Feedback audio output detection method and device

Abstract

The present invention discloses a feedback audio output detection method. The method comprises: emitting digital audio signals to be played; performing digital-to-analogue conversion of the digital audio signals, amplifying the obtained analog audio signals and outputting and playing the analog audio signals after performing low-pass filtering processing; performing filtering and digital sampling of the output and played analog audio signals, performing feedback analysis of the obtained sampling audio signals, and determining whether an audio player system works abnormally or not; and closing a power supply and emitting fault alarm signals when the audio player system works abnormally. The present invention further provides a feedback audio output detection device. The device comprises an information processing module, an audio processing module, a power amplification module, a first low-pass filtering module, an audio output module and a second low-pass filtering module. The feedback audio output detection device is able to rapidly detect the work state of an audio output circuit and close a power supply and emit alarm signals when the exception of audio output happens so as to guarantee the normal work of the audio output circuit.

Description

technical field [0001] The invention relates to the technical field of circuit detection, in particular to a feedback audio output detection method and device. Background technique [0002] With the development of automobiles, more and more assisted driving systems have become an integral part of automobiles due to the safety and convenience they bring to driving. At present, the voice system on the car has almost become the standard configuration in the intelligent driving system, and it has unique advantages in prompting the driver to drive, driving safety, and intelligent control. Especially in the current rapid development of ADAS (Advanced Driver Assistant System, Advanced Driver Assistance System) in the automotive industry, voice reminders are particularly important. [0003] The traditional car audio output circuit is an open-loop control circuit. [0004] see figure 1 , is a schematic diagram of a circuit structure of a vehicle audio output circuit in the prior a...

AI Technical Summary

Problems solved by technology

This audio output technical solution has two main features: first, the circuit is an open-loop control in terms of control strategy, that is, no matter whether the output exists, the audio processing module 105 will continue to output signals; When the driver gives a voice prompt, the driver will not get the predetermined voice prompt information, and there will be a huge hidden danger in driving safety.

Second, if the follow-up circuit of the audio chip fails, the power supply of the faulty circuit will be allowed without the system's knowledge, which may affect the normal operation of other circuits, thereby expanding the scope of the fault and affecting the normal operation of the entire system. pose a threat

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