Fault location methods and apparatus using current pulse injection
US4377782A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1980 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Jun 20, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2273
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A probe for sensing direction of flow of an injected current pulse along a conductor of a circuit under test is linked to an ATE, to be triggered to inject the pulse during a test sequence at a step previously found by the ATE to establish a faulty state in the circuit. Thus, the faulty one of several components connected to a circuit node can be identified. The probe itself can also be used independently, and injects an approximately triangular-waveform current pulse which has a steep rising edge and a less steep falling edge, thereby inducing a voltage pulse which is asymmetric about the zero voltage level and thus permits discrimination of the direction of current flow. The probe may have a single current injection contact disposed between the limbs of a bifurcated core for the pick-up coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.