CN212624186U

CN212624186U - Intelligent cabinet lock system based on NB-IoT

Info

Publication number: CN212624186U
Application number: CN202021196536.2U
Authority: CN
Inventors: 张迪; 周磊
Original assignee: Jiaxinghuabing Internet Of Things Technology Co ltd; Hangzhou Dianzi University
Current assignee: Jiaxinghuabing Internet Of Things Technology Co ltd; Hangzhou Dianzi University
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-02-26
Anticipated expiration: 2030-06-24

Abstract

The utility model discloses a based on NB-IoT intelligence cabinet lock system. The intelligent lighting control system mainly comprises a single-chip microcomputer core system module, an NB-IoT core system module, a main control board power supply module, a temperature monitoring module, a lighting control module, a cabinet lock control module, a GPS positioning module and a door magnetism detection module circuit. The singlechip core system module comprises a singlechip chip peripheral circuit, an external crystal oscillator circuit, a key reset circuit, a download circuit and a serial port communication circuit; the NB-IoT core system module comprises an NB-IoT peripheral circuit, an external antenna circuit, a VBAT input end filter circuit and an external USIM card seat circuit; the cabinet lock control module comprises a working indicator lamp circuit, a 12V-to-3.3V circuit, a cabinet lock door handle state monitoring circuit and a cabinet lock door handle control circuit. The method can be used for controlling the opening and closing of the cabinet door and monitoring the state of the cabinet door in real time for abnormal reporting. Simultaneously, can acquire the GPS information of cabinet lock and provide positional information for the user to and detect the temperature of equipment in the cabinet lock, turn on lighting system automatically at night.

Description

Intelligent cabinet lock system based on NB-IoT

Technical Field

The utility model belongs to the electronic communication field, concretely relates to based on NB-IoT intelligence cabinet lock system.

Background

With the development of modern smart cities, street lamps, traffic lights, broadband and electric meters are greatly increased, and the number of control cabinets is also greatly increased. But the control cabinet lock still adopts the traditional key lock. The key lock has many inconveniences, and firstly, the situation that maintenance personnel forget to carry the key and cannot open the control cabinet easily occurs. Secondly, if one control cabinet is provided with one key, the workload of maintenance personnel is increased because a large number of keys need to be carried; if the same key is equipped for the same type of control cabinet, the control cabinet is easily opened by irrelevant personnel, and potential safety hazards exist. Meanwhile, because the distribution of the control cabinets is not concentrated, when a fault occurs, a maintainer is difficult to quickly position the fault control cabinet, and management disorder is easily caused.

Disclosure of Invention

To the not enough of prior art, the utility model designs a based on NB-IoT intelligence cabinet lock system.

An NB-IoT-based intelligent cabinet lock system comprises a main control panel and a lock control panel.

The main control board comprises a single-chip microcomputer core system module, a door magnetism detection module, a temperature monitoring module, an illumination control module, an NB-IoT core system module and a main control board power module.

The single chip microcomputer core system module comprises a single chip microcomputer chip peripheral circuit, a single chip microcomputer external crystal oscillator circuit, a single chip microcomputer key reset circuit, a single chip microcomputer download circuit and a single chip microcomputer serial port communication circuit.

The peripheral circuit of the singlechip chip comprises a singlechip chip U1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a wiring base P1. One end of each of the fourth, fifth and sixth capacitors C4, C5 and C6 is connected to a positive 3.3V power supply, the other end of the fourth capacitor C4 is connected with the 23 rd pin of the chip U1, the other end of the fifth capacitor C5 is connected with the 35 th pin of the chip U1, and the other end of the sixth capacitor C6 is connected with the 47 th pin of the chip U1;

pins

8, 20, 23, 35, 44 and 47 of the chip U1 are connected to GND, and

pins

9, 24, 36 and 48 are connected to a positive 3.3V power supply. The 1 st, 2 nd, 3 th and 4 th pins of the wiring base P1 are respectively connected with the 27 th, 15 th, 28 th and 26 th pins of the chip U1, the 5 th pin is connected with a positive 12V power supply, and the 6 th pin is connected to GND.

The model of the single chip microcomputer chip U1 is STM32L151C8T 6.

The external crystal oscillator circuit of the single chip microcomputer comprises a second resistor R2, a first crystal oscillator Y1, a second capacitor C2 and a third capacitor C3. One end of the second resistor R2, one end of the first crystal oscillator Y1 and one end of the second capacitor C2 are connected with the 5 th pin of the chip U1; the second resistor R2, the other end of the first crystal oscillator Y1 and one end of the third capacitor C3 are connected with the 6 th pin of the chip U1; the other end of the second capacitor C2 and the other end of the third capacitor C3 are connected to GND.

The single chip microcomputer Key reset circuit comprises a first resistor R1, a first capacitor C1 and a Key. One end of the first resistor R1 is connected with a positive 3.3V power supply, and the other end is connected with the 7 th pin of the chip U1, one end of the first capacitor C1 and one end of the Key; the first capacitor C1 and the other end of the Key are connected to GND.

The single-chip microcomputer download circuit comprises a single-row pin SWD, wherein a1 st pin of the single-row pin SWD is connected with a positive 3.3V power supply, a 2 nd pin of the single-row pin SWD is connected with a 37 th pin of the chip U1, a 3 rd pin of the single-row pin SWD is connected with a 34 th pin of the chip U1, and a 4 th pin of the single-row pin SWD is connected with GND.

The serial port communication circuit of the single chip microcomputer comprises eighteenth and nineteenth resistors R18 and R19, a second pin and a third pin J2 and J3. One end of an eighteenth resistor R18 is connected with the 46 th pin of the chip U1, one end of a nineteenth resistor R19 is connected with the 21 st pin of the chip U1, the 1 st pins of the second pin, the third pin J2 and the J3 are connected with a positive 3.3V power supply, and the 4 th pin is connected to GND; the 2 nd pin and the 3 rd pin of the second pin row J2 are respectively connected with the 29 th pin and the 30 th pin of the chip U1. The 2 nd pin and the 3 rd pin of the third row of pins J3 are connected to the 12 th pin and the 13 th pin of the chip U1, respectively.

The door magnetic detection module comprises a two-wire normally-open door magnetic module and a base J1; two pins of the normally-open type door magnet module are respectively connected with two pins of the base J1, and two pins of the J1 are respectively connected with the 29 th pin and the 30 th pin of the chip U1.

The temperature monitoring module comprises a temperature sensor U5 and an eighth resistor R8. The 3 rd pin of the sensor U5 is connected with a positive 3.3V power supply, and the 2 nd pin is connected with the 25 th pin of the chip U1 and one end of an eighth resistor R8; the other end of the eighth resistor R8 is connected with 3.3V; the 1 st pin of the sensor U5 is connected to GND.

The model of the temperature sensor U5 is DS18B 20.

The lighting control module comprises ninth and tenth resistors R9 and R10, a light emitting diode LED, a triode Q7, a relay M1, a diode D2 and a wiring terminal J5. One end of the ninth resistor R9 and one end of the tenth resistor R10 are connected with the 43 rd pin of the chip U1, and the rest pins of the chip U1 are empty. The other end of the ninth resistor R9 is connected with the base electrode of the triode Q7, and the other end of the tenth resistor R10 is connected with the anode of the light-emitting diode; the cathode of the LED is connected with the emitter of the transistor Q7 and GND. The collector of the transistor Q7 is connected to pin 3 of the relay M1 and the anode of the diode D2. The cathode of the diode D2 is connected to pin 2 of the relay M1 and the positive 12V power supply. The 1 st pin and the 2 nd pin of the wiring terminal J5 are respectively connected with the 4 th pin and the 1 st pin of the relay M1. Two pins of the connecting terminal J5 are connected with two ends of one control wire of the contactor, and the relay controls the illuminating lamp connected to the contactor through controlling the control wire of the contactor.

The NB-IoT core system module comprises an NB-IoT peripheral circuit, an external antenna circuit, a VBAT input end filter circuit and an external USIM card seat circuit.

The NB-IoT peripheral circuit comprises an NB-IoT chip BC95-01 and a twentieth resistor R20.

Pins

2, 43, 47, 48, 51, 52 and 54 of the chip BC95-01 are connected with GND, pin 15 is connected with pin 7 of the chip U1, pin 45 is connected with pin 46 and named as VBAT port, pin 29 is connected to the other end of an eighteenth resistor R18, and pin 30 is connected to the other end of a nineteenth resistor R19. One end of the twentieth resistor R20 is connected to VBAT, and the other end is connected to the 29 th pin of the BC 95-01.

The model of the NB-IoT chip BC95-01 is BC-95.

The external antenna circuit comprises an ipex base U7 and a fourth resistor R4. One end of the fourth resistor R4 is connected to the 53 rd pin of the chip BC95-01, and the other end is connected to the 3 rd pin of the base U7.

Pins

1 and 2 of base U7 are connected to GND.

The VBAT input end filter circuit comprises a voltage stabilizing diode D1, seventh, eighth, ninth, tenth capacitors C7, C8, C9 and C10, wherein the cathode of a voltage stabilizing diode D1 and one ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 are connected to VBAT, and the anode of a voltage stabilizing diode D1 and the other ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 are connected to GND.

The external USIM card socket circuit comprises a Micro SIM card slot U3, an integrated TVS diode chip U4, fifth, sixth and seventh resistors R5, R6 and R7, and eleventh, twelfth, thirteenth and fourteenth capacitors C11, C12, C13 and C14. One end of the eleventh capacitor C11 is connected to the 1 st pin of the chip U4 and the 1 st pin of the card slot U3, and the other end is connected to the 4 th pin of the card slot U3. One end of the twelfth capacitor C12 is connected to the 2 nd pin of the card slot U3 and the 6 th pin of the chip U4, and the other end is connected to GND. One end of the thirteenth capacitor C13 is connected to the 3 rd pin of the card slot U3 and the 5 th pin of the chip U4, and the other end is connected to GND. One end of the fourteenth capacitor C14 is connected to the 6 th pin of the card slot U3 and the 4 th pin of the chip U4, and the other end is connected to GND. Pin 2 of the chip U4 is connected to GND, and pin 3 is floating. The 1 st pin of the card slot U3 is connected with the 38 th pin of the chip BC95-01, the 2 nd, 3 rd and 6 th pins are respectively connected with one ends of the sixth resistor R6, the seventh resistor R7 and the fifth resistor R5, the 4 th pin is connected with the 42 th pin of the chip BC95-01, and the 5 th pin is suspended. The other ends of the sixth resistor, the seventh resistor and the fifth resistor R6, R7 and R5 are respectively connected with the 39 th pin, the 41 th pin and the 40 th pin of the BC 95-01. The remaining pins of the chip BC95-01 are floating.

The power module of the main control board comprises a voltage stabilizing chip U2, capacitors C1-1, C1-2 and C1-3, resistors R1-1, R1-2, R1-5 and R1-6, a voltage stabilizing diode D3, a first inductor L1 and a 12V wiring terminal J4. The 7 th pin of a chip U2 is connected with the positive electrode of a resistor R1-1, a capacitor C1-2 and the 1 st pin of a wiring terminal J4, the 5 th pin is connected with the other end of the resistor R1-1 and one end of a resistor R1-2, the 1 st pin is connected with one end of a capacitor C1-1, the 8 th pin is connected with the other end of the capacitor C1-1 and the negative electrode of a zener diode D3, the 2 nd and 3 rd pins are suspended, the 4 th pin is connected with one end of a resistor R1-5 and one end of a resistor R1-6, and the 6 th and 9 th pins are connected with GND. The negative electrode of the capacitor C1-2, the other ends of the resistors R1-2 and R1-6 are connected with GND. One end of the first inductor L1 is connected with the cathode of the zener diode D3, and the other end is connected with the anode of the capacitor C1-3, the other end of the resistor R1-5, VBAT and the positive 3.3V power supply. The anode of the voltage-stabilizing diode D3 and the cathode of the capacitor C1-3 are connected with GND. The 1 st pin of J4 is connected with the 5 th pin of wiring base P1, the 2 nd pin is connected with GND, and the base of J4 is connected with a 12V power adapter.

The model number of the voltage stabilizing chip U2 is TPS 5430.

The lock control plate comprises a cabinet lock control module and a GPS positioning module.

The cabinet lock control module comprises a working indicator lamp circuit, a 12V-to-3.3V circuit, a cabinet lock door handle state monitoring circuit, a cabinet lock door handle control circuit and a wiring base P3.

The work indicator lamp circuit comprises a bicolor LED1 and second and third resistors R2 and R3. The 1 st pin of the LED1 is connected to one end of a second resistor R2, the 2 nd pin is connected to a positive 3.3V power supply, and the 3 rd pin is connected to one end of a third resistor R3. The other ends of the second resistor R2 and the third resistor R3 are respectively connected with the 1 st pin and the 3 rd pin of the wiring base P3.

The 12V-to-3.3V circuit comprises a voltage stabilizing chip Power _ Suply1 and first and second capacitors C1 and C2. The 1 st pin of the Power _ suppy 1 is connected with one end of the first capacitor C1 and the 5 th pin of the wiring base P3, the 2 nd pin is connected with the other end of the first capacitor C1 and GND, the 3 rd pin and the 4 th pin are suspended, and the 5 th pin is connected with one end of the second capacitor C2 and a positive 3.3V Power supply. The other terminal of the second capacitor C2 is connected to GND.

The cabinet lock handle state monitoring circuit comprises a reed switch A1 and a fourth resistor R4. One end of the reed switch A1 is connected with a positive 3.3V power supply, and the other end is connected with one end of a fourth resistor R4 and the 2 nd pin of a wiring base P3. The other end of the fourth resistor R4 is connected to GND.

The control circuit of the cabinet lock door handle comprises a binding post P2, a diode D1, a first resistor R1 and a triode Q1. Terminal P2 has pin 1 connected to the cathode of diode D1 and pin 5 of terminal pad P3, and pin 2 connected to the anode of diode D1 and the emitter of transistor Q1. The collector of the transistor Q1 is connected to GND, and the base is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to pin 4 of the terminal pad P3. The P2 wiring terminal is connected with the electromagnetic valve of the door lock through two lead wires to control the switch of the door lock handle.

The model of the triode Q1 is 2N 5551.

The 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P3 are respectively connected with the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P1 on the main control board through flat cables.

The GPS positioning module comprises a GPS positioning module. The vcc of the GPS module is connected to pin 1 of J3, the RX of the GPS module is connected to pin 2 of J3, the TX of the GPS module is connected to pin 3 of J3, and the gnd of the GPS module is connected to pin 4 of J3.

After the system is powered on, the work indicator lights flicker three times alternately in red and green, the CPU is initialized firstly, then the NB-IoT module is initialized, and after the system is connected to an NB-IoT network, the position information is acquired through the GPS module and uploaded to the cloud server. Then, the system detects whether there is an instruction from the cloud server or whether there is an abnormal situation in the door lock (such as the door lock is not closed for a long time). When an unlocking instruction from the cloud server is detected, the CPU controls the lock control board to enable the electromagnetic valve connected with the lock control board to work, the electromagnetic valve adsorbs the throat tongue of the door lock, the door handle is rotated to open the cabinet door, and meanwhile, the power indicator light alternately flashes three times in red and green. Then the solenoid valve outage, the spring bolt of inside spring with the lock puts down, when closing the cabinet door, and the spring bolt can pin the cabinet door automatically. If the door lock abnormality is detected, the CPU acquires positioning information through the GPS and sends the position information and the door lock abnormality to the server through the NB-IoT module. The system adopts the electronic chip lock core, and when the system is abnormal and the cabinet lock cannot be controlled to be opened, the electronic key bound with the lock core can be used for opening the cabinet lock. When the temperature abnormality is detected, an abnormal behavior operation, such as automatic door lock opening, is performed. And when the system recognizes that the door lock is closed, the lighting system is automatically closed.

The utility model discloses following beneficial effect has:

1. the utility model discloses a serial communication pin of door magnetic circuit access CPU chip accomplishes accepting and sending of door magnetic detection module signal through the serial ports, compares with an IO mouth of direct connection CPU in the traditional mode, has higher interference immunity, has effectively improved the stability of system.

2. The utility model discloses a BC95-01 module is connected to the CPU chip, and the data of near smoke alarm are acquireed to the lug connection server. When the smoke alarm gives an alarm in danger, the CPU chip automatically opens the door handle of the cabinet lock by the control circuit, so that equipment in the cabinet lock can be operated quickly, for example, power is cut off, and equipment loss is reduced.

3. The utility model discloses a temperature detection module adopts DS18B20 temperature sensor, can press close to the inside equipment of cabinet lock, and the temperature of real-time supervision equipment in case the equipment temperature is unusual, reports alarm message immediately and opens the door handle of cabinet lock automatically simultaneously, is favorable to the person on duty to take operation method rapidly.

4. The utility model discloses a lighting system passes through relay control contactor control, has improved the security of circuit, and increase lighting system's load has higher reliability.

5. The utility model discloses a two times cabinet lock state detects, once through the on off state that door magnetism module detected the chamber door, once through the on off state that the tongue tube on the lock accuse board detected the door handle. Therefore, the specific state of the cabinet lock can be accurately identified, and the abnormal state is prevented from being missed.

6. The utility model discloses with main control board and lock control board separation, not only can reduce the space of lock box, make moreover the utility model discloses have stronger compatibility, use on the cabinet lock of different grade type, can only change the lock control board.

7. The utility model discloses a GPS module can acquire positional information and be convenient for look for this system in spacious suburb. And meanwhile, the GPS module is used as a standby clock under the condition that the NB-IoT module is disconnected from the network, the running condition of the system is recorded, and the system is uploaded to a server when the NB-IoT module recovers the network.

Drawings

FIG. 1 is a circuit diagram of the present invention;

FIG. 2 is a peripheral circuit of a single chip microcomputer chip;

fig. 3 is a main control board wiring base P1;

FIG. 4 is an external crystal oscillator circuit of the single chip microcomputer;

FIG. 5 shows a key reset circuit of the single chip microcomputer;

FIG. 6 shows a single-chip download circuit;

FIG. 7 is a serial port communication circuit of the single chip microcomputer;

FIG. 8 is a circuit for detecting the magnetic force of the door of the cabinet lock;

FIG. 9 is a temperature monitoring and detection circuit;

FIG. 10 is a lighting control circuit;

FIG. 11 is an NB-IoT peripheral circuit;

FIG. 12 is a VBAT input filter circuit;

fig. 13 is an external USIM socket circuit;

FIG. 14 is a master board power module;

FIG. 15 is an operating indicator light circuit;

FIG. 16 is wiring mount P3;

FIG. 17 is a 12V to 3.3V circuit;

FIG. 18 is a circuit for monitoring the status of a cabinet door lock handle;

fig. 19 is a cabinet door lock handle control circuit.

Detailed Description

As shown in fig. 1, an intelligent cabinet lock system based on NB-IoT includes a single chip microcomputer core system module, a temperature monitoring module, a lighting control module working indicator lamp circuit, a door magnetism detection module circuit, a cabinet door lock handle monitoring circuit, a cabinet door lock handle control circuit, an NB-IoT core module, a power module, and a GPS positioning module. The singlechip core module comprises a singlechip chip peripheral circuit, a singlechip external crystal oscillator circuit, a singlechip key reset circuit, a singlechip download circuit and a singlechip serial port communication circuit. The NB-IoT core module comprises an NB-IoT peripheral circuit, an external antenna circuit, a VBAT input end filter circuit and an external USIM card seat circuit.

As shown in fig. 2 and 3, the peripheral circuit of the single chip includes a single chip U1, fourth, fifth and sixth capacitors C4, C5 and C6, and a wiring pad P1; the model of the chip U1 is STM32L151C8T 6; one end of each of the fourth, fifth and sixth capacitors C4, C5 and C6 is connected to a positive 3.3V power supply, the other end of the fourth capacitor C4 is connected with the 23 rd pin of the chip U1, the other end of the fifth capacitor C5 is connected with the 35 th pin of the chip U1, and the other end of the sixth capacitor C6 is connected with the 47 th pin of the chip U1; pins 8, 20, 23, 35, 44 and 47 of the chip U1 are connected to GND, and pins 9, 24, 36 and 48 are connected to a positive 3.3V power supply; the 1 st, 2 nd, 3 th and 4 th pins of the wiring base P1 are respectively connected with the 27 th, 15 th, 28 th and 26 th pins of a chip U1, the 5 th pin is connected with a positive 12V power supply, and the 6 th pin is connected to GND;

as shown in fig. 4, the external crystal oscillator circuit of the single chip microcomputer includes a second resistor R2, a first crystal oscillator Y1, and second and third capacitors C2 and C3; one end of the second resistor R2, one end of the first crystal oscillator Y1 and one end of the second capacitor C2 are connected with the 5 th pin of the chip U1; the second resistor R2, the other end of the first crystal oscillator Y1 and one end of the third capacitor C3 are connected with the 6 th pin of the chip U1; the other end of the second capacitor C2 and the other end of the third capacitor C3 are connected with GND;

as shown in fig. 5, the single chip microcomputer Key reset circuit includes a first resistor R1, a first capacitor C1 and a Key; one end of the first resistor R1 is connected with a positive 3.3V power supply, and the other end is connected with the 7 th pin of the chip U1, one end of the first capacitor C1 and one end of the Key; the other ends of the first capacitor C1 and the Key are connected to GND;

as shown in fig. 6, the single chip download circuit includes a single-row pin SWD, wherein pin 1 of the single-row pin SWD is connected to a positive 3.3V power supply, pin 2 of the single-row pin SWD is connected to pin 37 of the chip U1, pin 3 of the single-row pin SWD is connected to pin 34 of the chip U1, and pin 4 of the single-row pin SWD is connected to GND;

as shown in fig. 7, the serial port communication circuit of the single chip microcomputer includes eighteenth and nineteenth resistors R18 and R19, a second pin, and a third pin J2 and J3; one end of an eighteenth resistor R18 is connected with the 46 th pin of the chip U1, one end of a nineteenth resistor R19 is connected with the 21 st pin of the chip U1, the 1 st pins of the second pin, the third pin J2 and the J3 are connected with a positive 3.3V power supply, and the 4 th pin is connected to GND; the 2 nd pin and the 3 rd pin of the second pin J2 are respectively connected with the 29 th pin and the 30 th pin of the chip U1; the 2 nd pin and the 3 rd pin of the third row of pins J3 are respectively connected with the 12 th pin and the 13 th pin of the chip U1; the 16 th pin of the chip U1 is connected with the lock control plate, and the rest pins are empty;

as shown in fig. 8, the door magnetic detection module comprises a two-wire normally open door magnetic module and a base J1; two pins of the normally-open type door magnet module are respectively connected with two pins of the base J1, and two pins of the J1 are respectively connected with the 29 th pin and the 30 th pin of the chip U1.

As shown in FIG. 9, the temperature monitoring module includes a temperature sensor U5 and an eighth resistor R8. The temperature sensor U5 is model DS18B 20. The 3 rd pin of the sensor U5 is connected with a positive 3.3V power supply, and the 2 nd pin is connected with the 25 th pin of the chip U1 and one end of an eighth resistor R8; the other end of the eighth resistor R8 is connected with 3.3V; the 1 st pin of the sensor U5 is connected to GND.

As shown in fig. 10, the lighting control module includes ninth and tenth resistors R9 and R10, a light emitting diode LED, a transistor Q7, a relay M1, a diode D2, and a connection terminal J5. One end of the ninth resistor R9 and one end of the tenth resistor R10 are connected with the 43 rd pin of the chip U1, and the rest pins of the chip U1 are empty. The other end of the ninth resistor R9 is connected with the base electrode of the triode Q7, and the other end of the tenth resistor R10 is connected with the anode of the light-emitting diode; the cathode of the LED is connected with the emitter of the transistor Q7 and GND. The collector of the transistor Q7 is connected to pin 3 of the relay M1 and the anode of the diode D2. The cathode of the diode D2 is connected to pin 2 of the relay M1 and the positive 12V power supply. The 1 st pin and the 2 nd pin of the wiring terminal J5 are respectively connected with the 4 th pin and the 1 st pin of the relay M1. Two pins of the connecting terminal J5 are connected with two ends of one control wire of the contactor, and the relay controls the illuminating lamp connected to the contactor through controlling the control wire of the contactor.

As shown in FIG. 11, NB-IoT peripheral circuit includes NB-IoT chip BC95-01 and twentieth resistor R20. The external antenna circuit comprises an ipex base U7 and a fourth resistor R4. The model number of the NB-IoT chip BC95-01 is BC-95. One end of the twentieth resistor R20 is connected to VBAT, and the other end is connected to the 29 th pin of the BC 95-01.

Pins

2, 43, 46, 47, 48, 51, 52 and 54 of the chip BC95-01 are connected with GND, pin 15 is connected with pin 7 of the chip U1, pin 45 is connected with pin 46 and named as VBAT port, and the rest pins are all suspended. And the 29 th pin is connected to the other end of the eighteenth resistor R18, and the 30 th pin is connected to the other end of the nineteenth resistor R19. One end of the fourth resistor R4 is connected to the 53 rd pin 52 of the chip BC95-01, and the other end is connected to the 3 rd pin 3 of the base U7.

Pins

1 and 2 of base U7 are connected to GND.

As shown in fig. 12, the VBAT input terminal filter circuit includes a zener diode D1, a seventh capacitor C7, a seventh capacitor C8, a ninth capacitor C9, and a tenth capacitor C10, wherein a cathode of the zener diode D1 and one ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, and the tenth capacitor C10 are connected to VBAT, and an anode of the zener diode D1 and the other ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, and the tenth capacitor C10 are connected to GND.

As shown in fig. 13, the external USIM card socket circuit includes a Micro SIM card slot U3, an integrated TVS diode chip U4, fifth, sixth, and seventh resistors R5, R6, R7, and eleventh, twelfth, thirteenth, and fourteenth capacitors C11, C12, C13, and C14. One end of the eleventh capacitor C11 is connected to the 1 st pin of the chip U4 and the 1 st pin of the card slot U3, and the other end is connected to the 4 th pin of the card slot U3. One end of the twelfth capacitor C12 is connected to the 2 nd pin of the card slot U3 and the 6 th pin of the chip U4, and the other end is connected to GND. One end of the thirteenth capacitor C13 is connected to the 3 rd pin of the card slot U3 and the 5 th pin of the chip U4, and the other end is connected to GND. One end of the fourteenth capacitor C14 is connected to the 6 th pin of the card slot U3 and the 4 th pin of the chip U4, and the other end is connected to GND. Pin 2 of the chip U4 is connected to GND, and pin 3 is floating. The No. 1 pin of the card slot U3 is connected with the No. 38 pin of the BC95-01, the No. 2, No. 3 and No. 6 pins are respectively connected with one ends of the sixth resistor R6, the seventh resistor R7 and the fifth resistor R5, and the No. 5 pin is suspended. The other ends of the sixth resistor, the seventh resistor and the fifth resistor R6, R7 and R5 are respectively connected with the 39 th pin, the 41 th pin and the 40 th pin of the BC 95-01. The remaining pins of the chip BC95-01 are floating.

As shown in fig. 14, the main control board power module includes a voltage regulation chip U2, capacitors C1-1, C1-2, C1-3, resistors R1-1, R1-2, R1-3, R1-4, R1-5, R1-6, a voltage regulation diode D3, a first inductor L1, and a 12V connection terminal J4. The model number of the voltage stabilizing chip U2 is TPS 5430. The 7 th pin of a chip U2 is connected with the positive electrode of a resistor R1-1, a capacitor C1-2 and the 1 st pin of a wiring terminal J4, the 5 th pin is connected with the other end of the resistor R1-1 and one end of a resistor R1-2, the 1 st pin is connected with one end of a capacitor C1-1, the 8 th pin is connected with the other end of the capacitor C1-1 and the negative electrode of a zener diode D3, the 2 nd and 3 rd pins are suspended, the 4 th pin is connected with one end of a resistor R1-5 and one end of a resistor R1-6, and the 6 th and 9 th pins are connected with GND. The negative electrode of the capacitor C1-2, the other ends of the resistors R1-2 and R1-6 are connected with GND. One end of the first inductor L1 is connected with the cathode of the zener diode D3, and the other end is connected with the anode of the capacitor C1-3, the other end of the resistor R1-5, VBAT and the positive 3.3V power supply. The anode of the voltage-stabilizing diode D3 and the cathode of the capacitor C1-3 are connected with GND. The 1 st pin of J4 is connected to the 5 th pin of connection pad P1, and the 2 nd pin is connected to GND.

As shown in fig. 15 and 16, the operation indicating lamp circuit includes a two-color LED lamp LED1, second and third resistors R2 and R3, and a wiring base P3. The 1 st pin of the LED1 is connected to one end of a second resistor R2, the 2 nd pin is connected to a positive 3.3V power supply, and the 3 rd pin is connected to one end of a third resistor R3. The other ends of the second resistor R2 and the third resistor R3 are respectively connected with the 1 st pin and the 3 rd pin of the wiring base P3.

As shown in fig. 17, the circuit for converting 12V to 3.3V includes a voltage regulator chip Power _ suppy 1 and first and second capacitors C1 and C2; the 1 st pin of the Power _ Suly 1 is connected with one end of a first capacitor C1 and the 5 th pin of a wiring base P3, the 2 nd pin is connected with the other end of the first capacitor C1 and GND, the 3 rd pin and the 4 th pin are suspended, and the 5 th pin is connected with one end of a second capacitor C2 and a positive 3.3V Power supply; the other end of the second capacitor C2 is connected with GND;

as shown in FIG. 18, the cabinet door lock handle condition monitoring circuit includes a reed switch A1 and a fourth resistor R4. One end of the reed switch A1 is connected with a positive 3.3V power supply, and the other end is connected with one end of a fourth resistor R4 and the 2 nd pin of a wiring base P3. The other end of the fourth resistor R4 is connected to GND.

As shown in fig. 19, the control circuit of the door handle of the cabinet lock comprises a post P2, a diode D1, a first resistor R1, a transistor Q1; the model of the triode Q1 is 2N 5551; a1 st pin of the binding post P2 is connected with the cathode of the diode D1 and a 5 th pin of the binding post P3, and a 2 nd pin is connected with the anode of the diode D1 and the emitter of the triode Q1; the collector of the triode Q1 is connected with GND, and the base of the triode Q1 is connected with one end of the first resistor R1; the other end of the first resistor R1 is connected with the 4 th pin of the wiring base P3; the P2 wiring terminal is connected with the electromagnetic valve of the door lock through two lead wires to control the switch of the door lock handle; meanwhile, the electronic chip lock cylinder is adopted, and when the system is abnormal and the cabinet lock cannot be controlled to be opened, the electronic key bound with the lock cylinder can be used for opening the cabinet lock. The 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P3 are respectively connected with the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P1 on the main control board through flat cables;

the GPS positioning module comprises a GPS positioning module. The vcc of the GPS module is connected with the 1 st pin of J3, the RX of the GPS module is connected with the 2 nd pin of J3, the TX of the GPS module is connected with the 3 rd pin of J3, and the gnd of the GPS module is connected with the 4 th pin of J3;

after the solenoid valve circular telegram, the inside spring bolt of lock box upwards is drawn, and the cabinet door is opened to the solenoid valve can utilize magnetism, and the work pilot lamp lights. After detecting to unblank, the solenoid valve outage loses magnetism, and the spring bolt drops downwards, closes behind the cabinet door, and the spring bolt can pin the cabinet door automatically. When the cabinet door of the control cabinet is closed, the door magnetic detection module is conducted; when the cabinet door of the control cabinet is opened, the door magnetic detection module is disconnected. The state of the cabinet door of the control cabinet is determined by detecting the conduction state of the door magnetic detection module through the CPU. After the system is powered on, the CPU is initialized, and then the NB-IoT module is initialized and configured by the CPU, including the communication configuration of the SIM card. When the NB-IoT is connected to the network, the system reports the startup information to the cloud server, the cloud server returns an instruction after receiving the startup information, and the CPU acquires the GPS positioning information and uploads the GPS information to the cloud server. And then the system detects the on-off state of the cabinet lock and detects the data reception of NB-IoT in a timing cycle mode, and reports the on-off state of the cabinet lock as a heartbeat packet every 15 minutes. When the CPU detects that the NB-IoT receives an unlocking instruction, the CPU controls the lock control board to execute an unlocking command, at the moment, the cabinet door of the control cabinet can be automatically opened, the green light and the red light alternately flash, and meanwhile, the server is reported to be successfully unlocked. When the CPU detects that the cabinet lock state is abnormal, for example, the cabinet door is opened and not closed for a long time, the CPU controls the NB-IoT to upload the abnormal information of the cabinet lock state. The temperature monitoring module can detect the temperature of equipment in the cabinet lock, and an alarm is given when abnormal conditions occur. If the cabinet door is opened at night, the lighting circuit can be automatically opened.

The above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.

Claims

1. An NB-IoT based intelligent cabinet lock system, characterized in that: comprises a main control board and a lock control board;

the main control board comprises a single-chip microcomputer core system module, a door magnetism detection module, a temperature monitoring module, an illumination control module, an NB-IoT core system module and a main control board power module;

the single chip microcomputer core system module comprises a single chip microcomputer chip peripheral circuit, a single chip microcomputer external crystal oscillator circuit, a single chip microcomputer key reset circuit, a single chip microcomputer download circuit and a single chip microcomputer serial port communication circuit;

the peripheral circuit of the singlechip chip comprises a singlechip chip U1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a wiring base P1; the model of the chip U1 is STM32L151C8T 6; one end of each of the fourth, fifth and sixth capacitors C4, C5 and C6 is connected to a positive 3.3V power supply, the other end of the fourth capacitor C4 is connected with the 23 rd pin of the chip U1, the other end of the fifth capacitor C5 is connected with the 35 th pin of the chip U1, and the other end of the sixth capacitor C6 is connected with the 47 th pin of the chip U1; pins 8, 20, 23, 35, 44 and 47 of the chip U1 are connected to GND, and pins 9, 24, 36 and 48 are connected to a positive 3.3V power supply; the 1 st, 2 nd, 3 th and 4 th pins of the wiring base P1 are respectively connected with the 27 th, 15 th, 28 th and 26 th pins of a chip U1, the 5 th pin is connected with a positive 12V power supply, and the 6 th pin is connected to GND;

the external crystal oscillator circuit of the single chip microcomputer comprises a second resistor R2, a first crystal oscillator Y1, a second capacitor C2 and a third capacitor C3; one end of the second resistor R2, one end of the first crystal oscillator Y1 and one end of the second capacitor C2 are connected with the 5 th pin of the chip U1; the second resistor R2, the other end of the first crystal oscillator Y1 and one end of the third capacitor C3 are connected with the 6 th pin of the chip U1; the other end of the second capacitor C2 and the other end of the third capacitor C3 are connected with GND;

the single chip microcomputer Key reset circuit comprises a first resistor R1, a first capacitor C1 and a Key; one end of the first resistor R1 is connected with a positive 3.3V power supply, and the other end is connected with the 7 th pin of the chip U1, one end of the first capacitor C1 and one end of the Key; the other ends of the first capacitor C1 and the Key are connected to GND;

the single-chip microcomputer download circuit comprises a single-row pin SWD, wherein a1 st pin of the single-row pin SWD is connected with a positive 3.3V power supply, a 2 nd pin of the single-row pin SWD is connected with a 37 th pin of the chip U1, a 3 rd pin of the single-row pin SWD is connected with a 34 th pin of the chip U1, and a 4 th pin of the single-row pin SWD is connected with GND;

the serial port communication circuit of the single chip microcomputer comprises eighteenth and nineteenth resistors R18 and R19, a second pin, a third pin J2 and J3; one end of an eighteenth resistor R18 is connected with the 46 th pin of the chip U1, one end of a nineteenth resistor R19 is connected with the 21 st pin of the chip U1, the 1 st pins of the second pin, the third pin J2 and the J3 are connected with a positive 3.3V power supply, and the 4 th pin is connected to GND; the 2 nd pin and the 3 rd pin of the second pin J2 are respectively connected with the 29 th pin and the 30 th pin of the chip U1; the 2 nd pin and the 3 rd pin of the third row of pins J3 are respectively connected with the 12 th pin and the 13 th pin of the chip U1;

the door magnetic detection module comprises a two-wire normally-open door magnetic module and a base J1; two pins of the normally-open type door magnet module are respectively connected with two pins of a base J1, and two pins of a J1 are respectively connected with the 29 th pin and the 30 th pin of a chip U1;

the temperature monitoring module comprises a temperature sensor U5 and an eighth resistor R8; the model of the sensor U5 is DS18B 20; the 3 rd pin of the sensor U5 is connected with a positive 3.3V power supply, and the 2 nd pin is connected with the 25 th pin of the chip U1 and one end of an eighth resistor R8; the other end of the eighth resistor R8 is connected with 3.3V; the 1 st pin of the sensor U5 is connected with GND;

the lighting control module comprises ninth and tenth resistors R9 and R10, a light emitting diode LED, a triode Q7, a relay M1, a diode D2 and a wiring terminal J5; one end of the ninth resistor R9 and one end of the tenth resistor R10 are connected with the 43 rd pin of the chip U1, and the rest pins of the chip U1 are empty; the other end of the ninth resistor R9 is connected with the base electrode of the triode Q7, and the other end of the tenth resistor R10 is connected with the anode of the light-emitting diode; the cathode of the LED is connected with the emitter of the triode Q7 and GND; the collector of the triode Q7 is connected with the 3 rd pin of the relay M1 and the anode of the diode D2; the cathode of the diode D2 is connected with the 2 nd pin of the relay M1 and the positive 12V power supply; the 1 st pin and the 2 nd pin of the wiring terminal J5 are respectively connected with the 4 th pin and the 1 st pin of the relay M1; two pins of the wiring terminal J5 are connected with two ends of one control line of the contactor, and the relay controls an illuminating lamp connected to the contactor through controlling the control line of the contactor;

the NB-IoT core system module comprises an NB-IoT peripheral circuit, an external antenna circuit, a VBAT input end filter circuit and an external USIM card seat circuit;

the NB-IoT peripheral circuit comprises an NB-IoT chip BC95-01 and a twentieth resistor R20; the model of the chip BC95-01 is BC-95; pins 2, 43, 47, 48, 51, 52 and 54 of the chip BC95-01 are connected with GND, a pin 15 is connected with a pin 7 of the chip U1, a pin 45 is connected with a pin 46 and named as a VBAT port, a pin 29 is connected to the other end of an eighteenth resistor R18, and a pin 30 is connected to the other end of a nineteenth resistor R19; one end of the twentieth resistor R20 is connected with VBAT, and the other end is connected with the 29 th pin of the BC 95-01;

the external antenna circuit comprises an ipex base U7 and a fourth resistor R4; one end of the fourth resistor R4 is connected with the 53 rd pin of the chip BC95-01, and the other end is connected with the 3 rd pin of the base U7; pins 1 and 2 of the base U7 are connected to GND;

the VBAT input end filter circuit comprises a voltage stabilizing diode D1, seventh, eighth, ninth, tenth capacitors C7, C8, C9 and C10, wherein the cathode of a voltage stabilizing diode D1 and one ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 are connected to VBAT, and the anode of a voltage stabilizing diode D1 and the other ends of the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 are connected to GND;

the external USIM card socket circuit comprises a Micro SIM card slot U3, an integrated TVS diode chip U4, fifth, sixth and seventh resistors R5, R6, R7, eleventh, twelfth, thirteenth and fourteenth capacitors C11, C12, C13 and C14; one end of an eleventh capacitor C11 is connected with the 1 st pin of the chip U4 and the 1 st pin of the card slot U3, and the other end is connected with the 4 th pin of the card slot U3; one end of a twelfth capacitor C12 is connected with the 2 nd pin of the card slot U3 and the 6 th pin of the chip U4, and the other end of the twelfth capacitor C12 is connected with GND; one end of a thirteenth capacitor C13 is connected with the 3 rd pin of the card slot U3 and the 5 th pin of the chip U4, and the other end of the thirteenth capacitor C13 is connected with GND; one end of a fourteenth capacitor C14 is connected with the 6 th pin of the card slot U3 and the 4 th pin of the chip U4, and the other end of the fourteenth capacitor C14 is connected with GND; a No. 2 pin of the chip U4 is connected with GND, and a No. 3 pin is suspended; the 1 st pin of the card slot U3 is connected with the 38 th pin of the BC95-01, the 2 nd, the 3 rd and the 6 th pins are respectively connected with one ends of a sixth resistor R6, a seventh resistor R7 and a fifth resistor R5, the 4 th pin is connected with the 42 th pin of the BC95-01, and the 5 th pin is suspended; the other ends of the sixth resistor, the seventh resistor and the fifth resistor R6, R7 and R5 are respectively connected with the 39 th pin, the 41 th pin and the 40 th pin of the BC 95-01; the rest pins of the chip BC95-01 are suspended;

the power supply module of the main control board comprises a voltage stabilizing chip U2, capacitors C1-1, C1-2 and C1-3, resistors R1-1, R1-2, R1-5 and R1-6, a voltage stabilizing diode D3, a first inductor L1 and a 12V wiring terminal J4; the model number of the chip U2 is TPS 5430; a 7 th pin of a chip U2 is connected with a resistor R1-1, the anode of a capacitor C1-2 and a1 st pin of a connecting terminal J4, a 5 th pin is connected with the other end of the resistor R1-1 and one end of a resistor R1-2, the 1 st pin is connected with one end of a capacitor C1-1, an 8 th pin is connected with the other end of the capacitor C1-1 and the cathode of a zener diode D3, pins 2 and 3 are suspended, a 4 th pin is connected with one ends of resistors R1-5 and R1-6, and pins 6 and 9 are connected with GND; the negative electrode of the capacitor C1-2, the other ends of the resistors R1-2 and R1-6 are connected with GND; one end of a first inductor L1 is connected with the cathode of a voltage stabilizing diode D3, and the other end of the first inductor L1 is connected with the anode of a capacitor C1-3, the other end of a resistor R1-5, VBAT and a positive 3.3V power supply; the anode of the voltage-stabilizing diode D3 and the cathode of the capacitor C1-3 are connected with GND; the 1 st pin of the J4 is connected with the 5 th pin of the wiring base P1, the 2 nd pin is connected with GND, and the base of the J4 is connected with a 12V power adapter;

the lock control plate comprises a cabinet lock control module and a GPS positioning module;

the cabinet lock control module comprises a working indicator lamp circuit, a 12V-to-3.3V circuit, a cabinet lock door handle state monitoring circuit, a cabinet lock door handle control circuit and a wiring base P3;

the work indicator lamp circuit comprises a bicolor LED1 and second and third resistors R2 and R3; a1 st pin of the LED1 is connected with one end of a second resistor R2, a 2 nd pin is connected with a positive 3.3V power supply, and a 3 rd pin is connected with one end of a third resistor R3; the other ends of the second resistor R2 and the third resistor R3 are respectively connected with the 1 st pin and the 3 rd pin of the wiring base P3;

the circuit for converting 12V into 3.3V comprises a voltage stabilizing chip Power _ Suply1, a first capacitor C1 and a second capacitor C2; the 1 st pin of the Power _ Suly 1 is connected with one end of a first capacitor C1 and the 5 th pin of a wiring base P3, the 2 nd pin is connected with the other end of the first capacitor C1 and GND, the 3 rd pin and the 4 th pin are suspended, and the 5 th pin is connected with one end of a second capacitor C2 and a positive 3.3V Power supply; the other end of the second capacitor C2 is connected with GND;

the cabinet lock handle state monitoring circuit comprises a reed switch A1 and a fourth resistor R4; one end of the reed switch A1 is connected with a positive 3.3V power supply, and the other end is connected with one end of a fourth resistor R4 and a 2 nd pin of a wiring base P3; the other end of the fourth resistor R4 is connected with GND;

the control circuit of the cabinet lock door handle comprises a binding post P2, a diode D1, a first resistor R1 and a triode Q1; the model of the triode Q1 is 2N 5551; a1 st pin of the binding post P2 is connected with the cathode of the diode D1 and a 5 th pin of the binding post P3, and a 2 nd pin is connected with the anode of the diode D1 and the emitter of the triode Q1; the collector of the triode Q1 is connected with GND, and the base of the triode Q1 is connected with one end of the first resistor R1; the other end of the first resistor R1 is connected with the 4 th pin of the wiring base P3; the P2 wiring terminal is connected with the electromagnetic valve of the door lock through two lead wires to control the switch of the door lock handle;

the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P3 are respectively connected with the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th pins of the wiring base P1 on the main control board through flat cables;

the GPS positioning module comprises a GPS positioning module; the vcc of the GPS module is connected to pin 1 of J3, the RX of the GPS module is connected to pin 2 of J3, the TX of the GPS module is connected to pin 3 of J3, and the gnd of the GPS module is connected to pin 4 of J3.

2. The NB-IoT based smart locker system in claim 1 wherein: the system adopts the electronic chip lock core, and when the system is abnormal and the cabinet lock cannot be controlled to be opened, the electronic key bound with the lock core can be used for opening the cabinet lock.