Research Of Data Acquisition System Used For Full Vector Dynamic Balancing

Currently, large rotating machinery is rapidly developing toward the direction of high efficiency, high power, high accuracy and automation, while the rotor, which is the core member of rotating machinery, the important factors of the rotor failure is the mechanical vibration, according to the production experience, mostvibration fault is caused by unbalanced rotor; Therefore, the eliminating of vibration caused by the unbalance measurement is extremely important. In the existing balancing instrument, the vibration information is always obtained through a single source signal by a single sensor, while the stiffness of rotor system is not the same, the amount of information is incomplete, then there are error and reduction of the balance accuracy; as one of full information technology, full vector spectrum combines dual-channel information on the same cross-section of the rotor, this technology has a wide range of applications in fault diagnosis, full vector dynamic balancing methed is based on the full vector spectrum, combined with the traditional influence coefficient method, and has higher balance accuracy than traditional balance methods. In order to achieve effective integration of homologous information, full vector dynamic balancing method puts forward new requirements on vibration acquisition system:Different from the traditional single-channel signal, full vector dynamic balancing method needs double number of the signal, which requires the data acquisition system to achieve the ability of acquisiting synchronization entire cycle information; in order to improve the phase accuracy of dynamic balancing, the keyphasor signal shoule be handled specially.In the view of the drawback of the current instrument for dynamic balancing in data comprehensive, data synchronicity and data accuracy, based on the full vector dynamic balancing method, and in order to rise the balance accuracy impacted by the balance model, theoretical error and balanced parameterserror, this article completes the design and development of the embedded vibration acquisition system according to the need of full vector dynamic balancing. This paper mainly includes the following content:In order to improve the balance accuracy and efficiency, the functional requirements of thesystem was analyzed, and made overall planning, determined the basic structure with ARM11and WinCE6.0.The hardware platform of system is constructed. Based on the structure and characteristics of the the ARM11microprocessor (S3C6410), completed the design of each hardware module with the ARM11core, including sensor selection, module of data acquisition and pre-processing, storage module, touch screen, the communication module, the power module and so on.The software platform based on WinCE6.0perating system is built. On this basis, we completed some drivers that system requires, such as A/D driver. Finally, a brief introduction to the function of the system application process is introduced.