KR101816238B1 - Diagnosing system and method for an safety status of vehicle using the acceleration data and the change of acceleration pedal location - Google Patents

Abstract

The present invention relates to a method of diagnosing a safe state of a vehicle, and more specifically, to a method of diagnosing a safe state of a vehicle by using acceleration information on the vehicle and information on the amount of change in the accelerator pedal when a driver presses the accelerator pedal in a driving environment of an uphill, a downhill, or a flat road surface. According to an embodiment of the present invention, a system of diagnosing a safe state of a vehicle comprises: a first input part receiving position information on an accelerator pedal per predetermined time unit; a first calculation part calculating the positional change of the accelerator pedal using the position information on the accelerator pedal, which is received from the first input part; a second input part receiving speed information on the vehicle per predetermined time unit; a second calculation part calculating the vehicles acceleration by using the speed information on the vehicle, which is received from the second input part; a diagnostic part determining whether the acceleration of the vehicle in accordance with the change rate of the position of the accelerator pedal is within a normal range; an output part transmitting an output limit signal when the vehicles acceleration is not within the normal range; and a control part receives an output limit signal.

Description

TECHNICAL FIELD [0001] The present invention relates to a safety diagnosis system for a vehicle using a change amount and an acceleration information of an accelerator pedal, and a diagnostic method for the same.

More particularly, the present invention relates to a system and method for diagnosing a safety condition of a vehicle, and more particularly, to a system and method for diagnosing a safety condition of a vehicle, Thereby diagnosing the safety state of the vehicle.

The car receives the driver's torque request through the accelerator pedal and sets the target torque. Theoretically, the current torque level of the vehicle should be determined only as much as the driver's request through the accelerator pedal or other input means. However, due to vehicle shock or wear, damage to other components such as transmission, Or a problem of sudden emergence occurs. Since the vehicle can cause fatal damage to passengers and pedestrians due to a momentary malfunction, efforts must be made to precisely diagnose the acceleration or to control accordingly.

Korean Patent Laid-Open Publication No. 10-2015-0128041 detects the position of the accelerator pedal through a sensor for detecting the pedal pressure or detects the position of the pedal through a sensor for detecting the rotation angle of the accelerator pedal, A method is disclosed. Here, the sensor senses the position of the pedal or the driver's power, and is mainly used as a proximity switch consisting of a permanent magnet and a magnetic sensor, or a sensor using a light source and a photoelectric device which are directed to the pedal. In addition, as a sensor for sensing the rotation angle of the accelerator pedal, sensors for sensing the rotation angle using a magnitude of a magnetic field such as a hall sensor have been used.

In the above-described patent, the position of the accelerator pedal, the leg pressure, and the rotation angle at the instant of the moment are sensed as means for determining the intention of the driver. In addition, the vehicle is controlled according to the accelerator pedal output signal inputted to the monitoring unit. At this time, the abnormality acceleration judgment information includes the pedestrian information applied to the accelerator pedal, thereby improving the safety driving of the vehicle.

However, in the conventional art in which the position and rotation angle of the accelerator pedal are directly measured, pedal position information or rotational angle information is not normally collected when the pedal position sensor and the foot pressure sensor fail, Problems to be solved occur. In the prior art, defects of such sensors may be connected to an error of a safe operation such as a deceleration control, and unnecessary control operations may be involved in operation.

It is necessary to develop a technique for diagnosing the safety state of the vehicle more reliably.

In order to compensate for the above-mentioned weakness, the present invention uses both the pedal position sensor and the foot-and-mouth sensor information alone to determine the vehicle state using the positional change amount information, Control logic.

According to an embodiment of the present invention, there is provided a navigation system including a first input unit for inputting position information of an accelerator pedal on a predetermined time unit basis; A first calculator for calculating a positional change of the accelerator pedal using the position information of the accelerator pedal received from the first input unit; A second input unit for receiving the speed information of the vehicle at predetermined time intervals; A second calculation unit for calculating an acceleration of the vehicle using the speed information of the vehicle received from the second input unit; A diagnostic unit for determining whether the vehicle acceleration according to a change rate of the position of the accelerator pedal is within a normal range; An output unit for outputting an output restriction signal when the vehicle acceleration is not within the normal range; A control unit receiving the output limiting signal; And a data storage unit for storing a reference acceleration value of the vehicle according to a position change rate per unit time of the accelerator pedal calculated through the first calculation unit for each engine rpm interval, wherein the data storage unit stores a data set of an uphill driving state, And the vehicle safety state diagnosis system is characterized in that a data set is separately stored.

delete

Here, the reference acceleration value of the vehicle stored in the data storage unit may be stored in a look-up table format to shorten the calculation time.

According to an exemplary embodiment, the condition determination unit may further include a condition determination unit that determines whether the vehicle is in an uphill / flat / downhill running state as a condition for whether the vehicle safety condition diagnosis system is in operation.

Here, a gyro sensor or the like can be used as a means for judging whether or not the vehicle is in any of the uphill / flat / downhill running state.

According to another embodiment of the present invention, there is provided a method for controlling an accelerator pedal, the method comprising: a first step of receiving position information of an accelerator pedal at predetermined time intervals when the vehicle is judged as an uphill or a flat running; A first calculation step of calculating a position change rate of the accelerator pedal; A second input step of receiving speed information of the vehicle at predetermined time intervals; A second calculating step of calculating a current acceleration of the vehicle; A comparison is made between the reference acceleration and the current acceleration according to the position change rate calculated from the data storage unit of the vehicle in which the set of the reference acceleration data of the vehicle in the uphill running state and the set of the vehicle reference acceleration data in the case of the flat running state are stored A diagnostic step of determining whether the compared acceleration value exceeds a preset tolerance; And an output step of determining that the vehicle is driven differently from the intention of the driver and outputting an output limit signal when the compared acceleration value exceeds a predetermined tolerance.

According to one embodiment, it may further include a condition determining step of initially determining whether the vehicle is in an uphill / flat / downhill running state (before the inputting step).

Here, the reference acceleration in the diagnosis step may be a reference acceleration stored in a lookup table format.

According to an embodiment of the present invention, it is possible to implement safer rapid acceleration prevention control logic through data matching of the pedal position change amount for analyzing the driver's vehicle operation intention and the acceleration of the vehicle.

1 is a block diagram illustrating a vehicle safety condition diagnosis system according to an embodiment of the present invention.
2 is a block diagram illustrating a vehicle safety condition diagnosis system according to an embodiment of the present invention.
3 is a block diagram illustrating a diagnostic operation according to an embodiment of the present invention.
4 is a flowchart illustrating a method for diagnosing a vehicle safety condition according to an exemplary embodiment of the present invention.

The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, and thus the present invention is not limited thereto. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

It is to be understood that when an element is referred to as being connected or connected to another element, it may be directly connected or connected to the other element, but it should be understood that there may be other elements in between. Also, throughout this specification, when a member is " on " another member, it includes the case where there is another member between the two members as well as when the member is in contact with the other member.

In addition, it should be noted that the expressions such as 'first, second', etc. are used only to distinguish between plural configurations, and do not limit the order or other features between configurations.

1 is a block diagram illustrating a vehicle safety condition diagnosis system according to an embodiment of the present invention. 2 is a block diagram illustrating a vehicle safety condition diagnosis system according to an embodiment of the present invention. 3 is a block diagram illustrating a diagnostic operation according to an embodiment of the present invention.

As shown in FIG. 1, the system for diagnosing a vehicle safety condition according to an embodiment of the present invention includes a first input unit 110 for receiving position information of an accelerator pedal on a predetermined time basis; A first calculation unit 210 for calculating a positional change of the accelerator pedal using the position information of the accelerator pedal received from the first input unit 110; A second input unit 120 for receiving the speed information of the vehicle at predetermined time intervals; A second computing unit 220 for computing the acceleration of the vehicle using the speed information of the vehicle received from the second input unit 120; A diagnosis unit (300) for determining whether the vehicle acceleration according to a rate of change of the position of the accelerator pedal is within a normal range; An output unit 400 for transmitting an output limit signal when the vehicle acceleration is not within the normal range; And a controller 500 receiving the output limiting signal.

The safety state of the vehicle can be continuously diagnosed and learned through the configuration of the input units 110 and 120, the operation units 120 and 220, the diagnosis unit 300, the output unit 400, and the control unit 500. Here, the safety status of the vehicle means whether a series of vehicle acceleration systems related to the accelerator pedal operates without failure. If it is determined that the vehicle is in an abnormal state as a result of diagnosis of the safety state of the vehicle, the control unit adjusts the driving state of the vehicle (for example, decelerates the driving state of the vehicle) or provides warning notices to passengers .

Specifically, the first input unit 110 according to the present invention receives the position information of the accelerator pedal. The first input unit 110 includes a sensor for sensing the position of the pedal, the driver's pressure, or the rotation angle of the accelerator pedal, . For example, the sensor senses the position of the pedal or the driver's power, and may be a proximity switch comprising a capacitive type permanent magnet and a magnetic sensor, or a sensor using a light source and a photoelectric device to be directed to the pedal.

However, the present invention is different from the prior art in that the first input unit 110 newly receives the position information of the accelerator pedal at predetermined time intervals, and receives the position information of the accelerator pedal from the conventional accelerator pedal position information (A) The first calculation unit 120 calculates the rate of change of the position of the accelerator pedal by using the information B as shown in Fig. Here, the predetermined time interval may be, for example, 10 ms.

In this patent, since the safety state of the vehicle is confirmed using the rate of change of the pedal position, not the time when the accelerator pedal input signal is received, Which is different from the prior art.

More specifically, rather than simply knowing the current position as the position information of the accelerator pedal, the position change rate per unit time can be calculated by continuously collecting the accelerator pedal position information (in units of sec or msec). Assuming, for example, the accelerator pedal position information collected in units of msec (A: 2 msec pre-accelerator pedal position, B: 1 msec pre-accelerator pedal position) The position change rate per unit time of the pedal can be calculated.

Meanwhile, in the present invention, information on the speed of the vehicle may be input through the second input unit 120 and the acceleration of the vehicle may be calculated through the second operation unit 220. [ This is to calculate the acceleration of the vehicle in the present running state, thereby providing a reference element of the method for diagnosing the safety state of the present invention.

The diagnosis unit 300 comprehensively determines whether the vehicle acceleration according to the change rate of the position of the accelerator pedal is within the normal range. The diagnostic unit 300 compares the reference acceleration with the current vehicle acceleration and diagnoses the vehicle safety state. If the diagnosis unit 300 determines that the vehicle acceleration is not within the normal range, the output limit signal is transmitted through the output unit 400.

In the vehicle safety diagnosis system of the present invention, the control unit 500 can control the vehicle according to the input accelerator pedal output signal. For reference, the control unit 500 may be a component including an ECU (Engine Control Unit).

Referring to FIG. 2, the system for diagnosing a vehicle safety condition according to another embodiment of the present invention further includes a condition determination unit 100 and a storage unit 310.

The storage unit 310 stores the reference acceleration information of the vehicle obtained experimentally. The storage unit 310 calibrates the vehicle acceleration value according to the change rate of the position of the acceleration pedal per unit time of the engine rpm, And stores it as a data value.

3, the vertical direction (Z) is the vehicle acceleration measured experimentally, the X direction component of the horizontal direction component may mean the position change rate of the acceleration pedal per unit time, and the horizontal direction The Y direction component of the component may mean the RPM of the engine. In the vehicle safety state diagnosis system according to the embodiment of the present invention, the reference vehicle acceleration data is displayed in the 3D-surface map data in this way, thereby enabling a more stereoscopic diagnosis of the vehicle safety state. As shown in the figure, different data values are stored at the time A after the lapse of a certain time and the data at the time A, respectively.

Further, in the present invention, the reference acceleration value of the vehicle stored in the data storage unit may be stored in a look-up table format. The lookup table indicates the set (array) of the results calculated in advance for a given operation. This set (array) is used as a reference that can be used to retrieve values faster than the time to compute the result for a given operation. That is, the operation speed of the entire diagnostic system of the present invention can be improved by using the lookup table. Here, the lookup table accumulates enough experimental data to assume a reliable data set. In addition, the lookup table may be updated as the latest information by continuously learning information on the rate of change of the accelerator pedal position and information on the vehicle acceleration.

The current acceleration information calculated by the second calculation unit 220 is compared with the reference acceleration information stored in the data storage unit 310. If the current acceleration information is out of the predetermined reference range (i.e., the error range) as a result of the comparison, the diagnosis unit 300 can determine that there is a possibility of a failure (defect) in the accelerator pedal. At least the driver of the vehicle and the passenger of the accelerometer and related system to be aware that there is an abnormality role.

If it is determined that there is a possibility that the accelerator pedal is malfunctioning (defective) or the vehicle is running in an unintentional state through the diagnosis unit 300, the output unit 400 outputs an output restriction signal As shown in FIG. The control unit 500 receiving the output restriction signal may limit the vehicle to no further vehicle acceleration.

According to one embodiment, the data storage unit 310 may further include custom information of a vehicle driver. Here, the custom information of the driver of the vehicle means information on the rate of change of the accelerator pedal position or the power of the routine when the vehicle is in a normal driving state. The customized information of the driver may reflect a slightly different driving style for each driver, This is to increase accuracy. For example, the data storage unit 310 of the present invention may calculate the average value of the rate of change or the power of the accelerator pedal position of the driver of the vehicle, and readjust the reference acceleration information accordingly to improve the accuracy of diagnosis and control. When the reference acceleration information is readjusted, it is possible to increase the precision by setting the position change rate to a smaller time interval than the set time for receiving the position change rate. For example, if the time interval at which the accelerator pedal position information is input by the first input unit 110 is 10 ms, the accelerator pedal position information may be input at intervals of 2 ms, and the reference acceleration information may be readjusted to reflect the driver's custom information .

Meanwhile, the vehicle safety diagnosis system according to an embodiment of the present invention may further include a condition determination unit 310 for determining whether the vehicle is in an uphill / flat / downhill running state.

Generally, the vehicle inputs an accelerator pedal on a flat surface having an uphill or flat road surface, and does not input an accelerator pedal on an downhill running. Of course, the accelerator pedal can be input even in the downhill running according to the example. However, since the acceleration pedal can be inputted only in a very limited case, the present invention excludes the case of downhill running and inputs the input state information of the accelerator pedal only in the case of uphill or downhill running And enable the diagnostic system to operate. In the case of downhill driving, it is intentionally excluded because there are so many data control variables such as the input of the accelerator pedal and the action of gravity in the downward slope direction. This makes sense in terms of controlling the volume of data that can be enormous, and more precise diagnosis is performed because the vehicle safety condition is selectively diagnosed in an uphill running or a flat running state. For the reference, since the gravitational force in the oblique direction is applied in the uphill running state, the position change of the accelerator pedal or the magnitude of the power of the accelerator pedal is different according to the acceleration of the same vehicle. Therefore, the lookup table is a data set different from the flat running state .

Here, when it is desired to determine whether the vehicle is in the running state of uphill / flat / downhill running, a gyro sensor provided on one side of the vehicle can be used as the means.

Next, a method for diagnosing a vehicle safety state according to an embodiment of the present invention will be described. 4 is a flowchart illustrating a method for diagnosing a vehicle safety condition according to an exemplary embodiment of the present invention.

In this embodiment, the first input step (S420) of receiving the position information of the accelerator pedal at predetermined time intervals when the vehicle is judged as an uphill or a flat running; A first calculation step (S430) of calculating a position change rate of the accelerator pedal; A second input step (S440) of receiving speed information of the vehicle at predetermined time intervals; A second calculation step (S450) of calculating the current acceleration of the vehicle; A diagnosis step (S460) of comparing the reference acceleration with the current acceleration according to the position change rate calculated from the data storage unit of the vehicle and determining whether the compared acceleration value exceeds a predetermined tolerance; And an output step (S470) of determining that the vehicle is driven differently from the intention of the driver and outputting an output restriction signal when the compared acceleration value exceeds a preset tolerance.

And a condition determining step (S410) for determining whether the vehicle is in a running state of an uphill / flat / downhill running, as shown in FIG. 4, before the inputting step.

First, it is determined whether the vehicle is in an uphill / flat / downhill running state. If the uphill / downhill running is determined to be an uphill / downhill running, the next diagnostic step is performed. Can be terminated.

The first input step S420, the second input step S440, the first computation step S430 and the second computation step S450 are the same as those of the first input unit 110, the second input unit 120 ), The first calculation unit 210, and the second calculation unit 220, respectively, and can be inferred from the functions thereof, so a detailed description thereof will be omitted.

It should be noted that although the first input step and the second input step are shown in the drawings as S420 and S440, respectively, it should be noted that such a city does not determine the subsequent relationship of the steps. Each step may occur at this time, but may occur at the same time. Likewise, the first calculation step (S430) and the second calculation step (S450) are not determined by the description in the drawing.

Meanwhile, in the diagnosis step S460, the reference acceleration may be stored in a lookup table format. If it is determined that the safety state of the vehicle is normal in the diagnosis step, the data (for example, the current acceleration value) used in the comparison process can be used as an element for upgrading the lookup table as a new learning value.

In the output step S470, an output signal restricted to the components such as the controller 500 may be transmitted to provide an audiovisual signal that can ultimately reduce the vehicle speed and inform the driver of the abnormality do.

The present invention provides a system for diagnosing a safety condition of a vehicle and a method for diagnosing the safety state of the vehicle to provide a more secure and rapid acceleration through data matching based on the amount of change of the position of the pedal for analyzing the intention of the driver & Prevention control logic can be implemented.

Since the state of the vehicle is confirmed by using the position change rate information of the accelerator pedal rather than the time when the input signal of the accelerator pedal is received, a more robust control system than the conventional technology is provided.

The present specification is not intended to limit the present invention by the specific terms given. While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Modifications, alterations, and modifications can be made.

The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalents thereof are deemed to be included in the scope of the present invention. .

100: Condition determination unit
110: first input unit
120: second input section
210: first operation section
220: second arithmetic section
300:
310:
400: Output section
500:

Claims (7)

A first input unit for receiving the position information of the accelerator pedal in units of a predetermined time;
A first calculator for calculating a positional change of the accelerator pedal using the position information of the accelerator pedal received from the first input unit;
A second input unit for receiving the speed information of the vehicle at predetermined time intervals;
A second calculation unit for calculating an acceleration of the vehicle using the speed information of the vehicle received from the second input unit;
A diagnostic unit for determining whether the vehicle acceleration according to a change rate of the position of the accelerator pedal is within a normal range;
An output unit for outputting an output restriction signal when the vehicle acceleration is not within the normal range;
A control unit receiving the output limiting signal; And
And a data storage unit for storing a reference acceleration value of the vehicle according to a position change rate per unit time of the accelerator pedal calculated through the first operation unit for each engine rpm section,
Wherein the data storage unit stores the data set of the uphill running state and the data set of the flat running state separately.
delete The method according to claim 1,
Wherein the reference acceleration value of the vehicle stored in the data storage unit is stored in a look-up table format.
The method according to claim 1,
Further comprising a condition determination unit for determining whether the vehicle is in an uphill / downhill / downhill driving condition as a condition for whether the vehicle safety condition diagnosis system is in operation.
A first input step of receiving position information of an accelerator pedal at predetermined time intervals when the vehicle is judged to be an uphill or a flat running;
A first calculation step of calculating a position change rate of the accelerator pedal;
A second input step of receiving speed information of the vehicle at predetermined time intervals;
A second calculating step of calculating a current acceleration of the vehicle;
A comparison is made between the reference acceleration and the current acceleration according to the position change rate calculated from the data storage unit of the vehicle in which the set of the reference acceleration data of the vehicle in the uphill running state and the set of the vehicle reference acceleration data in the case of the flat running state are stored A diagnostic step of determining whether the compared acceleration value exceeds a preset tolerance; And
And an output step of determining that the vehicle is driven differently from the driver's intention and outputting an output limit signal when the compared acceleration value exceeds a predetermined tolerance.
6. The method of claim 5,
Further comprising: a condition judging step of judging whether the vehicle is in an uphill / flat / downhill running state at first.
6. The method of claim 5,
Wherein the reference acceleration is stored in a lookup table format in the diagnosis step.

Images