Vehicle-mounted power amplifier system

Abstract

The utility model relates to the technical field of electronic appliances, and discloses a vehicle-mounted power amplifier system, which comprises a micro-control unit, a signal transmission unit and a power amplification unit, and is characterized in that the micro-control unit is in communication connection with each of the signal transmission unit and the power amplification unit; the signal transmission unit is used for receiving the processed audio signal and sending a to-be-amplified signal corresponding to the processed audio signal to the power amplification unit, and the processed audio signal is obtained by processing the audio signal through a part, used for processing the audio signal, of a vehicle where the vehicle-mounted power amplification system is installed; the micro-control unit is used for receiving an association signal for generating a control signal, generating the control signal according to the association signal and outputting the control signal to the power amplification unit; and the power amplification unit is used for carrying out amplification processing on the processed audio signal according to the signal to be amplified and the control signal to obtain a signal after power amplification, and sending the signal after power amplification to target audio playing equipment.

Description

Technical Field

[0001] This utility model relates to the field of electronic and electrical technology, specifically to a vehicle power amplifier system. Background Technology

[0002] In related technologies, in-vehicle power amplifier systems include a digital signal processor (DSP) for processing audio signals. In-vehicle power amplifier systems are relatively expensive.

[0003] Therefore, how to reduce the cost of in-vehicle amplifier systems has become a problem that needs to be solved. Utility Model Content

[0004] In view of this, the present invention provides a vehicle-mounted power amplifier system.

[0005] In a first aspect, this utility model provides a vehicle-mounted power amplifier system, comprising: a microcontroller unit, a signal transmission unit, and a power amplification unit, wherein the microcontroller unit is communicatively connected to each of the signal transmission unit and the power amplification unit; the signal transmission unit is used to receive processed audio signals and to send a signal to be amplified corresponding to the processed audio signals to the power amplification unit, wherein the processed audio signals are obtained by processing audio signals by a component for audio signal processing installed in the vehicle of the vehicle-mounted power amplifier system; the microcontroller unit receives a correlation signal for generating a control signal, generates a control signal based on the correlation signal, and outputs a control signal to the power amplification unit; the power amplification unit is used to amplify the processed audio signals according to the signal to be amplified and the control signal to obtain a power-amplified signal, and to send the power-amplified signal to a target audio playback device.

[0006] In one possible implementation, a microcontroller unit is used to instruct the power amplification unit to send the power amplified signal to the target audio playback device after a delay, starting from the original transmission time corresponding to the power amplified signal.

[0007] In one possible implementation, a microcontroller unit is configured to receive a wake-up signal, wherein the wake-up signal is used to wake up the microcontroller unit.

[0008] In one possible implementation, the component used for audio signal processing is the first digital signal processing chip in the vehicle's infotainment system chip.

[0009] In one possible implementation, the associated signal used to generate the control signal is a signal indicating the target playback mode selected from multiple playback modes.

[0010] In one possible implementation, the signal transmission unit includes: an audio transmission chip and a second digital signal processing chip; the audio transmission chip is used to receive the processed audio signal and send the processed audio signal to the second digital signal processing chip; the second digital signal processing chip is used to perform noise reduction processing on the processed audio signal to obtain the signal to be amplified.

[0011] In one possible implementation, the power amplification unit includes multiple power amplifiers.

[0012] In one possible implementation, there are multiple power amplifiers, and the system further includes: a power supply module, a power boost module connected to the power supply module, the power supply module being connected to a first power amplifier, the power boost module being connected to a second power amplifier, and the power of the second power amplifier being greater than the power of the first power amplifier.

[0013] In one possible implementation, the power amplifier has multiple output channels, each of which is connected to a different audio playback device.

[0014] In one possible implementation, a microcontroller unit is used to receive status information from each audio playback device and determine the target audio playback device from among multiple audio playback devices based on the status information.

[0015] This invention provides a vehicle-mounted power amplifier system. An audio signal processing component is installed in the vehicle and pre-processes the audio signal before sending it to a signal transmission unit. The signal transmission unit receives the processed audio signal and sends the corresponding signal to be amplified to a power amplification unit. The microcontroller unit of the vehicle-mounted power amplifier system outputs control signals to the power amplification unit, enabling the power amplification unit to amplify the processed audio signal according to the signal to be amplified and the control signals, obtaining a power-amplified signal, and then sending the power-amplified signal to the target audio playback device to achieve the purpose of audio signal amplification. In other words, the vehicle-mounted power amplifier system does not require a dedicated DSP for audio signal processing, reducing the cost of the system. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1This is a structural diagram of an in-vehicle power amplifier system in related technologies;

[0018] Figure 2 This is a structural schematic diagram of a vehicle-mounted power amplifier system according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of another vehicle-mounted power amplifier system according to an embodiment of the present utility model;

[0020] Figure 4 This is a structural schematic diagram of another vehicle-mounted power amplifier system according to an embodiment of the present utility model;

[0021] Figure 5 This is a structural schematic diagram of another vehicle-mounted power amplifier system according to an embodiment of the present utility model; Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 1 , Figure 1 This is a structural diagram of an in-vehicle power amplifier system in related technologies.

[0024] Combination Figure 1 As shown, Figure 1 The CRRC system transmits the audio signal through the audio transmission chip A2B to the digital signal processor (DSP) for audio signal processing. The DSP then processes the audio signal to obtain the processed audio signal and sends it to the DSP for road noise cancellation to generate a noise-reduced audio signal. The noise-reduced signal is then sent to the power amplifier for signal amplification and finally sent to the loudspeaker.

[0025] However, in-vehicle amplifier systems in related technologies include digital signal processors for processing audio signals, and in-vehicle amplifier systems are relatively expensive.

[0026] Based on this, the vehicle amplifier system provided in this application embodiment does not require a DSP for audio signal processing, thus reducing the cost of the vehicle amplifier system.

[0027] Furthermore, the in-vehicle amplifier system provided in this application embodiment does not require the generation of processed audio signals from digital signals used for audio signal processing, and does not need to wait for the audio signal processing to be completed before generating the power-amplified audio signal. The in-vehicle amplifier system provided in this application embodiment directly receives the processed audio signal from the vehicle's head unit through the signal transmission unit, generates and sends the power-amplified audio signal to the audio playback device, thereby improving the speed of generating the power-amplified audio signal through the in-vehicle amplifier system, and thus enabling rapid playback of the power-amplified audio signal.

[0028] Please refer to Figure 2 , Figure 2 This is a structural schematic diagram of the vehicle-mounted power amplifier system according to this utility model.

[0029] Combination Figure 2 As shown in the embodiment of this utility model, an in-vehicle power amplifier system 1 is provided. The in-vehicle power amplifier system 1 is installed on a vehicle 100. The system includes: a microcontroller unit 11, a signal transmission unit 12, and a power amplification unit 13. The microcontroller unit 11 is communicatively connected to each of the signal transmission unit 12 and the power amplification unit 13. The signal transmission unit 12 is used to receive processed audio signals and send a signal to be amplified corresponding to the processed audio signals to the power amplification unit 13. The processed audio signals are obtained by processing audio signals by a component of the vehicle 100 for audio signal processing. The microcontroller unit 11 receives a correlation signal for generating a control signal, generates a control signal based on the correlation signal, and outputs a control signal to the power amplification unit 13. The power amplification unit 13 is used to amplify the processed audio signals according to the signal to be amplified and the control signal to obtain a power amplified signal, and send the power amplified signal to a target audio playback device.

[0030] The audio signal to be processed can be obtained by processing the audio signal by a component of the vehicle 100 for audio signal processing. Alternatively, the audio signal can be generated by a device in the vehicle 100 for generating audio signals.

[0031] As an example, a device used to generate an audio signal could be a radio tuner, which can receive electromagnetic waves from a radio station and demodulate the electromagnetic waves to generate an audio signal.

[0032] As an example, the device used to generate the audio signal could be a radio tuner or a CD / DVD player. The CD / DVD player reads the audio data from the disc and converts the digital signal into an analog audio signal using a laser head and signal processing circuitry.

[0033] The audio signal processing component of vehicle 100 can receive audio signals and process them to obtain processed audio signals.

[0034] The component for audio signal processing in vehicle 100 may be the first digital signal processing chip (Analog Devices Digital Signal Processor, ADSP) in the system on a chip (SOC) of vehicle infotainment system 2.

[0035] As an example, vehicle infotainment system 2 can be a DHU.

[0036] As an example, the process by which the audio signal processing component of vehicle 100 processes the audio signal may include at least one of operations such as anti-aliasing filtering, noise suppression, reverberation processing, and sound effect enhancement, without being specifically limited here.

[0037] The signal transmission unit 12 can serve as a bridge for the audio signal transmission of the vehicle-mounted power amplifier system 1. The signal transmission unit 12 can be responsible for receiving processed audio signals, sending processed audio signals, and processing processed audio signals (such as noise reduction processing).

[0038] As an example, the signal transmission unit 12 can be an audio transmission chip 121, such as (Automotive AudioBus, A2B), etc.

[0039] As an example, the signal transmission unit 12 may include an audio transmission chip 121 and a second digital signal processing chip 122 for noise reduction processing of the processed audio signal, such as a DSP for a Road Noise Cancellation Digital Signal Processor.

[0040] When the signal transmission unit 12 is an audio transmission chip 121, the signal to be amplified can be a processed audio signal. When the signal transmission unit 12 includes an audio transmission chip 121 and a second digital signal processing chip 122 for denoising the processed audio signal, the second digital signal processing chip 122 for denoising the processed audio signal can denoise the processed audio signal to generate the signal to be amplified.

[0041] The power amplification unit 13 amplifies the processed audio signal to obtain a power-amplified signal. The power amplification unit 13 acts as a bridge for signal transmission between the audio signal to be processed and the target audio playback device. Because the power of the processed audio signal is weak and insufficient to drive the target audio playback device to produce clear and loud sound, the power amplification unit 13 needs to amplify the processed audio signal to a sufficient power level to drive the target audio playback device to produce clear and loud sound. The target audio playback device can be one of multiple audio playback devices 3 that receives the power-amplified signal. The audio playback device 3 can be a speaker, etc.

[0042] The microcontroller unit 11 (MCU) can receive associated signals generated by the vehicle 100's controller in response to user input via voice, touch, or other means. These associated signals can be used to select sound effects, or for gain adjustment, etc., and are not specifically limited here.

[0043] The control signal can be generated by the microcontroller unit 11 based on the associated signal. That is, the microcontroller unit 11 can generate different control signals corresponding to different associated signals.

[0044] As an example, when the associated signal is the associated signal for selecting a sound effect, the control signal can be the signal that determines the sound effect mode of the signal to be amplified.

[0045] In one possible implementation, the microcontroller unit 11 can be communicatively connected to the controller of the vehicle 100 via a controller area network (CAN) bus.

[0046] In a specific implementation, the audio signal can be processed by the audio signal processing component installed in the vehicle 100 of the vehicle power amplifier system 1 to obtain the processed audio signal. The audio signal processing component sends the processed audio signal to the signal transmission unit 12. After receiving the processed audio signal, the signal transmission unit 12 can send the signal to be amplified corresponding to the processed audio signal to the power amplification unit 13. The power amplification unit 13 can wait to receive the control signal sent by the microcontroller unit 11. When the power amplification unit 13 receives the control signal sent by the microcontroller unit 11, it can amplify the processed audio signal according to the signal to be amplified and the control signal to obtain the power amplified signal, and send the power amplified signal to the target audio playback device so that the target audio playback device can complete the audio playback.

[0047] This invention provides a vehicle-mounted power amplifier system. An audio signal processing component is installed in the vehicle and pre-processes the audio signal before sending it to a signal transmission unit. The signal transmission unit receives the processed audio signal and sends the corresponding signal to be amplified to a power amplification unit. The microcontroller unit of the vehicle-mounted power amplifier system outputs control signals to the power amplification unit, enabling the power amplification unit to amplify the processed audio signal according to the signal to be amplified and the control signals, obtaining a power-amplified signal, and then sending the power-amplified signal to the target audio playback device to achieve the purpose of audio signal amplification. In other words, the vehicle-mounted power amplifier system does not require a dedicated DSP for audio signal processing, reducing the cost of the system.

[0048] Please refer to Figure 3 , Figure 3 This is a structural schematic diagram of another vehicle-mounted power amplifier system according to this utility model.

[0049] Combination Figure 3 As shown, in one possible implementation, the signal transmission unit 12 includes: an audio transmission chip 121 and a second digital signal processing chip 122; the audio transmission chip 121 is used to receive the processed audio signal and send the processed audio signal to the second digital signal processing chip 122; the second digital signal processing chip 122 is used to perform noise reduction processing on the processed audio signal to obtain the signal to be amplified.

[0050] The audio transmission chip 121 (Automotive Audio Bus, A2B) can be used to receive processed audio signals and send processed audio signals to the second digital signal processing chip 122.

[0051] The second digital signal processing chip 122 can be a DSP for road noise cancellation. The second digital signal processing chip 122 is used to perform noise reduction processing on the processed audio signal, wherein the noise reduction processing may include filtering, echo cancellation, noise suppression, etc.

[0052] In practice, the processed audio signal is first sent to the audio transmission chip 121, which then transmits the signal to the second digital signal processing chip 122. The second digital signal processing chip 122 performs noise reduction processing on the signal to obtain the signal to be amplified.

[0053] In one possible implementation, the audio transmission chip 121 can be communicatively connected to the microcontroller unit 11 via an Inter-Integrated Circuit (I2C) bus.

[0054] In one possible implementation, the audio transmission chip 121 can send the processed audio signal to the second digital signal processing chip 122 according to time-division multiplexing.

[0055] As an example, the audio transmission chip 121 can send the processed audio signal to the second digital signal processing chip 122 according to the TDM8.

[0056] As an example, the audio transmission chip 121 can send the processed audio signal to the second digital signal processing chip 122 according to the TDM 16.

[0057] In one possible implementation, the second digital signal processing chip 122 can be communicatively connected to the microcontroller unit 11 via a Serial Peripheral Interface (SPI). The microcontroller unit 11 can send commands to the second digital signal processing chip 122 via the SPI interface, causing the second digital signal processing chip 122 to perform noise reduction processing on the processed audio signal. The microcontroller unit 11 can also detect whether the second digital signal processing chip 122 has malfunctioned, etc., via the SPI interface.

[0058] The vehicle amplifier system provided in this embodiment uses a second digital signal processing chip to perform noise reduction processing on the audio signal, which can effectively remove noise from the processed audio signal. Furthermore, the signal transmission unit is designed separately as an audio transmission chip and a second digital signal processing chip. If either the audio transmission chip or the second digital signal processing chip fails, the faulty chip can be located and replaced accordingly, improving the reliability of the vehicle amplifier system.

[0059] In one possible implementation, the microcontroller unit 11 is configured to receive a wake-up signal, wherein the wake-up signal is used to wake up the microcontroller unit 11.

[0060] The wake-up signal is used to wake up the microcontroller unit 11.

[0061] As an example, the wake-up signal can be a dominant level trigger signal, etc.

[0062] In practice, the microcontroller unit 11 enters a sleep state after being inactive for a preset period of time. The microcontroller unit 11 can monitor signals on the controller local area network (CLAN) bus in real time. When the microcontroller unit 11 receives a wake-up signal from the CLAN bus, it wakes up. The preset time can be 10 seconds, 11 seconds, etc., and is not specifically limited here.

[0063] In the vehicle amplifier system provided in this application embodiment, the microcontroller enters a sleep state after being inactive for a preset period of time. Upon receiving a wake-up signal, the microcontroller is awakened, preventing the power consumption of the vehicle amplifier system from increasing due to prolonged operation of the microcontroller.

[0064] In one possible implementation, the microcontroller unit 11 is used to instruct the power amplification unit 13 to send the power amplified signal to the target audio playback device after a delay, starting from the original transmission time corresponding to the power amplified signal.

[0065] The original transmission time can be the time when the power amplification unit 13 amplifies the signal to be amplified and generates the amplified signal, or the time when the power amplification unit 13 sends the amplified signal to the audio playback device 3, etc., and is not specifically limited here.

[0066] The power amplifier unit 13 amplifies the signal to be amplified and generates a power-amplified signal. If the power-amplified signal is sent to the audio playback device 3 immediately after the signal is generated, a step change may occur at the moment of signal generation (such as jumping from 0V to 1V), which will cause the speaker to be directly driven through the coupling capacitor, thereby generating a pop sound.

[0067] Therefore, from the original transmission time, after a delay period, the power amplification unit 13 sends the amplified signal to the audio playback device 3, thereby preventing the generation of pop sounds. The delay period can be a preset delay duration.

[0068] The vehicle-mounted power amplifier system provided in this application embodiment sends amplified signals to the target audio playback device after a delay, thereby avoiding the generation of pop sounds.

[0069] In one possible implementation, the associated signal used to generate the control signal is a signal indicating the target playback mode selected from multiple playback modes.

[0070] Playback modes can include panoramic sound mode, karaoke mode, stereo sound mode, etc., without specific limitations. The target playback mode can be one of several playback modes.

[0071] The control signal can be used to control the audio playback mode of the audio playback device 3. Specifically, the microcontroller unit 11 can generate an associated signal in response to a user's target mode selection command, and then generate a control signal based on the associated signal. This control signal can indicate the selected audio playback mode of the audio playback device 3.

[0072] The vehicle amplifier system provided in this embodiment can select different target playback modes according to different user needs, and then play the audio of the target mode through the audio playback device, thereby improving the user experience.

[0073] In one possible implementation, the microcontroller unit 11 is used to receive status information of each audio playback device 3 and determine the target audio playback device from among the multiple audio playback devices 3 based on the status information.

[0074] Status information can indicate the status of audio playback device 3. This status information can include device operating temperature, online status, etc., without specific limitations here.

[0075] The target audio playback device can be any of the multiple audio playback devices 3 capable of playing audio. The microcontroller unit 11 can receive status information from each audio playback device 3 and then determine the target audio playback device from among the multiple audio playback devices 3 based on the status information. For example, it can detect the device's operating temperature; if the device's operating temperature exceeds a certain threshold, then the audio playback device 3 is determined not to be the target audio playback device. The operating temperature threshold can be a pre-set threshold.

[0076] The vehicle-mounted amplifier system provided in this embodiment allows the microcontroller unit to accurately determine the target audio playback device that can play audio normally through status information. After identifying the target audio playback device that can play audio normally, the system sends the amplified signal to the target audio playback device, thus avoiding the situation where the amplified signal cannot be received due to a malfunction of the audio playback device.

[0077] In one possible implementation, the power amplification unit 13 includes: a plurality of power amplifiers.

[0078] A power amplifier can be used to amplify a signal to be amplified, generating a power-amplified signal, which then drives a speaker to emit sound. In this embodiment, each power amplifier can receive the signal to be amplified sent by the signal transmission unit 12, and each power amplifier can receive a control signal sent by the microcontroller unit 11. Then, the power amplifier amplifies the signal to be amplified according to the control signal and the signal to be amplified, generating a power-amplified signal. The power-amplified signal can then be sent to the speaker.

[0079] The vehicle-mounted power amplifier system provided in this embodiment includes multiple power amplifiers in its power amplification unit. This allows the remaining power amplifiers to continue operating even if one power amplifier fails, thus avoiding the problem of the vehicle-mounted power amplifier system being unable to transmit amplified signals when using a single power amplifier if that amplifier is unusable.

[0080] Please refer to Figure 4 , Figure 4 This is a structural schematic diagram of another vehicle-mounted power amplifier system according to an embodiment of the present utility model.

[0081] Combination Figure 4 As shown, in one possible implementation, there are multiple power amplifiers. The vehicle power amplifier system 1 further includes: a power module 14, a power boost module 15 connected to the power module 14, the power module 14 and the first power amplifier 131 are connected, the power boost module 15 and the second power amplifier 132 are connected, and the power of the second power amplifier 132 is greater than the power of the first power amplifier 131.

[0082] The power supply module 14 is a module that supplies power to the vehicle amplifier system 1. The power boost module 15 is a module that boosts the voltage supplied by the power supply module 14. The power boost module 15 is connected to the power supply module 14, and the power supply module 14 can supply power to the power boost module 15.

[0083] The power supply module 14 is connected to the first power amplifier 131. The number of first power amplifiers 131 can be two or three, etc., without specific limitation. The power boost module 15 can be connected to the second power amplifier 132. The number of second power amplifiers 132 can be two or three, etc., without specific limitation. The power of the second power amplifier 132 is greater than the power of the first power amplifier 131.

[0084] As an example, power module 14 can provide 13.5V, and power boost module 15 can boost the 13.5V to 20V. Accordingly, the first power amplifier 131 can have a power of 22W, and the second power amplifier 132 can have a power of 50W.

[0085] Please refer to Figure 5 , Figure 5 This is a structural schematic diagram of another vehicle-mounted power amplifier system according to an embodiment of the present utility model.

[0086] Combination Figure 5As shown, in one possible implementation, the power amplifier has multiple output channels, each of which is connected to a different audio playback device. These different audio playback devices may include a first audio playback device 31, a second audio playback device 32, a third audio playback device 33, a fourth audio playback device 34, etc.

[0087] The power amplifier has multiple output channels. Each power amplifier may include four output channels, and the output signal power of each channel can be the same. Each of the multiple output channels can be connected to a different audio playback device.

[0088] As an example, the power amplifier may include multiple output channels, specifically output channel A1, output channel A2, output channel A3, and output channel A4. The audio playback device 3 includes speakers B1, B2, B3, and B4, wherein output channel A1 is connected to speaker B1, output channel A2 is connected to speaker B2, output channel A3 is connected to speaker B3, and output channel A4 is connected to speaker B4.

[0089] In one possible implementation, one output channel can connect to multiple audio playback devices. For example, output channel A1 can connect to speaker B1 and speaker B2, etc.

[0090] The vehicle-mounted power amplifier system provided in this embodiment can drive different audio playback devices simultaneously through multiple output channels of the power amplifier, thereby controlling multiple audio playback devices to work at the same time and improving the playback efficiency of the amplified signal.

[0091] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vehicle-mounted power amplifier system, characterized in that, The system includes: a microcontroller unit, a signal transmission unit, and a power amplification unit, wherein the microcontroller unit is communicatively connected to each of the signal transmission unit and the power amplification unit; The signal transmission unit is used to receive the processed audio signal and send the signal to be amplified corresponding to the processed audio signal to the power amplification unit. The processed audio signal is obtained by the audio signal processing component installed in the vehicle by the vehicle power amplifier system. The microcontroller receives an associated signal for generating a control signal, generates a control signal based on the associated signal, and outputs the control signal to the power amplifier unit. The power amplification unit is used to amplify the processed audio signal according to the signal to be amplified and the control signal to obtain a power-amplified signal, and to send the power-amplified signal to the target audio playback device.

2. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The microcontroller unit is used to instruct the power amplification unit to send the power amplified signal to the target audio playback device after a delay, starting from the original transmission time corresponding to the power amplified signal.

3. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The microcontroller unit is configured to receive a wake-up signal, wherein the wake-up signal is used to wake up the microcontroller unit.

4. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The component used for audio signal processing is the first digital signal processing chip in the vehicle's infotainment system chip.

5. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The associated signal used to generate the control signal is a signal that indicates the target playback mode selected from multiple playback modes.

6. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The signal transmission unit includes: an audio transmission chip and a second digital signal processing chip; An audio transmission chip is used to receive the processed audio signal and to send the processed audio signal to the second digital signal processing chip. The second digital signal processing chip is used to perform noise reduction processing on the processed audio signal to obtain the signal to be amplified.

7. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The power amplification unit includes multiple power amplifiers.

8. The vehicle-mounted power amplifier system according to claim 7, characterized in that, The system includes multiple power amplifiers, and further includes a power supply module and a power boost module connected to the power supply module. The power supply module is connected to a first power amplifier, and the power boost module is connected to a second power amplifier. The power of the second power amplifier is greater than that of the first power amplifier.

9. The vehicle-mounted power amplifier system according to claim 7, characterized in that, The power amplifier has multiple output channels, each of which is connected to a different audio playback device.

10. The vehicle-mounted power amplifier system according to claim 1, characterized in that, The microcontroller unit is used to receive status information from each audio playback device and determine the target audio playback device from multiple audio playback devices based on the status information.

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