ELECTRICITY METERING DEVICE
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Abstract
A method for metering consumption of electrical energy includes charging a first store, thereby causing the first store to store electrical energy, transferring energy stored in the first store to a second store when a voltage across terminals of the first store reaches a pre-determined threshold, and using a transmitter, transmitting a message when both data representing a duration has reached a threshold value and when a voltage at terminals of the second store has exceeded a pre-determined threshold.
7 Citations
32 Claims
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1-16. -16. (canceled)
- 17. An apparatus comprising a meter for measuring consumption of electrical energy and carrying out wireless transmission of data representative of current that flows through a conductor, said apparatus comprising a current sensor, a first store, a threshold detector, a processor, a first switch, a second switch, a first wireless-transmitter, a first energy store, a second energy store, and a voltage meter, wherein said current sensor uses a primary current flowing through said conductor to induce a secondary current, wherein said first store connects to said current sensor and stores energy from said secondary current, wherein said threshold detector connects to said first store to determine when a voltage across terminals of said first store exceeds a threshold voltage, wherein said threshold detector controls said first switch and causes said first switch to permit power to be provided to said processor from said first store when said voltage across said terminals of said first store has exceeded said threshold voltage, wherein said second store connects to said first store, wherein said processor causes said second switch to trigger energy transfer from said first store to said second store thereby causing power to be supplied to said first wireless-transmitter when said voltage meter determines that a voltage across terminals of said second store exceeds a threshold and causes said first wireless-transmitter to transmit a message containing data representing said primary current to be transmitted.
- 29. A method for metering consumption of electrical energy, said method comprising using an induced current, charging a first store, thereby causing said first store to store electrical energy, transferring energy stored in said first store to a second store when a voltage across terminals of said first store reaches a pre-determined threshold, and using a transmitter, transmitting a message when both data representing a duration has reached a threshold value and when a voltage at terminals of said second store has exceeded a pre-determined threshold.
Specification