微机型贲门音图仪的设计研究

Development of the Gulp-water Cardiophonography Based on Microcomputer

从硬件和软件两个方面介绍了微机型贲门音图仪。硬件设计上采用目前普遍应用的 ８０３１单片机及 Ａ ／Ｄ、Ｄ ／Ａ等集成电路，实现低成本、小型化、智能化。软件设计中，结合仪器和吞水音信号的特点，采用提取正负峰值的方法对音阁波形压缩存储；利用变速输出的方式用热笔记录器描记音阁波形。

The hardware and software of the gulp-water cardiophonography based on microcomputer are introduced. For hardware,8031 single chip computer and other integrated cur cuit such as A/D and D/A are adopted to realize low price .small size and intelligence. In software design, according to the charac teristics of gulp-water sound wave and apparatus, the method of collecting positive peak value and negative peak value is applied in the system to realize compression storage; we adopt the out put method with variation in speed is adopted. to record the cardiphonogram's wave with thermal pen recorder.