Double-frequency electronic lock

Abstract

The utility model provides a double-frequency electronic lock, which relates to the technical field of electronic locks and comprises a PCB (printed circuit board), a controller, a high-frequency card reading circuit, a low-frequency card reading circuit, a high-frequency induction coil and a low-frequency induction coil, the controller, the high-frequency card reading circuit and the low-frequency card reading circuit are arranged on the PCB, the high-frequency induction coil is arranged on a first end face of the PCB, and the low-frequency induction coil is arranged on a second end face of the PCB. The high-frequency induction coil is configured to receive a high-frequency RFID card swiping signal, the low-frequency induction coil is configured to receive a low-frequency RFID card swiping signal, the high-frequency card reading circuit is configured to read a high-frequency RFID card, the low-frequency card reading circuit is configured to read a low-frequency RFID card, and the controller is configured to periodically switch to perform high-frequency card reading or low-frequency card reading according to a preset period. According to the electronic lock, the high-frequency RFID card and the low-frequency RFID card can be subjected to mixed card swiping operation, the low-frequency card and the high-frequency card can be operated in the same RFID user card swiping area, the size of the lock is reduced, and cost for replacing system cards is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic locks, and particularly relates to a dual-frequency electronic lock. Background Art

[0002] Currently, the RFID electronic locks on the market are generally divided into two types: low-frequency (125Khz) RFID electronic locks and high-frequency (13.56Mhz) RFID electronic locks. Usually, an electronic lock only compatible with one of the low-frequency RFID cards and high-frequency RFID cards. However, in the actual use process, in some specific occasions, there is a situation where it is necessary to use both high-frequency RFID cards and low-frequency RFID cards at the same time. Carrying two RFID cards all the time is not very convenient. At this time, there is an urgent need for an electronic lock solution to integrate this usage scenario.

[0003] In view of this, this application is proposed. Summary of the Utility Model

[0004] The utility model provides a dual-frequency electronic lock, which can at least partially improve the above problems.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A dual-frequency electronic lock includes: a PCB board, a controller disposed on the PCB board, a high-frequency card reading circuit and a low-frequency card reading circuit, a high-frequency induction coil disposed on the first end face of the PCB board, and a low-frequency induction coil disposed on the second end face of the PCB board. The input end of the controller is electrically connected to the high-frequency induction coil and the low-frequency induction coil, and the output end of the controller is electrically connected to the high-frequency card reading circuit and the low-frequency card reading circuit;

[0007] Wherein, the high-frequency induction coil is configured to receive the high-frequency RFID card swiping signal, the low-frequency induction coil is configured to receive the low-frequency RFID card swiping signal, the high-frequency card reading circuit is configured to read the high-frequency RFID card, the low-frequency card reading circuit is configured to read the low-frequency RFID card, and the controller is configured to periodically switch to perform high-frequency card reading or low-frequency card reading according to a preset period.

[0008] Preferably, the high-frequency card reading circuit includes an RFID chip and a high-frequency radio frequency circuit. Among them, the RFID chip is electrically connected to the high-frequency radio frequency circuit, the RFID chip is electrically connected to the controller, and the RFID chip is electrically connected to the high-frequency induction coil.

[0009] Preferably, the RFID chip adopts a WS1850S model chip.

[0010] Preferably, the high-frequency card reading circuit is a 13.56Mhz card reading circuit.

[0011] Preferably, the low-frequency card reading circuit is a 125Khz card reading circuit. The control end of the low-frequency card reading circuit is electrically connected to the controller. The CHECK_ID end of the low-frequency card reading circuit is configured to receive a low-level signal. When the controller enters the low-frequency card reading program, the control end of the low-frequency card reading circuit receives 6 pulse signals of 125KHz periodically sent by the controller.

[0012] Preferably, it further includes a warning indicator light. The input end of the warning indicator light is electrically connected to the output end of the controller.

[0013] Preferably, it further includes a warning buzzer. The input end of the warning buzzer is electrically connected to the output end of the controller.

[0014] In summary, the dual-frequency electronic lock includes a PCB board, a controller configured on the PCB board, a high-frequency card reading circuit and a low-frequency card reading circuit, a high-frequency induction coil configured on the first end face of the PCB board, and a low-frequency induction coil configured on the second end face of the PCB board. The high-frequency induction coil is configured to receive a high-frequency RFID card swiping signal, the low-frequency induction coil is configured to receive a low-frequency RFID card swiping signal, the high-frequency card reading circuit is configured to read a high-frequency RFID card, the low-frequency card reading circuit is configured to read a low-frequency RFID card, and the controller is configured to periodically switch to perform high-frequency card reading or low-frequency card reading according to a preset period. The present invention provides an electronic lock capable of mixed swiping operations for high-frequency and low-frequency RFID cards. In the same RFID user swiping area, both low-frequency cards and high-frequency cards can be operated, reducing the volume of the lock and saving the cost of replacing system cards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the dual-frequency electronic lock provided by an embodiment of the present invention;

[0016] Figure 2 is a schematic circuit diagram of the high-frequency card reading circuit provided by an embodiment of the present invention;

[0017] Figure 3 is a schematic circuit diagram of the low-frequency card reading circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] The following will give a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.

[0020] Please refer to Figure 1 , the first embodiment of the present utility model provides a dual-frequency electronic lock, including: a PCB board, a controller configured on the PCB board, a high-frequency card reading circuit and a low-frequency card reading circuit, as well as a high-frequency induction coil configured on the first end face of the PCB board and a low-frequency induction coil configured on the second end face of the PCB board. The input end of the controller is electrically connected to the high-frequency induction coil and the low-frequency induction coil, and the output end of the controller is electrically connected to the high-frequency card reading circuit and the low-frequency card reading circuit;

[0021] Among them, the high-frequency induction coil is configured to receive the card swiping signal of the high-frequency RFID card, the low-frequency induction coil is configured to receive the card swiping signal of the low-frequency RFID card, the high-frequency card reading circuit is configured to read the high-frequency RFID card, the low-frequency card reading circuit is configured to read the low-frequency RFID card, and the controller is configured to periodically switch to perform high-frequency card reading or low-frequency card reading according to a preset period.

[0022] Specifically, in this embodiment, the dual-frequency electronic lock is mainly composed of a low-frequency radio frequency circuit and a high-frequency radio frequency circuit. The two parts of the circuit are relatively independent. When a card approaches the card swiping induction area, one circuit is first started to read the card. If the card reading fails, another circuit is started to read the card, that is, only one circuit is performing the card reading operation at the same time.

[0023] Please refer to Figures 2 to 3 , preferably, the high-frequency card reading circuit includes an RFID chip and a high-frequency radio frequency circuit. Among them, the RFID chip is electrically connected to the high-frequency radio frequency circuit, the RFID chip is electrically connected to the controller, and the RFID chip is electrically connected to the high-frequency induction coil.

[0024] Preferably, the RFID chip uses a WS1850S model chip.

[0025] Preferably, the high-frequency card reading circuit is a 13.56Mhz card reading circuit.

[0026] Preferably, the low-frequency card reading circuit is a 125Khz card reading circuit. The control end of the low-frequency card reading circuit is electrically connected to the controller. The CHECK_ID end of the low-frequency card reading circuit is configured to receive a low-level signal. When the controller enters the low-frequency card reading program, the control end of the low-frequency card reading circuit receives 6 125KHz pulse signals periodically sent by the controller.

[0027] Specifically, in this embodiment, the dual-frequency electronic lock is a low-power card-swipe electronic lock that can identify 125Khz ID cards and 13.56Mhz IC cards in the same induction area. Its structure mainly includes a top-layer 125Khz antenna, a PCB, and a bottom-layer PCB antenna.

[0028] In this embodiment, the controller sets a periodic low-power card detection (LPCD) mode for the RFID chip (1850WS). When an IRQ interruption occurs when the high-frequency antenna has a load, the controller starts the high-frequency card reading function. When the card reading fails, the low-frequency card reading is started. The controller periodically inputs 6 125KHz pulse signals to the PWM125KHZ end of the low-frequency card reading circuit. The CHECK_ID receives a low-level signal. When the antenna has no load, the duration of the low-level signal is longer than when there is a load, so as to judge whether there is a load entering. If there is a load entering, the low-frequency card reading program is started to enter the card reading. When the card reading fails, the high-frequency card reading is started.

[0029] After the card reading is successful, the actions set by the program are executed. If the card reading fails, the above steps are repeated. When there is no load on both the high-frequency and low-frequency antennas, it has been working in the low-power card search mode periodically to ensure the service life of the battery. This is also the default long-time working mode.

[0030] Preferably, it further includes a warning indicator light. The input end of the warning indicator light is electrically connected to the output end of the controller.

[0031] Preferably, it further includes a warning buzzer. The input end of the warning buzzer is electrically connected to the output end of the controller.

[0032] Specifically, in this embodiment, when the dual-frequency electronic lock malfunctions, the warning buzzer will emit an alarm sound to remind the user to check. At the same time, the warning indicator light will also be turned on to further remind the user. It should be noted that in other embodiments, warning indicator lights and warning buzzers of other types of structures can also be used, which are not specifically limited here, but these solutions are all within the protection scope of the present invention.

[0033] In summary, the dual-frequency electronic lock is composed of a low-frequency RF circuit and a high-frequency RF circuit. The two parts of the circuit are relatively independent. When a card approaches the card-sensing area, one circuit is first activated to read the card. If the card reading fails, the other circuit is then activated to read the card, that is, only one circuit is performing the card reading operation at the same time. An electronic lock that enables mixed card swiping operations for high-frequency and low-frequency RFID cards is provided. Low-frequency cards and high-frequency cards can be operated within the same RFID user card-swipping area, reducing the volume of the lock and saving the cost of replacing system cards.

[0034] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A dual-frequency electronic lock, characterized in that Including: A PCB board, a controller configured on the PCB board, a high-frequency card reading circuit and a low-frequency card reading circuit, as well as a high-frequency induction coil configured on the first end face of the PCB board and a low-frequency induction coil configured on the second end face of the PCB board. The input end of the controller is electrically connected to the high-frequency induction coil and the low-frequency induction coil, and the output end of the controller is electrically connected to the high-frequency card reading circuit and the low-frequency card reading circuit; Wherein, the high-frequency induction coil is configured to receive a high-frequency RFID card swiping signal, the low-frequency induction coil is configured to receive a low-frequency RFID card swiping signal, the high-frequency card reading circuit is configured to read a high-frequency RFID card, the low-frequency card reading circuit is configured to read a low-frequency RFID card, and the controller is configured to periodically switch to perform high-frequency card reading or low-frequency card reading according to a preset period.

2. The dual-frequency electronic lock according to claim 1, characterized in that, The high-frequency card reading circuit includes an RFID chip and a high-frequency radio frequency circuit. Among them, the RFID chip is electrically connected to the high-frequency radio frequency circuit, the RFID chip is electrically connected to the controller, and the RFID chip is electrically connected to the high-frequency induction coil.

3. The dual-frequency electronic lock according to claim 2, characterized in that, The RFID chip uses a WS1850S model chip.

4. A dual-frequency electronic lock according to claim 1, characterized in that, The high-frequency card reading circuit is a 13.56Mhz card reading circuit.

5. A dual-frequency electronic lock according to claim 1, characterized in that, The low-frequency card reading circuit is a 125Khz card reading circuit. The control end of the low-frequency card reading circuit is electrically connected to the controller. The CHECK_ID end of the low-frequency card reading circuit is configured to receive a low-level signal. Among them, when the controller enters the low-frequency card reading program, the control end of the low-frequency card reading circuit receives 6 125KHz pulse signals periodically sent by the controller.

6. A dual-frequency electronic lock according to claim 1, characterized in that, It further includes a warning indicator light, and the input end of the warning indicator light is electrically connected to the output end of the controller.

7. A dual-frequency electronic lock according to claim 1, characterized in that, It further includes a warning buzzer, and the input end of the warning buzzer is electrically connected to the output end of the controller.

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