A wireless power supply device includes: a power supply coil for wirelessly transmitting electric power to a power receiving device; a driving circuit for outputting pulse electric power to the power supply coil; a first radio module for receiving rectified voltage information regarding rectified voltage generated in the power receiving device via a radio communication path; and a control circuit for generating a driving control signal on the basis of the rectified voltage information received by the first radio module, thereby to control the driving circuit, said control circuit controlling a driving frequency of the driving circuit at a fixed frequency between a series resonant frequency and a parallel resonant frequency of a resonant circuit of the power receiving device.

A method of providing power to an implant includes: transcutaneously receiving first power wirelessly from a source transmitter by a receiver of a power relay device, the receiver of the power relay device being disposed inside a biological body and closer to a skin of the biological body than the implant is to the skin of the biological body; converting the first power into second power that has a substantially different frequency than the first power, or is of different type of power than the first power, or both; and internally coupling the second power from a transmitter of the power relay device to the implant disposed within the biological body.

A method of providing power to an implant includes: transcutaneously receiving first power wirelessly from a source transmitter by a receiver of a power relay device, the receiver of the power relay device being disposed inside a biological body and closer to a skin of the biological body than the implant is to the skin of the biological body; converting the first power into second power that has a substantially different frequency than the first power, or is of different type of power than the first power, or both; and internally coupling the second power from a transmitter of the power relay device to the implant disposed within the biological body.

An ultrasound power transmitter comprising a transmit ultrasonic transducer array has a plurality of transmit ultrasonic transducers. The ultrasound power transmitter activates a set of transmit ultrasonic transducers in close proximity of an electronic device to be arranged to beam ultrasound energy to the electronic device. Alignment magnets of the ultrasound power transmitter are aligned with corresponding alignment magnets of the electronic device to manage the ultrasound beaming. The ultrasound energy may be converted into electric power to charge the battery of the electronic device. Feedbacks may be provided by the electronic device to the ultrasound power transmitter to increase power transmission efficiency. The ultrasound power transmitter may pair the electronic device with other different electronic devices utilizing ultrasonic signals. A spacer with good ultrasound power transmission properties may be located between the ultrasound power transmitter and an ultrasound power receiver of an intended electronic device to enhance power transmission.

A footwear sole cleaning and sanitizing system including a housing having a top surface, first side positioned adjacent to a user entry portal, a second side positioned adjacent to a user exit portal, and railing mounted on the top surface. The system includes a debris remover arranged to remove debris from the footwear sole and a sanitizer arranged to remove contaminants from the footwear sole. The system further includes sensors arranged to generate sensor data based on a detected position of the footwear sole, a user interface arranged to provide cues to the user during operations of the device, and a controller arranged to: i) receive the sensor data from the sensors; i) control operations of the debris remover and sanitizer in response to the received sensor data, and iii) send cue instructions associated with the one or more cues to the user interface.

A footwear sole cleaning and sanitizing system including a housing having a top surface, first side positioned adjacent to a user entry portal, a second side positioned adjacent to a user exit portal, and railing mounted on the top surface. The system includes a debris remover arranged to remove debris from the footwear sole and a sanitizer arranged to remove contaminants from the footwear sole. The system further includes sensors arranged to generate sensor data based on a detected position of the footwear sole, a user interface arranged to provide cues to the user during operations of the device, and a controller arranged to: i) receive the sensor data from the sensors; i) control operations of the debris remover and sanitizer in response to the received sensor data, and iii) send cue instructions associated with the one or more cues to the user interface.

Ultrasonic transmitting elements in an electroacoustical transceiver transmit acoustic energy to an electroacoustical transponder, which includes ultrasonic receiving elements to convert the acoustic energy into electrical power for the purposes of powering one or more sensors that are electrically coupled to the electroacoustical transponder. The electroacoustical transponder transmits data collected by the sensor(s) back to the electroacoustical transceiver wirelessly, such as through impedance modulation or electromagnetic waves. A feedback control loop can be used to adjust system parameters so that the electroacoustical transponder operates at an impedance minimum. An implementation of the system can be used to collect data in a vehicle, such as the tire air pressure. Another implementation of the system can be used to collect data in remote locations, such as in pipes, enclosures, in wells, or in bodies of water.

Ultrasonic transmitting elements in an electroacoustical transceiver transmit acoustic energy to an electroacoustical transponder, which includes ultrasonic receiving elements to convert the acoustic energy into electrical power for the purposes of powering one or more sensors that are electrically coupled to the electroacoustical transponder. The electroacoustical transponder transmits data collected by the sensor(s) back to the electroacoustical transceiver wirelessly, such as through impedance modulation or electromagnetic waves. A feedback control loop can be used to adjust system parameters so that the electroacoustical transponder operates at an impedance minimum. An implementation of the system can be used to collect data in a vehicle, such as the tire air pressure. Another implementation of the system can be used to collect data in remote locations, such as in pipes, enclosures, in wells, or in bodies of water.

Systems and techniques are provided for beamforming for wireless power transfer. A phase/amplitude map for a notional field in a plane of an aperture of the second wireless power transfer device may be determined. A Fourier transform may be performed on the phase/amplitude map for the notional field to generate a spatial frequency representation of the notional field. A phase/amplitude map for a second notional field in a plane of an aperture of the first wireless power transfer device may be determined based on the spatial frequency representation of the notional field and the position of the second wireless power transfer device. Control signals for transducer elements of the first wireless power transfer device may be generated based on the determined phase/amplitude map for the second notional field. The control signals for the transducer elements may be supplied to the transducer elements.

Ultrasonic transmitting elements in an electroacoustical transceiver transmit acoustic energy to an electroacoustical transponder, which includes ultrasonic receiving elements to convert the acoustic energy into electrical power for the purposes of powering one or more sensors that are electrically coupled to the electroacoustical transponder. The electroacoustical transponder transmits data collected by the sensor(s) back to the electroacoustical transceiver wirelessly, such as through impedance modulation or electromagnetic waves. A feedback control loop can be used to adjust system parameters so that the electroacoustical transponder operates at an impedance minimum. An implementation of the system can be used to collect data in a vehicle, such as the tire air pressure. Another implementation of the system can be used to collect data in remote locations, such as in pipes, enclosures, in wells, or in bodies of water.