CN111882703A - Intelligent door lock circuit based on LORA wireless communication technology and intelligent door lock - Google Patents
Intelligent door lock circuit based on LORA wireless communication technology and intelligent door lock Download PDFInfo
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- CN111882703A CN111882703A CN202010662722.9A CN202010662722A CN111882703A CN 111882703 A CN111882703 A CN 111882703A CN 202010662722 A CN202010662722 A CN 202010662722A CN 111882703 A CN111882703 A CN 111882703A
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- door lock
- power supply
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00634—Power supply for the lock
- G07C2009/00642—Power supply for the lock by battery
Abstract
The invention discloses an intelligent door lock circuit based on an LORA wireless communication technology and an intelligent door lock. Wherein, intelligence lock circuit includes: interface module, power module, clock module, motor drive module, local control module, radio frequency module wherein, radio frequency module is the LORA module, includes: the radio frequency chip, the RF main control chip and the RF switch module; the radio frequency chip, the RF main control chip and the RF switch module are communicated with each other; the RF main control chip controls the on-off state of the RF switch module; the type of the radio frequency chip comprises SX1278IMLTRT, the type of the RF main control chip comprises STM8L051F3P6, and the type of the chip of the RF switch module comprises PE 4259. Compared with the prior art, based on the LORA wireless communication technology, the intelligent door lock circuit realizes low power consumption, stability, strong penetration ability and remote management and self state information feedback, is convenient for centralized management of the door lock, greatly improves the management efficiency, and reduces the management cost and the equipment hardware cost.
Description
Technical Field
The invention relates to the field of door locks, in particular to an intelligent door lock circuit based on an LORA wireless communication technology and an intelligent door lock.
Background
With the development of the internet of things technology, the intelligent door lock is an intelligent product with higher attention, is also an intelligent home and internet of things development direction which is approved by most practitioners at present, and has a wide market prospect.
The existing intelligent door lock technology is based on WiFi technology, Bluetooth technology, NO-IOT technology and Zigbee technology to realize remote control door opening. The WiFi technology has the defects of high power consumption, short communication distance and poor wall penetrating effect; the Bluetooth technology has the defects of short communication distance and poor wall penetrating effect; the NB-IOT technology has the disadvantages of high power consumption and operator dependence; the Zigbee has the defects of large power consumption, short communication distance and poor wall penetrating effect; in conclusion, the existing intelligent door lock consumes much power, has poor cruising ability, small communication range and poor signal penetration ability. Therefore, how to improve the performance of the existing intelligent door lock is very important.
Disclosure of Invention
The invention mainly aims to provide an intelligent door lock circuit based on an LORA wireless communication technology, and aims to solve the technical problem of improving the performance of the existing intelligent door lock.
The invention provides an intelligent door lock circuit based on an LORA wireless communication technology, which comprises:
the interface module is used for being in butt joint with the lock body interface and providing an input power supply;
the power supply module is used for reducing the voltage of an input power supply and supplying power to each functional module of the circuit;
the clock module is used for setting and reading the current time;
the motor driving module is used for unlocking and locking the lock body;
the local control module is used for controlling the work of each functional module of the circuit;
the radio frequency module is used for receiving and transmitting signals;
wherein, the radio frequency module is the LORA module, includes: the radio frequency chip, the RF main control chip and the RF switch module;
the radio frequency chip, the RF main control chip and the RF switch module are communicated with each other;
the RF main control chip controls the on-off state of the RF switch module;
the type of the radio frequency chip comprises SX1278IMLTRT, the type of the RF main control chip comprises STM8L051F3P6, and the type of the chip of the RF switch module comprises PE 4259.
Preferably, the intelligent door lock circuit further comprises a buzzer module;
the first power supply output end of the power supply module is connected with the power supply input end of the buzzer module;
and a first signal output end of the local control module is connected with a signal input end of the buzzer module.
Preferably, the intelligent door lock circuit further comprises a password key interface module;
the password key interface module is used for inputting a door opening password by a user;
the second power supply output end of the power supply module is connected with the power supply input end of the password key interface module;
and the signal output end of the password key interface module is connected with the first signal input end of the local control module.
Preferably, the intelligent door lock circuit further comprises a read-write card module;
the read-write card module is used for unlocking by swiping a card, local authorization and local unbinding by a user;
the third power supply output end of the power supply module is connected with the power supply input end of the read-write card module;
and the signal output end of the read-write card module is connected with the second signal input end of the local control module.
Preferably, the RF switch module includes an RF switch chip and an antenna;
the antenna is used for receiving external signals and sending signals outwards;
the RF switch chip is in bidirectional communication connection with the antenna;
the radio frequency chip is in bidirectional communication connection with the RF switch chip;
the RF main control chip is in bidirectional communication connection with the radio frequency chip;
and the signal output end of the RF main control chip is connected with the signal input end of the RF switch chip to control the working state of the RF switch module.
Preferably, the motor driving module includes a driving chip;
the model of the driving chip comprises L9110S;
the fourth power supply output end of the power supply module is connected with the power supply input end of the motor driving module;
and a second signal output end of the local control module is connected with a signal input end of the motor driving module to drive the motor driving module to work.
Preferably, the fifth power supply output end of the power supply module is connected with the power supply input end of the clock module;
and a third signal input end of the local control module is connected with a signal output end of the clock module.
Preferably, the local control module comprises a control chip, and the models of the control chip comprise STM8L151K4T6 and STM8L151K6T 6.
Preferably, in the transmitting state, the radio frequency module transmits signals at a frequency of 434 MHZ;
in the receiving state, the radio frequency module filters external signals and extracts radio frequency signals with frequency of 471 MHZ.
The invention also provides an intelligent door lock based on the LORA wireless communication technology, which comprises the intelligent door lock circuit based on the LORA wireless communication technology.
The invention has the beneficial effects that: this scheme is based on LORA wireless communication technology, and through the cooperation of each functional module, intelligent lock circuit realizes that the energy consumption is low, the signal is strong, wide cover, stability is high, has greatly reduced the hardware cost and the operation cost of intelligent lock. In addition, the door lock can be remotely managed and feeds self state information back to the external equipment, so that centralized management of the door lock is facilitated, and the management efficiency of operators is greatly improved.
Drawings
Fig. 1 is a functional block diagram of a first embodiment of an intelligent door lock circuit based on LORA wireless communication technology according to the present invention;
fig. 2 is a functional block diagram of a second embodiment of an intelligent door lock circuit based on LORA wireless communication technology according to the present invention;
fig. 3 is a schematic circuit diagram of a first embodiment of an intelligent door lock circuit based on LORA wireless communication technology according to the present invention;
FIG. 4 is a schematic circuit diagram of a second embodiment of an intelligent door lock circuit based on LORA wireless communication technology according to the present invention;
FIG. 5 is a schematic circuit diagram of an interface module of an intelligent door lock circuit based on LORA wireless communication technology in FIG. 1;
FIG. 6 is a schematic circuit diagram of a power module of the intelligent door lock circuit based on LORA wireless communication technology in FIG. 1;
FIG. 7 is a schematic circuit diagram of a clock module of the intelligent door lock circuit based on LORA wireless communication technology in FIG. 1;
FIG. 8 is a schematic circuit diagram of a motor driving module of the intelligent door lock circuit based on LORA wireless communication technology in FIG. 1;
FIG. 9 is a schematic circuit diagram of a local control module of the intelligent door lock circuit of FIG. 1 based on LORA wireless communication technology;
FIG. 10 is a schematic circuit diagram of a radio frequency module of the smart door lock circuit of FIG. 1 based on LORA wireless communication technology;
fig. 11 is a schematic circuit diagram of a buzzer module of the smart door lock circuit based on LORA wireless communication technology in fig. 2;
fig. 12 is a schematic circuit diagram of a password key interface module of the intelligent door lock circuit based on LORA wireless communication technology in fig. 2;
fig. 13 is a schematic circuit diagram of a read-write card module of the smart door lock circuit based on LORA wireless communication technology in fig. 2.
Description of reference numerals:
1. an interface module; 2. A power supply module; 3. A clock module; 4. A motor drive module;
5. a local control module; 6. A radio frequency module; 61. A radio frequency chip; 62. An RF master control chip;
63. an RF switch module; 631. An RF switch chip; 632. An antenna;
7. a buzzer module; 8. A password key interface module; 9. And a read-write card module.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, 3, and 5 to 10, the present invention provides an intelligent door lock circuit based on LORA wireless communication technology, including:
the interface module 1 is used for being butted with the lock body interface and providing an input power supply;
the power module 2 is used for reducing the voltage of an input power supply and supplying power to each functional module of the circuit;
the clock module 3 is used for setting and reading the current time;
the motor driving module 4 is used for unlocking and locking the lock body;
the local control module 5 is used for controlling the work of each functional module of the circuit;
the radio frequency module 6 is used for receiving and transmitting signals;
wherein, the radio frequency module 6 includes a LORA module, including: a radio frequency chip 61, an RF main control chip 62 and an RF switch module 63;
the radio frequency chip 61, the RF main control chip 62 and the RF switch module 63 are communicated with each other;
the RF main control chip 62 controls the on-off state of the RF switch module 63;
the model of the radio frequency chip 61 comprises SX1278IMLTRT, the model of the RF main control chip 62 comprises STM8L051F3P6, and the model of the chip of the RF switch module 63 comprises PE 4259.
In the embodiment of the invention, the intelligent door lock circuit is applied to an intelligent door lock, the intelligent door lock is contained in an intelligent door lock system, and the intelligent door lock system comprises an application terminal controlled by a user, a server, a gateway and an intelligent door lock. The power supply module 2 is used for reducing the external voltage (4.5V-6V) to 3.3V to supply power to each functional module, wherein the power supply chip comprises ME6210A33 PG. In this scheme, the mode of unblanking of intelligence lock has four kinds: remote unlocking, door card unlocking, password unlocking and key unlocking.
Taking remote unlocking as an example, when the radio frequency module 6 is in a receiving state, the RF switch module 63 receives an unlocking instruction transmitted by an external device and sends the unlocking instruction to the radio frequency chip 61, the radio frequency chip 61 sends the unlocking instruction to the RF main control chip 62, and the RF main control chip 62 judges whether the unlocking instruction is valid; if so, an unlocking signal is generated and transmitted to the motor driving module 4, so that unlocking is realized. In the embodiment of the present invention, the RF switch module includes an RF switch chip 631 and an antenna 632. The local control module 5 comprises a control chip, the model of the control chip comprises STM8L151K4T6 and STM8L151K6T6, and in the embodiment of the invention, the model of the control chip is STM8L151K4T 6.
Taking door card unlocking as an example, when the radio frequency module 6 is in a receiving state, the RF switch module 63 receives a card issuing instruction transmitted by an external device and sends the card issuing instruction to the radio frequency chip 61, the radio frequency chip 61 sends the card issuing instruction to the RF main control chip 62, and the RF main control chip 62 judges whether the card issuing instruction is valid; if yes, the received door card ID information is stored in an EEPROM of the control chip STM8L151K4T6, and the feedback message is organized. The interface module 1 reads the encrypted information of the door card and the ID information of the door card, the local control module 5 compares the ID information of the door card and the encrypted information which are locally stored in the intelligent door lock with the ID information and the encrypted information of the door card read from the door card, and if the two are consistent, the local control module 5 sends an unlocking instruction to the motor driving module 4 to complete unlocking.
In the embodiment of the invention, the intelligent door lock is generally powered by 4 No. 5 batteries, and has an abnormally high requirement on the overall power consumption of a door lock circuit. The model of the control chip comprises STM8L151K4T6 and STM8L151K6T6, the external interfaces of the two chips meet the requirements of functions of a door lock circuit such as UART (Universal Asynchronous Receiver/Transmitter), card swiping, passwords, a buzzer and a motor drive module 4, and meanwhile, the ROM (Read-Only Memory) and RAM (random access Memory) resources in the chip also meet the requirements, thereby realizing ultra-low power consumption on the basis and greatly reducing the power consumption of the door lock circuit.
In the embodiment of the invention, the RF control chip 62 of the intelligent door lock only controls the LORA chip and the RF switch chip 631, no other module circuits are arranged on the periphery, corresponding external interface resources are less, the external interface resources only meet the requirements of LORA communication, control of the RF switch module 64, communication UART interfaces of the radio frequency module 6 and the local control module 5 chip, and simultaneously meet the requirements of the chip on ROM and RAM resources, so that the RF main control chip 62 selects the model STM8L051F3P 6; the RF signal of the radio frequency module 6 adopts a linear layout, and the layout has the greatest characteristic of reducing signal diffusion of a circuit caused by a certain turning, thereby attenuating the maximum transmission power of the RF signal, and simultaneously, the multistage low-pass filter is added, so that the interference of multiple harmonics generated by the RF signal on other circuits and other electronic products of the intelligent door lock is reduced, the interference of other external signals on the RF signal is also reduced, the power when the RF signal is transmitted through the antenna 632 is closer to the power output by the LORA chip, and the optimal transmission power is realized.
The signal flow of the radio frequency signal receiving process is as follows: the pin 1 of the antenna 632 receives an external radio frequency signal, and transmits the external radio frequency signal to the RF switch chip 631 through a signal input terminal (i.e., RFC pin) of the RF switch chip PE 4259; the RF switch chip 631 sends the external radio frequency signal to the RFI _ LF pin of the radio frequency chip 61 through the signal output terminal (i.e., the RF1 pin), wherein the peripheral circuit of the radio frequency module 6 filters out the corresponding radio frequency signal (i.e., the radio frequency signal of 471 MHz) and sends the radio frequency signal to the radio frequency chip 61 for processing; the RF chip 61 transmits an external RF signal to the signal input terminals (i.e., PB4 to PB7 pins) of the RF main control chip 62 through the signal output terminals (i.e., SCK pin, MISO pin, MOSI pin, and NSS pin); the RF main control chip 62 decrypts and determines whether the radio frequency signal is valid, if so, the PC5 pin is used as a signal output terminal to send a signal to the control chip of the local control module 5, and the control chip uses the PD1 pin as a signal input terminal to generate a motor driving signal, which is output to the motor driving module 4 through the signal output terminal (i.e., the PB0 pin and the PB1 pin), so as to unlock the lock body.
When the lock body is unlocked, the interface module 1 generates a feedback signal and sends the feedback signal to the local control module 5, the local control module 5 sends the feedback signal to the RF main control chip 62, the RF main control chip 62 modulates the radio frequency chip 61 into a transmitting state after judging that the signal is valid, the RF switch module 63 is switched to a transmitting end, the radio frequency signal is sent out at 434MHz through the 50 omega matching circuit and the antenna 632, information of unlocking is sent to external equipment, and the receiving state is immediately switched after the transmission is finished. In the embodiment of the present invention, the chip type of the interface module 1 includes CON 8.
The signal flow of the radio frequency signal transmission process is as follows: a signal output end (any pin of 3 rd, 4 th and 5 th pins) of a CON8 chip of the interface module 1 outputs a feedback signal of the lock body; the control chip of the local control module 5 receives the feedback signal with a signal input terminal (any one of PD4, PD5 and PD 6), and then outputs the signal with a signal output terminal (PD 2 pin) to the RF main control chip 62; a signal input end (a pin PC 6) of the RF main control chip 62 receives a feedback signal, sends the encrypted feedback signal to the radio frequency chip 61 through a first RF signal output end (a pin PB4 to a pin PB 7), and a signal input end (a pin PB4 to a pin PB 7) of the radio frequency chip 61 receives the feedback signal; meanwhile, the RF main control chip 62 generates a start signal, and sends the start signal to the RF switch chip 631 through the second RF signal output terminal (PD 2 pin and PB3 pin), and the RF switch chip 631 (No. 4 pin and No. 6 pin) receives the start signal as a signal input terminal and switches to a transmitting terminal; the signal output terminal (PA _ BOOST pin) of the RF chip 61 sends to the RF switch chip 631 at 434 MHz; the signal input terminal (RF 2 pin) of the RF switch chip 631 transmits the received feedback signal to the antenna 632 through the signal output terminal (RFC pin), thereby transmitting the feedback signal to the external device.
In the embodiment of the invention, the power module 1 adopts ultra-low static working current, wide input voltage, low voltage difference (11 mV @ Iout =10 mA), high output precision of 2% and high current output of 500mA to ensure that each functional module does not cause voltage drop when working, thereby avoiding insufficient power and abnormal working of the radio frequency module 6 caused by insufficient voltage and current of the radio frequency module 6.
In addition, in the embodiment of the invention, the traditional intelligent door lock circuit is controlled by one chip, and in a normal standby state, the receiving circuit controls the chip to actively wake up at 1-2S intervals to detect whether a useful signal or data is received, and at the moment, other module circuits of the intelligent door lock also work to generate corresponding power consumption; the intelligent door lock adopts two control chips (the chips of an RF main control chip 62 and a local control module 5) to respectively control functional circuits such as an RF module, a local UART, a card swiping module, a password, a buzzer, a motor driving module and the like; in a normal standby state, only the RF module control chip will wake up actively to detect whether a useful signal or data is received, the control chip of the local control module 5 is always in an ultra-low power consumption state, and the corresponding local UART, card swiping, password, buzzer, motor driving module and other functional circuits do not work, thereby achieving the purpose of reducing power consumption.
Through the setting, based on LORA wireless communication technology, through the cooperation of each functional module, intelligent lock circuit realizes that the energy consumption is low, the signal is strong, wide coverage, stability are high, has greatly reduced the hardware cost and the operation cost of intelligent lock. In addition, the door lock can be remotely managed and feeds self state information back to the external equipment, so that centralized management of the door lock is facilitated, and the management efficiency of operators is greatly improved.
Referring to fig. 2, 3, 6, 9 and 11, the intelligent door lock circuit further includes a buzzer module 7;
a first power supply output end of the power supply module 2 is connected with a power supply input end of the buzzer module 7;
a first signal output end of the local control module 5 is connected with a signal input end of the buzzer module 7.
In the embodiment of the present invention, a Vout pin of a chip U1 of the power module 1 is used as a first power supply output terminal and connected to a collector of a transistor Q1 in the buzzer module 7; a PB2 pin of the control chip of the local control module 5 is connected to a base of a transistor Q1 in the buzzer module 7 as a first signal output terminal. When the control chip of the local control module 5 receives the external radio frequency signal and judges that the external radio frequency signal is effective, a buzzing signal is generated and sent to the buzzing module 7 so as to remind a user of successful unlocking on site.
Referring to fig. 2, 4, 6, 9 and 12, the intelligent door lock circuit further includes a password key interface module 8;
the password key interface module 8 is used for inputting a door opening password by a user;
a second power supply output end of the power supply module 2 is connected with a power supply input end of the password key interface module 8;
the signal output end of the password key interface module 8 is connected with the first signal input end of the local control module 5.
In the embodiment of the present invention, a Vout pin of the chip U1 of the power module 1 is used as a second power supply output terminal to connect to pin No. 3 of the component J7 of the password key interface module 8. The No. 3 pin and the No. 4 pin of the component J7 are used as signal output ends of the password key interface module 8 to be connected with the PA2 pin and the PA3 pin of the control chip of the local control module 5. In the embodiment of the present invention, the password key interface module 8 transmits the unlocking signal to the local control module 5, and after the local control module 5 recognizes that the unlocking signal is valid, the unlocking signal is sent to the motor driving module 4, and meanwhile, a buzzer signal is sent to the buzzer module 7. Through the setting, realize that intelligent lock unblanks through the password button, the pluralism has provided the selection of unblanking, the user of greatly making things convenient for.
Referring to fig. 2, 3, 6, 9 and 13, the smart door lock circuit further includes a read/write card module 9;
the card reading and writing module 9 is used for unlocking by swiping a card by a user, local authorization and local unbinding;
the third power supply output end of the power module 2 is connected with the power supply input end of the read-write card module 9;
and the signal output end of the read-write card module 9 is connected with the second signal input end of the local control module 5.
In the embodiment of the invention, the card reading and writing module 9 is used for card swiping unlocking, local authorization and local unbinding of a user. The Vout pin of the chip U1 of the power module 1 is connected as a third power supply output terminal to the PVDD pin, the DVDD pin, the SVDD pin, and the I2C _ EA pin of the card controller FM 17522E. After a user swipes a card, the J11 chip receives a card swiping signal and transmits the signal to an RX pin connected with a read-write card control chip through the 1 st pin to the 3 rd pin; the card reading and writing control chip judges that the card swiping signal is valid and reads the ID information, and sends the unlocking signal to the PB 4-PB 7 pins of the control chip of the local control module 5 through the No. 24, No. 29, No. 30 and No. 31 pins of the card reading and writing control chip. And the local control module 5 drives unlocking after receiving the card swiping signal.
Specifically, the read-write card control chip sends out a 13.56MHz carrier signal through TX1 and TX2 pins, receives the 13.56MHz carrier signal through RX pin, and resolves the carrier signal into a digital signal and sends the digital signal to the control chip of the local control module 5 through the SPI serial port.
The control chip pin PB0 of the local control module 5 outputs a high level, the PB1 outputs a low level, and the level lasts for 60ms, so that the unlocking action can be completed; the control chip pin PB0 of the local control module 5 outputs a low level, the control chip pin PB1 outputs a high level, and the level duration time is 60ms, so that the lock back action can be completed; when the control chip pins PB0 and PB1 of the local control module 5 are both at the low level, the driver chip is in the standby state. Through the setting, the card of punching is realized opening by intelligence lock circuit, avoids under the special circumstances, and the single mode of unblanking causes the user difficulty of unblanking.
Referring to fig. 1, 3, 6, 8 and 9, the motor driving module 4 includes a driving chip;
the model of the driving chip comprises L9110S;
the fourth power supply output end of the power supply module 2 is connected with the power supply input end of the motor driving module 4;
and a second signal output end of the local control module 5 is connected with a signal input end of the motor driving module 4 to drive the motor driving module 4 to work.
In the embodiment of the present invention, the Vout pin of the chip U1 of the power module 1 is connected to the pins No. 2 and No. 3 of the chip U5 of the motor driving module 4 as a fourth power supply output terminal. In the embodiment of the invention, different unlocking modes exist, and the signal output pins of the local control module 5 are different.
Taking remote unlocking as an example, the PB0 and PB1 pins of the control chip of the local control module 5 are connected to the signal input terminals (i.e., the IA pin and the IB pin) of the driver chip as the second signal output terminals. An OA pin and an OB pin of the driving chip are used as signal output ends to be connected with a signal input end of the interface module 1, and lock unlocking of the lock body is achieved.
Taking card swiping unlocking as an example, pins PB4 to PB7 of the control chip of the local control module 5 are connected to the signal input terminals (i.e., pins IA and IB) of the driving chip as second signal output terminals. An OA pin and an OB pin of the driving chip are used as signal output ends to be connected with a signal input end of the interface module 1, and lock unlocking of the lock body is achieved.
By selecting the drive chip of the motor drive module 4 with the model number of L9110S, the door lock has good performance and low price, and reduces the production cost on the premise of ensuring the performance of the door lock.
Referring to fig. 1, 3, 6, 7 and 9, a fifth power supply output terminal of the power module 2 is connected to a power supply input terminal of the clock module 3;
a third signal input of the local control module 5 is connected to a signal output of the clock module 3.
In the embodiment of the present invention, the Vout pin of the chip U1 of the power module 1 is connected to the VDD pin of the clock chip U2 as the fifth power supply output terminal. The third signal input of the local control module 5 (pin PC1 to PC 4) is connected to the signal output of the clock module 3 (pin SCA, pin SDL and pin INT). Through the arrangement, the normal work of the local chip is ensured.
Further, in the transmitting state, the rf module 6 transmits signals at a frequency of 434 MHZ;
in the receiving state, the rf module 6 filters the external signal and extracts the rf signal with a frequency of 471 MHZ.
In the embodiment of the invention, the uplink frequency of the door lock circuit is 434MHz, and the downlink frequency is 471MHz, so that the signal transmission and reception can be completed simultaneously, and the risk of data collision is reduced.
Furthermore, the invention also provides an intelligent door lock based on the LORA wireless communication technology, which comprises the intelligent door lock circuit based on the LORA wireless communication technology.
In the embodiment of the invention, based on the LORA wireless communication technology, the intelligent door lock realizes low power consumption and wide coverage through the cooperation of all functional modules, and the hardware cost and the operation cost of the intelligent door lock are greatly reduced. In addition, the door lock feeds the state information of the door lock back to the external equipment, so that centralized management of the door lock is facilitated, and the management efficiency of operators is greatly improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An intelligent door lock circuit based on LORA wireless communication technology, characterized by, includes:
the interface module is used for being in butt joint with the lock body interface and providing an input power supply;
the power supply module is used for reducing the voltage of the input power supply and supplying power to each functional module of the circuit;
the clock module is used for setting and reading the current time;
the motor driving module is used for unlocking and locking the lock body;
the local control module is used for controlling the work of each functional module of the circuit;
the radio frequency module is used for receiving and transmitting signals;
wherein, the radio frequency module is the LORA module, includes: the radio frequency chip, the RF main control chip and the RF switch module;
the radio frequency chip, the RF main control chip and the RF switch module are communicated with each other;
the RF main control chip controls the on-off state of the RF switch module;
the type of the radio frequency chip comprises SX1278IMLTRT, the type of the RF main control chip comprises STM8L051F3P6, and the type of the chip of the RF switch module comprises PE 4259.
2. The LORA wireless communication technology-based intelligent door lock circuit according to claim 1, further comprising a buzzer module;
the first power supply output end of the power supply module is connected with the power supply input end of the buzzer module;
and a first signal output end of the local control module is connected with a signal input end of the buzzer module.
3. The LORA wireless communication technology-based intelligent door lock circuit according to claim 1, further comprising a password key interface module;
the password key interface module is used for inputting a door opening password by a user;
the second power supply output end of the power supply module is connected with the power supply input end of the password key interface module;
and the signal output end of the password key interface module is connected with the first signal input end of the local control module.
4. The LORA wireless communication technology-based intelligent door lock circuit according to claim 1, further comprising a read-write card module;
the read-write card module is used for unlocking by swiping a card, local authorization and local unbinding by a user;
the third power supply output end of the power supply module is connected with the power supply input end of the read-write card module;
and the signal output end of the read-write card module is connected with the second signal input end of the local control module.
5. The LORA wireless communication technology-based smart door lock circuit of claim 1, wherein the RF switch module comprises an RF switch chip and an antenna;
the antenna is used for receiving external signals and sending signals outwards;
the RF switch chip is in bidirectional communication connection with the antenna;
the radio frequency chip is in bidirectional communication connection with the RF switch chip;
the RF main control chip is in bidirectional communication connection with the radio frequency chip;
and the signal output end of the RF main control chip is connected with the signal input end of the RF switch chip to control the working state of the RF switch module.
6. The LORA wireless communication technology-based intelligent door lock circuit according to claim 1, wherein the motor driving module comprises a driving chip;
the model of the driving chip comprises L9110S;
a fourth power supply output end of the power supply module is connected with a power supply input end of the motor driving module;
and a second signal output end of the local control module is connected with a signal input end of the motor driving module to drive the motor driving module to work.
7. The LORA wireless communication technology-based intelligent door lock circuit according to claim 1, wherein a fifth power supply output terminal of the power supply module is connected to a power supply input terminal of the clock module;
and a third signal input end of the local control module is connected with a signal output end of the clock module.
8. An intelligent door lock circuit based on LORA wireless communication technology according to any claim 1 to 7, characterized in that the local control module comprises a control chip, and the models of the control chip comprise STM8L151K4T6 and STM8L151K6T 6.
9. The LORA wireless communication technology-based intelligent door lock circuit according to any one of claims 1 to 7,
in a transmitting state, the radio frequency module transmits signals at a frequency of 434 MHz;
and in a receiving state, the radio frequency module filters external signals and extracts radio frequency signals with frequency of 471 MHZ.
10. An intelligent door lock based on LORA wireless communication technology, characterized by comprising the intelligent door lock circuit based on LORA wireless communication technology of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010662722.9A CN111882703A (en) | 2020-07-10 | 2020-07-10 | Intelligent door lock circuit based on LORA wireless communication technology and intelligent door lock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010662722.9A CN111882703A (en) | 2020-07-10 | 2020-07-10 | Intelligent door lock circuit based on LORA wireless communication technology and intelligent door lock |
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| CN111882703A true CN111882703A (en) | 2020-11-03 |
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| CN202010662722.9A Pending CN111882703A (en) | 2020-07-10 | 2020-07-10 | Intelligent door lock circuit based on LORA wireless communication technology and intelligent door lock |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113968A (en) * | 2021-04-07 | 2021-07-13 | 西安英诺视通科技有限公司 | Remote control method for cable channel well lid based on LORA wireless communication technology |
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2020
- 2020-07-10 CN CN202010662722.9A patent/CN111882703A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113968A (en) * | 2021-04-07 | 2021-07-13 | 西安英诺视通科技有限公司 | Remote control method for cable channel well lid based on LORA wireless communication technology |
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