Abstract: 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.

Abstract: A detection device, a detection system and a detection method capable of detecting accurate position and orientation of a wearable device on a body are provided. A detection device includes a wireless communicator that receives orientation information indicating an orientation of a wearable device disposed on a body from the wearable device by wireless communication, measures an intensity of a radio wave radiated from the wearable device, and outputs intensity information indicating measured intensity of the radio wave; and a calculator that calculates a position and an orientation of the wearable device on the body based on the orientation information and the intensity information.

Abstract: A wireless power transmission system and a wireless power transmission method are provided that, even if a power transmitter does not have a communication functionality, can improve a transmission efficiency of power waves transmitted from the power transmitter. The wireless power transmission system includes a power transmitter that transmits a power wave and one or more power receivers that receive the power wave, wherein the power transmitter includes a controller that measures a strength of a power wave transmitted from the power receivers by adjusting at least one of a position of the power transmitter and an orientation of an antenna receiving the power wave transmitted from the power receivers and transmits a power wave to the power receivers in accordance with at least one of the position of the power transmitter and the orientation of the antenna upon the measured strength of the power wave exceeding a predetermined value.

Abstract: 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.

Abstract: 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.

Abstract: Provided is a pulse detection apparatus. The apparatus includes: a pulse wave detector that detects a pulse wave, and outputs a pulse wave signal indicating the pulse wave that has been detected; a threshold value setting circuit that sets a threshold value that changes with time in accordance with an amplitude of the pulse wave signal; and a comparator that compares the pulse wave signal with the threshold value, and outputs, as information indicating a pulse, the pulse wave signal exceeding the threshold value.

Abstract: 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.

Abstract: 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.

Abstract: A moving body state identification system acquires identified information of a moving body by using a small terminal that does not need to charge or replace a battery. The moving body state identification system includes a transceiver that transmits radio waves and wirelessly receives a signal, ID tags that receive the radio waves, convert the received radio waves into power, and use the power as a power supply to transmit unique ID information to the transceiver, and a state information transmitter that is attached to a moving body, receives the radio waves, converts the received radio waves into power, and uses the power as a power supply to transmit state information about a state of the moving body to the transceiver. The transceiver identifies the moving body based on the ID information and the state information.

Abstract: 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.

Abstract: A rolling bearing includes an outer ring supported by a fixed body, an inner ring which supports a rotating shaft, and rolling elements between an inner groove of the outer ring and an outer groove of the inner ring, wherein a curvature radius R of at least the inner groove of the outer ring is in a range of 2r×0.53?R?2r×0.55 in relation to a radius r of one of the rolling elements.

Abstract: A rolling bearing includes an outer ring supported by a fixed body, an inner ring which supports a rotating shaft, and rolling elements between an inner groove of the outer ring and an outer groove of the inner ring, wherein a curvature radius R of at least the inner groove of the outer ring is in a range of 2r×0.53?R?2r×0.55 in relation to a radius r of one of the rolling elements.

Abstract: A first jet tab and a second jet tab are symmetrically arranged with respect to a symmetry plane and have a symmetrical shape with respect to the symmetry plane, and are symmetrically driven with respect to the symmetry plane by a driving section. A distance between a tip of the first jet tab and a first rotation axis is larger than a distance between the first rotation axis and the symmetry plane. A distance between a tip section of the second jet tab and a second rotation axis is larger than a distance between the second rotation axis and the symmetry plane.

Abstract: 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.

Abstract: 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.

Abstract: In estimating the degraded position of a road surface with high accuracy, a server apparatus 210 comprising a part configured to change, when detecting a road surface degradation with respect to a certain road position based on accumulation of measurement information evaluation values at a plurality of times of a travel of a vehicle on the certain road position, detection sensitivity for the road surface degradation according to an MCI value with respect to the certain road surface position, the measurement information evaluation values being measured with an acceleration sensor installed in the vehicle and being according to road surface positions on which the vehicle has traveled.

Abstract: 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.

Abstract: 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.