Use of powerlines for transmission of high frequency signals
First Claim
Patent Images
1. A method for powerline communication across transformers, open or closed circuit breakers, and other devices, comprising:
- providing a signal at a signal output, the signal at a frequency higher than a frequency of the power line and selected to provide an acceptable loss over a communication path traveling through one or more transformers or open or closed circuit breakers;
coupling the powerline to the signal output at a first location using a coupler to communicate the signal over the powerline;
receiving the signal at a second location, the second location separated from the first location by the communication path;
wherein the one or more transformers or circuit breakers includes least two transformers; and
wherein the at least two transformers comprises two cascading transformers.
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Abstract
Communication is provided which includes receiving a transmitted radio signal at a powerline wherein the powerline functions as a receiving antenna for the wirelessly transmitted radio signal. The powerline is coupled to an input of a radio receiver using a coupler to communicate the radio signal to the radio receiver. For calibration purposes a second antenna not coupled to powerline may be used. A method for powerline communication across transformers, open circuit breakers, and other devices is also provided. In addition, a method of monitoring a device connected to a powerline is provided.
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Citations
15 Claims
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1. A method for powerline communication across transformers, open or closed circuit breakers, and other devices, comprising:
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providing a signal at a signal output, the signal at a frequency higher than a frequency of the power line and selected to provide an acceptable loss over a communication path traveling through one or more transformers or open or closed circuit breakers; coupling the powerline to the signal output at a first location using a coupler to communicate the signal over the powerline; receiving the signal at a second location, the second location separated from the first location by the communication path; wherein the one or more transformers or circuit breakers includes least two transformers; and wherein the at least two transformers comprises two cascading transformers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14)
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10. A method for powerline communication across transformers, open or closed circuit breakers, and other devices, comprising:
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providing a signal at a signal output, the signal at a frequency higher than a frequency of the power line and selected to reduce interference or loss over a communication path traveling through one or more transformers or open or dosed circuit breakers and the signal further having a modulation scheme selected to reduce interference or loss; coupling the powerline to the signal output at a first location using a coupler to communicate the signal over the powerline; receiving the signal at a second location, the second location separated from the first location by the communication path. - View Dependent Claims (11, 12, 13)
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15. A method for powerline communication across transformers, open or closed circuit breakers, and other devices, comprising:
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providing a signal at a signal output, the signal at a frequency higher than a frequency of the power line, the signal for communication over a communication path traveling through one or more transformers or open or closed circuit breakers and the signal further using it direct sequence spread spectrum (DSSS) modulation scheme; coupling the powerline to the signal output at a first location using a coupler to communicate the signal over the powerline; receiving the signal at a second location, the second location separated from the first location by the communication path; wherein the one or more transformers or open or closed circuit breakers comprises a distribution transformer; wherein the coupler is configured to perform surge protection; and wherein the coupler comprises a high pass filter.
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Specification