New Technique Study On Noise Detecting And Analysis Of Motorcycle

Design method of system software develop tool of virtual apparatus used in motorcycle noise analyze is introduced in this paper. Use the object-oriented program design thinking, researching and designing the software develop platform of virtual apparatus with VC++ language in Windows operating system, under these work, A visual "virtual apparatus software develop platform" used in motorcycle noise analyze and diagnose is developed. Using this software develop platform, all kinds of noise analyzing virtual apparatus can be created expediently. "Created base on required , usable immediately after created" is the most characteristic of this system, user is no only the "user" of the apparatus, but also the deviser, an then, all operation of user can process on the virtual apparatus software develop platform, system can provide the functions such as "component stocking", "component assembling", "macro-system adjusting" etc; provide full-function, abundance-content "virtual component library" involving knob, switch, slide, pointer, display etc, the system can divide into two main part: main- control frame and "virtual component library", witch independent and contacted by minimize tache module. Main- control frame view belong to man-machine interface, it is the core of man-machine interface. Actually there are one specifically function corresponding to one instance(namely one component), component library are composed by means of aggregating all component. Select component needed by oscillograph panel and display screen from component library , adjusting it size, color and position, linking all virtual component according to rule, linking inner component of virtual apparatus, add instantaneous signal test DAO panel, a virtual oscillograph can be created. By the same means different virtual apparatus such as virtual frequency spectrum apparatus can be created.In chapter 2, foundational theories of noise signal analyze are discussed, corresponding analyze software is written, combine to virtual apparatus system, motorcycle noise analyze virtual frequency spectrum apparatus, virtual correlation analyze apparatus and virtual power spectrum apparatus are created.In chapter 3, wavelet theories are discussed, combine to motorcycle noise analyze, corresponding analyze software is written.In chapter 4,Si micro-array theories are discussed, new ideals about Si micro-array sound-passed filter used in motorcycle noise analyze is presented, primary design are...