Kilowatt-hour Counter Using An ADI ADE7755

• US 20040169500A1
• Filed: 03/01/2003
• Published: 09/02/2004
• Est. Priority Date: 03/01/2003
• Status: Abandoned Application

• Current Assignee: Mr. Johnnyson Plato Jones
• Original Assignee: Johnnyson Jones
• Inventors: Jones, Johnnyson P.
• Application Number:
  US10/248,918
• Publication Number:
  US 20040169500A1
• Time in Patent Office: Days
• US Class Current: 324/142
• CPC Class Codes: G01R 22/10 using digital techniques
• CPC Class Codes: G01R 35/04 of instruments for measuring time integral of power or current

Abstract

A kilowatt-hour counter (10) is provided that accepts the male plug of a standard US household appliance and that is plugged into a standard US household electrical socket. An extremely low ohm resistor is used to create a voltage proportional to the electrical energy used. This voltage is used by an Analog Devices Energy Monitoring Integrated Chip, along with a Microchip Corporation microprocessor, to produce and display a kilowatt-hour count. Two alternate embodiments are presented. In the first, the kilowatt-hour counter is mounted behind a standard 2-female outlet (20). In the second, the kilowatt-hour counter is mounted behind a standard 1-switch wall switch (30).

Claims

1. An electric kilowatt-hour counter comprising:

a body member;

An Analog Devices, Inc. ADE7755 Energy Measurement IC for measuring the voltage of the monitored device and producing a pulse train with frequency proportional to the kilowatt-hours consumed;

A Microchip Corporation PIC16C620A Microprocessor IC for monitoring and counting the pulse train and for converting the pulse train count into the corresponding kilowatt-hour count;

A display system consisting of a 4 digit LED display for outputting the kilowatt-hour count;

A low ohm resistor for producing a voltage proportional to the electrical energy used.

PIC16C620 Assembly language program controlling the PIC16C620 operations Prongs on the body member for insertion into an electric wall socket;

A female socket on the body member for receiving the plug of an electric appliance, said socket being in electrical communication with the prongs for transferring electric power from the prongs to said socket;