JP5324901B2 - Non-contact power transmission system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out non-contact data communication at the same time as non-contact power transfer without increase in the circuit scale or cost of the device in a non-contact power transfer device that transfers electric power in a non-contact manner using a magnetic resonance phenomenon so as to inspect whether an amount of transmitted power and an amount of received power have a normal value or authenticate whether power receiving equipment is entitled to receive power or for any other purpose. <P>SOLUTION: A transmission coil and a reception coil used in non-contact power transfer using a magnetic resonance phenomenon at a predetermined magnetic resonance frequency are configured as a helical antenna. A signal equivalent to a constant multiple of a signal at the magnetic resonance frequency is used as a carrier wave. Thus non-contact power transfer and non-contact data communication can be simultaneously carried out with the same coil. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a contactless power transmission device, a contactless power reception device, and a contactless power transmission system, and more particularly to a contactless power transmission device, a contactless power reception device, and a contactless power transmission system using a magnetic resonance phenomenon. is there.

  Currently, as shown in Patent Document 1, a non-contact power transmission technology is actively used in a non-contact IC card, a handset of a stationary telephone, or the like. Since electromagnetic induction is used for these non-contact power transmissions, the transmitted power and the received power are AC signals. For this reason, in order to perform efficient power transmission, it is important that the resonance frequency on the power transmission side matches the resonance frequency on the power reception side. In Patent Document 2, the voltage level in the receiving coil is detected, and the resonance state of the transmitting coil and the receiving coil is controlled so that the detected voltage level always takes the highest value.

  However, in contactless power transmission using electromagnetic induction, the power transmission distance is limited to a range of several millimeters to several centimeters. It is not done.

  While the above technique performs non-contact power transmission by electromagnetic induction, a technique for performing non-contact power transmission using a magnetic resonance phenomenon as in Non-Patent Document 1 has been demonstrated. In non-contact power transmission using the magnetic resonance phenomenon, power transmission is possible even if the distance between the power receiving side and the power transmitting side is several meters.

  The non-contact power transmission device using the magnetic resonance phenomenon can transmit power from several tens of centimeters to several meters away, and therefore has a reception resonance system having the same characteristics as the power receiving side that is the target of non-contact power transmission. It is possible to perform unauthorized power reception by intentionally using another power receiving side. Also, if there is an object in the vicinity that has the same resonance characteristics as the receiving coil in the magnetic resonance phenomenon, the object will receive power and the object will be overheated, or the object will receive power. Therefore, there is a possibility that abnormal power transmission occurs such that the amount of power that can be received by the receiving coil is smaller than the amount of power that should be received. In Patent Literature 3, a data communication system that performs non-contact communication of data is implemented separately from a system that transmits power between a power transmission side and a power reception side, and a power reception system that currently receives power The power transmission system is transmitting data for confirming whether or not the reception system is authorized to receive power normally or the amount of power currently received by the regular power reception system It communicates data to confirm whether it is not extremely attenuated compared to electric power.

JP-A-8-340285 JP-A-11-188113 JP 2007-231567 A Andre Kurs, et al. “Wireless Power Transfer via Strongly Coupled Magnetic Resonances,” SCIENCE, VOL 317, pp.83-85, 6 JULY 2007

  However, if a data communication system different from the system that transmits power is installed between the power transmission side and the power reception side, the circuit scale increases, resulting in an increase in manufacturing cost and the size of the device. There is a problem that enlarging occurs.

  In order to solve such problems, the present invention provides a small-sized non-contact power transmission device, non-contact power reception device, and non-contact power capable of simultaneously performing non-contact power transmission and non-contact data communication. The object is to provide a transmission system.

  In order to achieve the above object, the present invention transmits non-contact power using magnetic resonance at a predetermined magnetic resonance frequency, and non-contact power for transmitting and receiving data converted into a modulation signal in a non-contact manner along with the transmission of the power. A transmission device that generates a first carrier signal having a frequency of the predetermined magnetic resonance frequency and carrying the power, and a second carrier signal having a frequency that is a constant multiple of the first carrier signal. A signal generation unit; a modulation / demodulation unit that generates a first modulated signal by modulating the second carrier signal as a carrier wave with data transmitted from the carrier wave; and demodulates data from the received second modulated signal; A power transmission coil that transmits the first modulation signal generated by the first carrier signal and the modulation / demodulation unit, receives the second modulation signal, and supplies the second modulation signal to the modulation / demodulation unit. Yes.

  In the present invention, power transmitted using magnetic resonance at a predetermined magnetic resonance frequency is received in a contactless manner, and a carrier wave whose frequency is a constant multiple of the magnetic resonance frequency is modulated with data along with the reception of the power. A contactless power receiving device that transmits and receives a modulated signal in a contactless manner, the power receiving coil that receives the transmitted power and transmits and receives the modulated signal, and a load unit that consumes the power received by the power receiving coil, A signal generator that generates a third carrier signal having a frequency that is the frequency of the carrier wave, and a third modulation signal that is received by the power receiving coil is demodulated using the third carrier signal that is generated by the signal generator. And a modulation / demodulation unit that generates the fourth modulated signal by modulating the third carrier signal with data transmitted from the carrier wave as a carrier wave and supplies the modulated signal to the power receiving coil. .

  In addition, the present invention transmits the power in a non-contact manner using magnetic resonance at a predetermined magnetic resonance frequency, and transmits the data as a modulation signal in a non-contact manner together with the transmission of the power in a non-contact manner. A non-contact power transmission system including a power receiving device, wherein the non-contact power transmission device has a first carrier signal whose frequency is the predetermined magnetic resonance frequency and carries the power, and a frequency which is the first. A signal generating unit that generates a second carrier signal that is a constant multiple of the carrier signal, and the second carrier signal as a carrier wave to generate a first modulated signal by modulating the carrier wave with data to be transmitted A modulation / demodulation unit for demodulating data from the received second modulation signal; transmitting the first carrier signal and the first modulation signal generated by the modulation / demodulation unit; and receiving the second modulation signal To the modem. A power receiving coil that receives power from the first carrier signal and transmits and receives the modulated signal, and a load unit that consumes power received by the power receiving coil. A signal generating unit that generates a third carrier signal whose frequency is the frequency of the second carrier signal, and a third modulation signal received by the power receiving coil by the signal generating unit. A modulation / demodulation unit that demodulates using a carrier signal, generates the second modulated signal by modulating the third carrier signal with data transmitted from the carrier wave, and supplies the second modulated signal to the power receiving coil; It is a feature.

  According to the present invention, a small non-contact power transmission device, non-contact power reception device, and non-contact power capable of simultaneously performing non-contact power transmission and ear contact data communication using a magnetic resonance phenomenon at a predetermined magnetic resonance frequency. There is an effect that a transmission system can be realized.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of a non-contact power transmission apparatus according to the present invention.
The non-contact power transmission apparatus of this embodiment includes at least one power transmission unit that transmits power in a non-contact manner using a magnetic resonance phenomenon at a predetermined magnetic resonance frequency, and a magnetic resonance phenomenon at a predetermined magnetic resonance frequency. And at least one power receiving unit that receives power in a contactless manner, and the power transmitting unit has a signal having a predetermined magnetic resonance frequency and a frequency that is a constant multiple of the signal having the predetermined magnetic resonance frequency. And at least one signal generator capable of individually outputting a signal and power can be transmitted using a magnetic resonance phenomenon at the predetermined magnetic resonance frequency, and at the same time a signal at the predetermined magnetic resonance frequency A power transmission coil that is a helical antenna capable of transmitting and receiving data with a signal having a frequency that is a constant multiple of the received signal, the received signal received by the power transmission coil, and the signal generation A signal having a frequency that is a constant multiple of the signal of the predetermined magnetic resonance frequency output from is input, and the received signal can be demodulated, or transmission data transmitted from the power transmission coil is output from the signal generator And at least one modulation / demodulation unit capable of modulating the signal using a signal having a frequency that is a constant multiple of the signal having the predetermined magnetic resonance frequency and outputting the modulated signal to the power transmission coil.

  Further, the power receiving unit uses at least one signal generating unit capable of outputting a signal having a frequency that is a constant multiple of a signal having a predetermined magnetic resonance frequency, and a power using a magnetic resonance phenomenon at the predetermined magnetic resonance frequency. A power receiving coil that is a helical antenna that can receive and transmit data using a signal having a frequency that is a constant multiple of the signal of the predetermined magnetic resonance frequency as a carrier, and the power received by the power receiving coil And a signal having a frequency that is a constant multiple of the signal of the predetermined magnetic resonance frequency output from the signal generator and the received signal received by the power receiving coil are demodulated. A constant of a signal of the predetermined magnetic resonance frequency output from the signal generator that can transmit data transmitted from the power receiving coil And a, and at least one modem unit can be modulated with the frequency of the signal output to the power receiving coil.

  Hereinafter, the operation of the embodiment shown in FIG. 1 will be described in detail. Here, as described above, the power transmission unit 14 that transmits power using a magnetic resonance phenomenon at a predetermined magnetic resonance frequency, and the power reception that receives power using the magnetic resonance phenomenon at the predetermined magnetic resonance frequency. Part 15.

First, the operation of the power transmission unit 14 will be described in detail.
The signal generator 1 outputs a signal having a predetermined magnetic resonance frequency from the resonance signal output terminal 10, and outputs a signal having a frequency that is a constant multiple of the predetermined magnetic resonance frequency from the constant multiple signal output terminal 11. The resonance signal output from the resonance signal output terminal 10 is input from the power transmission coil input / output terminal 3 to the power transmission coil 4 which is a helical antenna, and the constant multiple signal output from the constant multiple signal output terminal 11 is input to the constant multiple signal. The signal is input from the terminal 12 to the modem unit 13.

The power transmission coil 4, which is a helical antenna, transmits the transmission power 8 to the power reception coil 9, which is a helical antenna of the power receiver 15, using a magnetic resonance phenomenon caused by the input resonance signal.
The modulation / demodulation unit 13 to which the constant multiplication signal is input from the constant multiplication signal input terminal 12 modulates the data to be transmitted to the power reception unit 15 using the constant multiplication signal as a carrier wave, and outputs it from the transmission / reception signal input / output terminal 2. The transmission signal output from the transmission / reception signal input / output terminal 2 is input from the power transmission coil input / output terminal 3 to the power transmission coil 4 which is a helical antenna.

  The power transmission coil 4 that is a helical antenna transmits a transmission signal input from the power transmission coil input / output terminal 3 as a radio wave 5 to the power reception coil 9 that is a helical antenna of the power reception unit 15. Further, the power transmission coil 4 that is a helical antenna can receive the radio wave 5 from the power reception coil 9 that is the helical antenna of the power receiving unit 15, and outputs the received signal from the power transmission coil input / output terminal 3.

The reception signal output from the power transmission coil input / output terminal 3 is input from the transmission / reception signal input / output terminal 2 to the modem unit 13.
The modulation / demodulation unit 13 to which the reception signal is input from the transmission / reception signal input / output terminal 2 demodulates the reception signal by using the constant multiple signal input from the constant multiple signal input terminal 12.

Next, the operation of the power receiving unit 15 will be described in detail.
The power receiving coil 9 which is a helical antenna receives the transmission power 8 transmitted by the magnetic resonance phenomenon from the power transmission coil 4 which is the helical antenna of the power transmission unit 14 and the radio wave 5, and receives the received power and the received signal. Are output from the power receiving coil input / output terminal 6. The power output from the power receiving coil input / output terminal 6 is input to the load unit 7, and the load unit 7 consumes the input power. The reception signal output from the power receiving coil input / output terminal 6 is input from the transmission / reception signal input / output terminal 17 to the modem unit.

  The signal generator 20 outputs a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency from the constant multiple signal output terminal 19. The constant multiple signal output from the constant multiple signal output terminal 19 is input to the modem unit 16 from the constant multiple signal input terminal 18.

  The modem unit 16 demodulates the reception signal input from the transmission / reception signal input / output terminal 17 using the constant multiple signal input from the constant multiple signal input terminal 18. Further, the modem unit 16 can also modulate the data to be transmitted to the power transmission unit 14 using the constant multiple signal input from the constant multiple signal input terminal 18 as a carrier wave and output it from the transmission / reception signal input / output terminal 17. The transmission signal output from the transmission / reception signal input / output terminal 17 is input from the power receiving coil input / output terminal 6 to the power receiving coil 9. The power receiving coil 9, which is a helical antenna, transmits a transmission signal input from the power receiving coil input / output terminal 6 to the power transmitting coil 4, which is a helical antenna of the power transmission unit 1, as a radio wave 5.

  Here, FIG. 2 shows an example of an embodiment of the power transmission coil 4 that is a helical antenna and the power reception coil 9 that is a helical antenna, which is a feature of the present invention. Functional blocks similar to those in FIG. 1 are denoted by the same reference numerals.

  The power transmission coil 4 that is a helical antenna includes a power transmission coil input / output terminal 3, a primary coil 21 that is wound once, and a secondary coil 22 that is a helical antenna. The primary coil 21 of one turn and the secondary coil 22 that is a helical antenna have the same diameter, and are coupled and excited by electromagnetic induction.

Here, the predetermined magnetic resonance frequency is f _L (Hz), the wavelength λ _L (m) of the signal of the magnetic resonance frequency, the number of turns of the secondary coil 22 is T, and the total length of the secondary coil 22 is L (m). When the length l (m) of one turn of the secondary coil 22 and the speed of light c (m / s) are given,
λ _L = c / f _L (Equation 1)
It is. In order to perform power transmission using the magnetic resonance phenomenon, L needs to be substantially equal to λ _L / 2. However, due to the parasitic capacitance between the windings of the secondary coil 22, the actual resonance frequency is slightly different. Low value. For this reason, the total length L of the secondary coil is a little shorter than λ _L / 2. Here, L = λ _L / 2 as shown in Equation 1, and hereinafter, the magnetic resonance frequency f _L (Hz) and the helical The relationship with the frequency f _Z (Hz) that can be transmitted by the antenna will be described in an easy-to-understand manner.

The number of turns of the secondary coil 22 is T, and the total length of the secondary coil 22 is
L = λ _L / 2 (m) (Formula 2)
Therefore, the length l of one turn of the secondary coil 22 is
l = L / T = λ _L / 2T (m) (Equation 3)
It becomes. Here, the secondary coil 22 is a helical antenna. The helical antenna can transmit a signal whose wavelength is equal to the length of one turn of the coil. That is, if the wavelength of a signal that can be transmitted by the helical antenna is λ _z and the frequency is f _z ,
λ _z = l = L / T = λ _L / 2T (m) (Formula 4)
f _z = c / λ _z = 2 × T × c / λ _L = 2 × T × f _L (Hz) (Equation 5)
The secondary coil 22 transmits power to the power receiving unit in a non-contact manner using a magnetic resonance phenomenon at a predetermined magnetic resonance frequency f _L (Hz), and the predetermined magnetic resonance expressed by Equation 5 it is possible to send or receive modulated data frequency _f L of 2 × T times (Hz) frequency _{f z = 2 × T × f} L signals (Hz) as a carrier. The winding number T of the secondary coil 22 can be freely set as long as it is a real number of 1 or more. Further, when the number of turns T of the secondary coil 22 is set to an integer, the frequency of the signal that can be transmitted by the helical antenna is f _z = 2 × T × f _L (Hz), so that it is an even multiple of the predetermined magnetic resonance frequency f _L. The higher harmonics can be transmitted. Similarly, when the number of turns T of the secondary coil 22 is set to a multiple of (natural number + 0.5), the frequency of the signal that can be transmitted by the helical antenna is f _z = 2 × T × f _L (Hz). odd harmonics multiple of the frequency of the magnetic resonance frequency f _L becomes possible transmission.

  The power receiving coil 9 that is a helical antenna includes a power transmission coil input / output terminal 6, a primary coil 23 that is wound once, and a secondary coil 24 that is a helical antenna. The one-turn primary coil 23 is the same as the one-turn primary coil 21 and the secondary coil 24 which is a helical antenna is the same as the secondary coil 22 which is the helical antenna.

Next, one example of the embodiment of the signal generator 1 is shown in FIG. The same functional blocks as those in FIG. 1 are denoted by the same reference numerals.
The signal generator 1 includes multipliers / dividers 25a and 25b, a filter circuit 26, a filter circuit 27, an amplifier 28, an oscillator 29, a resonance signal output terminal 10, and a constant multiple signal output terminal 11. ing.

  In the embodiment of FIG. 3, the oscillator 29 outputs a signal having an arbitrary frequency. The signal output from the oscillator 29 is input to the multiplier / dividers 25a and 26b, respectively. The multiplier / divider 25a outputs a signal having a predetermined magnetic resonance frequency using the input signal as a reference frequency signal. The signal output from the multiplier / divider 25 a is input to the filter circuit 26. The filter circuit 26 filters and outputs only a signal having a predetermined magnetic resonance frequency from the input signals. The signal output from the filter circuit 26 is input to the amplifier 28, and the amplifier 28 amplifies the input signal and outputs it from the resonance signal output terminal 10. The multiplier / divider 25b outputs a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency using the input signal as a reference frequency signal. The signal output from the multiplier / divider 25 b is input to the filter circuit 27. The filter circuit 27 suppresses and outputs a frequency component other than a constant multiple of a signal having a predetermined magnetic resonance frequency, which can be transmitted as a helical antenna as described above, from the input signal. The signal output from the filter circuit 27 is output from the constant multiple signal output terminal 11.

Next, an example of an embodiment of the signal generator 20 is shown in FIG. The same functional blocks as those in FIG. 1 are denoted by the same reference numerals.
The signal generator 20 includes a filter circuit 39, a multiplier / divider 40, an oscillator 41, and a constant multiplier signal output terminal 19.
In the embodiment of FIG. 4, the oscillator 41 outputs a signal having an arbitrary frequency. The signal output from the oscillator 41 is input to the multiplier / divider 40. The multiplier / divider 40 outputs a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency using the input signal as a reference frequency signal. The signal output from the multiplier / divider 40 is input to the filter circuit 39. The filter circuit 39 filters and outputs only a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency from the input signals. The signal output from the filter circuit 39 is output from the resonance signal output terminal 19.

Next, an example of the embodiment of the modem unit 13 is shown in FIG. The same functional blocks as those in FIG. 1 are denoted by the same reference numerals.
The modem unit 13 includes a modulator 30, a switching circuit 31, a filter circuit 32, a demodulator 33, a control unit 34, a transmission / reception signal input / output terminal 2, a constant multiple signal input terminal 12, and a modulation signal input terminal. 35, a demodulated signal output terminal 36, a switching circuit input / output terminal 37, and a filter circuit 38.

A constant multiple signal, which is a signal having a frequency that is a constant multiple of a signal having a predetermined magnetic resonance frequency, that can be transmitted as a helical antenna as described above, from the power transmission coil 4 that is input from the constant multiple signal input terminal 12 is the modulator 30 and Each is input to the demodulator 33.
First, the operation of the modem unit 13 when transmitting data from the power transmission unit 14 to the power reception unit 15 will be described in detail.

  When transmitting data from the power transmission unit 14 to the power reception unit 15, the control unit 34 outputs transmission data to the modulator 30, and outputs a modulation signal input terminal 35 and a switching circuit input / output terminal 37 to the switching circuit 31. Outputs a control signal to connect the.

  The modulator 30 modulates the transmission data input from the control unit using the input constant multiple signal as a carrier wave, and outputs it as a transmission signal. The transmission signal output from the modulator 30 is input to the filter circuit 32. The filter circuit 32 suppresses frequency components other than a signal in a frequency band that is a constant multiple of a signal having a predetermined magnetic resonance frequency, which can be transmitted by the power transmission coil 4 as a helical antenna as described above, and outputs the transmitted signal. To do. The transmission signal output from the filter circuit 32 is input from the modulation signal input terminal 35 to the switching circuit 31.

  In the switching circuit 31, the control signal output from the control unit is input, and the modulation signal input terminal 35 and the switching circuit input / output terminal 37 are connected in accordance with the input control signal, whereby the input from the modulation signal input terminal 35. The transmitted signal is output from the switching circuit input / output terminal 37. The transmission signal output from the switching circuit input / output terminal 37 is output from the transmission / reception signal input / output terminal 2.

Next, the operation of the modem unit 13 when transmitting data from the power receiver 15 to the power transmitter 14 will be described in detail.
When transmitting data from the power receiver 15 to the power transmitter 14, the controller 34 outputs a control signal for connecting the demodulated signal output terminal 36 and the switching circuit input / output terminal 37 to the switching circuit 31.
A reception signal is input from the transmission / reception signal input / output terminal 2, and the reception signal is input from the switching circuit input / output terminal 37 to the switching circuit 31. In the switching circuit 31, the control signal output from the control unit is input, and the demodulated signal output terminal 36 and the switching circuit input / output terminal 37 are connected to each other according to the input control signal. The input received signal is output from the demodulated signal input terminal 36.

  The received signal output from the demodulated signal input terminal 36 is input to the filter circuit 38. The filter circuit 38 suppresses frequency components other than a signal in a frequency band that is a constant multiple of a signal having a predetermined magnetic resonance frequency, which can be transmitted as a helical antenna as described above, by the power transmission coil 4 and outputs the received signal. To do. The received signal output from the filter circuit 38 is input to the demodulator 33.

  The demodulator 33 demodulates the received signal input from the filter circuit 38 using the input constant multiple signal as a carrier wave, and outputs received data obtained as a result of demodulating the received signal to the control unit. The control unit receives the received data output from the demodulator.

  The modem unit 16 has the same configuration as the modem unit 13 described above. However, the control signal output from the control unit 34 and the control signal output from the control unit 34 are input, and the operation of the switching circuit 31 based on the input control signal is different from that of the modem unit 13. When transmitting data from the power transmission unit 14 to the power reception unit 15, the control unit 34 outputs a control signal for connecting the demodulated signal output terminal 36 and the switching circuit input / output terminal 37 to the switching circuit 31. When transmitting data from the receiving unit 15 to the power transmitting unit 14, the control unit 34 outputs a control signal for connecting the modulation signal input terminal 35 and the switching circuit input / output terminal 37 to the switching circuit 31.

  When the switching circuit 31 transmits data from the power transmission unit 14 to the power reception unit 15, the control signal output from the control unit 34 is input, and the demodulated signal output terminal 36 and the switching circuit are input based on the input control signal. When the input / output terminal 37 is connected and data is transmitted from the power receiver 15 to the power transmitter 14, the modulation signal input terminal 35 and the switching circuit input / output terminal 37 are connected based on the input control signal. .

  In the configuration of the first embodiment described above, the data transmitted from the power transmission unit 14 to the power reception unit 15 and the data transmitted from the power reception unit 15 to the power transmission unit 14 are both at the same frequency. Are sent and received as radio waves. At this time, if data transmission is simultaneously performed by the power transmission unit 14 and the power reception unit 15, data cannot be transmitted and received accurately. Therefore, the control unit 34 realizes accurate data transmission / reception by controlling the data transmission and reception timing so that the power transmission unit 14 and the power reception unit 15 do not perform data transmission at the same time. .

  With the configuration shown in the present embodiment, a communication system for communicating arbitrary data between the power transmitting side and the receiving side is provided separately from the power transmitting system. Since there is no need, it is possible to realize a small and inexpensive device capable of simultaneously performing contactless power transmission and contactless data communication.

  Conventionally, when a communication system for data communication is combined with a system for transmitting power, a carrier wave for transmitting power is modulated based on the data. In this embodiment, since data communication is performed at a frequency that is a constant multiple of the carrier wave for transmitting power, the data rate for transmission can be increased. In addition, since the carrier wave for transmitting power generally has a large amplitude, modulating this requires a large-scale circuit. In this embodiment, since data communication is performed at a frequency that is a constant multiple of a carrier wave that transmits power, it is possible to perform modulation / demodulation with a signal having a small amplitude suitable for modulation / demodulation processing.

  As the arbitrary data, authentication data for authenticating whether or not the device receiving the power is a device that has the right to receive the power, or the amount of power in which the currently transmitted power is normal It is possible to communicate data for monitoring whether or not. As a result of communicating the authentication data or the data to be monitored, unauthorized power reception where there is a device that receives power even though there is no right to receive power, or power that is currently transmitted is normal When abnormal power transmission that is not the amount of power occurs, it is possible to immediately stop the transmission of power by the power transmission unit 14 and thereby suppress the consumption of power by a device that is transmitting power. Become.

FIG. 6 shows an example of a flowchart of processing for immediately stopping power transmission by the power transmission unit 14 when the unauthorized power reception and the abnormal power transmission occur.
In step S1, authentication data is communicated between a device that transmits power and a device that receives power, and step S2 is executed.
In step S2, the device that transmits the power determines whether the device that receives the power has a right to receive the power. As a result of the determination in step S2, if it is determined that the device that receives the power has the right to receive power (YES in the figure), step S3 is executed. On the other hand, when it is determined that the device that receives power does not have the right to receive power (NO in the figure), step S4 is executed.

In step S3, the device that transmits the power receives data on the amount of power currently received by the device that receives the power from the device that receives the power, and executes step S6.
In step S6, the device that transmits the power, when the amount of power currently transmitted by the device that transmits the power and the data of the received power amount are extremely different (NO in the figure). ), It is determined that abnormal power transmission has occurred, and step S4 is executed. On the other hand, if the amount of power currently transmitted by the device that transmits the power and the data of the received power amount are not extremely different (YES in the figure), abnormal power transmission occurs. Step S3 is executed again after a certain period of time has elapsed.

In step S4, the device that transmits the power notifies the device that receives the power that the transmission of power is stopped, and executes step S5.
In step S5, the device for transmitting power stops the transmission of power by stopping the output of the resonance signal from the resonance signal output terminal 10 shown in FIG.

  By executing the processing flow shown in FIG. 6, unauthorized power reception where there is a device that receives power even though there is no right to receive power, or power that is currently transmitted is normal. When abnormal power transmission or the like occurs, it is possible to immediately stop power transmission by the power transmission unit 14 so that a device that transmits power consumes unnecessary power.

FIG. 7 is a block diagram showing an embodiment of the signal generator 1 different from the embodiment shown in FIG. 3 in the first embodiment of the non-contact power transmission apparatus according to the present invention shown in FIG. Functional blocks similar to those in FIGS. 1 and 3 are denoted by the same reference numerals.
In the embodiment of FIG. 7, the signal generator 1 includes an oscillator 29, a filter circuit 26, a filter circuit 27, an amplifier 28, a resonance signal output terminal 10, and a constant multiple signal output terminal 11.

The oscillator 29 outputs a signal having a predetermined magnetic resonance frequency and a harmonic signal of the signal having the predetermined magnetic resonance frequency. The signal output from the oscillator 29 is input to both the filter circuit 26 and the filter circuit 27. The filter circuit 26 suppresses and outputs a frequency component other than a signal having a predetermined magnetic resonance frequency from the input signal. The signal output from the filter circuit 26 is input to the amplifier 28, and the amplifier 28 amplifies the input signal and outputs it from the resonance signal output terminal 10. The filter circuit 27 suppresses and outputs the frequency components other than the harmonics of the frequency that can be transmitted as the helical antenna as described above from the harmonics of the input signal of the predetermined magnetic resonance frequency. The signal output from the filter circuit 27 is output from the constant multiple signal output terminal 11.
In the present embodiment, the multiplier / dividers 25a and 26b are not required as compared with the embodiment shown in FIG. 3, so that the circuit can be further reduced in size and cost.

FIG. 8 is a block diagram showing an embodiment of a power receiving unit different from the embodiment 1 shown in FIG. Functional blocks similar to those in FIGS. 1 and 4 are denoted by the same reference numerals.
In the present embodiment, unlike the power receiving unit 15 shown in the first embodiment, the power receiving unit 15b includes the load unit 7b instead of the load unit 7 and the signal generating unit 20b instead of the signal generating unit 20. ing.
In the embodiment of FIG. 8, the load section 7b includes a reference signal output terminal 42. The signal generation section 20b includes a filter circuit 39, a multiplier / divider 40, a constant multiple signal output terminal 19, and a reference signal. And an input terminal 43.

The load unit 7 b consumes the input power in the same manner as the load unit 7, and at the same time outputs a part of the input power signal from the reference signal output terminal 42. The signal output from the reference signal output terminal 42 is input from the reference signal input terminal 43 to the signal generator 20b. In the signal generator 20 b, the signal input from the reference signal input terminal 43 is input to the multiplier / divider 40. The multiplier / divider 40 outputs a signal having a constant multiple of a predetermined magnetic resonance frequency using the input signal as a reference signal, and inputs the signal to the filter circuit 39. The filter circuit 39 filters and outputs only a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency from the input signals. The signal output from the filter circuit 39 is output from the constant multiple signal output terminal 19, so that the signal generator 20 b performs a constant multiple of a signal having a frequency that is a constant multiple of a predetermined magnetic resonance frequency in the same manner as the signal generator 20. Output from the signal output terminal 19.
In this embodiment, compared with the signal generator 20 used in the first embodiment shown in FIG. 4, the oscillator 41 is not required, so that it is possible to further reduce the size and cost of the circuit.

FIG. 9 is a block diagram showing an embodiment of a power transmission unit different from the embodiment 1 shown in FIG. Functional blocks similar to those in FIGS. 1 and 5 are denoted by the same reference numerals.
In this embodiment, the power transmission unit 14b includes a data input / output terminal 44 and a modulation / demodulation unit 13b, unlike the power transmission unit 14 shown in the first embodiment.
In the embodiment of FIG. 9, the modem unit 13 b includes a control unit 34 b that can input and output signals to the data input / output terminal 44 in addition to the function of the control unit 34, unlike the embodiment shown in FIG. 5. ing.

  The signal received by the power transmission coil 4 is demodulated by the modem unit 13b and output from the data input / output terminal 44 to the outside of the power transmission unit 14b by the control unit 34b. Data input to the data input / output terminal 44 from the outside of the power transmission unit 14 b is input to the control unit 34 b, modulated by the modem unit 13 b, and transmitted from the power transmission coil 4.

  With the configuration shown in the present embodiment, any data can be input / output to / from the power transmission unit 14b from the outside of the power transmission unit 14b using the data input / output terminal 44. Then, it is possible to communicate with the power receiving unit using the power transmitting unit 14b.

FIG. 10 is a block diagram showing an embodiment of a power receiving unit different from the embodiment shown in FIG. Functional blocks similar to those in FIGS. 1 and 5 are denoted by the same reference numerals.
In the present embodiment, the power receiving unit 15c is different from the power receiving unit 15 shown in FIGS. 1 and 5 described above, and the data input / output terminal 46, the load unit 7c, the modem unit 16b, and the power output terminal 45. And.

  Unlike the embodiment shown in FIGS. 1 and 8, the load unit 7c can output part or all of the input power from the power output terminal 45 to the outside of the power receiving unit 15c. Further, unlike the embodiment shown in FIG. 5, the modem unit 16 b includes a control unit 34 b that can input and output signals to the data input / output terminal 46 in addition to the function of the control unit 34.

  The signal received by the power receiving coil 9 is demodulated by the modem unit 16b and output from the data input / output terminal 46 to the outside of the power receiving unit 15c by the control unit 34b. Data input from the outside of the power receiving unit 15 c to the data input / output terminal 46 is input to the control unit 34 b, modulated by the modem unit 16 b, and transmitted from the power receiving coil 9. Further, part or all of the power received by the power receiving coil 9 is output from the power output terminal 45 to the outside of the power receiving unit 15c by the load unit 7c.

  With the configuration shown in the present embodiment, any data can be input / output to / from the power receiving unit 15c from the outside of the power receiving unit 15c using the data input / output terminal 46. The power transmission unit 14b in FIG. 9 can communicate the arbitrary data with the power reception unit 15c. Further, all or part of the power received by the power receiving unit 15c can be output from the power output terminal 45 to the outside of the power receiving unit 15c.

FIG. 11 shows an embodiment in which power is transmitted to a remote controller in an audiovisual system such as a television operated by a remote controller using the power transmitter 14b and the power receiver 15c shown in the fourth embodiment. It is a block diagram.
This system is composed of a central station having a function of transmitting power and a remote controller having a function of receiving power.

  The central station controls the operation of the central station, authenticates whether the device receiving the power transmitted by the central station has the right to receive power, records data, or inputs data At least one control / signal processing unit that performs signal processing on the received signal, the power transmission unit 14b described in the fourth embodiment, and a signal input / output unit that inputs / outputs a data signal to / from the central station. ing. In addition, the remote control has an input unit for a person using the remote control to operate the remote control, the power receiving unit 15c shown in the fourth embodiment, and the remote control has a right to transmit power by the central station. A control / signal processing unit that performs authentication of whether or not, controls the operation of the remote controller, or performs signal processing on an input signal, and a power use unit that uses power received by the power receiving unit 15c And at least one of each. Note that a rechargeable battery may or may not be provided inside the power use section.

The operation of the embodiment shown in FIG. 11 will be described in detail below.
The central station 47 transmits electric power as electric power 50 transmitted without contact from the electric power transmission unit 14b to the electric power reception unit 15c of the remote controller 55.

  The remote controller 55 receives the power 50 transmitted in a non-contact manner transmitted from the power transmitter 14 b of the central station 47 by the power receiver 15 c, and extracts all or part of the received power from the power output terminal 45. Input to the power usage unit 53. The power usage unit 53 uses the input power to drive the remote controller 55 or charges a rechargeable battery provided in the power usage unit 53.

Further, data communication 51 can be performed between the power transmission unit 14b of the central station 47 and the power reception unit 15c of the remote controller 55.
In this embodiment, the data communication 51 includes a control signal for confirming whether or not the power 50 transmitted in a non-contact manner is a normal power amount, and the remote controller 55 is in a non-contact power operation by the central station 47. Can be used for communication of an authentication signal for performing authentication confirmation of whether or not the device has the right to be transmitted and an operation signal from the remote controller 55.

  The authentication signal communication will be described. When the control / signal processing unit 49 of the central station 47 inputs or outputs the authentication signal and determines that the remote controller 55 is not a device that has the right to transmit power without contact by the central station 47, The transmission of power to the remote controller 55 by the station 47 is stopped. Alternatively, when the control / signal processing unit 54 of the remote controller 55 inputs or outputs the authentication signal and determines that the remote controller 55 is not a device having the right to transmit power in a non-contact manner by the central station 47, The reception of power by the remote controller 55 is stopped.

  The communication of the remote control operation signal will be described. The input unit 52 of the remote controller 55 accepts a user's remote control operation and outputs a remote control operation signal. The remote control operation signal output from the input unit 52 is input to the control / signal processing unit 54, subjected to signal processing, input from the data input / output terminal 46 to the power receiving unit 15 c, and the central station 47 as the data communication 51. To the power transmitter 14b. The power transmission unit 14 b of the central station 47 outputs the received remote control operation signal from the data input / output terminal 44 and inputs it to the control / signal processing unit 49. The remote control operation signal input to the control / signal processing unit 49 is used for control of the central station 47 by the control / signal processing unit 49 or is subjected to signal processing and output to the signal input / output unit 48. The signal input / output unit 48 outputs the input remote control operation signal to a device operated by the remote controller 55. The device operated by the remote controller 55 is a device connected to the central station 47 by wire or wirelessly, or a device to which power is supplied from the central station 47 in a non-contact manner like the remote controller 55.

  The control signal, the authentication signal, and the remote control operation signal are transmitted and received as data communication 51 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.

  The system shown in the present embodiment includes the non-contact power transmission apparatus according to the present invention, and can perform non-contact power transmission to the remote controller 55 and the data communication with the same coil. There is no need to separately provide a power transmission coil and a data communication coil, and the remote controller 55 can be reduced in size, weight, and cost. In addition, the remote controller 55 includes a power use unit 53 that can include a rechargeable battery therein, and power is transmitted from the central station 47 in a non-contact manner, so that the battery does not run out.

  In FIG. 11, only one remote controller 55 is provided as a device capable of contactlessly transmitting power from the central station 47 and transmitting / receiving communication data to / from the central station 47 in this system. However, when a plurality of remote controllers are used in the present system, the central station 47 includes the same number of power transmission units 14b as the number of remote controllers, so that the central station 47 can individually control the plurality of remote controllers. It is also possible to transmit electric power in a contactless manner and to transmit / receive communication data to / from the central station 47.

  In addition, the device operation by the remote controller 55 shown in the present embodiment can be performed by an AV device such as a television, a video camera, a recorder, an audio system, or an air conditioner such as an air conditioner or a fan connected to the central station 47 by wire or wireless. This is possible for any device that can be operated with a remote control.

FIG. 12 shows a monitor display in an audiovisual system such as a TV using the power transmission unit 14b and the power reception unit 15c shown in the fourth embodiment and in which a video display monitor display unit and a functional unit such as a tuner are separated. It is the block diagram which showed the Example in the case of transmitting electric power.
This system includes a central station having a function of transmitting power and a monitor display having a function of receiving power.

  The central station controls the operation of the central station, authenticates whether the device receiving the power transmitted by the central station has the right to receive power, records data, or inputs At least one control / signal processing unit that performs signal processing on the received signal, the power transmission unit 14b described in the fourth embodiment, and a signal input / output unit that inputs / outputs a data signal to / from the central station. ing. Whether the monitor display controls the operation of the power receiving unit 15c shown in the fourth embodiment and the monitor display, or whether the monitor display has a right to transmit power by the central station. A control / signal processing unit that performs authentication or performs signal processing on an input signal, a power use unit that uses power received by the power receiving unit 15c, a display unit that displays video or outputs audio, And at least one input unit to which an operation signal from the remote controller is input. Note that a rechargeable battery may or may not be provided inside the power use section.

The operation of the embodiment shown in FIG. 12 will be described in detail below.
The central station 47 transmits electric power as electric power 56 transmitted in a non-contact manner from the electric power transmission unit 14b to the electric power reception unit 15c of the monitor display 61.

  The monitor display 61 receives the power 56 transmitted from the power transmission unit 14 b of the central station 47 in a contactless manner by the power reception unit 15 c, and extracts all or part of the received power from the power output terminal 45. To the power usage unit 53. The power use unit 53 uses the input power to drive the monitor display 61 or charges a rechargeable battery provided in the power use unit 53.

Further, data communication 57 can be performed between the power transmission unit 14 b of the central station 47 and the power reception unit 15 c of the monitor display 61.
In the present embodiment, the data communication 57 includes a control signal for confirming whether or not the power 56 transmitted in a contactless manner is a normal amount of power, and the monitor display 61 is contacted by the central station 47 in a contactless manner. An authentication signal for confirming whether or not the device has the right to transmit power, a remote control operation signal received by the monitor display 61 from the remote control 63 by the input unit 58, and a display unit of the monitor display 61 It can be used for communication of video and audio data displayed or output at 60.

  The authentication signal communication will be described. When the control / signal processing unit 49 of the central station 47 inputs or outputs the authentication signal and determines that the monitor display 61 is not a device having the right to transmit power in a non-contact manner by the central station 47, The transmission of power to the monitor display 61 by the central station 47 is stopped. Alternatively, when the control / signal processing unit 59 of the monitor display 61 inputs or outputs the authentication signal and determines that the monitor display 61 is not a device that has the right to transmit power without contact by the central station 47. Stops receiving power by the monitor display 61.

  The communication of the remote control operation signal will be described. A remote control signal 62 operated by the user using the remote control 63 is input from the input unit 58 of the monitor display 61. The remote control operation signal input to the input unit 58 is input to the control / signal processing unit 59. The remote control operation signal input to the control / signal processing unit 59 is subjected to signal processing and used for control of the monitor display 61, or is input from the signal input / output terminal 46 to the power receiving unit 15c and is used as the data communication 57. It is transmitted to the power transmission unit 14 b of the central station 47. The power transmission unit 14 b of the central station 47 outputs the received remote control operation signal from the data input / output terminal 44 and inputs it to the control / signal processing unit 49. The remote control operation signal input to the control / signal processing unit 49 is used for controlling the central station 47 by the signal processing unit 49 or is subjected to signal processing and output to the signal input / output unit 48. The signal input / output unit 48 outputs the input remote control operation signal to a device operated by the remote control 63. The device operated by the remote controller 63 is a device connected to the central station 47 by wire or wirelessly, or a device to which electric power is supplied from the central station 47 in a non-contact manner like the monitor display 61.

  The video and audio data communication will be described. The video and audio data is a broadcast signal such as a television broadcast, or a signal recorded on a recorder or a video camera or a music player connected to the central station 47 by wire or wirelessly. The signal input to the central station 47 from the unit 48 or the signal recorded in the control / signal processing unit 49 of the central station 47. The video and audio data input from the signal input / output unit 48 to the central station 47 is input to the control / signal processing unit 49. The video and audio data input to the control / signal processing unit 49 or recorded in the control / signal processing unit 49 is subjected to signal processing, and is input from the data input / output terminal 44 to the power transmission unit 14b for data communication. 57 is transmitted to the power receiver 15 c of the monitor display 61. The video and audio data received by the power receiving unit 15 c is output from the data input / output terminal 46 and input to the control / signal processing unit 59. The control / signal processing unit 59 performs signal processing on the input video and audio data and outputs the processed video and audio data to the display unit 60. The display unit 60 displays or outputs the input video and audio data.

  The control signal, the authentication signal, the remote control operation signal, and the video and audio data are transmitted and received as data communication 57 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.

  The system shown in the present embodiment includes the non-contact power transmission apparatus according to the present invention, and can perform non-contact power transmission to the monitor display 61 and the data communication with the same coil. There is no need to separately provide a contact power transmission coil and a data communication coil, and the monitor display 61 can be reduced in size, weight, and cost. Furthermore, since there is no need for wired power supply to the monitor display 61 and wired connection for transmitting video and audio data to the monitor display 61, there is no need for complicated wiring, avoiding problems due to wiring failure, and It is possible to arrange equipment with a higher degree of freedom.

  In FIG. 12, power is transmitted from the central station 47 in a non-contact manner in this system, and only one monitor display 61 is provided as a device capable of transmitting / receiving communication data to / from the central station 47. However, when a plurality of monitor displays are used in this system, the central station 47 has the same number of power transmission units 14b as the number of monitor displays, so that the plurality of monitor displays can be individually provided. It is also possible to transmit electric power from the central station 47 in a non-contact manner, and to transmit / receive communication data to / from the central station 47.

  Furthermore, this system can simultaneously use one or more remote controllers shown in the fifth embodiment simultaneously with one or more monitor displays shown in the present embodiment. When the one or more monitor displays and one or more remote controls are used at the same time, the central station 47 includes the same number of power transmission units 14b as the total number of monitor displays and remote controls. In addition, power can be individually transmitted from the central station 47 to the one or more remote controllers in a non-contact manner, and communication data can be transmitted to and received from the central station 47.

In this embodiment, a monitor display capable of displaying or outputting the video and audio data is used. However, it is also possible to use a speaker capable of handling only an audio signal instead of the monitor display. . When a speaker is used, the data communication 57 transmitted from the central station 47 is audio data.
In addition, the device operation by the remote controller 63 shown in the present embodiment can be performed by an AV device such as a TV, a video camera, a recorder, an audio system, or an air conditioner such as an air conditioner or a fan connected to the central station 47 by wire or wirelessly. This is possible for any device that can be operated with a remote control.

FIG. 13 shows an implementation in the case where power is transmitted to a video camera in an audio visual system that displays the video of the video camera on a television or the like using the power transmitter 14b and the power receiver 15c shown in the fourth embodiment. It is the block diagram which showed the example.
This system is composed of a central station having a function of transmitting power and a video camera having a function of receiving power.

  The central station controls the operation of the central station, authenticates whether the device receiving the power transmitted by the central station has the right to receive power, records data, or inputs At least one control / signal processing unit that performs signal processing on the received signal, the power transmission unit 14b described in the fourth embodiment, and a signal input / output unit that inputs / outputs a data signal to / from the central station. ing. The video camera controls the operation of the video camera with the power receiving unit 15c shown in the fourth embodiment, or authenticates whether the video camera has the right to transmit power by the central station. A control / signal processing unit that performs or performs signal processing on an input signal, a power use unit that uses power received by the power receiving unit 15c, a recording device that records video and audio data, and video and audio And at least one image pickup unit for shooting and recording. Note that a rechargeable battery may or may not be provided inside the power use section.

Hereinafter, the operation of the embodiment shown in FIG. 13 will be described in detail.
The central station 47 transmits power as power 64 that is transmitted in a non-contact manner from the power transmission unit 14 b to the power reception unit 15 c of the video camera 68.

  The video camera 68 receives the power 64 transmitted from the power transmission unit 14b of the central station 47 in a contactless manner by the power reception unit 15c, and extracts all or part of the received power from the power output terminal 45. To the power usage unit 53. The power use unit 53 uses the input power to drive the video camera 68 or charges a rechargeable battery provided in the power use unit 53.

Further, data communication 65 can be performed between the power transmission unit 14 b of the central station 47 and the power reception unit 15 c of the video camera 68.
In this embodiment, the data communication 65 includes a control signal for confirming whether or not the power 64 transmitted in a contactless manner is a normal amount of power, and the video camera 68 is contacted by the central station 47 in a contactless manner. An authentication signal for confirming whether or not the device has the right to transmit power, and video and audio data recorded in the recording device 66 of the video camera 68, or captured by the imaging unit 89 It can be used for video and audio data communication.

  The authentication signal communication will be described. When the control / signal processing unit 49 of the central station 47 inputs or outputs the authentication signal and determines that the video camera 68 is not a device having the right to transmit power in a non-contact manner by the central station 47, The transmission of power to the video camera 68 by the central station 47 is stopped. Alternatively, when the control / signal processing unit 67 of the video camera 68 inputs or outputs the authentication signal and determines that the video camera 68 is not a device that has the right to transmit power in a non-contact manner by the central station 47. Stops receiving power by the video camera 68.

  The video and audio data communication will be described. The video and audio data are those recorded in the recording device 66 provided in the video camera 68 or those photographed and recorded by the imaging unit 89. The video and audio data recorded in the recording device 66 or captured and recorded by the imaging unit 89 is input to the control / signal processing unit 67 and subjected to signal processing. The video and audio data subjected to the signal processing is input from the data input / output terminal 46 to the power receiving unit 15 c and transmitted as the data communication 65 to the power transmitting unit 14 b of the central station 47. The video and audio data received by the power transmission unit 14 b is output from the data input / output terminal 44 and input to the control / signal processing unit 49. The video and audio data input to the control / signal processing unit 49 is subjected to signal processing and output to the signal input / output unit 48 or recorded in the control / signal processing unit 49. The signal input / output unit 48 outputs the input video and audio data to a device connected to the central station 47 by wire or wirelessly. Further, when the central station 47 includes two or more power transmission units 14b, the video and audio data can be transmitted to the monitor display 61 as described in the sixth embodiment.

  The control signal, the authentication signal, and the video and audio data are transmitted and received as data communication 65 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.

  The system shown in the present embodiment includes the non-contact power transmission apparatus according to the present invention, and can perform non-contact power transmission to the video camera 68 and the data communication with the same coil. There is no need to separately provide a contact power transmission coil and a data communication coil, and the video camera 68 can be reduced in size, weight, and cost. In addition, since power supply by wire to the video camera 68 and wired connection for transmitting video and audio data recorded in the video camera 68 are not necessary, complicated wiring is not necessary, and troubles due to wiring failure can be avoided. Further, it is possible to arrange devices with a higher degree of freedom.

  In FIG. 13, power is transmitted from the central station 47 in a non-contact manner in this system, and only one video camera 68 is used as a device capable of transmitting / receiving communication data to / from the central station 47. However, when using a plurality of video cameras in this system, the central station 47 has the same number of power transmission units 14b as the number of video cameras, so that the plurality of video cameras can be individually provided. It is also possible to transmit electric power from the central station 47 in a non-contact manner, and to transmit / receive communication data to / from the central station 47.

  Further, the present system is configured to simultaneously operate one or more remote controllers shown in the fifth embodiment simultaneously with one or more video cameras shown in the present embodiment, and one or more monitor displays shown in the sixth embodiment. Can be used simultaneously. When the one or more video cameras, one or more remote controllers, and one or more monitor displays are used at the same time, the central station 47 includes the same number of power transmission units 14b as the total number of video cameras, remote controllers, and monitor displays. In this way, power is individually transmitted from the central station 47 to the one or more video cameras, one or more remote controllers and one or more monitor displays in a non-contact manner, and communicated with the central station 47. It is also possible to send and receive data.

FIG. 14 shows an implementation in the case of transmitting power to a recorder in an audiovisual system that displays video recorded on a recorder on a television or the like using the power transmitter 14b and the power receiver 15c shown in the fourth embodiment. It is the block diagram which showed the example.
This system is composed of a central station having a function of transmitting power and a recorder having a function of receiving power.

  The central station controls the operation of the central station, authenticates whether the device receiving the power transmitted by the central station has the right to receive power, records data, or inputs At least one control / signal processing unit that performs signal processing on the received signal, the power transmission unit 14b described in the fourth embodiment, and a signal input / output unit that inputs / outputs a data signal to / from the central station. ing. The recorder controls the operation of the recorder and the power receiver 15c shown in the fourth embodiment, or authenticates whether the recorder has a right to transmit power by the central station, or At least one control / signal processing unit that performs signal processing on the input signal, a power use unit that uses power received by the power receiving unit 15c, and a recording device that records video and audio data, respectively. Have one. Note that a rechargeable battery may or may not be provided inside the power use section.

Hereinafter, the operation of the embodiment shown in FIG. 14 will be described in detail.
The central station 47 transmits electric power as electric power 69 transmitted in a non-contact manner from the electric power transmission unit 14b to the electric power reception unit 15c of the recorder 73.

  The recorder 73 receives the contactless power 69 transmitted from the power transmitter 14 b of the central station 47 by the power receiver 15 c, and extracts all or part of the received power from the power output terminal 45. Input to the power usage unit 53. The power usage unit 53 uses the input power to drive the recorder 73 or charges a rechargeable battery provided in the power usage unit 53.

Further, data communication 70 can be performed between the power transmission unit 14 b of the central station 47 and the power reception unit 15 c of the recorder 73.
In this embodiment, the data communication 70 includes a control signal for confirming whether or not the electric power 69 transmitted in a non-contact manner is a normal power amount, and the recorder 73 is in a non-contact electric power operation by the central station 47. Are recorded in the recording device 71 of the recorder 73 and the authentication signal for performing the authentication confirmation as to whether or not the device has the right to be transmitted, the video and audio data recorded in the recording device 71 of the recorder 73 It can be used for communication of video and audio data.

  The authentication signal communication will be described. When the control / signal processing unit 49 of the central station 47 inputs or outputs the authentication signal and determines that the recorder 73 is not a device having the right to transmit power in a non-contact manner by the central station 47, The transmission of power to the recorder 73 by the station 47 is stopped. Alternatively, when the control / signal processing unit 72 of the recorder 73 inputs or outputs the authentication signal and determines that the recorder 73 is not a device having the right to transmit power in a non-contact manner by the central station 47, The reception of power by the recorder 73 is stopped.

  The video and audio data communication will be described. The video and audio data transmitted from the central station 47 to the recorder 73 is recorded in a broadcast signal such as a television broadcast, or a recorder, a video camera, or a music player connected to the central station 47 by wire or wirelessly. The signal is a signal input to the central station 47 from the signal input / output unit 48 of the central station 47 or a signal recorded in the control / signal processing unit 49 provided in the central station 47. Also, the video and audio data transmitted from the recorder 73 to the central station 47 is recorded in the recording device 71 provided in the recorder 73.

  First, a case where the video and audio data are transmitted from the central station 47 to the recorder 73 will be described. The video and audio data input from the signal input / output unit 48 to the central station 47 is input to the control / signal processing unit 49. The video and audio data input to the control / signal processing unit 49 or recorded in the control / signal processing unit 49 is subjected to signal processing, and is input from the data input / output terminal 44 to the power transmission unit 14b for data communication. 70 is transmitted to the power receiver 15 c of the recorder 73. The video and audio data received by the power receiving unit 15 c is output from the data input / output terminal 46 and input to the control / signal processing unit 72. The control / signal processing unit 72 performs signal processing on the input video and audio data, and records them in the recording device 71.

  Next, a case where the video and audio data are transmitted from the recorder 73 to the central station 47 will be described. The video and audio data recorded in the recording device 66 is input to the control / signal processing unit 72 and subjected to signal processing. The video and audio data subjected to the signal processing is input from the data input / output terminal 46 to the power receiving unit 15 c and transmitted as the data communication 70 to the power transmitting unit 14 b of the central station 47. The video and audio data received by the power transmission unit 14 b is output from the data input / output terminal 44 and input to the control / signal processing unit 49. The video and audio data input to the control / signal processing unit 49 is subjected to signal processing and output to the signal input / output unit 48 or recorded in the control / signal processing unit 49. The signal input / output unit 48 outputs the input video and audio data to a device connected to the central station 47 by wire or wirelessly. Further, when the central station 47 includes two or more power transmission units 14b, the video and audio data can be transmitted to the monitor display 61 as described in the sixth embodiment.

  The control signal, the authentication signal, and the video and audio data are transmitted and received as data communication 70 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.

  The system shown in the present embodiment includes the contactless power transmission device according to the present invention, and can perform contactless power transmission to the recorder 73 and the data communication with the same coil. There is no need to separately provide a power transmission coil and a data communication coil, and the recorder 73 can be reduced in size, weight, and cost. Furthermore, since power supply by wire to the recorder 73 and wired connection for transmitting video and audio data recorded in the recorder 73 are not required, complicated wiring is not necessary, and troubles due to wiring failure are avoided. It is possible to arrange devices with a higher degree of freedom.

  In FIG. 14, power is transmitted from the central station 47 in a contactless manner in this system, and only one recorder 73 is provided as a device that can transmit and receive communication data to and from the central station 47. However, when a plurality of recorders are used in the present system, the central station 47 is provided with the same number of power transmission units 14b as the number of recorders, so that the central station 47 is individually provided for the plurality of recorders. It is also possible to transmit power in a non-contact manner and to transmit / receive communication data to / from the central station 47.

  Furthermore, this system simultaneously has one or more recorders shown in the present embodiment, one or more remote controllers shown in the fifth embodiment, and one or more monitor displays shown in the sixth embodiment. At the same time, it is also possible to simultaneously use one or more video cameras shown in the seventh embodiment. When one or more recorders and one or more remote controllers and one or more monitor displays and one or more video cameras are used at the same time, the central station 47 has the same number as the total number of recorders, remote controllers, monitor displays and video cameras. By providing the power transmission unit 14b, the central station 47 can contact the one or more recorders, the one or more remote controllers, the one or more monitor displays, and the one or more video cameras separately from the central station 47. It is also possible to transmit power and transmit / receive communication data to / from the central station 47.

FIG. 15 is a block diagram showing an embodiment of a portable device charging system using the power transmitter 14b and the power receiver 15c shown in the fourth embodiment.
This system includes a portable device charging device having a function of transmitting power and a portable device having a function of receiving power.

  The portable device charging device controls the operation of the portable device charging device, or authenticates whether or not the device that receives the power transmitted by the portable device charging device has the right to receive power, or the input At least one control / signal processing unit that performs signal processing on the received signal and the power transmission unit 14b described in the fourth embodiment are provided. The portable device includes a power receiver 15c shown in the fourth embodiment, a control / signal processor that authenticates whether the portable device has a right to transmit power by the portable device charging device, At least one charging unit that uses the power received by the power receiving unit 15c for driving the portable device or for charging is provided.

The operation of the embodiment shown in FIG. 15 will be described in detail below.
The mobile device charging device 74 transmits power as power 75 that is transmitted in a non-contact manner from the power transmission unit 14 b to the power reception unit 15 c of the mobile device 80.

The portable device 80 receives the power 75 transmitted in a non-contact manner transmitted from the power transmitter 14b of the portable device charger 74 by the power receiver 15c, and all or part of the received power is received by the power output terminal 45. And input to the charging unit 79. The charging unit 79 uses the input power for driving the portable device 80 or for charging.
In addition, data communication 76 can be performed between the power transmission unit 14 b of the mobile device charging device 74 and the power reception unit 15 c of the mobile device 80.

  In the present embodiment, the data communication 76 includes a control signal for confirming whether or not the electric power 75 transmitted in a non-contact manner is a normal electric energy, and the portable device 80 is not transmitted by the portable device charging device 74. It can be used for communication of an authentication signal for performing authentication confirmation of whether or not the device has the right to transmit power by contact.

  The authentication signal communication will be described. The control / signal processing unit 78 of the portable device charging device 74 inputs or outputs the authentication signal, and determines that the portable device 80 is not a device having the right to transmit power in a contactless manner by the portable device charging device 74. In such a case, the transmission of power to the portable device 80 by the portable device charging device 74 is stopped. Alternatively, the control / signal processing unit 77 of the portable device 80 inputs or outputs the authentication signal, and determines that the portable device 80 is not a device having the right to transmit power in a contactless manner by the portable device charging device 74. If this happens, power reception by the portable device 80 is stopped.

The control signal and the authentication signal are transmitted and received as data communication 76 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.
The system shown in the present embodiment includes the non-contact power transmission device according to the present invention, and can perform non-contact power transmission to the portable device 80 and the data communication with the same coil. There is no need to separately provide a contact power transmission coil and a data communication coil, and the portable device 80 can be reduced in size, weight, and cost. Furthermore, since there is no need for a wired connection for wired power supply to the portable device 80, it is possible to arrange devices with a high degree of freedom.

  In FIG. 15, mobile device 80 is a device that can transmit power in a contactless manner from portable device charging device 74 in this system and can transmit and receive communication data to and from portable device charging device 74. It has only one. However, it is also possible to individually transmit power from a portable device charging device 74 to a plurality of portable devices in a contactless manner, and to transmit / receive communication data to / from the portable device charging device 74. However, when using the plurality of portable devices, the portable device charging device 74 needs to include the same number of power transmission units 14b as the number of portable devices.

  In FIG. 15, mobile device 80 is a device that can transmit power in a contactless manner from portable device charging device 74 in this system and can transmit and receive communication data to and from portable device charging device 74. However, when a plurality of portable devices are used in the system, the portable device charging device 74 includes the same number of power transmission units 14b as the number of portable devices, so that the plurality of portable devices is provided. On the other hand, it is possible to individually transmit power from the portable device charging device 74 in a non-contact manner, and to transmit / receive communication data to / from the portable device charging device 74.

FIG. 16 is a block diagram showing an embodiment of a wireless LAN system using the power transmission unit 14b and the power reception unit 15c shown in the fourth embodiment.
This system includes a wireless LAN terminal having a function of transmitting power and a mobile terminal device having a function of receiving power.

  The wireless LAN terminal has the right to receive power by the power transmission unit 14b shown in the fourth embodiment and a device that controls the operation of the wireless LAN terminal or receives power transmitted by the wireless LAN terminal. The mobile terminal includes at least one control / signal processing unit that authenticates whether or not the input signal is processed, and a connection unit that connects the wireless LAN terminal to a LAN. The apparatus includes a power receiving unit 15c illustrated in the fourth embodiment, a control / signal processing unit that authenticates whether the mobile terminal device has a right to transmit power by the wireless LAN terminal, and the power At least one charging unit that uses the power received by the receiving unit 15c is provided.

Hereinafter, the operation of the embodiment shown in FIG. 16 will be described in detail.
The wireless LAN terminal 81 transmits power as power 84 that is transmitted in a non-contact manner from the power transmission unit 14 b to the power reception unit 15 c of the mobile terminal device 87.

The mobile terminal device 87 receives the power 84 transmitted from the power transmission unit 14b of the wireless LAN terminal 81 in a contactless manner by the power reception unit 15c, and all or part of the received power is received by the power output terminal 45. And input to the charging unit 88. The charging unit 88 uses the input power for driving the mobile terminal device 87 or for charging.
Further, data communication 85 can be performed between the power transmission unit 14 b of the wireless LAN terminal 81 and the power reception unit 15 c of the mobile terminal device 87.

  In the present embodiment, the data communication 85 includes a control signal for confirming whether or not the power 84 transmitted in a contactless manner is a normal power amount, and the mobile terminal device 87 is not connected by the wireless LAN terminal 81. It can be used for communication of an authentication signal and wireless LAN communication data for confirming whether or not the device has the right to transmit power by contact.

  The authentication signal communication will be described. The control / signal processing unit 83 of the wireless LAN terminal 81 inputs or outputs the authentication signal, and determines that the mobile terminal device 87 is not a device having the right to transmit power in a non-contact manner by the wireless LAN terminal 81. In this case, the transmission of power to the mobile terminal device 87 by the wireless LAN terminal 81 is stopped. Alternatively, the control / signal processing unit 86 of the mobile terminal device 87 inputs or outputs the authentication signal, and the mobile terminal device 87 is not a device having a right to transmit power in a non-contact manner by the wireless LAN terminal 81. If it is determined, the power reception by the mobile terminal device 87 is stopped.

Communication of the wireless LAN communication data will be described.
A case where the mobile terminal device 87 receives wireless LAN communication data will be described. Wireless LAN communication data input from the connection unit 82 to the wireless LAN terminal 81 is input to the control / signal processing unit 83 and subjected to signal processing. The wireless LAN communication data subjected to the signal processing is input from the data input / output terminal 44 to the power transmission unit 14 b and transmitted as the data communication 85 to the power reception unit 15 c of the mobile terminal device 87. The wireless LAN communication data received by the power receiving unit 15 c is output from the data input / output terminal 46 and input to the control / signal processing unit 86. The control / signal processing unit 86 performs signal processing on the input wireless LAN communication data, and reception of the wireless LAN communication data of the mobile terminal device 87 is completed.

  Next, a case where the mobile terminal device 87 transmits wireless LAN communication data will be described. The mobile terminal device 87 performs signal processing on the wireless LAN communication data to be transmitted by the control / signal processing unit 86. The wireless LAN communication data subjected to the signal processing is input from the data input / output terminal 46 to the power receiving unit 15 c and transmitted as the data communication 85 to the power transmitting unit 14 b of the wireless LAN terminal 81. The wireless LAN communication data received by the power transmission unit 14 b is output from the data input / output terminal 44 and input to the control / signal processing unit 83. The wireless LAN communication data input to the control / signal processing unit 83 is subjected to signal processing and output from the connection unit 82, and transmission of the wireless LAN communication data of the mobile terminal device 87 is completed.

  The control signal, the authentication signal, and the wireless LAN communication data are transmitted and received as data communication 85 by being superimposed on each other by time division multiplexing, frequency division multiplexing, or code division multiplexing.

  The system shown in the present embodiment includes the contactless power transmission device according to the present invention, and can perform contactless power transmission to the mobile terminal device 87 and the data communication using the same coil. There is no need to separately provide a coil for non-contact power transmission and a coil for data communication, and the mobile terminal device 87 can be reduced in size, weight, and cost. Furthermore, since there is no need for wired connection for wired power supply to the mobile terminal device 87, there is no need for complicated wiring, and it is possible to arrange devices with a high degree of freedom.

  In FIG. 16, mobile terminal device 87 is used as a device that can transmit power in a non-contact manner from wireless LAN terminal 81 in this system and can transmit / receive communication data to / from wireless LAN terminal 81. In the case where a plurality of mobile terminal devices are used in this system, the wireless LAN terminal 81 includes the same number of power transmission units 14b as the number of mobile terminal devices, so that the plurality of mobile terminals It is also possible to individually transmit power to the apparatus from the wireless LAN terminal 81 in a non-contact manner, and to transmit / receive communication data to / from the wireless LAN terminal 81.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the non-contact power transmission device described herein, and it is needless to say that the present invention can be widely applied to other non-contact power transmission devices. Yes.

It is a block diagram of the non-contact electric power transmission apparatus which shows one Example of this invention. It is a block diagram of the power transmission coil and power receiving coil in one Example of this invention. It is a block diagram of the signal generation part in one Example of this invention. It is a block diagram of the signal generation part in one Example of this invention. It is a block diagram of the modem part in one Example of this invention. It is a flowchart of the electric power transmission stop process in one Example of this invention. It is a block diagram of the signal generation part in one Example of this invention. It is a block diagram of the electric power receiving part in one Example of this invention. It is a block diagram of the electric power transmission part in one Example of this invention. It is a block diagram of the electric power receiving part in one Example of this invention. It is a block diagram of the audio visual control system in one Example of this invention. It is a block diagram of the audio visual control system in one Example of this invention. It is a block diagram of the audio visual control system in one Example of this invention. It is a block diagram of the audio visual control system in one Example of this invention. It is a block diagram of the portable equipment charging system in one Example of this invention. It is a block diagram of the wireless LAN system in one Example of this invention.

Explanation of symbols

  1: signal generation unit, 4: power transmission coil, 7, 7b, 7c: load unit, 9: power reception coil, 13, 13b: modulation / demodulation unit, 14, 14b: power transmission unit, 15, 15b, 15c: power reception unit, 16, 16b: Modulation / demodulation unit, 20, 20b: Signal generation unit, 21: Primary coil, 22: Secondary coil, 23: Primary coil, 24: Secondary coil, 25a, 25b: Multiplier / frequency divider, 26, 27 : Filter circuit, 28: Amplifier, 29: Oscillator, 30: Modulator, 31: Switching circuit, 32: Filter circuit, 33: Demodulator, 34, 34b: Control unit, 38, 39: Filter circuit, 40: Multiplier Frequency divider, 41: oscillator, 47: central station, 48: signal input / output unit, 49: control / signal processing unit, 52: input unit, 53: power use unit, 54: control / signal processing unit, 55: remote control , 58 Input unit 59: Control / signal processing unit 60: Display unit 61: Monitor display 63: Remote control 66: Recording device 67: Control / signal processing unit 68: Video camera 71: Recording device 72: Control / signal processing unit, 73: recorder, 74: portable device charging device, 77, 78: control / signal processing unit, 79: charging unit, 80: portable device, 81: wireless LAN terminal, 82: connection unit, 83: Control / signal processing unit, 86: control / signal processing unit, 87: mobile terminal device, 88: charging unit, 89: imaging unit.

Claims (3)

A non-contact power transmitting device and a non-contact power receiving device for transmitting power in a non-contact manner using magnetic resonance at a predetermined magnetic resonance frequency, and transmitting the data as a modulation signal together with the transmission of the power in a non-contact manner; A contactless power transmission system comprising:
The non-contact power transmitter is
A signal generator for generating a first carrier signal carrying the power having a frequency that is the predetermined magnetic resonance frequency, and a second carrier signal having a frequency that is a constant multiple of the first carrier signal;
Using the second carrier signal as a carrier wave, the first carrier signal is modulated to generate a first modulated signal, and the data is demodulated from the second modulated signal received from the non-contact power receiver. A modem unit;
The first carrier signal and the first modulation signal generated by the modulation / demodulation unit are transmitted to the contactless reception device, the second modulation signal is received from the contactless power reception device, and the modulation / demodulation unit receives the second modulation signal. A power supply coil to supply,
The contactless power receiving device is:
A power receiving coil that receives the first carrier signal and the first modulated signal transmitted by the non-contact power transmission device, and transmits the second modulated signal;
A modem that generates data indicating the amount of power of the first carrier signal received by the power receiving coil, and generates the second modulated signal based on the data indicating the amount of power,
The non-contact power transmitter is
The second modulation signal is received by the power transmission coil from the non-contact power receiving device, and the data indicating the amount of power is demodulated by the modem unit,
The first carrier signal received by the non-contact power receiving device with respect to the power amount of the first carrier signal transmitted by the non-contact power transmission device based on data indicating the power amount obtained by demodulation. A case where the amount of power is smaller than the amount of power that can be received is regarded as abnormal transmission, and when the abnormal transmission occurs, control is performed to stop the transmission of power to the non-contact power receiving apparatus. Non-contact power transmission system. The contactless power transmission system according to claim 1,
The non-contact power transmitter is
In the second case, after the set time has elapsed, the transmission of power to the contactless power receiving apparatus is controlled again based on the difference in the amount of power. The contactless power transmission system according to claim 1. The contactless power transmission system according to claim 1 or 2,
The non-contact power transmitter is
Prior to receiving data indicating the amount of power of the first carrier signal received by the contactless power receiver from the contactless power receiver,
Transmitting the authentication data for determining whether or not the contactless power receiving apparatus is allowed to receive power from the contactless power transmitting apparatus to the contactless power receiving apparatus;
A contactless power transmission system that controls whether or not to transmit power to the contactless power receiving apparatus based on a response from the contactless power receiving apparatus to the authentication data.

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