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CN-121984540-A - NFC power supply detection device and method and NFC system

CN121984540ACN 121984540 ACN121984540 ACN 121984540ACN-121984540-A

Abstract

The invention discloses an NFC power supply detection device, an NFC power supply detection method and an NFC system, wherein the NFC power supply detection device comprises an NFC chip, an NFC antenna module and a control module, and when the NFC antenna module receives electromagnetic signals, the NFC antenna module supplies power to the control module; the control module obtains the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sends the power supply state to the NFC chip so that the NFC chip sends out prompt. According to the technical scheme, through the synergistic effect of the NFC chip, the NFC antenna module and the control module, the power supply state of the NFC antenna module can be monitored and fed back in real time, communication interruption or functional failure caused by insufficient power supply is avoided, the stability of a system is improved, the equipment can prompt a user to adjust the position of the equipment in time under the condition of insufficient power supply, continuous operation of the equipment is ensured, and the reliability and user experience of the equipment are improved.

Inventors

  • LI ZHENMING

Assignees

  • 深圳市文鼎创数据科技有限公司

Dates

Publication Date
20260505
Application Date
20241025

Claims (10)

  1. 1. The NFC power supply detection device is characterized by comprising an NFC chip, an NFC antenna module and a control module, wherein the control module is respectively connected with the NFC chip and the NFC antenna module; when the NFC antenna module receives an electromagnetic signal, power is supplied to the control module; the control module obtains the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sends the power supply state to the NFC chip so that the NFC chip sends out a prompt.
  2. 2. The NFC power detection device of claim 1, wherein the NFC power detection device further comprises a current consumption module, the current consumption module coupled to the control module; And when the control module controls the current consumption module to start working, detecting the power supply voltage, and judging the power supply state of the NFC antenna module according to the power supply voltage and a preset voltage value.
  3. 3. The NFC power supply detection apparatus according to claim 2, wherein the current consumption module includes a load resistor, one end of the load resistor is connected to an output end of the control module, and the other end of the load resistor is grounded.
  4. 4. The NFC power detection device as claimed in claim 1, wherein said NFC antenna module comprises an NFC antenna coil and a voltage conversion module, said NFC antenna coil being connected to said voltage conversion module, said voltage conversion module being connected to said control module; The NFC antenna coil receives electromagnetic signals and converts the electromagnetic signals into alternating current signals, and the voltage conversion module converts the alternating current signals into direct current signals and outputs the direct current signals to the control module.
  5. 5. The NFC power detection device as claimed in claim 4, wherein said NFC antenna module further comprises a first capacitor module and a second capacitor module, said first capacitor module being positioned between said NFC antenna coil and said voltage conversion module to form a resonant circuit with said NFC antenna coil, said second capacitor module being positioned between said voltage conversion module and said control module to filter a DC signal output by said voltage conversion module.
  6. 6. A detection method based on the NFC power supply detection device according to claim 1, wherein the detection method includes: And acquiring the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sending the power supply state to the NFC chip so that the NFC chip sends out a prompt.
  7. 7. The method of detecting according to claim 6, wherein obtaining the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module includes: when the control current consumption module starts to work, the power supply voltage is detected, and the power supply state of the NFC antenna module is judged according to the power supply voltage and a preset voltage value.
  8. 8. The method of detecting according to claim 7, wherein determining the power supply state of the NFC antenna module according to the voltage value of the power supply voltage and the preset voltage value includes: when the power supply voltage is lower than a preset voltage value, judging that the NFC antenna module is insufficient in power supply; Otherwise, when the power supply voltage tends to be stable, the NFC antenna module is judged to be normal in power supply.
  9. 9. The method of detecting as claimed in claim 7, wherein controlling the current consumption module to start operating further comprises, after: And outputting a PWM control signal to the current consumption module to enable the current consumption module to consume preset current.
  10. 10. An NFC system is characterized by comprising the NFC power supply detection device and the NFC read-write equipment according to any one of claims 1 to 5, wherein the NFC chip sends prompt information to the NFC read-write equipment, and the NFC read-write equipment displays the prompt information.

Description

NFC power supply detection device and method and NFC system Technical Field The present invention relates to the field of wireless communications technologies, and in particular, to an NFC power supply detection device and method, and an NFC system. Background In the prior art, NFC (NEAR FIELD Communication) technology is widely applied to payment, authentication, access control, and other scenes. The NFC device performs data transmission and energy acquisition in an electromagnetic induction manner, and power supply of the device is not needed in general, and particularly, the passive NFC device is not needed, and the working electric energy of the device is completely dependent on an electromagnetic field provided by a card reading terminal. However, when the NFC device approaches the card reading terminal, although the terminal can recognize basic information such as a type and a serial number of the NFC device, when complex data interaction or encryption operation is required, communication may be interrupted or failed due to insufficient power supply. This is due to the fact that the energy transfer between the NFC device and the card reading terminal is not stable, especially in case the device is not properly located or is remote from the card reading terminal, it is difficult for the device to receive sufficient energy from the terminal. Particularly, when performing high-power operations or data exchange, such as authentication or encryption, a user may find a communication failure due to insufficient energy in the middle and late stages of the procedure, so that the device position has to be readjusted, which wastes a lot of time. Disclosure of Invention The embodiment of the invention provides an NFC power supply detection device, an NFC power supply detection method and an NFC system, which are used for solving the technical problems. An embodiment of the invention provides an NFC power supply detection device, which comprises an NFC chip, an NFC antenna module and a control module, wherein the control module is respectively connected with the NFC chip and the NFC antenna module; when the NFC antenna module receives an electromagnetic signal, power is supplied to the control module; the control module obtains the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sends the power supply state to the NFC chip so that the NFC chip sends out a prompt. Optionally, the NFC power supply detecting device further includes a current consumption module, where the current consumption module is connected to the control module; and when the control module controls the current consumption module to start working, detecting the change voltage value of the power supply voltage, and judging the power supply state of the NFC antenna module according to the change voltage value of the power supply voltage and a preset voltage value. Optionally, the current consumption module includes a load resistor, one end of the load resistor is connected to the output end of the control module, and the other end of the load resistor is grounded. Optionally, the NFC antenna module comprises an NFC antenna and a voltage conversion module, wherein the NFC antenna is connected with the voltage conversion module, and the voltage conversion module is connected with the control module; the NFC antenna receives electromagnetic signals and converts the electromagnetic signals into alternating current signals, and the voltage conversion module converts the alternating current signals into direct current signals and outputs the direct current signals to the control module. Optionally, the NFC antenna module comprises a first capacitor module and a second capacitor module, wherein the first capacitor module is positioned between the NFC antenna and the voltage conversion module to form a resonant circuit with the NFC antenna, and the second capacitor module is positioned between the voltage conversion module and the control module to filter the direct current signal output by the voltage conversion module. A second aspect of an embodiment of the present invention provides a detection method based on the NFC power supply detection device in the first aspect, where the detection method includes: And acquiring the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module, and sending the power supply state to the NFC chip so that the NFC chip sends out a prompt. Optionally, the acquiring the power supply state of the NFC antenna module according to the power supply voltage output by the NFC antenna module includes: when the control current consumption module starts to work, the power supply voltage is detected, and the power supply state of the NFC antenna module is judged according to the power supply voltage and a preset voltage value. Optionally, the determining the power supply state of the NFC antenna module acc