Embodiments described herein may relate to power-line communication (PLC) systems that are suitable for high-voltage and electrically noisy applications. In one example system, PLC technology is used to carry data on at least one pair of conductors of a high-voltage (e.g., kilovolt) transmission line that is simultaneously used for power transmission. Further, in some instances, the transmission line may be part of a tether that connects an aerial vehicle to a ground station.

A system for assigning addresses to a plurality of communication nodes coupled via a power line is disclosed. Each of the plurality of communication nodes includes a current sensor. The plurality of communication nodes includes one master communication node and the master communication node is configured to start an auto-addressing process by asking the each of the plurality of communication nodes to sink a preselect amount of current and measure current, through the current sensor, flowing through the powerline under the each of the plurality of communication nodes. A first communication node in the plurality of communication nodes that does not measure any current flowing under the first communication node is assigned a first address.

A processing method and LED module based on a power line transmission amplitude-modulated signal, which comprises a voltage processing module, a voltage regulator module, a control module, a constant current module, a signal comparison module, an oscillator and an LED, wherein an amplitude-modulated signal having a high and low level is input from a positive electrode terminal and then processed by the voltage processing module for input to the voltage regulator module, a power supply voltage is provided respectively for the LED and the control module under the effect of the voltage regulator module, and a reference voltage is provided for the signal comparison module; the amplitude-modulated signal is input to the signal comparison module, such that a control signal is obtained under the effect of the signal comparison module for input to the control module. In the invention, the LED emits light stably, and can be automatically produced.

An information handling system may include an air mover configured to drive a flow of air and a processing component communicatively coupled to the air mover for controlling operation of the air mover via a first wire configured to communicate analog air mover speed commands from the processing component to the air mover for controlling a speed of the air mover and a second wire configured to communicate analog tachometer information from the air mover to the processing component. At least one of the air mover and the processing component may be configured to initiate a mode for serial digital communication via the first wire and the second wire. The air mover and the processing component may be configured to communicate information to each other in accordance with a digital communication protocol via the first wire and the second wire during the mode for serial digital communication.

A power line communication device including a current path provided between a first terminal and a second terminal. A coupling circuit includes a first circuit of a first inductor connected in parallel with a first capacitor and a first resistor, wherein the coupling circuit is connected between the first and second terminals. A sensor is configured to sense a communication parameter of the coupling circuit. The communication parameter may be a resonance of the first circuit, the quality (Q) factor of the resonance, the bandwidth (BW) of the coupling circuit, the resistance of the first resistor, or the impedance of the first circuit. A transceiver is adapted to couple to the first and second terminal to transmit a signal onto the current path or receive a signal from the current path responsive to the parameter of the coupling circuit and a level of current in the current path sensed by the sensor.

A power line communication device including a current path provided between a first terminal and a second terminal. A coupling circuit includes a first circuit of a first inductor connected in parallel with a first capacitor and a first resistor, wherein the coupling circuit is connected between the first and second terminals. A sensor is configured to sense a communication parameter of the coupling circuit. The communication parameter may be a resonance of the first circuit, the quality (Q) factor of the resonance, the bandwidth (BW) of the coupling circuit, the resistance of the first resistor, or the impedance of the first circuit. A transceiver is adapted to couple to the first and second terminal to transmit a signal onto the current path or receive a signal from the current path responsive to the parameter of the coupling circuit and a level of current in the current path sensed by the sensor.

An information handling system may include an air mover configured to drive a flow of air and a processing component communicatively coupled to the air mover for controlling operation of the air mover via a first wire configured to communicate analog air mover speed commands from the processing component to the air mover for controlling a speed of the air mover and a second wire configured to communicate analog tachometer information from the air mover to the processing component. At least one of the air mover and the processing component may be configured to initiate a mode for serial digital communication via the first wire and the second wire. The air mover and the processing component may be configured to communicate information to each other in accordance with a digital communication protocol via the first wire and the second wire during the mode for serial digital communication.

A power line communication device including a current path provided between a first terminal and a second terminal. A coupling circuit includes a first circuit of a first inductor connected in parallel with a first capacitor and a first resistor, wherein the coupling circuit is connected between the first and second terminals. A sensor is configured to sense a communication parameter of the coupling circuit. The communication parameter may be a resonance of the first circuit, the quality (Q) factor of the resonance, the bandwidth (BW) of the coupling circuit, the resistance of the first resistor, or the impedance of the first circuit. A transceiver is adapted to couple to the first and second terminal to transmit a signal onto the current path or receive a signal from the current path responsive to the parameter of the coupling circuit and a level of current in the current path sensed by the sensor.

The present disclosure relates to a surface wave communication system comprising a surface wave conduit and being adapted for transmitting electromagnetic surface wave signals via the surface wave conduit. The surface wave communication system further comprises at least one interference cancelling system, where each interference cancelling system comprises an antenna arrangement and a cancelling device. The cancelling device is adapted to: input antenna signal components from the corresponding antenna arrangement in at least one corresponding antenna branch, input conduit signal components from the surface wave conduit in a conduit branch, to remove adapted antenna signal components from the conduit signal components such that recovered conduit signal components are obtained, and to output the recovered conduit signal components.

A harmonic detection system (1) comprises a measurement component (71), a harmonic abnormality determination unit (561), and a smartphone (9). The measurement component (71) is installed at a specific position on a distribution line constituting a distribution network (100), and measures data related to the current of the distribution line. The harmonic abnormality determination unit (561) uses some or all of the data related to current as detection data to detect abnormality related to harmonics. The smartphone (9) is owned by a user (G), and notifies the user that an abnormality has occurred in the distribution line when a harmonic is detected.