Laserfiche WebLink
• • 1 <br /> Leak Location Data Example ' <br /> This is an example of the typical output from data—processing , <br /> operations performed by the computer software. <br /> The computer divides the tank floor area into eight sectors which are ' <br /> related to the sensor positions as illustrated in Figure A-1. Each sector <br /> is further divided into 1320 subareas, each defined by a data point (10,560 <br /> points in the entire tank floor). After the source of an individual <br /> transient acoustic "event" generated by a leak(s) has been located by t <br /> ray—path analysis, the event is assigned to the sector and the data point <br /> closest to its computed position. Following statistical evaluation by the ' <br /> software, which process involves both the number of events accumulated at <br /> individual data points and the test—time history/energy levels, a leak is <br /> determined to exist (Figures A-2 and A-3). Figure A-2 illustrates a ' <br /> cluster of eleven (11) leak—generated data points each of which has been <br /> assigned numerous leak events; i.e. independent locations. The cluster has 1 <br /> an accumulated 108 events. Figure A-3 shows the single data point <br /> determined to be the most active, i.e. , the point nearest the actual hole. ' <br /> Figure A-4 is an example of the actual final map provided for the , <br /> customer which details the location of the leak using rectangular <br /> coordinates which are related to the tank features such as manways and ' <br /> inlet/outlet pipes. <br /> 1 <br /> 1 <br />