Vehicle-mounted Bluetooth earphone communication system integrated with Hall sensor
By integrating Hall sensors into car Bluetooth headsets, the functions of automatically answering and hanging up calls are solved, and the inconvenience and privacy and security of existing car Bluetooth headsets are improved, improving convenience and security during driving.
Patent Information
- Application Number
- CN202411355405.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-01-14
AI Technical Summary
Existing vehicle-mounted Bluetooth headsets are inconvenient to use during driving, and cannot effectively isolate the call content, resulting in the risk of privacy leakage and complex operation, which may cause safety risks.
Integrate Hall sensors and dedicated software to automatically answer or hang up calls by detecting the position of the headset, simplifying operational processes and improving privacy protection and driving safety.
It realizes quick answering or hanging up calls without manual operation, improves convenience of use and privacy protection, and ensures safety and call stability during driving.
Smart Images
Figure CN119316768A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of Bluetooth headsets, and in particular relates to a vehicle-mounted Bluetooth headset call system integrated with a Hall sensor, which aims to improve the convenience, privacy and safety of answering calls during driving. Background Art
[0002] Bluetooth technology has been widely used in modern life, especially in the automotive field, where it provides drivers with the convenience of wireless communication. However, the existing in-car Bluetooth usually communicates externally, which is inconvenient to use in certain scenarios. For example, when a driver receives a private call, the traditional in-car Bluetooth cannot effectively isolate passengers from hearing the driver's call content, resulting in the risk of privacy leakage.
[0003] In addition, ordinary Bluetooth headsets are relatively complicated to operate, with cumbersome pairing steps and difficult-to-distinguish function buttons. Users need to manually press buttons to answer or hang up calls, which may even cause safety hazards. Traditional headsets cannot automatically switch to the headset device when handling private calls, which may cause the content of the call to be heard by other passengers, and cannot meet the user's demand for private calls.
[0004] In view of the above problems, the introduction of Hall sensors can significantly improve the user experience of in-car Bluetooth headsets. By integrating Hall sensors and dedicated software development, when the user takes the headset out of the charging base, the headset can automatically answer the call and automatically hang up when it is put back into the charging base. This design not only simplifies the operation process and improves driving safety, but also enhances privacy protection, which is particularly suitable for handling private calls during driving. Summary of the invention
[0005] The present invention provides a vehicle-mounted Bluetooth headset call system integrated with a Hall sensor, which solves the technical problems of the existing Bluetooth headsets having a single connection mode and inconvenient use, and solves the privacy and security problems caused by the driver making phone calls while the car is driving.
[0006] Specifically, the vehicle-mounted Bluetooth headset call system with integrated Hall sensor is characterized in that the vehicle-mounted Bluetooth system includes a vehicle-mounted hands-free Bluetooth, a vehicle-mounted Bluetooth headset set, a Bluetooth headset, a charging base, a Hall sensor, and an MCU; The in-car hands-free Bluetooth is connected to the mobile phone via the Bluetooth for playing music on the mobile phone; The in-vehicle Bluetooth headset set has a new answering method: the Hall sensor is used as an answering switch.
[0007] In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Bluetooth headset is electrically connected to the charging base and the vehicle electrical system; The Hall sensor is used to detect whether the Bluetooth headset is in the charging base and output a corresponding signal to the MCU; The mobile phone is used to establish a Bluetooth connection with the Bluetooth headset and answer calls through the Bluetooth protocol; The charging base converts the vehicle power into a 5V DC power supply for powering the Bluetooth headset; In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Hall sensor is used to detect whether the Bluetooth headset is in the charging base; When the Bluetooth headset leaves the charging base, the magnetic flux lines passing through the Hall sensor are reduced, thereby sending a high level to the MCU, and the Bluetooth headset answers the call; When the Bluetooth headset returns to the charging base, the magnetic flux lines passing through the Hall sensor increase, thereby sending a low level to the MCU, and the Bluetooth headset hangs up the call; According to the state of the Hall sensor, the Bluetooth headset manages answering and hanging up of mobile phone calls; The high response speed of the Hall sensor ensures the immediacy of user operations, making the use of Bluetooth headsets smoother, ensuring that users can quickly answer and hang up calls, and improving the overall user experience.
[0008] In the in-vehicle Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Bluetooth headset is configured to support only Bluetooth HFP (hands-free protocol), HSP (headset protocol) and AVRCP (audio and video remote control protocol), and disable A2DP (advanced audio distribution protocol) to realize the call function without music playback; The HFP protocol is used to implement a hands-free calling function between Bluetooth devices, such as a call between a Bluetooth headset and a mobile phone; The HSP protocol is used for call functions and provides the basic functions required for communication between the Bluetooth headset and the mobile phone; The AVRCP protocol is used to switch between call audio and music audio between Bluetooth devices; The MCU informs the mobile phone of the change of the audio stream through the AVRCP protocol and requests the mobile phone to pause or resume music playback; The enabling and disabling of the A2DP protocol is controlled by an API or command of the Bluetooth stack; if the A2DP protocol is disabled, music will no longer be played on the Bluetooth headset; By focusing on the processing of call data packets, the system can more effectively manage Bluetooth communication resources, reduce delays or interference caused by processing non-essential data, and thus improve the sound quality and stability of calls. This is especially important for users who need clear, interference-free calls while driving.
[0009] In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Bluetooth headset is electrically connected to the charging base and the vehicle electrical system; The in-vehicle Bluetooth system is connected to the mobile phone via Bluetooth. When the vehicle is started, the in-vehicle Bluetooth system is turned on and a connection is established with the mobile phone via the Bluetooth protocol; When the vehicle is turned off, the vehicle-mounted Bluetooth system automatically shuts down and disconnects from the mobile phone; The stability and long-term use of the vehicle-mounted Bluetooth system are ensured.
[0010] In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that when the input voltage of the Bluetooth headset is greater than the power supply low voltage detection threshold and the chip enable input terminal is connected to a high level, the charging base charges the Bluetooth headset; The voltage of the Bluetooth headset is lower than 3V, and the charging base uses a trickle current to pre-charge the Bluetooth headset; When the voltage of the Bluetooth headset exceeds 3V, the charging base uses a constant current mode to charge the Bluetooth headset; When the voltage of the Bluetooth headset is close to 4.2V, the charging base stops charging the Bluetooth headset.
[0011] In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that the mobile phone is connected to the vehicle-mounted Bluetooth system via Bluetooth, the mobile phone transmits the music audio stream to the vehicle-mounted hands-free Bluetooth via the A2DP protocol, and the vehicle-mounted hands-free Bluetooth plays music; The mobile phone remains connected to the Bluetooth headset, but the Bluetooth headset disables the A2DP protocol and thus does not play music; When the mobile phone receives an incoming call, the mobile phone sends an SCU command to the Bluetooth headset, and the mobile phone switches the call audio to the Bluetooth headset through the HFP protocol, and the user can answer the call by picking up the Bluetooth headset; The call can be ended by putting the Bluetooth headset back into the charging base, and the car-mounted hands-free Bluetooth continues to play music.
[0012] No need to manually switch devices, the seamless switching between Bluetooth headsets and car hands-free Bluetooth provides a more convenient calling experience.
[0013] In the vehicle-mounted Bluetooth headset call system with integrated Hall sensor, it is characterized in that the control function of the Bluetooth headset is implemented by software firmware, and the firmware only processes data packets related to the call and filters data packets of other Bluetooth protocols; At the firmware level, it is necessary to ensure that the Bluetooth headset only processes data packets of the HFP / HSP protocol and does not process data packets of the A2DP protocol; For the AVRCP protocol, only necessary control commands are implemented, such as answering and hanging up calls; This feature ensures the system's efficiency and focus when processing call data, and effectively filters out other non-call related Bluetooth protocol data packets, such as audio streaming transmission (non-call audio), device status updates, etc., thereby reducing the system's processing burden and improving call stability and clarity.
[0014] Compared with ordinary Bluetooth headsets: the present invention reduces manual operations, and the automatic answering and hanging up functions eliminate the need for drivers to be distracted by manual operations, thereby improving driving safety; there is no need to manually switch devices, and the seamless switching between the Bluetooth headset and the in-vehicle hands-free Bluetooth provides a more convenient calling experience; the high sensitivity and low power consumption characteristics of the Hall sensor ensure the stability and long-term use of the system. The present invention completely eliminates the user's reliance on physical buttons during driving through the automatic detection of the Hall sensor, thereby significantly improving the convenience of operation and driving safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Attached Figure 1 It is a structural diagram of a car Bluetooth headset call system with integrated Hall sensor.
[0016] Attached Figure 2 The present invention is a schematic diagram of a Hall sensor control method of a vehicle-mounted Bluetooth headset call system with integrated Hall sensor.
[0017] Attached Figure 3 It is a flow chart of the method for connecting a vehicle-mounted Bluetooth headset call system with an integrated Hall sensor.
[0018] Attached Figure 4 This is a physical schematic diagram of a car Bluetooth headset set of a car Bluetooth headset call system with integrated Hall sensor.
[0019] Among them, 1. Car Bluetooth system; 10. Car hands-free Bluetooth; 20. Car Bluetooth headset set; 200. Bluetooth headset; 210. Charging base; Hall sensor. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples.
[0021] The present invention provides a vehicle-mounted Bluetooth headset call system integrated with a Hall sensor, which solves the technical problems of the existing Bluetooth headsets having a single connection mode and inconvenient use, and solves the privacy and security problems caused by the driver making phone calls while the car is driving.
[0022] Embodiment 1:
[0023] Combination Figure 1 As shown, the in-vehicle Bluetooth system (1) comprises an in-vehicle hands-free Bluetooth (10), an in-vehicle Bluetooth headset set (20), a Bluetooth headset (200), a charging base (210), and a Hall sensor; Combination Figure 2 As shown, the in-vehicle Bluetooth headset set (20) has a new answering method, that is, the Hall sensor is used as an answering switch; This new answering method is based on the application of Hall sensor, in which the software logic inside the system performs corresponding operations according to the detection results of the Hall sensor. This intelligent control logic enables the headset to manage calls autonomously without the user's active operation. This process includes: Take out the earphones → Hall sensor detects → MCU receives the signal → activates the Bluetooth module → answers the call; Put the earphone back → Hall sensor detects → MCU receives signal → hang up the call → Bluetooth module turns off; The realization of buttonless operation mainly relies on the Hall sensor to detect the position status of the Bluetooth headset. When the Bluetooth headset is taken out of the charging base, the Hall sensor detects the change in the magnetic field and sends a signal to the control module of the Bluetooth headset to automatically execute the answering operation. Conversely, when the Bluetooth headset is put back into the charging base, the Hall sensor detects the state change and instructs the system to hang up the call.
[0024] The in-vehicle Bluetooth headset call system with integrated Hall sensor is characterized in that when the mobile phone receives an incoming call, the mobile phone sends an SCU instruction to the Bluetooth headset (200), and the mobile phone switches the call audio to the Bluetooth headset (200) through the AVRCP protocol, and the user can answer the incoming call by picking up the Bluetooth headset (200); the call can be hung up by placing the Bluetooth headset (200) back into the charging base (210), and the in-vehicle hands-free Bluetooth (10) will continue to play music; there is no need to manually switch devices, and the seamless switching between the Bluetooth headset (200) and the in-vehicle hands-free Bluetooth (10) provides a more convenient call experience.
[0025] The high sensitivity of the Hall sensor ensures the real-time and stability of the call. After the Hall sensor detects that the Bluetooth headset (200) is taken out of the charging base (210), the response time is less than 1 second, and the MCU is immediately triggered to activate the Bluetooth module. The control module sends a call request to the mobile phone through the Bluetooth protocol stack to take over the current call. In a multi-device environment, the Bluetooth headset (200) gives priority to the HFP connection with the mobile phone, ensuring the real-time and stability of the call.
[0026] In addition, the Hall sensor has low power consumption and is durable, which is suitable for application scenarios such as car Bluetooth headsets that have high requirements for power consumption and reliability. The operating current of the Hall sensor is very low, generally in the microampere (μA) to milliampere (mA) level. The Hall sensor does not require continuous power supply in many applications. It can be powered by the I / O pin of the MCU and turned off when the headset enters the standby state. When the headset is detected to be taken out or put back into the charging base, it will be temporarily powered and the sensor will be activated, and it will return to the low power state immediately after the detection is completed. The Hall sensor has strong immunity to environmental factors such as temperature, humidity and dust, and can work stably in a wide temperature range, usually between -40℃ and 85℃. This is particularly important for the in-vehicle environment; due to the lack of mechanical wear and contact loss, the Hall sensor has a very long service life and can withstand a large number of operating cycles. This can significantly improve the overall life of the system in car Bluetooth headsets that require frequent operation.
[0027] Combination Figure 3 As shown, in the in-vehicle Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Bluetooth headset (200) is configured to only support Bluetooth HFP (Hands-Free Protocol), HSP (Headset Protocol) and AVRCP (Audio and Video Remote Control Protocol), and disable A2DP (Advanced Audio Distribution Protocol) to achieve the call function without playing music; The HFP protocol is used to implement a hands-free calling function between Bluetooth devices, such as a call between a Bluetooth headset (200) and a mobile phone; the HSP protocol is used for the calling function, and provides the basic functions required for communication between the Bluetooth headset (200) and the mobile phone; the AVRCP protocol is used to switch between calling audio and music audio between Bluetooth devices; the MCU informs the mobile phone of the change of the audio stream through the AVRCP protocol, and requests the mobile phone to pause or resume music playback; the enabling and disabling of the A2DP protocol is controlled by an API or command of the Bluetooth stack, and disabling the A2DP protocol means that music is no longer played on the Bluetooth headset (200); The enabling and disabling of the A2DP protocol is implemented through the Bluetooth stack API. When the headset is answering a call, the API is automatically called to disable the A2DP protocol to ensure that audio transmission is only through the HFP and HSP protocols.
[0028] This feature ensures the system's efficiency and focus when processing call data, effectively filtering out other non-call-related Bluetooth protocol packets, such as audio streaming (non-call audio), device status updates, etc., thereby reducing the system's processing burden and improving call stability and clarity. By focusing on the processing of call data packets, the system can more effectively manage Bluetooth communication resources, reduce delays or interference caused by processing non-essential data, and thus improve the sound quality and stability of calls. This is especially important for users who need clear, interference-free calls while driving.
[0029] Combination Figure 4 As shown, in the in-vehicle Bluetooth headset call system with integrated Hall sensor, it is characterized in that the Bluetooth headset (200) is electrically connected to the charging base (210) and the vehicle electrical system; the charging base (210) converts the vehicle power supply into a 5V DC power supply for powering the Bluetooth headset (200); When the input voltage of the Bluetooth headset (200) is greater than a power supply low voltage detection threshold and the chip enable input terminal is connected to a high level, the charging base (210) charges the Bluetooth headset (200); The voltage of the Bluetooth headset (200) is lower than 3V, and the charging base (210) uses a trickle current to pre-charge the Bluetooth headset (200); When the voltage of the Bluetooth headset (200) exceeds 3V, the charging base (210) uses a constant current mode to charge the Bluetooth headset (200); When the voltage of the Bluetooth headset (200) is close to 4.2V, the charging base (210) stops charging the Bluetooth headset (200); The in-vehicle Bluetooth system (1) is connected to a mobile phone via Bluetooth. When the vehicle is started, the in-vehicle Bluetooth system (1) is turned on and a connection is established with the mobile phone via the Bluetooth protocol. When the vehicle is turned off, the in-vehicle Bluetooth system (1) is automatically turned off and disconnected from the mobile phone, thereby ensuring the stability and long-term use of the in-vehicle Bluetooth system (1).
[0030] Compared with ordinary Bluetooth headsets: the present invention reduces manual operations, and the automatic answering and hanging up functions eliminate the need for drivers to be distracted by manual operations, thereby improving driving safety; there is no need to manually switch devices, and the seamless switching between the Bluetooth headset and the in-car hands-free Bluetooth provides a more convenient calling experience; the high sensitivity and low power consumption characteristics of the Hall sensor ensure the stability and long-term use of the system. After detecting the status of the headset, the Hall sensor will enter a low-power mode to ensure that the battery life of the headset is maximized. At the same time, its design without mechanical parts ensures the long life of the sensor in a frequent operation environment.
[0031] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. The vehicle-mounted Bluetooth headset call system with integrated Hall sensor is characterized in that: include: A Bluetooth headset, connected to the phone via Bluetooth, for processing call audio; A charging base, connected to the vehicle power system, for holding and charging the Bluetooth headset; A Hall sensor is built into the charging base and is used to detect the status of the Bluetooth headset; a control module is electrically connected to the Hall sensor and the Bluetooth headset; Among them, the Hall sensor detects that when the Bluetooth headset is taken out of the charging base, it sends a signal to the control module, and the control module activates the Bluetooth module and takes over the current call of the mobile phone; When the Hall sensor detects that the Bluetooth headset is put back into the charging base, it sends a signal to the control module, and the control module instructs the Bluetooth headset to hang up the call, but the headset Bluetooth remains connected to the mobile phone.
2. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor according to claim 1, characterized in that , the Bluetooth headset is electrically connected to the charging base and the vehicle electrical system; The Hall sensor is used to detect whether the Bluetooth headset is in the charging base and output a corresponding signal to the MCU; The mobile phone is used to establish a Bluetooth connection with the Bluetooth headset and answer calls through the Bluetooth protocol; The charging base converts the vehicle power into a 5V DC power supply for powering the Bluetooth headset.
3. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor according to claim 2 is characterized in that , the Hall sensor is used to detect whether the Bluetooth headset is in the charging base; When the Bluetooth headset leaves the charging base, the magnetic flux lines passing through the Hall sensor are reduced, thereby sending a high level to the MCU, and the Bluetooth headset answers the call; When the Bluetooth headset returns to the charging base, the magnetic flux lines passing through the Hall sensor increase, thereby sending a low level to the MCU, and the Bluetooth headset hangs up the call; According to the state of the Hall sensor, the Bluetooth headset manages answering and hanging up of mobile phone calls.
4. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor according to claim 2, characterized in that: The Bluetooth headset is configured to support only Bluetooth HFP (hands-free protocol), HSP (headset protocol) and AVRCP (audio and video remote control protocol), and disable A2DP (advanced audio distribution protocol) to achieve call function without music playback; The HFP protocol is used to implement a hands-free calling function between Bluetooth devices, such as a call between the Bluetooth headset and the mobile phone; The HSP protocol is used for call functions and provides the basic functions required for communication between the Bluetooth headset and the mobile phone; The AVRCP protocol is used to switch between call audio and music audio between Bluetooth devices; The MCU informs the mobile phone of the change of the audio stream through the AVRCP protocol, and requests the mobile phone to pause or resume music playing; The enabling and disabling of the A2DP protocol is controlled by an API or command of the Bluetooth stack; if the A2DP protocol is disabled, music will no longer be played on the Bluetooth headset.
5. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor according to claim 2, characterized in that , the Bluetooth headset is electrically connected to the charging base and the vehicle electrical system; The in-vehicle Bluetooth system is connected to the mobile phone via Bluetooth. When the vehicle is started, the in-vehicle Bluetooth system is turned on and a connection is established with the mobile phone via the Bluetooth protocol; When the vehicle is turned off, the vehicle-mounted Bluetooth system automatically shuts down and disconnects from the mobile phone.
6. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor as claimed in claim 2, characterized in that: When the input voltage of the Bluetooth headset is greater than the power supply low voltage detection threshold and the chip enable input terminal is connected to a high level, the charging base charges the Bluetooth headset; The voltage of the Bluetooth headset is lower than 3V, and the charging base uses a trickle current to pre-charge the Bluetooth headset; When the voltage of the Bluetooth headset exceeds 3V, the charging base uses a constant current mode to charge the Bluetooth headset; When the voltage of the Bluetooth headset is close to 4.2V, the charging base stops charging the Bluetooth headset.
7. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor as claimed in claim 4, characterized in that: The mobile phone is connected to the in-vehicle Bluetooth system via Bluetooth, the mobile phone transmits the music audio stream to the in-vehicle hands-free Bluetooth via the A2DP protocol, and the in-vehicle hands-free Bluetooth plays the music; The mobile phone remains connected to the Bluetooth headset, but the Bluetooth headset disables the A2DP protocol and thus does not play music; When the mobile phone receives an incoming call, the mobile phone sends an SCU command to the Bluetooth headset, and the mobile phone switches the call audio to the Bluetooth headset through the HFP protocol, and the user can answer the call by picking up the Bluetooth headset; The call can be ended by putting the Bluetooth headset back into the charging base, and the car-mounted hands-free Bluetooth continues to play music.
8. The vehicle-mounted Bluetooth headset communication system with integrated Hall sensor as claimed in claim 4, characterized in that: The control function of the Bluetooth headset is implemented by software firmware, which only processes data packets related to calls and filters data packets of other Bluetooth protocols; At the firmware level, it is necessary to ensure that the Bluetooth headset only processes data packets of the HFP / HSP protocol and does not process data packets of the A2DP protocol; The AVRCP protocol only implements necessary control commands, such as answering and hanging up a call.
9. The system according to claim 1, characterized in that The detection signal of the Hall sensor enables the headset to preferentially connect to the HFP of the mobile phone in a multi-device environment to ensure the real-time and stability of the call.