Control system and method for realizing non-inductive unlocking based on Bluetooth chip

Abstract

The invention discloses a control system and method for achieving non-inductive unlocking based on a Bluetooth chip, and relates to the technical field of intelligent door locks, and the control system for achieving non-inductive unlocking based on the Bluetooth chip comprises an intelligent door lock control subsystem and user equipment; the intelligent door lock control subsystem is in communication connection with user equipment; the intelligent door lock control subsystem comprises a Bluetooth chip, a radio frequency switch, an indoor Bluetooth antenna, an outdoor Bluetooth antenna, a fingerprint module connector, a fingerprint acquisition chip and an intelligent door lock mainboard; the Bluetooth chip is electrically connected with the radio frequency switch, the fingerprint acquisition chip and the fingerprint module connector; the fingerprint module connector is electrically connected with the intelligent door lock mainboard; the indoor Bluetooth antenna and the outdoor Bluetooth antenna are electrically connected with the radio frequency switch. The intelligent door lock has the beneficial effects that the safety of the intelligent door lock is ensured, and the user experience is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent door locks. More specifically, it relates to a control system and method for realizing touchless unlocking based on a Bluetooth chip. Background Art

[0002] In recent years, with the rapid development of artificial intelligence technology, consumer demand in the field of smart home has surged, and the entire smart home industry is also developing and penetrating rapidly. Among them, as an entry-level product of smart home and an important component of home intelligent security products, intelligent door locks have gradually become an important part of the smart home industry chain.

[0003] Therefore, the present invention provides a control system and method for realizing touchless unlocking based on a Bluetooth chip. When a user carries a bound user device and approaches the intelligent door lock outside the door, automatic unlocking can be achieved, and when the user is inside the door, accidental automatic unlocking will not be triggered, thus ensuring both the security of the intelligent door lock and optimizing the user experience. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a control system and method for realizing touchless unlocking based on a Bluetooth chip. When a user carries a bound user device and approaches the intelligent door lock outside the door, automatic unlocking can be achieved, and when the user is inside the door, accidental automatic unlocking will not be triggered, thus ensuring both the security of the intelligent door lock and optimizing the user experience.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A control system for realizing touchless unlocking based on a Bluetooth chip, wherein the improvement lies in that the control system for realizing touchless unlocking based on a Bluetooth chip includes an intelligent door lock control subsystem and a user device; the intelligent door lock control subsystem is communicatively connected to the user device;

[0006] The intelligent door lock control subsystem includes a Bluetooth chip, a radio frequency switch, an in-door Bluetooth antenna, an out-door Bluetooth antenna, a fingerprint module connector, a fingerprint acquisition chip, and an intelligent door lock main board; the Bluetooth chip is electrically connected to the radio frequency switch, the fingerprint acquisition chip, and the fingerprint module connector; the fingerprint module connector is electrically connected to the intelligent door lock main board; both the in-door Bluetooth antenna and the out-door Bluetooth antenna are electrically connected to the radio frequency switch.

[0007] Further, the intelligent door lock control subsystem further includes a first Bluetooth antenna connection seat and a second Bluetooth antenna connection seat; the first Bluetooth antenna connection seat is connected between the radio frequency switch and the out-door Bluetooth antenna; the second Bluetooth antenna connection seat is connected between the radio frequency switch and the in-door Bluetooth antenna.

[0008] Further, the fingerprint acquisition chip is provided with an SPI interface, and the fingerprint acquisition chip is connected to the Bluetooth chip through the SPI interface.

[0009] Further, the fingerprint module connector includes a UART interface, a VDD power supply interface, and an SVDD power supply interface; the UART interface is connected to the intelligent door lock main board and the Bluetooth chip; the VDD power supply interface is connected to the Bluetooth chip; the SVDD interface is connected to the fingerprint acquisition chip.

[0010] A control method for realizing touchless unlocking based on a Bluetooth chip, which is applied to a control system for realizing touchless unlocking based on a Bluetooth chip as described above. The improvement lies in that the control method for realizing touchless unlocking based on a Bluetooth chip includes the following steps:

[0011] S10, the intelligent door lock control subsystem scans for nearby Bluetooth devices through the Bluetooth chip. If a bound user device is found, the Bluetooth broadcast interval is shortened and the bound user device is continuously scanned.

[0012] S20, the intelligent door lock control subsystem determines whether the bound user device is outside the door through the Bluetooth chip. If so, the intelligent door lock control subsystem executes unlocking through the intelligent door lock main board.

[0013] S30, the intelligent door lock control subsystem disconnects from the bound user device in step S20 through the Bluetooth chip, and loops through steps S10 - S30.

[0014] Further, in step S10, the specific binding method of the user device is as follows:

[0015] S101, the intelligent door lock control subsystem verifies that the administrator enters the administrator mode and performs Bluetooth broadcast through the Bluetooth chip.

[0016] S102, the user device enters the binding mode through a customized mobile APP and requests to bind with the Bluetooth chip by searching for devices starting with ML.

[0017] S103, the user confirms whether to bind through the intelligent door lock control subsystem. If so, the binding is successful.

[0018] Further, in step S103, after the user device is successfully bound to the intelligent door lock control subsystem, the user device performs Bluetooth communication with the intelligent door lock control subsystem through the Bluetooth HID protocol, where the mobile phone serves as the HID host and the intelligent door lock control subsystem serves as the HID terminal device.

[0019] Further, in step S20, the specific method for the intelligent door lock control subsystem to determine whether the bound user device is outside the door through the Bluetooth chip is as follows:

[0020] S201, the Bluetooth chip continuously obtains the signal strength of the in-door Bluetooth antenna and the signal strength of the out-door Bluetooth antenna;

[0021] S202, the Bluetooth chip continuously compares the signal strength of the in-door Bluetooth antenna and the signal strength of the out-door Bluetooth antenna. If the signal strength of the out-door Bluetooth antenna is stronger than that of the in-door Bluetooth antenna for 3 consecutive times, and the difference in signal strength is greater than 10 dB, it is determined that the bound user device is located outside the door.

[0022] Further, in step S202, if the signal strength of the in-door Bluetooth antenna is stronger than that of the out-door Bluetooth antenna for 5 consecutive times, it is determined that the bound user device is located inside the door, and the Bluetooth chip will not connect to the scanned bound user device within 10 minutes; if the signal strength of the in-door Bluetooth antenna is stronger than that of the out-door Bluetooth antenna but does not meet the condition of 5 consecutive times, the Bluetooth chip will rescan the bound user device.

[0023] The beneficial effects of the present invention are as follows: The present invention binds the intelligent door lock control subsystem with the user device, and the Bluetooth chip scans the bound user devices near the intelligent door lock and determines whether the scanned bound user device is outside the door. If it is outside the door, the intelligent door lock main board is used to execute unlocking to achieve touchless unlocking of the intelligent door lock. During this process, when the user carries the bound user device and approaches the intelligent door lock outside the door, automatic unlocking can be achieved, and when the user is inside the door, accidental automatic unlocking will not be triggered, thus ensuring both the security of the intelligent door lock and optimizing the user experience. Description of the Drawings

[0024] Figure 1 It is a block diagram of a control system for realizing touchless unlocking based on a Bluetooth chip of the present invention;

[0025] Figure 2 It is a circuit schematic diagram of a control system for realizing touchless unlocking based on a Bluetooth chip of the present invention;

[0026] Figure 3 It is an overall flowchart of a control method for realizing touchless unlocking based on a Bluetooth chip of the present invention;

[0027] Figure 4 It is a schematic diagram of a control method for realizing touchless unlocking based on a Bluetooth chip shown in an embodiment;

[0028] Figure 5 It is a binding flowchart of a user device shown in an embodiment. Detailed Embodiments

[0029] The present invention will be further described below with reference to the drawings and embodiments.

[0030] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the composition of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations. The various technical features in the present invention can be interactively combined on the premise of not conflicting with each other.

[0031] Referring to Figure 1 and Figure 2 As shown, the present invention discloses a control system for realizing keyless unlocking based on a Bluetooth chip. The control system for realizing keyless unlocking based on a Bluetooth chip includes an intelligent door lock control subsystem and a user device; the intelligent door lock control subsystem is communicatively connected to the user device; the intelligent door lock control subsystem includes a Bluetooth chip U1, a radio frequency switch U3, an in-door Bluetooth antenna, an out-door Bluetooth antenna, a fingerprint module connector CN1, a fingerprint acquisition chip U2 and an intelligent door lock main board; the Bluetooth chip U1 is electrically connected to the radio frequency switch U3, the fingerprint acquisition chip U2 and the fingerprint module connector CN1; the fingerprint module connector CN1 is electrically connected to the intelligent door lock main board; both the in-door Bluetooth antenna and the out-door Bluetooth antenna are electrically connected to the radio frequency switch U3.

[0032] It should be noted that in this embodiment, the user equipment serves as an external device of the control system for realizing touchless unlocking based on a Bluetooth chip, acting as an interaction medium between the user and the intelligent door lock. The user can communicate with the intelligent door lock control subsystem through the user equipment to achieve touchless unlocking of the intelligent door lock. The intelligent door lock control subsystem is used to automatically execute the unlocking operation in response to the bound user equipment. Specifically, the intelligent door lock control subsystem includes a Bluetooth chip U1, a radio frequency switch U3, an in-door Bluetooth antenna, an out-door Bluetooth antenna, a fingerprint module connector CN1, a fingerprint acquisition chip U2, and an intelligent door lock main board. Among them, the Bluetooth chip U1 is used to realize wireless communication between the intelligent door lock control subsystem and the user equipment, and is used to obtain and compare the signal strengths (RSSI) of the in-door Bluetooth antenna and the out-door Bluetooth antenna to determine the position of the bound user equipment relative to the door. The radio frequency switch U3 is used to adjust the signal transmission paths of the in-door Bluetooth antenna and the out-door Bluetooth antenna to alternately send the wireless signals of the in-door Bluetooth antenna and the out-door Bluetooth antenna to the Bluetooth chip U1. The in-door Bluetooth antenna and the out-door Bluetooth antenna are used to transmit and receive wireless signals between the user equipment and the Bluetooth chip. The fingerprint module connector CN1 is used to connect the Bluetooth chip U1 and the intelligent door lock main board to realize communication between the Bluetooth chip U1 and the intelligent door lock main board. The fingerprint acquisition chip U2 is used to collect the administrator's fingerprint information during the binding process of the user equipment and the intelligent door lock control subsystem, and send the fingerprint information to the Bluetooth chip U1. The intelligent door lock main board is used to respond to the instructions of the Bluetooth chip and execute the unlocking operation. When specifically implementing the present invention, the administrator needs to first bind the user equipment to the intelligent door lock control subsystem so that the Bluetooth chip can automatically identify the bound user equipment. In the standby state, the intelligent door lock control subsystem continuously scans for Bluetooth devices near the intelligent door lock through the Bluetooth chip U1, and the time interval for each scan is about 500 ms. If a bound user equipment is scanned, at this time, the Bluetooth chip U1 will increase the scanning frequency, and the time interval for each scan is about 200 ms at this time. And the Bluetooth chip U1 will determine whether the bound user equipment is located outside the door by comparing the returned signal strength R1 of the in-door Bluetooth antenna and the signal strength R2 of the out-door Bluetooth antenna. Specifically, if R1 < R2 for three consecutive scans, and the difference between R1 and R2 is greater than 10 dB, then the bound user equipment is located outside the door. When it is determined that the bound user equipment is located outside the door, the Bluetooth chip U1 will send an unlocking instruction to the intelligent door lock main board through the fingerprint module connector CN1, and the intelligent door lock main board will respond to the unlocking instruction of the Bluetooth chip U1 and execute the unlocking operation to achieve touchless unlocking.In addition, when R1 and R2 do not meet the condition that R1 < R2 for three consecutive scans and the difference between R1 and R2 is greater than 10 dB, the intelligent door lock will not accidentally trigger automatic unlocking. Therefore, in this embodiment, when the user carries the bound user device and approaches the intelligent door lock outside the door, automatic unlocking can be achieved, and when the user is inside the door, accidental automatic unlocking will not occur, thus ensuring both the security of the intelligent door lock and optimizing the user experience.

[0033] Referring to Figure 2 As shown, the intelligent door lock control subsystem further includes a first Bluetooth antenna connector CN3 and a second Bluetooth antenna connector CN2; the first Bluetooth antenna connector CN3 is connected between the RF switch U3 and the Bluetooth antenna outside the door; the second Bluetooth antenna connector CN2 is connected between the RF switch U3 and the Bluetooth antenna inside the door.

[0034] It should be noted that in this embodiment, the design of the first Bluetooth antenna connector CN3 and the second connector CN2 is to facilitate the installation of the Bluetooth antenna inside the door and the Bluetooth antenna outside the door. Specifically, the first Bluetooth antenna connector CN3 is arranged at a position close to the outside of the door; the second Bluetooth antenna connector CN2 is arranged at a position close to the inside of the door, so that the signal strength received by the Bluetooth antenna outside the door from the bound user device outside the door is stronger; the signal strength received by the Bluetooth antenna inside the door from the bound user device inside the door is stronger, thus facilitating the Bluetooth chip U1 to identify the position of the bound user device relative to the door.

[0035] Continuing to refer to Figure 2 As shown, the fingerprint acquisition chip U2 is provided with an SPI interface, and the fingerprint acquisition chip U2 is connected to the Bluetooth chip U1 through the SPI interface.

[0036] It should be noted that in this embodiment, the SPI interface is a synchronous serial communication protocol for data exchange between the fingerprint acquisition chip U2 and the Bluetooth chip U1; specifically, during the process of binding the user device to the intelligent door lock control subsystem, the administrator needs to press to wake up the intelligent door lock control subsystem and make the intelligent door lock control subsystem enter the administrator mode. During this process, the fingerprint acquisition chip U2 is used to collect the administrator's fingerprint image and send it to the Bluetooth chip U1. The Bluetooth chip U1 extracts feature points from the collected administrator's fingerprint image and compares them with the registered fingerprint features stored. If the similarity is 80% or more, the administrator's identity is confirmed to be correct.

[0037] Continuing to refer to Figure 2As shown, the fingerprint module connector CN1 includes a UART interface, a VDD power supply interface, and an SVDD power supply interface; the UART interface is connected to the intelligent door lock main board and the Bluetooth chip U1; the VDD power supply interface is connected to the Bluetooth chip U1; the SVDD interface is connected to the fingerprint acquisition chip U2.

[0038] It should be noted that, in this embodiment, the UART interface is a serial communication interface, including an RX data line and an RT data line, and is used to implement data transmission between the Bluetooth chip U1 and the intelligent door lock main board; specifically, when the Bluetooth chip U1 confirms that the bound user device is outside the door, the Bluetooth chip U1 sends an unlocking instruction to the intelligent door lock main board through the UART interface; the VDD power supply interface is used to supply power to the Bluetooth chip U1 and the RF switch U3; the SVDD interface is used to supply power to the fingerprint acquisition chip U2.

[0039] Refer to Figures 3 - 5 As shown, the present invention also discloses a control method for realizing touchless unlocking based on a Bluetooth chip, which is applied to a control system for realizing touchless unlocking based on a Bluetooth chip as described in the above embodiment. The control method for realizing touchless unlocking based on a Bluetooth chip includes the following steps:

[0040] S10, the intelligent door lock control subsystem scans for nearby Bluetooth devices through the Bluetooth chip U1. If a bound user device is found, the Bluetooth broadcast interval is shortened and continuous scanning of the bound user device is performed.

[0041] It should be noted that, in this embodiment, when the Bluetooth chip discovers a bound user device, the intelligent door lock control subsystem will increase the scanning frequency by shortening the time interval of Bluetooth broadcasts (in the standby state, the time interval of Bluetooth broadcasts is about 500 ms. After discovering a bound Bluetooth device, the time interval of Bluetooth broadcasts is shortened to about 200 ms), so as to increase the connection opportunity with the bound user device, thereby accelerating the recognition process, promptly responding to the Bluetooth signal near the door lock, and ensuring the quick response and intelligent unlocking operation of the door lock;

[0042] It should also be noted that, in this embodiment, the user device needs to be bound before the intelligent door lock control subsystem scans for Bluetooth devices near the intelligent door lock. Specifically, the specific binding method of the user device is as follows:

[0043] S101, The intelligent door lock control subsystem verifies that the administrator enters the administrator mode and performs Bluetooth broadcasting through the Bluetooth chip U1. Among them, the specific verification process of the administrator is as follows: First, the administrator wakes up the intelligent door lock control subsystem by pressing the fingerprint recognition of the intelligent door lock. Specifically, when the finger presses, the S_INT pin of the fingerprint acquisition chip U2 generates a high level to wake up the intelligent lock main board. Then, the fingerprint acquisition chip U2 collects the fingerprint image of the administrator and sends it to the Bluetooth chip U1. Finally, the Bluetooth chip U1 extracts the feature points from the collected administrator fingerprint image and compares them with the registered fingerprint features stored. If the similarity is 80% or above, the administrator's identity is confirmed to be correct and enters the administrator mode;

[0044] S102, The user device enters the binding mode through the customized mobile APP and requests to bind with the Bluetooth chip U1 by searching for devices starting with ML. Among them, the customized mobile APP provides an interactive interface between the user device and the intelligent door lock control subsystem, which can complete the wireless connection and binding operation between the user device and the Bluetooth chip U1. Specifically, when the user device searches for a device starting with ML through the customized mobile APP, clicks to connect on the user device, the Bluetooth chip U1 receives the binding request and sends it to the intelligent door lock, and the intelligent door lock prompts the user to press the "#" key to confirm and the "*" key to exit;

[0045] S103, The user confirms whether to bind through the intelligent door lock control subsystem. If so, the binding is successful. And when the user device is successfully bound to the intelligent door lock control subsystem, the user device communicates with the intelligent door lock control subsystem through the Bluetooth HID protocol. Among them, the mobile phone is the HID host and the intelligent door lock control subsystem is the HID terminal device.

[0046] S20, The intelligent door lock control subsystem judges whether the bound user device is outside the door through the Bluetooth chip U1. If so, the intelligent door lock control subsystem executes unlocking through the intelligent door lock main board. Specifically, the specific method for the intelligent door lock control subsystem to judge whether the bound user device is outside the door through the Bluetooth chip U1 is as follows:

[0047] S201, The Bluetooth chip U1 continuously obtains the signal strength of the indoor Bluetooth antenna and the signal strength of the outdoor Bluetooth antenna;

[0048] S202, The Bluetooth chip U1 continuously compares the signal strength of the indoor Bluetooth antenna and the signal strength of the outdoor Bluetooth antenna. If the signal strength of the outdoor Bluetooth antenna is stronger than that of the indoor Bluetooth antenna for 3 consecutive times and the difference in signal strength is greater than 10 dB, it is determined that the bound user device is outside the door;

[0049] It should be noted that in this embodiment, since the first Bluetooth antenna connector CN3 is arranged near the outside of the door; the second Bluetooth antenna connector CN2 is arranged near the inside of the door, the signal strength of the outside Bluetooth antenna for receiving the already bound user device outside the door is stronger; the signal strength of the inside Bluetooth antenna for receiving the already bound user device inside the door is stronger. Therefore, when the user carries the already bound user device, the Bluetooth chip U1 can easily determine whether the already bound user device is outside the door by comparing the signal strength R1 of the inside Bluetooth antenna and the signal strength R2 of the outside Bluetooth antenna received. And by setting a 10dB difference between R1 and R2 and the scanning results for 3 consecutive times to ensure the accuracy of the comparison result, so as to prevent the intelligent door lock control subsystem from accidentally triggering automatic unlocking due to errors in one or two comparisons during the comparison process, thus ensuring the security and error tolerance of the intelligent door lock;

[0050] It should also be noted that in this embodiment, if the signal strength of the inside Bluetooth antenna is stronger than that of the outside Bluetooth antenna for 5 consecutive times, it is determined that the already bound user device is inside the door, and the Bluetooth chip U1 will not connect to the already bound user device scanned within 10 minutes; by comparing the signal strength of the inside Bluetooth antenna with that of the outside Bluetooth antenna for 5 consecutive times to confirm whether the already bound user device is inside the door ensures that the intelligent door lock will not fail to achieve automatic unlocking due to errors in the comparison results for 4 times or less, thus ensuring the practicability and error tolerance of the intelligent door lock;

[0051] It should also be noted that in this embodiment, if the signal strength of the inside Bluetooth antenna is stronger than that of the outside Bluetooth antenna and does not meet the condition of 5 consecutive times, the Bluetooth chip U1 will rescan the already bound user device; when the comparison result shows that the signal strength of the inside Bluetooth antenna is stronger than that of the outside Bluetooth antenna and does not meet the condition of 5 consecutive times, the Bluetooth chip U1 rescans the already bound user device to further confirm whether the already bound user device is outside the door, thus ensuring the practicability of the intelligent door lock;

[0052] It should also be noted that in this embodiment, when the user carries the already bound user device and approaches the intelligent door lock outside the door, automatic unlocking can be achieved, and when the user is inside the door, accidental automatic unlocking will not occur, thus ensuring both the security of the intelligent door lock and optimizing the user experience;

[0053] S30, the intelligent door lock control subsystem disconnects from the already bound user device in step S20 through the Bluetooth chip U1, and loops to execute steps S10 - S30.

[0054] It should be noted that in this embodiment, after the intelligent door lock control subsystem sends an unlocking instruction to the intelligent door lock main board through the Bluetooth chip U1 and performs the unlocking operation, the intelligent door lock control subsystem disconnects from the bound user device through the Bluetooth chip U1, and continues to scan other bound user devices in the standby mode. If other bound user devices are found, steps S10-S30 are re-executed to meet the unlocking needs of other users.

[0055] The above is a specific description of the preferred embodiment of the present invention. However, the present invention is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A control system for realizing non-sensing unlocking based on Bluetooth chip, characterized in that: The control system for realizing non-sensing unlocking based on the Bluetooth chip includes an intelligent door lock control subsystem and a user device; the intelligent door lock control subsystem is in communication connection with the user device; The smart door lock control subsystem includes a Bluetooth chip, a radio frequency switch, an inside-door Bluetooth antenna, an outside-door Bluetooth antenna, a fingerprint module connector, a fingerprint collection chip and a smart door lock mainboard; the Bluetooth chip is electrically connected to the radio frequency switch, the fingerprint collection chip and the fingerprint module connector; the fingerprint module connector is electrically connected to the smart door lock mainboard; the inside-door Bluetooth antenna and the outside-door Bluetooth antenna are both electrically connected to the radio frequency switch.

2. According to claim 1, a control system for realizing non-sensing unlocking based on a Bluetooth chip is characterized in that: The smart door lock control subsystem also includes a first Bluetooth antenna connection socket and a second Bluetooth antenna connection socket; the first Bluetooth antenna connection socket is connected between the radio frequency switch and the Bluetooth antenna outside the door; the second Bluetooth antenna connection socket is connected between the radio frequency switch and the Bluetooth antenna inside the door.

3. According to claim 1, a control system for realizing non-sensing unlocking based on a Bluetooth chip is characterized in that: The fingerprint collection chip is provided with an SPI interface, and the fingerprint collection chip is connected to the Bluetooth chip via the SPI interface.

4. According to claim 1, a control system for realizing non-sensing unlocking based on a Bluetooth chip is characterized in that: The fingerprint module connector includes a UART interface, a VDD power supply interface and an SVDD power supply interface; the UART interface is connected to the smart door lock mainboard and the Bluetooth chip; the VDD power supply interface is connected to the Bluetooth chip; and the SVDD interface is connected to the fingerprint acquisition chip.

5. A control method for realizing non-sensing unlocking based on a Bluetooth chip, applied to a control system for realizing non-sensing unlocking based on a Bluetooth chip as described in claims 1-4, characterized in that: The control method for realizing non-sensing unlocking based on the Bluetooth chip comprises the following steps: S10, the smart door lock control subsystem scans nearby Bluetooth devices through the Bluetooth chip. If a bound user device is found, the Bluetooth broadcast interval is shortened and the bound user device is continuously scanned; S20, the smart door lock control subsystem determines whether the bound user device is outside the door through the Bluetooth chip. If so, the smart door lock control subsystem performs unlocking through the smart door lock mainboard; S30, the smart door lock control subsystem disconnects from the user device bound in step S20 through the Bluetooth chip, and executes steps S10-S30 in a loop.

6. The control method for realizing non-sensing unlocking based on Bluetooth chip according to claim 5 is characterized in that: In step S10, the specific binding method of the user equipment is: S101, the smart door lock control subsystem verifies that the administrator enters the administrator mode and broadcasts Bluetooth through the Bluetooth chip; S102, the user device enters the binding mode through the customized mobile phone APP, and searches for devices starting with ML to request binding with the Bluetooth chip; S103, the user confirms whether to bind through the smart door lock control subsystem, if so, the binding is successful.

7. The control method for realizing non-sensing unlocking based on Bluetooth chip according to claim 5 is characterized in that: In step S103, when the user device is successfully bound to the smart door lock control subsystem, the user device communicates with the smart door lock control subsystem via Bluetooth HID protocol, wherein the mobile phone serves as the HID host and the smart door lock control subsystem as the HID terminal device.

8. The control method for realizing non-sensing unlocking based on Bluetooth chip according to claim 5 is characterized in that: In step S20, the smart door lock control subsystem determines whether the bound user device is outside the door through the Bluetooth chip in the following specific manner: S201, the Bluetooth chip continuously obtains the signal strength of the Bluetooth antenna inside the door and the signal strength of the Bluetooth antenna outside the door; S202, the Bluetooth chip continuously compares the signal strength of the Bluetooth antenna inside the door with the signal strength of the Bluetooth antenna outside the door. If the signal strength of the Bluetooth antenna outside the door is stronger than the signal strength of the Bluetooth antenna inside the door for three consecutive times, and the difference in signal strength is greater than 10dB, it is determined that the bound user device is outside the door.

9. The control method for realizing non-sensing unlocking based on Bluetooth chip according to claim 8 is characterized in that: In step S202, if the signal strength of the Bluetooth antenna inside the door is stronger than the signal strength of the Bluetooth antenna outside the door for five consecutive times, it is determined that the bound user device is located inside the door, and the Bluetooth chip will no longer connect to the scanned bound user device within 10 minutes; if the signal strength of the Bluetooth antenna inside the door is stronger than the signal strength of the Bluetooth antenna outside the door and does not meet the requirement for five consecutive times, the Bluetooth chip will re-scan the bound user device.

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