WE CLAIM:
1. A radio wave measurement system comprising:
an aerial moving body to move or to hover above a measurement target antenna
5 for radiating a radio wave in a sky direction;
a position measurer to measure a position of the aerial moving body and to generate measurement point data representing the position of the aerial moving body;
a measurement point data time adder to add, to the measurement point data,
time data at a point of time when the measurement point data is generated, so as to
10 generate time-added measurement point data;
a measurement antenna mounted on the aerial moving body and to receive the radio wave;
a radio wave measurer mounted on the aerial moving body and to measure received radio wave data including at least one of an amplitude and a phase of the radio 15 wave received by the measurement antenna;
a mobile time device mounted on the aerial moving body and to output time data synchronized with the time data added to the measurement point data;
a received radio wave data time adder mounted on the aerial moving body and to add, to the received radio wave data, the time data outputted from the mobile time 20 device at a point of time when the received radio wave data is measured, so as to generate time-added received radio wave data; and
a radiated radio wave data generator to generate radiated radio wave data
including radio wave source relative position data and the received radio wave data, the
radio wave source relative position data representing the measurement point data as a
25 position relative to the measurement target antenna at a point of time when the received
radio wave data is measured, the point of time being determined from the time data added to the time-added received radio wave data and the time data added to the time-added measurement point data.
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2. The radio wave measurement system according to claim 1, further comprising:
a ground time device installed on a ground and to output time data synchronized
with the mobile time device;
5 a measurement system control device installed on the ground and including the
radiated radio wave data generator; and
a mobile transmitter mounted on the aerial moving body and to send the time-added received radio wave data to the measurement system control device,
wherein
10 the position measurer and the measurement point data time adder are installed
on the ground, and
the measurement point data time adder uses the time data outputted from the ground time device.
15 3. The radio wave measurement system according to claim 1, further
comprising:
a ground time device installed on a ground and to output time data synchronized with the mobile time device;
a measurement system control device installed on the ground and including the 20 radiated radio wave data generator; and
a storage device mounted on the aerial moving body and to store the time-added received radio wave data,
wherein
the position measurer and the measurement point data time adder are installed
25 on the ground,
the measurement point data time adder uses the time data outputted from the ground time device, and
the time-added received radio wave data stored in the storage device is inputted to the radiated radio wave data generator.
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4. The radio wave measurement system according to claim 1, wherein
the position measurer and the measurement point data time adder are mounted
on the aerial moving body,
5 the measurement point data time adder adds, to the measurement point data, the
time data outputted from the mobile time device at the point of time when the measurement point data is generated, so as to generate the time-added measurement point data, and
the radio wave measurement system further comprising:
10 a measurement system control device installed on a ground and including the
radiated radio wave data generator; and
a mobile transmitter mounted on the aerial moving body and to send the time-added received radio wave data and the time-added measurement point data to the measurement system control device. 15
5. The radio wave measurement system according to claim 1, wherein
the position measurer and the measurement point data time adder are mounted on the aerial moving body,
the measurement point data time adder adds, to the measurement point data, the 20 time data outputted from the mobile time device at the point of time when the
measurement point data is generated, so as to generate the time-added measurement point data, and
the radio wave measurement system further comprising:
a measurement system control device installed on a ground and including the
25 radiated radio wave data generator; and
a storage device mounted on the aerial moving body and to store the time-added received radio wave data and the time-added measurement point data
the time-added received radio wave data and the time-added measurement point data that are stored in the storage device are inputted to the radiated radio wave data
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generator.
6. The radio wave measurement system according to claim 1, wherein
the position measurer, the measurement point data time adder, and the radiated
5 radio wave data generator are mounted on the aerial moving body, and
the measurement point data time adder adds, to the received radio wave data, the time data outputted from the mobile time device at the point of time when the measurement point data is generated, so as to generate the time-added received radio wave data. 10
7. The radio wave measurement system according to claim 2 or 3, wherein
times of the mobile time device and the ground time device are calibrated by a radio
wave from a satellite.
15 8. The radio wave measurement system according to any one of claims 4 to 6,
wherein the position measurer that is also used as the mobile time device is a positioning device for measuring a position where the position measurer exists, by receiving radio waves from a plurality of satellites.
20 9. A wireless power transmission device comprising:
a power transmission antenna to transmit power with a radiating radio wave and being capable of changing an orientation direction;
a radiation direction determiner to determine a radiation direction, the radiation
direction being a direction in which an aerial moving body exists, the aerial moving
25 body being a target to transmit the power;
an orientation direction changer to direct the orientation direction of the power transmission antenna toward the radiation direction; and
a transmission signal generator to generate a transmission signal transmitted as the radio wave from the power transmission antenna.
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10. The wireless power transmission device according to claim 9, further comprising:
a pilot reception antenna to receive a pilot signal transmitted by the aerial
5 moving body; and
a radio wave radiation determiner to determine that the power transmission
antenna is allowed to radiate the radio wave when signal strength of the received pilot
signal is greater than or equal to a threshold, and to determine that the power
transmission antenna is not allowed to radiate the radio wave when the signal strength
10 of the received pilot signal is less than the threshold,
wherein the power transmission antenna does not radiate the radio wave when the radio wave radiation determiner determines that the power transmission antenna is not allowed to radiate the radio wave.
15 11. The wireless power transmission device according to claim 9 or 10,
further comprising a radio wave radiation controller to perform control such that the power transmission antenna radiates the radio wave after the radiation direction determiner determines the radiation direction, and such that the power transmission antenna does not radiate the radio wave when the radiation direction is not determined. 20
12. The wireless power transmission device according to any one of claims 9 to 11, wherein
the power transmission antenna is a phased array antenna including:
a plurality of element antennas to radiate the radio waves; and
25 a plurality of element modules provided in each predetermined number
of the element antennas, each of the plurality of element modules including a phase shifter to change a phase of the transmission signal and an amplifier to amplify the transmission signal, and
the orientation direction changer controls a phase shift amount of the phase
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shifter.
13. The wireless power transmission device according to claim 12, wherein
the plurality of element antennas are divided into a plurality of groups, and
5 each of the plurality of groups has an element module that changes a phase and
an amplitude of each of the element antennas included in the group uniformly.
14. A power transmission system to an aerial moving body, the power
transmission system comprising:
10 the wireless power transmission device according to claim 12 or 13;
a power transmission control device to control the wireless power transmission device;
a ground time device installed on a ground and to output time data;
the aerial moving body including a power reception antenna, a measurement
15 antenna, a radio wave measurer, a mobile time device, a received radio wave data time
adder, and a mobile communicator,
the power reception antenna to receive the radio wave radiated by the wireless power transmission device,
the measurement antenna to receive the radio wave radiated by the wireless
20 power transmission device,
the radio wave measurer to measure received radio wave data including electric field strength that is an amplitude of the radio wave received by the measurement antenna,
the mobile time device to output time data synchronized with the ground time
25 device,
the received radio wave data time adder to add, to the received radio wave data, the time data outputted from the mobile time device at a point of time when the received radio wave data is measured, so as to generate time-added received radio wave data,
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the mobile communicator to communicate with the power transmission control device; and
a REV (rotating element electric field vector) method analyzer to obtain an
element electric field phase in each element module based on a REV scenario and REV
5 performing time radio wave data, by performing a REV method, the element electric
field phase being a phase of an element electric field vector generated at a position of the measurement antenna by the radio wave radiated by the element antenna being supplied with the transmission signal outputted from one element module, the REV method scenario defining a phase operation pattern in which a phase shift amount of an
10 operation phase shifter that is a part of the phase shifters is changed repeatedly with at
least a part of the element antennas radiating the radio wave, the REV method performing time radio wave data being the time-added received radio wave data measured by the radio wave measurer during performing the REV method scenario, wherein
15 the power transmission control device includes a power transmission control
communicator to communicate with the mobile communicator and a REV method performing unit to control the wireless power transmission device based on the REV method scenario, and
the orientation direction changer directs the orientation direction toward the
20 radiation direction, under a condition in which each of the plurality of element modules
has a phase reference matched based on the element electric field phase of each element module.
15. The power transmission system to the aerial moving body according to
25 claim 14, wherein
the power transmission control device includes the REV method analyzer, the power transmission control communicator sends, to the mobile communicator, a data acquisition command instructing acquisition of electric field change data generated based on the REV method performing time radio wave data, and
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receives the electric field change data sent by the mobile communicator in accordance with the data acquisition command, and
the REV method analyzer obtains the element electric field phase in each element module based on the electric field change data and the REV method scenario. 5
16. The power transmission system to the aerial moving body according to claim 15, wherein
the electric field change data is the REV method performing time radio wave
data, and
10 the REV method analyzer includes:
a measurement data analyzer to analyze the REV method performing time radio wave data based on the REV method scenario to detect a phase shift amount detection time in each operation phase shifter;
a phase shift amount obtainer to obtain an operation phase shift amount 15 that is a phase shift amount of the operation phase shifter at the phase shift amount detection time based on the REV method scenario; and
an element electric field phase calculator to calculate the element electric field phase based on the operation phase shift amount.
20 17. The power transmission system to the aerial moving body according to
claim 15, wherein
the aerial moving body further includes a measurement data analyzer,
the measurement data analyzer analyzes the REV method performing time radio
wave data in each of a plurality of analysis periods of which the aerial moving body is
25 notified by the data acquisition command and detects a phase shift amount detection
time in each analysis period
the electric field change data is the phase shift amount detection time, and the REV method analyzer includes:
a phase shift amount obtainer to obtain an operation phase shift amount
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that is a phase shift amount of the operation phase shifter at the phase shift amount detection time based on the REV method scenario; and
an element electric field phase calculator to calculate the element electric field phase based on the operation phase shift amount. 5
18. The power transmission system to the aerial moving body according to
claim 15, wherein
in the REV method scenario, the phase operation pattern is expressed by one or
more reference events in which time is designated and a non-reference event in which
10 time is expressed by a relative time from any one of the reference events,
the aerial moving body includes:
a data storage device to store the REV method scenario; and a measurement data analyzer to analyze the REV method performing time radio wave data in each of a plurality of analysis periods set based on the time of 15 the reference event of which the aerial moving body is notified by the data acquisition command and the REV method scenario, and to detect a phase shift amount detection time in each analysis period,
the electric field change data is the phase shift amount detection time, and
the REV method analyzer includes:
20 a phase shift amount obtainer to obtain an operation phase shift amount
that is a phase shift amount of the operation phase shifter at the phase shift amount detection time based on the REV method scenario; and
an element electric field phase calculator to calculate the element electric field phase based on the operation phase shift amount. 25
19. The power transmission system to the aerial moving body according to
any one of claims 16 to 18, wherein
the power transmission control device includes a phase operation recorder to record phase operation data that is a temporal change in a phase shift amount of the
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operation phase shifter during performing the REV method scenario, and
the phase shift amount obtainer obtains the operation phase shift amount by referring to the phase operation data at the phase shift amount detection time.
5 20. The power transmission system to the aerial moving body according to
any one of claims 16 to 18, wherein
in the REV method scenario, the phase operation pattern is expressed by one or
more reference events in which the time is designated and the non-reference event in
which the time is expressed by the relative time from any one of the reference events,
10 and
the phase shift amount obtainer obtains the operation phase shift amount based on the time of the reference event, the REV method scenario, and the phase shift amount detection time.
15 21. The power transmission system to the aerial moving body according to
claim 14, wherein
in the REV method scenario, the phase operation pattern is expressed by one or more reference events in which time is designated and a non-reference event in which time is expressed by a relative time from any one of the reference events,
20 the power transmission control communicator sends an electric field calculation
command obtaining the element electric field phase to the mobile communicator, and receives the element electric field phase sent by the mobile communicator in accordance with the electric field calculation command, and the aerial moving body includes:
25 a data storage device to store the REV method scenario;
a measurement data analyzer to analyze the REV method performing time radio wave data to detect a phase shift amount detection time in each operation phase shifter based on the time of the reference event of which the aerial moving body is notified by the electric field calculation command and the REV method scenario;
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a phase shift amount obtainer to obtain an operation phase shift amount
that is a phase shift amount of the operation phase shifter at the phase shift amount
detection time based on the time of the reference event and the REV method scenario;
and
5 the REV method analyzer to obtain the element electric field phase from
the operation phase shift amount.
22. The power transmission system to the aerial moving body according to
any one of claims 14 to 21, wherein the phase operation pattern is defined such that the
10 operation phase shifter takes each of a plurality of different phase shift amounts of
operation phase shifters for at least a predetermined duration.
23. The power transmission system to the aerial moving body according to
any one of claims 14 to 22, wherein the REV method performing unit performs the
15 REV method scenario after the radiation direction determiner determines the radiation
direction.
24. The power transmission system to the aerial moving body according to
any one of claims 14 to 23, wherein
20 in the REV method scenario, the phase shift amount of a part of the phase
shifters is changed with low power at which a power of the radio wave is determined less than a half of rated power and normal power at which a power is determined greater than or equal to the half of the rated power, with at least a part of the element antennas radiating the radio wave, and
25 the REV method performing unit performs a portion of the normal power in the
REV method scenario, under a condition in which each of the plurality of element modules has a phase reference matched based on the element electric field phase of each element module obtained by performing a portion of the low power in the REV method scenario.
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