基于虚拟仪器的压力监测系统的设计 大学毕设论文.doc

摘要生产过程参数的智能监测是实现自动化的重要标志,监测到的数据需要进行实时采集、传送、处理。随着计算机技术、通信技术的迅速发展,虚拟仪器率先由美国于 20 世纪 80年代末研制成功,它是计算机系统与仪器系统技术相结合的产物。其运用配套的虚拟仪器开发软件,借助 PC机超强的计算处理能力而被广泛的运用于工厂的各种数据监测与处理。本设计为多通道压力监测系统,用来监测来自各处不同的压力变化情况。实现 4路压力的实时监测、波形显示。具体为应用 LabVIEW 图形化编程软件和 LabJackU12 数据采集卡设计 4通道压力监测系统,采用压力传感器,对4路压力数据进行采集、分析处理、存储显示,实现压力数据的曲线和数字实时显示,并具有超限报警功能,并对数据进行统计分析,利用 EXCEL 工具箱实现报表输出。本系统包括三个基本硬件部分:压力传感器,数据采集卡,PC机。其中,压力测量利用 AK-4 型数字压力传感器,传感器输出的 4-20mA 信号送入调理电路转换为 1-5V 电压信号,再送入 LabJack U12 数据采集卡将模拟量到数字量的转换,并输入到 PC机中, 然后利用 PC 机中的 LABVIEW 图形化编程软件将输入的电压信号处理输出并且显示,并对信号进行分析对超限信号起到报警功能。关键词: 压力监测 LABVIEW 数据采集 ABSTR A CT Intelligent monitoring of the production parameters is an important symbol to automate . The monitoring of the data requires real-time acquisition, transmission, processing. puter technology, communication technology, the rapid development of the first virtual instrument was developed in the late 80by the United States in the late 20th century, the essful development puter systems and equipment, it is the product of bination system technology. Its application supporting the development of virtual instrument software, with PC-puting processing power has been widely used ina variety of plant data monitoring and processing. The design for the multi-channel pressure monitoring system, use d monitor the pressure from changes in various parts. Pressure to achieve 4-way real-time monitoring, waveform display. Specifically for the application of LabVIEW graphical programming software and LabJackU12 Data Acquisition Card Design 4-channel pressure monitoring system, using pressure sensors, pressure on the 4-way data collection, analysis and processing, storage, display, realization of the curve of pressure data and digital real-time display, and has The more limited alarm functions, and statistical analysis of data using EXCEL toolbox to achieve report output. The system consists of three basic ponents: pressure sensors, data acquisition card, PC machine. Among them, pressure measurement using AK-4 type