基于LabVIEW与TPG25xA的压强测量系统

A pressure measurement system based on LabVIEW and TPG25xA

LabVIEW(Laboratory Virtual Instrument Engineering Workbench)作为图形化编程语言,被广泛应用在各个领域,特别是数据采集与测量方面。这是因为LabVIEW支持多种仪器与数采硬件的驱动,开发功能高效、通用,集数据采集、数据分析与数据显示于一身。TPG25xA包括TPG251A与TPG252A,它们都是小型量规的真空测量与控制单元,只不过前者是单通道的,后者是双通道的。通过串口RS232C,TPG251A/TPG252A能被计算机或终端控制,也能与计算机进行通信,传递测量数据与命令。基于LabVIEW软件开发平台,通过PC与TPG25xA的串口通信,实现了一种压强测量系统。此系统与超真空系统连接使用,它能够在线显示压强-时间曲线、存储压强数据、计算其最大值、最小值与平均值,提供友好的人机交互界面。

LabVIEW （Laboratory Virtual Instrument Engineering Workbench） as a special graphical programming language for data acquisition and measurement has been widely applied in many fields, because it supports the drivabilities of a variety of instruments and data acquisition cards, thus integrating the functoons of data acquisition, analysis and visualization into one for efficient and versatile R＆D, monitoring and analyzing vibration signals. TPG25xA as a vacuum measuring and control element for light capacitance gauges includes TPG251A and TPG252A, where TPG251A is of single-channel while TPG252A of dual-channel. With the RS232C interface used to operate and control the TPG251A/TPG252A via computer or terminal, the communication between TPG251A/TPG252A and computer is available to transmit measured data and commands. A pressure measurement system is thus developed on the LabVIEW software platform through the serial communication between PC and TPG25xA. Connecting the system with an ultra vacuum system can provide a user-friendly man-machine interface by which the on-line display of time-dependent pressure, storage of acquired pressure data and computation of maximum, minimum and average values are all available.