Bluetooth positioning system and vehicle

Abstract

The embodiment of the utility model discloses a Bluetooth positioning system and a vehicle. The Bluetooth positioning system comprises a microprocessor and at least three Bluetooth anchor point modules, the Bluetooth anchor point module is connected with the microprocessor; the at least two Bluetooth anchor point modules are connected with each other; the Bluetooth anchor point module is used for carrying out Bluetooth signal detection on Bluetooth connection with the Bluetooth key through Bluetooth channel detection, determining a distance value with the Bluetooth key according to a detected Bluetooth signal, and sending a link transfer instruction to the next Bluetooth anchor point module, so that the Bluetooth anchor point module carries out Bluetooth connection and distance measurement according to the link transfer instruction; the microprocessor is used for receiving the distance value sent by the Bluetooth anchor point module, performing geometric calculation processing according to the preset position information of the Bluetooth anchor point module and the corresponding distance value, and determining the positioning information of the Bluetooth key; ranging and positioning of the Bluetooth key are carried out based on Bluetooth channel detection, the problem that RSS I ranging and positioning are inaccurate is solved, and the accuracy and reliability of ranging and positioning of the Bluetooth key are improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of vehicle positioning, in particular to a Bluetooth positioning system and a vehicle. BACKGROUND

[0002] The keyless entry technology has been widely used in modern cars. This technology allows the owner to easily unlock and start the vehicle without using the traditional mechanical key through radio frequency identification or Bluetooth identification. Keyless entry not only improves the convenience of users, but also enhances the security of vehicles. With the development of technology, keyless entry systems are becoming more and more intelligent and popular, becoming an important standard configuration of modern cars.

[0003] Most of the current Bluetooth positioning methods use the received signal strength indication (RSSI) received by Bluetooth to position, that is, the relationship between the strength of the Bluetooth signal transmitted and the distance between the transmitting point and the receiving point is used to position. The positioning accuracy of Bluetooth RSSI is generally 2-5 meters. In actual application, factors such as anchor point position and environment affect the propagation of Bluetooth signals, resulting in problems such as volatility and outliers of Bluetooth signal values. As a result, the correlation between the signal attenuation model and the distance will be weakened, resulting in further expansion of the positioning error, causing the positioning position to drift, the area to be misjudged, and affecting the use experience of the Bluetooth key. CONTENT OF THE UTILITY MODEL

[0004] The embodiment of the present application provides a Bluetooth positioning system and a vehicle, which can solve the technical problem of inaccurate Bluetooth key distance positioning and improve the accuracy of Bluetooth key distance positioning.

[0005] The embodiment of the present application provides a Bluetooth positioning system, which comprises a microprocessor and at least three Bluetooth anchor point modules.

[0006] The Bluetooth anchor point module is connected with the microprocessor.

[0007] The at least three Bluetooth anchor point modules are connected with each other.

[0008] When the Bluetooth anchor point module is used to establish a Bluetooth connection with the Bluetooth key, the Bluetooth signal of the Bluetooth connection is detected through the Bluetooth channel detection, the distance value between the Bluetooth anchor point module and the Bluetooth key is determined according to the detected Bluetooth signal, and a link transfer instruction is sent to the next Bluetooth anchor point module, so that the Bluetooth anchor point module establishes a Bluetooth connection and measures the distance according to the link transfer instruction.

[0009] The microprocessor is configured to receive distance values transmitted by the at least two Bluetooth anchor modules, perform geometric calculation based on preset position information of the corresponding Bluetooth anchor modules and the corresponding distance values, and determine the positioning information of the Bluetooth key.

[0010] In an embodiment, the Bluetooth anchor module comprises a first antenna, a first wireless control unit, a first bus transceiver unit and a first bus interface.

[0011] The first wireless control unit is connected with the first antenna and the first bus transceiver unit, and the first antenna is configured to establish a Bluetooth connection with the Bluetooth key.

[0012] The first bus transceiver unit is connected with the first bus interface.

[0013] The first bus interface is connected with the microprocessor.

[0014] In an embodiment, the microprocessor comprises a first micro control unit, a second bus transceiver unit and a second bus interface.

[0015] The first micro control unit is connected with the second bus transceiver unit.

[0016] The second bus transceiver unit is connected with the second bus interface.

[0017] The second bus interface is connected with the Bluetooth anchor module.

[0018] In an embodiment, the Bluetooth anchor module is arranged at a preset position of the vehicle.

[0019] In an embodiment, the Bluetooth anchor module is arranged at one or more positions of an in-vehicle position, a co-pilot position, a trunk position, a main driver position and a vehicle head position, the in-vehicle position is arranged at a preset position of a driving control area of the vehicle, the co-pilot position is arranged at a preset position of a co-pilot area of the vehicle, the trunk position is arranged at a preset position of a trunk area of the vehicle, the main driver position is arranged at a preset position of a main driver area of the vehicle, and the vehicle head position is arranged at a preset position of a vehicle head area of the vehicle.

[0020] In an embodiment, the Bluetooth anchor module is arranged in the vehicle, and the Bluetooth anchor module comprises a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module and a fourth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module and the fourth Bluetooth anchor module is one.

[0021] The first Bluetooth anchor module is arranged at the in-vehicle position, and the in-vehicle position is arranged at a preset position of a driving control area of the vehicle.

[0022] The second Bluetooth anchor module is arranged at the co-pilot position, and the co-pilot position is arranged at a preset position of a co-pilot area of the vehicle.

[0023] The third Bluetooth anchor module is arranged at a trunk position, and the trunk position is located at a preset position of a trunk area of the vehicle;

[0024] The fourth Bluetooth anchor module is arranged at a main driver position, and the main driver position is located at a preset position of a main driver area of the vehicle.

[0025] In an embodiment, the Bluetooth anchor modules are arranged in the vehicle, and the Bluetooth anchor modules include a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module, a fourth Bluetooth anchor module and a fifth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module, the fourth Bluetooth anchor module and the fifth Bluetooth anchor module is one;

[0026] The first Bluetooth anchor module is arranged at an in-vehicle position, and the in-vehicle position is located at a preset position of a driving control area of the vehicle;

[0027] The second Bluetooth anchor module is arranged at a co-driver position, and the co-driver position is located at a preset position of a co-driver area of the vehicle;

[0028] The third Bluetooth anchor module is arranged at a trunk position, and the trunk position is located at a preset position of a trunk area of the vehicle;

[0029] The fourth Bluetooth anchor module is arranged at a main driver position, and the main driver position is located at a preset position of a main driver area of the vehicle.

[0030] The fifth Bluetooth anchor module is arranged at a vehicle head position, and the vehicle head position is located at a preset position of a vehicle head area of the vehicle.

[0031] In an embodiment, the Bluetooth anchor modules are arranged at one or more of an in-vehicle position, a first top corner position, a second top corner position, a third top corner position and a fourth top corner position of the vehicle, the in-vehicle position is located at a preset position of a driving control area of the vehicle, and the first top corner position, the second top corner position, the third top corner position and the fourth top corner position are preset positions of four top corners around the vehicle.

[0032] In an embodiment, the Bluetooth anchor modules are arranged in the vehicle, and the Bluetooth anchor modules include a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module, a fourth Bluetooth anchor module and a fifth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module, the fourth Bluetooth anchor module and the fifth Bluetooth anchor module is one;

[0033] The first Bluetooth anchor module is arranged at an in-vehicle position, and the in-vehicle position is located at a preset position of a driving control area of the vehicle;

[0034] The second Bluetooth anchor module is arranged at a first top corner position of the vehicle;

[0035] The third Bluetooth anchor module is arranged at a second top corner position of the vehicle;

[0036] The fourth Bluetooth anchor module is arranged at a third top corner position of the vehicle;

[0037] The fifth Bluetooth anchor module is arranged at a fourth top corner position of the vehicle;

[0038] The first top corner position, the second top corner position, the third top corner position and the fourth top corner position are preset positions of four top corners around the vehicle.

[0039] The embodiment of the present application also provides a vehicle comprising the Bluetooth positioning system.

[0040] The Bluetooth anchor modules are connected with each other, so that the Bluetooth anchor modules can realize the transfer of the Bluetooth connection link based on the link transfer instruction, and thus each Bluetooth anchor module can perform the ranging of the Bluetooth channel detection based on the Bluetooth connection with the Bluetooth key to obtain the distance value between itself and the Bluetooth key. In addition, based on the connection between the Bluetooth anchor modules and the microprocessor, each Bluetooth anchor module can send the distance value determined by itself to the microprocessor, so that the microprocessor can finally determine the positioning information of the Bluetooth key by comprehensively considering the distance values measured by all the Bluetooth anchor modules. By using the above technical means, the ranging can be performed by the Bluetooth channel detection which has better stability, stronger anti-interference ability and wider ranging range, so as to avoid the technical problem of inaccurate positioning caused by the ranging based on RSSI. The ranging and positioning of the Bluetooth key are performed based on the Bluetooth channel detection, so as to improve the accuracy and reliability of the ranging and positioning of the Bluetooth key.

[0041] The vehicle provided by the above embodiment has the beneficial effects of the Bluetooth positioning system. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a first schematic diagram of a Bluetooth positioning system provided by the embodiment of the present application;

[0043] Figure 2 is a second schematic diagram of a Bluetooth positioning system provided by the embodiment of the present application;

[0044] Figure 3 is a third schematic diagram of a Bluetooth positioning system provided by the embodiment of the present application;

[0045] Figure 4 is a fourth schematic diagram of a Bluetooth positioning system provided by the embodiment of the present application;

[0046] Figure 5This is a fifth schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application;

[0047] Figure 6 This is a sixth schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application;

[0048] Figure 7 This is a seventh schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application;

[0049] Figure 8 This is the eighth schematic diagram of a Bluetooth positioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0051] Figure 1 This is a first schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application. Figure 2 This is a second schematic diagram of a Bluetooth positioning system provided in an embodiment of the present application, referring to Figure 1 and Figure 2 The Bluetooth positioning system 1 includes a microprocessor 11 and at least three Bluetooth anchor point modules 12, each connected to the microprocessor 11. The Bluetooth anchor point modules 12 are interconnected. When establishing a Bluetooth connection with a Bluetooth key 2, the Bluetooth anchor point module 12 detects Bluetooth signals using Bluetooth channel detection (Channel Sounding technology), determines the distance to the Bluetooth key 2 based on the detected Bluetooth signals, and sends a link transfer instruction to the next Bluetooth anchor point module 12, so that the Bluetooth anchor point module 12 establishes a Bluetooth connection and performs distance measurement according to the link transfer instruction. The microprocessor 11 is configured to receive the distance values ​​sent by the at least three Bluetooth anchor point modules 12, perform geometric calculations based on the preset position information of the corresponding Bluetooth anchor point modules 12 and the corresponding distance values, and determine the positioning information of the Bluetooth key.

[0052] In an embodiment, the Bluetooth anchor module 12 is further configured to, in a case where it is confirmed that it is in the first connection state, establish a Bluetooth connection with the Bluetooth key 2, and perform Bluetooth signal sounding on the Bluetooth connection through the Bluetooth channel sounding; perform calculation and processing on the Bluetooth signal obtained through the sounding, to obtain a carrier signal phase, perform calculation and processing on the carrier signal phase, to obtain time-domain distribution data of the carrier signal phase and a multipath effect index; perform calculation and processing on the time-domain distribution data of the carrier signal phase, to obtain a distance value between the Bluetooth anchor module 12 and the Bluetooth key 2, and send the distance value and the multipath effect index calculated by the Bluetooth anchor module 12 to the microprocessor 11, and then the Bluetooth anchor module 12 exits the first connection state and sends a link transfer instruction to the next Bluetooth anchor module 12, so that the Bluetooth anchor module 12 enters the first connection state according to the link transfer instruction.

[0053] The Bluetooth channel sounding (technology) has better stability, stronger anti-interference capability, and a wider ranging range, so that the technical problem of inaccurate positioning caused by RSSI ranging can be avoided, and the Bluetooth key is ranged and positioned based on the Bluetooth channel sounding, so that the accuracy and reliability of the Bluetooth key ranging and positioning are improved.

[0054] The Bluetooth positioning system 1 includes at least three Bluetooth anchor modules 12. When each Bluetooth anchor module 12 establishes a Bluetooth connection with the Bluetooth key 2, the signal quality of the corresponding Bluetooth signal can be different. Therefore, each Bluetooth anchor module 12 determines the signal quality based on the multipath effect index of the carrier signal after receiving and transmitting the carrier signal based on the Bluetooth connection. When the multipath effect index is less than a preset threshold, the signal quality is relatively high. When the multipath effect index is greater than or equal to the preset threshold, the signal quality is relatively low.

[0055] Figure 2 FIG. 2 is a second schematic view of a Bluetooth positioning system according to an embodiment of the present application, which is described with reference to FIG. 1. Figure 2 The Bluetooth anchor module 12 includes a first antenna 121, a first wireless control unit 122, a first bus transceiver unit 123, and a first bus interface 124. The first wireless control unit 122 is connected with the first antenna 121 and the first bus transceiver unit 123, and the first antenna 121 is configured to establish a communication connection with the Bluetooth key 2. The first bus transceiver unit 123 is connected with the first bus interface 124. The first bus interface 124 is connected with the microprocessor 11 (i.e., the second bus interface 113).

[0056] When the ranging start instruction is received from the first preset Bluetooth anchor module or the broadcast signal of the Bluetooth key, the first connection state is entered. When the first connection state is determined, the first preset Bluetooth anchor module establishes a Bluetooth connection with the Bluetooth key and performs Bluetooth signal detection on the Bluetooth connection through the Bluetooth channel. Subsequently, the signal quality and distance can be detected based on the detected Bluetooth signal. The first preset Bluetooth anchor module obtains the corresponding carrier signal phase based on the detected Bluetooth signal, and calculates and processes the carrier signal phase to obtain the time domain distribution data of the carrier signal phase and the multipath effect index. The distance value between the first preset Bluetooth anchor module and the Bluetooth key is calculated and processed based on the time domain distribution data of the carrier signal phase. After the distance value and the multipath effect index are sent to the microprocessor, the first connection state is exited and a link transfer instruction is sent to the next Bluetooth anchor module (i.e., the second preset Bluetooth anchor module), so that the Bluetooth anchor module (i.e., the second preset Bluetooth anchor module) enters the first connection state according to the link transfer instruction. In this way, all Bluetooth anchor modules enter the first connection state based on the Bluetooth connection with the Bluetooth key, obtain the corresponding distance value and multipath effect index, and report them to the microprocessor.

[0057] The microprocessor 11 includes a first micro control unit 111, a second bus transceiver unit 112, and a second bus interface 113. The first micro control unit 111 is connected to the second bus transceiver unit 112. The second bus transceiver unit 112 is connected to the second bus interface 113. The second bus interface 113 is connected to the Bluetooth anchor module 12 (i.e., the first bus interface 124). The microprocessor 11 is configured to receive the distance value and the multipath effect index sent by the at least three Bluetooth anchor modules 12, and perform geometric calculation and processing based on the preset position information of the corresponding Bluetooth anchor module 12 and the corresponding distance value to determine the positioning information of the Bluetooth key 2.

[0058] In an embodiment, the microprocessor performs mean value processing on the distance values sent by all Bluetooth anchor modules to obtain a distance mean value. When the distance mean value is less than a first preset threshold value, geometric calculation and processing are performed based on the preset position information of all Bluetooth anchor modules and the corresponding distance value to determine the positioning information of the Bluetooth key. When the distance mean value is greater than or equal to the first preset threshold value, the distance value sent by the Bluetooth anchor module with a multipath effect index less than a second preset threshold value is determined as a target distance value based on the multipath effect index sent by all Bluetooth anchor modules. Geometric calculation and processing are performed based on the target distance value and the preset position information of the corresponding Bluetooth anchor module to determine the positioning information of the Bluetooth key.

[0059] In an embodiment, the Bluetooth positioning system further includes a controller (not shown in the figure), which is configured to perform vehicle unlocking, locking, and greeting operations according to the position area of the Bluetooth key.

[0060] In an embodiment, the first bus transceiver unit 123 and the second bus transceiver unit 112 are used to convert CAN (Controller Area Network) / LIN (Local Interconnect Network) signals. Thus, the Bluetooth anchor module 12 is connected with the microprocessor through the CAN bus or the LIN bus.

[0061] The specific number of the Bluetooth anchor module in the Bluetooth positioning system can be set according to actual conditions. Figure 3 is a third schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application, referring to Figures 1-3 The Bluetooth anchor module 12 is arranged at one or more of the in-vehicle position 1A, the co-driver position 2, the trunk position 3, the main driver position 4 and the vehicle head position 5. The in-vehicle position 1A is located at a preset position of the driving control area of the vehicle, the co-driver position 2 is located at a preset position of the co-driver area of the vehicle, the trunk position 3 is located at a preset position of the trunk area of the vehicle, the main driver position 4 is located at a preset position of the main driver area of the vehicle, and the vehicle head position 5 is located at a preset position of the vehicle head area of the vehicle. The number of the Bluetooth anchor module 12 arranged at the in-vehicle position 1A, the co-driver position 2, the trunk position 3, the main driver position 4 and the vehicle head position 5 can be set according to actual conditions, and the number of the Bluetooth anchor module 12 arranged at each position is not limited in the embodiment.

[0062] Referring to Figures 1-3In this embodiment, the Bluetooth positioning system includes four Bluetooth anchor point modules 12. The Bluetooth anchor point modules 12 are four, and the Bluetooth anchor point modules 12 are arranged in the vehicle. The Bluetooth anchor point modules 12 include a first Bluetooth anchor point module 12a, a second Bluetooth anchor point module 12b, a third Bluetooth anchor point module 12c, and a fourth Bluetooth anchor point module 12d. The first Bluetooth anchor point module 12a is arranged at an in-vehicle position 1A, which is located at a preset position of the driver control area of the vehicle. The second Bluetooth anchor point module 12b is arranged at a co-driver position 2, which is located at a preset position of the co-driver area of the vehicle. The third Bluetooth anchor point module 12c is arranged at a trunk position 3, which is located at a preset position of the trunk area of the vehicle. The fourth Bluetooth anchor point module 12d is arranged at a main driver position 4, which is located at a preset position of the main driver area of the vehicle. Through the arrangement of the four Bluetooth anchor point modules 12, the detection range can cover the in-vehicle area and the surrounding areas of the main driver, the co-driver, and the trunk. Generally, the Bluetooth key 2 is located in these areas when there is a need for unlocking and locking, etc. Therefore, by arranging the four Bluetooth anchor point modules 12 at the in-vehicle position 1A, the co-driver position 2, the trunk position 3, and the main driver position 4, the comprehensiveness and accuracy of Bluetooth positioning can be improved, and the user's experience can be improved.

[0063] The specific number of Bluetooth anchor point modules in the Bluetooth positioning system can be set according to actual conditions. Figure 4 FIG. 4 is a fourth schematic view of a Bluetooth positioning system provided by an embodiment of the present application, referring to FIG. 1, Figures 1-2 and Figure 4In this embodiment, the Bluetooth positioning system includes five Bluetooth anchor point modules 12. The Bluetooth anchor point modules 12 are five, and the Bluetooth anchor point modules 12 are arranged in the vehicle, and the Bluetooth anchor point modules 12 include a first Bluetooth anchor point module 12a, a second Bluetooth anchor point module 12b, a third Bluetooth anchor point module 12c, and a fourth Bluetooth anchor point module 12d. Among them, the number of the first Bluetooth anchor point module 12a is two, and the number of the second Bluetooth anchor point module 12b, the third Bluetooth anchor point module 12c and the fourth Bluetooth anchor point module 12d is one. One of the first Bluetooth anchor point modules 12a is arranged at the in-vehicle position 1A, and the in-vehicle position 1A is located at the preset position of the driver control area of the vehicle. Another first Bluetooth anchor point module 12a is arranged at the in-vehicle position 1B, and the in-vehicle position 1B is located at the preset position of the driver control area of the vehicle, and the in-vehicle position 1A and the in-vehicle position 1B are arranged adjacent to each other. The second Bluetooth anchor point module 12b is arranged at the co-pilot position 2, and the co-pilot position 2 is located at the preset position of the co-pilot area of the vehicle. The third Bluetooth anchor point module 12c is arranged at the trunk position 3, and the trunk position 3 is located at the preset position of the trunk area of the vehicle. The fourth Bluetooth anchor point module 12d is arranged at the main driver position 4, and the main driver position 4 is located at the preset position of the main driver area of the vehicle. Through the position setting of the five Bluetooth anchor point modules 12, the detection range can cover the in-vehicle area and the surrounding area of the main driver, the surrounding area of the co-pilot and the surrounding area of the trunk. Usually, the Bluetooth key 2 is located in these areas when there is a need for unlocking and locking, etc. Therefore, by arranging the five Bluetooth anchor point modules 12 at the in-vehicle position 1A, the in-vehicle position 1B, the co-pilot position 2, the trunk position 3 and the main driver position 4, the comprehensiveness and accuracy of the Bluetooth positioning can be improved, and the user's experience can be improved.

[0064] The specific number of Bluetooth anchor point modules in the Bluetooth positioning system can be set according to actual conditions. Figure 5is a fifth schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application, and the embodiment is described by taking an example of the Bluetooth positioning system including five Bluetooth anchor point modules 12. The Bluetooth anchor point modules 12 are five, the Bluetooth anchor point modules 12 are arranged in the vehicle, and the Bluetooth anchor point modules 12 include a first Bluetooth anchor point module 12a, a second Bluetooth anchor point module 12b, a third Bluetooth anchor point module 12c, a fourth Bluetooth anchor point module 12d and a fifth Bluetooth anchor point module 12e. The first Bluetooth anchor point module 12a is arranged at an in-vehicle position 1A, and the in-vehicle position 1A is located at a preset position of a driver control area of the vehicle. The second Bluetooth anchor point module 12b is arranged at a copilot position 2, and the copilot position 2 is located at a preset position of a copilot area of the vehicle. The third Bluetooth anchor point module 12c is arranged at a trunk position 3, and the trunk position 3 is located at a preset position of a trunk area of the vehicle. The fourth Bluetooth anchor point module 12d is arranged at a main driver position 4, and the main driver position 4 is located at a preset position of a main driver area of the vehicle. The fifth Bluetooth anchor point module 12e is arranged at a vehicle head position 5, and the vehicle head position 5 is located at a preset position of a vehicle head area of the vehicle. Through the position arrangement of the five Bluetooth anchor point modules 12, the detection range can cover the in-vehicle area and the main driver surrounding area, the copilot surrounding area, the trunk surrounding area and the vehicle head surrounding area, and the Bluetooth key 2 is usually located in these areas when the unlocking and locking needs exist, therefore, by arranging the five Bluetooth anchor point modules 12 at the in-vehicle position 1A, the copilot position 2, the trunk position 3, the main driver position 4 and the vehicle head position 5, the comprehensiveness and accuracy of the Bluetooth positioning can be improved, and the user's use experience can be improved.

[0065] The specific number of the Bluetooth anchor point modules in the Bluetooth positioning system can be set according to actual conditions. Figure 6 is a sixth schematic diagram of a Bluetooth positioning system provided by an embodiment of the present application, and the embodiment is described by taking an example of the Bluetooth positioning system including six Bluetooth anchor point modules 12. The Bluetooth anchor point modules 12 are six, the Bluetooth anchor point modules 12 are arranged in the vehicle, and the Bluetooth anchor point modules 12 include a first Bluetooth anchor point module 12a, a second Bluetooth anchor point module 12b, a third Bluetooth anchor point module 12c, a fourth Bluetooth anchor point module 12d, a fifth Bluetooth anchor point module 12e and a sixth Bluetooth anchor point module 12f. The first Bluetooth anchor point module 12a is arranged at an in-vehicle position 1A, and the in-vehicle position 1A is located at a preset position of a driver control area of the vehicle. The second Bluetooth anchor point module 12b is arranged at a copilot position 2, and the copilot position 2 is located at a preset position of a copilot area of the vehicle. The third Bluetooth anchor point module 12c is arranged at a trunk position 3, and the trunk position 3 is located at a preset position of a trunk area of the vehicle. The fourth Bluetooth anchor point module 12d is arranged at a main driver position 4, and the main driver position 4 is located at a preset position of a main driver area of the vehicle. The fifth Bluetooth anchor point module 12e is arranged at a vehicle head position 5, and the vehicle head position 5 is located at a preset position of a vehicle head area of the vehicle. The sixth Bluetooth anchor point module 12f is arranged at a vehicle rear position 6, and the vehicle rear position 6 is located at a preset position of a vehicle rear area of the vehicle. Through the position arrangement of the six Bluetooth anchor point modules 12, the detection range can cover the in-vehicle area and the main driver surrounding area, the copilot surrounding area, the trunk surrounding area, the vehicle head surrounding area and the vehicle rear surrounding area, and the Bluetooth key 2 is usually located in these areas when the unlocking and locking needs exist, therefore, by arranging the six Bluetooth anchor point modules 12 at the in-vehicle position 1A, the copilot position 2, the trunk position 3, the main driver position 4, the vehicle head position 5 and the vehicle rear position 6, the comprehensiveness and accuracy of the Bluetooth positioning can be improved, and the user's use experience can be improved. Figures 1-2 and Figure 6In this embodiment, the Bluetooth positioning system includes six Bluetooth anchor modules 12. The six Bluetooth anchor modules 12 are arranged in the vehicle, and the Bluetooth anchor modules 12 include a first Bluetooth anchor module 12a, a second Bluetooth anchor module 12b, a third Bluetooth anchor module 12c, a fourth Bluetooth anchor module 12d, and a fifth Bluetooth anchor module 12e. The number of the first Bluetooth anchor module 12a is two, and the number of the second Bluetooth anchor module 12b, the third Bluetooth anchor module 12c, the fourth Bluetooth anchor module 12d, and the fifth Bluetooth anchor module 12e is one. One of the first Bluetooth anchor modules 12a is arranged at an in-vehicle position 1A, and the in-vehicle position 1A is located at a preset position of the driver control area of the vehicle. The other first Bluetooth anchor module 12a is arranged at an in-vehicle position 1B, and the in-vehicle position 1B is located at a preset position of the driver control area of the vehicle. The in-vehicle position 1A and the in-vehicle position 1B are arranged adjacently. The second Bluetooth anchor module 12b is arranged at a co-driver position 2, and the co-driver position 2 is located at a preset position of the co-driver area of the vehicle. The third Bluetooth anchor module 12c is arranged at a trunk position 3, and the trunk position 3 is located at a preset position of the trunk area of the vehicle. The fourth Bluetooth anchor module 12d is arranged at a main driver position 4, and the main driver position 4 is located at a preset position of the main driver area of the vehicle. The fifth Bluetooth anchor module 12e is arranged at a vehicle head position 5, and the vehicle head position 5 is located at a preset position of the vehicle head area of the vehicle. Through the arrangement of the six Bluetooth anchor modules 12, the detection range can cover the in-vehicle area and the surrounding areas of the main driver, the co-driver, the trunk, and the vehicle head. Generally, the Bluetooth key 2 is located in these areas when the unlocking and locking needs exist. Therefore, by arranging the six Bluetooth anchor modules 12 at the in-vehicle position 1A, the in-vehicle position 1B, the co-driver position 2, the trunk position 3, the main driver position 4, and the vehicle head position 5, the comprehensiveness and accuracy of the Bluetooth positioning can be improved, and the user experience can be improved.

[0066] The specific number of the Bluetooth anchor modules in the Bluetooth positioning system can be set according to the actual situation. Figure 7 FIG. 7 is a seventh schematic view of a Bluetooth positioning system provided by the embodiment of the present application, referring to FIG. 1, Figures 1-2 and Figure 6The Bluetooth anchor module 12 is arranged at one or more of the in-vehicle position 1A, the first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9. The in-vehicle position 1A is a preset position in the driving control area of the vehicle. The first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9 are preset positions of the four top corners around the vehicle. The number of Bluetooth anchor modules 12 arranged at the in-vehicle position 1A, the first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9 can be set according to actual conditions. In this embodiment, the number of Bluetooth anchor modules 12 arranged at each position is not limited.

[0067] Referring to Figures 1-2 and Figure 7 , this embodiment takes five Bluetooth anchor modules 12 as an example. The five Bluetooth anchor modules 12 are arranged in the vehicle. The Bluetooth anchor modules 12 include a first Bluetooth anchor module 12a, a second Bluetooth anchor module 12b, a third Bluetooth anchor module 12c, a fourth Bluetooth anchor module 12d, and a fifth Bluetooth anchor module 12e. The first Bluetooth anchor module 12a is arranged at the in-vehicle position 1A, which is a preset position in the driving control area of the vehicle. The second Bluetooth anchor module 12b is arranged at the first top corner position 6 of the vehicle. The third Bluetooth anchor module 12c is arranged at the second top corner position 7 of the vehicle. The fourth Bluetooth anchor module 12d is arranged at the third top corner position 8 of the vehicle. The fifth Bluetooth anchor module 12e is arranged at the fourth top corner position 9 of the vehicle. The first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9 are preset positions of the four top corners around the vehicle. Through the arrangement of the five Bluetooth anchor modules 12, the detection range can cover the in-vehicle area and the surrounding area of the four top corners, and the Bluetooth key 2 is usually located in these areas when there is a need for unlocking or locking, etc. Therefore, by arranging the five Bluetooth anchor modules 12 at the in-vehicle position 1A, the first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9, the comprehensiveness and accuracy of Bluetooth positioning can be improved, and the user's experience can be improved.

[0068] Figure 8 is a eighth schematic view of a Bluetooth positioning system provided by the embodiment of the present application, referring to Figures 1-2 and Figure 8In this embodiment, the Bluetooth positioning system includes six Bluetooth anchor point modules 12. The six Bluetooth anchor point modules 12 are arranged in the vehicle, and the Bluetooth anchor point modules 12 include a first Bluetooth anchor point module 12a, a second Bluetooth anchor point module 12b, a third Bluetooth anchor point module 12c, a fourth Bluetooth anchor point module 12d, and a fifth Bluetooth anchor point module 12e. Among them, the number of the first Bluetooth anchor point module 12a is two, and the number of the second Bluetooth anchor point module 12b, the third Bluetooth anchor point module 12c, the fourth Bluetooth anchor point module 12d, and the fifth Bluetooth anchor point module 12e is one. One of the first Bluetooth anchor point modules 12a is arranged at an in-vehicle position 1A, which is located at a preset position of the driver control area of the vehicle. The other first Bluetooth anchor point module 12a is arranged at an in-vehicle position 1B, which is located at a preset position of the driver control area of the vehicle, and the in-vehicle position 1A and the in-vehicle position 1B are arranged adjacent to each other. The second Bluetooth anchor point module 12b is arranged at a first top corner position 6 of the vehicle. The third Bluetooth anchor point module 12c is arranged at a second top corner position 7 of the vehicle. The fourth Bluetooth anchor point module 12d is arranged at a third top corner position 8 of the vehicle. The fifth Bluetooth anchor point module 12e is arranged at a fourth top corner position 9 of the vehicle. The first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9 are preset positions of the four corners around the vehicle. Through the position arrangement of the six Bluetooth anchor point modules 12, the detection range can cover the in-vehicle area and the surrounding area of the four corners, and the Bluetooth key 2 is usually located in these areas when there is a need for unlocking and the like. Therefore, by arranging the six Bluetooth anchor point modules 12 at the in-vehicle position 1A, the in-vehicle position 1B, the first top corner position 6, the second top corner position 7, the third top corner position 8, and the fourth top corner position 9, the comprehensiveness and accuracy of Bluetooth positioning can be improved, and the user's experience can be improved.

[0069] As described above, through the mutual connection between the Bluetooth anchor point modules, the Bluetooth anchor point modules can realize the transfer of the Bluetooth connection link based on the link transfer instruction, so that each Bluetooth anchor point module can perform Bluetooth channel sounding ranging based on the Bluetooth connection with the Bluetooth key to obtain the distance value between itself and the Bluetooth key. Moreover, based on the connection between the Bluetooth anchor point modules and the microprocessor, each Bluetooth anchor point module can send the distance value determined by itself to the microprocessor, so that the microprocessor can finally determine the positioning information of the Bluetooth key by comprehensively considering the distance values measured by all Bluetooth anchor point modules. By using the above technical means, the ranging can be performed through the Bluetooth channel sounding with better stability, stronger anti-interference ability, and wider ranging range, so as to avoid the technical problem of inaccurate positioning caused by RSSI ranging. The ranging and positioning of the Bluetooth key are performed based on the Bluetooth channel sounding, thereby improving the accuracy and reliability of the Bluetooth key ranging and positioning.

[0070] The embodiment of the present application also provides a vehicle comprising the Bluetooth positioning system.

[0071] The beneficial effects of the vehicle provided above can refer to the beneficial effects of the Bluetooth positioning system.

[0072] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0073] In the present application, unless otherwise explicitly specified and limited, the terms "provision", "installation", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0075] It should be noted that in the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0076] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A Bluetooth positioning system, characterized in that The application relates to a vehicle Bluetooth key positioning system. The application comprises: a microprocessor and at least three Bluetooth anchor modules; the Bluetooth anchor modules are connected with the microprocessor; the at least three Bluetooth anchor modules are connected with each other; when the Bluetooth anchor modules are connected with a Bluetooth key, the Bluetooth anchor modules detect the Bluetooth signal of the Bluetooth connection through Bluetooth channel detection, determine the distance value from the Bluetooth key according to the detected Bluetooth signal, and send a link transfer instruction to the next Bluetooth anchor module, so that the Bluetooth anchor modules perform Bluetooth connection and distance measurement according to the link transfer instruction; 2. The Bluetooth positioning system of claim 1, wherein, the microprocessor receives the distance values sent by the at least two Bluetooth anchor modules, performs geometric calculation processing according to the preset position information of the corresponding Bluetooth anchor module and the corresponding distance value, and determines the positioning information of the Bluetooth key. The Bluetooth anchor module comprises a first antenna, a first wireless control unit, a first bus transceiver unit and a first bus interface. The first wireless control unit is connected with the first antenna and the first bus transceiver unit, and the first antenna is used for establishing a Bluetooth connection with a Bluetooth key. The first bus transceiver unit is connected with the first bus interface.

3. The Bluetooth positioning system of claim 1, wherein, The first bus interface is connected with the microprocessor. The microprocessor comprises a first micro control unit, a second bus transceiver unit and a second bus interface. The first micro control unit is connected with the second bus transceiver unit. The second bus transceiver unit is connected with the second bus interface.

4. The Bluetooth positioning system of claim 1, wherein, The second bus interface is connected with the Bluetooth anchor module.

5. The Bluetooth positioning system of claim 1, wherein, The Bluetooth anchor module is arranged at a preset position of a vehicle.

6. The Bluetooth positioning system according to claim 1, characterized in that: The Bluetooth anchor module is arranged at one or more positions of an in-vehicle position, a co-pilot position, a trunk position, a main driver position and a vehicle head position, the in-vehicle position is arranged at a preset position of a driving control area of the vehicle, the co-pilot position is arranged at a preset position of a co-pilot area of the vehicle, the trunk position is arranged at a preset position of a trunk area of the vehicle, the main driver position is arranged at a preset position of a main driver area of the vehicle, and the vehicle head position is arranged at a preset position of a vehicle head area of the vehicle. The Bluetooth anchor module is arranged in a vehicle, the Bluetooth anchor module comprises a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module and a fourth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module and the fourth Bluetooth anchor module is one; the first Bluetooth anchor module is arranged at an in-vehicle position, and the in-vehicle position is arranged at a preset position of a driving control area of the vehicle; the second Bluetooth anchor module is arranged at a co-pilot position, and the co-pilot position is arranged at a preset position of a co-pilot area of the vehicle; the third Bluetooth anchor module is arranged at a trunk position, and the trunk position is arranged at a preset position of a trunk area of the vehicle; the fourth Bluetooth anchor module is arranged at a main driver position, and the main driver position is arranged at a preset position of a main driver area of the vehicle.

7. The Bluetooth positioning system of claim 1, wherein, The Bluetooth anchor module is arranged in the vehicle, and the Bluetooth anchor module includes a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module, a fourth Bluetooth anchor module, and a fifth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module, the fourth Bluetooth anchor module, and the fifth Bluetooth anchor module is one. The first Bluetooth anchor module is arranged at an in-vehicle position, and the in-vehicle position is located at a preset position of a driving control area of the vehicle. The second Bluetooth anchor module is arranged at a co-driver position, and the co-driver position is located at a preset position of a co-driver area of the vehicle. The third Bluetooth anchor module is arranged at a trunk position, and the trunk position is located at a preset position of a trunk area of the vehicle. The fourth Bluetooth anchor module is arranged at a main driver position, and the main driver position is located at a preset position of a main driver area of the vehicle. The fifth Bluetooth anchor module is arranged at a vehicle head position, and the vehicle head position is located at a preset position of a vehicle head area of the vehicle.

8. The Bluetooth positioning system of claim 1, wherein, The Bluetooth anchor module is arranged at one or more positions of an in-vehicle position, a first top corner position, a second top corner position, a third top corner position, and a fourth top corner position of the vehicle, the in-vehicle position is located at a preset position of a driving control area of the vehicle, and the first top corner position, the second top corner position, the third top corner position, and the fourth top corner position are preset positions of four top corners around the vehicle.

9. The Bluetooth positioning system of claim 1, wherein, The Bluetooth anchor module is arranged in the vehicle, and the Bluetooth anchor module includes a first Bluetooth anchor module, a second Bluetooth anchor module, a third Bluetooth anchor module, a fourth Bluetooth anchor module, and a fifth Bluetooth anchor module, the number of the first Bluetooth anchor module is one or two, and the number of the second Bluetooth anchor module, the third Bluetooth anchor module, the fourth Bluetooth anchor module, and the fifth Bluetooth anchor module is one. The first Bluetooth anchor module is arranged at an in-vehicle position, and the in-vehicle position is located at a preset position of a driving control area of the vehicle. The second Bluetooth anchor module is arranged at a first top corner position of the vehicle. The third Bluetooth anchor module is arranged at a second top corner position of the vehicle. The fourth Bluetooth anchor module is arranged at a third top corner position of the vehicle. The fifth Bluetooth anchor module is arranged at a fourth top corner position of the vehicle. The first top corner position, the second top corner position, the third top corner position, and the fourth top corner position are preset positions of four top corners around the vehicle.

10. A vehicle characterized by comprising: Comprise: The Bluetooth positioning system of any one of claims 1-9.

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