Power supplying and data transmitting method for induction type power supply system

• US 20110264945A1
• Filed: 08/31/2010
• Published: 10/27/2011
• Est. Priority Date: 04/26/2010
• Status: Active Grant

• Current Assignee: Fu Da Tong Technology Co., Ltd.
• Original Assignee: Fu Da Tong Technology Co., Ltd.
• Inventors: Tsai, Ming-Chiu, Chan, Chi-Che
• Granted Patent: US 8,412,963 B2
• Time in Patent Office: Days
• US Class Current: 713/340
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips

Abstract

A power supply and data signal transmission method used in an induction type power supply system consisting of a power supply module and a power-receiving module for transmission of electrical energy and data signal is disclosed. The microprocessor of the power supply module scans the resonant point of the power supply coil to send a segment of energy for recognition of a feedback signal from the power-receiving module and then starts providing power supply after receipt of the feedback signal, and then runs further signal modulation, transmission, data decoding and other follow-up steps, achieving transmission of electrical energy and data signal wirelessly.

Claims

1. A power supply and data signal transmission method used in an induction type power supply system comprising a power supply module and a power-receiving module for transmission of electrical energy and data signal between said power supply module and said power-receiving module, said power supply module comprising a power supply microprocessor, a signal processing unit, a power supply information management unit, a display unit, a power supply driver unit, a power supply signal analysis circuit and a resonant circuit having a power supply coil, said power-receiving module comprising a power-receiving microprocessor, a power-receiving unit, a signal processing unit, a power-receiving information management unit and a resonant circuit having a power-receiving coil, the power supply and data signal transmission method comprising the steps of:

(A01) the built-in software program of said power supply microprocessor initializes a data encoder and a data decoder and defines a pulse length and then enters a standby mode, and then proceeds to step (A02) after a predetermined time interval;

(A02) the built-in software program of said power supply microprocessor automatically converts the frequency and scans resonant frequency, modulated frequency and charging frequency, and then sends a segment of charging frequency to said power supply driver unit, causing said power supply driver unit to drive said power supply coil of said resonant circuit in producing an electromagnetic wave signal;

(A03) said power supply signal analysis circuit analyzes the signal from said power supply coil and determines whether or not the signal is a feedback signal from said power-receiving module, and then proceeds to step (A04) when positive, or returns to step (A02) when negative;

(A04) said power supply microprocessor continuously sends charging frequency to said power supply driver unit, causing said power supply driver unit to drive said power supply coil of said resonant circuit in providing an electromagnetic wave signal to said power-receiving module;

(A05) said power supply microprocessor detects said power supply information management unit, determining whether or not a data is produced and to be transmitted, and then proceeds to step (A07) when positive, or step (A06) when negative;

(A06) said power supply microprocessor detects whether or not said power supply signal analysis circuit receives a signal, and then proceeds to step (A08) when position, or returns to step (A04) when negative;

(A07) said power supply microprocessor runs a data transmission program and modulates the signal, and then proceeds to step (A09) after data transmission;

(A08) said power supply microprocessor runs a data decode program and then proceeds to step (A09) after receipt of data;

(A09) said power supply microprocessor recognizes the content of the data received and judges the request of the program and then sends the data to said power supply information management unit or said display unit subject to the request of the program; and

(A10) said power supply microprocessor monitors charging status by means of a power supply control program and then returns to step (A02) when said power-receiving module is out of the induction range.

2. The power supply and data signal transmission method as claimed in claim 1, wherein said power supply microprocessor runs said data transmission program subject to the steps of:

(B01) said power supply microprocessor runs said data transmission program and modules the signal and then sends out a start signal;

(B02) said power supply microprocessor starts a counter to count the length of the defined start signal;

(B03) said power supply microprocessor outputs the modulated start signal;

(B04) said power supply microprocessor determines the signal in the register thereof to be “

1”

or “

0”

, and then proceeds to step (B05) when the signal is “

1”

, or step (B07) when the signal is “

0”

;

(B05) said power supply microprocessor outputs the modulated signal “

1”

;

(B06) said power supply microprocessor starts the counter to count the length of the signal “

1”

, and then demodulates the modulated signal after counting, and then proceeds to step (B09);

(B07) said power supply microprocessor outputs the modulated signal “

0”

;

(B08) said power supply microprocessor starts said counter to count the length of the signal “

0”

, and then demodulates the modulated signal after counting;

(B09) said power supply microprocessor determines whether or not transmission of all the bits in the register has been done, and then turns off said data transmission program and proceeds to step (A09) when positive, or proceeds to step (B10) when negative;

(B10) send the next bit of the transmitting data in said register to said power supply microprocessor, and then returns to step (B04).

3. The power supply and data signal transmission method as claimed in claim 1, wherein said power supply microprocessor runs said data decode program subject to the steps of:

(C01) said power supply microprocessor executes said data decode program, detecting modulation of the signal;

(C02) said power supply microprocessor counts the pulse length of the received modulated signal;

(C03) said power supply microprocessor judges whether or not the start signal had been received, and then proceeds to step (C04) when positive, or step (C07) when negative;

(C04) said power supply microprocessor judges whether or not the pulse length is within the range of the start signal, and then proceeds to step (C05) when positive, or step (C06) when negative;

(C05) said start signal is recognized, and said power supply microprocessor starts to store the received bits, and then returns to step (C01);

(C06) said start signal fails, said power supply microprocessor ends the software program directly, and then proceeds to step (A09);

(C07) said power supply microprocessor judges whether or not the pulse length is within the range of the logic [1] signal, and then proceeds to step (C08) when positive, or step (C09) when negative;

(C08) said power supply microprocessor judges the bit of the logic [1] has been received and then stores the bit in the internal data register, and then proceeds to step (C12);

(C09) said power supply microprocessor judges whether or not the pulse length is within the range of the logic [0] signal, and then proceeds to step (C11) when positive, or step (C10) when negative;

(C10) the signal is determined to be a noise, and then said power supply microprocessor clears the incomplete bit data, and then proceeds to step (A09);

(C11) said power supply microprocessor judges the bit of logic [0] has been received and then stores the bit in the internal data register;

(C12) the dada register stores the received data;

(C13) said power supply microprocessor judges whether or not receipt of the assigned bits has been done, and then proceeds to step (C14) when positive, or returns to step (C01) when negative; and

(C14) said power supply microprocessor outputs the data to an external electronic apparatus, and then proceeds to step (A09).

4. The power supply and data signal transmission method as claimed in claim 1, wherein said power supply driver unit of said power supply module comprises a half-/full-bridge driver electrically connected to said power supply microprocessor and two MOSFET arrays that are respectively connected to said resonant circuit, said half-/full-bridge driver of said power supply driver unit and said two MOSFET arrays being respectively connected to said power circuit, said two MOSFET arrays being adapted to switch between a full-bridge frequency and a half-bridge frequency such that when in a power supply mode, said two MOSFET arrays drive said power supply coil to oscillate and to further emit electrical energy, said two MOSFET arrays being capable of modulating a signal to enhance the amplitude of the signal for data transmission.

5. The power supply and data signal transmission method as claimed in claim 1, wherein said power supply driver unit of said power supply module changes the output frequency thereof to modulate signal, enhancing the amplitude of the signal for data transmission.

6. The power supply and data signal transmission method as claimed in claim 1, wherein said power supply signal analysis circuit comprises a demodulation detection circuit adapted to demodulate the received signal, and a comparator circuit adapted to convert the demodulated analog signal into a digital signal.

7. The power supply and data signal transmission method as claimed in claim 1, wherein said signal processing unit of said power-receiving module comprises a demodulation detection circuit adapted to demodulate the received signal, and a comparator circuit adapted to convert the demodulated analog signal into a digital signal.

8. The power supply and data signal transmission method as claimed in claim 1, wherein said signal processing unit comprises a carrier amplitude modulation circuit, said carrier amplitude modulation circuit comprising an inductor, a diode and a switch, said switch being switchable to a close-circuit position where said inductor causes floating of the resonant characteristic of said power-receiving coil so that a dynamic modulation is produced within a short time subject to lowering of the signal at the ends of said power-receiving coil and the signal is fed back to said power supply coil of said power supply module.