Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1997-10-02
2000-01-18
Do, Dep N.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324 66, 324523, 379 25, G01R 3102, H04M 124
Patent
active
060160586
ABSTRACT:
In-service verification/continuity testing apparatus and method for testing the continuity integrity of wiring installed to an in-use operational circuit. The apparatus measures the voltage difference created by injecting two equal but opposite insignificant currents through a test path. A current loop is created by placing an isolated ground, which is referenced to unique detection circuitry provided in the testing apparatus. An accurate voltage differential calculation is accomplished by using a sample and hold circuit in parallel with switching the injected currents. Biasing the detection circuitry using two identical but inverse voltages with a reference to the isolated ground allows the detection circuit to subtract out extraneous currents flowing through the wiring path due to external voltage and current sources.
REFERENCES:
patent: 4130794 (1978-12-01), Cox
patent: 4208553 (1980-06-01), Kaplan
patent: 4652813 (1987-03-01), Bakke et al.
patent: 5309499 (1994-05-01), Webber
patent: 5488307 (1996-01-01), Plott
patent: 5625667 (1997-04-01), Vogt, III et al.
patent: 5764725 (1998-06-01), Martin, Jr. et al.
Bilicska Carl Joseph
Kasprzyk Randolph Leonard
Sussman Robert Bradley
Do Dep N.
Lucent Technologies - Inc.
LandOfFree
In-service wiring verification circuitry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In-service wiring verification circuitry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In-service wiring verification circuitry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-565408