A smart digital instrument circuit for motorcycles with Bluetooth functionality

Abstract

This utility model relates to the field of motorcycle instrument technology and discloses a smart digital instrument circuit for motorcycles with Bluetooth functionality. It includes a Bluetooth module and a display module. The Bluetooth module comprises a Bluetooth chip, a power supply unit, a clock unit, a Bluetooth RF link, an audio input unit, an audio output unit, and a button input circuit. The display module displays data from a mobile device. The power supply unit provides stable voltage to different pins of the Bluetooth chip. The clock unit provides a unified clock reference, allowing the circuits within the Bluetooth module to work synchronously and coordinately. The Bluetooth RF link is used for wireless data transmission and reception. The audio input unit receives audio data, the audio output unit outputs audio data, and the button input circuit controls switching operations. The Bluetooth chip integrates HFP and HSP protocols and is used to receive, process, and transmit information. This utility model enables telephone answering / hanging up and audio playback.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle instrument technology, specifically to a smart digital instrument circuit for motorcycles with Bluetooth functionality. Background Technology

[0002] Motorcycle intelligent digital instrument panels, as a new type of instrument integrating digital display and intelligent interactive functions, can digitally present information such as vehicle speed, RPM, fuel level, mileage, water temperature, and voltage, while also featuring intelligent touchscreen interaction. To meet the driver's need for convenient phone calls and audio playback while driving, there is an urgent need for a motorcycle intelligent digital instrument panel circuit with Bluetooth functionality that can answer / hang up calls and play audio. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a motorcycle intelligent digital instrument circuit with Bluetooth function, which has Bluetooth function and can realize telephone answering / hanging up and audio playback.

[0004] The technical solution adopted in this utility model is as follows: A smart digital instrument circuit for motorcycles with Bluetooth function, including a Bluetooth module and a display module. The Bluetooth module includes a Bluetooth chip, a power supply unit, a clock unit, a Bluetooth RF link, an audio input unit, an audio output unit, and a key input circuit. The Bluetooth chip is connected to the power supply unit, the clock unit, the Bluetooth RF link, the audio input unit, and the audio output unit respectively. The Bluetooth chip is connected to the display module, which is used to display data sent by the mobile device. The power supply unit is used to provide stable voltage to different pins of the Bluetooth chip. The clock unit provides a unified clock reference to enable the circuits in the Bluetooth module to work synchronously and in coordination. The Bluetooth RF link is used for wireless data transmission and reception. The audio input unit is used to receive audio data. The audio output unit is used to output audio data. The key input circuit is used to control switching operations. The Bluetooth chip has built-in HFP and HSP protocols and is used to receive, process, and transmit information.

[0005] The principle of the technical solution: The Bluetooth module establishes a wireless connection with the mobile device and receives audio data (such as music or navigation voice) sent by the mobile device through the Bluetooth radio frequency link. The Bluetooth chip decodes and processes the audio data and plays the sound through the audio output unit. The Bluetooth chip communicates with the mobile device via the HFP protocol. When the mobile device receives an incoming call, the mobile device's phone number is sent to the Bluetooth chip via the Bluetooth radio frequency link. The Bluetooth chip then transmits the number data to the display module for visual display. The user selects to answer or hang up a call via a button input circuit. If the user selects to answer a call, the sound is converted into a digital signal by the audio input unit. The Bluetooth chip encodes the signal and sends it to the mobile device via the Bluetooth RF link. The mobile device then sends the other party's voice data back to the Bluetooth chip via the Bluetooth RF link. The Bluetooth chip decodes and processes the data and plays it through the audio output unit. When the call is disconnected, the Bluetooth chip sends a disconnect command to the mobile device via the HFP protocol to terminate the call.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the configuration of a Bluetooth chip, power supply unit, clock unit, Bluetooth RF link, audio input unit, audio output unit, and key input circuit, as well as a display module, and the Bluetooth chip's built-in HFP and HSP protocols, enables telephone answering / hanging up and audio playback.

[0007] In a preferred embodiment of this utility model, the power supply unit includes a first capacitor, a second capacitor, and a first resistor. One end of the first capacitor is grounded, and the other end is connected in parallel with the power supply circuit and then connected to the VBAT pin of the Bluetooth chip. One end of the second capacitor is grounded, and the other end is connected to the LDOIN / PB5 pin of the Bluetooth chip. One end of the first resistor is connected to the PB1 pin of the Bluetooth chip, and the other end provides a stable voltage to different pins of the Bluetooth chip.

[0008] Beneficial effects: The first and second capacitors can filter out high-frequency noise in the power supply, eliminate or reduce mutual interference between different modules in the circuit, and ensure that the Bluetooth chip can work in a stable power supply environment. The power supply circuit can provide stable voltage to different pins of the Bluetooth chip through the first capacitor, the second capacitor and the first resistor.

[0009] In a preferred embodiment of this utility model, the clock unit includes a crystal oscillator, a third capacitor, and a fourth capacitor. The crystal oscillator is connected in parallel with the BT_OSCO pin of the Bluetooth chip and then connected to one end of the third capacitor. The crystal oscillator is connected in parallel with the BT_OSCI pin of the Bluetooth chip and then connected to one end of the fourth capacitor. The other end of the third capacitor and the other end of the fourth capacitor are connected in parallel with the crystal oscillator and then grounded. One end of the crystal oscillator is grounded.

[0010] Beneficial effects: The clock signal generated by the crystal oscillator is input to the Bluetooth chip through the BT_OSCO pin and the BT_OSCI pin of the Bluetooth chip, providing a unified clock reference for the various functional modules inside the Bluetooth module, so that the circuits in the Bluetooth module can work synchronously and in a coordinated manner.

[0011] In a preferred embodiment of this utility model, the Bluetooth radio frequency link includes a fifth capacitor, a sixth capacitor, a first inductor, and an ANT1 antenna. One end of the first inductor is grounded, and the other end is connected in parallel with the BT_RF pin of the Bluetooth chip and then connected to one end of the fifth capacitor. The other end of the fifth capacitor is connected in parallel with one end of the sixth capacitor and then connected to the ANT1 antenna. The other end of the ANT1 antenna is grounded, and the other end of the sixth capacitor is grounded.

[0012] Beneficial effects: The Bluetooth chip realizes wireless audio transmission and reception through the Bluetooth radio frequency link. The fifth capacitor, the sixth capacitor, and the first inductor work together to play the role of impedance matching and filtering. Impedance matching can ensure that the energy loss of radio frequency signals is minimized during transmission, thereby improving the transmission and reception efficiency of signals. Filtering removes noise and interference from radio frequency signals, ensuring the stability and reliability of Bluetooth wireless communication.

[0013] In a preferred embodiment of the present invention, the audio input unit includes a microphone, a second resistor, and a third resistor. The microphone is connected to the PC7 pin and the MIC pin of the Bluetooth chip, respectively. The PC7 pin of the Bluetooth chip provides a DC bias voltage to the microphone. The microphone is connected in parallel with one end of the second resistor and then connected to one end of the third resistor. The other end of the second resistor is grounded, and the other end of the third resistor is connected to the PAO pin of the Bluetooth chip.

[0014] In this embodiment, the microphone collects the user's voice, converts it into a digital signal through the audio input unit, the Bluetooth chip encodes the signal, and sends it to the mobile device through the Bluetooth RF link. The mobile device returns the other party's voice data to the Bluetooth chip through the Bluetooth RF link, and the Bluetooth chip decodes it and plays it through the audio output unit.

[0015] Beneficial effect: The Bluetooth chip's PC7 pin provides a suitable DC bias voltage for the microphone, enabling the microphone to operate normally.

[0016] In a preferred embodiment of this utility model, the key input circuit includes a key and a fourth resistor. One end of the key is connected to one end of the fourth resistor, the other end of the key is grounded, and the other end of the fourth resistor is connected to the PA1 pin of the Bluetooth chip.

[0017] Beneficial effects: The button, resistor, and Bluetooth chip are connected to control whether to answer or hang up incoming calls.

[0018] In a preferred embodiment of this utility model, the audio output unit includes a speaker, a seventh capacitor, and an eighth capacitor. The speaker is connected to the DACL pin and the DAR pin of the Bluetooth chip, respectively. The VDDIO pin of the Bluetooth chip is connected to one end of the seventh capacitor, and the other end of the seventh capacitor is grounded. One end of the eighth capacitor is connected to the VCOMO pin of the Bluetooth chip, and the other end of the eighth capacitor is connected in parallel with the DACVSS pin of the Bluetooth chip and then connected to analog ground.

[0019] Beneficial effects: The Bluetooth chip's DACL and DAR pins output left and right channel audio signals, which are then played through the speaker. The seventh and eighth capacitors are used for filtering to improve the audio signal quality.

[0020] In a preferred embodiment of this utility model, an indicator circuit is also included. The indicator circuit includes a fifth resistor and an indicator light. The PB11 pin of the Bluetooth chip is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the indicator light, and the other end of the indicator light is grounded.

[0021] Beneficial effect: The indicator circuit can display the working status of the Bluetooth module. Attached Figure Description

[0022] Figure 1 This is a circuit diagram of the Bluetooth module of the intelligent digital instrument circuit for motorcycles with Bluetooth function. Detailed Implementation

[0023] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] A motorcycle intelligent digital instrument circuit with Bluetooth functionality, including a Bluetooth module and a display module, such as... Figure 1 As shown, the Bluetooth module includes a Bluetooth chip, a power supply unit, a clock unit, a Bluetooth RF link, an audio input unit, an audio output unit, and a button input circuit. The Bluetooth chip is connected to the power supply unit, the clock unit, the Bluetooth RF link, the audio input unit, and the audio output unit, respectively, and is also connected to the display module.

[0026] In this embodiment, the Bluetooth chip model is AC6955F.

[0027] The display module is used to display data sent by the mobile device. The power supply unit is used to provide stable voltage to different pins of the Bluetooth chip. The clock unit provides a unified clock reference to enable the circuits in the Bluetooth module to work synchronously and in coordination. The Bluetooth RF link is used for wireless data transmission and reception. The audio input unit is used to receive audio data. The audio output unit is used to output audio data. The button input circuit is used to control switching operations. The Bluetooth chip has built-in HFP and HSP protocols and is used to receive, process, and transmit information.

[0028] In this embodiment, the Bluetooth module establishes a wireless connection with the mobile device, receives audio data (such as music or navigation voice) sent by the mobile device through the Bluetooth radio frequency link, the Bluetooth chip decodes and processes the audio data, and plays the sound through the audio output unit; The Bluetooth chip communicates with the mobile device via the HFP protocol. When the mobile device receives an incoming call, the mobile device's phone number is sent to the Bluetooth chip via the Bluetooth radio frequency link. The Bluetooth chip then transmits the number data to the display module for visual display. The user selects to answer or hang up a call via a button input circuit. If the user selects to answer a call, the sound is converted into a digital signal by the audio input unit. The Bluetooth chip encodes the signal and sends it to the mobile device via the Bluetooth RF link. The mobile device then sends the other party's voice data back to the Bluetooth chip via the Bluetooth RF link. The Bluetooth chip decodes and processes the data and plays it through the audio output unit. When the call is disconnected, the Bluetooth chip sends a disconnect command to the mobile device via the HFP protocol to terminate the call.

[0029] In this embodiment, the +5V power supplied by the external power source is converted into 5V_BT power through D18 (1N5819 Schottky diode). The 1N5819 diode serves to prevent reverse connection of the power supply and protect the circuit.

[0030] The power supply unit includes a first capacitor C69, a second capacitor C123, and a first resistor R138. One end of the first capacitor C69 is grounded, and the other end is connected in parallel with the power supply circuit and then connected to the VBAT pin of the Bluetooth chip. One end of the second capacitor C123 is grounded, and the other end is connected to the LDOIN / PB5 pin of the Bluetooth chip. One end of the first resistor R138 is connected to the PB1 pin of the Bluetooth chip, and the other end provides a stable voltage to different pins of the Bluetooth chip.

[0031] In this embodiment, the first capacitor C69 is model C0402-25V-1uF-10%, the second capacitor C123 is model C0402-50V-2.2F-10%, and the first resistor R138 is model RC04q2-22R-F-1 / 16W.

[0032] The clock unit includes a crystal oscillator, a third capacitor C104, and a fourth capacitor C105. The crystal oscillator is connected in parallel with the BT_OSCO pin of the Bluetooth chip and then connected to one end of the third capacitor C104. The crystal oscillator is connected in parallel with the BT_OSCI pin of the Bluetooth chip and then connected to one end of the fourth capacitor C105. The other ends of the third capacitor C104 and the other ends of the fourth capacitor C105 are connected in parallel with the crystal oscillator and then grounded. One end of the crystal oscillator is grounded.

[0033] In this embodiment, the crystal oscillator is model OSC3, 4AA24000000 with a frequency of 24MHz, the third capacitor C104 is model b402-50V-18pF-10%, and the fourth capacitor C105 is model C0402-50V-18pF-10%.

[0034] The Bluetooth RF link includes a fifth capacitor C61, a sixth capacitor C66, a first inductor L5, and an ANT1 antenna. One end of the first inductor L5 is grounded, and the other end is connected in parallel with the BT_RF pin of the Bluetooth chip and then connected to one end of the fifth capacitor C61. The other end of the fifth capacitor C61 is connected in parallel with one end of the sixth capacitor C66 and then connected to the ANT1 antenna. The other end of the ANT1 antenna is grounded, and the other end of the sixth capacitor C66 is grounded.

[0035] In this embodiment, the fifth capacitor C61 is model C0402-50V-2.7pF-10%, the sixth capacitor C66 is model C0402-50V-18pF-10%, and the first inductor L5 is model L0603-NC.

[0036] The audio input unit includes a microphone, a second resistor R80, and a third resistor R78. The microphone is connected to the PC7 pin and the MIC pin of the Bluetooth chip, respectively. The PC7 pin of the Bluetooth chip provides a DC bias voltage to the microphone. The microphone is connected in parallel with one end of the second resistor R80 and then connected to one end of the third resistor R78. The other end of the second resistor R80 is grounded, and the other end of the third resistor R78 is connected to the PAO pin of the Bluetooth chip.

[0037] In this embodiment, the second resistor R80 is model RC0603-4.7KF-1 / 10W, and the third resistor R78 is model RC0603-1K-F-1 / 10W.

[0038] The button input circuit includes a button and a fourth resistor R77. One end of the button is connected to one end of the fourth resistor R77, and the other end of the button is grounded. The other end of the fourth resistor R77 is connected to the PA1 pin of the Bluetooth chip.

[0039] In this embodiment, the fourth resistor R77 is model RC0603-1K-F-1 / 10W.

[0040] The audio output unit includes a speaker, a seventh capacitor C68, and an eighth capacitor C67. The speaker is connected to the DACL pin and the DAR pin of the Bluetooth chip, respectively. The VDDIO pin of the Bluetooth chip is connected to one end of the seventh capacitor C68, and the other end of the seventh capacitor C68 is grounded. One end of the eighth capacitor C67 is connected to the VCOMO pin of the Bluetooth chip, and the other end of the eighth capacitor C67 is connected in parallel with the DACVSS pin of the Bluetooth chip and then connected to analog ground.

[0041] In this embodiment, the seventh capacitor C68 is model C0402-25V-1uF-10%, and the eighth capacitor C67 is model C0402-25V-1uF-10%.

[0042] It also includes an indicator circuit, which includes a fifth resistor R140 and an indicator light LD320. The Bluetooth chip PB11 pin is connected to one end of the fifth resistor R140, the other end of the fifth resistor R140 is connected to one end of the indicator light LD320, and the other end of the indicator light LD320 is grounded.

[0043] In this embodiment, the fifth resistor R140 is model RC0402-1K-F-1 / 16W.

[0044] The Bluetooth chip also includes a USBDP pin and a USBDM pin. The Bluetooth module is connected to the D+ and D- pins of the USB interface through the Bluetooth chip's USBDP pin and USBDM pin. When the Bluetooth chip is connected to the host (a terminal with computing capabilities) via USB, the Bluetooth chip can perform bidirectional data transmission with the host through the USBDP pin and USBDM pin. The Bluetooth chip can receive control commands from the host or send audio data to the host.

[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A smart digital instrument circuit for motorcycles with Bluetooth functionality, characterized in that: The system includes a Bluetooth module and a display module. The Bluetooth module comprises a Bluetooth chip, a power supply unit, a clock unit, a Bluetooth RF link, an audio input unit, an audio output unit, and a key input circuit. The Bluetooth chip is connected to the power supply unit, clock unit, Bluetooth RF link, audio input unit, and audio output unit. The Bluetooth chip is also connected to the display module, which displays data sent by the mobile device. The power supply unit provides stable voltage to different pins of the Bluetooth chip. The clock unit provides a unified clock reference, allowing the circuits in the Bluetooth module to work synchronously and in coordination. The Bluetooth RF link is used for wireless data transmission and reception. The audio input unit receives audio data, the audio output unit outputs audio data, and the key input circuit controls switching operations. The Bluetooth chip incorporates HFP and HSP protocols and is used to receive, process, and transmit information.

2. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The power supply unit includes a first capacitor, a second capacitor, and a first resistor. One end of the first capacitor is grounded, and the other end is connected in parallel with the power supply circuit and then connected to the VBAT pin of the Bluetooth chip. One end of the second capacitor is grounded, and the other end is connected to the LDOIN / PB5 pin of the Bluetooth chip. One end of the first resistor is connected to the PB1 pin of the Bluetooth chip, and the other end provides a stable voltage to different pins of the Bluetooth chip.

3. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The clock unit includes a crystal oscillator, a third capacitor, and a fourth capacitor. The crystal oscillator is connected in parallel with the BT_OSCO pin of the Bluetooth chip and then connected to one end of the third capacitor. The crystal oscillator is connected in parallel with the BT_OSCI pin of the Bluetooth chip and then connected to one end of the fourth capacitor. The other ends of the third capacitor and the other ends of the fourth capacitor are connected in parallel with the crystal oscillator and then grounded. One end of the crystal oscillator is grounded.

4. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The Bluetooth RF link includes a fifth capacitor, a sixth capacitor, a first inductor, and an ANT1 antenna. One end of the first inductor is grounded, and the other end is connected in parallel with the BT_RF pin of the Bluetooth chip and then connected to one end of the fifth capacitor. The other end of the fifth capacitor is connected in parallel with one end of the sixth capacitor and then connected to the ANT1 antenna. The other end of the ANT1 antenna is grounded, and the other end of the sixth capacitor is grounded.

5. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The audio input unit includes a microphone, a second resistor, and a third resistor. The microphone is connected to the PC7 pin and the MIC pin of the Bluetooth chip, respectively. The PC7 pin of the Bluetooth chip provides a DC bias voltage to the microphone. The microphone is connected in parallel with one end of the second resistor and then connected to one end of the third resistor. The other end of the second resistor is grounded, and the other end of the third resistor is connected to the PAO pin of the Bluetooth chip.

6. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The button input circuit includes a button and a fourth resistor. One end of the button is connected to one end of the fourth resistor, and the other end of the button is grounded. The other end of the fourth resistor is connected to the PA1 pin of the Bluetooth chip.

7. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: The audio output unit includes a speaker, a seventh capacitor, and an eighth capacitor. The speaker is connected to the DACL pin and the DAR pin of the Bluetooth chip, respectively. The VDDIO pin of the Bluetooth chip is connected to one end of the seventh capacitor, and the other end of the seventh capacitor is grounded. One end of the eighth capacitor is connected to the VCOMO pin of the Bluetooth chip, and the other end of the eighth capacitor is connected in parallel to the DACVSS pin of the Bluetooth chip and then connected to analog ground.

8. The motorcycle intelligent digital instrument circuit with Bluetooth function according to claim 1, characterized in that: It also includes an indicator circuit, which includes a fifth resistor and an indicator light. The PB11 pin of the Bluetooth chip is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to one end of the indicator light, and the other end of the indicator light is grounded.

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