Study of remote experiment management based on Labview
Chunxi Zhao
Jilin Agricultural University,Changchun 130118,China
10821395@qq.com
Keywords:
Virtual network laboratory; OPC; virtual experiment; LabVIEW
Abstract.
This article designs and exploits the multilayer distributed mixed virtual network
laboratory (Virtual NetLab)
based on LabVIEW, and presents a new scheme of data acquisition
which combines LabVIEW with OPC technology. This scheme primly solves the laboratory’s
difficult problem of data collection. Moreover, the remote-client of Virtual NetLab is enriched by the
LabVIEW’s strong network function. The experiment results show that the
results of the remote
client experiment and the running results of the local experimental system are consistent. And the
delay time is less than 1s. The function of remote synchronous experiment is realized. At the same
time, it proves that the control algorithm has good control effect, which proves the availability of the
virtual network lab and the good operation performance.
Introduction
With the rapid development of micro electronic technology
and computer technology, virtual
instrument (Instruments Virtual, VI) came into being. Virtual instrument technology is a revolution in
the history of the development of modern instruments[1]. It has had an immeasurable
impact on the
development of science and technology and industrial production. At the same time, it also brings the
dawn to the development of virtual laboratory. Virtual laboratory was
structured based on network
technology and virtual instrument technology. On the one hand, it can make the laboratory
experiment teaching
equipment keep its advanced, and closely follow the pace of the development of
modern science and technology. And it can reduce the experimental cost and improve the
experimental use rate. On the other hand, it can make students break the limitation
of traditional
experiment time and space. VI can complete a variety of experiments by remote computer, to obtain
the same experience as the real experiment[2].
At present, most of the virtual network laboratory system is composed of 3 main functions:
remote client, server and field equipment. Among them, the server is the core of the entire virtual
network lab, which connects the remote client and the field control terminal[3]. The server is a bridge
of data communication. LabVIEW provides the ability of a convenient access
and a powerful
real-time control as a virtual instrument development platform. A complete virtual laboratory was
build by using LabVIEW. The virtual experiment instrument was developed with its own component,
which
is not only powerful, but also the appearance is the same as the real instrument[4]. Thus,
LabVIEW become the first choice of development platform in virtual laboratory equipment.
