医用超声流量计标定气体流量控制系统的设计.doc
约39页DOC格式手机打开展开
医用超声流量计标定气体流量控制系统的设计,1.76万字自己原创的毕业论文，仅在本站独家出售，重复率低，推荐下载使用 摘要 随着科学技术的进步和工业的发展,工程中对气体流量的控制及测量精度的要求越来越高。但由于气体的可压缩性远大于液体的可压缩性,气体流量控制更是难以精确控制。传统流量控制是通过改变流量控制阀的阀内流道的最小...
内容介绍
此文档由会员 淘宝大梦 发布
医用超声流量计标定气体流量控制系统的设计
1.76万字
自己原创的毕业论文，仅在本站独家出售，重复率低，推荐下载使用
摘要 随着科学技术的进步和工业的发展,工程中对气体流量的控制及测量精度的要求越来越高。但由于气体的可压缩性远大于液体的可压缩性,气体流量控制更是难以精确控制。传统流量控制是通过改变流量控制阀的阀内流道的最小截面积,从而改变流动阻力的办法来实现的。理论上,改变节流通道的面积,可线性调节流量。流量不只和节流面积有关,实际上,节流面积的改变,也必然会使阀前后的压差发生变化。这就导致相对开度和相对流量之间的关系是不一定的,非线性的。通过调节阀芯开度的方式来调节流量虽然不够精确,而且不易实现自动化控制[1]。但在实际应用中,有时需要在一个系统中对流量实现自动化控制。针对这种情况,构建了一个气体流量控制系统系统。气体流量控制系统的设计，可用于系统中流量的自动控制。
本课题完成了基于msp430单片机、IAR EWARM的总体方案和组成框架设计、硬件和软件的设计，用于控制步进电机进而控制阀门工作。用户通过用户操作界面设定气体流量控制装置的各项参数，来实现想要的气体流量速度。气体流量自动化控制系统设计使得用户使用起来更加简便、直观。
硬件电路主要包括信号的采集、单片机控制模块。信号采集电路主要完成信号采集，放大，滤波功能，属于典型的信号采集处理系统。处理对象，根据超声流量计信号的特点，设计了前置放大电路。为更好的降低干扰的影响，设计了高通和低通滤波电路，成功提取了超声流量计信号。微控制器电路通过A/D转换把模拟信号转换成数字信号送至微处理器做进一步处理。
软件部分主要完成超声流量计信号存储和处理等功能，开发工具是IAR，采用C语言来编程。主程序通过调用各种子程序模块完成特定的功能。子程序包括数据采集处理、步进电机正反转子程序、加速程序。
关键词：气体流量 控制系统 信号采集 步进电机
The design of the control system using the medical ultrasonic flowmeter to calibrate gas flow
Abstract With the development of science and technique progress and industry, control and measurement accuracy of the gas flow in the project of the increasingly high demand. But due to the compressibility of gas is far greater than the compressibility of the liquid, gas flow control is even more difficult to precisely control. The control of traditional traffic is the minimum cross-sectional area to change the flow control valve of the valve flow, thus changing the flow resistance of the approach to the realization of the. In theory, change the throttle channel area, linear flow regulation. Flow not only,and the throttling area in fact, throttle area change, will also make the pressure valve before and after the change. This leads to the relationship of between relative opening and the relative flow is not necessarily, nonlinear.By adjusting the valve opening to regulate the flow though the way is not precise enough, and not easy to bring about auto-control. But in practical application, sometimes need in a system to bring about the automatic control of flow. In view of this situation, to build a system that can control the gas-flow . The design of gas-flow control system, can be used for automatic control system of flow.
This paper completes the overall plan of msp430 SCM, IAREWARM and the frame design, the design of hardware and software based on, for control of stepper motor and control valve. The user set parameters of gas-flow control device through the user interface, to achieve the gas-flow velocity wanted. The gas-flow automatic control system allows users to use more convenient, intuitive.
The hardware circuit mainly includes signal acquisition, MCU control module. The circuit of signal acquisition mainly completes signal acquisition, amplification, filtering function,which belongs to the typical signal acquisition and processing system. The treatment object, according to the characteristics of ultrasonic flowmeter signal, design the pre amplifier circuit. In order to reduce the interference effects,designing a wave filter of high and low pass, successfully extracted from ultrasonic flowmeter signal. The circuit of micro controller through the A/D converter converts the analog signal into digital signal is send to the microprocessor to further processing.
The software part mainly completes the signal storage of ultrasonic flowmeter and processing functions, development tools are IAR, using C language programming. Main program completed a variety of specific functions by calling the subroutine modules. Subroutine includes data acquisition and processing, man-machine interface program of stepper-motor and rotor program.
Keywords: gas-flow rate Control system signal acquisition stepper motor
目录
第一章绪论 1
1.1课题研究的背景和意义 1
1.2国内外研究现状和发展 1
1.3本文的工作目标及内容 4
1.3.1本文主要工作 4
1.3.2论文结构安排 4
第二章系统总体分析 5
2.1系统方案论证 5
2.2系统总体结构设计 5
第三章硬件设计 6
3.1步进电机分析 6
3.1.1步进电机优点 6
3.1.2步进电机缺点 6
3.1.3步进电机原理与机理 7
3.2单片机系统 9
3.2.1单片机定义 9
3.2.2单片机特点 9
3.2.3单片机选择 9
3.3信号采集模块 11
3.3.1信号检测与传感器 11
3.3.2前置放大电路 12-b..
1.76万字
自己原创的毕业论文，仅在本站独家出售，重复率低，推荐下载使用
摘要 随着科学技术的进步和工业的发展,工程中对气体流量的控制及测量精度的要求越来越高。但由于气体的可压缩性远大于液体的可压缩性,气体流量控制更是难以精确控制。传统流量控制是通过改变流量控制阀的阀内流道的最小截面积,从而改变流动阻力的办法来实现的。理论上,改变节流通道的面积,可线性调节流量。流量不只和节流面积有关,实际上,节流面积的改变,也必然会使阀前后的压差发生变化。这就导致相对开度和相对流量之间的关系是不一定的,非线性的。通过调节阀芯开度的方式来调节流量虽然不够精确,而且不易实现自动化控制[1]。但在实际应用中,有时需要在一个系统中对流量实现自动化控制。针对这种情况,构建了一个气体流量控制系统系统。气体流量控制系统的设计，可用于系统中流量的自动控制。
本课题完成了基于msp430单片机、IAR EWARM的总体方案和组成框架设计、硬件和软件的设计，用于控制步进电机进而控制阀门工作。用户通过用户操作界面设定气体流量控制装置的各项参数，来实现想要的气体流量速度。气体流量自动化控制系统设计使得用户使用起来更加简便、直观。
硬件电路主要包括信号的采集、单片机控制模块。信号采集电路主要完成信号采集，放大，滤波功能，属于典型的信号采集处理系统。处理对象，根据超声流量计信号的特点，设计了前置放大电路。为更好的降低干扰的影响，设计了高通和低通滤波电路，成功提取了超声流量计信号。微控制器电路通过A/D转换把模拟信号转换成数字信号送至微处理器做进一步处理。
软件部分主要完成超声流量计信号存储和处理等功能，开发工具是IAR，采用C语言来编程。主程序通过调用各种子程序模块完成特定的功能。子程序包括数据采集处理、步进电机正反转子程序、加速程序。
关键词：气体流量 控制系统 信号采集 步进电机
The design of the control system using the medical ultrasonic flowmeter to calibrate gas flow
Abstract With the development of science and technique progress and industry, control and measurement accuracy of the gas flow in the project of the increasingly high demand. But due to the compressibility of gas is far greater than the compressibility of the liquid, gas flow control is even more difficult to precisely control. The control of traditional traffic is the minimum cross-sectional area to change the flow control valve of the valve flow, thus changing the flow resistance of the approach to the realization of the. In theory, change the throttle channel area, linear flow regulation. Flow not only,and the throttling area in fact, throttle area change, will also make the pressure valve before and after the change. This leads to the relationship of between relative opening and the relative flow is not necessarily, nonlinear.By adjusting the valve opening to regulate the flow though the way is not precise enough, and not easy to bring about auto-control. But in practical application, sometimes need in a system to bring about the automatic control of flow. In view of this situation, to build a system that can control the gas-flow . The design of gas-flow control system, can be used for automatic control system of flow.
This paper completes the overall plan of msp430 SCM, IAREWARM and the frame design, the design of hardware and software based on, for control of stepper motor and control valve. The user set parameters of gas-flow control device through the user interface, to achieve the gas-flow velocity wanted. The gas-flow automatic control system allows users to use more convenient, intuitive.
The hardware circuit mainly includes signal acquisition, MCU control module. The circuit of signal acquisition mainly completes signal acquisition, amplification, filtering function,which belongs to the typical signal acquisition and processing system. The treatment object, according to the characteristics of ultrasonic flowmeter signal, design the pre amplifier circuit. In order to reduce the interference effects,designing a wave filter of high and low pass, successfully extracted from ultrasonic flowmeter signal. The circuit of micro controller through the A/D converter converts the analog signal into digital signal is send to the microprocessor to further processing.
The software part mainly completes the signal storage of ultrasonic flowmeter and processing functions, development tools are IAR, using C language programming. Main program completed a variety of specific functions by calling the subroutine modules. Subroutine includes data acquisition and processing, man-machine interface program of stepper-motor and rotor program.
Keywords: gas-flow rate Control system signal acquisition stepper motor
目录
第一章绪论 1
1.1课题研究的背景和意义 1
1.2国内外研究现状和发展 1
1.3本文的工作目标及内容 4
1.3.1本文主要工作 4
1.3.2论文结构安排 4
第二章系统总体分析 5
2.1系统方案论证 5
2.2系统总体结构设计 5
第三章硬件设计 6
3.1步进电机分析 6
3.1.1步进电机优点 6
3.1.2步进电机缺点 6
3.1.3步进电机原理与机理 7
3.2单片机系统 9
3.2.1单片机定义 9
3.2.2单片机特点 9
3.2.3单片机选择 9
3.3信号采集模块 11
3.3.1信号检测与传感器 11
3.3.2前置放大电路 12-b..
