KR102173989B1 - Apparatus and method for checking connection between terminals of AVN system - Google Patents

Abstract

In the present invention, only audio or AVN H/UNIT circuits are added for automatic diagnosis, and additional cables are not required by using existing signal lines such as AUX_DETECT, and the USB cable and the AUX cable are composed of separate jacks. A terminal connection diagnosis device and method of an AVN system capable of simultaneously diagnosing cable connection are proposed. An apparatus for diagnosing terminal connection of an AVN system according to the present invention includes: a power discharge unit for discharging power applied to a multimedia terminal unit for outputting an audio signal in the AVN system; A power applying unit for applying power to the multimedia terminal unit in a state in which the first external output terminal of the multimedia terminal unit and the second external output terminal are interconnected; And a terminal fastening state determination unit determining a fastening state of a terminal in the AVN system based on a voltage detected from the multimedia terminal unit.

Description

Device and method for diagnosing terminal connection of AVN system {Apparatus and method for checking connection between terminals of AVN system}

The present invention relates to an apparatus and method for diagnosing the fastening state of terminals constituting an audio video navigation (AVN) system. More specifically, it relates to an apparatus and method for diagnosing the fastening state of terminals constituting an AVN system in a vehicle.

In the vehicle AVN system, the multimedia terminal is composed of a USB SOCKET A TYPE connector for USB media playback such as USB memory and iPod, and a 3.5Φ stereo socket for Auxility stereo analog audio signal input. Also, multimedia terminal, AUDIO, and AVN H/UNIT are connected with WIRE HARNESS through connectors.

However, in a conventional vehicle AVN system, it is not possible to check whether a cable is connected between the multimedia terminal and the AUDIO and AVN H/UNIT. That is, the AUX_DET signal has a logic structure that gives H signal when a 3.5Φ stereo terminal is connected, and L signal when not connected, so it cannot be determined whether a cable is connected between multimedia and AUDIO and AVN H/UNIT terminals. Therefore, in the conventional car kit production and automobile assembly line, the operator had to directly determine by visual and operation inspection. Since the pre-inspection is not properly performed as described above, conventionally, when a defect occurs, the vehicle has to be disassembled and investigated for work inspection.

Korean Patent No. 785,690 relates to a method of determining whether a cable connecting a transmitter and a receiver is connected, and is a method of diagnosing by adding a separate cable connecting the ground of the receiver and a pull-up resistor of the controller. There are technical disadvantages such as.

First, circuit matching is essential 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 consisting of one jack is possible.

The present invention was conceived to solve the above problems, and automatically diagnoses only audio or AVN H/UNIT circuits by adding circuits, and additional cables are not required by using existing signal lines such as AUX_DETECT, and USB cables and AUX cables An object of the present invention is to propose an apparatus and method for diagnosing terminal connection of an AVN system, which is composed of a separate jack and enables diagnosis of connection of two bundled cables at the same time.

However, the object of the present invention is not limited to the above-mentioned matters, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention has been conceived to achieve the above object, comprising: a power discharge unit for discharging power applied to a multimedia terminal unit for outputting an audio signal in an AVN system; A power applying unit for applying the power to the multimedia terminal unit in a state in which the first external output terminal and the second external output terminal of the multimedia terminal unit are interconnected; And a terminal connection state determination unit determining a connection state of a terminal in the AVN system based on a voltage detected from the multimedia terminal unit.

Preferably, the power applying 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 in a state in which the first external output terminal and the second external output terminal are interconnected using a resistor.

Preferably, the power discharging unit discharges the power by using a USB power connected to a line connecting the control unit for controlling the AVN system and the multimedia terminal unit, and the power applying unit is DC power or AC connected to the line. Apply the power using power.

Preferably, the device for diagnosing terminal fastening of the AVN system further includes a fastening state output unit for audio-visually outputting the fastening state.

In addition, the present invention includes the steps of discharging power applied to a multimedia terminal unit for outputting an audio signal in an AVN system; Applying the power to the multimedia terminal in a state in which the first external output terminal and the second external output terminal of the multimedia terminal are interconnected; And determining a connection state of the multimedia terminal in the AVN system based on the voltage detected from the multimedia terminal unit.

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

Preferably, in the applying step, the power is applied while the first external output terminal and the second external output terminal are interconnected using a resistor.

Preferably, in the discharging step, the power is discharged by using a USB power supply connected to a line connecting the control unit controlling the AVN system and the multimedia terminal unit, and the applying step is a DC power supply connected to the line Alternatively, the power is applied using AC power.

Preferably, after the determining step, further comprising the step of audio-visually outputting the fastening state.

The present invention can obtain the following effects by automatically diagnosing whether a multimedia terminal connected to HKMC AUDIO or AVN is connected.

First, only audio or AVN H/UNIT can be automatically diagnosed by adding circuitry.

Second, it is not necessary to add additional cables by using existing signal lines such as AUX_DETECT.

Third, the USB cable and AUX cable are composed of separate jacks, so it is possible to diagnose the connection of two bundled cables at the same time.

Fourth, through automatic verification in the car kit module and automobile production line, it is possible to block the work defect of the production worker in advance.

1 is a schematic configuration diagram of a diagnostic system for automated diagnosis of whether a multimedia terminal is fastened according to an embodiment of the present invention.
2 to 4 are partial detailed views of the diagnostic system shown in FIG. 1.
5 is a flowchart illustrating an automated diagnosis process of whether a multimedia terminal is fastened according to an embodiment of the present invention.
6 is a block diagram schematically showing a terminal fastening diagnosis 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. First, in adding reference numerals to elements of each drawing, it should be noted that the same elements are to have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, a preferred embodiment of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto, and may be modified and variously implemented by those skilled in the art.

1 is a schematic configuration diagram of a diagnostic system for automated diagnosis of whether a multimedia terminal is fastened according to an embodiment of the present invention. And FIGS. 2 to 4 are partial detailed views of the diagnostic system shown in FIG. 1.

The diagnostic system 100 according to an embodiment of the present invention is for automating diagnosis of connection of a vehicle inline multimedia terminal connector.

In the vehicle assembly line, the addition of an automated diagnosis mode is required due to the occurrence of a large number of non-fastening defects in multimedia terminal connectors. 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 connection of AUX and USB connectors 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 circuit 111 is a power supply circuit for a USB device connected to the multimedia terminal 120. The MCU 112 controls the on/off of this circuit 111.

The MCU 112 processes the power, system, and communication of the audio/AVN H/UNIT 110, and determines whether the AUX 3.5Φ STEREO JACK 123 is inserted as a signal received from the voltage detection circuit 1 113. After judging, the AUX ANALOG AUDIO signal is amplified and output to the vehicle speaker. In this embodiment, the MCU 112 may be configured with a CPU.

The voltage detection circuit 1 113 detects a voltage from the AUX detection circuit 122 of the multimedia terminal 120 and transmits 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 3.5Φ STEREO JACK 123, a resistor 124, a third connector 125 and a fourth connector 126. ).

The USB SOCKET A 121 is a USB TYPE A socket for connecting a USB device. The USB SOCKET A 121 is composed of a USB 5V power source, GND, D+, D-, etc., and supplies power to a USB device connected through the USB 5V power circuit 111.

The AUX JACK connection detection circuit 122 is a circuit that detects whether the AUX 3.5Φ STEREO JACK 123 is connected, and transmits it to the voltage detection circuit 1 113 of H/UNIT using the USB 5V power (PULL UP). . The AUX JACK connection detection circuit 122 outputs a 5V voltage when the JACK is connected, and outputs a 0V voltage when not connected.

AUX 3.5Φ STEREO SOCKET (123) is a SOCKET that connects an external device that plays ANALOG AUDIO signals, and is composed of ANALOG LEFT, ANALOG RIGHT, and GND.

However, by determining the 0V voltage output when the AUX 3.5Φ STEREO JACK 123 is not connected, it cannot be determined whether the cable between the multimedia terminal 120 and the H/UNIT 110 is normally connected. This is because 0V is output even when the cable is not connected.

Therefore, in the present invention, it is determined whether a cable is connected between the H/UNIT 110 and the multimedia terminal 120 by adding the power supply circuit 117 and the voltage detection circuit 2 116 to the H/UNIT 110.

The power supply circuit 117 turns off the 5V USB power supply circuit 111 through the MCU 112 and then 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 a cable is connected between the H/UNIT 110 and the multimedia terminal 120.

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

3 is a first cable connection configuration between the third connector 125 and the USB A-TYPE socket 121 at the multimedia terminal 120 and the second cable between the fourth connector 126 and the AUX 3.5Φ STEREO SOCKET 123 It shows the connection configuration, and also shows the configuration of connecting the USB_5V line and the AUX_DET line using a resistor among the first cable connection configuration and the second cable connection configuration.

The detailed cable configuration is shown in Table 1 below.

Signal name Explanation Remark USB 5V Power 5V for USB MEDIA operation and charging 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 connected AUX SIGNAL CABLE AUX_GND AUXILITY ground AUX SIGNAL CABLE

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

5 is a flowchart illustrating an automated diagnosis process of whether a multimedia terminal is fastened according to an embodiment of the present invention. The following description refers to FIGS. 1 to 5.

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

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

Thereafter, the diagnostic system 100 applies DC or AC power to 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.

Thereafter, the diagnostic system 100 determines whether the cable between the multimedia terminal 120 and the AUDIO and AVN H/UNIT 110 is normally fastened through the power detection circuit of FIG. 2 (S120 and S125).

When power is not detected by the power detection circuit, the diagnostic system 100 propagates the cable unfastened state through the display of the AUDIO, AVN H/UNIT 110, sound, or communication with other devices (S135, S140). .

On the other hand, when the power is normally detected by the power detection circuit, the diagnostic system 100 is AUDIO. The normal connection state of the cable is propagated through the display of the AVN H/UNIT 110, sound, or communication with other devices (S130, S140). That is, the diagnosis system 100 transmits an automated diagnosis result through a vehicle network as well as a notification through the display device of the H/UNIT 110 or sound generation.

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

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

According to the present invention described above, it is possible to prevent rework due to poor work in advance by adding an automated diagnosis in the car kit module and the vehicle assembly line. In addition, according to the present invention, it becomes possible to reduce the production cost due to the reduction of defects.

One embodiment of the present invention has been described above with reference to FIGS. 1 to 5. Hereinafter, preferred embodiments of the present invention that can be conceived from such one embodiment will be described.

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

According to FIG. 6, the terminal fastening diagnosis apparatus 600 of the AVN system includes a power discharge unit 610, a power applying unit 620, a terminal fastening state determination unit 630, a power supply unit 640, and a main control unit 650. Include.

The power supply unit 640 performs a function of supplying power to each component constituting the terminal fastening diagnosis apparatus 600. The main control unit 650 performs a function of controlling the entire operation of each component constituting the terminal fastening diagnosis device 600. Considering that the terminal fastening diagnostic device 600 can be controlled by the ECU of the vehicle, the power supply unit 640 and the main control unit 650 may not be provided in this embodiment.

The power discharge unit 610 performs a function of discharging power applied to the multimedia terminal unit for outputting an audio signal in the AVN system.

The power applying unit 620 performs a function of applying power to the multimedia terminal unit in a state in which the first external output terminal of the multimedia terminal unit and the second external output terminal are interconnected.

The power applying 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 in a state in which the first external output terminal and the second external output terminal are interconnected using a resistor.

The power discharging unit 610 discharges power using USB power connected to a line connecting the control unit controlling the AVN system and the multimedia terminal unit, and the power applying unit 620 is a DC power or AC power supply connected to the line. Power can be applied by using. In the above, the control unit is the same concept as AVN H/U.

The terminal connection state determination unit 630 performs a function of determining the connection state of a terminal in the AVN system based on the voltage detected from the multimedia terminal unit.

Meanwhile, the terminal fastening diagnosis apparatus 600 may further include a fastening state output unit 660.

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

Next, a method of operating the terminal connection diagnostic device of the AVN system will be described.

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

Thereafter, the power supply unit 620 applies power to the multimedia terminal unit in a state in which the first external output terminal and the second external output terminal of the multimedia terminal unit are interconnected.

Thereafter, 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, after that, the fastening state output unit 660 may audio-visually output the fastening state of the multimedia terminal in the AVN system.

Even if all the components constituting the embodiments of the present invention described above are described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all the constituent elements may be selectively combined and operated in one or more. In addition, although all of the components can be implemented as one independent hardware, a program module that performs some or all functions combined in one or more hardware by selectively combining some or all of the components. It may be implemented as a computer program having In addition, such a computer program is stored in a computer readable media such as a USB memory, a CD disk, a flash memory, etc., and is read and executed by a computer, thereby implementing an embodiment of the present invention. The computer program recording medium may include a magnetic recording medium, an optical recording medium, and a carrier wave medium.

In addition, all terms, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art, unless otherwise defined in the detailed description. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention belongs can make various modifications, changes, and substitutions within the scope not departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, 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 interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (7)

A power discharge unit for discharging power applied to the multimedia terminal unit for outputting an audio signal in the AVN system;
A power applying unit for applying the power to the multimedia terminal unit in a state in which the first external output terminal and the second external output terminal of the multimedia terminal unit are interconnected; And
A terminal connection state determination unit for determining a connection state of a terminal in the AVN system based on a voltage detected from the multimedia terminal unit,
The power applying unit uses a USB terminal as the first external output terminal and an external speaker connection terminal as the second external output terminal,
The power supply unit applies the power in a state in which the first external output terminal and the second external output terminal are interconnected using a resistor. delete delete The method of claim 1,
The power discharge unit discharges the power using a USB power connected to a line connecting the control unit for controlling the AVN system and the multimedia terminal unit,
The power supply unit applies the power using DC power or AC power connected to the line. The method of claim 1,
A fastening status output unit that outputs the fastening status audiovisual
Terminal fastening diagnostic device of the AVN system, characterized in that it further comprises. Discharging power applied to a multimedia terminal for outputting an audio signal in the AVN system;
Applying the power to the multimedia terminal in a state in which the first external output terminal and the second external output terminal of the multimedia terminal are interconnected; And
Including the step of determining the fastening state of the multimedia terminal in the AVN system based on the voltage detected from the multimedia terminal,
In the applying of the power, a USB terminal is used as the first external output terminal and an external speaker connection terminal is used as the second external output terminal,
The step of applying the power includes applying the power in a state in which the first external output terminal and the second external output terminal are interconnected using a resistor. delete

Images