Electric power measurement system, electric power measurement method, and information processing device

Patent metadata

Field	Value
Publication number	US-9513141-B2
Application number	US-201013513584-A
Country	US
Kind code	B2
Filing date	Oct 15, 2010
Priority date	Dec 2, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

An electric device has an electric power measurement unit with an electric power detection element measuring consumed electric power and an information communication element transmitting the measured power. An electric power meter has an information communication element measuring and transmitting total electric power consumed indoors. An information processing unit stores the measured values in every predetermined sampling period. If a difference α of two measurement values of the electric power detection element is a finite value, the information processing unit calculates and stores both a difference β of two measurement values of the electric power meter corresponding to the two measurement values and β/α, and calibrates the amount of electric power consumed by the electric device and that is measured by the electric power detection element using a median of values of β/α obtained in a predetermined measurement period or a median of a predetermined number of values of β/α.

First claim

The invention claimed is:

1. A home appliance electric power measurement system, comprising:
an electric device provided with an electric power measurement unit that has an electric power detector that constantly measures the amount of consumed electric power, a temperature measurement device that measures an ambient temperature of the electric device, and a first information communication transmitter that transmits a measurement value of said electric power detector;
an electric power meter, which has a second information communication transmitter, that constantly measures a total amount of electric power consumed indoors and transmits the measurement value;
an electric power generator provided with a generation electric power measurement unit that has a generation electric power detector that measures the amount of generated electric power and a third communication transmitter that transmits a measurement value of said generation electric power detector;
a selling electric power meter provided with a fourth information communication transmitter that measures surplus electric power of electric power generated by said electric power generator in a predetermined accuracy and transmits the surplus measurement value; and
an electric power information processing unit that stores the measurement value measured by said electric power detector and transmitted from said electric power measurement unit and the measurement value of said total amount of consumed electric power transmitted from said electric power meter in every predetermined sampling period, and that repetitively calibrates the amount of electric power that is consumed by the electric device and that is measured by the electric power detector based on a difference α of two measurement values that is measured by the electric power detector, based on both a difference β of two measurement values of said electric power meter corresponding to the total amount of electric power consumed indoors and based on β/α; and
a display device that displays the calibrated amount of the electric power that is consumed by the electric device.

2. The home appliance electric power measurement system according to claim 1 , further comprising:
wherein said electric power information processing unit stores the measurement value measured by said generation electric power detector and transmitted from said generation electric power measurement unit and the measurement value of said surplus electric power transmitted from said selling electric power meter in every predetermined sampling period, when a difference γ of two measurement values of said generation electric power detector is a finite value, calculates and stores both a difference β that is a finite value of two measurement values of said electric power meter or two measurement values of said selling electric power meter corresponding to the two measurement values and β/α, and calibrates the amount of electric power that is generated by said electric power generator and that is measured by said generation electric power detector using a median of a plurality of values of β/α obtained in a predetermined measurement period or a median of a predetermined number of values of β/α.

3. The home appliance electric power measurement system according to claim 2 ,
wherein when a characteristic detected by said electric power detector is nonlinear, said electric power information processing unit calculates and stores a median of said plurality of values of β/α in each of predetermined measurement electric power ranges of said electric power detector and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β/α obtained in each of said measurement electric power ranges.

4. The home appliance electric power measurement system according to claim 2 ,
wherein said electric power information processing unit calculates and stores a median of said plurality of values of β/α in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β/α obtained in each of said measurement electric power ranges.

5. The home appliance electric power measurement system according to claim 2 ,
wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

6. The home appliance electric power measurement system according to claim 1 ,
wherein when a characteristic detected by said electric power detector is nonlinear, said electric power information processing unit calculates and stores a median of said plurality of values of β/α in each of predetermined measurement electric power ranges of said electric power detector and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β/α obtained in each of said measurement electric power ranges.

7. The home appliance electric power measurement system according to claim 6 ,
wherein said electric power information processing unit calculates and stores a median of said plurality of values of β/α in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β/α obtained in each of said measurement electric power ranges.

8. The home appliance electric power measurement system according to claim 6 ,
wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

9. The home appliance electric power measurement system according to claim 1 ,
wherein said electric power information processing unit calculates and stores a median of said plurality of values of β/α in each of predetermined measurement electric power ranges of said temperature measurement device and then calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detector using the median of said plurality of values of β/α obtained in each of said measurement electric power ranges.

10. The home appliance electric power measurement system according to claim 1 ,
wherein said electric power meter measures said total amount of electric power consumed indoors with an accuracy that can be converted into economic values.

11. The home appliance electric power measurement system according to claim 1 ,
wherein said electric power information processing unit calibrates the amount of electric power that is consumed by said electric device and that is measured by said electric power detection means using a median of value of β/α or a median of a predetermined number of values of β/α.

12. A home appliance electric power measurement method, comprising:
providing an electric device, that is a target whose electric power consumption is to be measured, with an electric power measurement unit that has an electric power detector that constantly measures the amount of electric power consumed by the electric device, a temperature measurement device that measures an ambient temperature of the electric device, and a first information communication transmitter that transmits a measurement va

Assignees

• Kudo Koji
• Morioka Yukiko
• Hongo Hiroo
• Sakuma Hisato
• Nec Corp

Inventors

• Kudo Koji
• Morioka Yukiko
• Hongo Hiroo
• Sakuma Hisato

Classifications

• H02J13/1335

  involving a local wireless network, e.g. Wi-Fi®, ZigBee® or Bluetooth® · CPC title

• H02J13/12

  Monitoring network conditions, e.g. electrical magnitudes or operational status · CPC title

• G01D4/002

  Remote reading of utility meters · CPC title

• G01D4/004 Primary

  Remote reading of utility meters to a fixed location · CPC title

• H02J13/0006

  Electricity · mapped topic