【摘要】 提出了计数型模拟量新概念,该量同时具有模拟量和数字量的某些特征或者说具有二重性特征。通过分析找到两种计数型模拟量:调宽计数脉冲串和调频计数脉冲串,并阐述了它的产生方法,同时验证了它的二象性特征。利用计数型模拟量,无须使用A/D转换芯片,即可方便地实现单道或多道模数A/D转换。为了验证其可行性,本文给出了计数型模拟量在医学上的应用范例“人体血管壁动态信息多道遥测电脑系统”。通过该范例清楚地表明:计数型模拟量不仅应用方法简单可行,而且应用前景也很广阔。更多还原

【Abstract】 Counting-type analog quantity(CAQ),a new conception,is introduced in this article.CAQ possesses some features of analog quantity and digital quantity,that is to say,it has double features.By analysis,two kinds of CAQ are found: one is width-modulated countable pulse series,the other is frequency-modulated countable pulse series.Furthermore,the method of generating CAQ is described and its double feature is also proved.It is very convenient to realize single-channel or multi-channel analog-to-digital(A/D) conversion by using CAQ without utilizing present integrated A/D conversion chip.In this paper, for proving its feasibility,multi-channel telemetering computer system for dynamic information about human vascular wall,a typical example of using CAQ in medicine,is expatiated.The typical example clearly indicates: not only the method for application of CAQ is simple and viable,but also the application of CAQ is very wide.更多还原