US 12,216,148 B2
Apparatus and method for detecting holidays in liners
Jimmie Gordon Youngblood, Jr., Kingwood, TX (US)
Assigned to Solmax International Inc., (CA)
Filed by Solmax International Inc., Varennes (CA)
Filed on Jun. 2, 2021, as Appl. No. 17/336,683.
Prior Publication US 2022/0390499 A1, Dec. 8, 2022
Int. Cl. G01R 31/12 (2020.01); G01R 19/165 (2006.01); G08B 3/00 (2006.01); G08B 5/36 (2006.01)
CPC G01R 31/1227 (2013.01) [G01R 19/165 (2013.01); G08B 3/00 (2013.01); G08B 5/36 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of detecting holidays in a liner having uneven contours, comprising the steps of:
creating a circuit for current from a generator to a first contact with said liner to a second contact spaced from said first contact to said generator, said second contact being an electric reference for said generator;
pulsing current from said generator to said liner first contact as said first contact is moved over and maintains uniform contact with said liner, wherein said liner is a geomembrane on a geotechnical site, and said first contact is a flexible moveable contact that conforms to the uneven contours of said liner, wherein the first contact includes a truck rolling on guide wheels and a plurality of conductive rollers spaced along a flexible conductive cable supported between said guide wheels;
detecting a plurality of at least one electric signal associated with said pulsing current from said electric reference;
continuously processing a selected recent plurality of said detected electric signals to generate a baseline value for said at least one electrical signal, wherein a detected electric signal having a value on one side of the baseline is deemed to indicate no holiday and an electric signal having a value on the other side of the baseline is deemed to indicate a holiday; and
actuating a holiday signal when at least one of said detected electric signals has a value on said other side of said baseline.