Vehicle-mounted audio system with emergency call function

Abstract

The utility model provides a vehicle-mounted audio system with an emergency call function, which comprises a host, a power amplifier module connected with the host, and a TBOX module connected with the power amplifier module, the TBOX module comprises a second A2B processing module connected with the power amplifier module through an A2B bus and an SOC module connected with the second A2B processing module, and the SOC module is connected with the second loudspeaker module and the microphone module. On one hand, the second loudspeaker module is multiplexed as the integration of the loudspeaker of the whole vehicle and participates in the processing of the sound field in the whole vehicle; and on the other hand, the TBOX module performs emergency call by means of the second loudspeaker module and the microphone of the TBOX module in case of emergency without being influenced by other nodes of the vehicle-mounted audio system, so that normal operation of the emergency call function of the TBOX module in any case is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile audio, especially to a vehicle-mounted audio system with emergency call function. BACKGROUND

[0002] The rapid development of automobile electronic technology provides a technical basis for the development of vehicle-mounted audio systems. For example, the performance of microprocessors, digital signal processors (DSPs), and memories is constantly improving, and the cost is constantly decreasing, enabling vehicle-mounted audio systems to implement more complex functions. The number of cars on the market is increasing year by year, and the probability of car accidents is also rising. In order to be able to quickly deliver information such as the location of the accident site to the emergency center in the event of an accident or other accidents, and provide timely emergency services, cars with network connection capabilities use T-BOX (Telematics Box, vehicle-mounted intelligent terminal) to provide ECALL (Emergency Call, emergency call) services.

[0003] For example, Chinese invention patent (CN202210865465.8) discloses a TBOX control method, system and vehicle with integrated ECALL function, wherein the control method includes: when the airbag controller receives the collision signal sent by the collision sensor, the airbag controller generates an alarm instruction according to the collision signal; the alarm instruction is sent to the TBOX, so that the TBOX dials the rescue center phone according to the alarm instruction through the stored ECALL number, collects vehicle condition data, and synchronously sends the vehicle condition data to the rescue platform; the TBOX sends a shutdown instruction to the infotainment controller, which closes the in-vehicle microphone and in-vehicle speaker, and simultaneously opens the TBOX microphone and TBOX speaker, wherein the TBOX dedicated microphone and speaker are used for voice communication between the passenger and the rescue center; the application automatically dials the rescue center phone through the integrated ECALL function of the TBOX when the vehicle collides, so that the injured person in the vehicle can receive more timely treatment, and the safety of driving is improved.

[0004] The above-mentioned vehicle audio link system includes a host IVI, a voice recognition Mic, an audio output speaker, an ECALL speaker, a cooperating Mic for ECALL, and an ANC noise reduction Mic. Among them, the Mic and the speaker for ECALL are dedicated to ECALL service, and are completely independent of the original vehicle-mounted entertainment audio link, increasing the overall cost. At the same time, once the harness and part of the ECU in the entire audio link are abnormal, the entire call link may be interrupted, or the emergency call may be interrupted while playing music, resulting in abnormal call. UTILITY MODEL CONTENTS

[0005] Based on the defects existing in the prior art, the utility model provides a vehicle -mounted audio system with emergency communication function, including host computer, with the power amplifier module of host computer connection, with the TBOX module of power amplifier module connection, power amplifier module is connected with first loudspeaker module, TBOX module is connected with second loudspeaker module and microphone module, TBOX module includes the second A2B processing module of power amplifier module through A2B bus connection, with the SOC module of second A2B processing module connection, SOC module is connected with second loudspeaker module and microphone module.

[0006] Preferably, the power amplifier module comprises a first A2B processing module connected to the host computer through an A2B bus.

[0007] Preferably, the power amplifier module comprises a first DSP connected to the first A2B processing module, and a first class-D power amplifier connected to the first DSP, wherein the first class-D power amplifier is connected to the first loudspeaker module through a hardwire.

[0008] Preferably, the power amplifier module comprises a first MCU connected to the first DSP through an SPI interface.

[0009] Preferably, the SOC module comprises a second DSP connected to a second class-D power amplifier, and the second class-D power amplifier is connected to the second loudspeaker module.

[0010] Preferably, the TBOX module comprises an ADC (Analog-to-Digital Converter), the microphone module is connected to the ADC, and the ADC is connected to the SOC module through an I2S bus.

[0011] Preferably, the TBOX module comprises a network communication module, and the network communication module is connected to the SOC module through a UART interface.

[0012] Preferably, the TBOX module comprises a second MCU, the second MCU is connected to the second A2B processing module through an I2C interface, and the second MCU is connected to the SOC module through a UART interface.

[0013] Preferably, the TBOX module comprises a power management module for managing power supply of the TBOX module.

[0014] Preferably, the first loudspeaker module comprises a plurality of loudspeakers arranged at a co-driver seat and a rear seat of the vehicle, and the second loudspeaker module comprises a loudspeaker arranged at a main driver seat of the vehicle.

[0015] Beneficial effects:

[0016] The technical scheme of the utility model discloses all audio links rely on A2B bus, take TBOX module as the slave node of A2B link, on the one hand, the second loudspeaker module and microphone module in TBOX module can be used as the component part of the vehicle-mounted cabin entertainment system, under normal circumstances, belong to power amplifier module, can play music, navigation and other audio information, instead of only being used as the independent module for calling in emergency, reduce overall cost, on the other hand, under emergency, TBOX module initiatively disconnects the A2B link of audio link, relies on the second loudspeaker module and microphone of itself and carries out emergency call, even if all other wiring harnesses, ECU, power supply are disconnected, can guarantee that emergency rescue service keeps normal work. BRIEF DESCRIPTION OF DRAWINGS

[0017] The following drawings only illustrate and explain the utility model, and do not limit the scope of the utility model.

[0018] Figure 1 It is the whole schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to have clearer understanding of the technical features, purposes and effects of the present application, the specific implementation manners of the utility model will be explained by referring to the drawings, and the same signs in each drawing represent the same parts.

[0020] In the utility model, "connection" can include direct connection, indirect connection, communication connection and electric connection, except for special instructions.

[0021] The terms used in the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, numbers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated terms.

[0022] The utility model provides a kind of vehicle-mounted audio system with emergency call function, such as Figure 1As shown, the system includes a host, a power amplifier module, and a TBOX module, adopts a distributed architecture, the host serves as an information entertainment center, the power amplifier module is responsible for audio amplification and output, and the TBOX module is responsible for remote communication and emergency calls. The power amplifier module includes a first A2B processing module connected with the host through an A2B bus, a first DSP connected with the first A2B processing module through an I2S bus, a first class D power amplifier connected with the first DSP through an I2S bus, a first speaker module connected with the first class D power amplifier through a hard wire, and a first MCU connected with the first DSP through an SPI interface. The first speaker module includes a plurality of speakers arranged at the co-driver seat and the rear seat of the vehicle.

[0023] A2B (Automotive Audio Bus) is a vehicle audio bus, and the A2B bus is used to connect audio devices in the vehicle. The DSP (Digital Signal Processor) audio processing module is a kind of audio processor specially used for processing digital signals, which can accept external sound signals, output audio signals after internal processing, and drive loudspeakers or earphones. The I2S (Inter-IC Sound) bus is a serial bus interface standard for transmitting digital audio data between integrated circuits. It is mainly used to connect audio CODEC (Coder / Decoder), digital signal processor (DSP), digital audio interface receiver (DIR) and other audio processing devices. MCU (Microcontroller Unit), also known as single chip microcomputer (Single Chip Microcomputer) or single chip microcomputer, is a kind of computer which integrates CPU (Central Process Unit) frequency and specifications, memory, timer, USB, A / D conversion, UART, PLC, DMA and other peripheral interfaces into a single chip.

[0024] In the normal mode, the host sends audio signals such as music and navigation voice to the first A2B processing module of the power amplifier module through the A2B bus, the audio signals are multi-channel audio (for example, channels 1-4 are full-car music, and channels 5-6 are driving position audio), the first A2B processing module sends the audio signals of channels 1-4 to the first DSP, the first MCU configures parameters of the first DSP, including setting of an EQ curve and filter coefficients, the first DSP performs equalization, dynamic compression, active noise reduction and other processing on the audio signals and then sends the processed audio signals to the first class-D power amplifier, in the embodiment, the first class-D power amplifier adopts a TAS6424-Q1 audio amplifier supporting a digital audio interface, which is a high-performance four-channel class-D audio amplifier specially designed for automotive applications. The first class-D power amplifier converts the received low-power digital audio signals into PWM or PDM signals, then performs power amplification through an output stage, and then filters high-frequency switching noise through a built-in low-pass filter, only retains the audio signals, and finally outputs analog audio signals to the first speaker module to drive the first speaker module to work.

[0025] The TBOX module includes a second A2B processing module connected with the power amplifier module through the A2B bus, a second MCU connected with the second A2B processing module through an I2C interface, and a SOC module connected with the second A2B processing module through an I2S bus, the second MCU is connected with the SOC module through a UART interface, the SOC module is connected with an ADC analog-to-digital converter through the I2S bus, and the ADC analog-to-digital converter is connected with a microphone module.

[0026] The SOC module includes a second DSP connected with a second class-D power amplifier through the I2S bus, and the second class-D power amplifier is connected with a second speaker module through a hard wire. The second speaker module includes a speaker arranged at a main driving position of the vehicle. Similarly, the second class-D power amplifier adopts a TAS6424-Q1 audio amplifier supporting a digital audio interface.

[0027] The TBOX module further includes a power management module for managing power supply of the TBOX module, the power management module is connected with the second MCU, the second A2B processing module, the SOC module, the second class-D power amplifier, and the ADC analog-to-digital converter, and is connected with a vehicle constant power supply, thereby providing power supply with different voltages for the modules in the TBOX module. The TBOX module further includes a network communication module connected with the SOC module through a UART interface.

[0028] In the normal mode, the host transmits an audio signal to the power amplifier module through the A2B bus, the power amplifier module plays the audio signal through the first loudspeaker module, and simultaneously, the power amplifier module transmits the audio signal (for example, channel 5-6 signal) to the TBOX module. The second A2B processing module sends the received audio signal to the SOC module, the second DSP in the SOC module processes the audio signal, and sends the processed audio signal to the second class D power amplifier. The second class D power amplifier amplifies and processes the audio signal to drive the second loudspeaker module to play the audio. The second MCU controls the second A2B processing module through I2C, synchronizes the audio data stream, and ensures that the first loudspeaker module and the second loudspeaker module play synchronously. That is, in the normal mode, the second loudspeaker module connected to the TBOX module can be reused as an integrated vehicle loudspeaker to participate in the processing of the entire vehicle sound field.

[0029] When an accident occurs or some ECUs in the vehicle audio system fail, the second MCU monitors the A2B interrupt signal (such as bus disconnection or clock lockout) or receives a collision hard-wire signal, and the second MCU synchronously notifies the SOC module to start an emergency call process through UART. The SOC module actively disconnects the connection with the second A2B processing module and stops playing the host audio signal, preventing the problem of calling while playing music.

[0030] Meanwhile, a local ADC (analog-to-digital converter) collects the microphone module signal, the microphone voice is sent to the SOC module, the second DSP processes the microphone voice for noise reduction, echo cancellation, etc. The SOC module starts the network communication module through the UART instruction, establishes an emergency call link, and transmits the microphone voice to the remote rescue center. The remote voice is returned to the SOC module, the second DSP processes the remote voice, and the processed remote voice is sent to the second class D power amplifier. The second class D power amplifier amplifies and processes the audio signal to drive the second loudspeaker module to play the voice, realizing the emergency call function.

[0031] The above is only a preferred embodiment of the present application, and the present application is not limited to the above embodiment. Those skilled in the art can clearly see that the form in the embodiment is not limited to this, and the adjustment mode is also not limited to this. It can be understood that other improvements and changes directly derived or thought of by those skilled in the art without departing from the basic concept of the present application should be considered to be within the protection scope of the present application.

Claims

1. A car audio system having an emergency call function, characterized by comprising: The application relates to a vehicle audio system, which comprises a host computer, a power amplifier module connected with the host computer, a TBOX module connected with the power amplifier module, wherein the power amplifier module is connected with a first speaker module, and the TBOX module comprises a second A2B processing module connected with the power amplifier module through an A2B bus, a SOC module connected with the second A2B processing module, and the SOC module is connected with a second speaker module and a microphone module.

2. The car audio system having an emergency call function according to claim 1, wherein The power amplifier module comprises a first A2B processing module connected with the host computer through an A2B bus.

3. The car audio system having an emergency call function according to claim 2, wherein The power amplifier module comprises a first DSP connected with the first A2B processing module, and a first class-D power amplifier connected with the first DSP, wherein the first class-D power amplifier is connected with the first speaker module through a hard wire.

4. The car audio system having an emergency call function according to claim 3, wherein The power amplifier module comprises a first MCU connected with the first DSP through an SPI interface.

5. The car audio system having an emergency call function according to claim 1, wherein The SOC module comprises a second DSP connected with a second class-D power amplifier, and the second class-D power amplifier is connected with a second speaker module.

6. The car audio system having an emergency call function according to claim 1, wherein The TBOX module comprises an ADC (analog-to-digital converter), the microphone module is connected with the ADC, and the ADC is connected with the SOC module through an I2S bus.

7. The car audio system having an emergency call function according to claim 1, wherein The TBOX module comprises a network communication module connected with the SOC module through a UART interface.

8. The car audio system having an emergency call function according to claim 1, wherein The TBOX module comprises a second MCU connected with the second A2B processing module through an I2C interface, and the second MCU is connected with the SOC module through a UART interface.

9. The car audio system having an emergency call function according to claim 1, wherein The TBOX module comprises a power management module for managing power supply of the TBOX module.

10. The car audio system having an emergency call function according to claim 1, wherein The first speaker module comprises a plurality of speakers arranged at a co-driver seat and a rear seat of a vehicle, and the second speaker module comprises a speaker arranged at a main driver seat of the vehicle.

Images