Distributed Measurement System Based On Internet

With the development of science and technology, people put forward more and more demands with the measurement technology. Traditional electronic equipments can't meet the common needs of actual measurement work. It is an important research theme of modern Distributed Measurement System (DMS) that we combine computer technology, sensor technology, net technology, database technology with measurement technology, so that we can build net, integrated, distributed measurement system.This dissertation starts with the research background and significance of the theme, the history, domestic and international developments of DMS and Virtual Instrument, briefly introduce the model of the DMS, analyze and design each module of DMS web-site management sub-system and Virtual Instrument measurement subsystem in detail by using .NET, DBS, virtual instrument etc. technologies.Based on the idea of general design, the theme starts to make the requirements analysis in order to get the functions of different roles, get the general realization scheme and functional architecture of the system, analyze and discuss each modal from design interface, design step and code in detail. In the realization of Virtual Instrument measurement system, I solve the problems such as multi-channels data sample, multi-channels data transportation, put the measurement data into the Database etc by ways of correctly setting the data organization of multi-channels, LabVIEW multi-threads technology, LabSQL software.The running and test results tell us: DMS based on Internet not only relize remote test but also relize distributed measurement management.