Power Measurement Ltd.

Daniel Alan Cumming

Martin A Hancock

Arthur B Wynans

Eric K Haight

Simon H Lightbody

Colin N Gunn

J Bradford Forth

Michael Edward Teachman

Stewart John Harding

Douglas Stephen Ransom

Marc Alan Ricci

Daniel Neil Loewen

A method, system and device for synchronizing a time period over which energy measurements are accumulated for an energy monitoring system including a plurality of energy monitoring devices is described. The method comprises transmitting a first radio frequency packet from a time reference device via at least a first and a second of the plurality of energy monitoring devices to a third of the plurality of energy monitoring devices. The method further comprises adjusting a time register within the third energy monitoring device based on the reception of the packet. The method further comprises accumulating a measure of energy consumption by the third energy monitoring device of a load coupled with the third energy monitoring device. The method further comprises transmitting the measure of energy consumption from the third energy monitoring device via at least a fourth and a fifth of the plurality of energy monitoring devices to a data aggregation device. The method further comprises identifying by the data aggregation device an aggregate measure of energy consumption consumed by the load over the time period.

Time coordinated energy monitoring system utilizing communications links

An energy measurement system including a radio frequency ('RF') device powered by a solar panel. The RF device comprising a wireless communication port operative to transmit and receive communication over a wireless network of additional RF devices. The energy measurement system able to transmit energy parameters of the RF device over the wireless network.

Radio frequency device within an energy sensor system

An energy monitoring device including procedures for secure communication of data from the device is disclosed. The energy monitoring device includes a public/private key pair used to encrypt and/or digitally sign communications by the device. This allows the receivers of these communications to authenticate the communications to ensure that the device and/or communications have not been compromised. The energy monitoring device is further capable of communications via an ad-hoc 'mesh' network, thereby facilitating communications among devices which are substantially inaccessible due to either physical or economic limitations.

Methods and apparatus for retrieving energy readings from an energy monitoring device

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Sidney, Canada

Daniel Alan Cumming