Method and device for cable length measurement based on...

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se

Reexamination Certificate

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Details

C324S539000, C324S543000, C324S534000, C702S158000

Reexamination Certificate

active

07098645

ABSTRACT:
An offline phase of a cable length measuring method involves a determination of a plurality of preset frequency test signals for facilitating the length measurement of the cable based on a maximum measurable length of the cable. An online phase minimally involves a measurement of the length of the cable based on a first reflected phase shift between a first preset frequency test signal as transmitted at a transmission end of the cable and a first preset frequency reflection signal representative of a reflection of the first preset frequency test signal at a reflection end of the cable, and based on a second reflected phase shift between the second preset frequency test signal as transmitted at the transmission end of the cable and a second preset frequency reflection signal representative of a reflection of the second preset frequency test signal at the reflection end of the cable.

REFERENCES:
patent: 2003/0222654 (2003-12-01), Furse et al.
patent: 2004/0230383 (2004-11-01), Bechhoefer et al.
patent: 2005/0242825 (2005-11-01), Bottman et al.

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