A mobile terminal bluetooth control method and system based on bluetooth unlocking

Abstract

The application discloses a mobile terminal Bluetooth control method based on Bluetooth unlocking, and comprises the following steps: acquiring a first geographical position of a Bluetooth lock, a first air pressure value corresponding to the height of the Bluetooth lock, and a second geographical position of a mobile terminal; when a first difference between the second geographical position and the first geographical position is within a first preset threshold; acquiring a second air pressure value corresponding to the current mobile terminal; when a second difference between the second air pressure value and the first air pressure value is within a second preset threshold; and starting the Bluetooth of the mobile terminal. The Bluetooth of the mobile terminal can be started or stopped without manual operation, which can avoid a series of problems caused by long-term Bluetooth opening and can more conveniently and intelligently use the Bluetooth lock.

Description

Technical Field

[0001] This invention relates to the technical field of mobile terminal control, and in particular to a Bluetooth control method and system for mobile terminals based on Bluetooth unlocking. Background Technology

[0002] Existing Bluetooth access control systems mainly consist of an access controller and an access lock device, which communicate via Bluetooth. Currently, most Bluetooth access control systems use a mobile phone as the access controller. Users need to pair their phone with the access lock device via Bluetooth before use. During use, users need to install a related unlocking app. If the user keeps Bluetooth off, they must manually turn it on before approaching the access control system and then input the unlock command through the app to control the access lock device and instruct it to unlock.

[0003] However, in reality, unlocking via a mobile phone by entering unlock commands is complex, especially for the elderly, children, and people with disabilities who cannot use mobile phones normally. Even for those proficient in using mobile phones, enabling Bluetooth is still necessary, which is time-consuming and laborious. Another approach involves keeping Bluetooth constantly enabled on the mobile terminal connected to the access control system, which presents the following five problems: 1. Minimal power consumption: Silent listening consumes only a small amount of power, while frequent scanning and multiple devices resident will exacerbate power loss.

[0004] 2. Privacy risks: Malicious devices can detect device names, models, and online status, and in extreme cases, eavesdrop on audio and transmitted data.

[0005] 3. Malicious harassment attacks include receiving unfamiliar Bluetooth pop-ups and advertising pushes; a few vulnerable device models may be maliciously manipulated.

[0006] 4. Occasional system anomalies: frequent background polling, slight memory usage, occasional Bluetooth freezes, and power switch malfunctions.

[0007] 5. It occupies the Bluetooth pairing position of the Bluetooth access control system, preventing other users from automatically unlocking the device via Bluetooth connection.

[0008] Therefore, automatically turning Bluetooth on and off on mobile terminals according to actual usage scenarios has become an urgent problem to be solved. Summary of the Invention

[0009] Based on the above, this invention proposes a mobile terminal Bluetooth control method based on Bluetooth unlocking, allowing users to intelligently activate the Bluetooth function of their mobile terminal when approaching a Bluetooth lock, without having to keep Bluetooth on continuously for extended periods. By connecting to a Bluetooth lock in the home or vehicle via Bluetooth, users can conveniently unlock the lock without having to take out their mobile terminal, while also eliminating various accidental unlocking scenarios and improving the user experience.

[0010] This invention provides a Bluetooth control method for a mobile terminal based on Bluetooth unlocking, which involves obtaining a first geographical location of the Bluetooth lock, a first air pressure value corresponding to its altitude, and a second geographical location of the mobile terminal; when the first difference between the second geographical location and the first geographical location is within a first preset threshold; obtaining the second air pressure value corresponding to the current mobile terminal; when the second air pressure value and the second difference between the second air pressure value and the first air pressure value are within a second preset threshold; and turning on the Bluetooth of the mobile terminal.

[0011] Furthermore, the Bluetooth lock is a house access control lock, including a first Bluetooth signal module installed in front of the door and a second Bluetooth signal module installed behind the door; the mobile terminal is paired and connected with the Bluetooth lock; the first signal of the first Bluetooth signal module and the second signal of the second Bluetooth signal module are respectively acquired; when the first signal strength of the first signal is greater than a first preset signal strength threshold and the first signal strength is not less than the second signal strength of the second signal, the Bluetooth access control is unlocked.

[0012] Furthermore, the first Bluetooth signal module is provided with a first Bluetooth signal blocking layer to block Bluetooth signals from behind the door to the front; the second Bluetooth signal module is provided with a second Bluetooth signal blocking layer to block Bluetooth signals from in front of the door to the back.

[0013] Furthermore, when the first signal strength is less than the second signal strength, the mobile terminal disconnects from the Bluetooth access control and enters sleep mode, or the mobile terminal turns off Bluetooth.

[0014] Furthermore, when the mobile terminal connects to the preset WIFI network, the mobile terminal de-pairs from the Bluetooth lock and enters sleep mode, or the mobile terminal turns off Bluetooth; when the mobile terminal disconnects from the preset WIFI network, the mobile terminal wakes up the Bluetooth connection.

[0015] Furthermore, the Bluetooth lock is a vehicle-mounted Bluetooth lock, including vehicle Bluetooth; the mobile terminal pairs and connects with the vehicle Bluetooth; the vehicle Bluetooth receives a third signal and the third signal strength respectively; when the third signal strength is greater than a second preset signal strength threshold, the Bluetooth access control is unlocked.

[0016] Furthermore, the third geographic location of the mobile terminal is obtained. When the third difference between the third geographic location and the first geographic location is greater than a third preset threshold, the Bluetooth of the mobile terminal is turned off.

[0017] Furthermore, the first geographical location and the first air pressure value corresponding to the altitude of the Bluetooth lock are updated and uploaded to the server.

[0018] Furthermore, after the Bluetooth lock is paired and connected with the mobile terminal, it needs to obtain the user's voice command and ensure that the user's voice command matches the preset voice command before unlocking. The user's voice command includes the user's voiceprint.

[0019] This invention also provides a Bluetooth control system for a mobile terminal based on Bluetooth unlocking, comprising a Bluetooth lock information acquisition module, a mobile terminal information acquisition module, and a Bluetooth control module, with each module being signal-connected; the Bluetooth lock information acquisition module acquires a first geographical location of the Bluetooth lock and a first air pressure value corresponding to its altitude; the mobile terminal information acquisition module acquires a second geographical location of the mobile terminal and a second air pressure value corresponding to its altitude; the Bluetooth control module is used to acquire a second air pressure value corresponding to the current mobile terminal when the first difference between the second geographical location and the first geographical location is within a first preset threshold; and to enable Bluetooth on the mobile terminal when the second difference between the second air pressure value and the first air pressure value is within a second preset threshold.

[0020] Some of the technical advantages of this disclosure are: it allows users to intelligently activate the Bluetooth function of their mobile devices when approaching the Bluetooth lock, without having to keep Bluetooth on continuously for extended periods, thus avoiding the various drawbacks of constantly having Bluetooth on the mobile device. Simultaneously, it allows users to conveniently unlock the lock while carrying their mobile devices without using an app, solving the problem of complex and inconvenient operation when users input unlocking commands via their phones in existing technologies, thereby achieving keyless automatic unlocking; furthermore, it automatically eliminates situations where unlocking or connection is unnecessary, avoiding unnecessary misoperations. Attached Figure Description

[0021] To better understand the technical solutions of this disclosure, reference can be made to the following accompanying drawings, which are used to assist in the illustration of the prior art or embodiments. These drawings selectively illustrate the products or methods involved in the prior art or some embodiments of this disclosure. The basic information of these drawings is as follows: Figure 1 This is a flowchart illustrating an embodiment of the Bluetooth control method for mobile terminals based on Bluetooth unlocking according to the present invention.

[0022] Figure 2 This is a structural schematic diagram of an embodiment of the Bluetooth access control lock of the present invention.

[0023] Figure 3 This is a schematic diagram of an embodiment of the Bluetooth control system for mobile terminals based on Bluetooth unlocking according to the present invention. Detailed Implementation

[0024] The following will further describe the technical means or effects involved in this disclosure. Obviously, the provided embodiments are only some implementations of this disclosure, and not all of them. Based on the embodiments in this disclosure and the explicit or implicit descriptions in the figures and text, all other embodiments that can be obtained by those skilled in the art without creative effort will be within the scope of protection of this disclosure.

[0025] like Figure 1 As shown, the method in this embodiment includes the following steps: The first geographical location of the Bluetooth lock, the first air pressure value corresponding to its altitude, and the second geographical location of the mobile terminal are obtained respectively. S1. Obtain the first geographical location of the Bluetooth lock, the first air pressure value corresponding to its altitude, and the second geographical location of the mobile terminal.

[0026] There are several ways to obtain the first geographical location and the corresponding first air pressure value at the height of the Bluetooth lock: First, obtain the geographical location and air pressure value of the mobile terminal (phone) when it was last paired with the Bluetooth lock, and pre-store them as the first geographical location and the corresponding first air pressure value at the height of the Bluetooth lock. Because the effective distance of Bluetooth connection is not very long, although there is some error in this data, it will not affect the effect during use. Second, install a positioning chip and a barometer in the Bluetooth lock, collect the corresponding data in real time, and then send it to the mobile terminal through the network. This method has high accuracy, but it will increase the hardware cost significantly. Obtaining geographical location and air pressure value is mainly to adapt to scenarios where multiple Bluetooth locks are used together. In this embodiment, the Bluetooth lock can be a house access control lock, a car Bluetooth access control system, or an automatic lock used by electric vehicles and bicycles; the corresponding use cases include driving a car into an underground parking garage, going to a shopping mall, and then returning to the car; a user taking the elevator back to their floor after going out; and scenarios where multiple car Bluetooth access control systems and house access control systems are used in combination. It's important to distinguish between the two: because the car is moving, its primary geolocation and primary air pressure need to be updated in real time, but this is done using existing hardware and won't significantly affect usability. The mobile device, on the other hand, can obtain its secondary geolocation in real time and compare it with the Bluetooth lock's primary geolocation.

[0027] S2. When the first difference between the second geographical location and the first geographical location is within a first preset threshold; obtain the second air pressure value corresponding to the current mobile terminal; when the second difference between the second air pressure value and the first air pressure value is within a second preset threshold; turn on the Bluetooth of the mobile terminal.

[0028] If the difference between the second and first geographical locations is within a first preset threshold, it indicates that the user's mobile terminal is relatively close to the Bluetooth lock in terms of planar coordinates. However, due to the difference in floor levels, activating the Bluetooth function on the mobile terminal has little effect. This first preset threshold can be 100 meters or a number set by the user according to their usage habits. For example, if a user parks in a parking space on the second basement level of a shopping mall while dining on the third floor, the planar coordinates may overlap, but automatically activating Bluetooth would only waste battery power. Therefore, once the planar positions are relatively close, the second air pressure value corresponding to the current mobile terminal is obtained. By comparing the second air pressure value with the first air pressure value, and ensuring the difference is within the second preset threshold, the height difference between the mobile terminal and the Bluetooth lock can be determined. This second preset threshold is the air pressure difference corresponding to 5 meters (of course, different thresholds can be set according to needs). If both conditions are met, it indicates that the user needs to activate the Bluetooth lock. Intelligently activating the mobile terminal's Bluetooth avoids the need to keep the Bluetooth function constantly on, thus avoiding the various drawbacks of constantly having Bluetooth enabled. First, the first geographical location of the Bluetooth lock, the first air pressure value corresponding to its altitude, and the second geographical location of the mobile terminal are obtained. Then, the second air pressure value corresponding to the current mobile terminal is obtained only to reduce the data acquisition waste caused by repeatedly obtaining the second air pressure value. In practical applications, these values ​​can be obtained simultaneously before performing the corresponding operations. It should be noted that this simple modification is still within the scope of protection of this invention.

[0029] As a preferred embodiment, the mobile terminal automatically turns on Bluetooth and then pairs and connects with the house's Bluetooth access control lock. For example... Figure 2 As shown, this Bluetooth access control lock includes a first Bluetooth signal module located before the access control system, a second Bluetooth signal module located after the access control system, a comparison control module, and a lock cylinder. The first and second Bluetooth signal modules are respectively connected to the comparison control module, which is connected to the lock cylinder. The Bluetooth access control lock periodically sends broadcast signals at a pre-set frequency using Bluetooth Low Energy technology. When a user returns home, they use a mobile terminal to activate the Bluetooth function and approach the Bluetooth access control system. The Bluetooth signal sent by the mobile terminal is received by the first Bluetooth signal module and recorded as the first signal and its corresponding first signal strength. The second Bluetooth signal module receives the signal and records it as the second signal and its corresponding second signal strength. Since the transmission distance of Bluetooth is generally over 5 meters, unlocking immediately upon pairing and connection could result in the user not being able to approach the door for a period of time after unlocking, creating a security risk. Furthermore, most access control systems will automatically lock again after a period of time if the user is not entered promptly, resulting in invalid unlocking. Unlocking immediately upon connection is only suitable for a few situations, such as users very close to elevator or stairwell entrances.

[0030] The first Bluetooth signal module includes a first Bluetooth antenna and a first Bluetooth RF receiver chip. The first Bluetooth antenna is disposed in a first drilled hole facing the door of the Bluetooth access control system, transmitting the received Bluetooth signal to the first Bluetooth RF receiver chip to generate a first signal. The second Bluetooth signal module includes a second Bluetooth antenna and a second Bluetooth RF receiver chip. The second Bluetooth antenna is disposed in a second drilled hole facing the back of the door of the Bluetooth access control system, transmitting the received Bluetooth signal to the second Bluetooth RF receiver chip to generate a second signal. The first Bluetooth antenna is encased in a first Bluetooth signal blocking layer to block Bluetooth signals from behind the door; the second Bluetooth antenna is encased in a second Bluetooth signal blocking layer to block Bluetooth signals from the front of the door. Since Bluetooth signals have the ability to penetrate walls, when the first Bluetooth antenna of the Bluetooth access control lock receives Bluetooth signals from the front of the door, it will inevitably transmit through the wall or door to the second Bluetooth antenna. The Bluetooth signal blocking layer can greatly reduce the signal transmission strength, thus greatly reducing false detections. It should be noted that the first signal of the first Bluetooth signal module and the second signal of the second Bluetooth signal module can be obtained by a mobile terminal or by the Bluetooth access control system. The decision depends on which component performs the final calculation and control. During Bluetooth pairing, both the first and second signals are transmitted and received; therefore, there's no limitation on signal transmission or reception, only a distinction is made between the signals from the first and second Bluetooth signal modules. In practice, when a user approaches a Bluetooth access lock at approximately 1 meter, the first Bluetooth antenna receives a signal strength of approximately -48dBm. With a Bluetooth signal blocking layer, the signal strength drops even faster, with the second Bluetooth antenna receiving a signal strength of approximately -78dBm (this may have some error; the figures here are for ease of understanding). Although the actual distance between the first and second Bluetooth antennas might be 10cm, the signal strength will differ significantly, thus greatly reducing false positives. Bluetooth signals can penetrate walls, so in practical applications, the possibility of the first Bluetooth antenna receiving a signal while the second Bluetooth antenna doesn't is very low (unless special protection and isolation are implemented; otherwise, complete signal isolation is generally impossible in home use because waves bounce, so even if the antenna only receives unidirectional signals, it will still receive the bounced signal; complete isolation would be extremely costly). After a mobile terminal is paired with a Bluetooth access control system, it can use existing multi-chip signal reception or different timing sequences for reception; these are existing technologies and will not be described in detail here. Determining Bluetooth signal strength is essentially determining distance; using higher-precision Bluetooth positioning for distance determination will yield better results. The correspondence between Bluetooth signal strength and distance is shown in the table below:

[0031] Bluetooth signal strength and distance comparison table 1 Meanwhile, the first Bluetooth signal blocking layer is adapted to the size of the first drilled hole and is shaped like a funnel or a frustum; the second Bluetooth signal blocking layer is adapted to the size of the second drilled hole and is shaped like a funnel or a frustum. Setting the Bluetooth signal blocking layer in a funnel shape facilitates better signal reception by the antenna. With the first drilled hole located at the front end of the Bluetooth access control system and the second drilled hole located at the rear end, theoretically, they can be placed at either the front or rear end of the access control system without affecting aesthetics or signal reception.

[0032] The closer a user's mobile device is to the Bluetooth door lock, the stronger the initial signal strength received. After multiple comparative experiments, it was found that when a user is approximately 1 meter away from the door, the lock unlocks most conveniently, allowing the user to enter the house. Therefore, when a user's mobile device is approximately 1 meter away from the Bluetooth door lock, the initial signal strength received by the first Bluetooth antenna is approximately -48dBm (greater than the preset signal strength threshold). The second Bluetooth antenna, connected to the back of the door, is normally within 15cm of the first Bluetooth antenna, and the received second signal strength will not exceed -48dBm. This indicates that the user is returning from outside and can successfully unlock the Bluetooth door lock.

[0033] Access control systems that automatically unlock based on Bluetooth signal strength or distance (most current systems rely on terminal operation after connection) have at least three drawbacks: First, because the Bluetooth signal strength remains after entry, the access control can unlock even when not needed (e.g., after removing shoes at the door). Second, maintaining the connection prevents other users within range from using the Bluetooth lock or achieving smart unlocking. Third, even if a user closes the door after leaving, the Bluetooth access control will still unlock based on the signal strength. Ensuring the first signal strength is not less than the second signal strength allows unlocking only at the front of the door, eliminating the possibility of unlocking from behind. If the second signal strength is greater than the first, it indicates the user has entered the house. In this case, de-pairing the mobile terminal with the Bluetooth access control or disabling Bluetooth on the mobile terminal allows other users to unlock the door normally. De-pairing can be achieved by the phone's Bluetooth periodically checking the first and second signal strengths; if the second signal strength is greater than the first, it checks again after a certain period, repeating this cycle to resolve the issue of users monopolizing the Bluetooth access control pairing connection. For users with a home Wi-Fi network, when a mobile device connects to the preset Wi-Fi network, it will not automatically reconnect to the Bluetooth access control after unpairing from the network. When the mobile device disconnects from the preset Wi-Fi network, it can then reconnect to the Bluetooth access control. This also solves the problem of users outside who haven't entered the house being unable to use the Bluetooth access control. Furthermore, when the first signal strength changes from being less than the second signal strength to being no less than the second signal strength, it indicates that the user has moved from inside the house to outside. At this point, the comparison control module does not control the lock cylinder's unlocking / unlocking state, preventing the user from mistakenly locking the door after locking it when leaving.

[0034] As a preferred embodiment, the Bluetooth lock is a vehicle-mounted Bluetooth lock, which is further divided into car Bluetooth locks, electric motorcycle Bluetooth locks, and bicycle Bluetooth locks. These include a vehicle-mounted Bluetooth system, where a mobile terminal pairs and connects with the vehicle's Bluetooth; they acquire the vehicle's Bluetooth signal and its strength; when the signal strength exceeds a second preset threshold, the Bluetooth lock unlocks. Since it cannot distinguish location by using two Bluetooth signal modules, it can only automatically unlock based on signal strength.

[0035] Furthermore, since automatic unlocking via Bluetooth could allow unauthorized access if the mobile device is lost, a setting is needed to prevent unlocking even if the mobile device is paired with the Bluetooth lock while it is locked. This eliminates security risks while maintaining ease of use. When the Bluetooth lock pairs with the mobile device while the screen is locked, it needs to receive the user's voice command, which must match a preset voice command or the user's voiceprint. For example, if the preset voice command is "Open Sesame" or the voiceprint is identified as belonging to the user, the user can use the mobile device to pair with the Bluetooth lock while the phone is locked. Saying "Open Sesame" matches the preset voice command and unlocks the lock. This eliminates the need to unlock the phone screen; the user can unlock the lock securely simply by speaking, freeing their hands and adding a fun element to the process. Of course, including the user's voiceprint in the voice command further enhances user security.

[0036] like Figure 3 As shown, this embodiment also includes a Bluetooth control system for a mobile terminal based on Bluetooth unlocking, including a Bluetooth lock information acquisition module, a mobile terminal information acquisition module, and a Bluetooth control module, with each module connected by signals; the Bluetooth lock information acquisition module acquires the first geographical location of the Bluetooth lock and the first air pressure value corresponding to its altitude; the mobile terminal information acquisition module acquires the second geographical location of the mobile terminal and the second air pressure value corresponding to its altitude; the Bluetooth control module is used to acquire the second air pressure value corresponding to the current mobile terminal when the first difference between the second geographical location and the first geographical location is within a first preset threshold; and to enable Bluetooth on the mobile terminal when the second air pressure value and the second difference between the second air pressure value and the first air pressure value are within a second preset threshold.

[0037] An embodiment of a Bluetooth control system for a mobile terminal based on Bluetooth unlocking is based on a method embodiment and will not be described again here.

[0038] Within the scope of knowledge and ability of those skilled in the art, the various embodiments or technical features mentioned herein can be combined with each other as other optional embodiments without conflict. These finite number of optional embodiments, which are not listed one by one and are formed by combining a finite number of technical features, still fall within the scope of the technology disclosed herein and are also derived by those skilled in the art from the accompanying drawings and the foregoing.

[0039] To reiterate, the embodiments listed above are typical and preferred embodiments of this disclosure, and are only used to describe and explain the technical solutions of this disclosure in detail to facilitate the reader's understanding. They are not intended to limit the scope of protection or application of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure to obtain technical solutions should be covered within the scope of protection of this disclosure.

Claims

1. A Bluetooth control method for a mobile terminal based on Bluetooth unlocking, characterized in that: The system acquires the first geographical location of the Bluetooth lock, the first air pressure value corresponding to its altitude, and the second geographical location of the mobile terminal. When the first difference between the second geographical location and the first geographical location is within a first preset threshold, the system acquires the second air pressure value corresponding to the current mobile terminal. When the second difference between the second air pressure value and the first air pressure value is within a second preset threshold, the system turns on the Bluetooth of the mobile terminal.

2. The mobile terminal Bluetooth control method according to claim 1, characterized in that: The Bluetooth lock is a house access control lock, including a first Bluetooth signal module installed in front of the door and a second Bluetooth signal module installed behind the door; the mobile terminal is paired and connected with the Bluetooth lock; the first signal of the first Bluetooth signal module and the second signal of the second Bluetooth signal module are respectively acquired; when the first signal strength of the first signal is greater than a first preset signal strength threshold and the first signal strength is not less than the second signal strength of the second signal, the Bluetooth access control is unlocked.

3. The mobile terminal Bluetooth control method according to claim 2, characterized in that: When the first signal strength is less than the second signal strength, the mobile terminal disconnects from the Bluetooth access control system or the mobile terminal turns off Bluetooth.

4. The mobile terminal Bluetooth control method according to claim 1, characterized in that: The Bluetooth lock is a vehicle-mounted Bluetooth lock, including a vehicle-mounted Bluetooth device; the mobile terminal is paired and connected to the vehicle-mounted Bluetooth device; the third signal and the third signal strength of the vehicle-mounted Bluetooth device are acquired respectively; when the third signal strength is greater than a second preset signal strength threshold, the Bluetooth access control is unlocked.

5. The mobile terminal Bluetooth control method according to any one of claims 1-4, characterized in that: Obtain the third geographic location of the mobile terminal. When the third difference between the third geographic location and the first geographic location is greater than a third preset threshold, set the Bluetooth of the mobile terminal to be turned off.

6. The mobile terminal Bluetooth control method according to any one of claims 1-4, characterized in that: The first geographical location and the first air pressure value corresponding to the altitude of the Bluetooth lock are updated and uploaded to the server.

7. The Bluetooth switch control method according to any one of claims 2-4, characterized in that: After the Bluetooth lock is paired and connected with the mobile terminal, it needs to obtain the user's voice command and the user's voice command must be consistent with the preset voice command before it can be unlocked.

8. A Bluetooth control system for a mobile terminal based on Bluetooth unlocking, characterized in that: a Bluetooth lock information acquisition module, a mobile terminal information acquisition module, and a Bluetooth control module are signal-connected to each other; the Bluetooth lock information acquisition module acquires a first geographical location of the Bluetooth lock and a first air pressure value corresponding to its altitude; the mobile terminal information acquisition module acquires a second geographical location of the mobile terminal and a second air pressure value corresponding to its altitude; the Bluetooth control module is used to acquire a second air pressure value corresponding to the current mobile terminal when the first difference between the second geographical location and the first geographical location is within a first preset threshold; and to enable Bluetooth on the mobile terminal when the second air pressure value and the second difference between the second air pressure value and the first air pressure value are within a second preset threshold.

9. The mobile terminal Bluetooth control system according to claim 8, characterized in that: The Bluetooth lock is a house access control lock, including a first Bluetooth signal module installed in front of the door and a second Bluetooth signal module installed behind the door; the mobile terminal is paired and connected with the Bluetooth lock; the first signal of the first Bluetooth signal module and the second signal of the second Bluetooth signal module are respectively acquired; when the first signal strength of the first signal is greater than a first preset signal strength threshold and the first signal strength is not less than the second signal strength of the second signal, the Bluetooth access control is unlocked.

10. The mobile terminal Bluetooth control system according to claim 9, characterized in that: When the first signal strength is less than the second signal strength, the mobile terminal disconnects from the Bluetooth access control system or the mobile terminal turns off Bluetooth.

11. The mobile terminal Bluetooth control system according to any one of claims 8-10, characterized in that: Obtain the third geographic location of the mobile terminal. When the third difference between the third geographic location and the first geographic location is greater than a third preset threshold, set the Bluetooth of the mobile terminal to be turned off.

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