88results about "Transmission/receiving by modifying power source wave" patented technology

The present invention has been developed considering the above-described problems and aims to provide various structures and applications for illuminative light communication. According to the first aspect of the prevent invention, a broadcast system includes an LED light source 115 for lighting, a power line 103 that supplies electric power to the LED light source 115, a data modulator 102 that modulates and multiplexes a plurality of pieces of data, superimposes the resulting signal on an electric power waveform, and then transmits the resulting superimposed signal waveform to the power line 103, and a filter 112 that selectively separates one or more of a plurality of pieces of modulated data on the power line so as to control light intensity or blinking of the LED light source. Data is transmitted through changes in light intensity or blinking of the LED light source.

A method of communicating over a power line is disclosed, the method comprising the step of modulating a current component of an AC power signal present on the power line. Also disclosed is a communications protocol for communication between a monitoring unit and an appliance, the protocol having two modes of operation, the first mode being an on-line single direction protocol for communications from the appliance to the monitoring unit via modulation of a current component of an AC power signal between the monitoring unit and the appliance, and the second mode being an off-line protocol for communications at least from the monitoring unit to the appliance, the second mode being operable only when the power signal is not present between the monitoring unit and the appliance.

We disclose an apparatus capable of receiving control command data for one or more electrical fixtures and modulating an alternating current by modifying firing phase angles to transmit the data corresponding to the control commands via a power line transmitting the alternating current.

A mechanism for ensuring the physical location of data processing devices as a security check is provided. With this mechanism, security data is transmitted to data processing devices via an electrical network and is used to perform a security check to determine if the data processing device may operate. The data processing devices may be limited such that they may only power-up, boot-up, or remain operational when they are coupled to the electrical network. Thus, they must be physically located such that they may gain access to the electrical network. In addition, a security check may be used to control which data processing devices may communicate data packets with one another over the data network. When a data packet is received by a data processing device, security data in the data packet is compared against a local history of security data received by the recipient of the data packet via the electrical network. If matching security data is found in the history for the same time represented by an associated timestamp, then the sending data processing device and the receiving data processing device are determined to be present on the same electrical network and may communicate with one another.

In the case of performing communication by using illumination light when the illumination is on, switches are turned on, a signal modulated in an optical modulation part in accordance with information is superposed to a power waveform for the illumination with a power distributor and the illumination 16 is driven in a modulated state. When the illumination is off, the switches are turned off, a switch is turned on and a communication part is driven in a modulated state by the optical modulation part. The communication part can be constituted so as to include an infrared light emitting element part to perform infrared communication when the illumination is off. Consequently communication can be performed not only when the of illumination is on but also when the lighting is kept off. The communication device can be constituted of one element integrating the illumination part and the communication part, so that a compact system can be constituted.

A system for independent control of electric motors and electric lights includes a plurality of two-wire wallstations coupled in series via power wires between an alternating-current (AC) source and a light / motor control unit. The light / motor control unit is preferably located in the same enclosure as an electric motor and an electric light and has two outputs for independent control of the motor and the light. The light / motor control unit and the wallstations each include a controller and a communication circuit that is coupled to the power wiring via a communication transformer and communicate with each other using a loop current carrier technique. The light / motor control unit and the wallstations utilize pseudo random orthogonal codes and a median filter in the communication process.

One embodiment of the present invention provides a system that uses power-line phase-cut signaling to change energy usage for one or more devices that share a common power signal. During operation, the system receives a request to change power usage. In response to the request, the system inserts a phase-cut notch into the common power signal. A device that is located downstream from the inserted phase-cut notch detects this notch in the common power signal, and in response triggers a power-state change. For instance, the device may trigger a reduced-power state when it detects a phase-cut notch.

One embodiment of the present invention provides a system that uses power-line phase-cut signaling to change energy usage for one or more devices that share a common power signal. During operation, the system receives a request to change power usage. In response to the request, the system inserts a phase-cut notch into the common power signal. A device that is located downstream from the inserted phase-cut notch detects this notch in the common power signal, and in response triggers a power-state change. For instance, the device may trigger a reduced-power state when it detects a phase-cut notch.

A detectable warning system, for tactily signaling the presence of a terrain transition to a pedestrian, using a plurality of detectable warning domes that are arranged in a grid within a detectable warning carrier assembly. The detectable warning carrier assembly comprises a top layer and base layer of thermoplastic material with heat resistant detectable warning domes therebetween. The base layer is heated and adhered to a pavement surface. The detectable warning domes protrude from the pavement surface in an evenly spaced pattern that is detectable by the pedestrian using a cane or other guidance instrument.

Plural ECUs are connected to each other by an electric power line that is for supplying electric power. Each ECU sends information with a carrier wave having a first frequency lower than a dip frequency estimated by the physical condition and the circuit structure of electric power line, or having a second frequency lower than the first frequency. Or, the physical condition and the circuit structure of electric power line are determined, on the contrary, to make the dip frequency become higher than the frequency of utilized carrier wave. The frequency utilized for sending information may be selected in accordance with the contents of information.

A power line communication apparatus, device control apparatus, and device control method are disclosed. By controlling the phase of AC power with reference to a zero cross point during power line communication, the power line communication apparatus enables not only data to be transmitted and received in a manner robust against noise and impedance but also the receiving end to be miniaturized. The power and operation of household devices can be controlled through the power line communication apparatus, thereby eliminating the need for separate communication networks when a remote control system is built in the home.

A method in a computerized system including a microprocessor adapted to run a previously installed firmware code. The computerized system is adapted to receive power from an alternating current (AC) power supply. The AC power supply may include either an AC generator or an AC output of direct current (DC) to AC inverter. The frequency is monitored for a frequency variation pattern of the AC power supply. Optionally, the frequency is monitored upon receiving a request to update the firmware code. Upon recognizing the frequency variation pattern, a firmware update of the firmware code is enabled.

An improved battery, monitoring circuit and method for communicating with the battery is provided. Such batteries and communication methods are particularly useful in UPS systems that use such batteries to provide back-up power to electrical loads. In one aspect, performance, manufacturing, trend and / or other data are stored in non-volatile memory of the battery and are communicated to an external system such as a UPS. In another aspect, a method for communicating via single-wire interface is provided. In one aspect, a same interface is used to communicate with both conventional batteries and improved batteries having increased monitoring capabilities.

A detectable warning system, for tactily signaling the presence of a terrain transition to a pedestrian, using a plurality of detectable warning domes that are arranged in a grid within a detectable warning carrier assembly. The detectable warning carrier assembly comprises a carrier layer being one of a top layer and a base layer of thermoplastic material with heat resistant detectable warning domes therebetween. The carrier layer is heated and adhered to a pavement surface. The detectable warning domes protrude from the pavement surface in an evenly spaced pattern that is detectable by the pedestrian using a cane or other guidance instrument.

A transmitting and receiving system for digital communication on electric power-lines comprises a transmitting device and a receiving device. The transmitting device consists of an input terminal, a bipolar-pulse generator, a first piezoelectric substrate, first- and second coded IDTs, a first intermediary IDT, an electrode group, a synchronizing device, an envelope detecting device, a monopolar-pulse generator, and a mixer connected with electric power-lines. The receiving device consists of a receiving connector connected with the electric power-lines, a tuning coil, a second piezoelectric substrate, a second intermediary IDT, third- and fourth coded IDTs, a detecting device, and a detecting terminal. If a message digital-signal is applied to the bipolar-pulse generator via the input terminal, high-frequency bipolar-pulses (-1 and 1) are generated, and after all, are transduced to first- and second coded digital-signals at the monopolar-pulse generator. The first- and second coded digital-signals are delivered into the electric power-lines via the mixer. On the other hand, if the first coded digital-signal is received at the receiving connector, the first coded digital-signal is applied to the second intermediary IDT via the tuning coil. The first coded digital-signal is, after all, transduced to a first decoded pulse at the third coded IDT. In the same way, the second coded digital-signal is transduced to a second decoded pulse at the fourth coded IDT. As a result, an output digital-signal, which is composed of the first- and second decoded pulses and is equivalent to the message digital-signal, is detected at the detecting terminal via the detecting device.

A geometric harmonic modulation (GHM) communication system communicates GHM signals on a power line of a reconfigurable network. The GHM communication system includes a master controller connected to the power line for transmitting GHM signals on the power line. A boundary component is also connected to the power line. A GHM addressable device is connected to the power line between the master controller and the boundary component. The GHM addressable device defines a boundary of a network region based on the GHM signals transmitted over the power line.

Plural electronic control units (ECUs) are connected to each other by an electric power line that is for supplying electric power. Each ECU sends information with a carrier wave having a first frequency lower than a dip frequency estimated by the physical condition and the circuit structure of electric power line, or having a second frequency lower than the first frequency. Or, the physical condition and the circuit structure of electric power line are determined, on the contrary, to make the dip frequency become higher than the frequency of utilized carrier wave. The frequency utilized for sending information may be selected in accordance with the contents of information.

A system for transmitting electrical power and communication signals is provided. The system comprises a transmission line, a source of electrical power for supplying electrical power to the transmission line, a first communication unit configured to supply communication signals to the transmission line, a power extraction unit configured to extract and use electrical power from the transmission line, a second communication unit configured to receive communication signals from the transmission line; and a control unit configured to control operation of the system. The source supplies electrical power to the transmission line for respective periods of time which are different from respective periods of time in which the first communication unit supplies communication signals to the transmission line.

A power line communication apparatus, device control apparatus, and device control method are disclosed. By controlling the phase of AC power with reference to a zero cross point during power line communication, the power line communication apparatus enables not only data to be transmitted and received in a manner robust against noise and impedance but also the receiving end to be miniaturized. The power and operation of household devices can be controlled through the power line communication apparatus, thereby eliminating the need for separate communication networks when a remote control system is built in the home.

A method for performing communication by utilizing the AC current in a power line without requiring any modulation or superposition of a high frequency. In the communication method utilizing the AC current in a secondary power line (L), an electric load (e.g. a load current) is imparted to the secondary power line (L), the load current is added to one AC current wavelength of the secondary power line (L), and an AC current including the processed waveform is transmitted as an information signal.

A mechanism for ensuring the physical location of data processing devices as a security check is provided. With this mechanism, security data is transmitted to data processing devices via an electrical network and is used to perform a security check to determine if the data processing device may operate. The data processing devices may be limited such that they may only power-up, boot-up, or remain operational when they are coupled to the electrical network. Thus, they must be physically located such that they may gain access to the electrical network. In addition, a security check may be used to control which data processing devices may communicate data packets with one another over the data network. When a data packet is received by a data processing device, security data in the data packet is compared against a local history of security data received by the recipient of the data packet via the electrical network. If matching security data is found in the history for the same time represented by an associated timestamp, then the sending data processing device and the receiving data processing device are determined to be present on the same electrical network and may communicate with one another.

A method for emitting a predetermined series of pulses on an electricity distribution network carrying a determined voltage includes linking an electric element to the network by a switch and supplying a control signal to the switch. The switch is driven by the control signal, such that high frequency spurious pulses are emitted at the rate of the control signal. According to one embodiment, the control signal is data bearing, such that data-bearing high frequency spurious pulses are emitted at the rate of the control signal.

Thus, according to the invention, for monitoring and / or controlling or automatically controlling the voltage of at least one group of cells in a cell compound of an energy storage device, particularly an energy storage device in an onboard power supply system of a motor vehicle, a data communication is carried out between a central logic and a cell group logic by way of the rail line connecting the latter, in which case voltage levels exist between an idle level situated at or above a maximal voltage level, up to which the cell group logic exchanges energy with the rail line for charging or discharging the cell group, and a data level situated above the idle level.

The present invention is concerned with a system for transmitting and / or receiving the control and sensing signals between the control units and the power electronic components. The system according to the present invention comprises: a transceiver adapted to modulate the communication signal on a communication signal frequency band, and a coupler connected to the power conductor and adapted to couple the modulated communication signal to the power conductor. The present invention also concerns a method for transmitting and receiving the control and sensing signals.

Method for communication between an electronic module and a sensor having a light source and being supplied by supply line, the electronic module measuring the modulations of the intensity of the current in the line. The sensor drives a gradual turning on / turning off of the light source by a first modulation of the intensity of the current such that: the light source is turned off, respectively turned on, when the intensity of the current is in a low, respectively high, state, and the light source illuminates, respectively turns off, when the duty ratio of the intensity of the current varies from the high state to the low state and vice versa. During detection, the sensor dispatches a second modulation through the light source, however if the light source is turning on (or off), this is interrupted and the intensity of current is forced to the high (or low) state.

A power line communication device includes a DC power source device, a power line, and a master station that modulates a supply voltage VBUS supplied to the power line according to transmission data to be transmitted. The master station includes a modulation capacitor that is precharged with a modulation amplitude voltage, a polarity switch unit that determines a polarity of the modulation capacitor connected to the power line according to transmission data, and an inductor connected between the DC power source device and the power line.

Disclosed herein is a data communication method and apparatus for transmitting and receiving data in the form of a square-wave signal having a specific amplitude using an AC power line between a transmitter and a receiver connected in a closed circuit by cutting an AC voltage waveform and loading the data on the AC voltage waveform. The transmitter comprises a transmitter power supply unit 10, a data window detector 20 for clamping a voltage signal from the power line N to detect a section of the voltage signal on which data will be loaded, a microcomputer 30 for transmitting the data in a data-loading period and controlling data transmission in response to a reception feedback signal from a receiver, a data modulator 40 for loading the data transmitted from the microcomputer 30 on the voltage signal from the power line N in the form of a pulse signal, a pulse level controller 50 for adjusting a drive voltage of the data modulator 40 to control a data transmission pulse level to be stabilized, and a reception detector 60 for feeding back information on whether the receiver receives the signal transmitted from the transmitter to the microcomputer 30. The receiver comprises a data window detector 80, a data pulse detector 90 and a microcomputer 100. Logic circuits can replace the microcomputer 100.

An apparatus is disclosed where a Powerline interface is used to transmitting data into the powerline grid network, where the powerline interface is pulling the required transmit energy from the power grid network, where the powerline interface is transmitting data using standard modulation such as ASK, FSK, S-FSK, QPSK, OFDM, etc. . . where the transmit data are passed on to the powerline interface by the use of an adapation stage, where a “control signal” is used to enable the transmitting of data by providing enough voltage to polarize the FET used in the control path.