Research And Development Of Inspecting And Testing System Based On Virtual Instrument For Mechanical Manufacturing

As a result of the combination of computer technology and instrument technology, Virtual Instrumentation technology has broken through old concept of instrument and will become artery of test system. Traditional mechanical testing technology is stepping into rapidity, automatization, intelligentization and integration. This thesis designs an inspect and test system based on Virtual Instrument and the programming language-Lab VIEW for mechanical manufacture.Firstly, the thesis examines the characteristics and problems of the present mechanical testing system, points out the feasibility of Virtual Instrument, and explains the concept of VI, its hardware and software structure, its characters and applications. It also compares the different features of the 3 most popular projects, and develops a system based on the multi-function data acquisition card and the graphic programming language-Lab VIEW. The principle of this system is: Use DAQ card to acquire physical analog and digital data coming from couples of sensors, appropriately process the data, then transmit it to computer by PCIBUS, the data is dealt with by the software of system. In the following chapters, the inspecting and testing system is illustrated at length, including the design of hardware structure, mainly the makeup of hardware part and the realization of acquiring outer physical signal. And the graphic programming language-Lab VIEW is introduced. In addition, the functions of Virtual Instrument system are listed in detail on hardware structure and software function.The thesis also explains the actual data-processing process, analyses and compares the data acquired by some experiments and simulations finished by the system, thus test its performance. Finally, the conclusion can be safely drawn that the system is proved to be successful, while the prospect of virtual analysis instrument is provided at the same time.