Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Holdings Corporation

Hiroyuki Tani

Shoichi Kajiwara

Yuki Tanaka

Ryosuke Hasaba

Takuma Ikeda

Yohei Tanaka

Atsushi Yamamoto

Yoichiro Ueda

Kazuhiko Ikeda

Kohichi Tanda

Hirofumi Kosaka

Wireless power transmitter

A radio power transmission system and a radio power transmission method are provided. The radio power transmission system includes a first radio device and a second radio device including a control signal generator and an antenna. The control signal generator generates a control signal for synchronizing frequencies and phases of power waves, based on signals indicating reception intensities of the power waves in a receiving device receiving the power waves. The antenna transmits the control signal to a plurality of the first radio devices. In the radio power transmission system, the plurality of first radio devices radiate, toward the receiving device, the power waves having the frequencies and phases set to a predetermined value based on the control signal.

Radio power transmission system and radio power transmission method

Provided is a living body information identification system that can identify position information of a living body (a person) and state information about a state of the living body without attaching a wireless device or a sensor on a human body. The living body information identification system includes a transceiver configured to transmit radio waves and wirelessly receive a signal, and sensor modules configured to receive the radio waves, convert the received radio waves into power, and use the power as a power supply to transmit own unique ID information to the transceiver. The sensor modules receive the radio waves from the transceiver, convert the received radio waves into power, and use the power as a power supply to transmit state information about a state of the living body to the transceiver. The transceiver identifies the living body based on the ID information and the state information.

Living body information identification system and method

The wireless power supply sensing system includes a transmitter/receiver and a power reception sensor. The transmitter/receiver has: an oscillation unit for generating electrical power; and a control unit for causing electrical power to be radiated into space and instructing an electrical power supply operation by the power reception sensor. In a first mode, in which the charge amount of a secondary cell is equal to or higher than a threshold value, the control unit controls the power reception sensor so that the electrical power received by the power reception sensor is supplied to a sensor unit, and in a second mode, in which the charge amount of the secondary cell is less than the threshold value, the control unit controls the power reception sensor so that the electrical power received by the power reception sensor is supplied to the secondary cell.

Wireless power supply sensing system

A wireless power feeding method includes causing each of a plurality of power transmitters to acquire power amounts for power received by one or more of a power receptors which are targets for power transmission, determining a first power amount which is the smallest out of acquired power amounts, and adjusting a power transmission direction to be a direction in which the power received by the power receptor which has received the first power amount is maximum. Each of the plurality of power transmitters are caused to transmit power in the adjusted power transmission direction and leaked power amounts for leaked power, which is received by the power receptors that are the targets for power transmission of other power transmitters, are acquired as leaked power amounts to the power transmitters for which the targets for power transmission are the power receptors which receive the leaked power.

Wireless power feeding method and wireless power feeding device

A rotational deviation and a positional deviation of a power transmission antenna and a power reception antenna are adjusted using an amount of electric power received in adjustment antenna elements provided on the same plane as the power transmission antenna and the power reception antenna.

Wireless power supply method

A direction of the first power transmission antenna is detected in a power transmission stop state from the slave power transmission apparatus after detection of a power reception apparatus, by using a master power transmission apparatus including a first power transmission device and a first power transmission antenna and a slave power transmission apparatus including a second power transmission device and a plurality of the second power transmission antennas, a second power transmission antenna in which an amount of electric power received by the power reception apparatus becomes maximum is detected in the power transmission stop state from the master power transmission apparatus, and a phase of at least one power transmission radio wave of the master power transmission apparatus and the slave power transmission apparatus is adjusted to a phase in which the amount of the electric power received by the power reception apparatus becomes maximum.

Wireless power feeding method

In a method and system for wireless power supply, the misalignment between the power transmission antenna and the power reception antenna is detected based on the electric power of an electromagnetic wave radiated from the position-detection power transmission antennas of the power transmission antenna, reflected by a reflector provided outside the power reception surface of the power reception antenna, and detected by the position-detection power reception antennas of the power transmission antenna.

Method and system for wireless power supply

A wireless power supply device is capable of supplying constant power without fluctuation in transmission efficiency even when small-sized antennas in which the power fluctuates due to the transmission distance are used. The wireless power supply device includes a first power receiving antenna having a power receiving surface facing a power transmission surface of a first transmission antenna and a second power receiving antenna having a power receiving surface facing a power transmission surface of a second power transmission antenna, both are integrally formed and connected to a power supply target. A direction in which the power receiving surface of the first power receiving antenna faces the power transmission surface of the first power transmission antenna is parallel to a direction in which the power receiving surface of the second power receiving antenna faces the power transmission surface of the second power transmission antenna.

Wireless power supply device

An apparatus for determining a type of an electromagnetic wave generating source, including: a measurement unit that measures electromagnetic field strength at first and second measurement points at vertically different respective distances from a main surface of an object to be measured; a calculation unit that calculates an attenuation amount of the electromagnetic field strength between the first and second measurement points using measured values of the electromagnetic field strength measured by the measurement unit; and a determination unit that determines whether the generating source is the electric current source or the magnetic current source by judging which one of a reference value of an electric current source and a reference value of a magnetic current source is close to a value of the attenuation amount calculated by the calculation unit.

Apparatus and method for determining the type of electromagnetic wave generating source

An electromagnetic wave measuring method is provided that is capable of performing high-precision measurement in a shorter time and in a greater variety of frequency bands than heretofore with a comparatively simple configuration. A plate-like antenna () of which the outline shape of an opposed surface opposite a measured object () is similar to the outline shape of an opposed surface of the measured object () is brought close to the measured object (), and an electromagnetic wave from the measured object () is measured based on the frequency spectrum of a received signal received by the plate-like antenna ().

Electromagnetic wave measuring method and electromagnetic wave measuring apparatus

In order to direct a probe having directivity that a received band is widened in accordance with a measurement distance, toward a DUT, shift the received band of the probe in sequence, receive electromagnetic, and measure electromagnetic interference, a plurality of long and short measurement distances between the probe and the DUT are set, and measurement at the long measurement distance and measurement at the short measurement distance are performed plural times. Herein, the measurement at the short measurement distance is performed on a received band where electromagnetic interference is measured by the measurement at the long measurement distance. Thus, measurement of electromagnetic interference can be performed with high accuracy in a short time.

Growing community of inventors

Hyogo, Japan

Hiroyuki Tani