计数型模拟量及人体血管壁动态信息多道遥测电脑系统的研制  

Counting-type Analog Quantity and Development of Mutli-channel Telemetering Computer System for Dynamic Information about Human Vascular Wall

作　　者：陈龙聪[1] 胡国虎[1] 

机构地区：[1]重庆医科大学生物医学工程研究室,重庆400016

出　　处：《生物医学工程学杂志》2006年第1期200-204,共5页Journal of Biomedical Engineering

基　　金：重庆医科大学创新基金资助课题(CX200104)的重要组成部分

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。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.

关 键 词：计数型模拟量 模数A/D转换 计算机接口 

分 类 号：TP873[自动化与计算机技术—检测技术与自动化装置]