Electronic tag reading circuit

Abstract

The embodiment of the invention discloses an electronic tag reading circuit. The electronic tag reading circuit comprises a first antenna used for transmitting a signal of a first frequency; the first frequency conversion module is in communication connection with the first antenna and is used for carrying out up-conversion or down-conversion on a signal input into the first frequency conversion module; the second antenna is used for transmitting signals of a second frequency, and the first frequency is smaller than the second frequency; the second frequency conversion module is in communication connection with the second antenna; the controller is in communication connection with the first frequency conversion module and the second frequency conversion module, and is used for generating a reading signal when receiving a signal transmitted by the first frequency conversion module, transmitting the reading signal to the second antenna through the second frequency conversion module, performing protocol conversion on the received signal transmitted by the second frequency conversion module, and transmitting the converted signal to the second antenna; and the converted signal is transmitted to the first antenna through the first frequency conversion module. According to the electronic tag reading circuit provided by the embodiment of the invention, the circuit structure can be simplified, the circuit size is reduced, and the circuit cost is reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to communication technology, and in particular to a circuit for reading an electronic tag. Background Art

[0002] When an electronic device such as a mobile phone reads an electronic tag such as an ultra-high frequency RFID (Radio Frequency Identification) electronic tag, it needs to be implemented through an electronic tag reading circuit.

[0003] At present, the existing electronic tag reading circuit usually needs to design a Bluetooth module, which communicates with the Bluetooth module in the electronic tag reading circuit through the Bluetooth built into the mobile phone to realize the mobile phone's reading function of electronic tags such as ultra-high frequency RFID electronic tags. However, the circuit structure of the Bluetooth module is complex, which makes the circuit volume larger and the cost higher. Summary of the invention

[0004] The embodiment of the present invention provides a circuit for reading an electronic tag, so as to simplify the circuit structure, reduce the circuit volume and lower the circuit cost.

[0005] An embodiment of the present invention provides a circuit for reading an electronic tag, comprising:

[0006] A first antenna, used to transmit a signal of a first frequency;

[0007] A first frequency conversion module, connected to the first antenna for up-converting or down-converting a signal input thereto;

[0008] a second antenna, configured to transmit a signal of a second frequency, wherein the first frequency is lower than the second frequency;

[0009] A second frequency conversion module, connected to the second antenna for up-converting or down-converting a signal input thereto;

[0010] The controller is communicatively connected with the first frequency conversion module and the second frequency conversion module, and is used to generate a read signal when receiving a signal transmitted by the first frequency conversion module, transmit the read signal to the second antenna through the second frequency conversion module, perform protocol conversion on the received signal transmitted by the second frequency conversion module, and transmit the converted signal to the first antenna through the first frequency conversion module.

[0011] Optionally, the first frequency conversion module includes a first up-conversion unit and a first down-conversion unit, the first up-conversion unit is used to up-convert the signal transmitted by the controller and transmit it to the first antenna, and the first down-conversion unit is used to down-convert the signal transmitted by the first antenna and transmit it to the controller.

[0012] Optionally, the second frequency conversion module includes a second up-conversion unit and a second down-conversion unit, the second up-conversion unit is used to up-convert the signal transmitted by the controller and transmit it to the second antenna, and the second down-conversion unit is used to down-convert the signal transmitted by the second antenna and transmit it to the controller.

[0013] Optionally, the first up-conversion unit is a modulator, and the first down-conversion unit is a demodulator.

[0014] Optionally, frequencies of signals transmitted by the first up-conversion unit and the first down-conversion unit are both the first frequency, and the first frequency is 13.56 MHz.

[0015] Optionally, the frequencies of signals transmitted by the second up-conversion unit and the second down-conversion unit are both the second frequency, and the second frequency is 900 MHz or 920 MHz.

[0016] Optionally, the second up-conversion unit is a modulator, and the second down-conversion unit is a demodulator.

[0017] Optionally, the electronic tag reading circuit also includes an energy collection module, which is communicatively connected to the first antenna, the first frequency conversion module, the second frequency conversion module and the controller. The energy collection module is used to collect energy transmitted by the first antenna and power the first frequency conversion module, the second frequency conversion module and the controller through the collected energy.

[0018] Optionally, the electronic tag reading circuit also includes a rectifier, and the energy collection module is communicatively connected to the first antenna via the rectifier. The rectifier is used to convert the energy transmitted by the first antenna into direct current, and transmit the direct current to the energy collection module.

[0019] Optionally, the signal transmitted by the first antenna to the first frequency conversion module includes a first carrier signal and a first modulation signal, and the first frequency conversion module is used to transmit the first modulation signal to the controller; the signal transmitted by the second antenna to the second frequency conversion module includes a second carrier signal and a second modulation signal, and the second frequency conversion module is used to transmit the second modulation signal to the controller.

[0020] The electronic tag reading circuit provided in an embodiment of the present invention includes: a first antenna, which is used to transmit a signal of a first frequency; a first frequency conversion module, which is communicatively connected to the first antenna and is used to up-convert or down-convert the signal input to itself; a second antenna, which is used to transmit a signal of a second frequency, and the first frequency is less than the second frequency; a second frequency conversion module, which is communicatively connected to the second antenna and is used to up-convert or down-convert the signal input to itself; a controller, which is communicatively connected to the first frequency conversion module and the second frequency conversion module, and is used to generate a read signal when receiving a signal transmitted by the first frequency conversion module, transmit the read signal to the second antenna through the second frequency conversion module, and perform protocol conversion on the signal received from the second frequency conversion module, and transmit the converted signal to the first antenna through the first frequency conversion module. The electronic tag reading circuit provided in the embodiment of the present invention realizes that after an electronic device such as a mobile phone transmits a signal to the first antenna, the second antenna transmits the signal to an electronic tag such as an ultra-high frequency RFID electronic tag and receives a signal emitted by the ultra-high frequency RFID electronic tag, and the read signal, i.e., the signal emitted by the ultra-high frequency RFID electronic tag, is transmitted to the mobile phone through the first antenna, by sequentially transmitting the signal from the first antenna, the first frequency conversion module, the controller, and the second frequency conversion module to the second antenna, and the signal from the second antenna, the second frequency conversion module, the controller, and the first frequency conversion module to the first antenna, so that the mobile phone can realize the reading function of the ultra-high frequency RFID electronic tag through the electronic tag reading circuit, without the need to design Bluetooth, thereby solving the problems of complex circuit structure, large volume, and high cost caused by Bluetooth, thereby simplifying the circuit structure, reducing the circuit volume, and reducing the circuit cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural block diagram of a circuit for reading an electronic tag provided by an embodiment of the present invention;

[0022] Figure 2 It is a structural block diagram of another electronic tag reading circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] Figure 1 : is a structural block diagram of a circuit for reading an electronic tag provided by an embodiment of the present invention. Figure 1 The electronic tag reading circuit includes: a first antenna 11, a second antenna 12, a first frequency conversion module 21, a second frequency conversion module 22 and a controller 30.

[0025] Among them, the first antenna 11 is used to transmit a signal of a first frequency; the first frequency conversion module 21 is communicated with the first antenna 11, and is used to up-convert or down-convert the signal input to itself; the second antenna 12 is used to transmit a signal of a second frequency, and the first frequency is less than the second frequency; the second frequency conversion module 22 is communicated with the second antenna 12, and is used to up-convert or down-convert the signal input to itself; the controller 30 is communicated with the first frequency conversion module 21 and the second frequency conversion module 22, and is used to generate a read signal when receiving a signal transmitted by the first frequency conversion module 21, transmit the read signal to the second antenna 12 through the second frequency conversion module 22, and perform protocol conversion on the signal transmitted by the second frequency conversion module 22, and transmit the converted signal to the first antenna 11 through the first frequency conversion module 21.

[0026] Specifically, the electronic tag reading circuit can be applied to electronic devices such as mobile phones, and pasted on the back of the mobile phone shell, so that the mobile phone can read electronic tags such as ultra-high frequency RFID electronic tags through the circuit. The reading process is: the first antenna 11 receives the high-frequency signal, i.e., the signal of the first frequency, emitted by the mobile phone, and transmits the signal emitted by the mobile phone to the first frequency conversion module 21. When the first frequency conversion module 21 receives the signal transmitted by the first antenna 11, it down-converts the signal transmitted by the first antenna 11 and transmits it to the controller 30. When the controller 30 receives the signal transmitted by the first frequency conversion module 21, it generates a carrier such as a 900MHz carrier and a reading signal (the reading signal complies with the ultra-high frequency RFID protocol such as ISO18000-6c), and transmits the carrier and the reading signal to the second frequency conversion module 22. The second frequency conversion module 22 modulates the carrier and the reading signal, i.e., up-converts the frequency, and transmits them to the second antenna 12. The signal is transmitted to the ultra-high frequency RFID electronic tag through the second antenna 12, so that communication is established between the second antenna 12 and the ultra-high frequency RFID electronic tag to activate the ultra-high frequency RFID electronic tag. After the UHF RFID electronic tag is activated, the UHF RFID electronic tag sends an UHF signal, i.e., a signal of the second frequency, to the second antenna 12. The second antenna 12 transmits the signal sent by the UHF RFID electronic tag to the second frequency conversion module 22. When the second frequency conversion module 22 receives the signal transmitted by the second antenna 12, it down-converts the signal transmitted by the second antenna 12 and transmits it to the controller 30. When the controller 30 receives the signal transmitted by the second frequency conversion module 22, it performs protocol conversion on the signal transmitted by the second frequency conversion module 22 and transmits the converted signal to the first frequency conversion module 21. When the first frequency conversion module 21 receives the signal transmitted by the controller 30, it up-converts the signal transmitted by the controller 30 and transmits it to the first antenna 11. The signal sent by the UHF RFID electronic tag is transmitted to the mobile phone through the first antenna 11, so that the mobile phone can read the UHF RFID electronic tag through the electronic tag reading circuit.

[0027] The electronic tag reading circuit provided in this embodiment includes: a first antenna, which is used to transmit a signal of a first frequency; a first frequency conversion module, which is communicatively connected to the first antenna and is used to up-convert or down-convert the signal input to itself; a second antenna, which is used to transmit a signal of a second frequency, and the first frequency is less than the second frequency; a second frequency conversion module, which is communicatively connected to the second antenna and is used to up-convert or down-convert the signal input to itself; a controller, which is communicatively connected to the first frequency conversion module and the second frequency conversion module and is used to generate a read signal when receiving a signal transmitted by the first frequency conversion module, transmit the read signal to the second antenna through the second frequency conversion module, perform protocol conversion on the signal received from the second frequency conversion module, and transmit the converted signal to the first antenna through the first frequency conversion module. The electronic tag reading circuit provided in this embodiment transmits signals from the first antenna, the first frequency conversion module, the controller, and the second frequency conversion module in the circuit to the second antenna in sequence, and transmits signals from the second antenna, the second frequency conversion module, the controller, and the first frequency conversion module to the first antenna in sequence, so that after an electronic device such as a mobile phone transmits a signal to the first antenna, the second antenna transmits the signal to an electronic tag such as an ultra-high frequency RFID electronic tag and receives a signal emitted by the ultra-high frequency RFID electronic tag, and transmits the read signal, i.e., the signal emitted by the ultra-high frequency RFID electronic tag, to the mobile phone through the first antenna, so that the mobile phone can read the ultra-high frequency RFID electronic tag through the electronic tag reading circuit, without the need to design Bluetooth, thereby solving the problems of complex circuit structure, large volume, and high cost caused by Bluetooth, thereby simplifying the circuit structure, reducing the circuit volume, and reducing the circuit cost.

[0028] Figure 2 is a structural block diagram of another electronic tag reading circuit provided by an embodiment of the present invention. Figure 2 Optionally, the first frequency conversion module 21 includes a first up-conversion unit 21A and a first down-conversion unit 21B, the first up-conversion unit 21A is used to up-convert the signal transmitted by the controller 30 and transmit it to the first antenna 11, and the first down-conversion unit 21B is used to down-convert the signal transmitted by the first antenna 11 and transmit it to the controller 30.

[0029] Specifically, the first up-conversion unit 21A is used to receive the signal transmitted by the controller 30, and up-convert the signal transmitted by the controller 30 and transmit it to the first antenna 11. The first down-conversion unit 21B is used to receive the signal transmitted by the first antenna 11, and down-convert the signal transmitted by the first antenna 11 and transmit it to the controller 30. In addition, the signal transmitted by the first up-conversion unit 21A and the signal transmitted by the first down-conversion unit 21B are both unidirectional transmissions, and the transmission flow directions are respectively from the controller 30 to the first up-conversion unit 21A and then transmitted to the first antenna 11, and from the first antenna 11 to the first down-conversion unit 21B and then transmitted to the controller 30.

[0030] refer to Figure 2 Optionally, the second frequency conversion module 22 includes a second up-conversion unit 22A and a second down-conversion unit 22B, the second up-conversion unit 22A is used to up-convert the signal transmitted by the controller 30 and transmit it to the second antenna 12, and the second down-conversion unit 22B is used to down-convert the signal transmitted by the second antenna 12 and transmit it to the controller 30.

[0031] Specifically, the second up-conversion unit 22A is used to receive the signal transmitted by the controller 30, and up-convert the signal transmitted by the controller 30 and transmit it to the second antenna 12. The second down-conversion unit 22B is used to receive the signal transmitted by the second antenna 12, and down-convert the signal transmitted by the second antenna 12 and transmit it to the controller 30. In addition, the signal transmitted by the second up-conversion unit 22A and the signal transmitted by the second down-conversion unit 22B are both unidirectional transmissions, and the transmission flow directions are respectively from the controller 30 to the second up-conversion unit 22A and then to the second antenna 12, and from the second antenna 12 to the second down-conversion unit 22B and then to the controller 30.

[0032] Optionally, the first up-conversion unit 21A is a modulator, and the first down-conversion unit 21B is a demodulator.

[0033] The function of the first up-conversion unit 21A can be regarded as the modulation function of the modulator on the signal, and the function of the first down-conversion unit 21B can be regarded as the demodulation function of the demodulator on the signal. Specifically, the first up-conversion unit 21A up-converts, i.e., modulates, the signal transmitted by the controller 30 and transmits it to the first antenna 11, and the first down-conversion unit 21B down-converts, i.e., demodulates, the signal transmitted by the first antenna 11 and transmits it to the controller 30.

[0034] Optionally, the signal frequencies transmitted by the first up-conversion unit 21A and the first down-conversion unit 21B are both the first frequency, and the first frequency is 13.56 MHz. The signal transmitted by the first antenna is a high-frequency signal such as a 13.56 MHz signal, and the magnitude of the first frequency is only for schematic illustration, which can be determined according to actual communication requirements and is not limited here.

[0035] Optionally, the frequencies of signals transmitted by the second up-conversion unit 22A and the second down-conversion unit 22B are both the second frequency, and the second frequency is 900 MHz or 920 MHz.

[0036] Exemplarily, the second frequency is 900MHz or 920MHz, and the signal transmitted by the second antenna is an ultra-high frequency signal such as a 900MHz signal, so as to realize the conversion of a high frequency signal such as a 13.56MHz signal into an ultra-high frequency such as a 900MHz signal. In addition, the size of the second frequency is only for illustrative purposes and can be determined according to actual communication requirements, and is not limited here.

[0037] Optionally, the second up-conversion unit 22A is a modulator, and the second down-conversion unit 22B is a demodulator.

[0038] The function of the second up-conversion unit 22A can be regarded as the modulation function of the modulator on the signal, and the function of the second down-conversion unit 22B can be regarded as the demodulation function of the demodulator on the signal. Specifically, the second up-conversion unit 22A up-converts the signal transmitted by the controller 30, i.e., modulates it, and transmits it to the second antenna 12, and the second down-conversion unit 22B down-converts the signal transmitted by the second antenna 12, i.e., demodulates it, and transmits it to the controller 30.

[0039] Continue to refer Figure 2 Optionally, the electronic tag reading circuit further includes an energy collection module 40, which is in communication connection with the first antenna 11, the first frequency conversion module 21, the second frequency conversion module 22 and the controller 30. The energy collection module 40 is used to collect energy transmitted by the first antenna 11, and to power the first frequency conversion module 21, the second frequency conversion module 22 and the controller 30 through the collected energy. The energy collection module 40 can also be used as an energy storage module, and the excess energy can be stored in the energy collection module 40.

[0040] Continue to refer Figure 2 Optionally, the electronic tag reading circuit further includes a rectifier 50, and the energy collection module 40 is connected to the first antenna 11 through the rectifier 50. The rectifier 50 is used to convert the energy transmitted by the first antenna 11 into direct current, and transmit the direct current to the energy collection module 40. Among them, the energy collection module 40 outputs direct current to power the first frequency conversion module 21, the second frequency conversion module 22 and the controller 30. The size of the direct current can be determined according to the actual power supply demand and is not limited here.

[0041] Optionally, the signal transmitted by the first antenna 11 to the first frequency conversion module 21 includes a first carrier signal and a first modulation signal, and the first frequency conversion module 21 is used to transmit the first modulation signal to the controller 30; the signal transmitted by the second antenna 12 to the second frequency conversion module 22 includes a second carrier signal and a second modulation signal, and the second frequency conversion module 22 is used to transmit the second modulation signal to the controller 30.

[0042] Specifically, the first frequency conversion module 21 performs down-conversion on the first carrier signal and the first modulation signal, i.e., demodulates the first modulation signal, and transmits the first modulation signal to the controller 30. The controller 30 generates a second carrier signal and a read signal according to the first modulation signal, and transmits the second carrier signal and the read signal to the second frequency conversion module 22. The second frequency conversion module 22 performs up-conversion on the second carrier signal and the read signal, i.e., modulates the read signal into the second carrier signal, and transmits the modulated signal to the UHF RFID electronic tag through the second antenna 12. When the second frequency conversion module 22 receives the second carrier signal and the second modulation signal transmitted by the second antenna 12, it performs down-conversion on the second carrier signal and the second modulation signal, demodulates the second modulation signal, and transmits the second modulation signal to the controller 30. The controller 30 performs protocol conversion on the second modulated signal, and transmits the converted signal (including the first carrier signal and the read signal) to the first frequency conversion module 21. The first frequency conversion module 21 up-converts the first carrier signal and the read signal, modulates the read signal into the first carrier signal, and transmits the modulated signal to the first antenna 11, so as to transmit the signal to the mobile phone through the first antenna 11, so that the mobile phone can realize the reading function of the ultra-high frequency RFID electronic tag by reading the electronic tag circuit.

[0043] The electronic tag reading circuit provided in this embodiment transmits signals from the first antenna, the first down-conversion unit, the controller, and the second up-conversion unit to the second antenna in sequence, and transmits signals from the second antenna, the second down-conversion unit, the controller, and the first up-conversion unit to the first antenna in sequence, so that after an electronic device such as a mobile phone transmits a signal to the first antenna, the second antenna transmits the signal to an electronic tag such as an ultra-high frequency RFID electronic tag and receives a signal emitted by the ultra-high frequency RFID electronic tag, and transmits the read signal, i.e., the signal emitted by the ultra-high frequency RFID electronic tag, to the mobile phone through the first antenna, so that the mobile phone can read the ultra-high frequency RFID electronic tag through the electronic tag reading circuit, without the need to design Bluetooth, thereby solving the problems of complex circuit structure, large volume, and high cost caused by Bluetooth, thereby simplifying the circuit structure, reducing the circuit volume, and reducing the circuit cost.

[0044] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A circuit for reading an electronic tag, characterized in that: include: A first antenna, used to transmit a signal of a first frequency; A first frequency conversion module, connected to the first antenna for up-converting or down-converting a signal input thereto; a second antenna, configured to transmit a signal of a second frequency, wherein the first frequency is lower than the second frequency; A second frequency conversion module, connected to the second antenna for up-converting or down-converting a signal input thereto; The controller is communicatively connected with the first frequency conversion module and the second frequency conversion module, and is used to generate a read signal when receiving a signal transmitted by the first frequency conversion module, transmit the read signal to the second antenna through the second frequency conversion module, perform protocol conversion on the received signal transmitted by the second frequency conversion module, and transmit the converted signal to the first antenna through the first frequency conversion module.

2. The electronic tag reading circuit according to claim 1, characterized in that: The first frequency conversion module includes a first up-conversion unit and a first down-conversion unit. The first up-conversion unit is used to up-convert the signal transmitted by the controller and transmit it to the first antenna. The first down-conversion unit is used to down-convert the signal transmitted by the first antenna and transmit it to the controller.

3. The electronic tag reading circuit according to claim 1, characterized in that: The second frequency conversion module includes a second up-conversion unit and a second down-conversion unit. The second up-conversion unit is used to up-convert the signal transmitted by the controller and transmit it to the second antenna. The second down-conversion unit is used to down-convert the signal transmitted by the second antenna and transmit it to the controller.

4. The electronic tag reading circuit according to claim 2, characterized in that: The first up-conversion unit is a modulator, and the first down-conversion unit is a demodulator.

5. The electronic tag reading circuit according to claim 2, characterized in that: The frequencies of signals transmitted by the first up-conversion unit and the first down-conversion unit are both the first frequency, and the first frequency is 13.56 MHz.

6. The electronic tag reading circuit according to claim 3, characterized in that: The frequencies of signals transmitted by the second up-conversion unit and the second down-conversion unit are both the second frequency, and the second frequency is 900 MHz or 920 MHz.

7. The electronic tag reading circuit according to claim 3, characterized in that: The second up-conversion unit is a modulator, and the second down-conversion unit is a demodulator.

8. The electronic tag reading circuit according to claim 1, characterized in that: It also includes an energy collection module, which is communicatively connected to the first antenna, the first frequency conversion module, the second frequency conversion module and the controller. The energy collection module is used to collect energy transmitted by the first antenna and power the first frequency conversion module, the second frequency conversion module and the controller through the collected energy.

9. The electronic tag reading circuit according to claim 8, characterized in that: It also includes a rectifier, and the energy collection module is communicatively connected to the first antenna through the rectifier. The rectifier is used to convert the energy transmitted by the first antenna into direct current and transmit the direct current to the energy collection module.

10. The electronic tag reading circuit according to claim 1, characterized in that: The signal transmitted by the first antenna to the first frequency conversion module includes a first carrier signal and a first modulation signal, and the first frequency conversion module is used to transmit the first modulation signal to the controller; the signal transmitted by the second antenna to the second frequency conversion module includes a second carrier signal and a second modulation signal, and the second frequency conversion module is used to transmit the second modulation signal to the controller.

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