Automatic fault detection method of audio circuit

An automatic detection and audio circuit technology, applied in electrical components, speech analysis, instruments, etc., can solve problems such as low detection efficiency, manual detection cannot achieve automatic detection, and detection accuracy cannot be guaranteed.

Active Publication Date: 2018-02-27
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology

Due to the uncertainty of the human ear when working for a long time, the accuracy of detection cannot be guaranteed when there are a large number of

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  • Automatic fault detection method of audio circuit
  • Automatic fault detection method of audio circuit
  • Automatic fault detection method of audio circuit

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[0062] The basic realization principle of the present invention:

[0063] By introducing the concept of radian, the sampling data for similarity comparison is screened, and the key sampling points that can reflect the audio changes are selected. First, by converting the audio data time series into a radian time series, calculate the trend deviation of the radian segment according to the sampling time, and calculate the trend deviation one by one according to the set trend deviation threshold. When the trend deviation is greater than or equal to the threshold, the sampling point and the corresponding The arc time is the key point to realize the compression of the comparison data of the arc sequence, so that the amount of data required for calculation is reduced while maintaining a certain accuracy, and the calculation efficiency is improved. The present invention limits the maximum compression ratio by setting the expected compression factor parameter. Through the key points form...

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Abstract

The invention belongs to the field of onboard embedded software, and relates to an automatic fault detection method of an audio circuit, solving the detection problem of an onboard audio acquisition circuit fault. Compared with an existing detection method, the detection method provided by the invention has the advantages of being quick, convenient to transplant, low in cost and convenient to achieve automation, and specifically comprises the steps of 1, modeling a time sequence of an audio signal; 2, defining a radian concept to express a waveform variation trend of audio data; 3, compressingthe audio data by using trend importance; 4, computing a trend deviation and an amplitude deviation of the audio signal; and 5, defining similarity to judge whether the audio acquisition circuit breaks down.

Description

technical field [0001] The invention belongs to airborne embedded software, and in particular relates to a fault detection method for an acquisition circuit in an audio acquisition system. Background technique [0002] The audio data acquisition system is an important part of the avionics system and is responsible for collecting cabin sounds. The audio acquisition system is mainly realized based on the audio acquisition circuit, and the failure of the audio acquisition circuit is related to whether the cabin sound can be collected effectively, so it is very important for the fault detection of the audio acquisition circuit. [0003] The existing fault detection method for the audio collection circuit is mainly through detecting the physical level of the audio collection digital circuit and manually inputting voice and observing whether the output is consistent with the input. Among them, the physical level detection method designs a special hardware circuit to test the leve...

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Application Information

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IPC IPC(8): H04R29/00G10L25/51
Inventor 韩康周斌赵腊才张军才马晓晨
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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