单导联心电图机学习机的研制

目的：研制一种供医疗仪器维修专业学生学习《心电图机的原理与维修》课程的辅助实验、实训仪器。方法：以经典的6511型单导联心电图机为基础进行改进，学习机电路板面积增大，元器件布局宽松合理，标注清楚，元器件的位置和连接、信号的走向、整体的布局等与原理图完全一致：采用高分辨率热点阵输出系统：配备240×128的图形液晶显示波形；用独特的高精度数字滤波器消除基线漂移；全触摸式彩色识别键盘控制。结果：记录频响可达150Hz，方便观察及波形判读，方便操作。结论：方便了学生对照原理图学习实际电路，提高了学生的学习效率，满足了《心电图机的原理与维修》这门课实验、实训的基本要求。

Development of Experimental Electrocardiograph

Objective To develop a kind of experimental instrument for students who major in Medical Devices Maintenance to study The Principle and Maintenance of Electrocardiograph. Methods Based on the classical single lead ECG, the experimental electrocardiograph was used to do the experiment. The instrument was equipped with clear matrixoutput system, 240×128 LCD screen, high precision digital-filter and all touch screen. Furthermore, the instrument had optimum size, clear label, loose but logical layout according to circuit diagram, Results Frequency response was 150Hz, which was convenient for observation, judgment and operation. Conclusion The instrument facilitates students＇ study and improves learning efficiency thus meeting the requirements of the subject.