CN109184361B - Door lock with high safety and working method thereof - Google Patents
Door lock with high safety and working method thereof Download PDFInfo
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- CN109184361B CN109184361B CN201811267969.XA CN201811267969A CN109184361B CN 109184361 B CN109184361 B CN 109184361B CN 201811267969 A CN201811267969 A CN 201811267969A CN 109184361 B CN109184361 B CN 109184361B
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- serial communication
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- chip
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Classifications
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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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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
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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
- G07C9/00563—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
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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
- G07C9/00944—Details of construction or manufacture
Abstract
The invention relates to a door lock with high safety and a working method thereof, wherein the door lock comprises a front control board, a rear control board and a rear clutch, the rear clutch comprises a first power source and a clutch body, and a first control chip U1, an information input unit and a first serial communication interface are arranged on the front control board; the rear control panel is provided with a second control chip U2, an ID key unit, a second serial communication interface and a first driving unit; an ID key unit for pairing ID information of the front control board and the rear control board; the information input unit acquires unlocking information; the first control chip U1 receives unlocking information and mixes the unlocking information with ID information of the front control board and the rear control board to form an encrypted signal; the second control chip U2 decrypts the encrypted signals to obtain ID information of the front control board and the rear control board, compares the ID information and outputs control signals according to the comparison result; the first driving unit drives the first power source to work or stop working according to the control signal. The invention improves the safety of the door lock.
Description
Technical Field
The present invention relates to door locks, and more particularly, to a door lock having high security and a method of operating the same.
Background
The intelligent door lock is developed along with the development of electronic technology, and is incomparable with mechanical locks in the aspects of convenience in use, illegal unlocking prevention, intelligent management and the like, so that the intelligent door lock is widely applied to industries with high safety requirements, and the common electronic door locks on the market are mainly magnetic card, IC card, TM card and radio frequency card electronic door locks.
However, the existing intelligent door lock is generally composed of a front panel and a rear panel, a control chip and an unlocking clutch mechanism are installed on the front panel, a battery is installed on the rear panel, the control chip detects key input, biological characteristic identification input information, wireless input signals such as ISM frequency band RF, bluetooth, infrared, zigbee or NB_IOT or RFID card information, and the control chip drives the unlocking clutch mechanism to unlock after verifying that the input password or information is correct, and the unlocking clutch mechanism uses a direct current motor. Because the control chip, the key board and the unlocking clutch mechanism of the intelligent door lock are arranged on the front panel of the intelligent door lock, the control chip transmits unlocking information to the unlocking clutch mechanism, when pulse interference sent by a Tesla coil is encountered, the control chip is reset to unlock or the control chip is halted to automatically reset to unlock, or high-level pulse is generated on an intelligent door lock circuit, so that a power source of the unlocking clutch mechanism is unlocked by misoperation, and potential safety hazards are further generated. In addition, because the unlocking clutch mechanism is arranged in front, if the front panel is pried and damaged by people, the unlocking clutch mechanism can be directly unlocked even if the anti-prizing circuit gives out an alarm prompt, and certain potential safety hazards exist.
Therefore, it is necessary to design a new door lock to improve the anti-tesla coil interference capability and the anti-prying lock capability, thereby improving the safety of the door lock.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a door lock with high safety and a working method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the door lock with high safety comprises a front control board, a rear control board and a rear clutch, wherein the rear clutch comprises a first power source and a clutch body connected with a lock body, the first power source is connected with the clutch body, and a first control chip U1, an information input unit and a first serial communication interface are arranged on the front control board; the rear control panel is provided with a second control chip U2, an ID key unit, a second serial communication interface and a first driving unit; the first serial communication interface is connected with the second serial communication interface; the ID key unit is used for matching the ID information of the front control board with the ID information of the rear control board, transmitting and storing the ID information of the front control board in the second control chip U2, and transmitting and storing the ID information of the rear control board in the first control chip U1; the information input unit is used for acquiring unlocking information; the first control chip U1 is used for receiving unlocking information, mixing and encrypting the unlocking information with the ID information of the front control board and the ID information of the rear control board to form an encrypted signal; the first serial communication interface is used for transmitting encrypted signals; the second serial communication interface is used for receiving the encrypted signal transmitted by the first serial communication interface and transmitting the encrypted signal to the second control chip U2; the second control chip U2 is used for receiving the encryption signal, decrypting the encryption signal to obtain the ID information of the front control board and the ID information of the rear control board, comparing the ID information of the front control board and the ID information of the rear control board with the ID information stored in the second control chip U2, and outputting a control signal according to the comparison result; the first driving unit is used for driving the first power source to work or stop working according to the control signal.
The further technical scheme is as follows: the first serial communication interface is connected with the second serial communication interface through a serial data line.
The further technical scheme is as follows: the rear clutch further comprises a second power source, the second power source is connected with the clutch body, a Bluetooth unlocking unit and a second driving unit are further arranged on the rear control board, the Bluetooth unlocking unit is used for receiving Bluetooth unlocking information of the mobile terminal, outputting the Bluetooth unlocking information to the second driving unit, and the second driving unit drives the second power source to work or stops working.
The further technical scheme is as follows: the Bluetooth unlocking unit comprises a Bluetooth antenna, a Bluetooth chip U3 and a second power supply unit, wherein the Bluetooth antenna is used for receiving Bluetooth unlocking information of the mobile terminal; the Bluetooth chip U3 is used for converting Bluetooth unlocking information into Bluetooth control signals and transmitting the Bluetooth control signals to the second driving unit; the second power supply unit is used for providing power for the Bluetooth chip U3 and the second driving unit.
The further technical scheme is as follows: the rear control board is provided with a first power supply unit, and the first power supply unit is used for providing power for the second control chip U2, the ID key unit, the second serial communication interface, the first driving unit, the first control chip U1, the information input unit, the ID key unit and the first serial communication interface.
The further technical scheme is as follows: the model of the first control chip U1 comprises STM32F091VC.
The further technical scheme is as follows: the information input unit comprises at least one of a key module, a wireless communication module, a biological characteristic identification module and a card swiping module.
The further technical scheme is as follows: the front control board is also provided with a first memory chip U5, a display unit and a prompt unit, and the first memory chip U5, the display unit and the prompt unit are respectively connected with the first control chip U1.
The further technical scheme is as follows: and a temperature sensor is arranged on the rear control board and is connected with the second control chip U2.
The invention also provides a working method of the door lock with high safety, which comprises the following steps:
the ID key unit is used for matching the ID information of the front control panel with the ID information of the rear control panel, the ID information of the front control panel is transmitted and stored in the second control chip U2, and the ID information of the rear control panel is transmitted and stored in the first control chip U1;
the information input unit acquires unlocking information;
the first control chip U1 receives unlocking information, mixes and encrypts the unlocking information with the ID information of the front control board and the ID information of the rear control board to form an encrypted signal, and transmits the encrypted signal through a first serial communication interface;
the second serial communication interface receives the encrypted signal transmitted by the first serial communication interface and transmits the encrypted signal to the second control chip U2;
the second control chip U2 receives the encrypted signal, decrypts the encrypted signal to obtain the ID information of the front control board and the ID information of the rear control board, compares the ID information of the front control board and the ID information of the rear control board with the ID information stored in the second control chip U2, and outputs a control signal according to the comparison result;
the first driving unit drives the first power source to work or stop working according to the control signal.
Compared with the prior art, the invention has the beneficial effects that: according to the intelligent lock unlocking device, the front control board, the rear control board and the rear clutch are arranged separately, the ID information of the front control board and the ID information of the rear control board are paired firstly, the unlocking information is obtained by the first control chip U1, the ID information of the front control board and the ID information of the rear control board are added to carry out encryption processing on the unlocking information to form an encryption signal, the encryption signal is transmitted to the second control chip U2 through the first serial communication interface, the serial data line and the second serial communication interface, the comparison is carried out by the second control chip U2, the first driving unit is controlled to drive the first power source to work or stop working according to the comparison result, the hidden danger of unlocking caused by interference of a Tesla coil is avoided after the unlocking information is encrypted, the unlocking unit is independently arranged, the Bluetooth unlocking unit is matched with the second power source and the second driving unit, intelligent unlocking under the condition that the front control board is damaged is achieved, and accordingly the safety of the intelligent door lock is improved.
The invention is further described below with reference to the drawings and specific embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a door lock with high security according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a front control board of a door lock with high security according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a rear control board according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a bluetooth unlocking unit according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As shown in specific embodiments of fig. 1 to 4, the door lock with high security provided in this embodiment may be applied to intelligent door locking such as electronic door locks, so as to improve anti-tesla coil interference capability and anti-picking lock capability, and further improve security of the door lock.
Referring to fig. 1, fig. 1 is a schematic block diagram of a door lock with high security provided in this embodiment, as shown in fig. 1, the door lock with high security includes a front control board 1, a rear control board 2, and a rear clutch 3, the rear clutch 3 includes a first power source 31 and a clutch body 33 connected with a lock body, the first power source 31 is connected with the clutch body 33, and a first control chip U1, an information input unit 12, and a first serial communication interface 13 are provided on the front control board 1; the rear control board 2 is provided with a second control chip U2, an ID key unit 23, a second serial communication interface 22 and a first driving unit 24; the first serial communication interface 13 is connected with the second serial communication interface 22; an ID key unit 23, configured to pair the ID information of the front control board 1 with the ID information of the rear control board 2, transmit and store the ID information of the front control board 1 to the second control chip U2, and transmit and store the ID information of the rear control board 2 to the first control chip U1; the information input unit 12 is used for acquiring unlocking information; the first control chip U1 is used for receiving unlocking information, mixing and encrypting the unlocking information with the ID information of the front control board 1 and the ID information of the rear control board 2 to form an encrypted signal; the first serial communication interface 13 is configured to transmit an encrypted signal; the second serial communication interface 22 is configured to receive the encrypted signal transmitted by the first serial communication interface 13, and transmit the encrypted signal to the second control chip U2; the second control chip U2 is used for receiving the encrypted signal, decrypting the encrypted signal to obtain the ID information of the front control board 1 and the ID information of the rear control board 2, comparing the ID information of the front control board 1 and the ID information of the rear control board 2 with the ID information stored in the second control chip U2, and outputting a control signal according to the comparison result; the first driving unit 24 is used for driving the first power source 31 to work or stop working according to the control signal.
In an embodiment, the first serial communication interface 13 and the second serial communication interface 22 are connected through a serial data line, so as to minimize (only 4) serial cables between the outdoor front control board 1 and the indoor rear control board 2 of the door lock, keep transmission information secret, and prevent the rear control board 2 from being illegally unlocked from the outside of the door or cause the door lock to lose the working capacity completely by damaging the indoor power supply unit.
In other embodiments, the first serial communication interface 13 and the second serial communication interface 22 are implemented by using an infrared transceiver, and may be implemented by wireless transmission, not limited to connection via a serial data line.
Specifically, each front control board 1 or rear control board 2 has a unique ID number, which is similar to the identification function of an identification card number, and is independently arranged when manufacturing the front and rear panels. The ID key unit 23 is a button, and is mounted on the rear control board 2, the front and rear control boards 2 are not provided with ID pairing buttons, the ID key unit 23 is used for performing ID number pairing after the front control board 1 and the rear control board 2 are mounted on site, when the door lock is mounted, i.e. after a front control board 1 and a rear control board 2 are mounted on the same door, the power supply is connected, the ID key unit 23 is pressed, the rear control board 2 receives ID information (i.e. ID number) of the rear control board 2 to the front control board 1 through a first serial communication and a second serial communication, the front control board 1 receives ID information to be stored, the first control chip U1 of the front control board 1 receives ID information of the front control board 1 to the rear control board 2 through the first serial communication and the second serial communication, and the rear control board 2 receives ID information to be stored; when in unlocking operation, the front control board 1 transmits unlocking information, encrypts own ID information and stored ID information of the rear control board 2 together and sends the encrypted ID information to the rear control board 2; after the decryption of the rear control board 2, whether the received ID information of the front control board 1 and the rear control board 2 is correct or not is compared, whether the subsequent unlocking operation is carried out or not is determined, and the effect of mutually locking the ID information of the front control board 1 and the rear panel is improved, so that the transmission safety is improved.
For example, if someone removes the front control board 1 of the same type door lock on his own door, replaces the front control board 1 of the same type on the other door of the other person, inputs unlocking information with his own password or with his own fingerprint on the front control board 1, and since the ID key unit 23 is on the rear panel in the other person's door, pairing of ID information cannot be performed, even if the unlocking information of the front control board 1 is correct, since the ID information of the front control board 1 and the rear control board 2 are not paired, the door cannot be opened, thereby improving the security of the door lock.
The first serial communication interface 13 and the second serial communication interface 22 can convert the signal sent by the first control chip U1 into a signal suitable for transmitting a serial data line, or convert the signal transmitted by the serial data line into a signal suitable for receiving by the second control chip U2, where the serial data line may be an electric wire or an optical fiber or other transmission medium suitable for serial communication.
The clutch is arranged at the rear and is separated from the front control board 1 and the rear control board 2, so that the safety problem that the front control board 1 can be unlocked when pried open can be reduced.
The ID key unit 23 is adopted to pair the ID of each door lock, so that the safety of the unlocking process can be improved; after the current control panel 1 and the back control panel 2 are installed in a matched mode, after the door lock is electrified, the ID key unit 23 of the back control panel 2 is operated, ID number pairing operation is carried out on the front control panel 1 and the back main control panel, after the pairing is successful, the other front control panel 1 with the same type is replaced, as ID number pairing operation is not carried out, an encrypted signal transmitted to the back control panel 2 through a serial data line is not accepted because of unpaired ID numbers of the front control panel 1, and then the back control panel 2 refuses to carry out next operation and cannot unlock the door lock, so that the safety of the door lock is improved.
Electromagnetic pulse interference emitted by the Tesla coil can destroy unlocking information of the front control board 1, and can destroy serial communication data and ID numbers after data encryption between the front control board 1 and the rear control board 2, but the destroyed encrypted data or ID numbers are decrypted to obtain wrong information or ID numbers, and the rear control board 2 cannot unlock, so that the anti-Tesla coil interference capability of the door lock is improved.
The first control chip U1 of the front control board 1 resets after power-on reset or crash, and can not send encrypted data to the rear control board 2, and the second control chip U2 of the rear control board 2 resets automatically after power-on reset or crash, and does not perform unlocking operation, so that the condition that the control chip causes crash reset and causes misoperation of the lock is prevented, and the anti-tesla coil interference capability of the door lock is improved.
In an embodiment, the rear clutch 3 further includes a second power source 32, the second power source 32 is connected to the clutch body 33, the rear control board 2 is further provided with a bluetooth unlocking unit 25 and a second driving unit 26, the bluetooth unlocking unit 25 is configured to receive bluetooth unlocking information of the mobile terminal, output the bluetooth unlocking information to the second driving unit 26, and the second driving unit 26 drives the second power source 32 to work or stops working.
When the front panel is pried to cause the damage of the front control panel 1, or the power supplies of the front control panel 1 and the rear control panel 2 are not powered, the door lock cannot be normally unlocked, bluetooth unlocking information can be sent to the Bluetooth unlocking unit 25 which is independently powered through the mobile terminal, the Bluetooth unlocking unit 25 controls the second driving unit 26 to drive the second power source 32 to work or stop working, and the rear clutch 3 is controlled to unlock, so that the novel door lock is practical and convenient.
In an embodiment, the bluetooth unlocking unit 25 includes a bluetooth antenna, a bluetooth chip U3, and a second power supply unit 27, where the bluetooth antenna is configured to receive bluetooth unlocking information of the mobile terminal; the bluetooth chip U3 is configured to convert bluetooth unlocking information into a bluetooth control signal, and transmit the bluetooth control signal to the second driving unit 26; the second power supply unit 27 is configured to provide power to the bluetooth chip U3 and the second driving unit 26.
Specifically, the types of bluetooth chips U3 described above include, but are not limited to, CC2640R2.
The Bluetooth unlocking unit 25 is powered by the second power supply unit 27 independent of the front control board 1 and the rear control board 2, is used for receiving near-field Bluetooth unlocking information of the APP of the mobile terminal, converting the Bluetooth unlocking information and outputting Bluetooth control signals to the second driving unit 26, and the second driving unit 26 drives the second power source 32 to work or stops working.
In order to improve the stability of the power supply of the bluetooth chip U3, a first voltage stabilizing chip U7 is connected between the second power unit 27 and the bluetooth chip U3, and the type of the first voltage stabilizing chip U7 includes, but is not limited to, HT7333.
Under the condition that the front control panel 1 is prized and damaged, the rear clutch 3 cannot be operated to unlock, and the Bluetooth unlocking unit 25 which is independently powered can only work through the operation of the mobile terminal, so that the unlocking process is completed, the anti-prizing unlocking capability is improved, the door lock can be ensured to normally open, and the anti-theft safety performance is improved.
In an embodiment, the rear control board 2 may further be provided with a radio frequency unlocking unit, and the radio frequency unlocking unit sends unlocking information by using a radio frequency principle to control the second driving unit 26 to drive the second power source 32 to work or stop working, so that the rear control board 1 can be normally unlocked even if the front control board 1 is pried and damaged.
In the present embodiment, the types of the first control chip U1 described above include, but are not limited to, STM32F091VC.
In an embodiment, the information input unit 12 includes a key module, a wireless communication module, a fingerprint module and a card swiping module, and in this embodiment, the wireless communication module includes, but is not limited to, a ZigBee module, and the key input password mode, the fingerprint unlocking mode, the card swiping mode and the ZigBee wireless unlocking mode can be used for unlocking.
In an embodiment, the information input unit 12 may further include a face recognition module, and the unlocking is performed in a face recognition mode, so that the unlocking security may be improved.
In an embodiment, the front control board 1 is further provided with a first memory chip U5, a display unit 14, and a prompting unit 11, and the first memory chip U5, the display unit 14, and the prompting unit 11 are respectively connected to the first control chip U1.
The first memory chip U5 may be used to store face information having unlocking authority, ID number of the door lock, administrator authority setting, and the like.
In the present embodiment, the types of the first memory chip U5 described above include, but are not limited to, W25Q64.
In this embodiment, the display unit 14 includes, but is not limited to, an OLED display module, an LCD display screen, etc., so as to display text as prompt information.
In this embodiment, the prompting unit 11 includes, but is not limited to, a speaker, an alarm, an indicator, etc., so as to be used as a warning or an alarm for opening the door lock in an unspecified manner, thereby improving the safety of the door lock.
In an embodiment, the rear control board 2 is provided with a first power unit 21, and the first power unit 21 is configured to provide power for the second control chip U2, the ID key unit 23, the second serial communication interface 22, the first driving unit 24, the first control chip U1, the information input unit 12, the ID key unit 23, and the first serial communication interface 13.
In the present embodiment, the model of the second control chip U2 includes, but is not limited to, STM32F091VC.
In an embodiment, in order to improve the stability of the power supply of the second control chip U2 during operation, a second voltage stabilizing chip U6 is connected between the second control chip U2 and the first power unit 21, and the model of the second voltage stabilizing chip U6 includes, but is not limited to, HT7333.
The Vout terminal pin of the second voltage stabilizing chip U6 is connected with the Vdd terminal pin of the first control chip U1, and the GND terminal pin of the second voltage stabilizing chip U6 is connected with the GND terminal pin of the first control chip U1, so that the front control board 1 and the rear control board 2 are powered by the same group of power supplies.
The second power supply unit 27 and the first power supply unit 21 are each a battery pack that supplies +6v voltage.
Different power supply units and different voltage stabilizing chips are arranged for different chips, so that the mutual interference of the chips through power supplies can be avoided, and the stability and the safety of the door lock are improved.
A filter capacitor C2 and a filter capacitor C3 with one end grounded are connected between the second voltage stabilizing chip U6 and the first control chip U1, so as to improve the stability of the voltage of the first control chip U1 during operation.
Of course, in other embodiments, a pi-type filter circuit is connected between the second voltage stabilizing chip U6 and the first control chip U1, so as to improve the stability of the voltage of the first control chip U1 during operation.
Preferably, the rear control board 2 is further provided with a second memory chip U4 for storing information such as an ID number of the door lock.
In the present embodiment, the above-mentioned model of the second memory chip U4 includes, but is not limited to, 24C512.
In one embodiment, the information input unit 12 includes at least one of a key module, a wireless communication module, a biometric identification module, and a card swiping module, wherein the biometric identification module includes, but is not limited to, a fingerprint module and a face recognition module; the key module is operated to obtain a group of data (the group of data is commonly called a password), the card swiping module adopts an RFID reading module, the card number of the RFID card and other data are obtained, and a wireless signal received by the wireless communication module can be converted into a series of data.
The first control chip U1 of the front control board 1 acquires unlocking codes or information from the key module, the wireless communication module, the fingerprint module and the card swiping module, adds the ID number of the front control board 1 and the ID number of the rear control board 2 to the obtained unlocking codes or information, and after data encryption processing, the unlocking codes or information is sent by the first serial communication interface 13 and transmitted to the second serial communication interface 22 of the rear control board 2 through a serial data line, and corresponding acousto-optic prompt and display are set according to the state of the door lock; the second control chip U2 of the rear control board 2 receives the encrypted data transmitted by the serial data line through the second serial communication interface 22, obtains the ID number of the front control board 1 and the ID number of the rear control board 2, and the unlocking password or information after decryption operation, compares and verifies the currently received ID number of the front control board 1 and the currently received ID number of the rear control board 2, verifies the input unlocking password or information after confirming the correctness, checks the correctness, and sends out a control signal after confirming the correctness, and controls the first driving unit 24 to drive the first power source 31 to work so as to control the rear clutch 3 to perform unlocking operation; the unlocking input information and unlocking information verification unlocking operation of the door lock are respectively completed by the front control board 1 and the rear control board 2, after data encryption is carried out on information between the front control board 1 and the rear control board 2, the information is exchanged with the second serial communication interface 22 through the first serial communication interface 13, and the safety hidden danger of abnormal unlocking caused by tesla coil interference is solved by matching with the double-motor independent rear clutch 3, so that the safety performance of electromagnetic interference resistance of the door lock is improved.
In an embodiment, the rear control board 2 is provided with a temperature sensor 40, the temperature sensor 40 is located outside the rear control board 2 so as to detect the external temperature, the temperature sensor 40 is connected with the second control chip U2, once the internal temperature of the door lock reaches +65°, the temperature sensor 40 transmits the detected temperature signal to the second control chip U2, the second control chip U2 drives the first driving unit 24 to operate, the first power source 31 starts to operate under the driving of the first driving unit 24, and the door lock is automatically opened in an emergency, so as to protect the personnel safety.
In an embodiment, the clutch body 33 includes a housing, a magnetic driving ring, a conduit, and a driving mechanism, wherein the magnetic driving ring, the conduit, and the driving mechanism are disposed in the housing, the magnetic driving ring is sleeved on an outer surface of the conduit, the conduit is connected to the driving mechanism, and the driving mechanism is connected to the first power source 31 and the second power source 32 respectively.
In addition, the driving mechanism comprises a first gear, a second gear and a third gear, the first gear is connected with the first power source 31, the second gear is connected with the second power source 32, the second gear and the first gear are respectively meshed with the third gear, the third gear is sleeved on the outer surface of the guide pipe, the magnetic driving ring is sleeved on the outer surface of the guide pipe through a guide pipe thread sleeve, and the guide pipe is embedded with an inner magnetic ring. The first power source 31 can drive the first gear to rotate so as to drive the whole clutch body 33 to correspondingly operate to unlock the door lock, and the second power source 32 can drive the second gear to rotate so as to drive the whole clutch body 33 to correspondingly operate to unlock the door lock.
In an embodiment, a clutch sliding sleeve is disposed between the inner magnetic ring and the guide pipe to realize clutch engagement.
According to the door lock with high safety, the front control board 1, the rear control board 2 and the rear clutch 3 are arranged separately, the ID information of the front control board 1 and the ID information of the rear control board 2 are paired firstly, the first control chip U1 acquires unlocking information, then the ID information of the front control board 1 and the ID information of the rear control board 2 are added to encrypt the unlocking information to form encrypted signals, the encrypted signals are transmitted to the second control chip U2 through the first serial communication interface 13, the serial data line and the second serial communication interface 22, the second control chip U2 is used for comparing, the first driving unit 24 is controlled to drive the first power source 31 to work or stop working according to the comparison result, the unlocking information is encrypted and then hidden danger of unlocking caused by interference of a Tesla coil is avoided, and the Bluetooth unlocking unit 25 is independently arranged to cooperate with the second power source 32 and the second driving unit 26, so that the intelligent door lock is realized under the condition that the front control board 1 is damaged, the anti-Tesla coil interference capability and the anti-pry locking capability are improved, and the door lock safety is further improved.
In an embodiment, there is also provided a method of operating a door lock with high security, the method comprising:
the ID key unit 23 which is partially exposed in the door lock is utilized to pair the ID information of the front control panel 1 with the ID information of the rear control panel 2, the ID information of the front control panel 1 is transmitted and stored in the second control chip U2, the ID information of the rear control panel 2 is transmitted and stored in the first control chip U1, and the door lock front control panel 1 and the rear control panel 2 are paired one by one after being installed, so that the illegal replacement prevention function of the door lock outdoor front control panel is realized;
the information input unit 12 acquires unlocking information;
the first control chip U1 receives unlocking information, mixes and encrypts the unlocking information with the ID information of the front control board 1 and the ID information of the rear control board 2 to form an encrypted signal, and transmits the encrypted signal through the first serial communication interface 13;
the second serial communication interface 22 receives the encrypted signal transmitted by the first serial communication interface 13 and transmits the encrypted signal to the second control chip U2;
the second control chip U2 receives the encrypted signal, decrypts the encrypted signal to obtain the ID information of the front control board 1 and the ID information of the rear control board 2, compares the ID information of the front control board 1 and the ID information of the rear control board 2 with the ID information stored in the second control chip U2, and outputs a control signal according to the comparison result;
the first driving unit 24 drives the first power source 31 to operate or stops operating according to the control signal.
It should be noted that, as a person skilled in the art can clearly understand, the specific implementation process of the working method of the door lock with high security may refer to the corresponding description in the foregoing embodiment of the door lock with high security, and for convenience and brevity of description, the description is omitted here.
The foregoing examples are provided to further illustrate the technical contents of the present invention for the convenience of the reader, but are not intended to limit the embodiments of the present invention thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. The door lock with high safety is characterized by comprising a front control board, a rear control board and a rear clutch, wherein the rear clutch comprises a first power source and a clutch body connected with a lock body, the first power source is connected with the clutch body, and a first control chip U1, an information input unit and a first serial communication interface are arranged on the front control board; the rear control panel is provided with a second control chip U2, an ID key unit, a second serial communication interface and a first driving unit; the first serial communication interface is connected with the second serial communication interface; the ID key unit is used for matching the ID information of the front control board with the ID information of the rear control board, transmitting and storing the ID information of the front control board in the second control chip U2, and transmitting and storing the ID information of the rear control board in the first control chip U1; the information input unit is used for acquiring unlocking information; the first control chip U1 is used for receiving unlocking information, mixing and encrypting the unlocking information with the ID information of the front control board and the ID information of the rear control board to form an encrypted signal; the first serial communication interface is used for transmitting encrypted signals; the second serial communication interface is used for receiving the encrypted signal transmitted by the first serial communication interface and transmitting the encrypted signal to the second control chip U2; the second control chip U2 is used for receiving the encryption signal, decrypting the encryption signal to obtain the ID information of the front control board and the ID information of the rear control board, comparing the ID information of the front control board and the ID information of the rear control board with the ID information stored in the second control chip U2, and outputting a control signal according to the comparison result; the first driving unit is used for driving the first power source to work or stop working according to the control signal;
the first serial communication interface is connected with the second serial communication interface through a serial data line; or, an infrared transceiver is adopted between the first serial communication interface and the second serial communication interface to realize serial data transmission;
each front control board or each rear control board is provided with a unique ID number, has the identification function similar to the ID card number and is independently arranged when the front control board and the rear control board are manufactured; the ID key unit is a button and is arranged on the rear control board, the front control board is not provided with the ID key unit, the ID key unit is used for carrying out ID number pairing after the front control board and the rear control board are installed on site, when the door lock is installed, namely after the front control board and the rear control board are installed on the same door, the ID key unit is pressed after the door lock is connected with a power supply, the rear control board receives ID information of the rear control board to the front control board through a first serial communication and a second serial communication, the front control board receives the ID information to be stored, the first control chip U1 of the front control board sends the ID information of the front control board to the rear control board through a first serial communication interface and a second serial communication interface, and the rear control board also stores the ID information after receiving the ID information; when the unlocking operation is performed, the front control board transmits unlocking information, simultaneously encrypts own ID information and stored ID information of the rear control board together and sends the encrypted ID information to the rear control board; after the decryption of the rear control panel, whether the received ID information of the front control panel and the rear control panel is correct or not is compared, whether the subsequent unlocking operation is carried out or not is determined, and the front control panel and the rear control panel have the function of mutually locking the ID information;
the rear clutch further comprises a second power source, the second power source is connected with the clutch body, a Bluetooth unlocking unit and a second driving unit are further arranged on the rear control panel, the Bluetooth unlocking unit is used for receiving Bluetooth unlocking information of the mobile terminal, outputting the Bluetooth unlocking information to the second driving unit, and the second driving unit drives the second power source to work or stops working;
the Bluetooth unlocking unit comprises a Bluetooth antenna, a Bluetooth chip U3 and a second power supply unit, wherein the Bluetooth antenna is used for receiving Bluetooth unlocking information of the mobile terminal; the Bluetooth chip U3 is used for converting Bluetooth unlocking information into Bluetooth control signals and transmitting the Bluetooth control signals to the second driving unit; the second power supply unit is used for providing power for the Bluetooth chip U3 and the second driving unit;
the rear control board is provided with a first power supply unit, and the first power supply unit is used for providing power for the second control chip U2, the ID key unit, the second serial communication interface, the first driving unit, the first control chip U1, the information input unit, the ID key unit and the first serial communication interface.
2. The door lock with high security according to claim 1, wherein the model of the first control chip U1 comprises STM32F091VC.
3. The door lock with high security according to claim 2, wherein the information input unit comprises at least one of a key module, a wireless communication module, a biometric module, and a swipe module.
4. The door lock with high safety according to claim 3, wherein the front control board is further provided with a first memory chip U5, a display unit and a prompt unit, and the first memory chip U5, the display unit and the prompt unit are respectively connected with the first control chip U1.
5. The door lock with high safety according to claim 1, wherein a temperature sensor is provided on the rear control board, and the temperature sensor is connected to the second control chip U2.
6. A method of operating a door lock with high security using the door lock with high security of any one of claims 1 to 5, characterized in that the method comprises:
the ID key unit is used for matching the ID information of the front control panel with the ID information of the rear control panel, the ID information of the front control panel is transmitted and stored in the second control chip U2, and the ID information of the rear control panel is transmitted and stored in the first control chip U1;
the information input unit acquires unlocking information;
the first control chip U1 receives unlocking information, mixes and encrypts the unlocking information with the ID information of the front control board and the ID information of the rear control board to form an encrypted signal, and transmits the encrypted signal through a first serial communication interface;
the second serial communication interface receives the encrypted signal transmitted by the first serial communication interface and transmits the encrypted signal to the second control chip U2;
the second control chip U2 receives the encrypted signal, decrypts the encrypted signal to obtain the ID information of the front control board and the ID information of the rear control board, compares the ID information of the front control board and the ID information of the rear control board with the ID information stored in the second control chip U2, and outputs a control signal according to the comparison result;
the first driving unit drives the first power source to work or stop working according to the control signal.
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| CN201811267969.XA CN109184361B (en) | 2018-10-29 | 2018-10-29 | Door lock with high safety and working method thereof |
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| CN201811267969.XA CN109184361B (en) | 2018-10-29 | 2018-10-29 | Door lock with high safety and working method thereof |
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| CN109184361B true CN109184361B (en) | 2023-09-26 |
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| CN110349304A (en) * | 2019-06-15 | 2019-10-18 | 广东必达保安系统有限公司 | A kind of networking add-on module and its operating method with electronic lock communication |
| CN110499957A (en) * | 2019-08-21 | 2019-11-26 | 中山臣家智能科技有限公司 | Safer smart lock |
| CN112482897A (en) * | 2019-09-11 | 2021-03-12 | 云丁网络技术(北京)有限公司 | Communication method and intelligent door lock |
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