KR20120024225A - Auto-control system of car seat using the image information which corresponds in body condition of the passenger - Google Patents

Abstract

The present invention relates to an automatic seat control system, and more particularly, to acquire the physical condition of a passenger riding in a vehicle by using an image photographing unit, and using this image information to determine the optimal position of a seat considering safety and convenience when driving a vehicle. The present invention relates to an auto seat adjustment system that adapts to a passenger's physical condition using image information that further improves the safety and convenience of an occupant in a vehicle by automatically adjusting the car seat to an optimal state after derivation. .
According to the present invention, the image pickup unit for photographing the physical characteristics of the occupant sitting on the seat; An image processor which analyzes the image collected by the image photographing unit and calculates four types of body information of the occupant; A seat control information look-up table (LUT) for calculating an optimal seat position based on the occupant body information calculated by the image processor and a control unit for controlling operations of six motors mounted on the seat. Auto seat control system is provided.

Description

Auto-control system of car seat using the image information which corresponds in body condition of the passenger}

The present invention relates to an automatic seat control system, and more particularly, to acquire the physical condition of a passenger riding in a vehicle by using an image photographing unit, and using this image information to determine the optimal position of a seat considering safety and convenience when driving a vehicle. The present invention relates to an auto seat adjustment system that adapts to a passenger's physical condition using image information that further improves the safety and convenience of an occupant in a vehicle by automatically adjusting the car seat to an optimal state after derivation. .

In general, the seat of the vehicle is fixed and mechanically manipulated to adjust to the physical condition of the occupant.In some vehicles, by mounting a motor in the driver's seat or the passenger seat and controlling each motor using a switch. It allows the passenger to manually adjust the car seat to the optimal position.

This often happens in the passenger seat where passengers change frequently, and most of the passengers do not know the exact standard position of the car seat for safety.

In other words, in the case of a traffic accident of a light contact accident level of a slight breakage of the vehicle, the situation is seriously caused by a shock to the occupant due to the wrong position of the car seat.

In particular, the situation where the wrong position of the neckrest of the seat leads to a serious injury to the neck, and the situation where the car is passed over the backrest of the seat from the passenger seat while sleeping, leading to a death accident are caused by the problem of the adjustment of the car seat. However, it can be said to be an important problem to be solved.

In order to solve the above problems, the present invention is to take the image of the vehicle occupant and to analyze it so that the optimal seat position can be automatically adjusted, the purpose is to increase the safety and convenience of the vehicle occupant while driving. .

In order to achieve the above object, the present invention includes an image photographing unit for photographing the physical characteristics of the occupant sitting on the seat; An image processor which analyzes the image collected by the image photographing unit and calculates four types of body information of the occupant; And a control unit for controlling the operation of six motors mounted on the seat and a seat control information look-up table (LUT) for calculating an optimal seat position based on the occupant body information calculated by the image processor. It provides a car seat automatic control system is configured.

The information obtained from the image capturing unit may be imaged to calculate the hip and shoulder length, the hip and knee length, the knee and foot length, the shoulder and the head length among the body information of the occupant.

Combination of the four occupant body information collected to adjust the adjustment information for driving the six motors mounted on the seat for adjusting the front and rear position, the angle of the backrest, the height of the backrest, the height of the front and rear seats It can be moved automatically by referring to the lookup table that stores the optimal position based on safety and convenience in advance.

The function of moving to the basic position of the car seat or the optimal position when boarding may determine whether the occupant is seated using information recorded in real time using a camera.

After the vehicle seat is moved to a position optimized for the occupant, a driver may be provided to warn of the infringement of safety when the occupant arbitrarily manipulates the seat while the vehicle is in operation.

As described above, the present invention is an apparatus for automatically adjusting the vehicle seat to an optimal position while driving in accordance with the physical condition of the occupant, thereby increasing the safety and convenience of the occupant.

In addition, the present invention has the effect of increasing the safety by preventing the secondary damage in the event of a traffic accident by notifying the occupant of the warning when the occupant changes the car seat while driving.

1 is an exemplary view of a passenger car seat to which the present invention is applied.
Figure 2 is a block diagram showing an automatic seat adjustment system adapted to the physical condition of the passenger using the image information according to the present invention.
Figure 3 is a flow chart showing the operation of the auto seat adjustment system.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Auto seat adjustment system using the image information according to the present invention includes an image taking unit (1) for photographing the body features of the occupant sitting on the seat as shown in FIG. An image processor (2) which analyzes the image collected by the image photographing unit (1) and calculates four kinds of body information of the occupant; The seat control information look-up table (LUT) 3 for calculating an optimal seat position based on the occupant body information calculated by the image processor 2 and the operation of six motors mounted on the seat Control unit (not shown in the figure) for controlling.

The image capturing unit 1 serves to photograph the body of the occupant sitting on the seat. For this purpose, the image capturing unit 1 may be installed at the front and the upper part of the occupant. The image capturing unit 1 may use a CCD or CMOS camera for capturing the physical condition of the occupant, and the upper part of the inside of the vehicle door, the rearview mirror, the seat so that the moving occupant can open the door of the vehicle and photograph the seating process in real time. Can be installed on top of windshield Of course, any position may be used as long as it can photograph the physical condition of the occupant.

The image processor 2 calculates four kinds of information of the occupant, hip and shoulder length, hip and knee length, knee and foot length, shoulder and head length by using the information obtained by the image photographing unit 1. The four pieces of information may be calculated by extracting the boundary information of the passenger from the image information input in real time from the image capturing unit 1 and selecting a still image at a predetermined time interval.

For example, after calculating the boundary information of the occupant in the still images extracted at the predetermined time intervals, in order to measure the length between the hips and shoulders, a line connecting the left and right shoulders is drawn, and the pelvis is parallel to the shoulder line that has already been set. Draw a line from side to side, calculate the center point of the two segments, calculate the Euclidean distance between the two points, and average the distance information from several still images until the occupant is seated. You can extract the length between your hips and shoulders.

In the above-described calculation method, the left and right reference points for drawing the shoulder line are selected from the boundary information and the center point of the curved section that forms the shoulder line is calculated, and then the coordinates of the upper left of the passenger still image pixel (Pixel) Is (0,0) and the Euclidean distance is calculated using the x and y coordinate values of the two points as shown in Equation 1.

Equation 1

In addition, as a method for selecting the shoulder line from the boundary information, as shown in Equation 2, the center point is obtained using the coordinate values of the start point and the end point of the curved section forming the shoulder line, and then the center point information and the equation 1 are obtained. One of the curves that form the shoulder line closest to the Euclidean distance by the start and end of the shoulder line, and the center point from the two lines connecting the left and right shoulders and the pelvis can also be calculated using Equation 2. have.

Equation 2

,

,

Problems that should be determined in the above calculation method may include an error of distance information due to the magnification and distortion of the camera in the still image of the passenger input in real time, and the magnification and the wide angle lens of the camera used in the image capturing unit 1 In consideration of the information, the compensation value is applied to the final distance information to obtain accurate body information.

As a method of determining whether or not the occupant is seated through the operation of the image processor 2, the seat is in a basic position where the occupant is easy to sit at the time when the occupant opens the car door and is seated. In the fixed position and in the process of extracting the boundary line, it is determined that the seating point is completed when the shoulder line overlaps with the boundary line information of the occupant's body. In addition, it is also possible to select a time point at which a predetermined portion of the seat information known in advance is occluded by the occupant, and seating can be determined even when the line segments for calculating the above-mentioned body information are aligned.

Seat adjustment information lookup table (3) is a position information table prepared in advance by selecting the optimal position of the seat in response to the passenger's body information of various conditions and taking into account the safety and convenience when driving the car. It contains six pieces of information that correspond to position, backrest tilt, waistrest height, seat front and rear height, and neckrest height.These information is used to control the stepping motor mounted on the seat. Use as data.

The controller controls the stepping motor mounted on the seat by using the four body information of the occupant and the six data of the seat control information lookup table 3 calculated by the image processor 2, and specifically, the seat. The overall fore and aft position is determined by the hip and knee length, and the waist and height of the backrest are calculated based on the hip and shoulder length, the front and rear height of the seat and the knee and foot length, and the neckrest height and shoulder and head length. Each position information controlled by the stepping motor may be made in stages corresponding to body information.

The following is an embodiment with reference to FIG. 3.

First, the seat is optimal when the person gets on and the door is closed.

If the door is open, the seat is moved to the rear most easily to get on and off.

In addition, if a person is not burning while driving, the seat is placed in the default position of the intermediate position.

The seat default condition is to place the seat in the middle position when there are no people, and the seat initial condition is to put the seat at the back to make it easier to get on and off when a person gets on and off. To adjust the sheet.

At this time, the camera judgment refers to judging whether or not there is a person, and the door judgment is to determine whether the door is opened or closed.

Body feature analysis is to determine the body features by using the image processing of the camera, the seat optimal information table is a standardized optimal riding state data table according to the characteristics of the human body, the body optimal state derivation is the data corresponding to the analyzed body features It is to adjust the sheet to the optimal state by deriving from the optimal information table.

Hereinafter, with reference to Figure 2 looks at the operation of the auto seat adjustment system adapted to the physical condition of the occupant according to the present invention.

First, when the occupant opens the door with the start of the system, the seat driving unit moves the seat to a position where the occupant is comfortable to ride, and the image capturing unit 1 starts capturing the body of the occupant to inform the image processing unit 2. Send it.

The image processor 2 calculates four pieces of information corresponding to hip and shoulder length, hip and knee length, knee and foot length, and shoulder and head length by using a still image capable of calculating physical conditions.

In addition, the image processor 2 determines seat adjustment information with reference to the seat adjustment information lookup table 3 based on the four body information at the time when the occupant is completed, and then mounts the seat using the seat driver. The stepping motor is driven to the seat optimal position for the occupant.

If the occupant opens and lowers the door after the operation is completed, the image processing unit 2 determines whether the door is occupied and whether the occupant is seated, and moves the seat back to the basic position by the seat driving unit, and the system enters the initial state and enters the next boarding. Repeat the process until wait.

1: Image capturing unit 2: Image processing unit
3: Seat adjustment information lookup table

Claims (5)

An image capturing unit (1) for photographing the physical characteristics of the occupant sitting on the seat; An image processor (2) which analyzes the image collected by the image photographing unit (1) and calculates four kinds of body information of the occupant; The seat control information look-up table (LUT) 3 for calculating an optimal seat position based on the occupant body information calculated by the image processor 2 and the operation of six motors mounted on the seat Automobile seat automatic control system comprising a control unit for controlling. The body information of the occupant calculated from the image capturing unit 1 is hip and shoulder length, hip and knee length, knee and foot length, shoulder and head length, and the body information is obtained from a camera. Auto seat system, characterized in that the calculated after processing the image information. The seat mounted on the seat for adjusting the front and rear positions, the backrest tilt, the waistrest height, the height of the front and rear of the seat portion, and the neckrest height of the entire seat by combining four collected occupant body information. An automatic seat control system comprising a control unit for automatically moving control information for driving two motors with reference to a seat position lookup table (3) having previously stored an optimum position based on safety and convenience. According to claim 2, wherein the information is recorded in real time using the camera to determine whether the occupant is seated in the car seat if there is no afterwards to move to the basic position so that the occupant can easily be seated and the physical condition after sitting Auto seat system, characterized in that the image processing unit (2) to move to the optimum position. The method according to claim 1, wherein the vehicle seat is moved to a position optimized for the occupant, and when the occupant arbitrarily manipulates the seat while the vehicle is in operation, the vehicle seat is warned of an infringement of safety, thereby notifying a change of the occupant's correct posture. Auto seat control system characterized in that.

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