Research On Monitoring And Analyse System Of The Parameters During Inertia Friction Welding Base On Virtual Instrument Technology

It has been developed and researched deeply to the parameter detection system of CT-25 special friction welder in this paper.During the course of friction welding,the frictional pressure, the rotational speed of the main shaft and the burned displacement amount etc.are the very important parameters who can influence the welded joints'quality.So developing a set of advanced friction welder parameter detection and analyticl system with stronger function has important meanings for improving the quality of welding, studying the new welding craft and improving the management level etc.In the paper,it has been introduced detailedly to the overall ideas of the design and How to design In software and hardware to the parameter detection and analyticl system. The systematic hardware is mainly made up of Industrial Personal Computer, PCI2013 multi-functional data acquisition card and pressure, rotational speed and displacement sensors. Among them the rotating speed sensor adopts LEC-50BM-G05E incremental photoelectric rotary encoder, the pressure sensor adopts the pressure sensor of ST2001, the displacement sensor and the digital display meter adopt SGC series grating scale and the GS4204 grating digital readout-instrument separately.The software part can be realized with the the programming software LabVIEW of NI corp. Virtual Instruments(abbreviated as VI) technology is the result which is combined with the technology of measuring control and the computer technology. Its appearance indicates the technology of measuring control enters a new era . As the representative development software of the VI technology LabVIEW adopts the module, figure programming way. the measurement and control systems witch have been developed with LabVIEW have the human-computer interaction interface with friendship. When users'testing requirements change, it can easily change their hardware and software modules or re-allocation of existing systems by the users to meet new testing requirements. In this paper, it has realized these functions such as the detection of the parameter of rotational speed, pressure at all levels and the burned displacement amount in the course of the friction welding, the curve real time display ,the date preservation ,the Playback of the data after welding and the firsthand information dossier of the products and so on by writing the programme with LabVIEW7.1 software. In this paper, It has realized the functions such as the detection of the parameters of the rotational speed, pressure at all levels during the friction welding process and the burned displacement amount, the curve real-time display,the date storage, the playback of data after welding and the products'firsthand information archival records etc.During the course of the program development,it introduced the dynamic link library technology, multithread technology, multi-task processing technology,serial port communication technology and digital filtering technology and derived a mathematical model to solve the problem of acquisition data delay.It also analyzed the interference source and toke the corresponding defending measure to the interference source in the real working environment in the paper.Eventually the paper has also carried on the simulation verification test to measurement and control system. Has further confirmed system's validity and the good operationality through the test.