CN107862779A - A kind of Dynamic Two-dimensional code electronic lock of low-power consumption - Google Patents

Abstract

The invention discloses a dynamic two-dimensional code electronic lock with low power consumption, which includes a microprocessor MSP430, an electromagnetic switch, a lock beam mechanism, a lock state detection module, a vibration power generation module, a power management module, a storage battery, and an E-ink ink screen module, bluetooth communication module, button module. The electric energy generated by the vibration power generation module is stored in the battery after passing through the power management module. When not working, the microprocessor MSP430 puts the whole into a low power consumption mode through the power management module to improve energy efficiency. The user can scan the QR code through the mobile terminal supporting application to obtain the dynamic password, and at the same time send the obtained dynamic password to the lock through Bluetooth to unlock. Every time the lock is unlocked, the microprocessor MSP430 will be triggered to generate a new dynamic password, which will be encrypted and encoded into a QR code and displayed on the E-ink ink screen module, thus realizing the dynamic update of the QR code and improving security. When the bluetooth communication is blocked, the lock can still be unlocked by entering a dynamic password through the key module, thereby ensuring reliability.

Description

A low-power dynamic two-dimensional code electronic lock

technical field

The invention relates to a dynamic two-dimensional code electronic lock, in particular to a dynamic two-dimensional code electronic lock with low power consumption.

Background technique

Traditional mechanical locks have the disadvantage that the key cannot be changed, and some non-password mechanical locks require matching physical keys, which are not only easy to lose but also easy to be copied, which brings a lot of management costs. At present, electronic locks are gradually becoming popular in public places such as hotels and shopping malls, but there are still problems that the keys cannot be changed or need to be changed manually. In addition, the short standby time or the need for wired connections also restrict the development of electronic locks.

Contents of the invention

Purpose of the present invention: to propose a new type of low-power dynamic two-dimensional code electronic lock device, which uses algorithm encryption technology, power management technology and low-power device design technology to solve the problem that the key cannot be changed or needs to be changed manually , short standby time and other issues, the dynamic two-dimensional code electronic lock with safe and reliable password and low power consumption is realized.

For realizing the purpose of the present invention, technical scheme is:

A dynamic two-dimensional code electronic lock with low power consumption, including microprocessor MSP430, electromagnetic switch, lock beam mechanism, lock state detection module, vibration power generation module, power management module, battery, E-ink ink screen module, Bluetooth communication module, button module, electromagnetic switch is connected with the microprocessor MSP430, the lock beam mechanism is controlled by the electromagnetic switch, the lock state detection module detects the state of the lock beam mechanism and feeds back the detection result to the microprocessor MSP430, the electric energy generated by the vibration power generation module is generated by The power management module stores it in the battery for subsequent use. The power management module provides working power for the microprocessor MSP430, electromagnetic switch, lock status detection module, E-ink ink screen module, Bluetooth communication module, and key module, which improves the The efficiency of the overall circuit reduces the overall energy consumption. The E-ink ink screen module is connected with the microprocessor MSP430. The E-ink ink screen module can still maintain the screen after power off. The Bluetooth communication module is connected with the microprocessor MSP430. The device MSP430 communicates with the mobile terminal through the Bluetooth communication module, and the key module is connected with the microprocessor MSP430. When the Bluetooth communication is blocked, the user can enter the dynamic password through the key module to unlock, thus ensuring reliability.

Beneficial effects of the present invention: 1. Low power consumption: adopt ultra-low power consumption microprocessor MSP430, E-ink ink screen module and other low power consumption devices, add power management module, let the whole enter into low power consumption mode when not working Standby improves the overall circuit efficiency and further reduces energy consumption.

2. Extend the standby time: add vibration power generation module to collect energy and improve energy utilization.

3. High security: one code at a time, no repetition. Every time the lock is unlocked, the microprocessor MSP430 will be triggered to generate a new dynamic password, which will be encrypted and coded into a new QR code and displayed on the E-ink ink screen module, thereby realizing the dynamic update of the QR code and improving security. When the Bluetooth communication is blocked, the lock can still be unlocked by keying in a dynamic password, thereby ensuring reliability.

4. Easy to use: Users can directly scan the QR code on the E-ink ink screen module through the mobile terminal supporting application to unlock, which is simple and fast.

Description of drawings

Fig. 1 is a schematic structural diagram of a dynamic two-dimensional code electronic lock with low power consumption according to the present invention.

Fig. 2 is a schematic diagram of the hardware circuit of the E-ink ink screen module of a low-power dynamic two-dimensional code electronic lock of the present invention.

Fig. 3 is a schematic diagram of a hardware circuit of a vibration electric energy acquisition management module of a low-power dynamic two-dimensional code electronic lock according to the present invention.

1: Microprocessor MSP430; 2: Electromagnetic switch; 3: Lock beam mechanism; 4: Lock status detection module; 5: Vibration power generation module; 6: Power management module; 7: Battery; 8: E-ink ink screen module; 9: Bluetooth communication module; 10: Button module.

Detailed ways

A low-power dynamic two-dimensional code electronic lock, as shown in Figure 1, includes a microprocessor MSP430 (1), an electromagnetic switch (2), a lock beam mechanism (3), a lock state detection module (4), a vibration Power generation module (5), power management module (6), battery (7), E-ink ink screen module (8), Bluetooth communication module (9), key module (10). The electromagnetic switch (2) is connected to the microprocessor MSP430 (1), the lock beam mechanism (3) is controlled by the electromagnetic switch (2), and the lock state detection module (4) detects the state of the lock beam mechanism (3) and feeds back the detection result to the microprocessor MSP430(1). The vibration power generation module (5) is connected with the power management module (6), the storage battery (7) is connected with the power management module (6), and the power management module (6) is a microprocessor MSP430 (1), an electromagnetic switch (2), a lock The state detection module (4), the E-ink ink screen module (8), the Bluetooth communication module (9), and the button module (10) provide working power. The E-ink ink screen module (8) is connected with the microprocessor MSP430 (1), the bluetooth communication module (9) is connected with the microprocessor MSP430 (1), and the button module (10) is connected with the microprocessor MSP430 (1).

Working principle: The microprocessor MSP430 (1) generates a dynamic password through an internal algorithm and encodes it into a two-dimensional code and displays it on the E-ink ink screen module (8). The user can scan the QR code and decode it to obtain a dynamic password through the supporting application program on the mobile terminal, and at the same time establish Bluetooth communication with the lock, and send the decoded dynamic password to the lock. When the bluetooth communication is blocked, the dynamic password obtained by decoding can still be keyed in through the key module (10). When the microprocessor MSP430 (1) receives the input dynamic password through the Bluetooth communication module (9) or the key module (10), it will verify it with the originally generated dynamic password, and if the verification passes, it will drive the electromagnetic switch (2) to unlock , otherwise the lock will not be unlocked. The microprocessor MSP430 (1) knows the state of the lock beam mechanism (3) through the lock state detection module (4). When the lock beam mechanism (3) is opened from the closed state, it will trigger the microprocessor MSP430 (1) to generate a new The dynamic password is encrypted and encoded into a new two-dimensional code and displayed on the E-ink ink screen module (8), thereby realizing the dynamic update of the two-dimensional code. The electric energy generated by the vibration power generation module (5) is stored in the storage battery (7) by the power management module (6). Microprocessor MSP430 (1) detects that there is no use within the set time (default is 1 minute), and then controls the power management module (6) to enter the low power consumption mode for standby, thereby reducing the overall power consumption and prolonging the standby time. time.

As shown in Figure 2, the E-ink ink screen module (8) includes: resistor R1, resistor R2, capacitor C1, capacitor C2, capacitor C3, inductor L1, diode D1, diode D2, diode D3, NMOS tube N1, E- ink screen U1. One end of capacitor C1 is connected to GND, and the other end is connected to point A of the E-ink ink screen module (8). Point A of the E-ink ink screen module (8) is connected to VCC. One end of the inductor L1 is connected to point A of the E-ink ink screen module (8), and the other end is connected to the drain of the NMOS transistor N1. One end of the resistor R1 is connected to GND, and the other end is connected to the gate of the NMOS transistor N1. One end of the resistor R2 is connected to GND, and the other end is connected to the source of the NMOS transistor N1. The cathode of diode D1 is connected to point C of the E-ink ink screen module (8), and the anode is connected to the drain of NMOS transistor N1. One end of capacitor C3 is connected to GND, and the other end is connected to point C of the E-ink ink screen module (8). One end of the capacitor C2 is connected to the drain of the NMOS transistor N1, and the other end is connected to point B of the E-ink ink screen module (8). The cathode of diode D2 is connected to GND, and the anode is connected to point B of the E-ink ink screen module (8). The cathode of diode D3 is connected to point B of the E-ink ink screen module (8), and the anode is connected to the PREVGL pin of E-ink screen U1. The RESE pin of the E-ink screen U1 is connected to the source of the NMOS tube N1, the PREVGH pin is connected to the C point of the E-ink ink screen module (8), the GDR pin is connected to the gate of the NMOS tube N1, the VCC pin is connected to VCC, and the GND pin is connected to GND, BUSY pin is connected to GPIO0 pin of microprocessor MSP430 (1), RES pin is connected to GPIO1 pin of microprocessor MSP430 (1), DC pin is connected to GPIO2 pin of microprocessor MSP430 (1), CS pin is connected to microprocessor The GPIO3 pin of MSP430 (1), the SCLK pin is connected to the GPIO4 pin of the microprocessor MSP430 (1), and the SDIO pin is connected to the GPIO5 pin of the microprocessor MSP430 (1).

Working principle: The microprocessor MSP430 (1) establishes SPI communication with the E-ink screen U1, and the microprocessor MSP430 (1) sends the internally coded two-dimensional code display information to the E-ink screen U1 through the SPI bus. The encoded QR code is displayed on the E-ink screen U1.

As shown in Fig. 3, the vibration power generation module (5) includes: a spring S1, a spring S2, a casing S3, an induction coil X1, and a magnet M1. One end of the spring S1 is connected to the fixed end of point D of the shell S3, and the other end is connected to the N pole of the magnet M1. One end of the spring S2 is connected to the fixed end of point E of the shell S3, and the other end is connected to the S pole of the magnet M1. The induction coil X1 is wound on the outer surface of the shell S3, one end is connected to the PIN0 pin of the power management module (6), and the other end is connected to the PIN1 pin of the power management module (6). The magnet M1 can vibrate in the casing S3 along with the movement of the external lock body to generate a changing magnetic field, thereby generating an induced electromotive force on the induction coil X1. The positive pole of the battery (7) is connected to the PIN2 pin of the power management module (6), and the negative pole is connected to the PIN3 pin of the power management module (6). The power management module (6) includes: resistor R3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, inductor L2, inductor L3, LTC3331 power management chip U2. The PIN0 pin of the power management module (6) is connected to the AC2 pin of the LTC3331 power management chip U2, and the PIN1 pin is connected to the AC1 pin of the LTC3331 power management chip U2. One end of the capacitor C4 is connected to the AC1 pin of the LTC3331 power management chip U2, and the other end is connected to the AC2 pin of the LTC3331 power management chip U2. One end of the capacitor C5 is connected to the VIN pin of the LTC3331 power management chip U2, and the other end is connected to the CAP pin of the LTC3331 power management chip U2. One end of the capacitor C6 is connected to the VIN pin of the LTC3331 power management chip U2, and the other end is connected to GND. One end of the capacitor C7 is connected to the VIN2 pin of the LTC3331 power management chip U2, and the other end is connected to GND. The UV3 pin of the LTC3331 power management chip U2 is connected to the VIN2 pin of the LTC3331 power management chip U2, the UV2 pin is connected to GND, the UV1 pin is connected to the VIN2 pin of the LTC3331 power management chip U2, and the UV0 pin is connected to the VIN2 pin of the LTC3331 power management chip U2. The PIN2 pin of the power management module (6) is connected to the BAT_IN pin of the LTC3331 power management chip U2, and the PIN3 pin is connected to GND. One end of the capacitor C8 is connected to the BAT_IN pin of the LTC3331 power management chip U2, and the other end is connected to GND. One end of the resistor R3 is connected to the CHARGE pin of the LTC3331 power management chip U2, and the other end is connected to the BAT_OUT pin of the LTC3331 power management chip U2. One end of the capacitor C9 is connected to the BAT_OUT pin of the LTC3331 power management chip U2, and the other end is connected to GND. The BB_IN pin of LTC3331 power management chip U2 is connected to the BAT_OUT pin of LTC3331 power management chip U2, the FLOAT1 pin is connected to GND, the FLOAT0 pin is connected to GND, the LBSEL pin is connected to the BAT_OUT pin of LTC3331 power management chip U2, the SHIP pin is connected to GND, and the GND pin is connected to GND. One end of the capacitor C10 is connected to the VIN3 pin of the LTC3331 power management chip U2, and the other end is connected to GND. OUT0 pin of LTC3331 power management chip U2 is connected to GND, OUT1 pin is connected to GND, OUT2 pin is connected to VIN3 pin of LTC3331 power management chip U2, IPK0 pin is connected to GND, IPK1 pin is connected to GND, IPK2 pin is connected to GND, BAL pin is connected to GND, SCAP pin Connect to GND. One end of the capacitor C11 is connected to the VOUT pin of the LTC3331 power management chip U2, and the other end is connected to GND. One end of the inductor L3 is connected to the SW pin of the LTC3331 power management chip U2, and the other end is connected to the VOUT pin of the LTC3331 power management chip U2. One end of the inductor L2 is connected to the SWA pin of the LTC3331 power management chip U2, and the other end is connected to the SWB pin of the LTC3331 power management chip U2. The VOUT pin of LTC3331 power management chip U2 is connected to VCC to supply power for the whole.

Working principle: The small AC power generated by the vibration power generation module (5) is stored in the battery (7) after being stepped up and down by the power management module (6). When the ambient vibration energy is strong, the power management module (6) directly uses The electric energy generated by the vibration power generation module (5) supplies power to the whole and charges the battery (7). When the environmental vibration energy is weak or absent, the power management module (6) uses the electric energy of the battery (7) to supply power to the whole, thereby providing The whole provides a stable working power supply.

Claims (3)

1. A dynamic two-dimensional code electronic lock with low power consumption, including a microprocessor MSP430 (1), an electromagnetic switch (2), a lock beam mechanism (3), a lock state detection module (4), and a vibration power generation module (5 ), power management module (6), battery (7), E-ink ink screen module (8), bluetooth communication module (9), button module (10), characterized in that the electromagnetic switch (2) and micro The processor MSP430 (1) is connected, the lock beam mechanism (3) is controlled by the electromagnetic switch (2), the lock state detection module (4) detects the state of the lock beam mechanism (3), and the lock state The detection module (4) feeds back the detection result to the microprocessor MSP430 (1), the vibration power generation module (5) is connected to the power management module (6), and the battery (7) is connected to the power management module (6) connection, the power management module (6) is a microprocessor MSP430 (1), an electromagnetic switch (2), a lock status detection module (4), an E-ink ink screen module (8), and a Bluetooth communication module (9) . The button module (10) provides working power, the E-ink ink screen module (8) is connected to the microprocessor MSP430 (1), and the Bluetooth communication module (9) is connected to the microprocessor MSP430 (1) , the key module (10) is connected with the microprocessor MSP430 (1). 2. The low-power dynamic two-dimensional code electronic lock according to claim 1, characterized in that the microprocessor MSP430 (1) generates a dynamic password through an internal algorithm and encrypts and encodes it into a two-dimensional code displayed on the On the E-ink ink screen module (8), the E-ink ink screen module (8) includes: resistor R1, resistor R2, capacitor C1, capacitor C2, capacitor C3, inductor L1, diode D1, diode D2, diode D3, NMOS tube N1, E-ink screen U1, one end of the capacitor C1 is connected to GND, the other end is connected to point A of the E-ink ink screen module (8), the E-ink ink screen module (8) Point A is connected to VCC, one end of the inductor L1 is connected to point A of the E-ink ink screen module (8), the other end is connected to the drain of the NMOS tube N1, one end of the resistor R1 is connected to GND, and the other end is connected to the NMOS tube The gate of N1, one end of the resistor R2 is connected to GND, the other end is connected to the source of the NMOS transistor N1, the cathode of the diode D1 is connected to the C point of the E-ink ink screen module (8), and the positive electrode is connected to the NMOS transistor N1 Drain, one end of the capacitor C3 is connected to GND, the other end is connected to point C of the E-ink ink screen module (8), one end of the capacitor C2 is connected to the drain of the NMOS tube N1, and the other end is connected to the E-ink ink screen Point B of the module (8), the cathode of the diode D2 is connected to GND, the anode is connected to point B of the E-ink ink screen module (8), and the cathode of the diode D3 is connected to B of the E-ink ink screen module (8) Point, the positive pole is connected to the PREVGL pin of the E-ink screen U1, the RESE pin of the E-ink screen U1 is connected to the source of the NMOS tube N1, the PREVGH pin is connected to the C point of the E-ink ink screen module (8), and the GDR pin Connect to the gate of NMOS tube N1, VCC pin to VCC, GND pin to GND, BUSY pin to GPIO0 pin of microprocessor MSP430 (1), RES pin to GPIO1 pin of microprocessor MSP430 (1), DC pin to micro The GPIO2 pin of the processor MSP430 (1), the CS pin is connected to the GPIO3 pin of the microprocessor MSP430 (1), the SCLK pin is connected to the GPIO4 pin of the microprocessor MSP430 (1), and the SDIO pin is connected to the GPIO5 of the microprocessor MSP430 (1) foot. 3. The low power consumption dynamic two-dimensional code electronic lock according to claim 1, characterized in that the power management module (6) can store the electric energy generated by the vibration power generation module (5) in the battery (7) , the vibration power generation module (5) includes: spring S1, spring S2, shell S3, induction coil X1, magnet M1, one end of the spring S1 is connected to the fixed end of point D of the shell S3, and the other end is connected to the magnet M1 The N pole is connected, one end of the spring S2 is connected to the fixed end of point E of the shell S3, and the other end is connected to the S pole of the magnet M1, the induction coil X1 is wound on the outer surface of the shell S3, and one end is connected to the power management module (6) is connected to the PIN0 pin, and the other end is connected to the PIN1 pin of the power management module (6). The magnet M1 can vibrate in the shell S3 with the movement of the external lock body to generate a changing magnetic field, thereby inducing The induced electromotive force is generated on the coil X1, the positive pole of the battery (7) is connected to the PIN2 pin of the power management module (6), the negative pole is connected to the PIN3 pin of the power management module (6), and the power management module (6) Including: resistor R3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, inductor L2, inductor L3, LTC3331 power management chip U2, the power management module (6) The PIN0 pin of the LTC3331 power management chip U2 is connected to the AC2 pin, and the PIN1 pin is connected to the AC1 pin of the LTC3331 power management chip U2. One end of the capacitor C4 is connected to the AC1 pin of the LTC3331 power management chip U2, and the other end is connected to the LTC3331 power management chip U2. AC2 pin, one end of the capacitor C5 is connected to the VIN pin of the LTC3331 power management chip U2, the other end is connected to the CAP pin of the LTC3331 power management chip U2, one end of the capacitor C6 is connected to the VIN pin of the LTC3331 power management chip U2, and the other end is connected to GND, one end of the capacitor C7 is connected to the VIN2 pin of the LTC3331 power management chip U2, and the other end is connected to GND, the UV3 pin of the LTC3331 power management chip U2 is connected to the VIN2 pin of the LTC3331 power management chip U2, the UV2 pin is connected to GND, UV1 The pin is connected to the VIN2 pin of the LTC3331 power management chip U2, the UV0 pin is connected to the VIN2 pin of the LTC3331 power management chip U2, the PIN2 pin of the power management module (6) is connected to the BAT_IN pin of the LTC3331 power management chip U2, and the PIN3 pin is connected to GND. One end of the capacitor C8 is connected to the BAT_IN pin of the LTC3331 power management chip U2, and the other end is connected to GND. One end of the resistor R3 is connected to the CHARGE pin of the LTC3331 power management chip U2, and the other end is connected to the BAT_OUT pin of the LTC3331 power management chip U2. One end of the capacitor C9 is connected to the LTC3331 power management chip U2 The BAT_OUT pin, the other end is connected to GND, the BB_IN pin of the LTC3331 power management chip U2 is connected to the BAT_OUT pin of the LTC3331 power management chip U2, the FLOAT1 pin is connected to GND, the FLOAT0 pin is connected to GND, and the LBSEL pin is connected to the BAT_OUT pin of the LTC3331 power management chip U2 , the SHIP pin is connected to GND, the GND pin is connected to GND, one end of the capacitor C10 is connected to the VIN3 pin of the LTC3331 power management chip U2, and the other end is connected to GND, the OUT0 pin of the LTC3331 power management chip U2 is connected to GND, and the OUT1 pin is connected to GND , OUT2 pin is connected to VIN3 pin of LTC3331 power management chip U2, IPK0 pin is connected to GND, IPK1 pin is connected to GND, IPK2 pin is connected to GND, BAL pin is connected to GND, SCAP pin is connected to GND, and one end of the capacitor C11 is connected to LTC3331 power management chip U2 One end of the inductor L3 is connected to the SW pin of the LTC3331 power management chip U2, and the other end is connected to the VOUT pin of the LTC3331 power management chip U2. One end of the inductor L2 is connected to the LTC3331 power management chip U2. The SWA pin, the other end is connected to the SWB pin of the LTC3331 power management chip U2, and the VOUT pin of the LTC3331 power management chip U2 is connected to VCC to supply power for the whole.