JP2009001066A - Accelerator pedal erroneous operation detector for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accelerator pedal erroneous operation detector for a vehicle having a significantly reduced possibility of erroneous detection. <P>SOLUTION: The accelerator pedal erroneous operation detector for a vehicle mounted in a vehicle for detecting an erroneous operation of an accelerator pedal includes a detection means for detecting a road state of a present location of its own vehicle, an identification means for individually identifying a driver of the own vehicle, a recording means for recording the history of an accelerator pedal operation per a road state detected by the detection means and per a driver identified by the identification means, and a determination means for determining that an accelerator pedal erroneous operation occurs when the operation amount of the accelerator pedal exceeds a first predetermined threshold value and the speed change of the operation amount of the acceleration pedal exceeds a second predetermined threshold value. The determination means changes at least one of the first predetermined threshold and the second predetermined threshold based on the history of the accelerator pedal operation recorded by the recording means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention generally relates to a vehicle accelerator pedal erroneous operation detection device that is mounted on a vehicle and detects an erroneous operation of an accelerator pedal, and more particularly, to a vehicle accelerator pedal erroneous operation detection device that greatly reduces the possibility of erroneous detection.

  2. Description of the Related Art Conventionally, a vehicular accelerator pedal erroneous operation detection device that is mounted on a vehicle and detects an erroneous operation of an accelerator pedal is known (see, for example, Patent Document 1).

Patent Document 1 discloses an apparatus that determines an erroneous operation of an accelerator pedal based on an accelerator pedal operation amount or a collision possibility and performs measures such as disabling the accelerator pedal or operating an automatic brake.
JP 2003-56371 A

  However, there are various ways to depress the accelerator pedal for each driver. Further, even if the driver is the same, if the driving performance and pedal response of the vehicle being driven are different, the pedal depression characteristics may change. Furthermore, even for the same driver and the same vehicle, there is a possibility that the way to step on the pedal will change if the driving situation is different.

  In the conventional device described in Patent Document 1, the threshold used for the determination of the accelerator pedal misoperation is fixedly set regardless of the difference in the driver, the vehicle, the driving situation, etc. (That is, it may be erroneously determined that the accelerator pedal is erroneously operated despite the normal operation of the accelerator pedal).

  For example, if the accelerator pedal operation is a rough driver, the accelerator pedal operation amount exceeds the threshold value and the accelerator pedal is not operated correctly even though the accelerator pedal operation is intended for normal acceleration. There is a possibility that it will be determined that this has been done.

  Also, for example, when driving a weak vehicle, if you operate the accelerator pedal to climb the uphill at the same speed as the surrounding vehicle, the operation amount will be close to full acceleration, exceeding the threshold, There is a possibility that it is determined that the accelerator pedal is erroneously operated.

  If an erroneous operation of the accelerator pedal is detected, the above-described control such as invalidation of the accelerator pedal or automatic brake operation is activated. Therefore, if an erroneous operation of the accelerator pedal is erroneously detected, the driving operation intended by the driver is hindered. become.

  As described above, the conventional device uses a fixed threshold value for the determination of the erroneous operation of the accelerator pedal without considering the change in the pedal depression characteristic that may be caused by the difference in the driver, the vehicle, and / or the driving situation. Therefore, the probability of misjudgment becomes relatively high, and it is difficult to say that it is convenient for the user.

  The present invention has been made to solve such problems, and a main object of the present invention is to provide a vehicular accelerator pedal erroneous operation detection device that greatly reduces the possibility of erroneous detection.

  One aspect of the present invention for achieving the above object is a vehicle accelerator pedal erroneous operation detection device that is mounted on a vehicle and detects an erroneous operation of an accelerator pedal, and a detection means for detecting a road condition at the current position of the host vehicle; An identification means for personally identifying the driver of the own vehicle; a recording means for recording a history of an accelerator pedal operation for each driver identified by the road condition detected by the detection means and the identification means; and an accelerator pedal operation Determination means for determining that an accelerator pedal misoperation has occurred when the amount exceeds a first predetermined threshold and the change speed of the accelerator pedal operation amount exceeds a second predetermined threshold; The means changes at least one of the first predetermined threshold and the second predetermined threshold based on the history of the accelerator pedal operation recorded by the recording means. To a accelerator pedal operation error detecting device for a vehicle.

  In the one aspect, the detection unit is a car navigation system including, for example, a host vehicle position detection unit and map information including road information.

  In the above aspect, the identification means identifies and identifies who the driver is based on, for example, biometric authentication or a personal identification number.

  According to the above aspect, the threshold for determining whether or not the accelerator pedal is erroneously operated is dynamically updated and set as appropriate based on the accelerator pedal operation according to the road condition of each driver in the vehicle. Therefore, it is possible to make a determination using an appropriate threshold value according to the vehicle, the driver, and the road condition, and the possibility of erroneous detection of an accelerator pedal misoperation is greatly reduced, thereby improving user convenience.

  In the above aspect, from the viewpoint of avoiding contact with a surrounding object such as another vehicle, the vehicle accelerator pedal erroneous operation detecting device detects the surrounding object of the host vehicle and measures the distance to the object. , Further comprising calculating means for calculating TTC (Time To Collision; collision time) and relative speed (= TTC change speed) with the object, wherein the determining means has an accelerator pedal operation amount of the first predetermined amount A threshold value is exceeded, the change speed of the accelerator pedal operation amount exceeds the second predetermined threshold value, the TTC is less than a third predetermined threshold value, and the relative speed is a fourth predetermined threshold value. Is exceeded, the first predetermined threshold value is determined based on the accelerator pedal operation history recorded by the recording means. It is preferable to change at least one of the second predetermined threshold, the third predetermined threshold, and the fourth predetermined threshold.

  According to the present invention, it is possible to provide a vehicular accelerator pedal erroneous operation detection device that greatly reduces the possibility of erroneous detection.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

  Hereinafter, a vehicle accelerator pedal erroneous operation detection device according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic configuration diagram of a vehicle accelerator pedal erroneous operation detection device 100 according to this embodiment.

  The vehicle accelerator pedal erroneous operation detection device 100 detects an object existing around the host vehicle, and if there is an object, the surrounding object detection unit 101 measures the relative distance, relative speed, and TTC between the object and the host vehicle. Have Here, the objects around the own vehicle are, for example, other vehicles (leading vehicle, succeeding vehicle, parallel running vehicle, etc.) that are running, guardrails, etc. if the own vehicle is running. If the vehicle is parked, it means other vehicles or walls that are parked.

  The peripheral object detection unit 101 is, for example, a radar device (for example, a laser radar, a millimeter wave radar, or the like), an image recognition camera (for example, a CCD (Charge Coupled Device) camera, or a CMOS (Complementary) known to those skilled in the art. It is assumed that an object existing around the host vehicle is detected by using a Metal-Oxide Semiconductor) camera and the like, and a relative distance, a relative speed, and a TTC with the object are measured.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes a vehicle speed detection unit 102 that detects the vehicle speed of the host vehicle. The vehicle speed detection unit 102 detects the vehicle speed of the host vehicle using, for example, a wheel speed sensor. As an alternative example, the vehicle speed of the host vehicle may be calculated from the time change of the host vehicle current position acquired from the car navigation system, as will be described later.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes a brake pedal stroke detection unit 103 that detects a brake pedal stroke and transmits a brake pedal stroke amount (depression amount) to a calculation / control unit 110 described later.

  The vehicle accelerator pedal erroneous operation detection device 100 further detects an accelerator pedal stroke, and calculates and controls an accelerator pedal stroke amount (depression amount) and a change speed (depression rate) of the accelerator pedal stroke amount, which will be described later. An accelerator pedal stroke detection unit 104 that transmits to 110 is included.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes a driver identification unit 105 that identifies and identifies a person who is currently performing the driving operation of the host vehicle. The driver identification unit 105 uses, for example, biometric authentication (for example, voiceprint authentication, palmprint (handprint) authentication, (palm) vein authentication, iris authentication, facial authentication, fingerprint authentication, etc.) known to those skilled in the art. The driver may be identified, or the driver may be identified by allowing a user to input a password for verification, a password, or the like from a predetermined input device.

  The vehicular accelerator pedal erroneous operation detection device 100 further includes a storage unit 106 which is an information storage medium of a type capable of reading and writing information (data). The storage unit 106 may have any format / capacity as long as information (data) can be read and written.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes an alarm unit 107 that issues a predetermined alarm to the vehicle occupant (especially a driver) when an erroneous operation of the accelerator pedal is detected. As long as at least the driver can be alerted that an erroneous operation of the accelerator pedal has been detected, the specific mode of the alarm and the output method thereof may be arbitrary.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes a brake control unit 108 that can control the brake system of the host vehicle independently of the driver's brake pedal operation, and the driver's accelerator pedal operation independent of the driver's accelerator pedal operation. An engine control unit 109 capable of controlling the engine output of the vehicle.

  The vehicle accelerator pedal erroneous operation detection device 100 further includes a calculation / control unit 110 that performs overall control of each component of the vehicle accelerator pedal erroneous operation detection device 100 and performs various calculations described below. The arithmetic / control unit 110 is, for example, an ECU (Electronic Control Unit).

  In the present embodiment, the calculation / control unit 110 receives, from a car navigation system (not shown), at least information about the current position of the host vehicle and information on the state of the road where the host vehicle is currently located (for example, uphill, downhill, etc.). Are configured to be transmitted.

  In the vehicular accelerator pedal erroneous operation detection device 100 having such a configuration, the calculation / control unit 110 detects the TTC with the peripheral object detected and calculated by the peripheral object detection unit 101 and the accelerator pedal stroke detection unit 104. The accelerator pedal stroke amount is stored in the storage unit 106 for each traveling scene as a history relating to the individual driver specified by the driver identification unit 105.

  Here, the traveling scene is specifically, for example, a section from when the own vehicle starts to stop again, and types include, for example, starting at an intersection, following a preceding vehicle, climbing slope, Possible highways, urban areas, traffic jams, etc.

  As a result, the accelerator 106 stroke operation history and the TTC history are integrated in the storage unit 106 for each driver and for each traveling scene.

  When the calculation / control unit 110 determines whether or not the accelerator pedal is erroneously operated in the procedure described later, the determination threshold value is stored in the storage unit 106 as the latest accelerator pedal operation history and the TTC history. Change / update dynamically based on

  That is, it is determined whether the threshold should be increased or decreased by comparing the driver and the driving scene at the time of determination with the history stored in the storage unit 105. More specifically, if it is determined that the accelerator pedal operation is relatively rough, it is determined that the TTC is relatively short by avoiding erroneous detection of the accelerator pedal operation error by increasing the threshold value related to the accelerator pedal operation. For example, an erroneous detection of an erroneous operation of the accelerator pedal is avoided by increasing the threshold value related to TTC.

  Next, the flow of the accelerator pedal erroneous operation determination process by the vehicle accelerator pedal erroneous operation detection device 100 will be described with reference to the flowchart of FIG.

  While the ignition switch is ON, the calculation / control unit 110 continues to dynamically update the determination threshold appropriately as described above (S201).

  In the actual erroneous operation determination, first, it is determined whether or not the brake pedal stroke detected by the brake pedal stroke detection unit 103 is 0 or less (S202).

  If the brake pedal stroke is greater than 0 (“NO” in S202), the driver is stepping on the brake pedal, and it is very unlikely that the driver has stepped on the accelerator pedal by mistake. It is determined that it is not, and one routine of this flow is immediately terminated.

  On the other hand, if the brake pedal stroke is 0 or less (“YES” in S202), it is determined that the driver is not stepping on the brake pedal, and then the accelerator pedal stroke amount is a predetermined threshold (here, “threshold A”). It is determined whether or not (S203).

  If the accelerator pedal stroke amount is equal to or less than the threshold value A ("NO" in S203), it is determined that the driver has not stepped on the accelerator pedal so as to cause rapid acceleration that should be avoided, and one routine of this flow is immediately terminated. .

  On the other hand, if the accelerator pedal stroke amount is greater than the threshold A (“YES” in S203), then whether or not the change speed of the accelerator pedal stroke amount exceeds a predetermined threshold (referred to herein as “threshold B”). Is determined (S204).

  When the change speed of the accelerator pedal stroke amount is equal to or less than the threshold value B ("NO" in S204), it is unlikely that the driver suddenly depressed the accelerator pedal with the intention of sudden braking and should be avoided. It is determined that no rapid acceleration occurs, and one routine of this flow is immediately terminated.

  On the other hand, when the change speed of the accelerator pedal stroke amount is larger than the threshold B (“YES” in S204), it is next determined whether or not TTC is less than a predetermined threshold (referred to herein as “threshold C”). (S205).

  When the TTC is equal to or greater than the threshold C (“NO” in S205), it is determined that the distance between the surrounding objects is sufficiently large and there is no risk of a collision due to sudden acceleration. Exit the routine immediately.

  On the other hand, if the TTC is less than the threshold C (“YES” in S205), then whether the relative speed with the surrounding object, which is the change speed of the TTC, is greater than a predetermined threshold (referred to herein as “threshold D”). It is determined whether or not (S206).

  If the relative speed is less than or equal to the threshold value D (“NO” in S206), it is determined that the speed difference with the surrounding objects is sufficiently large and there is no danger of a collision due to sudden acceleration. One routine is immediately terminated.

  On the other hand, when the relative speed is greater than the threshold value D (“YES” in S206), a result indicating that the accelerator pedal has been erroneously operated is obtained in all determination processes (S202 to S206) for detecting the accelerator pedal erroneous operation. It is determined that an erroneous operation of the accelerator pedal has been detected (S207).

  When an erroneous operation of the accelerator pedal is detected, the calculation / control unit 110 instructs the alarm unit 107 to output an alarm and instructs the engine control unit 109 to perform engine control so that rapid acceleration does not occur. . If the engine control unit 109 determines that the engine control unit 109 alone is not sufficient, the engine control unit 109 further instructs the brake control unit 108 to decelerate the host vehicle.

  As described above, the calculation / control unit 110 stores the accelerator pedal operation history and the TTC history stored in the storage unit 106 with the magnitudes of the threshold A, the threshold B, the threshold C, and the threshold D in the flowchart of FIG. Change and update dynamically based on

  More specifically, for example, each driver's accelerator pedal operation in various driving scenes, in order from the roughest, “rough”, “slightly rough”, “normal”, “slightly calm”, “slow” 5 By classifying in advance into stages and assigning appropriate values of threshold A and threshold B to each stage in advance, the values of threshold A and threshold B for driver X and driving scene Y can be quickly determined. Can be determined.

  Similarly, for example, each driver's TTC in various driving scenes is classified in advance into five stages of “short”, “slightly short”, “normal”, “slightly long”, and “long” in order from the shortest. In addition, by assigning appropriate values of the threshold C and the threshold D to each stage in advance, the values of the threshold C and the threshold D for the driver X and the driving scene Y can be quickly determined. .

  Thus, according to the present embodiment, the threshold value used for determining whether or not the accelerator pedal is erroneously operated is appropriately changed for each driver and for each driving scene. It is possible to perform an appropriate accelerator pedal misoperation determination that reflects the characteristics, and the possibility of erroneous detection of an accelerator pedal misoperation can be greatly reduced.

  In the above embodiment, as an example, the vehicle accelerator pedal erroneous operation detection device 100 includes the driver identification unit 105 and stores the accelerator pedal operation history and the TTC history in the storage unit 106 as data for each driver. However, the present invention is not limited to such an embodiment.

  For example, it is assumed that the vehicle accelerator pedal erroneous operation detection device 100 does not include the driver identification unit 105, and the accelerator pedal operation history and the TTC history stored in the storage unit 106 are erased every time the ignition switch is turned off. Alternatively, the characteristics of the driver at that time may be stored for each one trip, and reflected in the determination threshold when the learning progresses to some extent.

  In such a modified example, even if the driver is the same, the history cannot be taken over between trips, but a simple configuration in which the driver identification unit 105 is omitted can be achieved.

  The present invention can be used for an apparatus / system for detecting an erroneous operation of an accelerator pedal. The power source type, fuel type, appearance design, weight, size, running performance, etc. of the vehicle to be mounted are all unquestioned.

1 is a schematic configuration diagram of a vehicle accelerator pedal erroneous operation detection device according to an embodiment of the present invention. It is a flowchart which shows the flow of the accelerator pedal misoperation determination process by the accelerator pedal misoperation detection apparatus for vehicles which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Vehicle accelerator pedal erroneous operation detection apparatus 101 Surrounding object detection part 102 Vehicle speed detection part 103 Brake pedal stroke detection part 104 Accelerator pedal stroke detection part 105 Driver identification part 106 Storage part 107 Alarm part 108 Brake control part 109 Engine control part 110 Calculation・ Control unit

Claims (2)

A vehicle accelerator pedal erroneous operation detection device that is mounted on a vehicle and detects an erroneous operation of an accelerator pedal,
Detecting means for detecting the road condition of the current position of the vehicle;
An identification means for personally identifying the driver of the vehicle;
A recording means for recording a history of an accelerator pedal operation for each driver identified by the road condition detected by the detection means and the identification means;
Determining means for determining that an accelerator pedal operation error has occurred when the accelerator pedal operation amount exceeds a first predetermined threshold value and the change speed of the accelerator pedal operation amount exceeds a second predetermined threshold value; And
The determination unit changes at least one of the first predetermined threshold and the second predetermined threshold based on an accelerator pedal operation history recorded by the recording unit. Accelerator pedal misoperation detection device. The vehicle accelerator pedal erroneous operation detection device according to claim 1,
A calculation means for detecting an object around the host vehicle, measuring a distance to the object, and calculating a TTC and a relative speed with the object;
The determination means includes: an accelerator pedal operation amount exceeding the first predetermined threshold; an accelerator pedal operation amount changing speed exceeding the second predetermined threshold; and the TTC being a third predetermined threshold. When the value is below the threshold value and the relative speed exceeds a fourth predetermined threshold value, it is determined that an accelerator pedal operation error has occurred, and based on the history of the accelerator pedal operation recorded by the recording means, A vehicular accelerator pedal erroneous operation, wherein at least one of one predetermined threshold, the second predetermined threshold, the third predetermined threshold, and the fourth predetermined threshold is changed. Detection device.

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