KR102555917B1 - Vehicle and method for disengaging brake - Google Patents

Abstract

The present invention relates to a vehicle capable of externally releasing a parking brake and a method for performing the same. A parking brake release method according to an embodiment of the present invention includes activating a camera for photographing the outside of a vehicle in a state in which an electronic parking brake (EPB) is engaged; Determining whether the image input through the camera corresponds to a preset first pattern set; and releasing the electronic parking brake when the determination result corresponds to the first pattern set.

Description

Car and brake release method for it {VEHICLE AND METHOD FOR DISENGAGING BRAKE}

The present invention relates to a vehicle capable of externally releasing a parking brake and a method for performing the same.

A typical vehicle uses a P-stage engagement of a transmission and a parking brake to prevent movement of the vehicle during parking. Here, the P stage uses the parking sprag of the drive shaft, and the parking brake physically pulls a wire to operate the drum brake. For the operation of such a drum brake, it is also called a side/hand brake or a pedal-type hand brake according to the position of the operating means that mechanically pulls the wire.

Recently released vehicles adopt an electronic parking brake (EPB) that electronically controls the operation of the drum brake. The electronic parking brake also supports an auto hold function that prevents the vehicle from moving even if the hydraulic brake is released after the vehicle stops. For example, if the ignition is turned off while the auto hold function is activated, the parking brake is automatically activated.

On the other hand, apartment complexes built a long time ago do not have underground parking lots, and even ground parking spaces are often insufficient, so double or triple parking frequently occurs depending on the time of day. In double parking, it is common to put the transmission in N-range and release the parking brake to leave the vehicle in a state where it can be moved by external force. However, as described above, the electronic parking brake is automatically engaged during parking according to the auto hold function, but since the driver has never operated the parking brake himself, he does not recognize this and often leaves only the transmission in N gear. Therefore, even if the transmission state is neutral, the vehicle is in a state of being unable to move due to the parking brake, causing inconvenience that other drivers have to call the driver of the corresponding vehicle to the parking lot.

The present invention is to provide a method capable of releasing the parking brake from the outside and a vehicle capable of performing the same.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

In order to solve the above technical problem, a parking brake release method according to an embodiment of the present invention includes activating a camera for photographing the outside of a vehicle in a state in which an electronic parking brake (EPB) is engaged; Determining whether the image input through the camera corresponds to a preset first pattern set; and releasing the electronic parking brake when the determination result corresponds to the first pattern set.

In addition, a vehicle according to an embodiment of the present invention includes an electronic parking brake (EPB); a camera that is activated when a specific condition is satisfied in a state in which the electronic parking brake is engaged and photographs the exterior of the vehicle; and a control unit determining whether the image input through the camera corresponds to a preset first pattern set, and controlling the electronic parking brake to be released if the image corresponds to the first pattern set as a result of the determination. can

The vehicle according to at least one embodiment of the present invention configured as described above is convenient in that the parking brake can be released from the outside of the vehicle through gesture pattern recognition through an image input means.

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

1 is a block diagram showing an example of a vehicle structure according to an embodiment of the present invention.
2 shows an example of a form in which a pattern for EPB release is input through an AVN system according to an embodiment of the present invention.
3 is a flowchart illustrating an example of a camera control process for releasing an EPB of a vehicle according to an embodiment of the present invention.
4 shows an example of a process of filtering an input image according to an embodiment of the present invention.
FIG. 5 shows a form of pattern recognition according to a shade value based on the input image filtered through the process of FIG. 4 .
6 shows an example of a pattern determination process according to an embodiment of the present invention.
7 shows an example of an input pattern processing process according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. In addition, parts denoted with the same reference numerals throughout the specification mean the same components.

In one embodiment of the present invention, when the parking brake of the vehicle is engaged, the parking brake is released when an image of a preset pattern is recognized through an image recognition means for acquiring an image outside the vehicle, provided in the vehicle, It is proposed to enable the parking brake to be released from outside the vehicle without manipulation inside the vehicle.

According to one aspect of the present embodiment, the image recognizing means for obtaining an image outside the vehicle may be a rear camera, and the image of a preset pattern may be a change in shade caused by passing the rear camera in close contact with a finger or the like. The set pattern may be set by the driver.

Also, according to one aspect of this embodiment, the image recognizing means may be vibration or impact of a specific pattern applied to the vehicle.

Hereinafter, a vehicle structure for carrying out this embodiment will be described with reference to FIG. 1 . 1 is a block diagram showing an example of a vehicle structure according to an embodiment of the present invention.

Referring to FIG. 1 , a vehicle according to an embodiment may include an input unit 10, a control unit 20, and an output unit 30. The input unit 10 may again include an AVN (Audio/Video/Navigation) system 11, a camera 12, and a sensor 13, and the controller 20 includes a body controller 21 and an image processing controller 22. ) and an impact recognition controller 23, and the output unit 30 may include an electronic parking brake (EPB, 31). Hereinafter, each component is described.

When the EPB 31 is fastened, the AVN system 11 may receive a pattern to be input to the camera 12 from the driver to release it, and the input pattern may be transmitted to the image processing controller 22 .

The camera 12 may be woken up by the body controller 21 in a state in which the engine is turned off, and may receive an external image and transmit it to the image processing controller 22 in the wake-up state. The camera 12 may be any one of cameras constituting an advanced driver assistance system (ADAS) or an around view monitor (AVM) system, but in the following description, it is assumed that it is a rear camera that captures a rear image of the vehicle for convenience. .

The sensor 13 can detect shock/vibration applied to the vehicle body from the outside or movement/acceleration of the vehicle body, and can transmit them to the shock recognition controller 23 . For example, the sensor 13 may include an acceleration (G) sensor or an impact sensor.

The body controller 21 may be implemented in the form of a body control module (BCM) or an integrated body unit (IBU), but is not necessarily limited thereto, and includes at least a shock recognition controller 23, Any controller that can control the image processing controller 22 and the EPB 31 can perform the function according to the present embodiment. For example, the body controller 21 may activate the image processing controller 22 and the camera 12 when receiving a camera activation signal from the shock recognition controller 23 in a state in which the engine is turned off. At this time, the body controller 21 may operate an external output means (eg, a head lamp, a turn signal lamp, a horn, an external speaker, etc.) in a preset form to inform the outside of the activation of the camera 12 . Then, when an EPB release signal is received from the image processing controller 22, the EPB 31 can be released.

The image processing controller 22 receives pattern information for EPB release from the AVN system 11, analyzes the image input through the camera 12 when activated by the body controller 22, and releases the EPB when the corresponding image is released. It is determined whether it matches the pattern information for , and if it matches, an EPB release signal can be transmitted to the body controller 21. Depending on the embodiment, the image processing controller 22 may be an ADAS controller or implemented as one function of the AVN system 11, but is not necessarily limited thereto.

The impact recognition controller 23 determines whether the shock/vibration/body motion applied to the vehicle matches the pattern (or pattern set) for activating the camera 12 through the signal detected by the sensor 13, and In this case, a camera activation signal may be transmitted to the body controller 21 . For example, the shock recognition controller 23 may be implemented in the form of a DVRS (Digital Video Recording System), a black box, or the like.

The EPB 31 may engage/disengage the parking brake under the control of the body controller 21 .

Of course, the above-described configuration only shows configurations related to the present embodiment, and it is obvious to those skilled in the art that an actual vehicle may include more or less components than these depending on implementation.

Hereinafter, a process of storing a pattern for EPB release will be described with reference to FIG. 2 . 2 shows an example of a form in which a pattern for EPB release is input through an AVN system according to an embodiment of the present invention.

Referring first to (a) of FIG. 2 , when a driver of a vehicle according to an embodiment calls a pattern input menu for releasing an EPB through a predetermined menu manipulation, four dots 210 appear on the display of the AVN system 11. , 220, 230, 240) may be displayed. In this state, the user may input a pattern for releasing the EPB by connecting two different points horizontally or vertically. At this time, the AVN system 11 can recognize only a predetermined pattern type (eg, a horizontal pattern or a vertical pattern), and re-inputs when a different pattern type (eg, a diagonal pattern) is input. can induce Also, the AVN system 11 may sequentially receive a predetermined number of patterns. A plurality of patterns that are sequentially input may constitute one pattern set, and EPB release may be performed only when all patterns constituting the pattern set are sequentially recognized.

For example, a touch input starting at the top point 210 and ending at the bottom point 230 as shown in FIG. Bottom->Upper) The inputted touch input may be referred to as a second pattern.

Similarly, a touch input starting from the left point 220 and ending at the right point 240 as shown in (c) of FIG. 2 can be referred to as a third pattern, , Right->Left) The input touch input may be referred to as a fourth pattern. Eventually, the pattern set may be composed of 113, 134, 224, etc., but the number of individual patterns constituting the pattern set may be set differently. As described above, information on the input pattern set may be transmitted to the image processing controller 22 .

In addition, the position and shape of each dot shown in FIG. 2 is also illustrative, and a pattern may be input through a display object having a different number, position, and shape as needed. In addition, the input of the pattern may be received through other input means such as a keypad, a touch pad near the center console, and a dial rather than the display of the AVN system 11 .

Next, with reference to FIG. 3 , an EPB releasing process will be described focusing on the operation of the camera. 3 is a flowchart illustrating an example of a camera control process for releasing an EPB of a vehicle according to an embodiment of the present invention.

In FIG. 3, it is assumed that a pattern set for EPB release is stored in advance through the same process as in FIG. 2, and a shock/vibration pattern for camera activation is also pre-determined (eg, input by the driver or input by the manufacturer when the vehicle is shipped). do. In addition, the present vehicle is double-parked with the transmission in the N-range but the EPB engaged, and another driver calls the driver of the present vehicle to request the vehicle to be moved. In this case, the driver of the present vehicle may inform another driver of the shock/vibration pattern for activating the camera and the pattern set for releasing the EPB over the phone. Accordingly, another driver may first input an impact/vibration pattern (eg, a shock by pushing the vehicle backward once in front of the vehicle and then tapping the bonnet three times) to activate the camera (S310).

The shock/vibration is detected by the sensor 13, and the shock recognition controller 23 determines whether the pattern is the same as a preset camera activation (on) pattern (S320). is transmitted to the body controller 21.

The body controller 21 activates the camera 12 and the image processing controller 22 to wait for a pattern input to release the EPB (S330), and activates a predetermined external output so that other drivers can know that the camera is activated. It can be done (S340). For example, the predetermined external output may be a form in which an emergency light is turned on once and a beep sound is output or a general hazard, but is not necessarily limited thereto.

The camera 12 maintains an on state until the elapsed time (T) from the activation point reaches a preset camera off time (τ) (S350), and may be turned off when the camera off time (τ) is reached. Yes (S360). Therefore, it can be seen that the camera off time τ corresponds to the time at which the pattern set for EPB release can be input at the maximum.

Next, a process of performing pattern recognition in the image processing controller 22 through an image input through a camera will be described with reference to FIGS. 4 to 6 .

4 shows an example of an input image filtering process according to an embodiment of the present invention, FIG. 5 shows a pattern recognition form according to a shade value based on the input image filtered through the process of FIG. 4, and FIG. An example of a pattern determination process according to an embodiment is shown respectively.

First, in FIG. 4 , it is assumed that a person who wants to release the EPB from the outside inputs a pattern in a manner in which a person who wants to release the EPB from the outside puts his or her finger in close contact with the rear camera while the rear camera is activated.

For example, as shown at the top of FIG. 4, when the finger inputs the third pattern (ie, left->right) described above with reference to FIG. 3, the portion covered by the finger from the left at time t becomes dark, At the time point t+1, the dark area gradually expands and moves to the right, and at the time point t+2, it starts to brighten from the left again, and at the time point t+3, the dark area gradually disappears to the right.

In this case, filtering may be performed based on a shadow value to improve image recognition efficiency. For example, in order to extract a portion where a finger passes from camera image data, a shade value corresponding to a portion covered by a finger may be selected as a reference shade value. By selecting this reference shade value as a filter, the image is generated in the middle of FIG. It can be simplified as in, and the simplified image can be matrixed again as shown in the lower part of FIG.

Meanwhile, the simplified image may be interpreted as a pattern through quadrant segmentation. For example, if the upper right corner of the simplified image as shown in the middle left of FIG. 4 is called quadrant 1, the upper left corner is quadrant 2, the lower left corner is quadrant 3, and the lower right corner is quadrant 4, the third pattern is 2/3 at time point t In the quadrant, the shaded data starts to increase. After that, at the time point t+1, almost all the data in the 2/3 quadrants show shaded values, and the shaded values start to appear in the 1/4 quadrants. In addition, at the time point t+2, the 2/3 quadrant shading value decreases and the 1/4 quadrant shading value reaches its maximum. After that, at the time point T+3, the 2/3 quadrant shading values disappear and only the 1/4 quadrant shading values remain. A graph according to a change in time t for the sum of shadow values (∑: SUM) using such quadrant division can be organized as shown in FIG. 5 .

An input pattern may be determined according to the order shown in FIG. 6 based on the change characteristic of the total shade value over time for each pattern.

Referring to FIG. 6 , the image processing controller 22 may filter an image captured by the camera 12 and determine a starting quadrant group based on the sum (∑) value of shadows for each quadrant (S601). . Here, the starting quadrant group may refer to two quadrants in which the increase in the sum of shadow values is the highest after the camera is activated.

For example, when a pattern input by a person attempting to unlock the EPB is the third pattern, the 2/3 quadrant becomes the starting quadrant group. As the pattern input progresses, the total shaded value of the starting quadrant group will gradually increase, and the image processing controller 22 checks the total shaded value of the starting quadrant group (S602), and sets the maximum value to the maximum value of the starting quadrant group. It can be stored as a value (M_1) (S603).

After that, when the first time (a1) has elapsed, the image processing controller 22 determines whether or not the total value of the shadows of the end quadrant group has increased (S604), and if so, the start quadrant group as the second time (a2) has elapsed. It is determined whether the total shaded value of is decreased (S605). Here, the ending quadrant group may refer to the remaining two quadrants located in opposite directions of the starting quadrant group, that is, excluding the starting quadrant group. That is, when a person wishing to release the EPB from outside the vehicle correctly inputs a specific pattern, the finger starting from the starting quadrant group moves toward the ending quadrant group and disappears from the ending quadrant group. In addition, the first time (a1) means the time when the finger first arrives at the end quadrant group experimentally when the finger sweeps the camera 12 (ie, the time when the shade value of the end quadrant group starts to increase). , and the second time (a2) may refer to the time at which the shading value of the starting quadrant group experimentally begins to decrease when the finger sweeps over.

When the sum of the shadows of the start quadrant group decreases while the sum of the shadows of the end quadrant group increases, it may mean that the finger moves in a certain direction, so the image processing controller 22 determines the sum of shadows of the end quadrant group. After checking (S606), the maximum value (M_2) can be stored (S607).

The image processing controller 22 may multiply the maximum sum value of shadows (M_2) of the end quadrant group by a predetermined ratio (r%) and compare the result with the maximum sum value (M_1) of the shadow group of the start quadrant group (S608). In this case, the ratio value r may mean an effective ratio of the maximum shade value M_2 of the ending quadrant group to be measured later to the maximum shade total value M_1 of the first quadrant group experimentally measured. This is because the motion of the finger can be determined only when a value similar to the M_1 value is measured for the M_2 value.

As a result of the comparison, when the value of M_1 is greater, the image processing controller 22 checks the sum value of the shadows of the ending quadrant group (S609), and after the lapse of the third time (a3), the sum value of the shadows of the ending quadrant group decreases. If so, it can be determined that the pattern input through the finger ends (S610). Here, the third time (a3) may refer to the time when the shading value of the end quadrant group starts to decrease experimentally when sweeping with a finger.

Thereafter, when the total value of the shadows of all quadrants is less than an appropriate value (OFF) for determining that there is no finger (S611), the image processing controller 22 determines that a pattern starting from the start quadrant group and heading toward the end quadrant group is input. It can (S612). For example, the image processing controller 22 may determine that the third pattern is input when the 2/3 quadrant is the starting quadrant group and the 1/4 quadrant is the ending quadrant group.

Next, referring to FIG. 7 , a process in which the image processing controller 22 receives an individual pattern, determines whether it corresponds to a pattern set, and releases the EPB will be described. 7 shows an example of an input pattern processing process according to an embodiment of the present invention.

Referring to FIG. 7 , the image processing controller 22 analyzes an image input from a rear camera (S710) and determines a pattern for each input order (S720). Here, steps S710 and S720 may be processes corresponding to FIG. 6 described above.

The determined patterns are sequentially stored (S730), and when one more number (ie, n+1) of patterns than the number (n) constituting the pattern set is input (S740), the image processing controller 22 It is determined whether the pattern set consisting of the nth pattern from the beginning is the same as the preset pattern set for EPB release (S750). Here, the n+1th pattern may be a pattern in a preset form (eg, completely covering the camera for 3 seconds) indicating that pattern set input is terminated after n patterns constituting the pattern set. Therefore, the image processing controller 22 determines whether the pattern set consisting of the nth pattern from the first pattern is the same as the pattern set for EPB release when the n+1th pattern coincides with the pattern indicating that the pattern set input is finished. It can be configured to determine.

As a result of the determination, if the pattern sets are the same, the image processing controller 22 transmits the EPB release signal to the body controller 21, and the body controller 21 releases the EPB 31 and sets a predetermined setting for informing the outside. It is possible to perform an external output in the form of (eg, two Hazard outputs) (S760).

Meanwhile, in preparation for an error in pattern input, the image processing controller 22 may increase the count by 1 when the pattern set does not match, and reset (T=0) the stored determination result of the individual pattern (S770). At this time, a predetermined external output (eg, one-time output of a horn) may be generated to inform the outside of EPB release failure or pattern set mismatch.

If the count reaches a preset number of times (here, 3 times) (S780), it may be initialized to a state in which a pattern input for releasing the EPB is not received (S790).

According to the above-described embodiments, the pattern for unlocking the EPB according to the present invention when the vehicle owner is unable to respond to another person's EPB release request in a situation where the car cannot be moved due to EPB locking during double parking in an apartment built in a downtown area such as Seoul. If the set is notified to others, the EPB can be released even in the absence of the vehicle owner. Accordingly, inconvenience to residents as well as inconvenience to vehicle owners can be resolved.

The above-described present invention can be implemented as computer readable code on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. there is

Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (17)

activating a camera for photographing the outside of the vehicle in a state in which an electronic parking brake (EPB) is engaged;
Determining whether the image input through the camera corresponds to a preset first pattern set; and
When the determination result corresponds to the first pattern set, the parking brake release method comprising the step of releasing the electronic parking brake. According to claim 1,
Further comprising detecting at least one of shock and vibration applied to the vehicle in a state in which the ignition is turned off,
The activation step is
The method of releasing the parking brake, which is performed when at least one of the sensed shock and vibration matches a preset second pattern set. According to claim 1,
The first pattern set,
A parking brake release method comprising a plurality of patterns having an input sequence. According to claim 3,
In the step of determining whether or not it corresponds to the preset first pattern set,
filtering the image input through the camera with respect to a shadow value; and
And determining a plurality of input patterns sequentially input based on a change in the total value of shadows over time in the filtered image. According to claim 4,
In the step of determining whether or not it corresponds to the preset first pattern set,
The parking brake release method further comprising determining whether the plurality of input patterns sequentially input are the same as the plurality of patterns included in the first pattern set. According to claim 4,
In the step of determining the plurality of input patterns sequentially input, for each of the plurality of input patterns,
determining a total value of shadows of the filtered image for each of a plurality of regions;
determining a start area group and an end area group based on the total shaded value determined for each area; and
and determining a pattern corresponding to the start area group and the end area group from among a plurality of preset pattern types. According to claim 6,
The step of determining the start region group and the end region group,
and determining two or more areas having the largest increase in a total shade value after the camera is activated among the plurality of areas as the starting area group. According to claim 6,
The plurality of areas,
A parking brake releasing method configured in a quadrant shape. According to claim 1,
The camera includes a rear camera, parking brake release method. A computer readable recording medium recording a program for executing the parking brake releasing method according to any one of claims 1 to 9. Electronic Parking Brake (EPB);
a camera that is activated when a specific condition is satisfied in a state in which the electronic parking brake is engaged and photographs the exterior of the vehicle; and
A controller for determining whether the image input through the camera corresponds to a preset first pattern set, and controlling the electronic parking brake to be released if the image corresponds to the first pattern set as a result of the determination, automobile. According to claim 11,
Further comprising a sensor for detecting at least one of shock and vibration applied to the vehicle in a state in which the ignition is turned off,
The control unit,
and activating the camera when at least one of the sensed shock and vibration matches a preset second pattern set. According to claim 11,
The first pattern set,
An automobile comprising a plurality of patterns having an input sequence. According to claim 13,
The control unit,
Filtering the image input through the camera with respect to a shadow value, and determining a plurality of input patterns sequentially input based on a change in a total value of shadow over time in the filtered image. According to claim 14,
The control unit,
and determining whether the plurality of input patterns sequentially input are the same as the plurality of patterns included in the first pattern set. According to claim 14,
The control unit,
For each of the plurality of input patterns sequentially input,
A total value of shadows of the filtered image is determined for each of a plurality of regions, a start region group and an end region group are determined based on the total value of shadows determined for each region, and among a plurality of preset pattern types, the start region group and determining a pattern corresponding to the end region group. According to claim 16,
The control unit,
Wherein two or more areas having the largest increase in a total shadow value after the camera is activated among the plurality of areas are determined as the start area group.

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