A contactless power supply system with two-way wireless communication

Abstract

The present invention provides a contactless power supply system for two-way wireless communication, including a power supply side and a power receiving side; the power supply side includes a power supply unit, a power supply coil, a first modulation unit, a first transmitting coil, a first demodulation unit, and a first receiving coil; the power receiving side includes a power receiving unit, a power receiving coil, a second modulation unit, a second transmitting coil, a second demodulation unit, and a second receiving coil; the power supply coil is arranged opposite to the power receiving coil; the first transmitting coil is arranged opposite to the second receiving coil; the first receiving coil is arranged opposite to the second transmitting coil. The contactless power supply system for two-way wireless communication of the present invention realizes two-way wireless communication between the power supply side and the power receiving side while realizing contactless power supply between the power supply side and the power receiving side.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a contactless power supply system for bidirectional wireless communications. Background Art

[0002] In the prior art, many devices need to realize non-contact power supply from one object to another, such as two objects moving relative to each other, and devices without external power supply interface due to some special reasons. At the same time, these devices require data communication between two non-contact objects.

[0003] At present, the commonly used data communication methods include optical communication, 433MHz or 2.4GHz and other general wireless communication methods. However, optical communication has high structural requirements, and the price of optoelectronic devices at higher communication rates is also high; the use of general wireless communication methods is prone to interference, and requires a microprocessor to control and set the wireless communication chip, which also increases the cost and complexity. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a contactless power supply system with two-way wireless communication, which realizes contactless power supply between the power supply side and the power receiving side and realizes two-way wireless communication between the power supply side and the power receiving side.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a contactless power supply system for bidirectional wireless communication, including a power supply side and a power receiving side; the power supply side includes a power supply unit, a power supply coil, a first modulation unit, a first transmitting coil, a first demodulation unit, and a first receiving coil; the power supply unit is connected to the power supply coil, the first modulation unit is connected to the first transmitting coil, and the first receiving coil is connected to the first demodulation unit; the power receiving side includes a power receiving unit, a power receiving coil, a second modulation unit, a second transmitting coil, a second demodulation unit, and a second receiving coil; the power receiving unit is connected to the power receiving coil, the second modulation unit is connected to the second transmitting coil, and the second receiving coil is connected to the second demodulation unit; the power supply coil and the power receiving coil are arranged opposite to each other to realize power transmission through electromagnetic coupling; the first transmitting coil and the second receiving coil are arranged opposite to each other to realize wireless communication from the power supply side to the power receiving side through electromagnetic coupling; the first receiving coil and the second transmitting coil are arranged opposite to each other to realize wireless communication from the power receiving side to the power supply side through electromagnetic coupling.

[0006] In one embodiment of the present invention, the power supply side includes a first frame, and the first transmitting coil, the power supply coil and the first receiving coil are sequentially mounted on the first frame; the power receiving side includes a second frame, and the second receiving coil, the power receiving coil and the second transmitting coil are sequentially mounted on the second frame; the first frame and the second frame are arranged opposite to each other.

[0007] In one embodiment of the present invention, the power supply unit includes an inverter circuit for converting external direct current power into alternating current power.

[0008] In one embodiment of the present invention, the power receiving unit includes a rectifier and filter circuit for converting the alternating current generated by the power receiving coil into a direct current.

[0009] In one embodiment of the present invention, the first modulation unit includes a first carrier generation subunit and a first data modulation subunit;

[0010] The first carrier generation subunit is used to generate a first high-frequency carrier signal;

[0011] The first data modulation subunit is connected to the first carrier generation subunit and the first transmitting coil, and is used to modulate the first high-frequency carrier signal and the data signal to generate a first high-frequency modulation signal, and input the first high-frequency modulation signal into the first transmitting coil.

[0012] In one embodiment of the present invention, the first demodulation unit includes a first filtering subunit, a first detection subunit and a first shaping subunit;

[0013] The first filtering subunit is used to filter the high-frequency modulation signal generated by the first receiving coil;

[0014] The first detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal;

[0015] The first shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent from the power receiving side.

[0016] In one embodiment of the present invention, the second modulation unit includes a second carrier generation subunit and a second data modulation subunit;

[0017] The second carrier generation subunit is used to generate a second high-frequency carrier signal;

[0018] The second data modulation subunit is connected to the second carrier generation subunit and the second transmitting coil, and is used to modulate the second high-frequency carrier signal and the data signal to generate a second high-frequency modulation signal, and input the second high-frequency modulation signal into the second transmitting coil.

[0019] In one embodiment of the present invention, the second demodulation unit includes a second filtering subunit, a second detection subunit and a second shaping subunit;

[0020] The second filtering subunit is used to filter the high-frequency modulation signal generated by the second receiving coil;

[0021] The second detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal;

[0022] The second shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent from the power supply side.

[0023] In one embodiment of the present invention, when the power supply side and the power receiving side adopt full-duplex communication, the frequencies of the carrier signals adopted by the first modulation unit and the second modulation unit are different; when the power supply side and the power receiving side adopt half-duplex communication, the frequencies of the carrier signals adopted by the first modulation unit and the second modulation unit are the same or different.

[0024] In one embodiment of the present invention, the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil are disposed on a circuit board.

[0025] As described above, the contactless power supply system of the bidirectional wireless communication of the present invention has the following beneficial effects:

[0026] (1) It is possible to realize contactless power supply between the power supply side and the power receiving side, and realize two-way wireless communication between the power supply side and the power receiving side;

[0027] (2) Simple structure and low cost;

[0028] (3) Good anti-interference performance, high transmission bandwidth and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a contactless power supply system with two-way wireless communication in one embodiment of the present invention.

[0030] Component number description

[0031] 1 Power supply side

[0032] 11 Power supply unit

[0033] 12 Power supply coil

[0034] 13. First modulation unit

[0035] 14. First transmitting coil

[0036] 15. First receiving coil

[0037] 16. First demodulation unit

[0038] 2 Power receiving side

[0039] 21 Power receiving unit

[0040] 22 Receiving coil

[0041] 23. Second modulation unit

[0042] 24 Second transmitting coil

[0043] 25 Second receiving coil

[0044] 26 Second demodulation unit DETAILED DESCRIPTION

[0045] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0047] The contactless power supply system with two-way wireless communication of the present invention can realize contactless power supply and two-way wireless communication between the power supply side and the power receiving side simultaneously, and has a simple structure and high reliability.

[0048] like Figure 1 As shown, in one embodiment, the contactless power supply system of bidirectional wireless communication of the present invention includes a power supply side 1 and a power receiving side 2 .

[0049] The power supply side 1 includes a power supply unit 11, a power supply coil 12, a first modulation unit 13, a first transmitting coil 14, a first receiving coil 15 and a first demodulation unit 16. The power supply unit 11 is connected to the power supply coil 12, the first modulation unit 13 is connected to the first transmitting coil 14, and the first receiving coil 15 is connected to the first demodulation unit 16.

[0050] The power receiving side 2 includes a power receiving unit 21, a power receiving coil 22, a second modulation unit 23, a second transmitting coil 24, a second receiving coil 25 and a second demodulation unit 26. The power receiving unit 21 is connected to the power receiving coil 22, the second modulation unit 23 is connected to the second transmitting coil 24, and the second receiving coil 25 is connected to the second demodulation unit 26.

[0051] The power supply coil 12 and the power receiving coil 33 are arranged opposite to each other to realize power transmission through electromagnetic coupling; the first transmitting coil 14 and the second receiving coil 25 are arranged opposite to each other to realize wireless communication from the power supply side 1 to the power receiving side 2 through electromagnetic coupling; the first receiving coil 15 and the second transmitting coil 24 are arranged opposite to each other to realize wireless communication from the power receiving side 2 to the power supply side 1 through electromagnetic coupling.

[0052] Specifically, the power supply unit 11 provides AC power to the power supply coil 12, and the power supply coil 12 generates an alternating electromagnetic field according to the AC power; the power receiving coil 22 induces a corresponding alternating current according to the alternating electromagnetic field, thereby realizing an energy transmission channel from the power supply side 1 to the power receiving side 2.

[0053] Preferably, the power supply unit 11 is provided with an external power interface for connecting external electric energy, thereby providing power for the electric devices on the power supply side 1. In one embodiment of the present invention, the power supply unit 11 includes an inverter circuit for converting external direct current electric energy into alternating current electric energy. In one embodiment of the present invention, the power receiving unit 21 includes a rectifier filter circuit for converting the alternating current generated by the power receiving coil 22 into direct current.

[0054] When the power supply side 1 sends a data signal to the power receiving side 2, the first modulation unit 13 generates a high-frequency modulated transmission signal of the data signal; the first transmitting coil 14 generates a high-frequency modulated electromagnetic field according to the high-frequency modulated transmission signal; the second receiving coil 25 generates a high-frequency modulated receiving signal according to the high-frequency modulated electromagnetic field; the second demodulation unit 26 demodulates the high-frequency modulated receiving signal to obtain the data signal sent by the power supply side 1.

[0055] In one embodiment of the present invention, the first modulation unit 13 includes a first carrier generation subunit and a first data modulation subunit; the first carrier generation subunit is used to generate a first high-frequency carrier signal; the first data modulation subunit is connected to the first carrier generation subunit and the first transmitting coil, and is used to modulate the first high-frequency carrier signal and the data signal to generate a first high-frequency modulation signal, and input the first high-frequency modulation signal into the first transmitting coil. Specifically, the first modulation unit 13 includes a data interface for receiving a data signal from the power supply side 1.

[0056] In one embodiment of the present invention, the second demodulation unit 26 includes a second filtering subunit, a second detection subunit and a second shaping subunit; the second filtering subunit is used to filter the high-frequency modulated signal generated by the second receiving coil; the second detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal; the second shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent from the power supply side. That is to say, the received high-frequency modulated signal is first filtered to remove useless signals; then envelope detection is performed to obtain the data signal after amplitude demodulation; finally, waveform shaping is performed to obtain the restored data signal. Specifically, the second demodulation unit 26 includes a data interface for outputting the demodulated data signal.

[0057] When the power receiving side 2 sends a data signal to the power supply side 1, the second modulation unit 23 generates a high-frequency modulated transmission signal of the data signal; the second transmitting coil 24 generates a high-frequency modulated electromagnetic field according to the high-frequency modulated transmission signal; the first receiving coil 15 generates a high-frequency modulated receiving signal according to the high-frequency modulated electromagnetic field; the first demodulation unit 16 demodulates the high-frequency modulated receiving signal to obtain the data signal sent by the power receiving side 2.

[0058] In one embodiment of the present invention, the second modulation unit 23 includes a second carrier generation subunit and a second data modulation subunit; the second carrier generation subunit is used to generate a second high-frequency carrier signal; the second data modulation subunit is connected to the second carrier generation subunit and the second transmitting coil, and is used to modulate the second high-frequency carrier signal and the data signal to generate a second high-frequency modulation signal, and input the second high-frequency modulation signal into the second transmitting coil. Specifically, the second modulation unit 23 includes a data interface for receiving a data signal from the power receiving side 2.

[0059] In one embodiment of the present invention, the first demodulation unit 16 includes a first filtering subunit, a first detection subunit and a first shaping subunit; the first filtering subunit is used to filter the high-frequency modulated signal generated by the first receiving coil; the first detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal; the first shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent by the power receiving side. That is to say, the received high-frequency modulated signal is first filtered to remove useless signals; then envelope detection is performed to obtain the data signal after amplitude demodulation; finally, waveform shaping is performed to obtain the restored data signal. Specifically, the first demodulation unit 16 includes a data interface for outputting the demodulated data signal.

[0060] In one embodiment of the present invention, when the power supply side and the power receiving side adopt full-duplex communication, the frequencies of the carrier signals adopted by the first modulation unit and the second modulation unit are different. This is because in full-duplex communication, the power supply side and the power receiving side send data at the same time, and the modulated carrier signals on both sides will be induced in the receiving coils on both sides at the same time. Therefore, the frequencies of the carrier signals adopted by the first modulation unit and the second modulation unit need to be different so as to remove the interference between the carrier signals on both sides through filtering.

[0061] When the power supply side and the power receiving side adopt half-duplex communication, the frequencies of the carrier signals adopted by the first modulation unit and the second modulation unit are the same or different. This is because in half-duplex communication, the power supply side and the power receiving side do not send data at the same time, so the carrier signals on both sides can use the same frequency or different frequencies.

[0062] In one embodiment of the present invention, the power supply side includes a first skeleton, and the first transmitting coil, the power supply coil and the first receiving coil are sequentially mounted on the first skeleton; the power receiving side includes a second skeleton, and the second receiving coil, the power receiving coil and the second transmitting coil are sequentially mounted on the second skeleton; the first skeleton and the second skeleton are arranged relative to each other. Specifically, the second skeleton is arranged in the first skeleton or the first skeleton is arranged in the second skeleton, so as to realize the interaction between the first transmitting coil and the second receiving coil, the power supply coil and the power receiving coil, and the first receiving coil and the first transmitting coil. Preferably, the first skeleton and the second skeleton are both cylindrical.

[0063] Since the carrier frequency used in the present invention is relatively high, the number of turns of the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil is less than that of the power supply coil and the power receiving coil, and the space occupied is small. Therefore, the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil can share a skeleton with the power supply coil and the power receiving coil, or can be directly printed on a circuit board. In one embodiment of the present invention, the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil are arranged on a circuit board.

[0064] In summary, the non-contact power supply system of the present invention can realize non-contact power supply between the power supply side and the power receiving side, and realize two-way wireless communication between the power supply side and the power receiving side; it has a simple structure and low cost; it has good anti-interference performance, high transmission bandwidth and high reliability. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A contactless power supply system with two-way wireless communication, characterized in that: Including power supply side and power receiving side; The power supply side includes a power supply unit, a power supply coil, a first modulation unit, a first transmitting coil, a first demodulation unit, and a first receiving coil; The power supply unit is connected to the power supply coil, the first modulation unit is connected to the first transmitting coil, and the first receiving coil is connected to the first demodulation unit; The power receiving side includes a power receiving unit, a power receiving coil, a second modulation unit, a second transmitting coil, a second demodulation unit, and a second receiving coil; the power receiving unit is connected to the power receiving coil, the second modulation unit is connected to the second transmitting coil, and the second receiving coil is connected to the second demodulation unit; The power supply coil and the power receiving coil are arranged opposite to each other to realize power transmission through electromagnetic coupling; the first transmitting coil and the second receiving coil are arranged opposite to each other to realize wireless communication from the power supply side to the power receiving side through electromagnetic coupling; the first receiving coil and the second transmitting coil are arranged opposite to each other to realize wireless communication from the power receiving side to the power supply side through electromagnetic coupling; The power supply side includes a first frame, and the first transmitting coil, the power supply coil and the first receiving coil are sequentially mounted on the first frame; the power receiving side includes a second frame, and the second receiving coil, the power receiving coil and the second transmitting coil are sequentially mounted on the second frame; the first frame and the second frame are arranged opposite to each other, and the number of turns of the first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil is less than that of the power supply coil and the power receiving coil, When the power supply side sends a data signal to the power receiving side, the first modulation unit generates a high-frequency modulated transmission signal of the data signal; the first transmitting coil generates a high-frequency modulated electromagnetic field according to the high-frequency modulated transmission signal; the second receiving coil generates a high-frequency modulated receiving signal according to the high-frequency modulated electromagnetic field; the second demodulation unit demodulates the high-frequency modulated receiving signal, so that the power receiving side obtains the data signal sent by the power supply side; the first modulation unit includes a first carrier generation subunit and a first data modulation subunit; the first carrier generation subunit is used to generate a first high-frequency carrier signal; the first data modulation subunit is connected to the first carrier generation subunit and the first transmitting coil, and is used to modulate the first high-frequency carrier signal and the data signal to generate a first high-frequency modulation signal, and input the first high-frequency modulation signal into the first transmitting coil; When the power receiving side sends a data signal to the power supply side, the second modulation unit generates a high-frequency modulated transmission signal of the data signal; the second transmitting coil generates a high-frequency modulated electromagnetic field according to the high-frequency modulated transmission signal; the first receiving coil generates a high-frequency modulated receiving signal according to the high-frequency modulated electromagnetic field; the first demodulation unit demodulates the high-frequency modulated receiving signal to obtain the data signal sent by the power receiving side, and the first demodulation unit includes a first filtering subunit, a first detection subunit and a first shaping subunit; the first filtering subunit is used to filter the high-frequency modulated signal generated by the first receiving coil; the first detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal; the first shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent by the power receiving side; The second modulation unit includes a second carrier generation subunit and a second data modulation subunit; The second carrier generation subunit is used to generate a second high-frequency carrier signal; The second data modulation subunit is connected to the second carrier generation subunit and the second transmitting coil, and is used to modulate the second high-frequency carrier signal and the data signal to generate a second high-frequency modulation signal, and input the second high-frequency modulation signal into the second transmitting coil; The second demodulation unit includes a second filtering subunit, a second detection subunit and a second shaping subunit; The second filtering subunit is used to filter the high-frequency modulation signal generated by the second receiving coil; The second detection subunit is used to perform envelope detection on the filtered high-frequency modulated signal; The second shaping subunit is used to shape the high-frequency modulated signal after envelope detection to obtain the data signal sent from the power supply side.

2. The contactless power supply system for bidirectional wireless communication according to claim 1, characterized in that: The power supply unit comprises an inverter circuit for converting external direct current power into alternating current power.

3. The contactless power supply system of bidirectional wireless communication according to claim 1, characterized in that: The power receiving unit includes a rectifying and filtering circuit for converting the alternating current generated by the power receiving coil into a direct current.

4. The contactless power supply system for bidirectional wireless communication according to claim 1, characterized in that: When the power supply side and the power receiving side adopt full-duplex communication, the frequencies of the carrier signals used by the first modulation unit and the second modulation unit are different; when the power supply side and the power receiving side adopt half-duplex communication, the frequencies of the carrier signals used by the first modulation unit and the second modulation unit are the same or different.

5. The contactless power supply system of bidirectional wireless communication according to claim 1, characterized in that: The first transmitting coil, the first receiving coil, the second transmitting coil and the second receiving coil are arranged on a circuit board.

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