Study On Data Exchange System Based On Precision Detection And Monitoring

Precision machining technology has become the base and key point of advanced manufacture field along with the development of modem manufacturing. The accuracy requirements of workpiece surface and roughness have rised because of the adoption of new high strength materials and the appearance of new processing method constantly. So how to control the machining accuracy has become the research focus in the processing field all over the world.The main method of precision testing and monitoring are studied in this paper on the base of anlysis on main errors and characteristics. A data exchange system is designed hereby which is suitable for pecision testing, the details are liseted as follows:(1) The improtance of precision testing technology in precision machining field is analyzed while the development situation of test instruments both at home and abroad, data acquisition & exchange technology are introduced.(2) The methods of signal acquisition and processing in the mechanical testing field are studied, including signal acquisition, data preprocess and signal time-frequency domains analysis.(3) Study the main error sources which influence the machining precision, emphatically analyze the thermal error and vibration error. According to the error characteristics, the hardware adoptance, the design of data acquisition module and communication module are completed.(4) The software system is structured in blocks under the Visual C++ development environment, including data acquisition module, data processing module and file management module.The test experiments are carried out and the system error sources are analyzed in the final. The results show the high validity and repetitiveness of the data exchange system both in analog signals and digital signals.