Based On Field Balancing Of Virtual Instruments Tester Development

It has been proved that Unbalance defect of rotor is one of the main reasons that cause the vibration of rotating machinery. So the strict dynamic balance on the rotor is needed in its manufactory and use. The field whole-machine balancing method is practically been applying more and more widely because of its high precision, low cost, and fast effect.At present, although have got good effect, the most balancing instruments practically applied still belong to the category of traditional instruments, and have some disadvantages. For example, because of the limit of their CMOS chip performances and the capability of their memorizers, this kind of balancing instruments based on singlechip machine are not fit for large digital operations in signal processing, and have difficult in test faint signal of vibration, and their expansibility are not good.Now, with computers being introduced into electronic measurement field, the virtual instruments (VI), computer acquisition test analysis instruments, was born.In order to fit the demand of dynamic balance and improve the accuracy of the measure result, this paper combined the the technique of virtual instruments with that of field whole-machine dynamic balancing, and a set of dynamic-balancing measuring and test instruments on technique of VI was developed by Lab VIEW.Compared to the traditional dynamic balancing instruments, this instruments has the more friendly soft panel, and can be used more conveniently; has two mode to get digital signal, one is by acquisition clip and the other by series communication; use Crosscorrelation analysis to improve the accuracy of the measure results; use software method to eliminate the bad influence caused by missing signals; have multiple methods of dynamic balance; have some functions of fault-diagnosis; and combined Lab VIEW program with database using DLL.It has been proved that the balancing instrument can be used more conveniently, has complete functions and can obtain satisfying result. So it will be a new product soon.