Abstract:
Systems and methods for sensing environmental changes using electromagnetic interference (EMI) signals are disclosed herein. An EMI monitoring system may be used to monitor an EMI signal of one or more EMI signal sources provided over a power line, e.g., in a home or building. The received EMI energy at the power line may be analyzed to detect variations in the EMI signature indicative of environmental changes occurring in the proximity of the signal sources. Examples include detection of gestures on or near liquid crystal displays using EMI signals generated by internal operation of the liquid crystal displays.
Abstract:
Examples of automatic valve shutoff systems are described which may include an actuation device including an actuator and a valve attachment portion. The valve attachment portion may be configured for attachment with an existing valve in a fluid or compressible gas supply line. The system may further include a controller coupled to the actuation device, wherein the controller is configured to initiate a valve shutoff process in response to a wireless signal. Wake-up circuitry may be coupled to the controller and configured to monitor the supply line for vibrations and activate the controller in response to the vibrations.
Abstract:
Examples of automatic valve shutoff systems are described which may include an actuation device including an actuator and a valve attachment portion. The valve attachment portion may be configured for attachment with an existing valve in a fluid or compressible gas supply line. The system may further include a controller coupled to the actuation device, wherein the controller is configured to initiate a valve shutoff process in response to a wireless signal. Wake-up circuitry may be coupled to the controller and configured to monitor the supply line for vibrations and activate the controller in response to the vibrations.
Abstract:
Examples of automatic valve shutoff systems are described which may include an actuation device including an actuator and a valve attachment portion. The valve attachment portion may be configured for attachment with an existing valve in a fluid or compressible gas supply line. The system may further include a controller coupled to the actuation device, wherein the controller is configured to initiate a valve shutoff process in response to a wireless signal. Wake-up circuitry may be coupled to the controller and configured to monitor the supply line for vibrations and activate the controller in response to the vibrations.
Abstract:
Apparatuses, sensor nodes, systems and methods for modulating and transmitting sensor data wirelessly to an existing power line network are described. An apparatus may include a microcontroller having an oscillator and an input/output buffer. The microcontroller may process an electrical signal and the input/output buffer may drive a digital signal. The apparatus may include a transmitter utilizing the oscillator and the input/output buffer of the microcontroller. The transmitter may include a resonator coupled to the oscillator and modulation circuitry coupled to the oscillator and resonator. The resonator may modulate a frequency of the oscillator responsive to a modulation signal based on the processed electrical signal. The transmitter may further include an antenna coupled to the input/output buffer of the microcontroller for transmission of the data, and a resonant tank coupled to an output of the input/output buffer to provide an analog signal to the antenna.
Abstract:
Apparatuses, receivers, systems and methods for receiving data via a power line infrastructure. An exemplary apparatus includes a base station configured to receive a signal from a power line of a structure by coupling to the power line through an electrical outlet. The base station may include an impedance matching circuit configured to match an impedance of the power line of the structure, and a receiver coupled to the impedance matching circuit. The receiver may be configured to demodulate the signal received from the power line of the structure, convert the demodulated signal into a digital signal, and provide the digital signal to a decoder.
Abstract:
Apparatuses, sensor nodes, systems and methods for modulating and transmitting sensor data wirelessly to an existing power line network are described. An apparatus may include a microcontroller having an oscillator and an input/output buffer. The microcontroller may process an electrical signal and the input/output buffer may drive a digital signal. The apparatus may include a transmitter utilizing the oscillator and the input/output buffer of the microcontroller. The transmitter may include a resonator coupled to the oscillator and modulation circuitry coupled to the oscillator and resonator. The resonator may modulate a frequency of the oscillator responsive to a modulation signal based on the processed electrical signal. The transmitter may further include an antenna coupled to the input/output buffer of the microcontroller for transmission of the data, and a resonant tank coupled to an output of the input/output buffer to provide an analog signal to the antenna.
Abstract:
Apparatuses, receivers, systems and methods for receiving data via a power line infrastructure. An exemplary apparatus includes a base station configured to receive a signal from a power line of a structure by coupling to the power line through an electrical outlet. The base station may include an impedance matching circuit configured to match an impedance of the power line of the structure, and a receiver coupled to the impedance matching circuit. The receiver may be configured to demodulate the signal received from the power line of the structure, convert the demodulated signal into a digital signal, and provide the digital signal to a decoder.
Abstract:
Examples of automatic valve shutoff systems are described which may include an actuation device including an actuator and a valve attachment portion. The valve attachment portion may be configured for attachment with an existing valve the in a fluid or compressible gas supply line. The system may further include a controller coupled to the actuation device, wherein the controller is configured to initiate a valve shutoff process in response to a wireless signal. Wake-up circuitry may be coupled to the controller and configured to monitor the supply line for vibrations and activate the controller in response to the vibrations.
Abstract:
Apparatuses, receivers, systems and methods for receiving data via a power line infrastructure. An exemplary apparatus includes a base station configured to receive a signal from a power line of a structure by coupling to the power line through an electrical outlet. The base station may include an impedance matching circuit configured to match an impedance of the power line of the structure, and a receiver coupled to the impedance matching circuit. The receiver may be configured to demodulate the signal received from the power line of the structure, convert the demodulated signal into a digital signal, and provide the digital signal to a decoder.