Title:
テーブルタップ及び電力測定方法
Document Type and Number:
Japanese Patent JP5661812
Kind Code:
B2
Abstract:
[Problem] To calculate power consumption with high accuracy at a jack portion in a power strip and in a power measurement method. [Solving Means] The problem is solved by a power strip including: a second power line 12 between which and a first power line 11 a power supply voltage is applied; a jack portion 1a; a current meter 30 configured to measure a current being supplied to an external electrical device from the jack portion 1a; a first photocoupler 41 including a first light emitting diode 41a connected between the first power line 11 and the second power line 12 and configured to output a first output signal S 1 whose level is changed when the power supply voltage exceeds a first threshold V 1 ; and a computing unit 33 configured to calculate a power value by using instantaneous values I(t) of the current measured by the current meter 30 and instantaneous values V(t) of the power supply voltage estimated from the length X 0 of a period when the level of the first output signal S 1 is changed.
Inventors:
曾根田 弘光
壷井 修
中澤 文彦
長尾 尚幸
堀 正和
壷井 修
中澤 文彦
長尾 尚幸
堀 正和
Application Number:
JP2012555671A
Publication Date:
January 28, 2015
Filing Date:
February 04, 2011
Export Citation:
Assignee:
富士通株式会社
富士通コンポーネント株式会社
富士通コンポーネント株式会社
International Classes:
G01R21/00; G01R21/08; G01R21/133
Domestic Patent References:
| JP2000221218A | 2000-08-11 | |||
| JPH06258362A | 1994-09-16 | |||
| JP2008261826A | 2008-10-30 | |||
| JP2001228183A | 2001-08-24 | |||
| JPH09189723A | 1997-07-22 | |||
| JP2000221218A | 2000-08-11 | |||
| JPH06258362A | 1994-09-16 |
Attorney, Agent or Firm:
Keizo Okamoto