WO2014104449A1

WO2014104449A1 - Vehicle diagnostic apparatus, and method therefor

Info

Publication number: WO2014104449A1
Application number: PCT/KR2012/011813
Authority: WO
Inventors: 이성종
Original assignee: Lee Sung Jong
Priority date: 2012-12-17
Filing date: 2012-12-28
Publication date: 2014-07-03
Also published as: KR101471721B1; KR20140078194A

Abstract

The present invention relates to a vehicle diagnostic apparatus and to a method therefor. The apparatus may comprise: an on-board diagnostics (OBD) connector connected to the OBD terminal of a vehicle; an initial value setting unit for correcting and initializing an internal set value based on the balancing state of the vehicle; a collision sensing unit for sensing whether the vehicle collides or not based on the values of a 3-axis acceleration sensor arranged in the collision sensing unit; and a communication unit for transmitting information on the collision of the vehicle to an emergency communication network through an external device when the collision sensing unit senses the collision of the vehicle.

Description

Vehicle diagnostic device and method

The present invention relates to a vehicle diagnostic apparatus and a method thereof, and more particularly, to detect the state of a vehicle in real time using an on board diagnostics (OBD) of an automobile, and to communicate with an emergency contact network through an external device in an emergency. A vehicle diagnostic apparatus and method thereof are provided.

With the spread of automobiles, automobiles are developing remarkably, and with the development of automobiles, the engine control unit (ECU) which controls various internal operations of the engine and the self-diagnosis connector that checks the condition of the vehicle (OBD: On Board Diagnostics) is also growing rapidly.

Most of the cars on the market now have a self-diagnostic connector, OBD connector, on the front dashboard.

However, in general, a car diagnostic device is about 10 million won or more, which is difficult for ordinary drivers to possess, and is stored in an auto repair shop, so when a car part is suspected of failure or a driver wants to diagnose a car failure, Visit the maintenance shop to connect the vehicle diagnostic device to the OBD connector and to check the car failure, in this case the driver had to visit the car repair shop directly.

In order to solve this problem, conventionally, the vehicle is connected to a PC connected to the Internet through an ECU communication interface device, and in this connection state, vehicle data (failure diagnosis data) is transmitted to the diagnostic service server through the PC to diagnose the failure of the vehicle ( Korean Patent No. KR10-0362260 discloses a technical idea, but the prior art has a problem that the inconvenience caused to use the PC must be connected directly to the vehicle, and there must be a PC that can be connected by wire Therefore, there is a problem in that the peripheral PC can not be used in the breakdown situation of the vehicle requiring an emergency.

In addition, by connecting (installing) a Bluetooth dongle to the OBD connector in the vehicle, the technical idea of the method of automatically transmitting the vehicle data when located in the service zone of the hot spot where the blue pitcher access point is installed (Korea Patent No. KR10-0512487) However, the related art includes a central processing unit and a backup battery that analyzes and stores a signal in a Bluetooth dongle and transmits data in a hotspot area (for example, a gas station), which causes a problem of high cost. In addition, there is a problem that it is difficult to improve the function of the Bluetooth dongle installed in the vehicle.

Accordingly, as the necessity of self-diagnosis increases, a low-cost entry-level vehicle diagnostic apparatus is required, and a system for preparing for an emergency situation is required.

The present invention provides a vehicle diagnostic apparatus for correcting and initializing three-axis acceleration sensor values according to a parallel state of a vehicle using an OBD connector, thereby correcting an initial value error that varies depending on a mounting state of a device, thereby increasing the accuracy of vehicle collision diagnosis. It provides a way.

The present invention provides a vehicle diagnostic apparatus and method for easily preparing for an emergency situation by transmitting an emergency situation to an emergency contact network through an external device when a collision is detected.

The present invention provides a vehicle diagnostic apparatus and method for further improving the accuracy of vehicle collision diagnosis by distinguishing a vehicle collision signal from noise.

An apparatus for diagnosing a vehicle according to an embodiment of the present invention includes an OBD connector connected to an on board diagnostics (OBD) terminal provided in a vehicle, and an initial value setting unit for correcting and initializing an internal set value according to a parallel state of the vehicle. And a collision detection unit detecting whether the vehicle is collided based on internally mounted three-axis acceleration sensor values, and when the collision detection unit detects a collision of the vehicle, the collision information of the vehicle is transmitted through an external device. It may include a communication unit for transmitting to.

According to an aspect of the present invention, the initial value setting unit may correct and initialize the internal setting value of the three-axis acceleration sensor when it is detected that the vehicle exists in a parallel position.

According to an aspect of the present invention, the vehicle may further include a noise discrimination unit for determining a collision signal and a noise signal of the vehicle.

According to one aspect of the invention, the noise determination unit includes an amplitude detection unit 60 for detecting the amplitude change of the signal recognized by the three-axis acceleration sensor, the signal recognized from the three-axis acceleration sensor, the first When the amplitude change more than a set value is represented and the amplitude change amount with respect to time of the amplitude change is more than a 2nd set value, it is judged as noise, and the signal recognized from the said 3-axis acceleration sensor shows the amplitude change more than the said 1st set value, If the change in amplitude with respect to time is less than the second set value, it may be determined that the vehicle crash signal.

Vehicle diagnostic method according to an embodiment of the present invention comprises the steps of correcting and initializing the internal set value in accordance with the parallel state of the vehicle, detecting whether or not the collision of the vehicle based on the mounted three-axis acceleration sensor values and When the collision detection unit detects a collision of the vehicle, it may include transmitting the collision information of the vehicle to the emergency contact network through an external device.

According to one embodiment of the present invention, by correcting and initializing the 3-axis acceleration sensor values according to the parallel state of the vehicle using the OBD connector, the initial value error that varies depending on the mounting state of the device is corrected to improve the accuracy of the vehicle collision diagnosis. The height is effective.

According to one embodiment of the present invention, when a collision is detected, an emergency situation is transmitted to an emergency contact network through an external device, so that an emergency situation can be easily prepared.

According to one embodiment of the present invention, by distinguishing the vehicle collision signal and noise, it is possible to further improve the accuracy of the vehicle collision diagnosis.

1 is a block diagram showing the configuration of a vehicle diagnostic apparatus according to an embodiment of the present invention.

2 is an amplitude graph for determining collision and noise according to an embodiment of the present invention.

3 is an operation flowchart showing a vehicle diagnostic apparatus and method thereof according to an embodiment of the present invention.

Hereinafter, with reference to the contents described in the accompanying drawings will be described embodiments of the present invention; However, the present invention is not limited or limited by the embodiments. Like reference numerals in the drawings denote like elements.

Referring to FIG. 1, a vehicle diagnostic apparatus according to an embodiment of the present invention may include an OBD connector 10, an initial value setting unit 20, a collision detection unit 30, and a communication unit 40.

First, the OBD connector 10 is connected to an OBD (On Board Diagnostics) terminal provided in a vehicle. In general, the OBD terminal allows the OBD connector 10 to view information on the main system of the vehicle or failure information transferred from the sensors attached to the ECU to the ECU on the console or external device of the vehicle. In one embodiment of the present invention, the vehicle diagnostic apparatus may supply power to the vehicle diagnostic apparatus and serve as a path for providing various information of the vehicle to the vehicle diagnostic apparatus.

The initial value setting unit 20 may correct and initialize the set value of the three-axis acceleration sensor mounted therein according to the parallel state of the vehicle detected by the OBD connector 10. That is, the vehicle diagnostic apparatus is connected to the OBD terminal provided in the vehicle as described above, in order to be mounted on the vehicle, the vehicle diagnostic apparatus after being connected to the OBD terminal may not be located parallel to the ground.

For example, when the OBD terminal is located in the lower part of the driver's seat, when the vehicle diagnostic apparatus is connected to the OBD terminal, the vehicle diagnostic apparatus is generally connected at an oblique angle without being connected in parallel with the ground. In this case, the force (gravity) acting on the three-axis sensor mounted inside the vehicle diagnostic apparatus is different, so that an error may occur with the initial setting value of the vehicle diagnostic apparatus (the value set in parallel with the vehicle diagnostic apparatus). have. Therefore, in consideration of the force applied while the vehicle diagnostic apparatus is connected to the OBD terminal, the set value of the three-axis acceleration sensor may be corrected and initialized to the corrected value.

On the other hand, the method of detecting the parallel state of the vehicle, the user can directly enter the angle and position or set the button with the vehicle in a parallel state, and equipped with a tilt sensor that can recognize the parallel inside the vehicle It is also possible to automatically detect the parallel state of the vehicle. In the latter case, when the vehicle recognizes the parallel state, a screen output, an alarm sound, or the like may be provided to the user to recognize that the vehicle is in the parallel state.

The initial value correction of the vehicle diagnostic apparatus may be corrected only when the vehicle diagnostic apparatus is first installed, or the user may selectively correct and initialize the set value of the 3-axis acceleration sensor whenever the vehicle power is applied. You can also do that.

In addition, the collision detection unit 30 may detect whether or not the vehicle collides based on the three-axis acceleration sensor values. The three-axis acceleration sensor is a sensor module that detects the acceleration applied to the three coordinates of the x, y, and z coordinates, and when the module is moved in a specific direction, the acceleration applied to the x, y, and z axes is extracted and output as data. Can be.

In the three-axis acceleration sensor, the input value in the parallel state of the vehicle may be set to '0'. For example, when at least one of each value of the sensor applied to the x, y, and z axes is greater than or equal to a preset value. It can be determined that a collision has occurred. As another example, a collision value may be detected by summing or calculating an average value of each value of a sensor applied to the x, y, and z axes.

For example, if it is detected that a collision has occurred when the sum value (absolute value sum value) of the acceleration sensor is 10 g or more, the acceleration is performed when the x-axis acceleration sensor value is 2g, the y-axis acceleration sensor value is 2g, and the z-axis acceleration sensor value is 2g. If the sensor value does not collide with 6g, and the x-axis acceleration sensor value is 1g, the y-axis acceleration sensor value is 10g, and the z-axis acceleration sensor value is 1g, the acceleration sensor value is detected as a collision with 12g.

As another example, if it is detected that a collision occurs when at least one of the values of the sensor is 8g or more, the collision is not a case where the x-axis acceleration sensor value 4g, the y-axis acceleration sensor value 4g, and the z-axis acceleration sensor value 4g is not a collision. When the acceleration sensor value 1g, the y-axis acceleration sensor value 10g, and the z-axis acceleration sensor value 1g are y-axis acceleration sensor values of 8g or more, it can be detected that a collision has occurred.

In addition, when the collision detection unit 30 detects a collision of the vehicle, the communication unit 40 may transmit the collision information of the vehicle to an emergency contact network through an external device.

The communication unit 40 detects and analyzes a collision signal and automatically transmits the collision signal to the emergency network based on the information, or asks the user whether to transmit the information to the emergency network, and then conflicts information according to the user's selection. May be transmitted to the emergency contact network. In other words, even when the collision is not made, the user may go through the process of approving the transmission of the information to the emergency network in order to prevent the case that the data is transmitted as a collision occurred in the emergency network.

For example, assuming that a collision occurred due to a determination error of a vehicle diagnostic device even though a collision did not occur in reality, before the collision information is transmitted to the emergency contact network, the collision occurs through a screen output to the user. You can query whether to send the information. In a situation where a collision does not occur, the user may select to not transmit the collision information to the emergency contact network so that incorrect information may not be transmitted. If a collision actually occurs, the user may transmit information by selecting and transmitting the collision information to the emergency contact network, and the user may enter the emergency contact network even when there is no selection input for a predetermined time (ex. Loss of consciousness, etc.). It may be operated to transmit the collision information.

On the other hand, the vehicle diagnostic apparatus may further include a noise determining unit 50 for determining the collision signal and the noise signal of the vehicle. That is, a signal input to detect a collision of the vehicle may be mixed with a signal due to an actual collision and a noise signal may be input to distinguish the signal, thereby improving the accuracy of collision diagnosis.

As an embodiment for distinguishing a vehicle from a collision signal and a noise signal, it is possible to use a method of distinguishing a collision signal from a noise by detecting an amplitude change of a signal input from each sensor, determining a time when an amplitude change occurs. have. This is because the amplitude change occurs in a very short time in the case of a noise signal, and the amplitude change occurs for a relatively long time in comparison with the noise signal.

To this end, the noise determination unit 50 may include an amplitude detection unit 60 for detecting an amplitude change of a signal recognized by the three-axis acceleration sensor. In this case, when the signal recognized from the three-axis acceleration sensor represents an amplitude change of more than a first set value and the amplitude change amount of time of the amplitude change is greater than or equal to a second set value, the recognized signal is determined to be mixed with noise. can do. In other words, even if the amplitude change is greater than the first set value, when the amplitude change amount over time is greater than the second set value, the amplitude change occurs within a short time, and thus it may be determined that noise has occurred.

In addition, when the signal recognized from the three-axis acceleration sensor indicates the amplitude change of the first set value or more, and if the amplitude change amount over time is less than the second set value, it may be determined that the vehicle collision signal. That is, if the amplitude change is significantly greater than the first set value and the amplitude change amount over time is less than the second set value, it is determined that the collision has occurred since the amplitude change has occurred for a relatively long time compared to the noise.

Referring to FIG. 2, collision and noise are determined according to signals recognized by the three-axis acceleration sensor. The signal a represents an amplitude change less than the first set value and corresponds to a normal signal since the amplitude change amount of the amplitude change is constant over time.

When a shape such as a b signal is detected, this represents an amplitude change of more than a first set value, and since the amplitude change amount of time of the amplitude change is more than a second set value, the b signal may be determined to be noise.

In addition, when a shape such as a signal c is sensed, this may be determined as a vehicle crash signal since the amplitude change of the first setting value is greater than the first setting value and the amplitude change over time is less than the second setting value.

As described above, according to the present invention, by correcting and initializing the three-axis acceleration sensor values according to the parallel state of the vehicle, it is possible to correct the initial value error that varies depending on the mounting state of the device to increase the accuracy of the vehicle collision diagnosis Occurs.

In addition, according to an embodiment of the present invention, it is possible to provide a vehicle diagnostic method for detecting a collision of the vehicle and transmitting the collision information to the emergency contact network through an external device.

3 is a flowchart illustrating a vehicle diagnostic method according to an exemplary embodiment of the present invention.

Vehicle diagnostic method according to an embodiment of the present invention can be implemented by a vehicle diagnostic apparatus, although not described below, parts common to those described in the vehicle diagnostic apparatus can be applied equally to those skilled in the art It is.

Referring to FIG. 3, the vehicle diagnostic method may include correcting and initializing an internal setting value according to a parallel state of the vehicle (S10); Detecting whether the vehicle is collided based on internally mounted three-axis acceleration sensor values (S20); And when the collision detection unit 30 detects a collision of the vehicle, transmitting the collision information of the vehicle to an emergency contact network through an external device (S30).

Therefore, when the vehicle is in a parallel state, the set value of the three-axis acceleration sensor installed therein is initialized to zero, or the user can arbitrarily correct it. Subsequently, based on the set 3-axis acceleration sensor values, if the sum or average value of the 3-axis acceleration sensor is greater than or equal to a set value, the collision is detected. At this time, when a collision is detected, the collision information of the vehicle is transmitted to an emergency contact network through an external device. Analyze the amplitude change amount of the collision signal to determine the collision signal and noise signal to transmit information to the emergency contact network, or whether to approve the transmission of collision information to the navigation or digital device of the vehicle to the outside before transmitting to the emergency contact network. After the request, information can be transmitted according to the input situation.

For example, in case of a collision, a request of 'Do you want to send crash information?' Appears on the navigation screen of the vehicle or the display of the digital device, and the user selects “YES” or a predetermined time (ex. 10 seconds). If no choice is made during the event, it can be detected as a collision and transmitted to the emergency network.

As described above, in the present invention, while detecting a collision of the vehicle and transmitting the collision occurrence information to the emergency contact network, the user has a step of confirming, it is possible to prevent the wrong information transmission according to the determination error in advance.

In addition, it is possible to provide a vehicle diagnostic apparatus that improves the accuracy of crash diagnosis by distinguishing noise and a crash signal using the amplitude change magnitude of the signal and the amplitude change amount with respect to time.

In addition, the vehicle diagnostic method according to an embodiment of the present invention may be recorded in a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The medium or program instructions may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although one embodiment of the present invention as described above has been described by a limited embodiment and drawings, one embodiment of the present invention is not limited to the above-described embodiment, which is a general knowledge in the field of the present invention Those having a variety of modifications and variations are possible from these descriptions. Accordingly, one embodiment of the invention should be understood only by the claims set forth below, all equivalent or equivalent modifications will be within the scope of the invention idea.

Claims

An OBD connector connected to an on board diagnostics (OBD) terminal provided in a vehicle;

An initial value setting unit for correcting and initializing an internal setting value according to the parallel state of the vehicle;

A collision detector configured to detect whether the vehicle collides based on internally mounted three-axis acceleration sensor values; And

When the collision detection unit detects a collision of the vehicle, the communication unit for transmitting the collision information of the vehicle to the emergency contact network through an external device

Vehicle diagnostic apparatus comprising a.
The method of claim 1,

The initial value setting unit,

And when the vehicle is detected to exist in a parallel position, correcting and initializing an internal setting value of the three-axis acceleration sensor.
The method of claim 1,

Noise discrimination unit for discriminating the collision signal and the noise signal of the vehicle

Vehicle diagnostic apparatus further comprises.
The method of claim 3,

The noise discrimination unit,

An amplitude sensing unit 60 for sensing an amplitude change of a signal recognized by the three-axis acceleration sensor,

If the signal recognized from the three-axis acceleration sensor indicates an amplitude change of more than a first set value and the amount of change in amplitude with respect to time of the amplitude change is greater than or equal to a second set value, it is determined as noise.

And a signal recognized from the three-axis acceleration sensor indicates an amplitude change of the first set value or more, and determines that the signal is a vehicle crash signal if the amplitude change amount over time is less than the second set value.
Correcting and initializing an internal set value according to a parallel state of the vehicle;

Detecting the collision of the vehicle based on internally mounted three-axis acceleration sensor values; And

If the collision detection unit detects a collision of the vehicle, transmitting the collision information of the vehicle to an emergency contact network through an external device;

Vehicle diagnostic method comprising a.