KR20140047983A - Apparatus for diagnosing failure of avn system in vehicle - Google Patents

Abstract

The present invention relates to a device and a method for diagnosing the failure of an AVN system for a vehicle. The device can reduce costs by deleting a circuit for checking a connection state by diagnosing the connection state by outputting a specific test signal through a speaker to test the connection state of a microphone and a speaker in an AVN system for a vehicle and extracting a signal input into the microphone and can improve reliability by diagnosing the connection state through an output state. [Reference numerals] (10) Audio input unit; (20) Control unit; (30) Test signal storage unit; (40) Speaker output unit; (5) Key input unit; (50) Display unit; (7) External diagnostic device

Description

Apparatus and method for diagnosing failure of vehicle AV system {APPARATUS FOR DIAGNOSING FAILURE OF AVN SYSTEM IN VEHICLE}

The present invention relates to an apparatus and method for diagnosing a failure of an AVN system for a vehicle, and more particularly, extracts a signal input to a microphone after outputting a specific test signal through a speaker to test a connection state between a microphone and a speaker of the vehicle AVN system. The present invention relates to a failure diagnosis apparatus and method for a vehicle AVN system for diagnosing a connection state.

Recently, audio and multimedia equipment and navigation devices, etc., which are provided in a vehicle have been integrated and integrated. Thus, a system integrating a vehicle navigation device, audio and multimedia equipment is called an AVN system. One display device displays images of different standards, such as images recorded on a video recording medium such as a CD-ROM or a DVD-ROM, a broadcast wave TV image, and a navigation guide image of a navigation device.

Related prior arts include Korean Patent Application Laid-Open No. 10-2007-0059265 (June 12, 2007) "Automatic navigation screen switching device and method of AVN system for vehicles".

In the case of such an AVN system, a circuit for checking a connection state of an audio input / output unit, such as a microphone and a speaker, is configured to check the assembly and function operation when the vehicle is shipped from the factory and perform physical diagnosis.

The present invention provides a fault diagnosis apparatus and method for a vehicle AVN system for diagnosing the connection state by extracting a signal input to the microphone after outputting a specific test signal through the speaker to check the connection state of the microphone and the speaker of the vehicle AVN system Its purpose is to.

An apparatus for diagnosing a failure of an AVN system for a vehicle according to an exemplary embodiment of the present invention includes a test signal storage unit for storing a plurality of test signals distinguished from ambient sounds; A sound input unit which receives ambient sound and processes and outputs a digital signal; A control unit for outputting a test signal stored in the test signal storage unit according to the execution of the diagnostic mode and extracting the test signal from the ambient sound input through the sound input unit to diagnose a failure; And a speaker output unit configured to output a test signal output from the controller through the plurality of speakers.

The present invention is characterized in that it further comprises a key input unit for selecting the execution of the diagnostic mode.

In the present invention, the control unit is characterized in that the diagnosis sequentially by changing a plurality of test signals for a plurality of speakers.

In the present invention, when the execution of the diagnostic mode is selected from the external diagnostic device, the controller outputs the diagnostic result to the external diagnostic device.

In the present invention, the speaker output unit is characterized in that for setting the volume differently according to the position of the sound input unit and the plurality of speakers to output.

The present invention is characterized in that it further comprises a display unit for outputting a diagnosis result diagnosed by the control unit.

According to another aspect of the present invention, there is provided a method for diagnosing a failure of an AVN system for a vehicle, including selecting a test signal stored in a test signal storage unit as a diagnostic mode is executed; Receiving ambient sound through a sound input unit while outputting the test signal for each speaker; Detecting an inspection signal by signal processing ambient sound; And outputting whether the sound input unit and each speaker are normal according to the detection result of the test signal.

The present invention is characterized by selecting different test signals as repeated in the step of selecting a test signal.

The present invention is characterized in that the volume is set differently according to the distance from the sound input unit when outputting the test signal for each speaker.

The present invention outputs a specific test signal through the speaker to check the connection state of the microphone and speaker of the vehicle AVN system, and then extracts the signal input to the microphone to diagnose the connection state, thereby eliminating the circuit for the connection state test cost. In addition to reducing the cost, the reliability can be improved by diagnosing through the functional output.

1 is a block diagram showing a failure diagnosis apparatus for a vehicle AVN system according to an embodiment of the present invention.
2 is a configuration diagram showing a diagnosis environment by a failure diagnosis apparatus of a vehicle AVN system according to an embodiment of the present invention.
3 is a flowchart illustrating a fault diagnosis method of an AVN system for a vehicle according to an exemplary embodiment of the present invention.

Hereinafter, an embodiment of an apparatus and method for diagnosing a failure of an AVN system for a vehicle according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing a failure diagnosis apparatus for a vehicle AVN system according to an embodiment of the present invention, Figure 2 is a configuration showing a diagnosis environment by a failure diagnosis apparatus for a vehicle AVN system according to an embodiment of the present invention It is also.

1 and 2, the apparatus for diagnosing a failure of an AVN system for a vehicle according to an exemplary embodiment of the present invention includes a key input unit 5, an inspection signal storage unit 30, an acoustic input unit 10, and a control unit 20. And a display unit 50 including a speaker output unit 40.

The key input unit 5 selects execution of a diagnosis mode for diagnosing a failure of the vehicle AVN system.

At this time, the execution of the diagnostic mode may be executed in the external diagnostic device 7 through the OBD (ON Board Diagnostics) terminal of the vehicle.

When the diagnostic mode is executed in the external diagnostic device 7 as described above, the fault diagnosis result is transmitted to the external diagnostic device 7 by CAN communication.

The external diagnosis device 7 is connected to the OBD terminal of the vehicle and is a device for monitoring and diagnosing the operation state of the vehicle through CAN communication.

The test signal storage unit 30 is a plurality of tests that can be distinguished from the ambient sound when receiving the sound output through the plurality of speakers (FL, FR, RL, RR) through the microphone (MIC), the sound input unit 10 Save the signal.

That is, a plurality of test signals having different frequencies are stored as single tone sine wave signals which are not generated in a general environment.

The sound input unit 10 receives the ambient sound through a microphone MIC and processes and outputs a digital signal.

The sound input unit 10 removes noise, filters, and samples the sound signal input through the microphone MIC, and outputs the digital signal.

The control unit 20 executes the diagnostic mode according to the selection of the key input unit 5 or the external diagnostic device 7 to output the test signal stored in the test signal storage unit 30 and the peripheral inputs through the sound input unit 10. Diagnose fault by extracting test signal of specific frequency from sound.

In addition, the controller 20 sequentially outputs a test signal to a plurality of speakers FL, FR, RL, and RR, and selects and outputs a different test signal among a plurality of test signals, thereby distinguishing the ambient noise from the test signal. This can minimize errors that can occur.

That is, the error can be minimized by repeatedly outputting and inspecting different test signals while performing fault diagnosis.

The speaker output unit 40 outputs the test signals output from the controller 30 through the plurality of speakers FL, FR, RL, and RR, respectively, and the sound input unit 10 and the plurality of speakers FL, FR, and RL. , By setting the volume differently according to the position of the RR, the volume of the ambient sound input to the sound input unit 10 is constant.

The plurality of speakers FL, FR, RL, and RR installed in the vehicle are provided with a front left speaker FL and a front right speaker FR on the side of the driver's seat and the passenger seat, respectively, and the rear left speaker RL behind the passenger. ) And rear right speaker RR are installed respectively.

Therefore, when the sound input unit 10 is installed in the instrument panel 60 of the driver's seat, the volume of the ambient sound input through the sound input unit 10 is increased by increasing the volume according to the distance based on the front left speaker FL. do.

The display unit 50 outputs the diagnosis result diagnosed by the control unit 20. At this time, the color may be displayed or blinked differently for normal and error, and a warning sound may be generated.

As described above, according to the fault diagnosis apparatus of the vehicle AVN system according to the present invention, when the diagnosis mode is selected through the key input unit 5 or the external diagnosis apparatus 7, the control unit 20 checks the test signal stored in the test signal storage unit 30. By outputting a signal through a plurality of speakers (FL, FR, RL, RR) respectively, extracting a test signal from the ambient sound input through the audio input unit 10, the function of the AVN system as well as the corresponding speaker (FL, FR, It is possible to diagnose the connection status of RL, RR) and microphone (MIC).

3 is a flowchart illustrating a fault diagnosis method of an AVN system for a vehicle according to an exemplary embodiment of the present invention.

As shown in FIG. 3, in the fault diagnosis method of the AVN system for a vehicle according to an exemplary embodiment of the present invention, when the execution of the diagnosis mode is selected through the key input unit 5, the control unit 20 checks the test signal storage unit 30. Select the test signal stored in (S10).

At this time, the execution of the diagnostic mode can also be selected through the external diagnosis device 7.

The test signal may store a plurality of sine wave signals having different frequencies.

That is, by using a single tone sine wave signal that does not occur in a general environment as a test signal, it can be distinguished from noise of a factory or the surrounding environment.

Thereafter, the selected test signal is sequentially output to the plurality of speakers FL, FR, RL, and RR, and the ambient sound is input through the sound input unit 10 (S20).

At this time, the volume of the test signal output to the plurality of speakers FL, FR, RL, RR is set differently according to the distance from the sound input unit 10 so as to be output at a constant volume to the sound input unit 10.

The ambient sound input through the sound input unit 10 performs noise removal and filtering through signal processing, samples and converts it into a digital signal and outputs it (S40).

Thereafter, the controller 20 detects a specific frequency of the test signal from the ambient sound converted into the digital signal and outputs whether the sound input unit 10 and the plurality of speakers FL, FR, RL, and RR are normal (S50). .

For example, when the test signal is output through the rear right speaker RR, the test signal is extracted from the ambient sound input from the sound input unit 10 to determine whether the microphone MIC and the rear right speaker RR have failed. .

Therefore, in the case of normal output the normal state and in the case of an error outputs the error state so that the worker can be recognized at the time of shipment (S60) (S70).

In addition, when the execution of the diagnostic mode is selected through the external diagnostic device (7) it is possible to output the diagnosis results to the external diagnostic device (7) for diagnosis.

The above fault diagnosis process can be repeated several times, and if it is repeated, the error can be minimized by selecting and checking different test signals.

As described above, according to the fault diagnosis method of the vehicle AVN system according to the present invention, when the diagnosis mode is selected through the key input unit 5 or the external diagnosis apparatus 7, the controller 20 checks the test signal stored in the test signal storage unit 30. By outputting a signal through a plurality of speakers (FL, FR, RL, RR) respectively, extracting a test signal from the ambient sound input through the audio input unit 10, the function of the AVN system as well as the corresponding speaker (FL, FR, It is possible to diagnose the connection status of RL, RR) and microphone (MIC).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

5: key input unit 10: sound input unit
20: control unit 30: inspection signal storage unit
40: speaker output unit 50: display unit
60: instrument panel

Claims (9)

An inspection signal storage unit for storing a plurality of inspection signals distinguished from ambient sounds;
A sound input unit which receives the ambient sound and processes and outputs the digital signal;
A control unit for outputting the test signal stored in the test signal storage unit and extracting the test signal from the ambient sound input through the sound input unit to diagnose a failure according to execution of a diagnosis mode; And
And a speaker output unit for outputting the test signal output from the control unit through a plurality of speakers, respectively.
The apparatus of claim 1, further comprising a key input unit for selecting execution of the diagnostic mode.
The apparatus of claim 1, wherein the control unit sequentially diagnoses the plurality of speakers while changing the test signal.
The apparatus of claim 1, wherein the controller outputs a diagnosis result to the external diagnostic device when execution of the diagnostic mode is selected from an external diagnostic device.
The apparatus of claim 1, wherein the speaker output unit sets and outputs a volume differently according to positions of the sound input unit and the plurality of speakers.
The apparatus of claim 1, further comprising a display unit for outputting a diagnosis result diagnosed by the control unit.
Selecting a test signal stored in the test signal storage unit as the diagnostic mode is executed;
Receiving ambient sound through a sound input unit, respectively outputting the test signal to a plurality of speakers;
Detecting the inspection signal by signal processing the ambient sound; And
And outputting whether the sound input unit and the plurality of speakers are normal according to a result of detecting the test signal.
The method of claim 7, wherein different test signals are selected as repeated in the step of selecting the test signals.
The method of claim 7, wherein the volume is set differently according to a distance from the sound input unit when the test signals are output for each of the plurality of speakers.

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