KR20030069520A - Diagnostic system for automobile by wireless communication module and diagnosis method using the same - Google Patents

Abstract

PURPOSE: A vehicle diagnosing system and a diagnosing method by using the same are provided to diagnose self-diagnosing data transmitted into a diagnosing data analyzing device through a wireless communication device and to reproduce a self-diagnosing code by recognizing protocol of each electronic control unit. CONSTITUTION: A vehicle diagnosing system includes a self-diagnosing device(30), a wireless communication transmitting module, and a diagnosing data analyzer(50). The self-diagnosing device(30) scans a communication protocol of electronic control units(10a,10b,10n) and produces a self-diagnosing code by using the communication protocol. The self-diagnosing device(30) is connected to a connector(20) coupled with at least one electronic control unit. The wireless communication transmitting module transmits the self-diagnosing code to an external local wireless communication receiving device. The diagnosing data analyzer(50) has a wireless communication receiving module(51) so as to receive the self-diagnosing code.

Description

Diagnostic system for automobile by wireless communication module and diagnosis method using the same}

The present invention generates a self-diagnosis code in a mode recognizable by a driver by recognizing a protocol of each electronic control unit in a vehicle having at least one electronic control unit (ECU), and using the generated self-diagnosis code through a short range wireless communication means. The present invention relates to a vehicle diagnostic system using a wireless communication module capable of transmitting to a diagnostic data analyzing apparatus, analyzing the transmitted self-diagnostic data, and outputting a result, and a diagnostic method using the same.

Most automobiles currently on the market include: an engine ECU (Engine ECU) for receiving detection signals from various sensors and controlling the operation of the engine based on the detection signals; A / TM ECU (Automatic Transmission ECU) for controlling the operation of the automatic transmission; There are many electronic control units (ECUs) such as anti-lock break system (ABS) ECUs that control the operation of the brakes. Each of the plurality of electronic control units (ECU) as described above has a self diagnosis function using a micro computer, and thus detects a state of a function of a device to be diagnosed and then corresponds to a diagnosis. The code is stored in the internal memory, and the diagnostic code stored in the electronic control unit (ECU) is output to the outside by various methods. At this time, the electronic control unit (ECU) outputs a diagnostic code according to a certain protocol (for example, DTC code system), and for this purpose, the diagnostic code system is stored in a predetermined storage medium and then outputs a predetermined diagnostic code based on the diagnostic code system. Will be stored in its own memory.

Automotive diagnostic devices belong to the power / wire harness diagnosis, and are generally classified into on board diagnosis I and off board diagnosis II.

On-board Diagnosis continuously diagnoses the abnormality of the device to be diagnosed in the ECU, and if any abnormality occurs, it operates the backup or fail safe function, processes it, and codes the data of the failure to provide itself. The offboard diagnosis system is a fault diagnosis device installed in a repair shop or a service shop that reads out the diagnosis code stored in the onboard diagnosis and outputs maintenance instructions. It is a device that makes it easy to diagnose and repair a vehicle by continuously and automatically diagnosing the status of a diagnosis target device.

Such a conventional vehicle diagnostic apparatus has a problem in that it is possible to read the diagnostic code value only by connecting an offboard diagnosis system installed at a service factory with an abnormality of the vehicle detected by the onboard diagnosis. In other words, the onboard diagnosis and the offboard diagnosis are separated from each other, so it is impossible to know whether the car is abnormal until the driver visits the service factory and decodes the diagnosing code. There was a problem that can not be done. In addition, it is not possible to take prompt measures for various abnormalities occurring during driving, and must visit a repair shop, and a measurement device provided at the repair shop has a problem in that it is not possible to accurately identify a failure symptom of a car generated while driving.

In addition, by using a self-diagnostic device that is portable to the output of the self-diagnosis output device connected to the vehicle, the device enables the light bulb and the buzzer to operate simultaneously according to the trouble code signal corresponding to the broken part so that the failure code can be detected in the car. Has been developed, but there is a problem that increases the inconvenience of use because the diagnostic code for each manufacturer is displayed differently for the same system and the same diagnostic output.

When the GPS receiver and the wireless communication device are installed in the car to transmit the state of the car to the control station through the wireless communication device, the control station makes a database of the state of the car transmitted through the wireless communication device and manages the database. When it is determined that a problem has occurred, a remote diagnosis device has been developed to notify the driver and to perform the corresponding processing operation. However, the remote diagnosis device has a problem that the device is complicated and expensive because the GPS receiver and the wireless communication device must be installed. In addition, the remote diagnosis device has a problem that the driver can not know the diagnostic information directly, and must know the diagnostic information only through the car repair shop.

The present invention has been made to solve such a conventional problem, the object is to recognize the protocol of each electronic control unit in a vehicle having at least one electronic control unit (ECU) self-diagnosis of the mode that the driver can recognize A vehicle diagnosis system using a wireless communication module that generates a code, transmits the generated self-diagnosis code to a diagnostic data analysis apparatus through a short range wireless communication means, analyzes the transmitted self-diagnostic data, and outputs a result, and To provide a diagnostic method used.

1 is a block diagram of a vehicle diagnostic system using a wireless communication module according to the present invention.

2 is a block diagram showing the structure of a self-diagnosis apparatus according to an embodiment of the present invention.

3 is a flowchart illustrating a process of automatically checking a communication protocol for an electronic control unit (ECU) according to an embodiment of the present invention regardless of the type of vehicle.

4 is a block diagram showing the structure of a diagnostic data display apparatus according to an embodiment of the present invention.

Figure 5 is a block diagram showing the structure of a diagnostic data analysis apparatus according to an embodiment of the present invention.

6 is a flowchart illustrating a vehicle diagnosis process using a wireless communication module according to the present invention.

7A is a diagram illustrating a display unit of a diagnostic data display device according to an embodiment of the present invention.

7B is a diagram illustrating a display unit of a diagnostic data display apparatus in a fault state according to an exemplary embodiment of the present invention.

8 is a front view of a diagnostic data analysis apparatus according to an embodiment of the present invention.

9 is a diagram showing a diagnostic analysis output output from the diagnostic data analysis apparatus according to an embodiment of the present invention.

FIG. 10 is a diagram illustrating a vehicle diagnostic system using a wireless communication module according to an embodiment of the present invention. FIG.

The vehicle diagnostic system using the wireless communication module according to the present invention for achieving the above technical problem, transmits the self-diagnostic code generated from the electronic control unit of the vehicle to the diagnostic data analysis apparatus through the short-range wireless communication means, the transmitted diagnosis The present invention relates to a vehicle diagnostic system using a wireless communication module for analyzing a code and outputting a result. More specifically, the vehicle diagnostic system using the wireless communication module according to the present invention, after scanning the communication protocol of the electronic control unit (ECU) irrespective of the type of vehicle, using the identified communication protocol for the diagnosis target device A self-diagnosis device connected to a connector to which at least one electronic control unit (ECU) mounted in a vehicle is coupled to generate a self-diagnosis code in a mode of data value recognizable by a driver through a predetermined terminal; A wireless communication transmission module for transmitting the diagnostic code generated from the self-diagnostic apparatus to an external short range wireless communication receiving device through short range wireless communication; And a diagnostic data analyzing apparatus including a wireless communication receiving module to receive a diagnostic code transmitted through short-range wireless communication and analyze the received diagnostic code.

The self-diagnostic apparatus according to the present invention is connected to a connector to which a plurality of electronic control units (ECUs) mounted on a vehicle are connected and scanned after scanning the communication protocol of the electronic control unit (ECU) regardless of the type of vehicle. In order to output a self-diagnosis code for a device to be diagnosed using a communication protocol in a form that can be recognized by a driver through a predetermined terminal, (a) a connector combined with a plurality of electronic control units (ECU) mounted in an automobile An input / output unit (I / O unit) forming an interface for communication module and code input / output; And (b) scanning each electronic control unit (ECU) connected to the connector through the input / output unit (I / O) in an initialization mode that proceeds after power is first applied to each unit (ECU). A first process of generating the type information of the communication protocol and storing it sequentially in an inactive memory; In the normal use mode after the initialization mode, the communication code of the diagnostic target device is transmitted from the electronic control unit (ECU) by communicating with each electronic control unit (ECU) using the communication protocol information stored in the inactive memory. Second process; And a central processing unit configured to perform a third process of allowing the diagnostic code transmitted from the second process to be transmitted to the wireless communication module through the input / output unit (I / O unit).

In the present invention, the vehicle diagnostic system using the wireless communication module, the LCD screen display unit for displaying in a graphical interface so that the self-diagnostic code transmitted from the self-diagnostic apparatus can be visually confirmed; An alarm light for visually notifying the diagnosis state or an alarm for visually notifying the diagnosis state when the diagnosis code indicates a dangerous state of the device to be diagnosed as a result of the central processing unit determined according to a predetermined criterion; And a keypad unit for transmitting a predetermined command code to the central processing unit.

In the present invention, the diagnostic data display device preferably includes a wireless communication module capable of transmitting a diagnostic code to the diagnostic data analysis device.

In the present invention, the first method for short-range wireless communication between the self-diagnosis device and the diagnostic data analysis device includes an RF interface (Radio Frequency Interface) in each of the devices, so that the interfaces are within a predetermined recognition distance. It is characterized in that the short-range wireless data communication between the devices.

In the present invention, the second method for short-range wireless communication between the self-diagnostic device and the diagnostic data analysis device includes an infrared data association interface (IrDA Interface) in each of the devices, wherein the interfaces are predetermined. If the proximity within the recognition distance is characterized in that the short-range wireless data communication between the devices.

The diagnostic data analysis apparatus may include: a wireless communication module configured to receive a diagnostic request comment and a diagnostic code transmitted from the self-diagnostic apparatus through near field communication; An input / output interface configured to transmit an input signal for controlling an operation of the diagnostic data analysis device or to transmit an analysis result of a diagnostic code to an output device; A memory unit configured to include a diagnostic result analysis program capable of calculating a predetermined diagnostic code-specific analysis result, an inactive memory in which data is stored, and an active memory in which diagnostic code data transmitted by the wireless communication module is temporarily stored; And a first process of temporarily storing the diagnostic code data transmitted from the wireless communication module in the active memory. A second process of calculating a diagnosis result using the stored diagnosis result analysis program and data; And a central processing unit configured to perform a third process of transmitting a diagnostic analysis result to an input / output interface to output the calculated diagnostic analysis result.

In the present invention, it is preferable that the diagnostic data analyzing apparatus further includes printing means for outputting and recognizing the diagnostic analysis result in the form of text and graphics.

In the present invention, it is preferable that the diagnostic data analysis apparatus further includes an external communication interface to transmit the diagnostic analysis result through an external storage medium.

In the present invention, the diagnostic result analysis program of the diagnostic data analysis apparatus calculates an analysis result by storing an analysis result for each code corresponding to the transmitted diagnostic data and outputting an analysis result matched with the code. It is done.

Vehicle diagnostic method using a wireless communication module according to the present invention for achieving the above another technical problem, the diagnostic data in the mode that the driver can recognize the self-diagnosis code output from one or more electronic control unit (ECU) mounted on the vehicle A self diagnostic device to produce; A wireless communication transmission module for transmitting the diagnostic code generated from the self-diagnostic apparatus to an external wireless communication receiving device through short range wireless communication; And a diagnostic data analyzing apparatus including a wireless communication receiving module to receive a diagnostic code transmitted through short-range wireless communication and analyze the received diagnostic code, the method comprising: (a) After scanning the communication protocol of the electronic control unit (ECU) regardless of the type of vehicle by the self-diagnosis device, the self-diagnosis code for the diagnosis target device is generated in a mode of recognizable data value using the identified communication protocol. Making a step; (b) transmitting a diagnostic code generated by the self-diagnostic apparatus to a diagnostic data analyzing apparatus by a wireless communication transmitting module capable of transmitting data by short-range wireless communication; And (c) analyzing the transmitted diagnostic code by an analysis program previously stored in a memory of the diagnostic data analyzing apparatus and outputting the diagnostic result by output means in a form of recognizable text and graphics. It is characterized by.

In the present invention, after the step (a), it is possible to further include (a1) outputting the self-diagnostic code generated by the self-diagnosis apparatus through a predetermined display device.

In the present invention, a method for short-range wireless communication between the self-diagnosis device and the diagnostic data analysis device includes an RF interface (Radio Frequency Interface) in each device, if the interfaces are within a predetermined recognition distance within the device; It is characterized in that the short-range wireless data communication between them.

In the present invention, a method for short-range wireless communication between the self-diagnosis device and the diagnostic data analysis device includes an infrared communication interface (IrDA Interface) (Infrared Data Association Interface) in each device, so that the interfaces have a predetermined recognition distance. If within close proximity to the device characterized in that the short-range wireless data communication between the devices.

In the present invention, the method for outputting an analysis result in the diagnostic data analysis apparatus may further include printing means for outputting and recognizing the diagnostic analysis result in the form of text and graphics.

Hereinafter, the present invention will be described in detail with reference to examples, and in order to help the understanding of the present invention, it will be described in detail with reference to the accompanying drawings. However, embodiments according to the present invention may be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

1 is a block diagram of a vehicle diagnostic system using a wireless communication module according to the present invention.

Referring to FIG. 1, when the device-specific self diagnosis codes calculated from a plurality of electronic control units (ECUs) 10a to 10n mounted on a vehicle are collected through the connector 20 and transmitted to the self diagnosis device 30, The self-diagnosis apparatus 30 examines the protocol applied to each of the electronic control units 10a to 10n, and generates a diagnostic code for each device in a code type mode that can be recognized by the driver regardless of the type of protocol. The generated diagnostic code is transmitted to the diagnostic data analysis device 50 through the short range wireless communication module 43, and the wireless communication module 43 may display a diagnostic code generated from the self diagnostic device 30. It can be included in the data display device 40 and provided. The diagnostic code received by the short range wireless communication module 51 of the diagnostic data analyzing apparatus 50 is analyzed by a diagnostic code analysis program stored in an internal memory, and the analyzed diagnostic result is output by a predetermined output means 56. The output is in a form that the user can recognize.

Hereinafter, the respective devices will be described in more detail. Most vehicles currently on the market include: an engine ECU for receiving detection signals from various sensors and controlling the operation of the engine based on the detection signals; A / TM ECU (Automatic Transmission ECU) for controlling the operation of the automatic transmission; There are many electronic control units (ECUs) such as anti-lock break system (ABS) ECUs that control the operation of the brakes. Each of the plurality of electronic control units (ECU) as described above has a self diagnosis function using a micro computer, and thus detects a state of a function of a device to be diagnosed and then corresponds to a diagnosis. The code is stored in an internal memory, and the diagnostic code stored in the electronic control unit (ECU) 10 is output to the outside by various methods. At this time, the electronic control unit (ECU) 10 outputs a diagnostic code according to a predetermined protocol (for example, a DTC code system), and for this purpose, the diagnostic code system is stored in a predetermined storage medium, and a predetermined diagnostic code is based on this. Will print out and store it in its own memory. Diagnosis collected through the connector 20 connected to the electronic control unit 10 in order to generate the code of the integrated mode that the driver can recognize the diagnostic code for each electronic control unit 10 irrespective of the type of protocol. The code is interpreted by the self-diagnosis apparatus 30 to recognize and interpret the protocol of each electronic control unit 10 to generate a diagnostic code in an integrated mode that can be recognized by the driver.

Referring to FIG. 2, the self-diagnosis apparatus 30 according to an embodiment of the present invention includes a plurality of electronic control units (ECUs) 10 mounted on an automobile. Connected to the connector 20 to scan the communication protocol of the electronic control unit (ECU) 10 irrespective of the type of vehicle, and then generate the self-diagnosis code for the diagnosis target using the identified communication protocol. Device.

More specifically, the self-diagnosis apparatus 30 according to the embodiment of the present invention includes a connector 20 to which a plurality of electronic control units (ECUs) 10 mounted in an automobile are connected, and a diagnostic data display device 40 and a cord. An input / output unit (I / O unit) 30 forming an interface for input / output; A central processing unit 34 that manages the overall process of the vehicle self-diagnosis apparatus 30 according to an embodiment of the present invention; A protocol scanner program, which is a program that performs an automatic verification process for the communication protocol of the electronic control unit (ECU) 10, is included. Data is not lost even when power is not applied, but data can be changed by an electromagnetic method. Flash memory, which is an inactive memory, RAM when data is lost, and RAM which is an active memory temporarily storing work data generated from the central processing unit 34 in the process of implementing the technical idea according to the present invention, and a vehicle. And a memory unit 35 configured to include a ROM, which is an inactive memory in which information such as the type and the type of the data is permanently stored and data is not lost even when power is not applied.

Here, the central processing unit 34 manages the following processes to implement the technical idea according to an embodiment of the present invention. More specifically, the central processing unit 34 is the first when the power is applied to the vehicle self-diagnosis apparatus 30 for the first time through a predetermined power supply unit 37 or when the user requests the progress of the device initialization mode Scans each electronic control unit (ECU) 10 connected to the connector 20 through an input / output unit (I / O unit) 30 to read the type information of the communication protocol for each unit (ECU) 10. Then proceed with a first process to sequentially store in an inactive memory (eg flash memory); In the normal use mode after the initialization mode, the communication codes of the diagnosis targets are corresponded to each other by communicating with each electronic control unit (ECU) 10 using communication protocol information for each electronic control unit (ECU) 10 stored in the inactive memory. Conducting a second process received from an electronic control unit (ECU) 10; The third process allows the diagnostic code transmitted from the second process to be transmitted to the diagnostic data display device 40 through the input / output unit (I / O unit) 33.

The self-diagnosis code is used to compare a predetermined diagnostic system (e.g., P-code system) with a predetermined code system (e.g., P code system) from a sensor value transmitted from a sensor installed in the main part of the vehicle to the unit ECU. It is a code that is generated after judging the state and stored in the memory of the electronic control unit (ECU), and then outputted when a failure state is determined at the vehicle repair station through the connector.

In some cases, the self-diagnosis apparatus 30 according to an embodiment of the present invention receives the analog signal inputted to the input / output unit (I / O unit) 33 through the connector 20 and converts the digital signal into A /. The D conversion unit 36 may further include. In this case, when the analog voltage signal of the battery is input through the connector 20, the A / D converter 36 converts the analog voltage signal into a digital signal and the central processing unit 34 performs a predetermined process. Preferably, the self-diagnostic device 30 is configured to transmit the digitized battery voltage information through the diagnostic data display device 40.

Hereinafter, the self-diagnosis process of the diagnosis target performed by the self-diagnosis apparatus 300 will be described in detail, except that the number of scanning target electronic control units (ECU) 10 is n and the number of communication protocols to be applied. Assumes m (the method of finding any of the applicable electronic control unit (ECU) 10 communication protocols, for example, KWP2000 protocol; ISO9142-2 protocol; Carb protocol, etc.) in the present invention. It is not intended to limit the technical spirit according to the invention, it is only for convenience of description.

More specifically, first, when a communication protocol scanning event for n electronic control units (ECUs) occurs (when power is first applied or when a user requests through a keypad unit), the central processing unit is configured for each of the n units (ECUs). When communication is attempted in a predetermined order using m communication protocols and a response is received from the unit ECU, the central processing unit 34 is a communication protocol of the unit (ECU) that scans the communication protocol applied at the present time. It is determined that. Then, the scanning unit (ECU) identification information (e.g., address information) is matched with the communication protocol type information in an inactive memory (e.g., flash memory) and sequentially stored in the order of the unit (UU) being scanned. In this case, it is preferable that the order of application of the m communication protocols applied in the communication protocol confirmation process for each of the n electronic control units (ECUs) is determined according to the communication protocol order that is widely used for the corresponding units (ECUs). Do.

Referring to FIG. 3, the communication protocol confirmation and the storage process for each electronic control unit (ECU) are described in more detail.

As shown in FIG. 3, the central processing unit 34 first selects the first electronic control unit ECU (step S10) and selects the first protocol according to a predetermined order (step S20). At this time, it is preferable that the order information for applying the communication protocol for each ECU is stored in an inactive memory (for example, a flash memory) of the vehicle self-diagnosis apparatus according to the present invention. Then, the first address among the addresses allocated to the first protocol is selected (step S30) and communication with the first electronic control unit (ECU) is attempted according to the contents selected in steps S10 to S30. As such, when communication is attempted, the central processing unit 34 determines whether the first electronic control unit (ECU) responds (step S50), and branches the process to step S60 or step S70 according to the result. If the first electronic control unit (ECU) responds to the communication using the first address as a result of the determination in step S50, the central processing unit 34 proceeds to step S70 and the first electronic control unit (ECU). ) And the communication protocol type information are matched and stored in the inactive memory (eg, flash memory). However, if it is determined in step S50 that the first electronic control unit (ECU) does not respond when communicating with the first address, it is determined whether the next address is allocated to the first communication protocol (step S60). Therefore, the process branches to S80 or S90. If it is determined in step S60 that there is a next address for the first communication protocol, the process proceeds to step S80 to set the next address, and then the process proceeds to step S40 again to the first protocol using the second address. Based communication is attempted. The communication attempt by the first communication protocol by this address counting continues until the branching condition from step S50 to step S70 is obtained. On the other hand, if it is determined in step S60 that there is no next assigned address in the first communication protocol, it is determined that mutual communication with the first electronic control unit (ECU) is impossible by the first communication protocol, and the process is determined in step S90. The processor determines whether the next communication protocol exists according to a predetermined order, and according to the result, the central processing unit 34 branches the process to steps S100 to S30. If it is determined in step S90 that there is a next communication protocol in a predetermined order, the central processing unit 34 proceeds to step S30 and attempts communication by address counting for the next communication protocol. . The communication attempt with the electronic control unit (ECU) by address counting for each communication protocol continues until the branch condition from the step S50 to the step S70 is satisfied. As a result, there is a response from the communication attempt using the specific address of the specific communication protocol. When the central processing unit 34 proceeds to step S70 and then proceeds to step S100 again, an attempt is made to communicate by address counting for each communication protocol in a predetermined order for the next electronic control unit (ECU). Since the communication protocol confirmation process for the second electronic control unit (ECU) is substantially the same as the technical idea described above, a detailed description thereof will be omitted herein. On the other hand, by applying m communication protocols to a predetermined electronic control unit (ECU) and attempting communication by address counting by performing a series of procedures as shown in FIG. 3, but there is no confirmed communication protocol, the central processing unit In operation S95, error processing is performed to store unit (ECU) information in which the communication protocol is not confirmed, in the memory 35, and to notify the result through the diagnostic data display device 40.

Hereinafter, the diagnostic data display device 40 will be described with reference to FIG.

The diagnostic data display device 40 displays the diagnostic code transmitted from the self-diagnostic device 30 and transmits the diagnostic code to the diagnostic data analysis device 50 through wireless communication means.

More specifically, the diagnostic data display apparatus 40 according to an embodiment of the present invention transmits the diagnostic code transmitted from the self-diagnostic apparatus 30 to the diagnostic data analysis apparatus 50 through short range wireless communication. Module 43; Transmitting the diagnostic code to the output means 46 for transmitting an input signal for controlling the operation of the diagnostic data display device 40 input through the input means 45 or outputting the code in a mode recognizable by the driver. An input / output interface (44); A memory 42 for storing diagnostic code data for transmission via the wireless communication module 43; And a first process of storing the diagnostic code transmitted from the self-diagnostic apparatus 30 in a memory. A second process of displaying the stored diagnostic code through the output means 46 according to a display request of the user through the input means 45; And a central processing unit 41 which performs a third process of transmitting the diagnostic code when the diagnostic data analyzing apparatus 50 including the short range wireless communication receiving module 51 approaches the data communication range.

Herein, the wireless communication module 43 may be implemented as an RF (Radio Frequency) communication module or an infrared communication (IrDA) module for short-range wireless data communication with the diagnostic data analyzing apparatus 50. .

The RF communication module includes an I / C chip composed of a loop antenna (not shown) and a memory (not shown) for data transmission, and is generally used as a traffic card and an access control card in the form of an RF card. When the RF reading unit of the diagnostic data analysis device 50 for data communication with the RF communication module, that is, the RF receiving module approaches the loop antenna within a recognition distance (typically 10 cm), the RF reading unit is an RF transmission module. Communicates at 106kbps.

More specifically, when a diagnostic code is transmitted from the RF transmitting module to the RF receiving module, the RF receiving module delivers a steady RF power source to the RF transmitting module, and the data output turns on / off a transistor of the RF transmitting module. Signaling is performed from the RF transmitting module to the RF receiving module by turning it off to change the impedance of the antenna coil and changing the reflected power.

Meanwhile, when the wireless communication module 43 is implemented as an infrared communication module, an IrDA encoder (not shown) and an infrared light emitting unit (not shown) for infrared transmission should be provided. In addition, in order to receive the diagnostic code transmitted from the infrared light emitting unit, the receiving wireless communication module 51 of the diagnostic data analyzing apparatus 50 includes an infrared light receiving unit (not shown) and an IrDA decoder (not shown). desirable.

7A and 7B show output means 47 and 48 in which a diagnostic code of the diagnostic data display device 40 equipped with the wireless communication module 43 is displayed.

Referring to Figure 7a, it is possible to output the diagnostic code in the form of text and graphics so that the driver can recognize. For example, the diagnostic information such as the engine oil 47a, the fuel filter, the timing belt, the mission oil, and the brake fluid can be checked by selectively outputting a diagnostic code from each electronic control unit (ECU) 10. Also, referring to FIG. 7B, when indicating that the diagnostic code is an emergency, an emergency is indicated in a predetermined portion 48a of the displayed area to enable a quick and proper response to an automobile failure.

Hereinafter, the diagnostic data analyzing apparatus 50 receiving the diagnostic code from the diagnostic data display apparatus 40 through short-range wireless communication will be described with reference to FIG. 5.

The diagnostic data analyzing apparatus 50 may include a wireless communication module 51 for receiving a diagnostic code transmitted through short range wireless communication; An input / output interface 54 for transmitting a signal input through an input means 55 to control an operation of the diagnostic data analyzing apparatus or transmitting an analysis result of a diagnostic code to an output means 56; A memory unit 52 configured to include an inactive memory in which a diagnostic result analysis program capable of calculating a predetermined diagnostic code analysis result and an active memory in which diagnostic code data transmitted by the wireless communication module is temporarily stored; And a first process of temporarily storing the diagnostic code data transmitted from the wireless communication module in the active memory. A second process of calculating a diagnosis result by the stored diagnosis result analysis program; And a central processing unit 53 for performing a third process of transmitting a diagnostic analysis result to an input / output interface to output the calculated diagnostic analysis result.

The wireless communication module 51 receives a diagnostic code transmitted from the diagnostic data display device 40 through short-range wireless communication, and as described above in the wireless communication module 43 in the diagnostic data display device 40. It is preferable to implement it as an RF communication module or an infrared communication module.

When the transmitting side wireless communication module 43 transmits the diagnostic code through the RF interface, the receiving side wireless communication module 51 transmits RF power to the transmitting side wireless communication module 43 as described above with reference to FIG. 4. Receive a diagnostic code by varying the impedance of the antenna.

Meanwhile, when the wireless communication module 51 is implemented as an infrared communication module, an infrared light receiving unit (not shown) and an IrDA decoder (not shown) for receiving infrared data transmitted from the transmitting side wireless communication module 43 are provided. Must be provided.

In addition, after receiving the data through the wireless communication module 51 as necessary, a UART (Universal Asynchronous Receiver / Transmitter) is further provided for the parallel signal processing in the central processing unit 53, the reception Converts the serial signal into a parallel signal.

The result of the diagnostic code analysis by the process of the central processing unit 53 is displayed on a monitor 57 such as a liquid-crystal display (LCD) or output through a print output means such as a printer 58 to diagnose the diagnosis. It can be provided to a driver who is not equipped with the data analysis device 50.

In the method for analyzing a diagnostic code by the process of the central processing unit 53, the analysis result for each code corresponding to the transmitted diagnostic data is output by outputting an analysis result matching the diagnosis code by a pre-stored matching program. Calculate the result. For example, when the diagnostic P-CODE value transmitted from the diagnostic data display device 40 is transmitted with the values '0114' and '0121', an analysis result corresponding to the values '0114' and '0121' stored in the matching program. You can output the analysis result of 'Please check the engine oil'.

8 shows a diagnostic data analysis device 50 equipped with the wireless communication module 51.

Referring to FIG. 8, it is possible to implement the input means 55 by the keypad 55, and output the results through the LCD monitor 57 and the printer 58.

The diagnostic result 59 output through the printer 58 can be configured as shown in FIG.

Referring to FIG. 9, as a diagnosis result of analyzing a diagnosis code, a vehicle model, consumables, failure information (including a diagnosis code), a contact number, and the like may be provided.

Preferably, in implementing a vehicle diagnostic system using a wireless communication module according to the present invention, the self-diagnostic device 30 and the diagnostic data display device 40 are attached or provided inside the vehicle, and the diagnostic data analysis device (50) may be stored in vehicle-related businesses and engines such as gas stations or maintenance shops.

Accordingly, the driver may check the basic vehicle diagnosis state through the diagnostic code displayed on the diagnostic data display device 40. When the driver visits a gas station, the driver may provide the diagnostic data analysis device 50 with the diagnostic data display device ( By communicating in close proximity to 40), more specific vehicle diagnosis results can be provided in an output form.

More specifically, referring to FIG. 10, the self-diagnosis apparatus 30 is mounted on a predetermined portion inside the vehicle that is easily connected to the connector 20, displays diagnostic codes, and diagnostic data for facilitating short-range wireless communication. The display device 40 can be effectively attached to the upper surface of the vehicle front glass to implement the system according to the present invention.

Hereinafter, a vehicle diagnosis process using a wireless communication module using a device according to the present invention having the system configuration described above will be schematically described with reference to FIG.

First, after scanning the communication protocol of the electronic control unit (ECU) 10 regardless of the type of vehicle by the self-diagnosis device (S110), the self-diagnosis code for the diagnosis target device may be recognized using the identified communication protocol. The data value is converted to the mode (S120). The converted diagnostic code is displayed on the diagnostic data display device 40 described above (S130), and the wireless communication transmission module 43 capable of data transmission by short-range wireless communication to output an analysis result according to the diagnostic code. As a result, the diagnostic code is transmitted to the diagnostic data analyzing apparatus 50 (S140).

In addition, the diagnostic code transmitted above is analyzed by an analysis program previously stored in the memory 52 of the diagnostic data analysis apparatus 50 (S150), and the analysis result is output by the output means in the form of recognizable text and graphics. Output the diagnosis result (S160).

In the above, a preferred embodiment of the present invention has been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims.

According to an aspect of the present invention, even if a driver does not perform a separate device or operation, when an emergency or trouble code occurs in a self-diagnosis code output from an electronic control unit (ECU), anytime, anywhere through the self-diagnosis display device mounted in the vehicle The vehicle state and the fault state can be recognized.

In particular, the items to be frequently inspected can inform the driver in real time of the engine oil, fuel filter, mission oil (automatic and manual), brake fluid, timing belt check / replenishment / replacement.

According to another aspect of the present invention, the vehicle diagnosis information can be quickly and easily identified by transmitting the vehicle diagnosis information to the diagnosis data analysis device provided in the gas station and the like by providing the near-field communication module in the self-diagnosis display device.

According to another aspect of the present invention, by providing an output means for outputting the results to the diagnostic data analysis apparatus, the analysis results can be immediately printed and provided to the customer.

Claims (15)

In a vehicle diagnostic system using a wireless communication module, Regardless of the type of vehicle, after scanning the communication protocol of the ECU, the self-diagnosis code for the diagnosis target device is entered into a mode of data value that can be recognized by the driver through a predetermined terminal using the identified communication protocol. A self-diagnostic device connected to a connector to which one or more electronic control units (ECUs) mounted on a vehicle are coupled to produce; A wireless communication transmission module for transmitting the diagnostic code generated from the self-diagnostic apparatus to an external short range wireless communication receiving device through short range wireless communication; And And a diagnostic data analysis device including a wireless communication receiving module to receive a diagnostic code transmitted through short-range wireless communication and analyze the received diagnostic code. The method of claim 1, The magnetic diagnostic device, A plurality of electronic control units (ECUs) mounted on a vehicle are connected to a connected connector to scan a communication protocol of an electronic control unit (ECU) regardless of the type of vehicle, and then use the identified communication protocol to In order to output the self-diagnosis code in a form that can be recognized by the driver through a predetermined terminal, (a) an input / output unit (I / O unit) forming an interface for input / output of a cord and a connector and a wireless communication module to which a plurality of electronic control units (ECUs) mounted on a vehicle are coupled; And (b) in communication with each unit (ECU) by scanning each electronic control unit (ECU) connected to the connector through the input / output unit (I / O) in an initialization mode that proceeds after power is first applied; A first process of generating type information of the protocol and sequentially storing the information in the inactive memory; In the normal use mode after the initialization mode, the communication code of the diagnostic target device is transmitted from the electronic control unit (ECU) by communicating with each electronic control unit (ECU) using the communication protocol information stored in the inactive memory. Second process; And a central processing unit configured to perform a third process for allowing the diagnostic code transmitted from the second process to be transmitted to the wireless communication module through the input / output unit (I / O unit). Vehicle Diagnosis System. The method according to claim 1 or 2, Vehicle diagnostic system using the wireless communication module, A liquid crystal display unit for displaying a self diagnosis code transmitted from the self diagnosis device through a graphic interface so as to visually check the self diagnosis code; An alarm light for visually notifying the diagnosis state or an alarm for visually notifying the diagnosis state when the diagnosis code indicates a dangerous state of the device to be diagnosed as a result of the central processing unit determined according to a predetermined criterion; And a keypad unit capable of transmitting a predetermined command code to the central processing unit. The diagnostic data display apparatus further comprises a diagnostic data display device. The method of claim 3, The diagnostic data display device, Vehicle diagnostic system using a wireless communication module comprising a wireless communication module for transmitting a diagnostic code to the diagnostic data analysis device. The method of claim 1, The method for short-range wireless communication between the self-test device and the diagnostic data analysis device, And a radio frequency interface (RF interface) in each of the devices, and performing short-range wireless data communication between the devices when the interfaces are within a predetermined recognition distance. The method of claim 1, The method for short-range wireless communication between the self-test device and the diagnostic data analysis device, Infrared Data Association Interface (IrDA Interface) is provided in each of the devices, and when the interfaces are within a predetermined recognition distance, a short range wireless data communication between the devices is performed. . The method of claim 1, The diagnostic data analysis device, A wireless communication module configured to receive a diagnostic request comment and a diagnostic code transmitted from the self-diagnostic apparatus via near field communication; An input / output interface configured to transmit an input signal for controlling an operation of the diagnostic data analysis device or to transmit an analysis result of a diagnostic code to an output device; A memory unit configured to include a diagnostic result analysis program capable of calculating a predetermined diagnostic code-specific analysis result, an inactive memory in which data is stored, and an active memory in which diagnostic code data transmitted by the wireless communication module is temporarily stored; And A first process of temporarily storing the diagnostic code data transmitted from the wireless communication module in the active memory; A second process of calculating a diagnosis result using the stored diagnosis result analysis program and data; And a central processing unit configured to perform a third process of transmitting a diagnostic analysis result to an input / output interface to output the calculated diagnostic analysis result. The method of claim 7, wherein The diagnostic data analysis device, And a printing means for outputting and recognizing the diagnosis analysis result in the form of text and graphics. The method of claim 7, wherein The diagnostic data analysis device, And an external communication interface to transmit the diagnostic analysis result through an external storage medium. The method of claim 7, wherein Diagnostic result analysis program of the diagnostic data analysis device, Vehicle analysis system using a wireless communication module, characterized in that for storing the analysis results for each code corresponding to the transmitted diagnostic data in advance and outputs the analysis result matching the code. A self-diagnosis device for generating diagnostic data in a mode in which a driver can recognize a self-diagnosis code output from at least one electronic control unit (ECU) mounted in a vehicle; A wireless communication transmission module for transmitting the diagnostic code generated from the self-diagnostic apparatus to an external wireless communication receiving device through short range wireless communication; And a diagnostic data analysis device including a wireless communication receiving module to receive a diagnostic code transmitted through short-range wireless communication and analyze the received diagnostic code. (a) scanning the communication protocol of the electronic control unit (ECU) regardless of the type of vehicle by the self-diagnosis device, and using the identified communication protocol, Creating in mode; (b) transmitting a diagnostic code generated by the self-diagnostic apparatus to a diagnostic data analyzing apparatus by a wireless communication transmitting module capable of transmitting data by short-range wireless communication; And (c) analyzing the transmitted diagnostic code by means of a pre-stored analysis program in a memory of the diagnostic data analyzing apparatus and outputting the diagnostic result by output means in a form of recognizable text and graphics; Vehicle diagnostic method using a wireless communication module characterized in that. The method of claim 11, After step (a), and (a1) outputting the self-diagnosis code generated by the self-diagnosis device through a predetermined display device. The method of claim 11, The method for short-range wireless communication between the self-test device and the diagnostic data analysis device, R / F interface (Radio Frequency Interface) is provided in each device, the vehicle diagnostic method using a wireless communication module, characterized in that the short-range wireless data communication between the devices when the interface is within a predetermined recognition distance. The method of claim 11, The method for short-range wireless communication between the self-test device and the diagnostic data analysis device, Infrared Data Association Interface (IrDA Interface) is provided in each of the devices, and when the interfaces are within a predetermined recognition distance, vehicle wireless communication using the wireless communication module is characterized in that the short-range wireless data communication between the devices. Way. The method of claim 11, The method for outputting the analysis result in the diagnostic data analysis apparatus, And a printing means for outputting and recognizing the diagnosis analysis result in the form of text and graphics.