Dissertation > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship performance test equipment

Design of an Analog Torsional Vibration Measuring Instrument

Author LengWei
Tutor LiWanYou
School Harbin Engineering University
Course Marine Engineering
Keywords Vibration Torsional vibration measuring instrument Simulation Signal processing
CLC U661.7
Type Master's thesis
Year 2012
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Torsional vibration is extremely harmful to the ship’s shafting. whichaffects not only the steady running of the shafting,but also the safety of thecomponents and structures. It even causes a lot of serious malfunction.Torsionalvibration monitoring has become one of the important works to the shafting faultdiagnosis. Torsional vibration Meter is a commonly used equipment fortorsional vibration measuring,which can real-time monitor the changing ofshafting’s torsional vibration.Based on the measuring signal of the diesel’s shafting torsional vibration,this dissertation focuses on using the software, Simulink, to emulate a type ofanalog torsional vibration meter. The flow chart of signal is as follows:signal ofthe sensor (source)-clamp protection circuit-double stabilization trigger—single stabilization circuit-low pass filter circuit-amplifying circuit-integralamplifier-oscilloscope.Software Multisim is used to design and optimize theconcrete structure.The printing circuit board is obtained for production,soldering,debug andtesting.Compared with a similar torsional vibration meter which is made inChina,the results show that the torsion vibration measuring instrument has thewider range of measuring rotation speeds,more powerful ability of the signalanti-interference,clearer signal and so on.After being calibrated,the waveformis better than the similar other instrument.The developed torsion vibrationmeasuring instrument,applied to the torsion vibration monitoring of the diesel’sshafting,has plays a important role in practical engineering and research field.

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