静脉输液液位自动检测系统的研究
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摘要
医学静脉输液是临床医学中一个重要的治疗手段,在输液过程中,若药液接近滴完或
    因某种事故使输液速度过高或过低时,都要医务人员及时处理。目前由于没有有效、经济
    的自动检测装置,在输液时病人需要专人监护,加重了病人的思想负担和护理人员的劳动
    负担,也不利于病区的综合管理,为此我们研制医用输液液位和输液速度实时检测系统,
    该系统可以自动检测输液液位,并能将各床位液位和输液速度信号传送至护办室,在护办
    室对多个病房各个床位的输液情况进行巡回检测和显示。当液位低于设定下限值、输液速
    度过高或过低时,在护办室和相应床位处都能发出声光报警,提醒护理人员及时处理。
    为实现输液液位的自动、准确和非接触测量,设计一种变介电常数型电容式液位传感
    器。通过对不同宽度电极下传感器电容与对应液位的实验数据分析,发现液位处于输液瓶
    上部圆柱段时电容与液位高度之间有很好的线性关系,而在下部呈现非线性;传感器灵敏
    度随电极宽度的增加而近似线性提高。同时发现传感器灵敏度与液位下降速度相关。进而
    建立了传感器数学模型,分析影响传感器灵敏度的因素和机理。研究结果表明,以范德华
    力附着在瓶壁内侧的吸附水在电场作用下容易被极化,会引起其介电常数超常增大;瓶壁
    内侧的吸附水对传感器的灵敏度有直接影响。从而为传感器的正确设计与测量数据的修正
    提供了理论依据。
    本检测装置主要由电容式传感器、本地信号转换和报警模块、集中采样模块(从站)
    等部分组成,其中本地模块亦可单独使用。
    通过传感器理论设计、制作及具体电路设计和调试,发现该检测装置能基本满足实际
    需要,从而初步开发出一套静脉输液液位检测系统。
Medical infusion is an important treatment in clinic. During the infusion, medical personnel have to deal with the business in time when the infusion fluid is dripping up and when the infusion speed is much slower or faster. Because of the absence of the automatically measuring settings, special medical person has to ward them. This aggravates the patient's mental burden and the nursing persons' working burden. This also handicaps the synthesis management of the ward. Thus, the system is developed to measure infusion liquid level and infusion speed. The system automatically transports the detecting signal to the nursing office. In it the infusing situation of every bed in every sickroom is displayed. When the infusion liquid level is under the given lower limit and the infusion speed is much faster or lower, the alarm will be made in nursing office and corresponding bed to remind the paramedic to deal with it.
    To measure the medical infusion liquid level automatically and accurately without contact, a variable- dielectric-constant capacitive sensor is designed. The experimental data is obtained with the use of electrodes of different width. By analyzing the correlation between them, it is found that the sensitivity affected by the speed of infusion. The model of the sensor is presented and then the affecting factors and the mechanism on the sensitivity are discussed. It is showed that the water absorbed on the inside wall by molecular force is easily polarized, making the dielectric constant abnormally increase, which make water absorbed have significant effect on the sensitivity. Theoretical foundation for the designation of sensor and modification of the measured data is provided
    This measuring setting consists of capacitance sensor, local measuring and alarming block, central sampling block etc. The local measuring and alarming block can be used singly.
    Through theoretically designing and fabricating the capacitance sensor, circuit designing and debugging, it found that the measuring setting can satisfy practical demands. Based on this a suit of infusion-liquid-level-measuring system is developed.
引文
[1] 张爱华,朱亮.医用输液液位实时检测系统在康复护理中的作用 中国临床康复 2003,7(22) :1112-1113
    [2] 李丽宏,谢克明.液位自动检测的现状与发展太原理工大学学报 2001,7第四 期:40-45
    [3] Don Koeneman. Level araong layers accurately determining interface. Control Engineering Aug 1998; 45, 10; Wison Applied Science Technology Abstracts Plus Text: 85-87
    [4] Bob Zorich Monitoring Liquid Chemical Levels Semiconductor International; Jul 1997; 20, 8; Wilson Applied Science & Technology Abstracts Plus Text 327-334
    [5] Gyorki, John R Liquid-level Sensors Flood the marketplace Machine design; Jun 13, 1996; 68, 11; Wilson Applied Science &Technology Abstracts Plus Text 92-98
    [6] Bob Felton Level measurement: Ancient chore, modern tools InTech; Aug 2001; 48, 8; Wilson Applied Science & Technology Abstracts Plus Text 73-74
    [7] Anonymous Control Levels With Guided-wave radar Control Engineering; Jan 1997; 44, 1; Wilson Applied Science & Technology Abstracts Plus Text 101-102
    [8] 马西秦 自动检测技术 机械工业出版社 1993,4
    [9] 王元庆,王兴森 光电式液滴传感器 安徽机电学院学报 1996,12:64-68
    [10] 宋晴,裘祖荣,张国雄 光纤、电容液滴传感器的设计研究 传感器技术 2002,8: 5-9
    [11] 李瑞锋,赵明富 一种新型光电式液位传感器 大学物理实验 1999,12:46-50
    [12] 杨晓龙,陈孝友 电容法测液位高度和浓度实验 四川工业学院学报 2001,7:76-78
    [13] 杨晓龙,陈肇田,刘隆鉴 电容式液敏传感元件性能研究 传感器技术 1998,17-4: 17-21
    [14] 刘和平 PIC16F87X单片机实用软件和接口技术 北京航空航天大学出版社 2002,4
    [15] 肖国领,李宏超,徐延武 极板非平行时对圆板极距式电容传感器的性能影响分析 传感器世界 1997,7:12-14
    [16] 倪德儒,倪佳 电容传感器对介质厚度的检测 技术与应用2 003,3:31-32
    [17] 冯慈璋 电磁场原理 人民教育出版社 1979,4
    [18] 杨劲松,王敏 电容接近觉传感器研究 自动化仪表 1999,4:4-7
    [19] 李洪波,何闻,李扬,杨幕杰 湿度传感器电阻和电容分量测量方法的研究 仪表 技术与传感器 1993-3:10-13
    [20] 涂相逑 魏平 液位检测及精度分析 南昌大学学报 1999,9 21-3:28-30
    
    
    [21] 刘松龄,何翔用 MATLAB语言建立液位电容传感器特性的数学模型 传感器技术 2001,6:7-9
    [22] 王蔷,李国定,龚克 电磁场理论基础 清华大学出版社 2001,1
    [23] 黄文梅,熊桂林,杨勇 信号分析与处理-MATLAB语言及应用 1999,9
    [24] 董元彦,李宝华,路福绥 物理化学科学出版社 2000,9
    [25] 朱亮,张爱华 电容法测定焊剂含水量 焊接学报 2001,22(1) :69-72
    [26] 琚雪梅,陈海东,王钧 电容式湿度传感器的输出限幅现象分析 传感器技术 2002, 21. 3:11-13
    [27] 瞿宝峰,梁清华 检测粮食水分用的电容式传感器 传感器技术2003,22-3
    [28] 朱亮,张爱华,康龙 电容法测定低氢型焊条药皮湿度 甘肃工业大学学报 1996,3 22-25
    [29] 刘和平 黄开长 严利平 潘伟峰等译 PIC16F87X数据手册 北京航空航天大学出 版社 2001,6
    [30] Donald A .Neamen Electronic Circuit Analysis and Design New York; John Wiley and Sons,Inc.,1996
    [31] 李锻炼,向平,何平一 抗寄生干扰的小电容测量电路研究 仪表技术和传感器 1997: 28-32
    [32] 沈月婷,牛德芳,仲崇权 微机械电容式压力传感器的变换电路 传感器技术 2001-20-3:45-47
    [33] 徐群,王树勇,崔军,唐文英 一种新型液位传感器及变送器的研究 测控技术 2002,21-8:13-15
    [34] Murray, Charles J Capacitance technique improve Ievel measurement accuracy Design News; Mar 4, 1996; 51, 5; Wilson Applied Science & Technology Abstracts Plus Text 125-126
    [35] DeMssa, T.A; and Z.Ciccone. Digital Integrated Circuits. New York; John Wiley and Sons,Inc.,1996
    [36] Glasford ,GM. Digital Electronic Circuits. Englewood Cliffs, NJ:Prentice hall,Inc.,1998
    [37] 石东海,周旭升,扈啸 单片机数据通信技术-从入门到精通 西安电子科技大学出版 社 2003,5
    [38] 王幸之 王雷 王闪 单片机应用系统抗干扰技术 北京航空航天大学出版社 2001,3
    [39] 袁南儿,王万良,苏宏业 计算机新型控制策略及其应用,清华大学出版社1998
    [40] 武自芳,虞鹤松 微机控制系统及其应用 西安交通大学出版社 1998,8
    [41] 杨跃权 一种液位测量补偿方法极其实现 仪表技术与传感器 1997,5 32-35
    [42] 周航慈 单片机应用程序设计技术 北京航天航空大学出版社 2002,9
    [43] 胡广书 数字信号处理-理论、算法与实现清华大学出版社 2001,3

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