Automatic diagnosis method of automobile sound loudspeaker and antenna

A car audio and automatic diagnosis technology, which is applied in the direction of measuring devices, instruments, electrical components, etc., can solve the problems of high diagnosis cost, complicated detection method, and low efficiency, and achieve simple diagnosis method, improved detection efficiency, and reduced detection cost Effect

Active Publication Date: 2011-01-05
HUIZHOU DESAY SV AUTOMOTIVE
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Problems solved by technology

[0002] At present, the operation of car audio diagnosis technology is complicated, and it is generally diagnosed through the bus, and special equipment is needed to cooperate with it, such as a diagnostic instrument, and the diagnosis cost is relatively high
For cars without bus, it is impossible to realize di

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  • Automatic diagnosis method of automobile sound loudspeaker and antenna
  • Automatic diagnosis method of automobile sound loudspeaker and antenna
  • Automatic diagnosis method of automobile sound loudspeaker and antenna

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[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] The automatic diagnosis method of the car audio horn and the antenna of the present invention is realized by utilizing the original resource of the car audio (the power amplifier for driving the horn) and expanding the function of the microprocessor MCU.

[0017] like figure 1 , the method sets a sampling resistor R between the positive and negative poles of the loudspeaker of the car audio, the voltage at both ends of the sampling resistor R is finally drawn to a comparator through a series of treatments, and the comparator output is connected to the microprocessor MCU; at the same time The diagnostic pin of the power amplifier that drives the speaker is also connected to the MCU, and the MCU judges the connection status of the speaker according to the detected voltage value output by the diagnostic pin of the power amplifier, and cont...

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Abstract

The invention relates to the technical field of automobile sound, in particular to an automatic diagnosis method of an automobile sound loudspeaker and an antenna. The automatic diagnosis method is characterized in that an automobile sound circuit is respectively provided with a detection circuit for monitoring the loudspeaker or the connection state of two ends of the antenna; the detection circuit outputs a signal to a microprocessor MCU; the MCU controls a display screen to display the detected sate after judging data; the detection circuit comprises a power amplifier, a voltage acquisition unit and a voltage comparison unit, wherein the power amplifier is used for driving the loudspeaker or the antenna, the voltage acquisition unit and the voltage comparison unit are successively connected to the automobile sound loudspeaker or two ends of the antenna, the power amplifier is provided with a diagnosis pin which is connected with the MCU, and the output end of the voltage comparisonunit is connected with the MCU. The diagnosis method of the invention is simple and visual, does not need other diagnosis equipment and greatly improves detection efficiency while lowering detection cost.

Description

technical field [0001] The invention relates to the technical field of car audio, in particular to an automatic diagnosis method for the horn and antenna of the car audio. Background technique [0002] At present, the operation of car audio diagnosis technology is complicated, and it is generally diagnosed through the bus, and special equipment such as a diagnostic instrument is required to perform the diagnosis, and the diagnosis cost is relatively high. For cars without a bus, diagnosis cannot be realized. Car stereos use antennas to receive external information and speakers to broadcast information. These two basic elements must be tested when they leave the factory. Due to the complexity of the detection method and relatively low efficiency, the entire production and operation process is limited. Contents of the invention [0003] The problem to be solved by the present invention is to provide a method for diagnosing the car audio horn and antenna conveniently and qui...

Claims

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Application Information

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IPC IPC(8): H04R29/00G01R31/02
Inventor 张裁会吴波
Owner HUIZHOU DESAY SV AUTOMOTIVE
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