增强型并口EPP模式下多路压力传感器采集系统  

Real-time Multichannel Signal Press Sensor Data Acquisition System Based on the EPP Model

作　　者：宋鑫[1] 叶家玮[1] 

机构地区：[1]华南理工大学交通学院,广东广州510640

出　　处：《现代电子技术》2005年第22期77-78,85,共3页Modern Electronics Technique

摘　　要：介绍了基于计算机增强型并口EPP(Enhanced Para lle l Port)的多路电感调频式压力传感器(BTY 4)频率数据采集系统。根据增强型并口EPP特殊的工作方式,使用74HC 138译码芯片及简单逻辑门电路,巧妙地分离出读地址信号、读数据信号、写地址信号、写数据信号4种片选信号。该系统利用82C 54芯片计数功能方便地提取传感器频率数据后,计算机通过并口EPP实时采集芯片的数据,修正后计算出压力数据,并显示压力变化的统计图。系统基于总线设计思路,利用地址复用功能简单方便地实现对多通道输入数据的采集。系统实用、成本低、功能强,是利用EPP实现便携式高速数据采集的一个合适的方案。A multichannel frequency data acquisition system of electrical inductance frequency modulation pressure sensor（BTY4） based on EPP （enhanced parallel port） of computer is described. Due to the special operation mode of EPP, system smartly uses 74HC138 decoding chip and a simple logic gate circuit to separate the read address signal, read data signal, write address signal, write data signal. After the system conveniently gets the frequency data by the counters of 82C54 chips ,computer collects the data through enhanced parallel port EPP and calculates the real-time pressure data after correction,and displays the pressure variation by the pressure statistical chart. By the idea of computer bus,system realizes the multichannel input data collection by multiple-use address bus. System is practical ,low cost and powerful ,a proper way of realizing a portable quick data acquisition system by the use of EPP.

关 键 词：增强型并口 数据采集 压力传感器 频率信号 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]