Applying Web Services To Instrument Remote Control In Distributed Environment

With the development of computer technology and network communication, the new era's instrument becomes a concept of an open system: instrument is a both software and hardware set which can provide the easy access to getting the measuring information (or data) anytime and anywhere. Compared to the old idea of the traditional single instrument, the new concept extends by adding the meaning of instrument sharing in the easy and flexible manner. Instrument sharing could break through the obstacle of physical distance with the purpose of making software or hardware resources available in versatile fields, which enhances the efficiency of production. Nowadays, the share platform of instrument, as the sources of the information of the society, has been regarded as the strategic keystone of the national development. This issue is also becoming a hotspot and it attracts the researchers' attention tremendously.During the whole process of researching on instrument share, the instrument remote control is a key problem. How to allow users to operate the equipment remotely and transparently, and to obtain the equipment sharing physically, is the issue to be thought over. At present, the design of the remote control of instrument has several problems: clients and instrument server are tightly coupled; the design is short of flexibility; resources have poor interoperability and so on. According to these problems, the main work of this dissertation focuses on how to bring the service-oriented idea to the instrument remote control domain.This thesis firstly reviews the instrument's evolvement, with which the instrument control method has changed enormously, analyzes the distributed objects technology and then points out the problems of the design of instrument remote control over network. Secondly, the thesis briefly describes the architecture of Web Services and introduces the idea of service-oriented to this domain: an instrument provider encapsulates the functions and abstracts them into services; these services dynamically join the "virtual community" and provide the exoteric users with the function interfaces; users could discover the services and obtain them to accomplish the instrument remote control on network.. During the whole process, in order to decrease the difficulty in developing the instrument remote control function, this thesis proposes a model-driven instrument development based on XML and specifies the method. Finally, the thesis starts at the established model and accomplishes the instrument remote control practice according to a particular instrument (automatic microscope).