Advanced ND T Syste m s Gear Inspe c tion Cleaning Crack Detection Program Dragline Insp ections Mobile Mi ne Equi pme n t In spections Heat Ex chang e rs Tub e s In spections Wire Ro p e In s p ections Head Office Kelowna BC Canada tomglobal ndtca 250 762 552 5 Regina SK 306 209 699 5 p Allisonglobal ndtca Brossa rd QC infoglobal ndtca Chile Office Alonso de Cordova 5900 402 Las Condes Providencia Santiago Chile Calgary Office 403 651 856 8 jasonglobal ndtca The three ga u g e s mea s uring 1 2 and 6 inches are then aligned with 1 inch spacing between the parallel placed gauges A spot weld er wa s used to mount the gauges to the areas of concern Once mounted a protective layer of Teflon tape was applied over the gauges followed by a coating of rubber seal ant Lead wires were then attach ed to the gauges followed by another layer of rubber and lastly aluminum tape The last step in the process is to sp ot weld the Mote in close proximity to the three gauges The Data The following figure sh ow s wirel e ss cra c k propagation data collected over a period of approximately 5 hours during an acc e le r a te d test The cr ack gauge se n s or s CG1 CG2 and CG3 coloured blue pink an d yellow respect i vely were placed strat e g i cally so that CG1 was situated immediat el y at the end of the cra c k CG2 was one inc h away from CG1 and CG3 was placed one inch away from CG2 The X axis repres ents the time it took for th e integrit y of each of the gauges to be breeched indicating a propagation of the cra c k at that ex act point in time and distance The Y axis units have been simplif ied for illustrative purposes to indicate the two possible states that the crac k gauges can exist in open or closed circuit for any meaningful period of time As you can see from the figure the first cra c k ga u g e was br eech e d at approximately 25 hours the second at 47 hours and the last at 52 hours HAUL TRUCK DATA Motes with Crack Sens ors were in stalled on a haul truck at a major Oil Sands production facility Crack propagation data was taken at 10 minut e intervals with data being transmitted to a laptop computer Global Inspe c tions server uploaded the data ever y 3 days The Crack Propagation Data was th en analyz ed by the t e ch nicians and the results r e present e d in the following ba r chart format