G - Physics – 01 – N
Patent
G - Physics
01
N
349/42
G01N 29/04 (2006.01) G01H 1/00 (2006.01) G01N 29/00 (2006.01)
Patent
CA 1175135
ACOUSTIC EMISSION WARNING SYSTEM FOR A FIBERGLASSMEMBER ABSTRACT OF THE DISCLOSURE An apparatus is provided for use as an on- board monitor and warning system attached to a fiberglass member to detect potentially hazardous loads by detecting and counting acoustic emis- sions produced in the member by the breakage of glass fibers. The monitor and warning system produce a warning signal when the number of acoustic emissions detected in a selected per- iod of time indicates the existence of a poten- tially hazardous load. The apparatus includes a piezioelectric transducer which may be placed in contact with the surface of the fiberglass to produce electrical signals corresponding to pressure waves detected. Means are provided for distinguishing by the electrical signals those pressure waves which are acoustic emis- sions associated with the breakage of glass fibers from all other pressure waves. Further means are provided for counting each electrical signal associated with fiber breadage, for se- lecting a period of time during which the elec- trical signals associated with fiber breakage will be accumulated, and for producing a warn- ing signal when the number of electrical sig- nals associated with fiber breakage during the selected time period indicates the existence of a potentially hazardous load.
380857
Gowling Lafleur Henderson Llp
Mcelroy John W.
LandOfFree
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