A terminal switch of automobile bluetooth control

Abstract

This application relates to a terminal switch for automotive Bluetooth control, belonging to the field of automotive electronic control. It includes an electrical switch unit and a vehicle unit with signal connections. The electrical switch unit includes a USB module, a charging module, a power module, a DC-DC converter module, a button module, a first Bluetooth control module, and an LED module. The output of the USB module is electrically connected to the power module via the charging module. The output of the power module is electrically connected to the input of the DC-DC converter module, and the output of the DC-DC converter module is electrically connected to the power supply terminals of the button module and the LED module, respectively. The output of the button module is electrically connected to the control terminal of the first Bluetooth control module. The output of the power module is also electrically connected to the power supply terminal of the first Bluetooth control module, and the output of the first Bluetooth control module is electrically connected to the control terminal of the LED module. The vehicle unit includes a second Bluetooth control module and a signal conversion module, and the second Bluetooth control module and the first Bluetooth control module are signal connected. This application enables more convenient and intelligent vehicle control.

Description

Technical Field

[0001] This application relates to the technical field of automotive electronic control, and in particular to a terminal switch for automotive Bluetooth control. Background Technology

[0002] For the design of automotive control terminal switching circuits, traditional wired connections are typically used to achieve communication and control between various modules. A common approach is to directly connect each electrical module to the vehicle system using complex wiring harnesses. While this ensures signal transmission, it increases the complexity of internal wiring, occupies significant space, and makes installation and maintenance difficult. Another approach is to use simple switching circuits to control specific devices, but this method lacks flexibility and cannot achieve coordinated control and intelligent operation between multiple devices. Furthermore, traditional charging methods are often limited and cannot effectively adapt to different power inputs or manage battery charging efficiently. Utility Model Content

[0003] In order to enable more convenient and intelligent control of the vehicle body, this application provides a terminal switch for car Bluetooth control.

[0004] The technical solution for a car Bluetooth control terminal switch provided in this application is as follows: A terminal switch for automotive Bluetooth control includes an electrical switch unit and a vehicle unit connected by signals. The electrical switch unit includes a USB module, a charging module, a power module, a DC-DC converter module, a button module, a first Bluetooth control module, and an LED module. The output of the USB module is electrically connected to the power module through the charging module. The output of the power module is electrically connected to the input of the DC-DC converter module, and the output of the DC-DC converter module is electrically connected to the power supply terminals of the button module and the LED module, respectively. The output of the button module is electrically connected to the control terminal of the first Bluetooth control module. The output of the power module is also electrically connected to the power supply terminal of the first Bluetooth control module, and the output of the first Bluetooth control module is electrically connected to the control terminal of the LED module. The vehicle unit includes a second Bluetooth control module and a signal conversion module, and the second Bluetooth control module and the first Bluetooth control module are connected by signals.

[0005] By adopting the above technical solution, the circuit connection of the car Bluetooth control terminal switch is realized. The USB module charges the power module through the charging module. The power module supplies power to the DC-DC module and the first Bluetooth control module. The DC-DC module supplies power to the button module and the LED module. The button module can control the first Bluetooth control module. The first Bluetooth control module communicates wirelessly with the second Bluetooth control module and controls the LED module. The signal conversion module realizes the signal transmission between the whole vehicle system and the second Bluetooth control module, thereby realizing the car Bluetooth control of the terminal switch.

[0006] Preferably, the charging module includes a battery charging management chip, the input terminal of which is connected to the USB module, and the output terminal of which is connected to the power module.

[0007] By adopting the above technical solution and using a battery charging management chip, the charging process can be precisely controlled, effectively protecting the power module from damage such as overcharging, over-discharging, and overcurrent, thereby improving the power supply safety and reliability of the entire system.

[0008] Preferably, the DC-DC converter module includes a DC-DC converter chip U2 and its external components, as well as a power supply V1; pin 1 of the DC-DC converter chip U2 is electrically connected to the output terminal of the power supply module, the voltage output terminal of the power supply V1 is electrically connected to pin 2 of the DC-DC converter chip U2 through resistor R5, and pin 2 is also grounded through resistor R6; pin 3 of the DC-DC converter chip U2 is grounded, and pin 5 is electrically connected to pin 1 through inductor L1; pin 4 of the DC-DC converter chip U2 is set as the output terminal of the DC-DC converter module.

[0009] By adopting the above technical solution and using a DC-DC converter chip and its peripheral components, the voltage output by the power module can be efficiently converted into a stable DC voltage.

[0010] Preferably, the button module includes a switch and a voltage divider resistor. The output terminal of the DC-DC module is grounded through the voltage divider resistor and the switch in sequence. The connection point between the voltage divider resistor and the switch is electrically connected to the control terminal of the first Bluetooth control module.

[0011] By adopting the above technical solution, a simple level detection circuit is constructed, which can provide a high-level signal to the control terminal of the first Bluetooth control module when the switch is closed.

[0012] Preferably, the LED module includes at least one lighting sub-module, each of which includes an indicator light and an NPN transistor. The output terminal of the DC-DC module is electrically connected to the anode of the indicator light through the first resistor, and the cathode of the indicator light is electrically connected to the collector of the NPN transistor. The output terminal of the first Bluetooth control module is electrically connected to the base of the NPN transistor through the third resistor. The base of the NPN transistor is also grounded through the fourth resistor, and the emitter of the NPN transistor is grounded. The output terminal of the DC-DC module is also electrically connected to the anode of the indicator light through the second resistor.

[0013] By adopting the above technical solution and using an NPN transistor as an electronic switch, the output of the first Bluetooth control module only needs to output a small base current to control the transistor to saturate and conduct, thus allowing a larger collector current to flow through the indicator light and enabling it to light up normally. Specifically, the first and second resistors are used to limit the current to the indicator light to prevent overcurrent damage. The fourth resistor provides a pull-down resistor to the base, ensuring reliable cutoff of the transistor when there is no input, preventing accidental lighting.

[0014] Preferably, the lighting submodule further includes a bypass capacitor, one end of which is electrically connected to the anode of the indicator light, and the other end of which is electrically connected to the cathode of the indicator light.

[0015] By adopting the above technical solution and setting a bypass capacitor, a transient current path can be provided for the indicator light when it is quickly turned on and off, reducing the current surge on the power line and thus suppressing power voltage fluctuations and electromagnetic interference caused by the current surge.

[0016] Preferably, the signal conversion module includes a LIN conversion submodule and a CAN conversion submodule. The LIN conversion submodule includes a LIN transceiver and its peripheral components, and the CAN conversion submodule includes a CAN transceiver and its peripheral components. The first interfaces of the LIN transceiver and the CAN transceiver are respectively connected to the LIN bus and the CAN bus of the vehicle, and the second interfaces of both are connected to the signal input of the second Bluetooth control module.

[0017] By adopting the above technical solution, the wireless commands received by the second Bluetooth control module can be converted into signals conforming to the vehicle's LIN or CAN bus protocol format and sent to the corresponding vehicle controller for execution; conversely, signals from the vehicle bus can also be converted into signals that the Bluetooth module can receive and wirelessly transmitted.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. By dividing the system into Bluetooth-connected electrical switch units and vehicle units, the constraints of physical wiring harnesses are eliminated, the installation process is simplified, the flexibility of equipment layout is improved, and the complexity and cost of vehicle wiring harnesses are reduced. 2. By integrating USB charging, battery management chip and DC-DC switching power supply circuit, safe and efficient charging of internal battery and multi-channel precise voltage regulation output are achieved, which not only meets the battery life requirements of low power Bluetooth devices, but also provides a clean and stable power supply for peripheral circuits such as buttons and indicator lights, ensuring the accuracy of signal acquisition and display. 3. By integrating LIN and CAN transceivers, the system can convert wireless Bluetooth commands into level signals that conform to the vehicle's standard bus protocol, and vice versa, thereby achieving reliable communication with the vehicle's electronic control unit. This enables the electrical switching unit to not only send commands but also receive and display vehicle status feedback, achieving intelligent interaction. Attached Figure Description

[0019] Figure 1 This is a schematic block diagram of an embodiment of this application; Figure 2 This is a circuit diagram of the USB module in an embodiment of this application; Figure 3 This is a circuit diagram of the charging module in an embodiment of this application; Figure 4 This is a circuit diagram of the DC-DC module in an embodiment of this application; Figure 5 This is a circuit diagram of the first Bluetooth control module in an embodiment of this application; Figure 6 This is a circuit diagram of the button module in an embodiment of this application; Figure 7 This is a schematic block diagram of the LED module in an embodiment of this application; Figure 8 This is a circuit diagram of the lamp-lighting submodule in an embodiment of this application; Figure 9 This is a circuit diagram of the second Bluetooth control module in an embodiment of this application; Figure 10 This is a circuit diagram of the CAN conversion submodule in an embodiment of this application; Figure 11 This is a circuit diagram of the LIN conversion submodule in an embodiment of this application.

[0020] Reference numerals: 1. Electrical switch unit; 11. USB module; 12. Charging module; 13. Power supply module; 14. DC-DC module; 15. Button module; 16. First Bluetooth control module; 17. LED module; 171. Lighting sub-module; 2. Vehicle unit; 21. Second Bluetooth control module; 22. Signal conversion module; 221. CAN conversion sub-module; 222. LIN conversion sub-module. Detailed Implementation

[0021] The following combination Figures 1-11 This application will be described in further detail.

[0022] This application discloses a terminal switch for car Bluetooth control.

[0023] Reference Figure 1 A terminal switch for automotive Bluetooth control includes an electrical switch unit 1 and a vehicle unit 2 connected by signals. The electrical switch unit 1 includes a USB module 11, a charging module 12, a power module 13, a DC-DC converter module 14, a button module 15, a first Bluetooth control module 16, and an LED module 17. The output of the USB module 11 is electrically connected to the power module 13 via the charging module 12, enabling the power module 13 to be charged. The output of the power module 13 is electrically connected to the input of the DC-DC converter module 14, and the output of the DC-DC converter module 14 is electrically connected to the power supply terminals of the button module 15 and the LED module 17, respectively. The output of the button module 15 is electrically connected to the control terminal of the first Bluetooth control module 16. The output of the power module 13 is also electrically connected to the power supply terminal of the first Bluetooth control module 16, and the output of the first Bluetooth control module 16 is electrically connected to the control terminal of the LED module 17. The vehicle unit 2 includes a second Bluetooth control module 21 and a signal conversion module 22, which includes a LIN conversion submodule 222 and a CAN conversion submodule 221. The second Bluetooth control module 21 is connected to the first Bluetooth control module 16 via signal, enabling Bluetooth interaction between the electrical switch unit 1 and the vehicle unit 2.

[0024] refer to Figure 2 The USB module 11 includes a connector and peripheral components. In this embodiment, a Type-C connector is used. Type-C connectors have advantages such as small size, high transmission speed, and reversible insertion, making them easy to connect to external power supply devices. Alternatively, other types of connectors, such as Micro-USB connectors, can be used, as long as they enable electrical connection and signal transmission with external power supply devices. Pins 11 and 2 of the Type-C connector are electrically connected to the voltage output terminal of the external power supply device and the input terminal of the charging module 12, respectively, to introduce external power into the circuit.

[0025] refer to Figure 3The charging module 12 includes a battery charging management chip U1 and its peripheral components. Pin 1 of the battery charging management chip U1 is the input terminal of the charging module 12. Pin 2 of the battery charging management chip U1 is grounded through resistor R1, pin 5 is grounded through capacitor C1, pin 6 is grounded through resistor R2 and adjustable resistor R3 respectively, pin 7 is grounded through resistor R4, pin 9 is grounded, and pin 8 is set as the output terminal of the charging module 12. The charging module 12 is used to convert the voltage output by the USB module 11 into a voltage suitable for the power module 13, thereby charging the power module 13. In this embodiment, the power module 13 is set as a lithium battery, which has advantages such as high energy density and long life. Alternatively, the power module 13 can also use other types of batteries, such as lead-acid batteries.

[0026] refer to Figure 4 The DC-DC module 14 includes a DC-DC converter chip U2, its external components, and a power supply V1. In this embodiment, the output voltage of the power supply V1 is 5V. Pin 1 of the DC-DC converter chip U2 is electrically connected to the output terminal of the power supply module 13. The voltage output terminal of the power supply V1 is electrically connected to pin 2 of the DC-DC converter chip U2 through resistor R5, and pin 2 is also grounded through resistor R6. Pin 3 of the DC-DC converter chip U2 is grounded, pin 5 is electrically connected to pin 1 through inductor L1, and pin 4 is set as the output terminal VDD of the DC-DC module 14, and pin 4 is also grounded through capacitor C2. The output terminal of the DC-DC module 14 forms a closed-loop voltage regulation circuit through external components, which can convert the voltage output by the power supply module 13 into a stable voltage to power the button module 15 and the LED module 17. In this embodiment, the output terminal of the DC-DC module 14 provides a 5V DC voltage to the power supply terminals of the button module 15 and the LED module 17 through external components.

[0027] refer to Figure 5 The first Bluetooth control module 16 includes a Bluetooth control chip and its peripheral components. In this embodiment, the Bluetooth control chip is a Bluetooth communication chip that supports GFSK modulation, meets the Bluetooth 5.1 protocol, and operates in the 2.4~2.484GHz frequency band. This Bluetooth communication chip has advantages such as low power consumption and fast transmission speed, and can realize wireless connection and signal transmission with the second Bluetooth control module 21.

[0028] Reference Figure 6 The button module 15 includes a switch S1 and a voltage divider resistor R7. The output terminal VDD is grounded through the voltage divider resistor R7 and the switch S1 in sequence. The connection between the voltage divider resistor R7 and the switch S1 is electrically connected to the control terminal of the first Bluetooth control module 16. When the switch S1 is closed, the control terminal of the Bluetooth control chip U3 detects a low potential and identifies it as a valid press. At this time, the first Bluetooth control module 16 sends a signal corresponding to the key value to the second Bluetooth control module 21 via Bluetooth.

[0029] Reference Figure 7 and Figure 8 The LED module 17 includes multiple lighting sub-modules 17117LED14DCDC11USB, and the control terminals of these sub-modules correspond to multiple output terminals of the first Bluetooth control module 16. The lighting sub-modules 17117LED14DCDC11USB include an indicator LED1, a bypass capacitor C3, and an NPN transistor Q1. The output terminal VDD of the DCDC module 14 is electrically connected to the anode of the indicator LED1 through a first resistor R8 and a second resistor R9, respectively. The cathode of the indicator LED1 is electrically connected to the collector of the NPN transistor Q1. One end of the bypass capacitor C3 is electrically connected to the anode of the indicator LED1, and the other end is electrically connected to the cathode of the indicator LED1. The output terminal of the first Bluetooth control module 16 is electrically connected to the base of the NPN transistor Q1 through a third resistor R10. The base of the NPN transistor Q1 is also grounded through a fourth resistor R11, and the emitter of the NPN transistor Q1 is grounded.

[0030] When the first Bluetooth control module 16 receives the lighting signal output by the second Bluetooth control module 21, the output terminal of the first Bluetooth control module 16 and the lighting signal output a high level. At this time, the NPN transistor Q1 of the lighting sub-module 17117LED14DCDC11USB corresponding to the lighting signal is turned on, thereby lighting up the indicator LED1 of the lighting sub-module 17117LED14DCDC11USB.

[0031] refer to Figure 9 The second Bluetooth control module 21 and the first Bluetooth control module 16 have the same structure and both meet the Bluetooth 5.1 protocol, enabling wireless communication with the first Bluetooth control module 16.

[0032] refer to Figure 10 and Figure 11 The LIN conversion submodule 222 includes a LIN transceiver U3 and its peripheral components, and the CAN conversion submodule 221 includes a CAN transceiver U4 and its peripheral components. The first interface of the LIN transceiver is electrically connected to the LIN bus of the vehicle system, and the second interface is electrically connected to the signal input terminal of the second Bluetooth control module 21. The first interface of the CAN transceiver is electrically connected to the CAN bus of the vehicle system, and the second interface is electrically connected to the signal input terminal of the second Bluetooth control module 21. The LIN transceiver is used to convert the vehicle's LIN signals into UART analog signals, and can also convert UART analog signals into LIN signals; the CAN transceiver is used to convert the vehicle's CAN signals into UART analog signals, and can also convert UART analog signals into CAN signals.

[0033] When switch S1 is triggered, the first Bluetooth control module 16 receives the trigger signal and sends the corresponding key value signal via Bluetooth to the second Bluetooth control module 21. The second Bluetooth control module 21 then sends the key value signal to the vehicle system via signal conversion module 22. When the vehicle system sends a lighting signal, the lighting signal is converted into an analog signal by the signal conversion unit and sent to the second Bluetooth control module 21. Upon receiving the lighting signal, the second Bluetooth control module 21 sends it via Bluetooth to the first Bluetooth control module 16. The first Bluetooth control module 16 then sends the corresponding key value signal to the LED module 17, causing one or more indicator lights (LED1) to illuminate.

[0034] The implementation principle of a terminal switch for automotive Bluetooth control in this embodiment is as follows: A user generates a trigger signal by operating the button module 15 on the electrical switch unit 1. This signal is collected and identified by the first Bluetooth control module 16, and then transmitted wirelessly to the second Bluetooth control module 21 within the vehicle unit 2. The second Bluetooth control module 21 receives and parses the instruction, converts it into an electrical signal conforming to the vehicle's LIN or CAN bus protocol format via the signal conversion module 22, and sends it to the corresponding electronic control unit of the vehicle for execution, thereby realizing remote wireless vehicle control. Conversely, when the vehicle status changes, the vehicle's electronic control unit sends a status signal via the LIN or CAN bus. This signal is converted by the signal conversion module 22 and received by the second Bluetooth control module 21, then wirelessly transmitted to the first Bluetooth control module 16 via Bluetooth. The first Bluetooth control module 16 drives the corresponding indicator light in the LED module 17 to illuminate or extinguish according to the received status information, thus providing the user with intuitive status feedback. The entire system replaces traditional physical wiring harnesses with Bluetooth wireless connection, realizing intelligent and convenient control and status display of the vehicle's electrical equipment.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A terminal switch for automotive Bluetooth control, characterized by: Includes an electrical switching unit (1) for signal connection and a vehicle unit (2); The electrical switch unit (1) includes a USB module (11), a charging module (12), a power module (13), a DC-DC module (14), a button module (15), a first Bluetooth control module (16), and an LED module (17). The output of the USB module (11) is electrically connected to the power module (13) through the charging module (12). The output of the power module (13) is electrically connected to the input of the DC-DC module (14), and the output of the DC-DC module (14) is electrically connected to the power supply terminals of the button module (15) and the LED module (17). The output of the button module (15) is electrically connected to the control terminal of the first Bluetooth control module (16). The output of the power module (13) is also electrically connected to the power supply terminal of the first Bluetooth control module (16), and the output of the first Bluetooth control module (16) is electrically connected to the control terminal of the LED module (17). The vehicle unit (2) includes a second Bluetooth control module (21) and a signal conversion module (22), and the second Bluetooth control module (21) and the first Bluetooth control module (16) are connected by signals.

2. The terminal switch of claim 1, wherein: The charging module (12) includes a battery charging management chip, the input terminal of which is connected to the USB module (11), and the output terminal of which is connected to the power module (13).

3. The terminal switch of claim 1, wherein: the terminal switch is a Bluetooth controlled terminal switch for a vehicle. The DC-DC module (14) includes a DC-DC converter chip U2 and its external components and a power supply V1; pin 1 of the DC-DC converter chip U2 is electrically connected to the output terminal of the power supply module (13), the voltage output terminal of the power supply V1 is electrically connected to pin 2 of the DC-DC converter chip U2 through resistor R5, and pin 2 is also grounded through resistor R6; pin 3 of the DC-DC converter chip U2 is grounded, and pin 5 is electrically connected to pin 1 through inductor L1; pin 4 of the DC-DC converter chip U2 is set as the output terminal of the DC-DC module (14).

4. The terminal switch for automotive Bluetooth control according to claim 1, characterized in that: The button module (15) includes a switch and a voltage divider resistor. The output terminal of the DC-DC module (14) is grounded through the voltage divider resistor and the switch in sequence. The connection point between the voltage divider resistor and the switch is electrically connected to the control terminal of the first Bluetooth control module (16).

5. The terminal switch of claim 1, wherein: the terminal switch is a Bluetooth controlled terminal switch for a vehicle. The LED module (17) includes at least one lighting sub-module (171), each of the lighting sub-modules (171) includes an indicator light and an NPN transistor. The output terminal of the DC-DC module (14) is electrically connected to the anode of the indicator light through a first resistor, and the cathode of the indicator light is electrically connected to the collector of the NPN transistor. The output terminal of the first Bluetooth control module (16) is electrically connected to the base of the NPN transistor through a third resistor. The base of the NPN transistor is also grounded through a fourth resistor, and the emitter of the NPN transistor is grounded. The output terminal of the DC-DC module (14) is also electrically connected to the anode of the indicator light through a second resistor.

6. The terminal switch of a car Bluetooth control according to claim 5, characterized in that: The lighting submodule (171) also includes a bypass capacitor, one end of which is electrically connected to the anode of the indicator light, and the other end of which is electrically connected to the cathode of the indicator light.

7. The terminal switch of claim 1, wherein: the terminal switch is a Bluetooth controlled terminal switch for a vehicle. The signal conversion module (22) includes a LIN conversion submodule (222) and a CAN conversion submodule (221). The LIN conversion submodule (222) includes a LIN transceiver and its peripheral components, and the CAN conversion submodule (221) includes a CAN transceiver and its peripheral components. The first interfaces of the LIN transceiver and the CAN transceiver are respectively connected to the LIN bus and CAN bus of the vehicle, and the second interfaces are both connected to the signal input terminal of the second Bluetooth control module (21).

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