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AVAS module and loudspeaker driving system and method

A driving system and speaker technology, applied in the direction of sensors, transducer circuits, sensor components, etc., can solve the problem of insufficient audio channels, etc., and achieve the effect of simple structure, less hardware, and low cost

Inactive Publication Date: 2022-06-07
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above problems, the present invention provides a driving system and method for an AVAS module and a loudspeaker. By transforming the existing PWM OUT channel, the problem of insufficient audio channels on the current vehicle is solved, and it can be used as a supplement to the existing driving mode.

Method used

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  • AVAS module and loudspeaker driving system and method

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Embodiment

[0040] Example: see Figure 1 ，

[0041] An AVAS module, comprising,

[0042] PWM-to-audio circuit for receiving a level signal and decoding this level signal into an audio signal;

[0043] Power amplification circuit for receiving the audio signal and processing it for power amplification.

[0044] It may also include,

[0045] A loudspeaker that receives an amplified audio signal from a power amplification circuit and emits a sound.

[0046] It may also include,

[0047] Power management chip for power management of AVAS modules. In addition, other peripheral chips can be added according to actual needs, which is highly scalable.

[0048] Based on the above module, the present invention further provides a driving system for AVAS speakers, comprising,

[0049] Vehicle machine system, the user obtains the vehicle's operating status data, the operating state data includes the vehicle's operating status information and vehicle speed information, and generates a level signal through t...

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Abstract

The invention discloses an AVAS module and a loudspeaker driving system and method, and the system consists of an AVAS rear-end module, and is internally provided with a PWM (Pulse Width Modulation)-to-audio circuit and a power amplification circuit. An AVAS algorithm runs on an MCU or a DSP in the vehicle-mounted terminal, PWM signals are output to an AVAS module through a PWM OUT channel on the vehicle-mounted terminal, the AVAS module decodes the PWM signals into audio signals, and after the audio signals are amplified through an internal power amplification circuit, AVAS prompt tones are given out through an AVAS loudspeaker. The invention provides an additional AVAS loudspeaker driving scheme, and compared with an existing driving mode, the AVAS loudspeaker driving method is simple in structure, few in used hardware and low in cost, and does not occupy an additional audio channel; the PWM-to-audio circuit is a simple filter circuit, does not affect the vehicle machine to drive other audio channels, and does not affect the normal realization of the functions of a loudspeaker, an ASE, an RNC and the like in the vehicle.

Description

Technical field [0001] The present invention belongs to the field of automotive electrical technology, more specifically relates to an AVAS module and a loudspeaker drive system and method. Background [0002] Electric vehicle low-speed prompt tone AVAS: 0-20km / h at a speed, the electric vehicle must take the initiative to issue a warning tone to warn pedestrians and other traffic participants, has been international / domestic standardization, GB / T 37153-2018 / UN WP29 R138 (international standard), and the new version of the car 3C compulsory certification rules have been officially implemented, which clearly quotes the electric vehicle low-speed sound (AVAS) national standard GB / T37153-2018, Models applying for certification after April 16, 2021 must meet this standard mandatorily. [0003] The existing AVAS speaker driver solutions are: [0004] 1. Entertainment host / external power amplifier audio output channel control: directly drive AVAS speakers through the car machine or ext...

Claims

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Application Information

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IPC IPC(8): H04R3/00
CPCH04R3/00
Inventor 王嘉鑫孔祥杰唐鹏春官磊王泽锫郭旭东王思琦
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD