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Crank the host power output hub, the operation of the diesel engine crankshaft main bearings and low ranges, or ballast change, hull deformation to produce crankshaft overall deformation. Crankshaft Shui file difference reflects the important parameters of the crankshaft is in good condition, the deflection is greater the difference, suggesting that the more serious the crankshaft deformation. By measuring the crankshaft deflection is poor to understand the state of the axis of the crankshaft overall the crankshaft fracture prevention, thereby reducing economic losses and to prevent accidents. Object-oriented language Visual Basic (VB) as the tool to the diesel engine crankshaft deflection is poor as the research object, crankshaft deflection is difference carried out the data analysis, the difference on the crankshaft design of the data processing system. First, starting from the importance of the crankshaft, crankshaft deflection difference between the concepts and methods of measurement and influencing factors, and data processing of several commonly used method, laid a theoretical foundation for the rest of this article. Then describe a variety of serial interface standards and electrical specifications based on the design of the serial communication circuit. Standards and provided by VB MSComm control, according to the usage of properties and events, based on VB serial communication serial communication. Using VB interface preparation and design of the various modules of the data processing system, mainly including: user login, data entry, data mapping, data storage and maintenance of five functional modules. The system may be substantially crankshaft deflection difference data processing, for the bending of the crankshaft direction and size. Finally, a brief introduction to the basics of the BP neural network, BP neural network, highly nonlinear fitting functions, will be introduced to the forecast of marine diesel engine crankshaft bearings off the center line. BP neural network, a network design and actual forecast, measured the data and a series of work. Programming in MATLAB environment, the use of data measurements taken to establish the BP training network, BP neural network data samples of marine diesel engine crankshaft bearings deviation from the center line of the forecast. Understand and control the deformation of the crankshaft and main bearing wear condition, to prevent fatigue failure of the crankshaft, thus preventing the broken shaft accident, to protect the safety of the ship is to provide a theoretical foundation.
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