CN106761000A - The external control system of intelligent door lock and method - Google Patents

Abstract

The present invention relates to a kind of external control system of intelligent door lock and method.The external control system of the intelligent door lock is used for the folding of control machinery lock, and system includes：Connecting rod, external control device, wireless router, intelligent terminal, wherein, external control device connects door handle by connecting rod, and external control device is connected to wireless router by WIFI signal, and intelligent terminal is wirelessly connected to wireless router；Intelligent terminal sends control command to external control device by wireless router, and external control device controls door handle according to control command drive link.By implementing the present invention, it is not necessary to do any change to existing machinery door lock, it is only necessary to install an external control device additional by mechanical door lock, you can realize the intelligent management to door lock using the existing internet of family and intelligent terminal.

Description

Intelligent door lock external control system and method

technical field

The invention relates to the field of home security, and more specifically, to an external control system and method for an intelligent door lock.

Background technique

In people's daily life, it often occurs that they forget to bring the door lock key at home, or forget whether the door has been locked, or a visitor suddenly comes when the owner is not at home, but the visitor cannot enter the home in time, etc. Life is inconvenient.

At present, in the field of household door locks, electronic door locks have been gradually promoted, but they are currently expensive. At present, most families are using traditional mechanical door locks. If they are replaced directly, the old mechanical door locks need to be removed first, and then replaced. Some old-style door locks are more troublesome to remove. Considering that most of the installation holes of the previous door locks do not match the new locks, the anti-theft door needs to be refitted, which will cause damage to the overall appearance or function of the anti-theft door.

Therefore, how to transform the existing old-style door locks, so that the old-style mechanical door locks can use Internet technology, and realize intelligent management of the door locks on smart terminals such as smart phones and tablets, and the cost of transformation is relatively low, these seem very important. necessary.

Contents of the invention

The technical problem to be solved by the present invention is to provide an external control system and method for an intelligent door lock in view of the disadvantage of inconvenient use of the above-mentioned existing mechanical door locks in the prior art.

The technical solution adopted by the present invention to solve the technical problem is to construct an external control system for an intelligent door lock, which is used to control the door handle of the lock body to realize the opening and closing of the door lock. The system includes: a connecting rod, An external control device, a wireless router, and an intelligent terminal, wherein the external control device is connected to the door handle through a connecting rod, the external control device is connected to the wireless router through a WIFI signal, and the intelligent terminal is connected to the wireless router through a wireless connected to the wireless router in a manner;

The smart terminal sends a control command to the external control device through the wireless router, and the external control device drives the connecting rod to control the door handle according to the control command;

The external control device includes: a connecting rod driving device, a control circuit, a WIFI module, a power supply module, an infrared sensor, and a camera, wherein the connecting rod driving device is connected to the connecting rod, and the control circuit is respectively connected to the connecting rods. Rod driving device, WIFI module, power supply module, infrared sensor, camera;

The WIFI module is used to connect to the wireless router, and receive a control command sent by the wireless router or upload detection data to the wireless router; the control circuit controls the connecting rod driving device according to the control command, and then Drive the connecting rod to control the door handle; the power supply module is used to provide electric energy for the external control device; the camera is used to collect information outside the door; the infrared sensor is used to monitor the switch of the door lock in real time state.

Preferably, in the smart door lock external control system according to the present invention, the connecting rod driving device is an electromagnetic connecting rod driver, and the electromagnetic connecting rod driver includes: an electromagnetic coil, an armature driven by the electromagnetic coil, and a connecting rod driver. Rod return spring, the armature is connected to the connecting rod, the electromagnetic coil attracts the armature to move according to the control command, the armature drives the connecting rod to move, and the connecting rod drives the door handle to open the door ;

The connecting rod return spring is connected with the connecting rod, and is used to reset the armature and the connecting rod after the door is closed.

Preferably, in the smart door lock external control system according to the present invention, the connecting rod driving device is a motor-type connecting rod driver, and the motor-type connecting rod driver includes: a driving motor, a motor driving circuit, and a gear assembly. The gear assembly includes a gear mounted on the drive motor bearing, and a transmission rod matched with the gear, and the transmission rod is connected to the connecting rod;

The motor drive circuit drives the drive motor to rotate forward according to the control command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and the connecting rod drives the door handle to open the door ;

The motor driving circuit drives the driving motor to reversely rotate according to the reset command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and the connecting rod drives the door handle to close the door.

Preferably, in the smart door lock external control system of the present invention, the power supply module includes: a mains power supply circuit and a battery pack power supply circuit, and the mains power supply circuit is used as the external control system when the mains power is normal. The device provides electrical energy;

When there is no commercial power, the battery pack power supply circuit is used to provide electric energy for the external control device.

Preferably, in the external control system for smart door locks according to the present invention, the power supply module further includes: a switching circuit and a power monitoring circuit. The external control device provides electric energy;

The power monitoring circuit is used to detect the remaining power of the battery pack, and when the remaining power is less than a safe value, an alarm message is sent, and the alarm message is sent to the smart terminal through the wireless router.

Preferably, in the external control system for smart door locks according to the present invention, the external control device further includes a distance sensor, which is connected to the control circuit and installed on the outside of the door for sensing the distance in front of the door. Whether there are people within the preset distance;

When the distance sensor detects that there is a person within the preset distance in front of the door, the camera is started to collect information outside the door, and the collected information is transmitted to the smart terminal through the wireless router.

Preferably, in the external control system for smart door locks according to the present invention, the external control device further includes a state detection circuit, the infrared sensor is connected to the control circuit through the state detection circuit, and the state detection circuit is based on The infrared sensor monitors the switch state of the door lock to judge the state of the door, and transmits the switch state of the door to the smart terminal through the wireless router.

Preferably, in the smart door lock external control system according to the present invention, the wireless router includes a terminal detection unit, and the terminal detection unit detects the physical address of the smart terminal connected to the wireless router, and is a legitimate smart terminal Assign and lock a unique IP address.

Preferably, in the external control system for smart door locks according to the present invention, the external control device further includes a password input module connected to the control circuit, and the password input module is installed outside the door;

The registered legal smart terminal sends the unlock password to the unregistered illegal smart terminal and the external control device, the illegal smart terminal inputs the unlock password in the password input module, and the control circuit verifies that the input unlock password is consistent with the legal one. If the unlocking password sent by the smart terminal matches, the connecting rod driving device is driven to drive the connecting rod to open the door.

In addition, the present invention also discloses an external control method for an intelligent door lock, the method is used in the above-mentioned external control system for an intelligent door lock, and the method includes the following steps:

The smart terminal is connected to the wireless router, registered as a legal smart terminal through the APP installed on the smart terminal, and the external control device is connected to the wireless router through wireless means;

The legal mobile terminal sends a control command to open the door through the wireless router, and the control command is sent to the external control device through the wireless router;

The WIFI module of the external control device receives the control command, the control circuit of the external control device drives the connecting rod driving device according to the control command, and the connecting rod driving device drives the connecting rod to move, and will be connected with The door handle connected by the connecting rod is opened;

The infrared sensor of the external control device detects the switch state of the door lock, transmits the switch state of the door lock to the smart terminal through a wireless router, and displays it on the smart terminal;

If the distance sensor of the external control device detects that there are people within the preset distance in front of the door, the camera is started to collect information outside the door, and the collected information is transmitted to the smart terminal through a wireless router;

After viewing the information collected by the camera on the smart terminal, the user edits and sends the unlock password to the unregistered illegal smart terminal and the external control device;

The illegal smart terminal inputs the unlock password in the password input module, and the control circuit verifies that the input unlock password matches the unlock password sent by the legitimate smart terminal, and drives the connecting rod driving device to drive the connecting rod to open the door. ;

The power monitoring circuit detects the remaining power of the battery pack, and sends an alarm message when the remaining power is less than a safe value, and the alarm message is sent to the smart terminal through the wireless router;

The switching circuit detects whether the commercial power is normal, and switches to the battery pack to provide electric energy for the external control device when there is no commercial power.

Implementing the intelligent door lock external control system and method of the present invention has the following beneficial effects: the intelligent door lock external control system is used to control the door handle of the lock body to realize the opening and closing of the door lock. The system includes: a connecting rod, An external control device, a wireless router, and an intelligent terminal, wherein the external control device is connected to the door handle through a connecting rod, the external control device is connected to the wireless router through a WIFI signal, and the intelligent terminal is connected to the wireless router through a wireless connected to the wireless router; the smart terminal sends a control command to the external control device through the wireless router, and the external control device drives the connecting rod to control the door handle according to the control command. By implementing the present invention, there is no need to make any changes to the existing mechanical door locks, only an external control device needs to be installed next to the door locks, and the existing Internet and intelligent terminals at home can be used to realize intelligent management of the door locks.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic structural view of an external control system for an intelligent door lock of the present invention;

Fig. 2 is a schematic flow chart of an external control method for an intelligent door lock according to the present invention.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an external control system for an intelligent door lock of the present invention.

The external control system of the intelligent door lock is used to control the door handle of the lock body to realize the opening and closing of the door lock. Although the shapes of door handles of different brands and designs are different, the unlocking methods are mostly rotary and pull-out. The external control system of the intelligent door lock of the present invention can drive the connecting rod to realize rotating the door handle or pulling the door handle to open the door. Preferably, the connecting rod is detachably installed on the door handle, and adopts a simple installation method to facilitate disassembly by the user. The present invention does not limit the connection method, as long as the connecting rod and the door handle can be fixedly connected.

Specifically, the external control system of the intelligent door lock includes: a connecting rod, an external control device, a wireless router, and an intelligent terminal, wherein,

The external control device is connected to the door handle through the connecting rod, the external control device is connected to the wireless router through the WIFI signal, and the smart terminal is connected to the wireless router through wireless. One end of the connecting rod is fixed on the door handle, and the other end is fixed on the connecting rod driving device of the external control device, and the connecting rod driving device realizes hard connection with the door handle through the connecting rod. Those skilled in the art should understand that the door lock needs to be unlocked by rotating the door handle, so a crankshaft is arranged between the connecting rod and the door handle, and the crankshaft converts the linear motion of the connecting rod into rotary motion; when the door lock needs to be pulled to open, the connecting rod directly It is connected with the door handle (lock bolt), and the door lock can be opened by pulling the door handle through the connecting rod.

The smart terminal sends a control command to the external control device through the wireless router, and the external control device drives the connecting rod to control the door handle according to the control command.

Preferably, the smart terminal includes, but is not limited to, a smart phone, a tablet computer, a notebook computer, a smart watch, and the like. An APP (application program) for controlling the external control device is installed on the smart terminal, and the user registers an account number and password through the APP to obtain control authority. The user sends control commands to the external control device through the APP, and checks the information sent by the external control device. Users can also call the camera through the APP to view the visitors outside the door in real time.

Further, the external control device includes: a connecting rod driving device, a control circuit, a WIFI module, a power supply module, an infrared sensor, a camera, a distance sensor, a state detection circuit, and a password input module, wherein the connecting rod driving device is connected to the connecting rod, and the control circuit Connect the connecting rod drive device, WIFI module, power supply module, infrared sensor and camera respectively. Each part is described below.

The WIFI module is used to connect to the wireless router, and receive control commands sent by the wireless router or upload detection data to the wireless router; the control circuit controls the connecting rod driving device according to the control commands, and then drives the connecting rod to control the door handle. The power supply module is used to provide electric energy for the external control device; the camera is used to collect information outside the door; the infrared sensor is used to monitor the switch status of the door lock in real time.

Preferably, the link driving device is an electromagnetic link driver or a motor link driver.

Specifically, the electromagnetic connecting rod driver includes: an electromagnetic coil, an armature driven by the electromagnetic coil, and a connecting rod return spring. The armature is connected to the connecting rod, and the electromagnetic coil attracts the armature to move according to the control command. The door handle opens the door; the link return spring is connected to the link to reset the armature and link after the door is closed.

Specifically, the motor-type link driver includes: a drive motor, a motor drive circuit, and a gear assembly. The gear assembly includes a gear mounted on the bearing of the drive motor, and a transmission rod that matches the gear. The transmission rod is designed with a gear, and the transmission rod is connected to the link. The unlocked and locked states are:

When unlocking: the motor drive circuit drives the drive motor to rotate forward according to the control command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and then the connecting rod drives the door handle to open the door.

When locking the door: the motor drive circuit drives the drive motor to rotate in reverse according to the reset command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and then the connecting rod drives the door handle to close the door.

Preferably, the connecting rod driving device is used in conjunction with the infrared sensor, and the moving distance of the connecting rod controlled by the connecting rod driving device is determined by the detection result of the infrared sensor. When the door lock is opened, the infrared sensor module detects the state of the door lock, and the connecting rod driving device drives the connecting rod to open the door lock. When the infrared sensor module detects that the door lock is fully opened, it will generate feedback information and transmit the feedback information To the control circuit, the control circuit stops driving the connecting rod driving device, the door lock no longer moves, and maintains the state.

Preferably, the power supply module of the intelligent door lock external control system of the present invention includes: a mains power supply circuit and a battery pack power supply circuit, and the mains power supply circuit is used to provide electric energy for the external control device when the mains power is normal.

When there is no commercial power, the battery pack power supply circuit is used to provide electric energy for the external control device.

Further, the power supply module also includes: a switching circuit and a power monitoring circuit. When the switching circuit detects that the mains power is abnormal, it switches to the battery pack power supply circuit to provide electric energy for the external control device;

The power monitoring circuit is used to detect the remaining power of the battery pack, and when the remaining power is less than the safe value, an alarm message is sent, and the alarm message is sent to the smart terminal through the wireless router to remind the user.

Preferably, the external control device also includes a distance sensor, which is connected to the control circuit and installed on the outside of the door for sensing whether there is a person within a preset distance in front of the door; the preset distance can be set as required, for example, when The preset distance is 0.5 meters. When the distance between someone and the door is less than 0.5, it is determined that there is someone in front of the door.

Further, the distance sensor senses that there are people within the preset distance in front of the door, and then sends a start signal to the control circuit, and the control circuit starts the camera to collect information outside the door according to the start signal, and transmits the collected information to the smart terminal through the wireless router . Preferably, the information collected outside the door is a picture or video. The user can check through the smart terminal to determine whether the visitor is allowed to enter the room. If so, the unlock password can be sent to the visitor, and the password can be entered through the password input module outside the door to enter the room. Preferably, the user can inform the visitor of the unlock password through telephone, text message, sound, and instant messaging tools.

Preferably, the external control device also includes a voice communication device, and the voice communication device is connected to the control circuit. When a user visits, touches the voice communication device or the distance sensor detects that someone is at the door, the control circuit is connected through the WIFI module and wireless The router is connected to the smart terminal and sends out visitor reminders. The smart terminal can enable the voice communication device to communicate with visitors. Preferably, while using the voice communication device, the user can also use the camera to view visitors through the camera.

Preferably, the external control device also includes a face recognition module and a storage module, and the face recognition module collects the image information of the visitor outside the door through the camera, and compares it with the stored data in the storage module to determine whether the visitor is in the visitor's list. Through identification, if the visitor is in the visitor list, the face recognition module sends a detection pass command to the control circuit, and the control circuit controls the movement of the connecting rod drive device to open the door lock. At the same time, the control circuit sends the visitor information to the wireless router through the WIFI module, and the wireless router forwards the visitor information to the smart terminal, and the smart terminal receives and displays the visitor information to inform the user of the arrival of the visitor and the specific information of the visitor, for example, through The avatar information and name of the visitor collected by the camera.

Preferably, the external control device further includes a password input module, which is connected to the control circuit, and the password input module is installed outside the door. The password input module can adopt a button type input module or a touch screen type input, and has a display screen for displaying the input unlock password.

Preferably, the aforementioned camera, voice communication device, and distance sensor can be integrated to save space.

The registered legal smart terminal sends the unlock password to the unregistered illegal smart terminal and the external control device. The illegal smart terminal enters the unlock password in the password input module, and the control circuit verifies that the input unlock password matches the unlock password sent by the legal smart terminal. Then drive the connecting rod driving device, and then drive the connecting rod to open the door.

Preferably, the unlock password is edited by the user himself, and the unlock password is a one-time password, which can only be used once and becomes invalid after unlocking, so as to prevent the door lock from being opened many times and improve security.

Preferably, the user can also open the door lock remotely through the network. The specific operation process is: connect the WIFI module of the external control device to the router, obtain the IP address and port, and map the IP address and port of the WIFI module on the wireless router , connect to the external network through the dynamic domain name of the wireless router. The user accesses the external control device through a smart terminal, such as a mobile phone, a notebook, etc., and sends a control command, and the control circuit of the external control device drives the connecting rod drive device according to the control command to open the door lock.

Preferably, the external control device also includes a state detection circuit, the infrared sensor is connected to the control circuit through the state detection circuit, and the state detection circuit judges the state of the door according to the infrared sensor monitoring the switch state of the door lock, and transmits the switch state of the door to the Intelligent Terminal.

Preferably, the wireless router of the intelligent door lock external control system of the present invention includes a terminal detection unit, which detects the physical address of the intelligent terminal connected to the wireless router, and assigns and locks a unique IP address for the legal intelligent terminal. An unregistered smart terminal cannot connect to the wireless router, or even if an unregistered smart terminal connects to the wireless router, it cannot send a control command to unlock.

Preferably, the external control device also includes an alarm device, which is connected to the control circuit. When the alarm device detects that the door lock is opened without receiving a control command sent by the user, it will send out an alarm message, such as flashing lights or an alarm sound. . At the same time, the alarm device sends alarm information to the wireless router through the WIFI module, and the wireless router sends the alarm information to the smart terminal. After receiving the alarm information, the smart terminal sends out ringing and vibration to prompt the user to deal with it.

Preferably, the external control device also includes an iris recognition device, which is connected to the control circuit for detecting the iris information of the user and the visitor, and judging whether the collected iris information is consistent with the iris information of the legal user or the visitor in the storage module. match. If the collected iris information matches the iris information of the legitimate user or visitor in the storage module, the iris recognition device sends a correct recognition instruction to the control circuit, and the control circuit drives the link drive device to move, and then unlocks.

In addition, the iris recognition device and other user identification devices can be linked and fortified, and the lock will only be unlocked when the user's identity information satisfies all the identity information at the same time. For example, if the iris control device and the smart terminal are linked to fortify, only when the iris recognition is correct and the smart terminal sends a control command, the external control device will unlock.

The external control device also includes a housing and a fixing hole. The control circuit, WIFI module, connecting rod drive device, power supply module, storage device, etc. are installed on the bottom plate. The bottom plate is provided with a fixing hole for fixing the external control device. holes to mount outboard controls to the door.

It can be understood that when the user does not carry the smart terminal or the smart terminal is damaged, the user can still unlock the lock with the key.

Fig. 2 is a schematic flow chart of an external control method for an intelligent door lock according to the present invention.

Specifically, this method is used in the above-mentioned external control system of the intelligent door lock, which is used to control the door handle of the lock body to realize the opening and closing of the door lock. Although the shapes of door handles of different brands and different designs are different, the unlocking method is mostly rotation type and pull type. The external control system of the intelligent door lock of the present invention can drive the connecting rod to realize rotating the door handle, or pull the door handle to open the door. The method comprises the steps of:

Step 101: the smart terminal is connected to the wireless router, registered as a legal smart terminal through the APP installed on the smart terminal, and the external control device is connected to the wireless router through wireless;

Step 102: the legal mobile terminal sends a control command to open the door through the wireless router, and the control command is sent to the external control device through the wireless router;

Step 103: The WIFI module of the external control device receives the control command, the control circuit of the external control device drives the connecting rod driving device according to the control command, the connecting rod driving device drives the connecting rod to move, and opens the door handle connected to the connecting rod;

Step 104: The infrared sensor of the external control device detects the switch state of the door lock, transmits the switch state of the door lock to the smart terminal through the wireless router, and displays it on the smart terminal;

If the distance sensor of the external control device detects that there are people within the preset distance in front of the door, the camera is started to collect information outside the door, and the collected information is transmitted to the smart terminal through the wireless router;

After viewing the information collected by the camera on the smart terminal, the user edits and sends the unlock password to the unregistered illegal smart terminal and external control device;

The illegal smart terminal inputs the unlock password in the password input module, and the control circuit verifies that the input unlock password matches the unlock password sent by the legitimate smart terminal, and then drives the connecting rod driving device to drive the connecting rod to open the door;

The power monitoring circuit detects the remaining power of the battery pack, and when the remaining power is less than the safe value, an alarm message is sent, and the alarm message is sent to the smart terminal through the wireless router;

The switching circuit detects whether the commercial power is normal, and switches to the battery pack to provide electric energy for the external control device when there is no commercial power.

Set the sleep time of the external control device. During the sleep time, the external control device does not work. At this time, the user needs to manually unlock.

Set the lock time of the external control device. During the lock time, except for the user who implements the lock, no other user can operate the external control device, and cannot open the door lock with the key.

Multiple identification devices are linked and fortified, and only when all the identification information is correct, the external control device drives the connecting rod to unlock.

By implementing the present invention, there is no need to make any changes to the existing mechanical door locks, only an external control device needs to be installed next to the door locks, and the existing Internet and intelligent terminals at home can be used to realize intelligent management of the door locks.

The above embodiments are only to illustrate the technical conception and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

1. An external control system for an intelligent door lock, the system is used to control the door handle of the lock body to open and close the door lock, it is characterized in that the system includes: a connecting rod, an external control device, a wireless router, An intelligent terminal, wherein the external control device is connected to the door handle through a connecting rod, the external control device is connected to the wireless router through a WIFI signal, and the intelligent terminal is wirelessly connected to the wireless router; The smart terminal sends a control command to the external control device through the wireless router, and the external control device drives the connecting rod to control the door handle according to the control command; The external control device includes: a connecting rod driving device, a control circuit, a WIFI module, a power supply module, an infrared sensor, and a camera, wherein the connecting rod driving device is connected to the connecting rod, and the control circuit is respectively connected to the connecting rods. Rod driving device, WIFI module, power supply module, infrared sensor, camera; The WIFI module is used to connect to the wireless router, and receive a control command sent by the wireless router or upload detection data to the wireless router; the control circuit controls the connecting rod driving device according to the control command, and then Drive the connecting rod to control the door handle; the power supply module is used to provide electric energy for the external control device; the camera is used to collect information outside the door; the infrared sensor is used to monitor the switch of the door lock in real time state. 2. The external control system for intelligent door locks according to claim 1, wherein the connecting rod driving device is an electromagnetic connecting rod driver, and the electromagnetic connecting rod driver includes: an electromagnetic coil driven by the electromagnetic coil The armature and the connecting rod return spring, the armature is connected to the connecting rod, the electromagnetic coil attracts the armature to move according to the control command, the armature drives the connecting rod to move, and the connecting rod drives the connecting rod to move the door handle to open the door; The connecting rod return spring is connected with the connecting rod, and is used to reset the armature and the connecting rod after the door is closed. 3. The external control system for intelligent door locks according to claim 1, wherein the connecting rod driving device is a motor-type connecting rod driver, and the motor-type connecting rod driver comprises: a driving motor, a motor driving circuit, a gear assembly, the gear assembly includes a gear mounted on the drive motor bearing, and a transmission rod matched with the gear, the transmission rod is connected to the connecting rod; The motor drive circuit drives the drive motor to rotate forward according to the control command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and the connecting rod drives the door handle to open the door ; The motor driving circuit drives the driving motor to reversely rotate according to the reset command, drives the transmission rod to move, the transmission rod drives the connecting rod to move, and the connecting rod drives the door handle to close the door. 4. The external control system for intelligent door locks according to claim 1, wherein the power supply module includes: a mains power supply circuit and a battery pack power supply circuit, and when the mains power is normal, the mains power supply circuit is used as The external control device provides electric energy; When there is no commercial power, the battery pack power supply circuit is used to provide electric energy for the external control device. 5. The external control system for smart door locks according to claim 4, wherein the power supply module further includes: a switching circuit and a power monitoring circuit, and the switching circuit detects that the mains power is abnormal, then switches to the The battery pack power supply circuit provides electric energy for the external control device; The power monitoring circuit is used to detect the remaining power of the battery pack, and when the remaining power is less than a safe value, an alarm message is sent, and the alarm message is sent to the smart terminal through the wireless router. 6. The external control system for intelligent door lock according to claim 1, characterized in that, the external control device further includes a distance sensor, the distance sensor is connected to the control circuit and installed on the outside of the door for Sensing whether there is a person within the preset distance in front of the door; When the distance sensor detects that there are people within the preset distance in front of the door, the camera is started to collect information outside the door, and the collected information is transmitted to the smart terminal through the wireless router. 7. The external control system for smart door locks according to claim 1, wherein the external control device further includes a state detection circuit, and the infrared sensor is connected to the control circuit through the state detection circuit, so that The state detection circuit monitors the switch state of the door lock according to the infrared sensor and judges the state of the door, and transmits the switch state of the door to the smart terminal through the wireless router. 8. The intelligent door lock external control system according to claim 1, wherein the wireless router includes a terminal detection unit, and the terminal detection unit detects the physical address of the intelligent terminal connected to the wireless router, and Assign and lock unique IP addresses for legitimate smart terminals. 9. The external control system for smart door locks according to claim 1, wherein the external control device further comprises a password input module, the password input module is connected to the control circuit, and the password input module installed outside the door; The registered legal smart terminal sends the unlock password to the unregistered illegal smart terminal and the external control device, the illegal smart terminal inputs the unlock password in the password input module, and the control circuit verifies that the input unlock password is consistent with the legal If the unlocking password sent by the smart terminal matches, the connecting rod driving device is driven to drive the connecting rod to open the door. 10. An external control method for an intelligent door lock, characterized in that the method is used in the external control system for an intelligent door lock according to any one of claims 1-9, and the method comprises the following steps: The smart terminal is connected to the wireless router, registered as a legal smart terminal through the APP installed on the smart terminal, and the external control device is connected to the wireless router through wireless means; The legal mobile terminal sends a control command to open the door through the wireless router, and the control command is sent to the external control device through the wireless router; The WIFI module of the external control device receives the control command, the control circuit of the external control device drives the connecting rod driving device according to the control command, and the connecting rod driving device drives the connecting rod to move, and will be connected with The door handle connected by the connecting rod is opened; The infrared sensor of the external control device detects the switch state of the door lock, transmits the switch state of the door lock to the smart terminal through a wireless router, and displays it on the smart terminal; If the distance sensor of the external control device detects that there are people within the preset distance in front of the door, the camera is started to collect information outside the door, and the collected information is transmitted to the smart terminal through the wireless router; After viewing the information collected by the camera on the smart terminal, the user edits and sends the unlock password to the unregistered illegal smart terminal and the external control device; The illegal smart terminal inputs the unlock password in the password input module, and the control circuit verifies that the input unlock password matches the unlock password sent by the legitimate smart terminal, and drives the connecting rod driving device to drive the connecting rod to open the door. ; The power monitoring circuit detects the remaining power of the battery pack, and sends an alarm message when the remaining power is less than a safe value, and the alarm message is sent to the smart terminal through the wireless router; The switching circuit detects whether the commercial power is normal, and switches to the battery pack power supply circuit to provide electric energy for the external control device when there is no commercial power.