KR102676505B1 - Diagnostic information transmitting apparatus and method for detecting pinmap of OBD connector - Google Patents

Abstract

The present invention relates to a diagnostic information transmission device and method having a pin map detection function of an OBD connector.
In addition, the present invention is a diagnostic information transmission device that receives diagnostic information from an OBD (On Board Diagnostics) connector provided in a vehicle and provides it to a user terminal. By inspecting the signal and detecting the pin map, connecting the communication module corresponding to each pin of the OBD connector based on the detected pin map, and providing a control unit that receives diagnostic information through the connected communication module and transmits it to the user terminal, a separate It is possible to communicate with the vehicle and perform vehicle diagnosis and system monitoring without the need for pin map information.

Description

Diagnostic information transmitting apparatus and method for detecting pinmap of OBD connector {Diagnostic information transmitting apparatus and method for detecting pinmap of OBD connector}

The present invention relates to a diagnostic information transmission device and method having a pin map detection function of an OBD connector.

Generally, automobiles are equipped with an OBD (On Board Diagnostics) connector as an external connector for diagnostic communication of the vehicle, and the vehicle can be diagnosed, system monitored, etc. by communicating with the vehicle through this OBD connector.

These OBD connectors are manufactured and used in different shapes for each automobile manufacturer, but have recently been manufactured in the same shape with 16 pins (PIN) according to standards established.

However, although all automobile manufacturers use OBD connectors of the same shape, only the external appearance is the same, and there is a problem in that the positions and orders of communication pins, power pins, and output pins provided in the OBD connector are different.

For this reason, you must have the pin map information of the OBD connector provided by the automobile manufacturer or vehicle to accurately determine the order or location of the communication pins, power pins, and output pins. If you do not have the pin map information of the OBD connector, use the OBD connector. This difficulty causes problems in vehicle diagnosis and system monitoring.

The present invention was conceived in consideration of the above problems, and its purpose is to provide a diagnostic information transmission device and method having a pin map detection function of the OBD connector that can automatically detect the pin map of the OBD connector mounted on a vehicle. there is.

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

The present invention to achieve the above object is a diagnostic information transmission device that receives diagnostic information from an OBD (On Board Diagnostics) connector provided in a vehicle and provides it to a user terminal, comprising: a communication circuit unit including a plurality of communication modules; and detecting the pin map by inspecting the signal input from each pin of the OBD connector, connecting the communication module corresponding to each pin of the OBD connector based on the detected pin map, and receiving diagnostic information through the connected communication module to the user terminal. A diagnostic information transmitting device having a pin map detection function of an OBD connector including a control unit for transmitting to the.

In a preferred embodiment, when a signal is input from the OBD connector, the control unit identifies the type of each pin based on a predefined voltage or pulse and detects a pin map by mapping the order and type of each pin.

In a preferred embodiment, the control unit identifies a pin for which a voltage or pulse defined for each communication module is confirmed as a communication pin, and determines the type of communication module to be connected to the communication pin based on the range of the confirmed voltage or pulse. Identify.

In a preferred embodiment, the control unit checks the voltage corresponding to the power pin and identifies a pin with no voltage change as the power pin when the vehicle's key switch is turned on and off.

In a preferred embodiment, the control unit checks the voltage corresponding to the input pin and identifies the pin where a voltage change occurs when power is applied to the vehicle or a voltage change occurs when connected to ground as the input pin.

In a preferred embodiment, the control unit determines the voltage corresponding to the output pin and identifies the pin where the voltage change occurs when the key switch of the vehicle is turned on and off as the output pin.

In a preferred embodiment, the control unit detects a voltage corresponding to a ground pin and identifies the pin maintaining the ground voltage when power is applied to the vehicle as the ground pin.

In a preferred embodiment, it further includes a mux circuit unit that selectively connects each pin of the OBD connector to the communication module of the communication circuit unit.

In a preferred embodiment, the communication circuit unit and the mux circuit unit are provided in plural numbers to correspond to the number of pins of the OBD connector.

In a preferred embodiment, the mux circuit unit is provided with a plurality of switches, the input terminal of the plurality of switches is commonly connected to one pin of the OBD connector, and the output terminal is separated from each other and connected to the communication modules of the communication circuit unit. Each is connected.

In addition, the present invention is a diagnostic information transmission method performed in a diagnostic information transmission device having a pin map detection function of an OBD connector, wherein the control unit of the diagnostic information transmission device transmits signals input from each pin of the OBD (On Board Diagnostics) connector. A detection step of inspecting and detecting the pin map of the OBD connector; A connection step of connecting communication modules corresponding to each pin based on the detected pin map; and a communication step of receiving diagnostic information through a connected communication module and transmitting the received diagnostic information to a user terminal.

In a preferred embodiment, the detection step includes: identifying the type of each pin based on a predefined voltage or pulse when a signal is input from the OBD connector; and detecting a pin map by mapping the order and type of each pin.

By means of the above-mentioned problem solving means, the present invention can automatically detect the pin map of the OBD connector and connect the communication module corresponding to each pin of the OBD connector based on the detected pin map, so that the vehicle can be connected without the need for separate pin map information. It has the effect of enabling vehicle diagnosis, system monitoring, etc. by communicating with the system.

1 is a diagram illustrating a diagnostic information transmission device having a pin map detection function of an OBD connector according to an embodiment of the present invention.
Figure 2 is a diagram illustrating the circuit structure of a diagnostic information transmission device having a pin map detection function of an OBD connector according to an embodiment of the present invention.
Figure 3 is a diagram for explaining a method of transmitting diagnostic information according to an embodiment of the present invention.

In the following description, specific details of the present invention are set forth to provide a general understanding of the present invention; however, it is known to those skilled in the art that the present invention can be readily practiced without these specific details and with modifications thereof. It will be self-evident to those who have it.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying FIGS. 1 to 3, focusing on the parts necessary to understand the operation and action according to the present invention.

1 is a diagram illustrating a diagnostic information transmission device having a pin map detection function of an OBD connector according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a diagnostic information transmission device having a pin map detection function of an OBD connector according to an embodiment of the present invention. This is a diagram explaining the circuit structure of the information transmission device.

Referring to Figures 1 and 2, the diagnostic information transmission device 100 having a pin map detection function of the OBD connector according to an embodiment of the present invention includes a communication circuit unit 110, a mux circuit unit 120, and a control unit 130. It consists of:

Here, the diagnostic information transmission device 100, which has a pin map detection function of the OBD connector according to an embodiment of the present invention, is connected to the OBD (On Board Diagnostics) connector provided in the vehicle to receive diagnostic information and transmit the received diagnostic information to the user. It can be used to provide information to the terminal 10, and may further include a transceiver 140 that communicates with the user terminal 10 and transmits diagnostic information.

Meanwhile, the diagnostic information transmission device 100 having a pin map detection function of the OBD connector according to an embodiment of the present invention is provided with a plurality of terminals 20 for electrical connection with the OBD connector, which are the pins of the OBD connector. It can be formed into 16 to correspond to the number.

The diagnostic information transmission device 100, which has a pin map detection function of the OBD connector according to an embodiment of the present invention, automatically detects the pin map of the OBD connector when connected to the OBD connector, and uses an internal communication module according to the detected pin map. It is equipped to connect, and through this, vehicle diagnosis, system monitoring, etc. can be performed.

The communication circuit unit 110 has a plurality of communication modules for communication with the OBD connector, receives diagnostic information, outputs it to the control unit 130, and outputs signals input from each pin of the OBD connector to the control unit 130. It can perform the function:

In addition, the communication circuit unit 110 can transmit control commands or signals received from the control unit 130 to the OBD connector, and may be provided in plural pieces to correspond to the number of pins of the OBD connector.

This communication circuit unit 110 includes a MUX control line 111, an Analog-Digital Converter (ADC) module 112, a digital input line 113, and a CAN (Controller Area Network) communication module. (114, 115), LIN (Local Interconnect Network) communication module 116, and K-LINE (K-LINE) communication module 117.

The MUX control line 111 outputs the control command input from the control unit 130 to the MUX circuit unit 120. At this time, the above-described control command may be a command for turning on and off the switch 121 provided in the mux circuit unit 120.

The ADC module 112 converts the analog signal input from each pin of the OBD connector into a digital signal and outputs it to the control unit 130.

In the ADC module 112, the power pin, ground pin, and empty pin may be connected after pin map detection is completed.

The digital input line 113 is for transmitting and receiving digital signals, and the input pin and output pin of the OBD connector can be connected.

The CAN communication modules 114 and 115 are for receiving CAN communication-based diagnostic information and outputting it to the control unit 130. The CAN1 communication module 114 has a relatively high speed depending on the communication speed, and the CAN1 communication module 114 has a relatively high speed. It can be divided into a low CAN2 communication module 115.

Additionally, two channels divided into high and low may be formed in the CAN1 communication module 114 and CAN2 communication module 115, respectively.

The LIN communication module 116 receives diagnostic information based on LIN communication through a data line and outputs it to the control unit 130, and the K-line communication module 117 diagnoses based on K-LINE communication. It may be equipped to receive information and output it to the control unit 130.

In addition, various communication modules used for vehicle network purposes may be further provided.

On the other hand, instead of providing a plurality of communication circuit units 110, only one communication circuit unit 110 may be provided, or an arbitrary number relatively smaller than the number of pins of the OBD connector may be provided.

The mux circuit unit 120 selectively connects each pin of the OBD connector to the communication module of the communication circuit unit 110, and may be configured to include a plurality of switches 121.

The mux circuit unit 120 may be provided in plural numbers to correspond to the number of pins of the OBD connector and may be formed in a structure that connects each terminal 20 and each communication circuit unit 110.

In addition, the plurality of switches 121 are turned on and off under the control of the control unit 130, and the input terminal is commonly connected to one pin of the OBD connector, and the output terminal is separated from each other and is connected to the ADC provided in the communication circuit unit 110. It may be formed in a structure connected to the module 112, the digital input line 113, the CAN communication modules 114 and 115, the LIN communication module 116, and the K-line communication module 117, respectively.

The control unit 130 detects a pin map by examining the signal input from each pin of the OBD connector, connects a communication module corresponding to each pin of the OBD connector based on the detected pin map, and provides diagnostic information through the connected communication module. It performs the function of receiving and transmitting to the user terminal 10.

The control unit 130 transmits a control command to the MUX circuit unit 120 through the MUX control line 111, controls the switch 121 connected to the ADC module 112 to turn on, and turns on the switch 121 connected to the ADC module 112. You can inspect the input signal.

Additionally, when a signal is input from the OBD connector, the control unit 130 can identify the type of each pin based on a predefined voltage or pulse.

In particular, the control unit 130 identifies the pin where the voltage or pulse defined for each communication module is confirmed as a communication pin, and can identify the type of communication module to be connected to the communication pin based on the range of the confirmed voltage or pulse. there is.

For this purpose, the voltage and pulse for identification of the communication module may be defined and stored in advance in the control unit 130, as shown in Table 1 below.

voltage (or pulse) K-LINE
Message response? Communication module type 2.5V or higher 3.5V or less - High Speed CAN H 1.5V or more 2.5V or less - High Speed CAN L Above 0V 3.6V or less - Low Speed CAN H 1.4V or higher 5V or less - Low Speed CAN L 10V or more No LIN 10V or more Yes K-line

That is, the control unit 130 can identify that the pin through which a signal of 2.5V to 3.5V is input is connected to the high channel of the CAN1 communication module 114 as a communication pin, and that the signal of 1.5V to 2.5V is connected to the high channel of the CAN1 communication module 114. It can be identified that the input pin is a communication pin and is connected to the low channel of the CAN1 communication module 114.

In addition, the control unit 130 connects the pin to which a signal of 0V to 3.6V is inputted as a communication pin to the high channel of the CAN2 communication module 115, and the pin to which a signal of 1.4V to 5V is input serves as a communication pin and is connected to the high channel of the CAN2 communication module 115. It can be identified that it is connected to the low channel of the module 115.

In addition, the control unit 130 is connected to the LIN communication module 116 as a communication pin when a signal of 10V or more is input and there is no response to the K-line message, and when a signal of 10V or more is input, a pin that does not respond to the K-line message is connected to the control unit 130. It can be identified that this identified pin is connected to the K-line communication module 117 as a communication pin.

Additionally, the control unit 130 may store predefined voltages and pulses for identification of power pins, output pins, and ground pins, as shown in Table 2 below.

voltage value key switch
On and off
Voltage change? When powering on
Voltage change? When connected to ground
Voltage change? pin type 10V or more Yes - - power pin 0.5V or less - Yes - input pin
(High Side) 10V or more - - Yes input pin
(Low Side) 0.5V or less Yes - - output pin
(High Side) 10V or more Yes - - output pin
(Low Side) +0.5V or less - No - ground pin

That is, the control unit 130 can identify a pin with no voltage change as a power pin when a voltage of 10 V or more corresponding to the power pin is confirmed and the vehicle key switch 121 is turned on or off.

In addition, the control unit 130 confirms a voltage of 0.5V or less corresponding to the input pin, identifies the pin where the voltage change occurs when power is applied to the vehicle as a high side input pin, and confirms a voltage of 10V or more. The pin where the voltage change occurs when connected to ground can be identified as the low side input pin.

In addition, the control unit 130 identifies the pin where the voltage change occurs when a voltage of 0.5V or less corresponding to the output pin is confirmed and the vehicle key switch 121 is turned on and off as the high-side output pin, and the pin where the voltage change occurs is 10V or more. As the voltage is confirmed, the pin where the voltage change occurs when the vehicle key switch 121 is turned on and off can be identified as the low-side output pin.

Additionally, the control unit 130 may identify the pin that maintains the ground voltage when power is applied to the vehicle as the ground pin by confirming that the voltage corresponding to the ground pin is 0.5 V or less.

In addition, the control unit 130 may identify pins that do not belong to communication pins, power pins, input pins, output pins, and ground pins among pins through which signals are input as unused empty pins.

Meanwhile, when all types of pins through which signals are input are identified, the control unit 130 detects a pin map by mapping the order and type of each pin, and based on the detected pin map, the communication module corresponding to each pin of the OBD connector can be connected.

At this time, the control unit 130 sets the pin number and pin type according to the order of each pin, and maps which of the ADC module 112, digital input line 113, and communication module to connect depending on the pin type. A pin map can be detected by collecting information.

Then, the control unit 130 controls the switch 121 of the mux circuit unit 120 to connect the communication pins to the identified communication modules based on the voltage range or pulse range, respectively, and connect the power pin, ground pin, and empty pin. is connected to the ADC module 112, and the input pin and output pin can be connected to the digital input line 113.

For example, as shown in FIG. 2, the control unit 130 has pin number 1 connected to the LIN communication module 116 as a communication pin, and pin number 16 as a communication pin connected to the K-line communication module 117. When the pin map is detected, the mux circuit unit 120 corresponding to pin 1 turns on the switch 121a connected to the LIN communication module 116, connects pin 1 and the LIN communication module 116, and connects pin 16 to pin 16. The corresponding mux circuit unit 120 can connect pin 16 and the K-line communication module 117 by turning on the switch 121b connected to the K-line communication module 117.

This process is performed at least once for each pin formed in the OBD connector, and may be repeated multiple times if an error occurs.

And, when the communication module corresponding to each pin of the OBD connector is connected, the control unit 130 can receive diagnostic information through the connected communication module and transmit it to the user terminal 10.

The transceiver unit 140 is for communication with the user terminal 10 and may include one or more components that enable data transmission and reception, including UART (Universal Asynchronous Receiver Transmitter) communication.

In addition, the transceiver 140 transmits the pin map information detected by the control unit 130 and the diagnostic information received by the control unit 130 to the user terminal 10 so that the user can check it, and the user terminal 10 ) may receive a signal or control command and transmit it to the control unit 130 or to the OBD connector.

Below, a method of transmitting diagnostic information performed in the diagnostic information transmitting device 100 having a pin map detection function of an OBD connector according to an embodiment of the present invention will be described.

Figure 3 is a diagram for explaining a method of transmitting diagnostic information according to an embodiment of the present invention.

However, since all functions performed in the diagnostic information transmission method shown in FIG. 3 are performed in the diagnostic information transmission device 100 having a pin map detection function of the OBD connector described with reference to FIGS. 1 and 2, even without explicit explanation, , all functions described with reference to FIGS. 1 and 2 are performed in the diagnostic information transmission method according to the preferred embodiment of the present invention, and all functions described with reference to FIG. 3 are performed in the OBD connector according to the preferred embodiment of the present invention. It should be noted that this is performed as is in the diagnostic information transmission device 100 having a pin map detection function.

Referring to FIG. 3, the control unit 130 of the diagnostic information transmission device 100 having a pin map detection function of the OBD connector first receives signals input from each pin of the OBD connector (S110).

In step S110, the control unit 130 transmits a control command to the MUX circuit unit 120 through the MUX control line 111, controls the switch 121 connected to the ADC module 112 to turn on, and turns on the ADC module 112. You can receive signals through .

Next, when a signal is input from the OBD connector, the control unit 130 identifies the type of each pin based on a predefined voltage or pulse (S210).

At this time, the control unit 130 identifies the pin where the voltage or pulse defined for each communication module is confirmed as the communication pin, and identifies the type of communication module to be connected to the communication pin based on the range of the confirmed voltage or pulse ( S220).

In step S220, the control unit 130 is connected to the high channel of the CAN1 communication module 114 as a communication pin for the pin to which a signal of 2.5V to 3.5V is input, and the pin to which a signal of 1.5V to 2.5V is input is connected to the high channel of the CAN1 communication module 114. It can be identified that as a communication pin, it is connected to the low channel of the CAN1 communication module 114.

In step S220, the control unit 130 connects the pin to which a signal of 0V to 3.6V is input to the high channel of the CAN2 communication module 115 as a communication pin, and the pin to which a signal of 1.4V to 5V is input serves as a communication pin. It can be identified that it is connected to the low channel of the CAN2 communication module 115.

In step S220, when a signal of 10V or more is input, the control unit 130 connects a pin that does not respond to the K-line message to the LIN communication module 116 as a communication pin, and when a signal of 10V or more is input, the pin that does not respond to the K-line message is connected to the K-line message. It can be identified that the pin for which the response has been confirmed is a communication pin and is connected to the K-line communication module 117.

Next, the control unit 130 identifies the power pin based on a predefined voltage and pulse to identify the power pin (S230).

In step S230, the control unit 130 confirms a voltage of 10V or more corresponding to the power pin and identifies a pin with no voltage change as the power pin when the vehicle key switch 121 is turned on and off.

Next, the control unit 130 identifies the input pin and the output pin based on a predefined voltage and pulse to identify the input pin and the output pin, respectively (S240).

In step S240, the control unit 130 identifies a voltage of 0.5V or less corresponding to the input pin, and if a voltage change occurs when power is applied to the vehicle, it is identified as a high side input pin, and a voltage of 10V or more is confirmed. And if a voltage change occurs when connected to ground, it can be identified as a low side input pin.

In step S240, the control unit 130 identifies a voltage of 0.5V or less corresponding to the output pin and identifies it as a high-side output pin if a voltage change occurs when the vehicle's key switch 121 is turned on and off. If the voltage is confirmed and a voltage change occurs when the vehicle's key switch 121 is turned on and off, it can be identified as a low-side output pin.

Next, the control unit 130 identifies the ground pin based on a predefined voltage and pulse to identify the ground pin (S250).

In step S250, the control unit 130 can identify a ground pin as a ground pin if a voltage of 0.5 V or less corresponding to the ground pin is confirmed and the ground voltage is maintained when power is applied to the vehicle.

Next, the control unit 130 determines which empty pins are not in use (S260).

In step S260, the control unit 130 may determine that among the pins through which signals are input, pins that do not belong to the communication pin, power pin, input pin, output pin, and ground pin are empty pins.

Next, the control unit 130 detects a pin map by mapping the order and type of each pin (S310).

In step S310, the control unit 130 sets the pin number and pin type according to the order of each pin, and which of the ADC module 112, digital input line 113, and communication module should be connected depending on the pin type. The pin map can be detected by collecting the mapped information.

Next, the control unit 130 connects the communication module corresponding to each pin of the OBD connector based on the pin map (S410).

In step S410, the control unit 130 controls the switch 121 of the mux circuit unit 120 to connect the communication pins to the identified communication modules based on the voltage range or pulse range, respectively, and the power pin and ground pin. and empty pins can be connected to the ADC module 112, and the input pins and output pins can be connected to the digital input line 113.

Next, when the communication module corresponding to each pin of the OBD connector is connected, the control unit 130 receives diagnostic information through the connected communication module and transmits it to the user terminal 10 (S510).

In step S510, the control unit 130 may transmit pin map information and diagnostic information to the user terminal 10 through the transceiver 140, and signals received from the user terminal 10 to the transceiver 140. I can also receive control commands.

In the above, preferred embodiments of the present invention have been described by way of example, but the scope of the present invention is not limited to these specific embodiments, and may be appropriately modified within the scope stated in the claims.

100: Diagnostic information transmission device
110: Communication circuit unit 111: Mux control line
112: ADC module 113: digital input line
114: CAN1 communication module 115: CAN2 communication module
116: LIN communication module 117: K-line communication module
120: Mux circuit unit 121: Switch
130: control unit
140: Transmitter and receiver

Claims (12)

A diagnostic information transmission device that receives diagnostic information from the OBD (On Board Diagnostics) connector provided in the vehicle and provides it to the user terminal,
A communication circuit unit including a plurality of communication modules;
Detects the pin map by examining the signal input from each pin of the OBD connector, connects the communication module corresponding to each pin of the OBD connector based on the detected pin map, and receives diagnostic information through the connected communication module and sends it to the user terminal. a control unit that transmits; and
It includes a mux circuit unit that selectively connects each pin of the OBD connector and the communication module of the communication circuit unit,
The control unit,
When a signal is input from the OBD connector, the type of each pin is identified based on a predefined voltage or pulse, and the pin map is detected by mapping the order and type of each pin.
The voltage corresponding to the power pin is confirmed, and the pin with no voltage change when the vehicle's key switch is turned on and off is identified as the power pin.
The voltage corresponding to the input pin is confirmed, and the pin where a voltage change occurs when power is applied to the vehicle or when connected to ground is identified as an input pin.
The voltage corresponding to the output pin is confirmed, and the pin where the voltage change occurs when the vehicle's key switch is turned on and off is identified as the output pin.
The voltage corresponding to the ground pin is detected, and the pin that maintains the ground voltage when power is applied to the vehicle is identified as the ground pin,
The communication circuit unit and the mux circuit unit,
It is provided in plural pieces to correspond to the number of pins of the OBD connector.
The mux circuit part,
Pin map detection of the OBD connector, comprising a plurality of switches, wherein the input terminal of the plurality of switches is commonly connected to one pin of the OBD connector, and the output terminal is separated from each other and connected to communication modules of the communication circuit unit, respectively. A diagnostic information transmission device with a function.
delete According to claim 1,
The control unit,
A pin map of the OBD connector, characterized in that the pin where the voltage or pulse defined for each communication module is confirmed is identified as a communication pin, but the type of communication module to be connected to the communication pin is identified based on the range of the confirmed voltage or pulse. A diagnostic information transmission device with a detection function.
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