Power strip and power measurement method
AssigneesFujitsu Limited, Fujitsu Component Limited
InventorsHiromitsu Soneda, Osamu Tsuboi, Fumihiko Nakazawa, Naoyuki Nagao
Life of this patent
Estimating the term…
Abstract
A power strip includes: jack portions; current meters each configured to measure a current being supplied from the corresponding jack portion to one of external electrical devices, and to output a measurement signal corresponding to a magnitude of the current; and a computing unit configured to obtain instantaneous values of the current at a plurality of time points on the basis of the measurement signal, and to calculate a power value using the instantaneous values. The computing unit configured to obtain the instantaneous values-of the current by using any one of a first zero point and a second zero point as a reference.
Claims20
A power strip comprising:
- a jack portion;
- a current meter configured to measure a current being supplied from the jack portion to an external electrical device, and to output a measurement signal corresponding to a magnitude of the current;
- and
- a computing unit configured to obtain instantaneous values of the current at a plurality of time points on the basis of the measurement signal, and to calculate a power value using the instantaneous values,
- wherein the computing unit is configured to obtain the instantaneous values of the current by using any one of a first zero point and a second zero point as a reference.
A power measurement method comprising:
- obtaining measured values of a current at a plurality of time points, the current being supplied from each of a plurality of jack portions to an external electrical device, and thereby acquiring a measurement signal corresponding to the measured values;
- obtaining instantaneous values of the current at the plurality of time points from the measurement signal by using any one of a first zero point and a second zero point as a reference;
- and
- calculating a power value individually for each of the plurality of jack portions by using the instantaneous values.
Dependencies are inferred from the claim text.