Passive NFC authentication unlocking device and system

Abstract

The utility model relates to the technical field of passive systems, and discloses a passive NFC (Near Field Communication) authentication unlocking device and a passive NFC authentication unlocking system, which comprise an antenna module, an energy conversion module, a boosting module, an authentication module, a control module and a driving module, the energy conversion module converts electromagnetic wave energy in the NFC signal into direct current electric energy, the boosting module boosts the direct current electric energy to a working voltage for the system to work, the authentication module is used for receiving and comparing the NFC signal to generate an authentication signal, the control module generates a control signal according to the authentication signal, and the driving module drives the peripheral to execute an unlocking action according to the control signal. According to the utility model, the dependence of an electric control lock on an external battery or a power supply is eliminated, the accurate unlocking operation is realized, and the cost and the power loss are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of passive systems, and more specifically, to a passive NFC authentication and unlocking device and system. Background Art

[0002] With the increasing demand for low-cost, environmentally friendly, convenient, and miniaturized designs in products such as electronic locks, storage devices, and electronic access control systems, the related control systems are also moving towards modularity, low power consumption, battery durability, and affordable prices. As the core component of these devices, the electronic control system is typically the most power-hungry, cost-intensive, innovative, and highly dependent. However, while traditional battery-powered systems and active NFC reader chips can meet these basic requirements, they present limitations in terms of performance, cost, environmental friendliness, and security.

[0003] Specifically, traditional systems typically require a constant power supply, using dry-cell or rechargeable batteries. This not only increases product costs but also places high demands on battery capacity and quality. In the door lock industry in particular, industry standards for many products require dry-cell batteries to have a standby life of eight months or more, making them consumables and leading to additional costs and environmental concerns. Furthermore, traditional active chip-based card reader authentication and unlocking methods consume high power and are costly. Users must carry their cards at all times, and if lost, they must re-issue them, significantly impacting ease of use. Utility Model Content

[0004] The utility model provides a passive NFC authentication and unlocking device and system to overcome the defects of existing electric control locks such as high power consumption and high cost.

[0005] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0006] In a first aspect, the present invention provides a passive NFC authentication and unlocking device, comprising:

[0007] Antenna module, used to receive NFC signals from external devices.

[0008] The energy conversion module is used to convert the electromagnetic wave energy in the received NFC signal into direct current energy.

[0009] The boost module is used to boost the DC power to an operating voltage for the authentication module and the control module to operate.

[0010] The authentication module is used to receive the NFC signal sent by the external device and perform authentication comparison to generate an authentication signal.

[0011] The control module is used to generate a control signal according to the authentication signal.

[0012] The driving module is used to drive the peripheral device to perform an unlocking action according to the control signal.

[0013] As a preferred technical solution, the energy conversion module includes an antenna matching network unit, a rectifier circuit unit, a decoupling filter unit and an output unit.

[0014] The antenna matching network unit is used to receive an NFC signal from an external device and transfer the electromagnetic wave energy in the NFC signal to the rectifier circuit unit through the impedance matching network.

[0015] The rectifier circuit unit is used to rectify the electromagnetic wave energy transmitted by the antenna matching network unit into direct current power.

[0016] The decoupling filter unit is used to filter out high-frequency noise in the direct current power output by the rectifier circuit unit.

[0017] The output unit is used to output the DC power processed by the decoupling filter unit to the boost module.

[0018] As a preferred technical solution, the energy conversion module includes: a power receiving antenna, a resistor R15, a resistor R17, a resistor R28, a resistor R29, a resistor R43, a resistor R44, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a capacitor C36, a capacitor C41, a capacitor C42, a capacitor C44, a capacitor C45, a capacitor C46, ​​a capacitor C47, C53, an inductor L1, an inductor L3, an RXP port, a RXN port, a TX1 port and a TX2.

[0019] One end of the power receiving antenna is connected to the resistor R15 and the resistor R28 , and the other end is connected to the resistor R29 and the resistor R17 .

[0020] One end of the resistor R15 and the resistor R28 is connected to the power receiving antenna, and the other end thereof is connected to the capacitor C36 , the resistor R43 , the capacitor C31 , the capacitor C32 , and the capacitor C54 .

[0021] One end of the capacitor C36 and the capacitor C54 is connected to the resistor R15 , the resistor R28 , the resistor R43 , the capacitor C31 , and the capacitor C32 , and the other end thereof is grounded.

[0022] One end of the resistor R43 is connected to the resistor R15 , the resistor R28 , the capacitor C36 , the capacitor C31 , the capacitor C32 , and the capacitor C54 , and the other end is connected to the capacitor C30 .

[0023] One end of the capacitor C30 is connected to the resistor R43 , and the other end is connected to the RXP port.

[0024] One end of the capacitor C31 and the capacitor C32 are connected to the resistor R15 , the resistor R28 , the resistor R43 , the capacitor C36 , and the capacitor C54 , and the other end thereof are connected to the capacitor C34 , the capacitor C33 , and the inductor L1 .

[0025] One end of the capacitor C33 and the capacitor C34 is connected to the capacitor C31 , the capacitor C32 and the inductor L1 , and the other end is grounded.

[0026] One end of the inductor L1 is connected to C31 , capacitor C32 , capacitor C33 , and capacitor C34 , and the other end is connected to the TX2 port.

[0027] One end of the resistor R29 and the resistor R17 is connected to the power receiving antenna, and the other ends thereof are connected to the capacitor C44 , the resistor R44 , the capacitor C45 , the capacitor C46 , and the capacitor C53 .

[0028] One end of the capacitor C44 and the capacitor C53 is connected to the resistor R29, the resistor R17, the resistor R44, the capacitor C45, and the capacitor C46, ​​and the other end is grounded.

[0029] One end of the capacitor C45 and the capacitor C46 are connected to the capacitor C44, the capacitor C53, the resistor R29, the resistor R17, and the resistor R44, and the other end thereof are connected to the capacitor C41, the capacitor C42, and the inductor L3.

[0030] One end of the capacitor C41 and the capacitor C42 is connected to the capacitor C45 , the capacitor C46 , and the inductor L3 , and the other end is grounded.

[0031] One end of the inductor L3 is connected to the capacitors C41 , C42 , C45 , and C46 , and the other end is connected to the TX1 port.

[0032] One end of the resistor R44 is connected to the resistor R29 , the resistor R17 , the capacitor C44 , the capacitor C45 , the capacitor C46 , and the capacitor C53 , and the other end is connected to the capacitor C47 .

[0033] One end of the capacitor C47 is connected to the resistor R44, and the other end is connected to the RXN port.

[0034] As a preferred technical solution, the antenna module is an NFC antenna.

[0035] As a preferred technical solution, the authentication module further includes a storage unit, which is used to store preset authentication information and compare the authentication information with the ID information in the received NFC signal to generate an authentication signal.

[0036] As a preferred technical solution, the NFC protocol standards adopted by the authentication module include at least one or more of ISO14443A / B, ISO15693 or FELICA.

[0037] As a preferred technical solution, the control module is a microcontroller.

[0038] As a preferred technical solution, the driving module further includes a delay unit, which is configured to execute an unlocking action according to a preset delay time after receiving a control signal.

[0039] As a preferred technical solution, the charge pump module includes capacitor C17, capacitor C18, capacitor C19, capacitor C20, resistor R5, DC-DC converter device U4, VPH_PWR port and PVDD_NFC port.

[0040] One end of the capacitor C17 and the capacitor C18 is connected to the VPH_PWR port, the resistor R5 and the input voltage terminal VIN pin of the DC-DC converter device U4, and the other end is grounded.

[0041] One end of the resistor R5 is connected to the VPH_PWR port, the capacitor C17 , the capacitor C18 , and the input voltage terminal VIN pin of the DC-DC converter device U4 , and the other end is connected to the enable terminal EN pin of the DC-DC converter device U4 .

[0042] One end of the capacitor C19 and the capacitor C20 is connected to the PVDD_NFC port and the output voltage terminal VOUT pin of the DC-DC converter device U4, and the other end is grounded.

[0043] In a second aspect, the present invention further provides a passive NFC authentication and unlocking system, comprising: a mobile terminal and a passive NFC authentication and unlocking device as described in any of the solutions of the first aspect. The mobile terminal is configured to transmit an NFC signal, and the passive NFC authentication and unlocking device receives the transmitted NFC signal when in proximity to the mobile terminal.

[0044] Compared with the existing technology, the beneficial effects of the technical solution of the present invention include: the present invention first receives the NFC signal of the external device through the antenna module and converts the electromagnetic wave energy in the signal into DC power through the energy conversion module, providing the required power for the entire system, eliminating the dependence on external batteries or power supplies, thereby significantly reducing maintenance costs. Secondly, the boost module increases the low-voltage DC power to the operating voltage, ensuring the stable operation of the authentication module and the control module, and enabling the system to operate efficiently even in a passive power supply state. Finally, the authentication module verifies the identity by comparing the NFC signal of the external device and generates an authentication signal. The control module generates a control signal based on the authentication result to drive the peripheral device to perform the unlocking action, thereby achieving a precise unlocking operation and reducing power loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1This is a structural diagram of the passive NFC authentication and unlocking device provided by an embodiment of the utility model.

[0046] Figure 2 This is a circuit diagram of the energy conversion module provided in an embodiment of the present utility model.

[0047] Figure 3 This is a circuit diagram of the boost module provided in an embodiment of the present utility model.

[0048] Figure 4 This is a circuit diagram of the authentication module provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0049] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of devices and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0050] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. As used in this utility model and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0051] It should be understood that the words "first", "second" and similar words used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise indicated, words such as "front", "rear", "lower" and / or "upper" are for ease of description only and are not limited to a position or a spatial orientation. Words such as "include" or "comprising" mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0053] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0054] The technical solution of the present utility model is further described below with reference to the accompanying drawings and embodiments.

[0055] Example 1

[0056] See Figure 1 The embodiment of the present utility model provides a passive NFC authentication and unlocking device, including: an antenna module, an energy conversion module, a boost module, an authentication module, a control module and a driving module.

[0057] In specific implementations, when an external handheld device transmits a 13.56 MHz NFC electromagnetic wave signal, the antenna module first receives the NFC electromagnetic wave signal radiated from the external device. To ensure efficient signal reception, the antenna center frequency is tuned to 13.56 MHz, and a matching network is used to optimize signal transmission and minimize signal loss. This allows the device to fully utilize the energy emitted by the external device for subsequent energy conversion.

[0058] After receiving the current, the energy conversion module uses the principle of electromagnetic induction to convert the received electromagnetic wave energy into DC power. This process does not rely on traditional batteries or external power sources, but is powered by the energy provided by the NFC signal itself. The energy conversion module uses a highly efficient circuit to convert the wireless electromagnetic signal into stable DC power, ensuring the power required for subsequent device operation.

[0059] The converted DC power has a low voltage, which the boost module then boosts to the target operating voltage. This voltage is regulated and stabilized, supplying the authentication, control, and drive modules to ensure proper operation. The boost module effectively ensures stable power supply to the entire device even without an external power source, and ensures efficient energy conversion.

[0060] Once the power supply is stable, the authentication module activates and receives the NFC signal from the external device. The module decodes the identity information in the signal and compares it with the preset identity information stored in the device. If the comparison results in a match, the authentication module generates an authentication success signal. If the comparison fails, the device will not proceed further.

[0061] The authentication module transmits the comparison results to the control module, which generates a corresponding control signal based on the authentication signal. If authentication is successful, the control module sends an unlock command. If authentication fails, the control module does not initiate the unlock process, ensuring security.

[0062] Finally, the driver module receives the control signal from the control module and drives the peripheral device to perform the unlocking action. The driver module activates the electromagnetic drive unit according to the control signal, completing the unlocking operation, opening the door lock or other device, and completing the entire authentication and unlocking process.

[0063] Throughout the entire process, the device ensures low-power consumption and high-efficiency operation through passive power supply and efficient energy conversion and boosting mechanisms, and ensures the security and accuracy of the unlocking process through the close cooperation of the authentication module and the control module.

[0064] As can be understood, the passive NFC authentication and unlocking device of the present invention combines an antenna module, an energy conversion module, a boost module, an authentication module, a control module, and a driver module to form a highly efficient, low-power overall system. First, the antenna module receives the NFC signal from an external device and, through the energy conversion module, converts the electromagnetic wave energy in the signal into DC power, providing the required power for the entire system. This eliminates reliance on external batteries or power supplies, significantly reducing maintenance costs and environmental pollution. Energy collection efficiency is further improved, as the energy conversion module utilizes a highly efficient circuit design, reducing power loss. Second, the boost module boosts the low-voltage DC power to an operating voltage, ensuring stable operation of the authentication and control modules and enabling efficient system operation even in a passively powered state. Finally, the authentication module verifies the identity of the external device by comparing the NFC signal and generates an authentication signal. Based on the authentication result, the control module generates a control signal to drive the peripheral device to perform the unlocking action, thus achieving precise unlocking. Therefore, the present invention not only mitigates the limitations of traditional battery-powered devices but also improves the overall efficiency, convenience, and security of the system.

[0065] Example 2

[0066] This embodiment makes improvements based on the passive NFC authentication and unlocking device proposed in Example 1.

[0067] In this embodiment, the energy conversion module includes an antenna matching network unit, a rectifier circuit unit, a decoupling filter unit and an output unit.

[0068] The antenna matching network unit is used to receive NFC signals from external devices and transfer the electromagnetic wave energy in the NFC signals to the rectifier circuit unit via the impedance matching network. The rectifier circuit unit is used to rectify the electromagnetic wave energy transmitted by the antenna matching network unit into DC power. The decoupling filter unit is used to filter out high-frequency noise in the DC power output by the rectifier circuit unit. The output unit is used to output the DC power processed by the decoupling filter unit to the boost module.

[0069] In this embodiment, the energy conversion module includes: a power receiving antenna, a resistor R15, a resistor R17, a resistor R28, a resistor R29, a resistor R43, a resistor R44, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a capacitor C36, a capacitor C41, a capacitor C42, a capacitor C44, a capacitor C45, a capacitor C46, ​​a capacitor C47, C53, an inductor L1, an inductor L3, an RXP port, a RXN port, a TX1 port and a TX2 port.

[0070] One end of the power receiving antenna is connected to the resistor R15 and the resistor R28 , and the other end is connected to the resistor R29 and the resistor R17 .

[0071] One end of the resistor R15 and the resistor R28 is connected to the power receiving antenna, and the other end thereof is connected to the capacitor C36 , the resistor R43 , the capacitor C31 , the capacitor C32 , and the capacitor C54 .

[0072] One end of the capacitor C36 and the capacitor C54 is connected to the resistor R15 , the resistor R28 , the resistor R43 , the capacitor C31 , and the capacitor C32 , and the other end thereof is grounded.

[0073] One end of the resistor R43 is connected to the resistor R15 , the resistor R28 , the capacitor C36 , the capacitor C31 , the capacitor C32 , and the capacitor C54 , and the other end is connected to the capacitor C30 .

[0074] One end of the capacitor C30 is connected to the resistor R43 , and the other end is connected to the RXP port.

[0075] One end of the capacitor C31 and the capacitor C32 are connected to the resistor R15 , the resistor R28 , the resistor R43 , the capacitor C36 , and the capacitor C54 , and the other end thereof are connected to the capacitor C34 , the capacitor C33 , and the inductor L1 .

[0076] One end of the capacitor C33 and the capacitor C34 is connected to the capacitor C31 , the capacitor C32 and the inductor L1 , and the other end is grounded.

[0077] One end of the inductor L1 is connected to C31 , capacitor C32 , capacitor C33 , and capacitor C34 , and the other end is connected to the TX2 port.

[0078] One end of the resistor R29 and the resistor R17 is connected to the power receiving antenna, and the other ends thereof are connected to the capacitor C44 , the resistor R44 , the capacitor C45 , the capacitor C46 , and the capacitor C53 .

[0079] One end of the capacitor C44 and the capacitor C53 is connected to the resistor R29, the resistor R17, the resistor R44, the capacitor C45, and the capacitor C46, ​​and the other end is grounded.

[0080] One end of the capacitor C45 and the capacitor C46 are connected to the capacitor C44, the capacitor C53, the resistor R29, the resistor R17, and the resistor R44, and the other end thereof are connected to the capacitor C41, the capacitor C42, and the inductor L3.

[0081] One end of the capacitor C41 and the capacitor C42 is connected to the capacitor C45 , the capacitor C46 , and the inductor L3 , and the other end is grounded.

[0082] One end of the inductor L3 is connected to the capacitors C41 , C42 , C45 , and C46 , and the other end is connected to the TX1 port.

[0083] One end of the resistor R44 is connected to the resistor R29 , the resistor R17 , the capacitor C44 , the capacitor C45 , the capacitor C46 , and the capacitor C53 , and the other end is connected to the capacitor C47 .

[0084] One end of the capacitor C47 is connected to the resistor R44, and the other end is connected to the RXN port.

[0085] like Figure 2 As shown, the passive NFC authentication and unlocking device of this invention utilizes a highly efficient energy harvesting and rectification circuit design to receive and convert electrical energy from an external NFC device, achieving battery-free power. The design of the entire energy harvesting unit, starting with the antenna module, utilizes a network of high-Q, low-loss components (such as inductors L1 and L3 and capacitors C30, C31, and C45) to minimize signal loss during 13.56MHz NFC signal transmission. Specifically, when a handheld device (such as an NFC-enabled mobile phone or walkie-talkie) is brought close to the system's antenna, the device's NFC module begins emitting a near-field electromagnetic wave signal at a frequency of 13.56MHz. This signal is captured by the system's antenna and transmitted to subsequent circuits via a matching network. Resistors R15 and R17, along with high-Q capacitors C31 and C45, work together through filtering and matching to maximize signal energy conversion efficiency while minimizing power losses within the circuit itself.

[0086] After passing through high-Q inductors (L1 and L3) and matching capacitors, the signal is transmitted to the rectifier circuit, which converts AC power into DC. The rectifier circuit uses low-loss components (such as NPO and COG capacitors) to improve energy harvesting efficiency, ensuring that the system module can still obtain a stable power supply from the external NFC signal even without a battery. This design not only improves the system's energy conversion efficiency but also provides sufficient DC power for the subsequent boost and control modules, making the entire passive NFC authentication and unlocking process efficient, stable, and low-power.

[0087] In this embodiment, the control module is a microcontroller.

[0088] In this embodiment, the driving module further includes a delay unit, and the delay unit is configured to perform an unlocking action according to a preset delay time after receiving a control signal.

[0089] In this embodiment, the charge pump module includes a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a resistor R5, a DC-DC converter device U4, a VPH_PWR port, and a PVDD_NFC port.

[0090] One end of the capacitor C17 and the capacitor C18 is connected to the VPH_PWR port, the resistor R5 and the input voltage terminal VIN pin of the DC-DC converter device U4, and the other end is grounded.

[0091] One end of the resistor R5 is connected to the VPH_PWR port, the capacitor C17 , the capacitor C18 , and the input voltage terminal VIN pin of the DC-DC converter device U4 , and the other end is connected to the enable terminal EN pin of the DC-DC converter device U4 .

[0092] One end of the capacitor C19 and the capacitor C20 is connected to the PVDD_NFC port and the output voltage terminal VOUT pin of the DC-DC converter device U4, and the other end is grounded.

[0093] like Figure 3 As shown, the passive NFC authentication and unlocking device of this invention uses a charge pump unit to provide a stable voltage after rectification, powering the subsequent NFC unlocking authentication and peripheral driver modules. The core component in the figure is the charge pump IC (model AW3703D0180STR), which boosts the input voltage (VPH_PWR) and outputs it stably to the PVDD_NFC terminal, providing the required stable power for the system's subsequent circuits.

[0094] Specifically, the rectified DC current is input to the VIN terminal of the charge pump IC via the VPH_PWR terminal. Through the internal boost converter, the output terminal VOUT generates a stable PVDD_NFC voltage, providing reliable power for the NFC module and unlock driver module. Capacitors C17, C18, C19, and C20 in the figure are all high-Q, low-leakage capacitors, used for input and output filtering and voltage stabilization, respectively. These capacitors not only smooth voltage fluctuations but also reduce power supply noise, ensuring the purity and stability of the output voltage.

[0095] Furthermore, the PVDD_NFC port, combined with a large energy storage capacitor of appropriate capacitance, allows the system to maintain stable power output even when the power supply is unstable, thus ensuring smooth NFC unlocking and authentication processes without passive power. This design, through the boosting effect of the charge pump and the support of the energy storage capacitor, achieves a long stable power supply period, ensuring system reliability and efficiency.

[0096] In this embodiment, the antenna module is an NFC antenna.

[0097] In this embodiment, the authentication module further includes a storage unit, which is used to store preset authentication information and compare the authentication information with the ID information in the received NFC signal to generate an authentication signal.

[0098] In this embodiment, the NFC protocol standard adopted by the authentication module includes at least one or more of ISO14443A / B, ISO15693 or FELICA.

[0099] like Figure 4 As shown, the high-efficiency NFC protocol unit of this utility model has a complex structure and comprehensive functions. It is mainly responsible for identity information authentication, output of control signals, and management of peripheral driver power. The unit includes multiple interfaces and circuit connections and supports multiple NFC protocol standards such as ISO14443A / B, ISO15693, and FELICA to ensure system compatibility and a wide range of applications.

[0100] During operation, the NFC protocol unit receives the ID information transmitted by a handheld device (such as an NFC-enabled mobile phone) and compares it with the internally stored ID information to complete the identity verification. If the comparison results match, the unit outputs a successful authentication signal and transmits a control signal to the subsequent control unit to trigger the unlocking operation. At the same time, the NFC protocol unit is responsible for managing the power supply to the peripherals, ensuring stable driving power support while outputting authentication and control signals.

[0101] also, Figure 4It includes multiple high-Q capacitors and filtering circuits (such as C15, C16, and C17) for voltage regulation and noise filtering, ensuring stable operation of the NFC protocol unit. Oscillator circuits (such as OSC_IN and OSC_OUT) provide the system with a clock signal to ensure synchronization of data transmission and processing. This highly integrated circuit design enables efficient multi-protocol support, fast authentication, and stable power supply, making the entire passive NFC unlocking system responsive, secure, and reliable.

[0102] Example 3

[0103] This embodiment also provides a passive NFC authentication and unlocking system, comprising: a mobile terminal and the passive NFC authentication and unlocking device as described in the above embodiment. The mobile terminal is configured to transmit an NFC signal, and the passive NFC authentication and unlocking device receives the transmitted NFC signal when in proximity to the mobile terminal.

[0104] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0106] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0107] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0108] Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above-mentioned embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0109] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A passive NFC authentication and unlocking device, characterized in that: include: Antenna module, used to receive NFC signals from external devices; An energy conversion module, used to convert the electromagnetic wave energy in the received NFC signal into direct current power; A boost module, used to boost the DC power to an operating voltage for the authentication module and the control module to operate; The authentication module is used to receive the NFC signal sent by the external device and perform authentication comparison to generate an authentication signal; A control module, configured to generate a control signal according to the authentication signal; The driving module is used to drive the peripheral device to perform an unlocking action according to the control signal.

2. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The energy conversion module includes an antenna matching network unit, a rectifier circuit unit, a decoupling filter unit and an output unit; The antenna matching network unit is used to receive an NFC signal from an external device and transfer the electromagnetic wave energy in the NFC signal to the rectifier circuit unit through the impedance matching network; The rectifier circuit unit is used to rectify the electromagnetic wave energy transmitted by the antenna matching network unit into direct current power; The decoupling filter unit is used to filter out high-frequency noise in the DC power output by the rectifier circuit unit; The output unit is used to output the DC power processed by the decoupling filter unit to the boost module.

3. The passive NFC authentication and unlocking device according to claim 1 or 2, characterized in that: The energy conversion module includes: a power receiving antenna, a resistor R15, a resistor R17, a resistor R28, a resistor R29, a resistor R43, a resistor R44, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a capacitor C36, a capacitor C41, a capacitor C42, a capacitor C44, a capacitor C45, a capacitor C46, ​​a capacitor C47, C53, an inductor L1, an inductor L3, an RXP port, a RXN port, a TX1 port and a TX2 port; One end of the power receiving antenna is connected to resistor R15 and resistor R28, and the other end is connected to resistor R29 and resistor R17; One end of resistor R15 and resistor R28 is connected to the power receiving antenna, and the other end is connected to capacitor C36, resistor R43, capacitor C31, capacitor C32 and capacitor C54; One end of capacitor C36 and capacitor C54 is connected to resistor R15, resistor R28, resistor R43, capacitor C31, and capacitor C32, and the other end is grounded; One end of the resistor R43 is connected to the resistor R15, the resistor R28, the capacitor C36, the capacitor C31, the capacitor C32 and the capacitor C54, and the other end is connected to the capacitor C30; One end of capacitor C30 is connected to resistor R43, and the other end is connected to RXP port; One end of capacitor C31 and capacitor C32 is connected to resistor R15, resistor R28, resistor R43, capacitor C36 and capacitor C54, and the other end is connected to capacitor C34, capacitor C33 and inductor L1; One end of the capacitor C33 and the capacitor C34 are connected to the capacitor C31, the capacitor C32 and the inductor L1, and the other end is grounded; One end of the inductor L1 is connected to C31, capacitors C32, C33, and C34, and the other end is connected to the TX2 port; One end of the resistor R29 and the resistor R17 are connected to the power receiving antenna, and the other ends are connected to the capacitor C44, the resistor R44, the capacitor C45, the capacitor C46, ​​and the capacitor C53; One end of the capacitor C44 and the capacitor C53 is connected to the resistor R29, the resistor R17, the resistor R44, the capacitor C45 and the capacitor C46, ​​and the other end is grounded; One end of capacitor C45 and capacitor C46 is connected to capacitor C44, capacitor C53, resistor R29, resistor R17 and resistor R44, and the other end is connected to capacitor C41, capacitor C42 and inductor L3; One end of the capacitor C41 and the capacitor C42 are connected to the capacitor C45, the capacitor C46 and the inductor L3, and the other end is grounded; One end of the inductor L3 is connected to the capacitors C41, C42, C45, and C46, ​​and the other end is connected to the TX1 port; One end of the resistor R44 is connected to the resistor R29, the resistor R17, the capacitor C44, the capacitor C45, the capacitor C46 and the capacitor C53, and the other end is connected to the capacitor C47; One end of the capacitor C47 is connected to the resistor R44, and the other end is connected to the RXN port.

4. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The antenna module is an NFC antenna.

5. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The authentication module further includes a storage unit, which is used to store preset authentication information and compare the authentication information with the ID information in the received NFC signal to generate an authentication signal.

6. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The NFC protocol standard adopted by the authentication module includes at least one or more of ISO14443A / B, ISO15693 or FELICA.

7. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The control module is a microcontroller.

8. The passive NFC authentication and unlocking device according to claim 1, characterized in that: The driving module further includes a delay unit, which is configured to execute an unlocking action according to a preset delay time after receiving a control signal.

9. The passive NFC authentication and unlocking device according to claim 1, characterized in that: Also included is a charge pump module, the charge pump module including capacitor C17, capacitor C18, capacitor C19, capacitor C20, resistor R5, DC-DC converter device U4, VPH_PWR port and PVDD_NFC port; One end of capacitor C17 and capacitor C18 is connected to the VPH_PWR port, resistor R5 and the input voltage terminal VIN pin of the DC-DC converter device U4, and the other end is grounded; One end of the resistor R5 is connected to the VPH_PWR port, the capacitor C17, the capacitor C18 and the input voltage terminal VIN pin of the DC-DC converter device U4, and the other end is connected to the enable terminal EN pin of the DC-DC converter device U4; One end of the capacitor C19 and the capacitor C20 is connected to the PVDD_NFC port and the output voltage terminal VOUT pin of the DC-DC converter device U4, and the other end is grounded.

10. A passive NFC authentication and unlocking system, characterized in that: include: A mobile terminal and a passive NFC authentication and unlocking device according to any one of claims 1 to 9; The mobile terminal is used to transmit an NFC signal, and the passive NFC authentication and unlocking device receives the transmitted NFC signal when it is close to the mobile terminal.

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