KR20150137557A - Apparatus and method for checking connection between terminals of AVN system - Google Patents

Abstract

The present invention relates to a terminal coupling diagnosis system used in an audio/video navigation (AVN) system and a method thereof. The device adds a circuit to a head unit (H/UNIT) of an audio navigation unit or AVN unit for automatic diagnosis, utilizes an existing signal line such as an AUX_DETECT line without adding separate cables, and configures an AUX cable and a USB cable separately in order to simultaneously diagnose the connection of two bundled cables. According to the present invention, the device includes: a power discharging unit which discharges the power supply applied to a multimedia terminal unit for outputting an audio signal in the AVN system; a power supply unit which applies the power to the multimedia terminal unit while a first external output terminal and a second external output terminal of the multimedia terminal unit are connected to each other; and a terminal coupling status determining unit which determines the terminal coupling status of the AVN system, based on a voltage detected from the multimedia terminal unit.

Description

[0001] The present invention relates to an apparatus and method for detecting a terminal connection of an AVN system,

The present invention relates to an apparatus and a method for diagnosing a fastening state of terminals constituting an AVN (Audio Video Navigation) system. More particularly, the present invention relates to an apparatus and method for diagnosing a fastening state of terminals constituting an AVN system in a vehicle.

In the AVN system for the vehicle, the multimedia terminal consists of a USB SOCKET A TYPE connector for playing USB media such as USB memory and iPod, and a 3.5Φ stereo socket for Auxility stereo analog audio signal input. Also, the multimedia terminal, AUDIO and AVN H / UNIT are connected with the wire harness.

However, in the AVN system of the related art, it is impossible to confirm whether or not the cable between the multimedia terminal and AUDIO and AVN H / UNIT is connected. In other words, the AUX_DET signal has a logic structure that gives an H signal when the 3.5Φ stereo terminal is connected and an L signal when it is not connected. Therefore, it is impossible to judge whether or not the cable between the multimedia and AUDIO and AVN H / UNIT terminals is connected. Therefore, conventionally, the operator has had to judge directly by visual inspection and operation inspection in the car jacket production and automobile assembly line. In this way, the pre-inspection is not properly performed, and conventionally, there has been an inconvenience that the vehicle must be disassembled and inspected in order to inspect the work in the event of a defect.

Korean Patent No. 785,690 discloses a method of determining whether or not a cable connecting between a transmitter and a receiver is connected to a separate cable for connecting the ground of the receiver and a pull- There are technical drawbacks such as.

First, circuit matching is necessary at the transmitter and receiver stages. Second, separate diagnostic cables and pins must be added to the jack. Third, only one cable bundle connection diagnosis with one jack is possible.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide an apparatus and a method for automatically diagnosing an audio or AVN by adding a circuit for only H / UNIT and utilizing an existing signal line such as AUX_DETECT, The present invention is directed to an apparatus and method for diagnosing a terminal connection failure of an AVN system which is constituted by a separate jack so that two bundled cable connection diagnoses can be simultaneously performed.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an AVN system, A power supply unit for applying the power to the multimedia terminal unit while the first external output terminal and the second external output terminal of the multimedia terminal unit are connected to each other; And a terminal fastening state determiner for determining the fastening state of the terminal in the AVN system based on the voltage detected from the multimedia terminal.

Preferably, the power application unit uses a USB terminal as the first external output terminal and an external speaker connection terminal as the second external output terminal.

Preferably, the power applying unit applies the power while the first external output terminal and the second external output terminal are connected to each other by using a resistor.

Preferably, the power source discharge unit discharges the power source using a control unit for controlling the AVN system and a USB power source connected to a line connecting the multimedia terminal unit. The power source unit may be a DC power source or AC The power source is used to apply the power source.

Preferably, the terminal fastening diagnostic apparatus of the AVN system further includes a fastening state output unit for outputting the fastening state audibly.

According to another aspect of the present invention, there is provided an AVN system including: a power source for discharging a power applied to a multimedia terminal for outputting an audio signal; Applying power to the multimedia terminal unit while connecting a first external output terminal and a second external output terminal of the multimedia terminal unit to each other; And determining a connection state of the multimedia terminal in the AVN system based on a voltage detected from the multimedia terminal unit.

Preferably, the application step uses a USB terminal as the first external output terminal and an external speaker connection terminal as the second external output terminal.

Preferably, the applying step applies the power while connecting the first external output terminal and the second external output terminal using a resistor.

Preferably, the step of discharging discharges the power source using a control unit for controlling the AVN system and a USB power source connected to a line connecting the multimedia terminal unit, Or the AC power source.

Preferably, after the step of determining, the step of outputting the state of engagement is performed audibly.

The present invention can automatically detect whether a multimedia terminal connected to the HKMC AUDIO or AVN is connected or not, thereby obtaining the following effects.

First, the audio / AVN H / UNIT can be added to circuit for automatic diagnosis.

Second, it is unnecessary to add a separate cable by utilizing existing signal lines such as AUX_DETECT.

Third, the USB cable and AUX cable are configured as separate jacks, which enables simultaneous diagnosis of two bundled cables.

Fourth, automation verification in the car kit module and automobile production line can prevent the production worker's fault in advance.

1 is a schematic block diagram of a diagnostic system for automated diagnosis of whether or not a multimedia terminal is fastened according to an embodiment of the present invention.
2 to 4 are partial detail views of the diagnostic system shown in Fig.
5 is a flowchart illustrating an automatic diagnosis process of whether or not a multimedia terminal is connected according to an embodiment of the present invention.
FIG. 6 is a block diagram schematically showing a terminal fastening diagnostic apparatus of an AVN system according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

1 is a schematic block diagram of a diagnostic system for automated diagnosis of whether or not a multimedia terminal is fastened according to an embodiment of the present invention. And Figs. 2 to 4 are partial detail views of the diagnostic system shown in Fig.

The diagnostic system 100 according to one embodiment of the present invention is for automotive inline multimedia terminal connector engagement automated diagnosis.

In the vehicle assembly line, it is required to add an automatic diagnosis mode in accordance with the occurrence of many defective fastening of the multimedia terminal connector. The diagnostic system 100 according to the present invention is for this purpose and can proceed without changing the current multimedia terminal and diagnoses the AUX and USB connector connec- tion through the AUX DETECT input.

The H / UNIT 110 includes a USB 5V power supply circuit 111, an MCU 112, a voltage detection circuit 1 113, a first connector 114 and a second connector 115.

The USB 5V power supply circuit 111 is a power supply circuit of a USB device connected to the multimedia terminal 120. [ The MCU 112 adjusts the on / off state of the circuit 111.

The MCU 112 processes the power, system, and communication of the audio / AVN H / UNIT 110 and determines whether or not the AUX 3.5Φ STEREO JACK 123 is inserted into the signal received from the voltage detection circuit 1 (113) The AUX ANALOG AUDIO signal is amplified and output to the vehicle speaker. In the present embodiment, the MCU 112 may be constituted by a CPU.

The voltage detection circuit 1 (113) detects the voltage from the AUX detection circuit 122 of the multimedia terminal 120 and delivers it to the MCU 112.

The multimedia terminal 120 includes a USB A-TYPE socket 121, an AUX JACK connection detection circuit 122, an AUX 3.5 PHASE STEREO JACK 123, a resistor 124, a third connector 125 and a fourth connector 126 ).

USB SOCKET A (121) is a USB TYPE A socket that connects a USB device. The USB SOCKET A 121 comprises a USB 5V power source, GND, D +, D-, etc., and supplies power to a USB device connected through a USB 5V power supply circuit 111.

The AUX JACK connection detection circuit 122 is a circuit for detecting whether or not the AUX 3.5Φ STEREO JACK 123 is connected and is transmitted to the voltage detection circuit 1 113 of H / UNIT (PULL UP) by using a USB 5V power supply . The AUX JACK connection detection circuit 122 outputs a 5V voltage when the JACK is connected and outputs a 0V voltage when not connected.

The AUX 3.5Φ STEREO SOCKET (123) is a SOCKET that connects an external device that reproduces the ANALOG AUDIO signal. It is composed of ANALOG LEFT, ANALOG RIGHT, GND, and so on.

However, it is impossible to judge whether the cable between the multimedia terminal 120 and the H / UNIT 110 is properly connected by judging the 0V voltage output when the AUX 3.5Φ STEREO JACK 123 is not connected. This is because 0 V is output even when no cable is connected.

Therefore, in the present invention, the power supply circuit 117 and the voltage detection circuit 116 are added to the H / UNIT 110 to determine whether the cable between the H / UNIT 110 and the multimedia terminal 120 is connected.

The power applying circuit 117 turns off the 5V USB power supply circuit 111 through the MCU 112 and applies power to the AUX DETECT signal. The applied power is transmitted to the multimedia terminal 120 and is applied to the USB 5V of the H / UNIT 110 through the resistor 124 connected to the USB 5V line.

The voltage detection circuit 2 116 detects the voltage applied to the USB 5V and transmits the result to the MCU 112 to determine whether the cable between the H / UNIT 110 and the multimedia terminal 120 is connected.

2 is a power supply switch circuit for an AUX DETECT input, and shows a configuration in which a connector engagement detection circuit is added to the USB 5V power supply circuit 111. [

3 shows a first cable connection configuration between the third connector 125 and the USB A-type socket 121 in the multimedia terminal 120 and a second cable connection configuration between the fourth connector 126 and the AUX 3.5Φ STEREO socket 123. [ Shows a connection configuration, and shows a configuration in which a USB_5V line and an AUX_DET line are connected using resistances of the first cable connection configuration and the second cable connection configuration.

More detailed cable configuration is shown in Table 1 below.

Signal name Explanation Remarks USB 5V USB MEDIA operation and charging power 5V USB CABLE USB D + USB DATA + USB CABLE USB D- USB DATA - USB CABLE USB GND USB ground USB CABLE AUX_L AUXILITY Analog LEFT signal input AUX SIGNAL CABLE AUX_R AUXILITY Analog RIGHT signal input AUX SIGNAL CABLE AUX_DET Check whether 3.5Φ stereo terminal is tightened AUX SIGNAL CABLE AUX_GND AUXILITY ground AUX SIGNAL CABLE

4 shows a configuration in which a power supply switch circuit is added to an AUX DETECT input.

5 is a flowchart illustrating an automatic diagnosis process of whether or not a multimedia terminal is connected according to an embodiment of the present invention. The following description refers to Figs. 1 to 5.

The diagnostic system 100 automatically starts the diagnosis through the H / UNIT engineering mode or the production line diagnostic mode (S105).

Thereafter, the diagnostic system 100 turns off the USB 5V power as shown in FIG. 2 and discharges the power applied to the multimedia terminal internal AUX_DET (S110).

Then, the diagnostic system 100 applies DC or AC power to the AUX_DET as shown in FIG. 4 (S115). At this time, the voltage applied to the AUX DET through the resistor 124 shown in FIG. 3 is applied to the USB 5V.

Then, the diagnosis system 100 determines whether the cable connection between the multimedia terminal 120 and the AUDIO / AVN H / UNIT 110 is completed through the power detection circuit of FIG. 2 (S120, S125).

If no power is detected in the power detection circuit, the diagnostic system 100 propagates the cable unfastened state through communication with the display, sound, or other device of the AUDIO, AVN H / UNIT 110 (S135, S140) .

On the other hand, if power is normally detected in the power detection circuit, AVN H / UNIT 110 through the communication with the display, sound, or other device (S130, S140). That is, the diagnosis system 100 transmits an automatic diagnosis result through the vehicle network together with the notification through the display device of the H / UNIT 110 or sound generation.

Thereafter, the diagnosis system 100 turns off the power supply switch connected to the AUX_DET via the power detection circuit 2 OFF (S145) (S150).

Thereafter, the diagnostic system 100 turns on the USB 5V power (S155) and operates the multimedia terminal 120 normally (S160).

According to the present invention described above, automation diagnosis can be added to the car kit module and the car assembly line to prevent rework due to work defects in advance. According to the present invention, it is also possible to reduce the production cost due to the reduction in defects.

1 to 5, an embodiment of the present invention has been described. Hereinafter, preferred embodiments of the present invention which can be noted from the above embodiment will be described.

FIG. 6 is a block diagram schematically showing a terminal fastening diagnostic apparatus of an AVN system according to a preferred embodiment of the present invention.

6, the terminal connection diagnosis apparatus 600 of the AVN system includes a power discharging unit 610, a power applying unit 620, a terminal connection state determining unit 630, a power supply unit 640, and a main control unit 650 .

The power supply unit 640 performs a function of supplying power to each configuration of the terminal connection diagnostic apparatus 600. [ The main control unit 650 performs a function of controlling the overall operation of each constituent constituting the terminal fastening diagnostic apparatus 600. [ The power supply unit 640 and the main control unit 650 may not be provided in the present embodiment in consideration of the fact that the terminal fastening diagnostic apparatus 600 can be controlled by the ECU of the vehicle.

The power discharger 610 discharges the power applied to the multimedia terminal for outputting an audio signal in the AVN system.

The power application unit 620 applies power to the multimedia terminal unit in a state where the first external output terminal and the second external output terminal of the multimedia terminal unit are interconnected.

The power application unit 620 may use a USB terminal as a first external output terminal and an external speaker connection terminal as a second external output terminal.

The power applying unit 620 may apply power to the first external output terminal and the second external output terminal by using a resistor.

The power source discharging unit 610 discharges power using a USB power source connected to a line connecting the control unit for controlling the AVN system and the multimedia terminal unit, and the power applying unit 620 is a DC power source or an AC power source It is possible to apply the power source. The control unit is the same concept as the AVN H / U.

The terminal fastening state determination unit 630 determines the fastening state of the terminal in the AVN system based on the voltage detected from the multimedia terminal unit.

The terminal fastening diagnostic apparatus 600 may further include a fastened state output unit 660.

The fastening state output unit 660 performs a function of audibly outputting the fastening state of the terminal in the AVN system.

Next, an operation method of the terminal fastening diagnostic apparatus of the AVN system will be described.

First, the power source discharge unit 610 discharges the power applied to the multimedia terminal unit for outputting an audio signal in the AVN system.

Then, the power application unit 620 applies power to the multimedia terminal unit in a state where the first external output terminal and the second external output terminal of the multimedia terminal unit are mutually connected.

The terminal connection state determination unit 630 determines the connection state of the multimedia terminal in the AVN system based on the voltage detected from the multimedia terminal unit.

Meanwhile, the connection state output unit 660 can visually output the connection state of the multimedia terminal in the AVN system.

It is to be understood that the present invention is not limited to these embodiments, and all elements constituting the embodiment of the present invention described above are described as being combined or operated in one operation. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. In addition, such a computer program may be stored in a computer readable medium such as a USB memory, a CD disk, a flash memory, etc., and read and executed by a computer to implement an embodiment of the present invention. As the recording medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like can be included.

Furthermore, all terms including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined in the Detailed Description. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (7)

A power discharger for discharging power applied to a multimedia terminal for outputting an audio signal in an AVN system;
A power supply unit for applying the power to the multimedia terminal unit while the first external output terminal and the second external output terminal of the multimedia terminal unit are connected to each other; And
A terminal clamping state judging unit for judging the clamping state of the terminal in the AVN system based on the voltage detected from the multimedia terminal unit,
And the terminal connection diagnosis device of the AVN system. The method according to claim 1,
Wherein the power applying unit uses a USB terminal as the first external output terminal and uses an external speaker connecting terminal as the second external output terminal. The method according to claim 1,
Wherein the power applying unit applies the power while the first external output terminal and the second external output terminal are connected to each other by using a resistor. The method according to claim 1,
Wherein the power source discharge unit discharges the power source using a control unit for controlling the AVN system and a USB power source connected to a line connecting the multimedia terminal unit,
Wherein the power applying unit applies the power using DC power or AC power connected to the line. The method according to claim 1,
A fastening state outputting unit for outputting the fastening state audibly
Further comprising: a terminal connection diagnosing device for an AVN system. Discharging a power applied to a multimedia terminal unit for outputting an audio signal in an AVN system;
Applying power to the multimedia terminal unit while connecting a first external output terminal and a second external output terminal of the multimedia terminal unit to each other; And
Determining a connection state of the multimedia terminal in the AVN system based on a voltage detected from the multimedia terminal unit
And connecting the AVN system to the terminal. The method according to claim 6,
Wherein the applying step applies the power while the first external output terminal and the second external output terminal are connected to each other by using a resistor.

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