Patent ID: 11971441
Assignee: QUALCOMM INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A device, comprising:
a distance measurement circuit; and
a processor connected to the distance measurement circuit, the processor configured with processor-executable instructions to:
inject an initial tone into a first end of the two-conductor wire, the initial tone having an initial known signal phase;
measure a signal phase of an initial reflected tone at the first end of the two-conductor wire resulting from injecting the initial tone;
determine an initial phase difference as a phase difference between the initial known signal phase and the measured signal phase of the initial reflected tone; and
determine a distance to the short in the two-conductor wire based at least in part on the determined initial phase difference;
wherein:
the initial known signal phase is an initial known voltage phase; and
the measured signal phase of the initial reflected tone is a measured voltage phase of the initial reflected tone;
the initial tone has an initial frequency, the processor is further configured with processor-executable instructions to:
inject a second tone into the first end of the two-conductor wire, the second tone having a second initial voltage phase and a second frequency different from the initial frequency;
measure a voltage phase of a second reflected tone at the first end of the two-conductor wire resulting from injecting the second tone; and
determine a second phase difference as a phase difference between the second initial voltage phase and the measured voltage phase of the second reflected tone,
the processor is configured with processor-executable instructions to determine distance to the short in the two-conductor wire based at least in part on the determined initial phase difference by determining the distance to the short in the two-conductor wire based at least in part on the determined initial phase difference and the determined second phase difference.