Remote access controller

Abstract

The utility model discloses a remote access controller, which belongs to the technical field of access locks and comprises an MCU (microprogrammed control unit), a communication module, an isolation input module, an isolation output module and an SIM (subscriber identity module) card seat. The MCU is in communication connection with the communication module through a Uart level conversion module; the MCU is electrically connected with the input end of the access control lock through an isolation output module, and a feedback signal port of the access control lock is electrically connected with the MCU through an isolation input module; the remote data receiving port group of the communication module is electrically connected with the SIM card seat, and an SIM card is arranged in the SIM card seat. The remote access controller solves the problem that an existing access controller is low in use experience.

Description

Technical Field

[0001] The utility model relates to the technical field of access control locks, and particularly relates to a remote access control controller. Background Art

[0002] The existing traditional access control methods mainly include those based on physical keys, IC / ID cards, NFC mobile phones, WiFi wireless communication, and RJ45 network port wired communication.

[0003] For the access control systems based on physical keys and IC / ID cards, users are required to carry keys or access cards with them, which brings inconvenience to users and often results in the situation of forgetting to bring keys or access cards; and when there are visitors, users cannot remotely open the door at home and need to go to the access control point to open the door for visitors. For the access control system based on NFC mobile phone communication, due to its high requirements for the performance of users' mobile phones, mobile phones with NFC functions are generally expensive, but a large part of users' mobile phones do not have NFC functions and cannot use NFC keys to open the door, so the general applicability is not high; and remote door opening still cannot be achieved. For the access control systems based on WiFi and RJ45 network port wired communication, although remote door opening can be achieved, the system has high requirements for weak current construction. It is necessary to install a router near the access control to cover WiFi, or install optical fiber network cables and routers, etc., which makes the integration of the weak current system complex and costly. Thus, when users use the existing access control controllers, the user experience is not high. Summary of the Utility Model

[0004] In order to overcome the defects existing in the prior art, the utility model provides a remote access control controller to solve the problem of low user experience when users use it.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a remote access control controller, including an MCU, a communication module, an isolation input module, an isolation output module, and a SIM card holder;

[0006] The MCU is communicatively connected to the communication module through a Uart level conversion module; the MCU is electrically connected to the input end of the access control lock through the isolation output module, and the feedback signal port of the access control lock is electrically connected to the MCU through the isolation input module;

[0007] The remote data receiving port group of the communication module is electrically connected to the SIM card holder, and a SIM card is arranged in the SIM card holder.

[0008] Preferably, the Uart level conversion module includes a resistor R21, a resistor R22, a resistor R27, a resistor R28, a resistor R29, and an NPN transistor Q6;

[0009] The signal transmission end STC8H-TX of the MCU is electrically connected to the first end of the resistor R21. The second end of the resistor R21 is respectively electrically connected to the first end of the resistor R22 and the signal receiving end ML307R-RX0 of the communication module. The second end of the resistor R22 is grounded;

[0010] The signal receiving end STC8H-RX of the MCU is electrically connected to the collector of the NPN transistor Q6. The emitter of the NPN transistor Q6 is electrically connected to the signal transmission end ML307R-TX0 of the communication module. The base of the NPN transistor Q6 is electrically connected to the first end of the resistor R27. The second end of the resistor R27 is respectively electrically connected to the enable end ML307R-VDD_ETX of the communication module and the first end of the resistor R28. The second end of the resistor R28 is electrically connected to the emitter of the NPN transistor Q6;

[0011] The collector of the NPN transistor Q6 is electrically connected to the 5V output end VCC5V of the power supply module through the resistor R29.

[0012] Optionally, the isolation input module includes an opto-isolation relay U6, a resistor R8, a resistor R10, a diode D4, and a capacitor C15;

[0013] The first input end A of the opto-isolation relay U6 is electrically connected to the negative pole of the diode D4. The positive pole of the diode D4 is electrically connected to the first end of the resistor R8. The second end of the resistor R8 is electrically connected to the 5V output end VCC5V of the power supply module;

[0014] The second input end C of the opto-isolation relay U6 is electrically connected to the feedback signal port DI-IN1 of the access control lock;

[0015] The first output end COL of the opto-isolation relay U6 is respectively electrically connected to the first end of the resistor R10, the first end of the capacitor C15, and the feedback signal input end DI-IN1-FLAG of the MCU. The second end of the resistor R10 is electrically connected to the 5V output end VCC5V of the power supply module. The second end of the capacitor C15 is grounded;

[0016] The second output end EM of the opto-isolation relay U6 is grounded.

[0017] Specifically, the isolation output module includes an opto-isolation relay U8, a resistor R4, a resistor R5, an NPN transistor Q1, and a relay RLY1;

[0018] The first input end A of the opto-isolation relay U8 is electrically connected to the first end of the resistor R4. The second end of the resistor R4 is electrically connected to the 5V output end VCC5V of the power supply module;

[0019] The second input terminal C of the optocoupler isolation relay U8 is electrically connected to the control output terminal DO-OUT1-EN of the MCU;

[0020] The first output terminal COL of the optocoupler isolation relay U8 is electrically connected to the 12V output terminal VCC12V of the power supply module; the second output terminal EM of the optocoupler isolation relay U8 is electrically connected to the base of the NPN transistor Q1 through the resistor R5;

[0021] The 12V output terminal VCC12V of the power supply module is electrically connected to the first end of the iron core of the relay RLY1, the second end of the iron core of the relay RLY1 is electrically connected to the collector of the NPN transistor Q1, and the emitter of the NPN transistor Q1 is grounded;

[0022] The two corresponding normally open contacts of the relay RLY1 are respectively electrically connected to the input terminal DO-COM1 and the input terminal DO-NO1 of the access control lock.

[0023] Preferably, it further includes a module reset module, and the module reset module includes a resistor R26, an NPN transistor Q5 and a capacitor C30;

[0024] The first end of the resistor R26 is electrically connected to the reset signal output terminal P1.2-RESET-EN of the MCU, the second end of the resistor R26 is electrically connected to the base of the NPN transistor Q5, the emitter of the NPN transistor Q5 is grounded, the collector of the NPN transistor Q5 is electrically connected to the reset signal receiving terminal ML307R-RESET of the communication module, and the collector of the NPN transistor Q5 is electrically connected to the emitter of the NPN transistor Q5 through the capacitor C30.

[0025] It should be noted that it further includes a module power-on / off module, and the module power-on / off module includes a resistor R24 and an NPN transistor Q3. The first end of the resistor R24 is electrically connected to the power-on / off signal output terminal P1.3-ON / OFF-EN of the MCU, the second end of the resistor R24 is electrically connected to the base of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, and the collector of the NPN transistor is electrically connected to the power-on / off signal receiving terminal ML307R-PWR_ON / OFF of the communication module.

[0026] The beneficial effect of the present utility model is that: in the remote access control controller, by setting a communication module and a SIM card holder, users can directly use the APP or WeChat mini-program, and use the remote terminal to control the MCU to open the access control with one key, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 System block diagram of a remote access control controller in an embodiment of the present utility model;

[0028] Figure 2 Circuit diagram of the MCU in an embodiment of the present utility model;

[0029] Figure 3 Circuit diagram of the communication module in an embodiment of the present utility model;

[0030] Figure 4 Circuit diagram of the UART level conversion module in an embodiment of the present utility model;

[0031] Figure 5 Circuit diagram of the isolation input module in an embodiment of the present utility model;

[0032] Figure 6 Circuit diagram of the isolation output module in an embodiment of the present utility model;

[0033] Figure 7 Circuit diagram of the SIM card holder and its peripheral circuit in an embodiment of the present utility model;

[0034] Figure 8 Circuit diagram of the module reset module in an embodiment of the present utility model;

[0035] Figure 9 Circuit diagram of the module power-on / off module in an embodiment of the present utility model;

[0036] Figure 10 Circuit diagram of the power supply module in an embodiment of the present utility model. Detailed implementation manners

[0037] The following further describes the detailed implementation manners of the present utility model with reference to the accompanying drawings. It should be noted here that the description of these implementation manners is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] As Figures 1-10 shown, a remote access control controller includes an MCU, a communication module, an isolation input module, an isolation output module, and a SIM card holder;

[0039] The MCU is communicatively connected to the communication module through a Uart level conversion module; the MCU is electrically connected to the input end of the access control lock through an isolation output module, and the feedback signal port of the access control lock is electrically connected to the MCU through an isolation input module;

[0040] The remote data receiving port group of the communication module is electrically connected to the SIM card holder, and a SIM card is arranged in the SIM card holder. As Figure 7 shown, in this embodiment, the remote data receiving ports of the communication module include port SIM-VCC, port SIM-RST, port SIM-CLK, and port SIM-DATA. Among them, port SIM-VCC is electrically connected to port VCC of the SIM card holder, port SIM-RST is electrically connected to port RST of the SIM card holder, port SIM-CLK is electrically connected to port CLK of the SIM card holder, and port SIM-DATA is electrically connected to port I / O of the SIM card holder.

[0041] In the remote access control controller, by setting the communication module and the SIM card holder, users can directly use the APP or WeChat mini-program, and use the remote terminal to control the MCU to open the access control with one key, thereby improving the user experience.

[0042] When using this controller, there is no need to use a mobile phone with NFC function, and users can avoid the trouble of carrying physical keys or IC / ID cards; this controller can enable users to remotely open the door or remotely authorize others to open the door at home or outside. When there are relatives and friends visiting the user's home, the user can remotely open the door for the visitor through the APP or WeChat mini-program, or remotely authorize the visitor to let the visitor open the door by themselves with the APP or WeChat mini-program within the authorized time period, avoiding the trouble of going downstairs to open the door for the visitor or the visitor not meeting when visiting; compared with WiFi and RJ45 network port wired communication, this controller only needs to connect the power cord and the access control lock control line, does not need to connect optical fiber or network cable, and does not need to have router WiFi coverage, with high applicability, and can be upgraded and installed in most existing access control systems.

[0043] In this embodiment, the model of the MCU is STC8H1K17, which is responsible for listening in real time through the communication module to the access control switch command sent by the cloud server to the controller, then outputting a signal and controlling the opening or closing of the access control lock through the isolation output module, and monitoring in real time through the isolation input module the feedback signal of the opening and closing state of the access control lock, and reporting the opening and closing state of the access control lock to the cloud in real time through the communication module. The MCU has a mechanism for reconnecting after network disconnection, a mechanism for restarting the communication module after a long time of network disconnection, and an internal hardware watchdog (which can automatically reset and restart after the program runs away and crashes). When the power failure or network disconnection situation is restored, the MCU can control the system to power on and connect to the network automatically, so as to restore the remote access control intelligent switch and achieve unattended maintenance.

[0044] The model of the communication module is ML307R. The communication module supports full-network communication such as China Mobile, China Telecom, and China Unicom, has low power consumption, and the supported frequency bands include LTE-TDD: B34 / B38 / B39 / B40 / B41, LTE-FDD: B1 / B3 / B5 / B8.

[0045] It should be noted that, as Figure 4 shown, the Uart level conversion module includes resistor R21, resistor R22, resistor R27, resistor R28, resistor R29, and NPN transistor Q6; the signal sending end STC8H-TX of the MCU is electrically connected to the first end of resistor R21, the second end of resistor R21 is respectively electrically connected to the first end of resistor R22 and the signal receiving end ML307R-RX0 of the communication module, and the second end of resistor R22 is grounded; the signal receiving end STC8H-RX of the MCU is electrically connected to the collector of NPN transistor Q6, the emitter of NPN transistor Q6 is electrically connected to the signal sending end ML307R-TX0 of the communication module, the base of NPN transistor Q6 is electrically connected to the first end of resistor R27, the second end of resistor R27 is respectively electrically connected to the enable end ML307R-VDD_ETX of the communication module and the first end of resistor R28, and the second end of resistor R28 is electrically connected to the emitter of NPN transistor Q6; the collector of NPN transistor Q6 is electrically connected to the 5V output end VCC5V of the power supply module through resistor R29. The MCU and the communication module achieve serial communication through the Uart level conversion module. By using resistor voltage division or a triode, the level conversion between the 5V of the MCU's serial port UART and the 1.8V level of the communication module's serial port is realized, avoiding damage to the communication module.

[0046] As Figure 10 shown, the power supply module uses a DC12V power input and has an anti-reverse connection function to avoid burning the internal circuit when the power cord is connected reversely during weak current construction. Then, through the DC-DC buck converter TPS562201DDCR, the DC12V power is converted into a DC3.8V / 2A power to supply power to the communication module; the LDO low-dropout regulator 78M05 chip of UMW Semiconductor is used to convert DC12V into a 5V / 1A power to supply power to the MCU and its peripheral control circuits.

[0047] Specifically, as Figure 5As shown, the isolation input module includes an opto-isolation relay U6, a resistor R8, a resistor R10, a diode D4, and a capacitor C15. The first input terminal A of the opto-isolation relay U6 is electrically connected to the negative electrode of the diode D4. The positive electrode of the diode D4 is electrically connected to the first end of the resistor R8. The second end of the resistor R8 is electrically connected to the 5V output terminal VCC5V of the power supply module. The second input terminal C of the opto-isolation relay U6 is electrically connected to the feedback signal port DI-IN1 of the access control lock. The first output terminal COL of the opto-isolation relay U6 is respectively electrically connected to the first end of the resistor R10, the first end of the capacitor C15, and the feedback signal input terminal DI-IN1-FLAG of the MCU. The second end of the resistor R10 is electrically connected to the 5V output terminal VCC5V of the power supply module. The second end of the capacitor C15 is grounded. The second output terminal EM of the opto-isolation relay U6 is grounded. The model of the opto-isolation relay U6 is EL357C, which can realize the isolation input of the switching quantity of the feedback signal of the on / off state of the access control lock, avoiding the MCU being interfered with or burned by external input signals.

[0048] Optionally, as Figure 6 As shown, the isolation output module includes an opto-isolation relay U8, a resistor R4, a resistor R5, an NPN transistor Q1, and a relay RLY1. The first input terminal A of the opto-isolation relay U8 is electrically connected to the first end of the resistor R4. The second end of the resistor R4 is electrically connected to the 5V output terminal VCC5V of the power supply module. The second input terminal C of the opto-isolation relay U8 is electrically connected to the control output terminal DO-OUT1-EN of the MCU. The first output terminal COL of the opto-isolation relay U8 is electrically connected to the 12V output terminal VCC12V of the power supply module. The second output terminal EM of the opto-isolation relay U8 is electrically connected to the base of the NPN transistor Q1 through the resistor R5. The 12V output terminal VCC12V of the power supply module is electrically connected to the first end of the iron core of the relay RLY1. The second end of the iron core of the relay RLY1 is electrically connected to the collector of the NPN transistor Q1. The emitter of the NPN transistor Q1 is grounded. The two corresponding normally open contacts of the relay RLY1 are respectively electrically connected to the input terminal DO-COM1 and the input terminal DO-NO1 of the access control lock. The model of the relay RLY1 is G5NB-1A-E-DC12, which realizes the isolation output of the access control switch control signal, avoiding the internal circuits such as the MCU being interfered with or burned by loads such as the access control lock. After the iron core of the relay is energized, the normally open contacts can be closed, so that the access control lock is energized to realize unlocking.

[0049] Preferably, as Figure 8As shown in the figure, it further includes a module reset module, and the module reset module includes a resistor R26, an NPN transistor Q5, and a capacitor C30; the first end of the resistor R26 is electrically connected to the reset signal output terminal P1.2-RESET-EN of the MCU, the second end of the resistor R26 is electrically connected to the base of the NPN transistor Q5, the emitter of the NPN transistor Q5 is grounded, the collector of the NPN transistor Q5 is electrically connected to the reset signal receiving terminal ML307R-RESET of the communication module, and the collector of the NPN transistor Q5 is electrically connected to the emitter of the NPN transistor Q5 through the capacitor C30. The MCU realizes the reset control of the communication module through the NPN transistor Q5. When the MCU detects that it cannot communicate with the server multiple times, it can output a control signal through the bit signal output terminal P1.2-RESET-EN to reset the communication module or power it off and restart it.

[0050] Specifically, as Figure 9 As shown in the figure, it further includes a module power-on / off module, and the module power-on / off module includes a resistor R24 and an NPN transistor Q3. The first end of the resistor R24 is electrically connected to the power-on / off signal output terminal P1.3-ON / OFF-EN of the MCU, the second end of the resistor R24 is electrically connected to the base of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, and the collector of the NPN transistor is electrically connected to the switch signal receiving terminal ML307R-PWR_ON / OFF of the communication module. When the communication module is powered off, a high level is formed through the power-on / off signal output terminal P1.3-ON / OFF-EN of the MCU to make the collector and emitter of the NPN transistor Q3 conduct, so that the voltage of the switch signal receiving terminal ML307R-PWR_ON / OFF of the communication module is pulled down for 2 seconds to 3.5 seconds to realize power-on; when the communication module is powered on, a high level is formed through the power-on / off signal output terminal P1.3-ON / OFF-EN of the MCU to make the collector and emitter of the NPN transistor Q3 conduct, so that the voltage of the switch signal receiving terminal ML307R-PWR_ON / OFF of the communication module is pulled down for 3.5 seconds to 4 seconds to realize power-off.

[0051] This controller has strong anti-interference ability and has a mechanism for reconnecting to the network after disconnection, a mechanism for restarting the 4G module after a long-term disconnection, and an internal hardware watchdog (which can automatically reset and restart after the program runs away and crashes). When the power-off or network-disconnection situation is restored, the controller system automatically powers on and runs, connects to the network, and restores the remote access control intelligent switch, eliminating the need for manual maintenance.

[0052] The above has described the embodiments of the present utility model in detail in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A remote access controller, characterized in that: Including MCU, communication module, isolation input module, isolation output module and SIM card holder; The MCU is communicatively connected to the communication module through a Uart level conversion module; the MCU is electrically connected to the input end of the access lock through an isolation output module, and the feedback signal port of the access lock is electrically connected to the MCU through an isolation input module; The remote data receiving port group of the communication module is electrically connected to the SIM card holder, and a SIM card is arranged in the SIM card holder.

2. A remote access controller according to claim 1, characterized in that: The Uart level conversion module includes a resistor R21, a resistor R22, a resistor R27, a resistor R28, a resistor R29 and an NPN transistor Q6; The signal transmitting end STC8H-TX of the MCU is electrically connected to the first end of the resistor R21, the second end of the resistor R21 is electrically connected to the first end of the resistor R22 and the signal receiving end ML307R-RX0 of the communication module respectively, and the second end of the resistor R22 is grounded; The signal receiving terminal STC8H-RX of the MCU is electrically connected to the collector of the NPN transistor Q6, the emitter of the NPN transistor Q6 is electrically connected to the signal sending terminal ML307R-TX0 of the communication module, the base of the NPN transistor Q6 is electrically connected to the first end of the resistor R27, the second end of the resistor R27 is electrically connected to the enable terminal ML307R-VDD_ETX of the communication module and the first end of the resistor R28, respectively, and the second end of the resistor R28 is electrically connected to the emitter of the NPN transistor Q6; The collector of the NPN transistor Q6 is electrically connected to the 5V output terminal VCC5V of the power supply module through the resistor R29.

3. A remote access controller according to claim 1, characterized in that: The isolated input module includes an optical coupling isolation relay U6, a resistor R8, a resistor R10, a diode D4 and a capacitor C15; The first input terminal A of the optical coupling isolation relay U6 is electrically connected to the cathode of the diode D4, the anode of the diode D4 is electrically connected to the first end of the resistor R8, and the second end of the resistor R8 is electrically connected to the 5V output terminal VCC5V of the power supply module; The second input terminal C of the optical coupling isolation relay U6 is electrically connected to the feedback signal port DI-IN1 of the access lock; The first output terminal COL of the optical coupling isolation relay U6 is electrically connected to the first end of the resistor R10, the first end of the capacitor C15 and the feedback signal input terminal DI-IN1-FLAG of the MCU respectively; the second end of the resistor R10 is electrically connected to the 5V output terminal VCC5V of the power supply module, and the second end of the capacitor C15 is grounded; The second output terminal EM of the optical coupling isolation relay U6 is grounded.

4. A remote access controller according to claim 1, characterized in that: The isolated output module includes an optical coupling isolation relay U8, a resistor R4, a resistor R5, an NPN transistor Q1 and a relay RLY1; The first input terminal A of the optical coupling isolation relay U8 is electrically connected to the first end of the resistor R4, and the second end of the resistor R4 is electrically connected to the 5V output terminal VCC5V of the power supply module; The second input terminal C of the optical coupling isolation relay U8 is electrically connected to the control output terminal DO-OUT1-EN of the MCU; The first output terminal COL of the optical coupling isolation relay U8 is electrically connected to the 12V output terminal VCC12V of the power supply module; the second output terminal EM of the optical coupling isolation relay U8 is electrically connected to the base of the NPN transistor Q1 through the resistor R5; The 12V output terminal VCC12V of the power supply module is electrically connected to the first end of the iron core of the relay RLY1, the second end of the iron core of the relay RLY1 is electrically connected to the collector of the NPN transistor Q1, and the emitter of the NPN transistor Q1 is grounded; The two corresponding normally open contacts of the relay RLY1 are electrically connected to the input terminal DO-COM1 and the input terminal DO-NO1 of the access lock respectively.

5. A remote access controller according to claim 1, characterized in that: Also includes a module reset module, the module reset module includes a resistor R26, an NPN transistor Q5 and a capacitor C30; The first end of the resistor R26 is electrically connected to the reset signal output terminal P1.2-RESET-EN of the MCU, the second end of the resistor R26 is electrically connected to the base of the NPN transistor Q5, the emitter of the NPN transistor Q5 is grounded, the collector of the NPN transistor Q5 is electrically connected to the reset signal receiving terminal ML307R-RESET of the communication module, and the collector of the NPN transistor Q5 is electrically connected to the emitter of the NPN transistor Q5 through the capacitor C30.

6. A remote access controller according to claim 1, characterized in that: It also includes a module power on / off module, which includes a resistor R24 ​​and an NPN transistor Q3. The first end of the resistor R24 ​​is electrically connected to the power on / off signal output terminal P1.3-ON / OFF-EN of the MCU, the second end of the resistor R24 ​​is electrically connected to the base of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, and the collector of the NPN transistor is electrically connected to the switch signal receiving terminal ML307R-PWR_ON / OFF of the communication module.

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