001年04期
9 吴白云;一种简单的低频脉冲周期测量电路[J];计量与测试技术;1998年01期
10 聂北刚,李初琴;传感器故障诊断实时监测系统设计的探讨[J];机械强度;2001年03期
相关硕士学位论文 前3条
1 张红光;流量计量中密度补偿的研究[D];四川大学;2003年
2 宁学明;齿轮转速传感器性能参数测试系统设计[D];南京航空航天大学;2006年
3 吴峰;光电式正多面体转速传感器设计[D];西北农林科技大学;2006年
本文编号：2404555
本文链接：https://www.wllwen.com/kejilunwen/jisuanjikexuelunwen/2404555.html
