Multi-mode positioning circuit and device and mobile communication equipment
By introducing a Bluetooth master module into the multi-mode positioning circuit, centrally processing GNSS and cellular positioning signals, the complexity and accuracy of existing circuits are solved, and more efficient positioning and lower power consumption are achieved.
Patent Information
- Application Number
- CN202421513283.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing multimode positioning circuits are highly complex, which is not conducive to functional modularity, resulting in low positioning accuracy and large power consumption.
A multi-mode positioning circuit is designed to send and receive positioning signals from GNSS circuit modules and cellular circuit modules through the Bluetooth main control module, and combine it with its own Bluetooth signal to realize multi-mode positioning signal processing, simplifying the circuit structure.
The positioning accuracy is improved to within 10 meters, simplifying the circuit structure, reducing power consumption, and improving the functional modularity of the positioning system.
Smart Images
Figure CN223038185U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present utility model relate to the field of electronic circuits, and in particular to a multi-mode positioning circuit, device, and mobile communication device. Background Art
[0002] In the positioning technologies of personnel, equipment, vehicles, and other items, the most common one is GNSS (Global Navigation Satellite System), that is, the usual GPS system, Beidou system, etc., positioning systems that use satellite signals as carriers. However, since satellite signals are microwave signals and are easily interfered by buildings, metals, and glass, this positioning method often cannot work effectively when inside buildings, underground, or inside various shelters. Therefore, with the improvement of the requirements for positioning accuracy, existing positioning systems often cooperate with other positioning methods to work together, including cellular network positioning and WIFI network positioning. When a mobile device accesses the cellular network, cellular network positioning determines the positioning location based on the base station area and distance judged by the cellular network signal access point and strength, or the handover area between base stations. This positioning method has low accuracy but low power consumption. Generally, it needs to cooperate with other positioning modes to further determine the accurate position, and generally can be combined with positioning systems such as RFID, WIFI, and Bluetooth to determine the accurate position.
[0003] Existing positioning systems that combine multiple positioning methods are generally called multi-mode positioning systems. The circuit part of existing multi-mode positioning systems generally connects the circuit parts of various positioning methods through a main control chip, receives multiple signals to comprehensively judge the positioning location. The circuit implementation of this method is relatively complex. The main control chip is generally the processor of a mobile device, taking into account the needs of other software operations and data processing, which is not conducive to the functional modularization of the positioning circuit. Summary of the Utility Model
[0004] In a first aspect, an embodiment of the present application provides a multi-mode positioning circuit that solves the complexity problem of existing multi-mode circuits and is not conducive to the functional modularization of the positioning circuit, including:
[0005] A GNSS circuit module, having a GNSS processing unit and a GNSS signal processing circuit connected to the GNSS processing unit;
[0006] A cellular circuit module, having a switch unit, a card slot unit, and a cellular processing unit connected to the switch unit and the card slot unit;
[0007] The Bluetooth master module includes a Bluetooth master unit. The Bluetooth master unit has a GNSS circuit module interface and a cellular circuit module interface. The GNSS processing unit is connected to the GNSS circuit module interface, and the cellular processing unit is connected to the cellular circuit module interface.
[0008] In this embodiment, the multi-mode positioning circuit centrally receives and transmits the positioning signals of the GNSS circuit module and the cellular circuit module through the Bluetooth master module, and combines its own Bluetooth signal to implement multi-mode positioning signal processing. Compared with the previous method of multiple positioning modules separately sending signals to the main control chip, the circuit is simplified.
[0009] In a possible implementation, the Bluetooth master unit includes a main control GPS_RX interface, a main control GPS_TX interface, a main control 4G_RX interface, and a main control 4G_TX interface; the GNSS processing unit includes a GPS_RX interface connected to the main control GPS_RX interface and a GPS_TX interface connected to the main control GPS_TX interface; the cellular processing unit includes a 4G_TX interface connected to the main control 4G_RX interface and the main control 4G_TX interface.
[0010] In a possible implementation, the Bluetooth master unit includes a main control GPS_RTS interface and a main control GPS_CTS interface. The GNSS processing unit includes a GPS_RTS interface connected to the main control GPS_RTS interface and a GPS_CTS interface connected to the main control GPS_CTS interface.
[0011] In a possible implementation, the GNSS processing unit is connected to a GNSS signal processing circuit, which includes an antenna, a filtering unit connected to the antenna, and an amplifying unit connected to the filtering unit. The GNSS processing unit has a GNSS signal input interface, and the output end of the amplifying unit is connected to the GNSS signal input interface.
[0012] In a possible implementation, the filtering unit includes a filter with the model number B39162B8813D810; the amplifying unit includes an amplifier with the model number BGV8019.
[0013] In a possible implementation, in the cellular circuit module, the cellular processing unit has a USIM_DATA interface, a USIM_RST interface, and a USIM_CLK interface. The card slot unit includes a card slot IO interface, a card slot RST interface, and a card slot CLK interface. The USIM_DATA interface is connected to the card slot IO interface, the USIM_RST interface is connected to the card slot RST interface, and the USIM_CLK interface is connected to the card slot CLK interface.
[0014] In a possible implementation, the Bluetooth master control module is further connected to a motion sensing circuit module.
[0015] In a possible implementation, the motion sensing circuit module includes an acceleration motion sensor chip of model LIS2DW12. The acceleration motion sensor chip of LIS2DW12 has SDA / SDI / SDO interfaces, SDO / SA0 interfaces, CS interfaces, and SCL / SPC interfaces. The Bluetooth master control module is correspondingly provided with LIS2DW12_MOSI interfaces, LIS2DW12_MISO interfaces, LIS2DW12_CS interfaces, and the LIS2DW12_SCK interfaces. The SDA / SDI / SDO interfaces are connected to the LIS2DW12_MOSI interfaces, the SDO / SA0 interfaces are connected to the LIS2DW12_MISO interfaces, the CS interfaces are connected to the LIS2DW12_CS interfaces, and the SCL / SPC interfaces are connected to the LIS2DW12_SCK interfaces.
[0016] In a second aspect, an embodiment of the present application further discloses a multi-mode positioning device, which includes any one of the multi-mode positioning circuits in the first aspect above. After adopting the multi-mode positioning circuit in the first aspect, the multi-mode positioning device has a complete multi-mode positioning signal processing and output function, and can independently execute the processing of positioning signals and data generation.
[0017] In a third aspect, an embodiment of the present application further discloses a mobile communication device, which includes any one of the multi-mode positioning circuits in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall module structure of the first embodiment;
[0019] Figure 2 It is a schematic diagram of the connection between the Bluetooth master control module and the GNSS circuit module and interfaces in the first embodiment;
[0020] Figure 3 It is a schematic diagram of the connection between the Bluetooth master control module and the cellular circuit module in the first embodiment;
[0021] Figure 4 For Figure 2 It is a schematic diagram of the additional interface connection between the Bluetooth master control module and the GNSS circuit module based on
[0022] Figure 5 It is a schematic diagram of the structure of the GNSS signal processing circuit module in the first embodiment;
[0023] Figure 6 Schematic diagram of the interface connection between the cellular processing unit and the card slot unit in the first embodiment;
[0024] Figure 7 Schematic diagram of the module structure in the second embodiment;
[0025] Figure 8 Schematic diagram of the interface connection between the Bluetooth main control module and the motion sensing circuit module in the second embodiment;
[0026] Figure 9 Specific circuit diagram of the Bluetooth main control module in the third embodiment;
[0027] Figure 10 Specific circuit diagram of the GNSS circuit module in the third embodiment;
[0028] Figure 11 Specific circuit diagram of the cellular circuit module in the third embodiment. Detailed implementation manners
[0029] To make the objectives, technical solutions and advantages of the present application clearer, the following will describe the technical solutions of the present application in detail through implementation manners with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.
[0030] In the description of the present application, unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a movable connection, or a detachable connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific situations.
[0031] Combined as Figure 1 shown, the first embodiment of the present application provides a multi-mode positioning circuit, including:
[0032] GNSS circuit module 1, having a GNSS processing unit 11 and a GNSS signal processing circuit 12 connected to the GNSS processing unit 11;
[0033] The GNSS circuit module 1 is used to receive and process satellite signals, and convert the microwave communication signals with satellites into GNSS electrical signals that can be recognized and processed,
[0034] The existing GNSS circuit module 1 is most commonly a GPS module or a Beidou navigation module widely used in mobile intelligent devices such as mobile phones, or the cooperation of both. Its basic principle is the same as the working mechanism of existing such GPS modules or Beidou navigation modules, and no repetitive description will be given here.
[0035] The cellular circuit module 2 has a switch unit 21, a card slot unit 22, and a cellular processing unit 23 connected to the switch unit 21 and the card slot unit 22.
[0036] The cellular circuit module 2 is a functional module that usually processes the mobile communication call network signal of mobile terminals such as mobile phones, and is used to identify the position and signal strength of the base station communicating with the mobile terminal during positioning, and judge the positioning range.
[0037] The Bluetooth main control module 3 includes a Bluetooth main control unit 31. The Bluetooth main control unit 31 has a GNSS circuit module interface 311 and a cellular circuit module interface 312. The GNSS processing unit 11 is connected to the GNSS circuit module interface 311, and the cellular processing unit 23 is connected to the cellular circuit module interface 312.
[0038] In this embodiment, while adding Bluetooth positioning for precise positioning, the Bluetooth main control module 3 is used as the signal transceiver unit for multi-mode positioning signals to centrally perform signal transceiver of the GNSS circuit module 1 and the cellular circuit module 2 to the upper-layer software. The circuit module of this embodiment is used to convert and process signals and output signals. The selection or combination of positioning modes is processed by the upper-layer software for signals, and no detailed description will be given in this embodiment. It can be set with reference to the existing positioning and navigation software logic.
[0039] Since the GNSS circuit module 1 can only feedback a positioning within a range when the satellite signal is shielded or interfered, and at the same time the cellular circuit module 2 can only determine the approximate distance between the positioning device and the base station it communicates with, after combining Bluetooth positioning, according to the distance range of Bluetooth communication, it can be known that the positioning accuracy can be improved to within 10 meters, which fully compensates for the positioning accuracy problems of the GNSS circuit module 1 and the cellular circuit module 2, and also greatly simplifies the circuit structure.
[0040] Such as Figures 2 - 3As shown, in the circuit connection setting for the main signal interaction between the Bluetooth master control module 3, the GNSS circuit module 1, and the cellular circuit module 2, in this embodiment, the Bluetooth master control unit 31 includes a master GPS_RX interface 3111, a master GPS_TX interface 3112, a master 4G_RX interface 3121, and a master 4G_TX interface 3122; among them, the master GPS_RX interface 3111 and the master GPS_TX interface 3112 belong to the GNSS circuit module interface 311, and the master 4G_RX interface 3121 and the master 4G_TX interface 3122 belong to the cellular circuit module interface 312. The GNSS processing unit 11 includes a GPS_RX interface 111 connected to the master GPS_RX interface 3111 and a GPS_TX interface 112 connected to the master GPS_TX interface 3112; the cellular processing unit 23 includes a 4G_RX interface 231 connected to the master 4G_RX interface 3121 and a 4G_TX interface 232 connected to the master 4G_TX interface 3122.
[0041] Among them, the master GPS_RX interface 3111 is connected to the GPS_RX interface 111 and the master GPS_TX interface 3112 is connected to the GPS_TX interface 112 for sending and receiving GPS signals and control instructions between the GNSS processing unit 11 and the Bluetooth master control unit 31. The master 4G_RX interface 3121 is connected to the 4G_RX interface 311 and the master 4G_TX interface 3122 is connected to the 4G_TX interface 312 for the cellular processing unit 21 to send and receive 4G cellular network signals and control instructions to the Bluetooth master control unit 31.
[0042] Combined with Figure 4As shown, since the communication of GPS signals often involves the processing of signals and data such as latitude and longitude coordinates, altitude, terrain, roads, etc. compared to other positioning methods, and has a larger data volume, it is necessary to control the data volume transmitted between the GNSS processing unit 11 and the Bluetooth master unit 31 to prevent overflow due to exceeding the register capacity of the GNSS processing unit 11 and the Bluetooth master unit 31 and losing data. Therefore, in this embodiment, the Bluetooth master unit includes a master GPS_RTS interface 313 and a master GPS_CTS interface 314, and the GNSS processing unit 11 includes a GPS_RTS interface 113 connected to the master GPS_RTS interface 313 and a GPS_CTS interface 114 connected to the master GPS_CTS interface 314. The master GPS_RTS interface 313 is used for the Bluetooth master unit 31 to receive signals, indicating whether the serial port of the Bluetooth master unit 31 is ready to receive data. If the output signal is low level, it means that the serial port of the Bluetooth master unit 31 can receive data and requests to send data; when the receive register is full, the GPS_RTS interface 113 will be set to high level, and the master GPS_RTS interface 313 stops receiving data; the GPS_CTS interface 114 is an input signal interface of the GNSS processing unit 11, used to judge whether the serial port of the GNSS processing unit 11 can receive data sent by the Bluetooth master unit 31. If the received signal is low level, it means that the serial port of the Bluetooth master unit 31 can send data to the other party. If it is high level, it stops sending after sending the current data frame.
[0043] As Figure 5 As shown, in the first embodiment, the GNSS signal processing circuit 12 includes an antenna 121, a filtering unit 122 connected to the antenna 121, and an amplifying unit 123 connected to the filtering unit 122. The GNSS processing unit 11 has a GNSS signal input interface 115. The output end of the amplifying unit 123 is connected to the GNSS processing unit, and the GNSS processing unit has a GNSS signal input interface 115. In this embodiment, the GNSS signal processing circuit 12 is a signal processing circuit that receives GPS signals and converts them into available electrical signals, and is used for the conversion from the received microwave signals to electrical signals, as well as the filtering and amplification of the electrical signals to form electrical signals that can be processed by the GNSS processing unit 11.
[0044] Specifically, the filtering unit includes a filter with the model number B39162B8813D810; the amplifying unit includes an amplifier with the model number BGV8019.
[0045] As Figure 6As shown in the figure, in this embodiment, in the specific circuit design of the cellular circuit module 2, in the cellular circuit module 2, the cellular processing unit 23 has a USIM_DATA interface 231, a USIM_RST interface 232, and a USIM_CLK interface 233. The card slot unit 22 includes a card slot IO interface 221, a card slot RST interface 222, and a card slot CLK interface 223. The USIM_DATA interface is connected to the card slot IO interface, the USIM_RST interface is connected to the card slot RST interface, and the USIM_CLK interface is connected to the card slot CLK interface.
[0046] Based on the above embodiment, the following second embodiment is further proposed. The second embodiment has all the specific solutions of the modules and circuits in the above first embodiment. At the same time, as Figure 7 shown, the Bluetooth main control module 3 is further connected to a motion sensing circuit module 4. By further setting the motion sensing circuit module 4, on the basis of the functions realized by the above multi-mode positioning circuit, the signals of the attitude and motion state of the positioning device using the multi-mode positioning circuit can be further processed.
[0047] Specifically, as Figure 8 shown, in this second embodiment, the motion sensing circuit module 4 includes an acceleration motion sensor chip 41 of model LIS2DW12. The acceleration motion sensor chip 41 of LIS2DW12 has an SDA / SDI / SDO interface 411, an SDO / SA0 interface 412, a CS interface 413, and an SCL / SPC interface 414. The Bluetooth main control module 31 correspondingly has a LIS2DW12_MOSI interface 315, a LIS2DW12_MISO interface 316, a LIS2DW12_CS interface 317, and the LIS2DW12_SCK interface 318. The SDA / SDI / SDO interface 411 is connected to the LIS2DW12_MOSI interface 315, the SDO / SA0 interface 412 is connected to the LIS2DW12_MISO interface 316, the CS interface 413 is connected to the LIS2DW12_CS interface 317, and the SCL / SPC interface 414 is connected to the LIS2DW12_SCK interface 318.
[0048] The third embodiment of the present application provides a specific circuit implementation solution for a specific multi-mode positioning circuit. The following describes the specific circuit implementation of the main functional modules in combination with the technical solutions of the modules, units, interfaces, etc. in the above first embodiment and second embodiment.
[0049] Combined with Figure 1 、 Figures 9 - 11As shown, in the third embodiment, the Bluetooth master unit 31 is an nRF52840-AQFN-73 chip, and the Bluetooth master module 3 is a circuit module composed of an nRF52840-AQFN-73 chip and its peripheral circuits.
[0050] Optionally, the A10 pin of the nRF52840-AQFN-73 chip is the master GPS_RX interface 3111, the A12 pin is the master GPS_TX interface 3112, the A20 pin is the master GPS_RTS interface 313, the A22 pin is the master GPS_CTS interface 314, the AC10 pin is the master 4G_RX interface 3121, and the AC9 pin is the master 4G_TX interface 3122.
[0051] Optionally, the G1 pin of the nRF52840-AQFN-73 chip is the LIS2DW12_MOSI interface 315, the L1 pin is the LIS2DW12_MISO interface 316, the N1 pin is the LIS2DW12_CS interface 317, and the R1 pin is the LIS2DW12_SCK interface 318.
[0052] Optionally, the GNSS circuit module is a circuit module composed of an AT6558R chip as the GNSS processing unit 11 and its peripheral GNSS signal processing circuits 12;
[0053] Among them, the connection and working principle of the GNSS signal processing circuit 12 can be understood with reference to the relevant description in the first embodiment, combined with Figure 10 the examples, and will not be repeated here. Regarding the pin definitions of the AT6558R chip, pin B1 is the GPS_RX interface 111, pin B2 is the GPS_TX interface 112; pin C1 is the GPS_RTS interface 113, and pin C2 is the GPS_CTS interface 114.
[0054] Optionally, the cellular circuit module 2 is a circuit module with the Spreadtrum SC7701B as the cellular processing unit 23 as the core and its peripheral circuits. Among them, pin 11 is the USIM_DATA interface 231, pin 12 is the USIM_RST interface 232, and pin 13 is the USIM_CLK interface 233.
[0055] Optionally, the motion sensing circuit module 4 is a circuit composed of an LIS2DW12 chip and its peripheral circuits.
[0056] Optionally, pin 4 of the LIS2DW12 chip is the SDA / SDI / SDO interface 411, pin 3 is the SDO / SA0 interface 412, pin 2 is the CS interface 413, and pin 1 is the SCL / SPC interface 414.
[0057] Specifically, due to the numerous pin connection relationships in the specific circuit diagram of this embodiment, using connection lines to indicate the connections in the attached drawings will cause the lines to intersect with each other, making it difficult to identify the connection relationships. Therefore, the pin connection relationships between the chips shall be subject to the connection relationships described above, and no line connections will be made in the overall diagram. The chips in this embodiment are existing chips. The above embodiments only make specific simplification improvements to the circuit connection relationships, without making any changes to the functions and conventional connections of the chips themselves.
[0058] The above specific circuit analysis is mainly about the schematic diagram of the circuit connections related to the implementation of positioning signal processing. As the basic conditions for the circuit composition, the power supply circuit, charging circuit, and switch circuit, as the basic elements of the circuit, should also be included in the circuit of this embodiment. The specific circuit design can be referred to Figure 10 , and the specific working principle can be referred to the existing relevant circuit principles. No further analysis and description will be made in this embodiment.
[0059] The fourth embodiment of this application also discloses a multi-mode positioning device, which includes any one of the multi-mode positioning circuits in the first to third embodiments above. After adopting the multi-mode positioning circuit in the foregoing first aspect, the multi-mode positioning device has a complete multi-mode positioning signal processing and output function, and can independently execute the processing of positioning signals and data generation.
[0060] The fifth embodiment of this application also discloses a mobile communication device, which includes any one of the multi-mode positioning circuits in the first to third embodiments above.
[0061] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.
Claims
1. A multi-mode positioning circuit, comprising: A GNSS circuit module, comprising a GNSS processing unit and a GNSS signal processing circuit connected to the GNSS processing unit; A cellular circuit module comprises a switch unit, a card slot unit, and a cellular processing unit connected to the switch unit and the card slot unit; It is characterized in that it also includes a Bluetooth main control module, the Bluetooth main control module includes a Bluetooth main control unit, the Bluetooth main control unit has a GNSS circuit module interface and a cellular circuit module interface, the GNSS processing unit is connected to the GNSS circuit module interface, and the cellular processing unit is connected to the cellular circuit module interface.
2. The multimode positioning circuit according to claim 1, characterized in that: The Bluetooth main control unit includes a main control GPS_RX interface, a main control GPS_TX interface, a main control 4G_RX interface, and a main control 4G_TX interface; the GNSS processing unit includes a GPS_RX interface connected to the main control GPS_RX interface and a GPS_TX interface connected to the main control GPS_TX interface; the cellular processing unit includes a 4G_TX interface connected to the main control 4G_RX interface and a main control 4G_TX interface.
3. The multi-mode positioning circuit according to claim 2, characterized in that: The Bluetooth master control unit includes a master GPS_RTS interface and a master GPS_CTS interface, and the GNSS processing unit includes a GPS_RTS interface connected to the master GPS_RTS interface and a GPS_CTS interface connected to the master GPS_CTS interface.
4. The multi-mode positioning circuit according to claim 1, characterized in that: The GNSS processing unit is connected to a GNSS signal processing circuit including an antenna, a filtering unit connected to the antenna, and an amplifying unit connected to the filtering unit. The GNSS processing unit has a GNSS signal input interface, and the output end of the amplifying unit is connected to the GNSS signal input interface.
5. The multi-mode positioning circuit according to claim 4, characterized in that: The filtering unit includes a filter with a model number of B39162B8813D810; the amplifying unit includes an amplifier with a model number of BGV8019.
6. The multi-mode positioning circuit according to claim 1 or 2, characterized in that: The cellular processing unit has a USIM_DATA interface, a USIM_RST interface and a USIM_CLK interface, the card slot unit includes a card slot IO interface, a card slot RST interface and a card slot CLK interface, the USIM_DATA interface is connected to the card slot IO interface, the USIM_RST interface is connected to the card slot RST interface, and the USIM_CLK interface is connected to the card slot CLK interface.
7. The multi-mode positioning circuit according to claim 1, characterized in that: The Bluetooth main control module is also connected to a motion sensor circuit module.
8. The multi-mode positioning circuit according to claim 7, characterized in that: The motion sensing circuit module includes an acceleration motion sensor chip of model LIS2DW12, and the acceleration motion sensor chip LIS2DW12 has an SDA / SDI / SDO interface, an SDO / SA0 interface, a CS interface and an SCL / SPC interface. The Bluetooth main control module is correspondingly provided with a LIS2DW12_MOSI interface, a LIS2DW12_MISO interface, a LIS2DW12_CS interface and a LIS2DW12_SCK interface. The SDA / SDI / SDO interface is connected to the LIS2DW12_MOSI interface, the SDO / SA0 interface is connected to the LIS2DW12_MISO interface, the CS interface is connected to the LIS2DW12_CS interface, and the SCL / SPC interface is connected to the LIS2DW12_SCK interface.
9. A multi-mode positioning device, characterized in that: A multi-mode positioning circuit comprising any one of claims 1-8.
10. A mobile communication device, characterized in that A multi-mode positioning circuit comprising any one of claims 1-8.