RESEARCH AND BUILD A MULTI-CHANNEL VIBRATION MEASUREMENT SYSTEM FOR DYNAMIC STUDYING OF THE MARINE PROPULSION PLANTS

  • 31/03/2022
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Giới thiệu

THE ARTICLE PRESENTS THE RESULTS OF THE RESEARCHING AND BUILDING A MODERN MULTICHANNEL VIBRATION MEASUREMENT SYSTEM (MVMS), BASED ON THE STANDARD INDUSTRY HARDWARE (SENSORS AND COMPUTER), WITH THE DATA ACQUISITION (DAQ) AND THE SOFTWARE LABVIEW OF NATIONAL INSTRUMENTS (USA). THE MVMS CONSISTS OF TWO MEASUREMENT SUB-SYSTEMS. THERE FIRST SUB-SYSTEM INCLUDES A SET OF SENSORS, DAQ NI-9234 AND CHASSIS CDAQ 9184 (ETHERNET), USED TO FORM A SYSTEM WHICH HAS TOTAL 16 MEASUREMENT CHANNELS. IN THIS SUB-SYSTEM, THE SENSORS ARE MOUNTED ON THE NON-ROTATE PARTS OF THE MEASUREMENT MACHINE. THE SECOND SUB-SYSTEM CONSISTS OF THE STRAIN GAUGES TO MEASURE THE SHEARING AND AXIAL STRESSES OF THE LOADED ROTATE SHAFT, DAQ NI-9237 (DSUB, 4 CHANNELS) AND THE CHASSIS CDAQ 9191. THIS SUB-SYSTEM ROTATES TOGETHER WITH THE SHAFT. THE NI-9237 HAS 04 CHANNELS WITH THE WHEATSTONE BRIDGE (FULL, HAFT OR QUARTER MODES) OF THE STRAIN GAUGES. THE HIGHEST SAMPLE RATE OF THE DAQ 9237 IS FS= 50 KILO-SAMPLES/S/CHANNEL BUT FOR THE DAQ 9234 THIS FS= 51.2 KILO-SAMPLES/S/CHANNEL. THE OUTPUTS FROM THE TWO DAQS ARE TRANSFERRED TO WI-FI ROUTER AND FROM THIS ROUTER TO COMPUTER THROUGH AN ETHERNET LINK. WE USE THE MVMS TO CARRY OUT SOME EXPERIMENT RESEARCHES OF THE DIFFERENT VIBRATIONS TYPES ON THE DIESEL-GENERATOR SET AND ON THE MAIN DIESEL PROPULSION PLANT OF THE TRAINING SHIP “SEA STAR” WHICH BELONGS TO VIETNAM MARITIME UNIVERSITY (VMU). THE MVMS SOFTWARE HAS MANY USEFUL FEATURES, SUCH AS: AUTOMATIC SETTING DEVICES; PROCESSING OF THE MEASURED SIGNALS IN THE REAL TIME DOMAIN, FFT, CEPSTRUM, 1/3 OCTAVE, ORDER ANALYSIS; SAVE DATA TO FILES; READ DATA FROM FILES AND REPORT THE RESEARCH RESULTS. THE OBTAINED RESULTS WILL BE USED TO DESIGN THE VIBRO-MONITORING AND DIAGNOSTIC EQUIPMENT. IT ALSO CAN BE USED TO ESTIMATE THE MACHINE POWER WITH THE TRAINING AND EDUCATION PURPOSES OF THE HIGH QUALITY HUMAN RESOURCES (THE POST-GRADUATED AND PHD STUDENTS, ETC.) AT THE VMU, AND OTHER INDUSTRY PURPOSES. 2017 NIKOLA VAPTSAROV NAVAL ACADEMY. ALL RIGHTS RESERVED.

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