基于ATmega128L的电动胎头吸引器设计  

Design of an electronically-controlled vacuum extractor based on ATmega128L

作　　者：许任兴 严荣国[1,2] 张瀚文 郭田雨 徐玉玲 颜丽琴 Xu Renxing;Yan Rongguo;Zhang Hanwen;Guo Tianyu;Xu Yuling;Yan Liqin(School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Engineering Research Center of Interventional Medical Device,Shanghai 200093,China)

机构地区：[1]上海理工大学医疗器械与食品学院,上海200093 [2]上海介入医疗器械工程技术研究中心,上海200093

出　　处：《电子测量技术》2021年第12期34-40,共7页Electronic Measurement Technology

基　　金：上海介入医疗器械工程技术研究中心项目(18DZ2250900)资助。

摘　　要：为了满足临床助产的需求并解决传统产钳与手动吸引器的不足,开发设计了一款闭环PID控制的电动胎头吸引器。ATmega128L单片机通过PID控制算法处理负压传感器反馈的负压信息,输出信号控制变频器,进而控制负压泵对负压进行精准控制。同时本系统还具有实时屏幕负压信息显示,紧急一键泄放负压,负压异常声光报警等功能,这使得医护人员能够更加放心高效的操作。实验分别采用市场上常用的启停式控制与本系统使用的PID算法控制进行对比,测试结果表明该系统PID算法控制更加准确高效;在重复性实验中,分别以-40、-50和-60 kPa为目标值测试,测试均值分别为-40.21±0.66、-49.67±0.87和-60.57±1.24 kPa,测试结果表明该系统稳定性较好,能够满足临床助产需求。In order to meet the requirements of clinical delivery and solve the shortcomings of traditional forceps and manual aspirator, a closed-loop PID controlled electronically-controlled vacuum extractor was developed and designed. The ATmega128 L microcomputer processes the negative pressure information fed back by the negative pressure sensor through the PID control algorithm processing negative pressure sensor feedback negative pressure information to output signals to control the frequency converter, and then controls the vacuum extractor to carry out accurate control of the negative pressure. At the same time, the system also has real-time screen negative pressure information display, emergency one-button release of negative pressure, negative pressure abnormal sound-light alarm and other functions, which enables medical staff to operate more confidently and efficiently. The test compared start-stop control that the commonly used in the market with the PID control algorithm which used in this system. Result showed that the PID control algorithm was more accurate and efficient. In the repeatability experiment, the target values of-40,-50 and-60 kPa were respectively tested, and the mean values of the test were-40.21±0.66,-49.67±0.87 and-60.57±1.24 kPa. Results showed that the system had a good stability and could meet the needs of clinical midwifes.

关 键 词：ATMEGA128L 数字PID算法 电动胎头吸引器 负压 

分 类 号：TN702[电子电信—电路与系统] TP311.1[自动化与计算机技术—计算机软件与理论]