A Labview Based Data Acquisition System for Monitoring and Analysis of Vibration Signal

Abstract

Machine plays a vital role in the plant. Machine maintenance process is a very important factor for a plant, which is required regularly. Vibration monitoring and analysis is a predictive maintenance technique by which the faults can be detected in the machines. In this work, the vibration fault simulation system is developed for vibration signal monitoring. The structure of vibration monitoring system is discussed. The important components of vibration monitoring system are accelerometer transducer, charge amplifier, data acquisition card (DAQ) and computer. Data acquisition system, signal analysis and LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) are used to detect various faults which occur in the machine. For processing and analysis of vibration signal, time domain and frequency domain analysis of vibration signal is implemented in LabVIEW. From time domain analysis it is difficult to find the exact fault of the vibration signal. It is also difficult to locate the faults region and fault type. For avoiding the difficulties in time domain analysis, frequency domain analysis is performed. Spectrum analysis has provided more accurate information about the vibration signal type, signal fault region and fault extent as compared to time domain analysis. The control action for a faulty vibration signal is implemented using PID controller with different modes such as manually, automatically, using generator sine and using generator square. Automatic controller has provided better response than other controller. This controller has taken very less time to complete the control action.