G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/08 (2006.01) H04B 3/46 (2006.01)
Patent
CA 2183715
A device and method are provided for locating faults in a paired line. The fault locating device has a base unit and a terminator unit connectable to the conductors of a paired line containing the fault. The device also has a portable locator unit movable along the paired line between the base unit and the terminator unit. The locator unit contains a coil positioned at the paired line for coupling an induced signal thereon. The base unit and terminator unit each contain circuits for receiving the induced signal from the locator unit and measuring a selected characteristic of the induced signal. The base unit additionally has a circuit for creating a base carrier signal having the selected characteristic measured at the base unit and terminator unit encoded thereon. In operation, the base unit sends the encoded base carrier signal to the locator unit which decodes and continuously communicates values of the induced signal characteristic to the operator by means of an audible or visual indicator. The operator incrementally repositions the locator unit away from the base unit and toward the terminator unit as operation of the device proceeds. When the locator unit approaches the fault, the intensity and frequency of the indicator remains relatively stable except for some variation due to conductor twist and relative coil position. When the locator unit passes the fault, however, such that the fault is between the locator unit and the base unit, the intensity or frequency of the indicator abruptly drops, thereby establishing the precise location of the fault.
Crick Robert G.
Gowling Lafleur Henderson Llp
LandOfFree
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