The Vibration Signal Testing And Analyzing System For Great Rotating Machine

The paper illustrates the purpose and meaning to develop the technology of device status monitoring, and the developing foreground and applying status in the state and international enterprise. Discusses the general structure elements of the computer aided signal testing and analyzing system, and the ordinary analyzing method of vibration signal for great rotating machine. A vibration signal analyzing system for great rotating machine is developed based on the methods. The paper designed the general scheme of the system, and the system is compatible with several different A/D converters. The system is not only used as a spot timely signal monitor and memorizing apparatus but also a offline analyzing system. The system software has the following six functions: the spot data sampling, history data management, data analyzing, remote data transmission, the sensor calibrating, the spot dynamic balancing etc. The data sampling module contains the data sampling configuration,transient data sampling and smooth data sampling. The time field analysis module contains the timely wave return,digital filter,axis center track analyzing,demodulation analyzing,trend analyzing,mutual analyzing. The frequency filed analyzing contains the frequency spectrum analyzing,complete information analyzing,frequency room analyzing. The transient analyzing contains the waterfall chart analyzing,bode chart analyzing,polar coordinates chart analyzing. The enterprise can transport vibration data to remote diagnose center by remote data transmission module, the remote diagnose center can send diagnosing results to enterprise by the module. According the facts of the balance spot, a dynamic balance method without remove the testing weights is put forward in the paper for less balance testing time and better balance precise. Several key technology is discussed in the paper such as multiple A/D converter compatibility and A/D type auto identification,dynamic balance method without remove the testing weights,the theory and software reality of remote data transmission,the theory and software reality of RS232 communication interface. During the testing running of the system, several spot tests made all functions verified and consummated. The CDMS2002 system is testified as a system with precise analyzing results,high calculating speed and easiness to use. It satisfied the need of enterprises and was praised by the users...