PHASE-BASED OPERATION OF DEVICES ON A POLYPHASE ELECTRIC DISTRIBUTION SYSTEM
First Claim
1. A method, comprising:
- monitoring an alternating-current (AC) waveform of an electrical power source at a device in a computer network, the power source being part of a polyphase power source system;
determining a particular phase of the polyphase power source system at the device based on the AC waveform; and
in response to determining to particular phase of the device, joining, by the device, a directed acyclic graph (DAG) specific to the particular phase until the device detects that the particular phase of the devices has changed.
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Abstract
In one embodiment, a device in a computer network monitors an alternating-current (AC) waveform of an electrical power source at the device, where the power source is part of a polyphase power source system. Once the device determines a particular phase of the polyphase power source system at the device, then the device joins a directed acyclic graph (DAG) specific to the particular phase. In another embodiment, a device detects a time of a zero crossing of the AC waveform, and may then determine a particular phase of the polyphase power source system at the device based on the time of the zero crossing relative to a corresponding location within a frequency hopping superframe of the computer network.
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Citations
15 Claims
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1. A method, comprising:
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monitoring an alternating-current (AC) waveform of an electrical power source at a device in a computer network, the power source being part of a polyphase power source system; determining a particular phase of the polyphase power source system at the device based on the AC waveform; and in response to determining to particular phase of the device, joining, by the device, a directed acyclic graph (DAG) specific to the particular phase until the device detects that the particular phase of the devices has changed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a power supply adapted to receive an alternating-current (AC) waveform of an electrical power source, the power source being part of a polyphase power source system; a network interface adapted to communicate in a computer network; a processor coupled to the network interface and adapted to execute one or more processes; and a memory configured to store a process executable by the processor, the process when executed operable to; monitor the AC waveform; determine a particular phase of the polyphase power source system at the power supply based on the AC waveform; and in response to a determination of the particular phase of the device, join a directed acyclic graph (DAG) specific to the particular phase via the network interface until the device detects that the particular phase of the devices has changed. - View Dependent Claims (9, 10, 11)
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12. A tangible, non-transitory, computer-readable media having software encoded thereon, the software when executed by a processor on a device in a computer network operable to:
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monitor an alternating-current (AC) waveform of an electrical power source at the device, the power source being part of a polyphase power source system; determine a particular phase of the polyphase power source system at the device based on the AC waveform; and in response to a determination of the particular phase of the device, join the device to a directed acyclic graph (DAG) specific to the particular phase until the device detects that the particular phase of the devices has changed. - View Dependent Claims (13, 14, 15)
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Specification