KR20200072998A - Vehicle and method for disengaging brake - Google Patents

Abstract

The present invention relates to a vehicle capable of disengaging a parking brake from the outside and a method for performing the same. A method of disengaging a parking brake according to one embodiment of the present invention can include the following steps of: activating a camera for photographing the outside of a vehicle while an electronic parking brake (EPB) is engaged; determining whether or not an image inputted through the camera corresponds to a preset first pattern set; and disengaging the electronic parking brake when the image corresponds to the first pattern set as a result of the determination.

Description

VEHICLE AND METHOD FOR DISENGAGING BRAKE

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

In order to prevent the vehicle from moving during parking, a typical vehicle uses a P-gear fastening and a parking brake. Here, the P stage uses a parking sprag of the drive shaft, and the parking brake is usually applied by physically pulling a wire to operate the drum brake. For the operation of the drum brake, it is also called a side/hand brake, or a pedal-type hand brake, depending on the position of the operation means for mechanically pulling 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 has stopped. 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 spaces and often lack even ground parking spaces, so double or triple parking frequently occurs depending on the time of day. In the case of double parking, it is common to place the transmission in the N-stage and release the parking brake to leave the vehicle in a state where it can be moved by external force. However, as described above, according to the auto-hold function, the electronic parking brake is automatically engaged when parking, but the driver often does not recognize the parking brake himself, so the driver often does not recognize it and leaves only the transmission in the N-stage. Therefore, even if the transmission state is neutral, the parking brake causes the vehicle to be unable to move, and other drivers have a problem in that the driver of the vehicle must be called into the parking lot.

The present invention is to provide a vehicle 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 that are not mentioned will be clearly understood by those skilled in the art from the following description. 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 the steps of activating a camera for photographing the exterior of a vehicle while an electronic parking brake (EPB) is engaged; Determining whether an image input through the camera corresponds to a preset first pattern set; And when the determination result corresponds to the first pattern set, releasing the electronic parking brake.

In addition, the vehicle according to an embodiment of the present invention, an electronic parking brake (EPB); A camera that is activated when a specific condition is satisfied while the electronic parking brake is engaged and photographs the exterior of the vehicle; And a controller configured to determine whether an image input through the camera corresponds to a preset first pattern set, and to control the electronic parking brake to be released when the determination result corresponds to the first pattern set. Can.

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

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art from the following description. 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 EPB release of a vehicle according to an embodiment of the present invention.
4 shows an example of an input image filtering process according to an embodiment of the present invention.
5 shows a pattern recognition pattern according to a shadow 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, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated. In addition, parts indicated by the same reference numbers 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 predetermined pattern is recognized through the image recognition means for acquiring an image outside the vehicle. It is proposed to enable the parking brake to be released outside the vehicle without manipulation inside the vehicle.

According to an aspect of the present embodiment, the image recognition means for acquiring an image outside the vehicle may be a rear camera, and an image of a preset pattern may be a shadow change that occurs as a user passes through the rear camera in close contact with a finger or the like. The set pattern can be set by the driver.

In addition, according to an aspect of the present embodiment, the image recognition means may be vibration or impact of a specific pattern applied to the vehicle.

Hereinafter, a vehicle structure for performing the present 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 further include an audio/video/navigation (AVN) system 11, a camera 12, and a sensor 13, and the control unit 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 will be described.

The AVN system 11 may receive a pattern to be input to the camera 12 from the driver to release it when the EPB 31 is fastened, and the received 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 ignition is turned off, and in the wakeed-up state, an external image may be received and transmitted to the image processing controller 22. 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 photographs a rear image of the vehicle for convenience. .

The sensor 13 may detect an impact/vibration or a movement/acceleration of the vehicle body applied to the vehicle body from the outside, and may transmit it 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 limited thereto, and at least the impact recognition controller 23, If the image processing controller 22 and the EPB 31 can be controlled, any controller 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 the camera activation signal is received from the shock recognition controller 23 while the engine is turned off. At this time, the body controller 21 may operate an external output means (eg, a head lamp, a direction indicator light, a horn, an external speaker, etc.) in a predetermined form in order to inform the activation of the camera 12 to the outside. Thereafter, when the EPB release signal is received from the image processing controller 22, the EPB 31 may 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 corresponding image from the EPB It is determined whether or not it matches the pattern information for, and if it matches, the EPB release signal may be transmitted to the body controller 21. According to an embodiment, the image processing controller 22 may be an ADAS controller or may be implemented as a function of the AVN system 11, but is not limited thereto.

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

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

Of course, the above-described configuration shows only the configuration related to the present embodiment, and it is apparent to those skilled in the art that the actual vehicle may include more or less components depending on the 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 to (a) of FIG. 2 first, when a driver of a vehicle according to an embodiment calls a pattern input menu for EPB release through a predetermined menu operation, four points 210 are displayed on the display of the AVN system 11. , 220, 230, 240) may be displayed. In this state, the user can input a pattern for EPB release by connecting two different points in the horizontal direction or the vertical direction. At this time, the AVN system 11 can recognize only a pattern type (for example, a horizontal pattern or a vertical pattern) of a predetermined type, and when another type of pattern type (for example, a diagonal pattern) is input, re-enter 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 all patterns constituting the pattern set may be sequentially recognized without missing, so that EPB release can be performed.

For example, as shown in (b) of FIG. 2, a touch input starting from the upper point 210 and ending at the lower point 230 may be referred to as a first pattern, and in the opposite direction to that of FIG. 2(b) (ie, Lower->Up) The input touch input can be referred to as a second pattern.

Similarly, as shown in (c) of FIG. 2, the touch input starting from the left point 220 and ending at the right point 240 may be referred to as a third pattern, and in the opposite direction to that of FIG. 2(c) (ie , Right->Left) The input touch input can be referred to as the fourth pattern. After all, 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 point illustrated in FIG. 2 are also exemplary, and it is needless to say that a pattern may be input through a display object having a different number, location, 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, not the display of the AVN system 11.

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

In FIG. 3, a pattern set for EPB release is stored in advance through the same process as in FIG. 2, and a shock/vibration pattern for activating the camera is also pre-determined (eg, input by a driver or by a manufacturer when a vehicle is shipped). do. In addition, this vehicle is a situation where the transmission is double-parked in the N-stage state or the EPB is engaged, and another driver calls the driver of the vehicle to request the vehicle to move. At this time, the driver of the vehicle can inform the other driver of the shock/vibration pattern for activating the camera and the pattern set for EPB release over the phone. Accordingly, another driver may first input a shock/vibration pattern for activating the camera to the vehicle (for example, by pushing the bonnet once and then tapping the bonnet three times) (S310).

The shock/vibration is sensed by the sensor 13, and the shock recognition controller 23 determines whether it is the same as a pattern for preset camera activation (on) (S320), and if the determination result is the same, the camera activation signal 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 for EPB release (S330), and activates a predetermined external output so that another driver knows that the camera is activated. It can be made (S340). For example, the predetermined external output may be a form in which a beep sound is output together with an emergency light once, or a general hazard, but is not limited thereto.

The camera 12 maintains an on state until the time T elapsed from the activated time 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 the image input through the camera will be described with reference to FIGS. 4 to 6.

4 is an example of an input image filtering process according to an embodiment of the present invention, FIG. 5 is a pattern recognition form according to a shadow value based on the input image filtered through the process of FIG. 4, FIG. 6 is a view of the present invention 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 while the rear camera is activated inputs a pattern by sliding a finger close to the rear camera.

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

At this time, filtering may be performed based on the shadow value to improve the efficiency of image recognition. For example, a shaded value corresponding to a portion covered by a finger may be selected as a reference shaded value in order to extract a portion where a finger passes through the camera image data. The reference shaded value is selected as a filter to interrupt the image of FIG. 4. As shown in FIG. 4, the simplified image may be simplified and matrixed as shown in FIG. 4.

Meanwhile, the simplified image may be interpreted as a pattern through quadrant division. For example, as shown in the middle left of FIG. 4, when the upper right of the simplified image is a first quadrant, the upper left is a second quadrant, the lower left is a third quadrant, and the lower right is a quadrant, the third pattern is 2/3 at the time t. Shading data begins to increase in the quadrant. Then, at t+1 time point, almost all data in the 2/3 quadrant represents the shade value, and the shade value starts to be generated in the quarter quadrant. In addition, at t+2, the shade value of the 2/3 quadrant is reduced, and the shade value of the 1/4 quadrant is at its maximum. Afterwards, at T+3, the 2/3 quadrant shadow value disappears, and only the 1/4 quadrant shadow value remains. The graph according to the change in time t with respect to the sum (∑: SUM) of the shaded values using the quadrant division may be arranged as shown in FIG. 5.

Based on the characteristics of the total change of the shade values over time for each pattern, an input pattern may be determined according to an order as shown in FIG. 6.

Referring to FIG. 6, the image processing controller 22 may filter the image captured through the camera 12 to determine the starting quadrant group based on the sum of shades (∑) for each quadrant (S601). . Here, the starting quadrant group may mean two quadrants having the highest increase in the sum of the most shaded values since the camera is activated.

For example, if the pattern input by the person attempting to release the EPB is the third pattern, the 2/3 quadrant becomes the starting quadrant group. As the pattern input proceeds, the total sum of the shades of the starting quadrant group will gradually increase, and the image processing controller 22 checks the total sum of the shadows of the starting quadrant group (S602), and the maximum value is the maximum of the starting quadrant group. The value M_1 may be stored (S603).

Subsequently, when the first time a1 elapses, the image processing controller 22 determines whether the total sum of shades of the ending quadrant group increases (S604), and if increased, the starting quadrant group as the second time (a2) elapses It is determined whether or not the total shaded value of is decreased (S605). Here, the ending quadrant group may mean two remaining quadrants located in opposite directions of the starting quadrant group, that is, excluding the starting quadrant group. That is, when a person who wishes to release the EPB from the outside of the vehicle correctly inputs a specific pattern, the finger started in the starting quadrant group moves toward the ending quadrant group and disappears from the ending quadrant group. In addition, the first time (a1) refers to the time when the first finger reaches the end quadrant experimentally (ie, the time at which the shadow value of the end quadrant starts to increase) when the camera 12 is passed by the finger. The second time (a2) may mean the time at which the shadow value of the starting quadrant experimentally starts to decrease when swiping with a finger.

When the total shaded value of the ending quadrant group increases while the total shaded value of the starting quadrant group decreases, it may mean that the finger moves in a certain direction, so the image processing controller 22 sets the shaded total value of the ending quadrant group. By checking (S606), the maximum value (M_2) may be stored (S607).

The image processing controller 22 may multiply the maximum total shaded value M_2 of the ending quadrant group by a predetermined ratio (r%) and compare it with the maximum shaded sum value M_1 of the starting quadrant group (S608). In this case, the ratio value r may mean an effective ratio of the maximum shadow value M_2 of the ending quadrant group to be measured later with respect to the maximum total sum shadow M_1 of the starting quadrant group experimentally measured. This is because a finger similar to the M_1 value must be measured at the M_2 value to determine the movement of the finger.

As a result of comparison, when the value of M_1 is larger, the image processing controller 22 checks the total sum of the shadows of the ending quadrant group (S609), and the shadow total value of the ending quadrant group decreases after the third time (a3) has elapsed. If it is, it may be determined that the pattern input through the finger is finished (S610). Here, the third time (a3) may mean the time at which the shadow value of the ending quadrant group starts to decrease when it is swiped with a finger.

Thereafter, when the total sum of the shades of all the quadrants is equal to or less than an appropriate value (OFF) to determine that there are no fingers (S611), the image processing controller 22 determines that the pattern starting from the starting quadrant group and pointing toward the ending quadrant group is input. It can be (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, a process of determining whether the image processing controller 22 corresponds to the pattern set by receiving the individual patterns and releasing the EPB will be described with reference to FIG. 7. 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 the 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 or more patterns (i.e., n+1) of patterns are completed (S740), the image processing controller 22 It is determined whether the pattern set consisting of the n-th 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 having a predetermined 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 first pattern to the nth pattern is the same as the pattern set for EPB release when the n+1th pattern matches the pattern indicating that the pattern set input is finished. It can be configured to determine.

As a result of the determination, when the pattern set is the same, the image processing controller 22 transmits an EPB release signal to the body controller 21, and the body controller 21 releases the EPB 31 and sets a preset for notifying the outside. A form of external output (eg, two hazardous outputs) may be performed (S760).

On the other hand, in preparation for an error with respect to the pattern input, the image processing controller 22 may increase the count by 1 when there is a pattern set mismatch, and reset (T=0) the determination result of the stored individual pattern (S770). At this time, a predetermined external output (eg, one horn output) may occur in order to notify 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 EPB release is not received (S790).

According to the above-described embodiments, when the vehicle owner is unable to respond to the EPB release request of another person in a situation where the car cannot be moved due to the EPB lock during dual parking in an urban construction apartment such as Seoul, the pattern for EPB release according to the present invention If the set is notified to others, the EPB can be released even in the absence of the vehicle owner. Therefore, not only inconveniences among residents, but also inconveniences of the vehicle owner can be eliminated.

The present invention described above can be embodied as computer readable codes on a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data readable by a computer system is stored. Examples of computer-readable media include a hard disk drive (HDD), solid state disk (SSD), silicon disk drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. There is this.

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

Claims (17)

Activating a camera that photographs the exterior of the vehicle while the electronic parking brake (EPB) is engaged;
Determining whether an image input through the camera corresponds to a preset first pattern set; And
And when the determination result corresponds to the first pattern set, releasing the electronic parking brake. According to claim 1,
Further comprising the step of detecting at least one of the shock and vibration applied to the vehicle when the ignition is off,
The activated step,
When at least one of the sensed shock and vibration coincides with a preset second pattern set, the parking brake release method. 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,
Determining whether or not to correspond 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 the shadows over time in the filtered image. According to claim 4,
Determining whether or not to correspond to the preset first pattern set,
And determining whether the plurality of input patterns sequentially input is the same as the plurality of patterns included in the first pattern set. According to claim 4,
The determining of the plurality of input patterns sequentially input may include: for each of the plurality of input patterns;
Determining a total sum of shades of the filtered image for each region;
Determining a start region group and an end region group based on the total sum of shades determined for each region; And
And determining a pattern corresponding to the start region group and the end region group among a plurality of preset pattern types. The method of claim 6,
Determining the start zone group and end zone group,
And determining, as the starting area group, two or more areas having the largest increase in the total amount of shadows since the camera is activated among the plurality of areas. The method of claim 6,
The plurality of regions,
Method of releasing the parking brake, consisting of a quadrant shape. According to claim 1,
The camera, comprising a rear camera, parking brake release method. A computer-readable recording medium recording a program for executing the parking brake release 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 while the electronic parking brake is engaged and photographs the exterior of the vehicle; And
And a controller configured to determine whether an image input through the camera corresponds to a preset first pattern set, and to control the electronic parking brake to be released when the determination result corresponds to the first pattern set, car. The method of claim 11,
Further comprising a sensor for detecting at least one of shock and vibration applied to the vehicle in the state that the engine is off,
The control unit,
A vehicle that activates the camera when at least one of the sensed shock and vibration matches a preset second pattern set. The method of claim 11,
The first pattern set,
A vehicle comprising a plurality of patterns having an input sequence. The method of claim 13,
The control unit,
A vehicle that filters the image input through the camera with respect to a shadow value, and determines a plurality of input patterns sequentially input based on a change in the total value of the shadow over time in the filtered image. The method of claim 14,
The control unit,
A vehicle for determining whether the plurality of input patterns sequentially input is the same as the plurality of patterns included in the first pattern set. The method of claim 14,
The control unit,
For each of the plurality of input patterns sequentially input,
The total sum of the shades of the filtered image is determined for each region, and a start region group and an end region group are determined based on the total sum of the shades determined for each region. A vehicle for determining a pattern corresponding to the end region group. The method of claim 16,
The control unit,
A vehicle in which two or more areas having the largest increase in the total amount of shadows since the camera is activated, are determined as the starting area group.

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