KR102371006B1 - Device and method for controlling seat of vehicle - Google Patents

Abstract

When the driving mode of the vehicle is switched from the normal mode to the sports mode, it is possible to provide an optimized hugging feeling to the driver and passengers through control of the seat position and bolster shape change control, thereby providing a satisfactory seat seating feeling to the driver At the same time, it is intended to provide a seat control device and method for a vehicle that can provide satisfactory driving stability and driving stability.

Description

DEVICE AND METHOD FOR CONTROLLING SEAT OF VEHICLE

The present invention relates to an apparatus and method for controlling a seat for a vehicle, and more particularly, when the driving mode of the vehicle is changed from a normal mode to a sport mode, hugging optimized for a driver and passengers through control of changing a seat position and a bolster shape It relates to a seat control apparatus and method for a vehicle that can provide a feeling.

The driving mode of the vehicle includes an eco mode and a sport mode in addition to the basic normal mode in consideration of the current driving environment and the driving tendency of the driver.

The eco-mode refers to a driving mode that helps to improve fuel efficiency by controlling engine RPM to reduce acceleration capability while maintaining engine RPM at an appropriate level.

In particular, the sport mode increases the instantaneous acceleration by delaying the shift timing to utilize the high RPM of the engine, and makes the throttle valve respond faster so that the engine responds sensitively even when the accelerator pedal is operated less, thereby providing a dynamic driving sensibility to the driver. driving mode that provides

For each of these driving modes, the driver not only feels different driving sensibility, but also feels a different feeling of sitting in the seat.

For example, when turning while driving a vehicle, the driver's body is tilted toward the generation of centrifugal force and inertia, and the degree of body tilt is inevitably different for each driving mode, and in particular, the body tilt phenomenon in sports mode is more severe. do.

However, as the position and shape of the seat are maintained regardless of the driving mode of the vehicle, the driver is inevitably dissatisfied with the seat seating feeling. This may further exacerbate dissatisfaction with seat comfort, which in turn may lead to deterioration of driving stability and driving stability due to instability in driving posture.

The present invention has been devised to solve the above problems, and when the driving mode of the vehicle is switched to the sports mode, it is possible to provide an optimized hugging feeling to the driver and passengers through the control of the seat position and the bolster shape change control. An object of the present invention is to provide an apparatus and method for controlling a seat for a vehicle that can provide satisfactory driving stability and driving stability while providing a satisfactory seat feeling to a driver.

One embodiment of the present invention for achieving the above object is: a body pressure measuring sensor mounted on a seat back to measure the body pressure of the driver, and a measuring unit including a tilt measuring sensor mounted on the seat back to measure the inclination of the seat back ; a driving mode determining unit for determining a current driving mode; The hugging feeling scale is calculated based on the body pressure information from the measurement unit, and the hugging feeling of the mid-back and back-side parts of the driver's body in the normal mode using the calculated hugging feeling scale. a hugging feeling determining unit that calculates the degree as a numerical value; When the current driving mode is determined as the sports mode, the hugging feeling of the mid-back and back-side in the normal mode provided from the hugging feeling determining unit is adjusted to the target level for the hugging feeling in the sports mode. a hugging feeling analysis unit that changes and sets; and a seat control unit configured to adjust a seat back angle and a seat back bolster volume according to the hugging feeling in the normal mode provided by the hugging feeling determining unit and the hugging feeling in the sports mode provided by the hugging feeling analyzing unit. It provides a seat control device for a vehicle, characterized in that it is configured to include.

The body pressure sensor is embedded between the seat back cover and the foam pad, and is provided in a structure in which body pressure sensors are attached in a 3×3 arrangement on a flexible mat, and is built in a pair at the top, middle, and bottom positions in the front center of the seat back. It consists of a first body pressure sensor to be used, and a second body pressure sensor to be installed in the upper, middle, and lower positions of the bolsters on both sides of the front side of the seat back, each having a structure in which the body pressure sensors are attached to a flexible mat in a 2×3 arrangement. do it with

In addition, the inclination sensor is embedded in a predetermined position of the seat back and is characterized in that it is adopted as a kind of MEMS sensor that measures seat back angle information in the normal mode and the amount of change in the seat back angle in the sports mode.

In addition, the measurement unit is characterized in that it further includes a height sensor mounted on the front and rear suspension to obtain the current inclination information of the vehicle.

The driving mode determining unit determines the current driving mode of the vehicle as a normal mode or a sports mode based on a driving mode selection signal from a driving mode switch or driving information from a navigation system having GPS.

Preferably, the driving mode determining unit determines whether the current driving mode is a normal mode or a sports mode using driving information from the navigation in a state where the auto driving switch is turned on, but the vehicle speed is greater than or equal to the threshold speed and the traffic condition is smooth And when rain information is not received, the current driving mode is determined as the sports mode, and when the vehicle speed is less than a threshold speed, the traffic condition is not smooth, or rain information is received, the normal mode is determined.

The hugging feeling scale calculated by the hugging feeling determination unit is calculated using body pressure information from the measuring unit, and it is characterized in that it is determined by the ratio of body pressure generation and the degree of unequal body pressure generation in the middle and back of the driver's body.

Preferably, the body pressure generation ratio is calculated as a ratio of a body pressure sensor that generates an actual body pressure detection signal to a total body pressure sensor that can come in contact with the middle of the driver's body, and the degree of unequal body pressure generation is determined to be in contact with the driver's back side It is characterized in that it is calculated using the coefficient of variation (standard deviation/average) method for the body pressure sensing variation of the total body pressure sensor.

The seat back angle is adjusted by the electric reclining device according to the control signal of the seat controller, and the seat back bolster volume is characterized in that it is adjusted through pneumatic control of a plurality of air cells built in the bolster.

The seat control apparatus of the present invention detects the driver's eye point before and after the seat back angle adjustment, and transmits a signal for returning the eye point after the seat back angle adjustment to the eye point before the seat back angle adjustment to the seat control unit. It characterized in that it further comprises an eye tracking device so that the X-axis and Z-axis position adjustment of the seat cushion is made.

Another embodiment of the present invention for achieving the above object includes: i) measuring the body pressure of the driver with a body pressure sensor mounted on a seat back; ii) determining whether the current driving mode is a normal mode or a sports mode in the driving mode determining unit; iii) The hugging feeling determination unit calculates a hugging feeling scale based on the body pressure information from the measurement unit, and using the calculated hugging feeling scale, the mid-back and back side parts of the driver's body in normal mode ( calculating the degree of hugging feeling in a numerical value; iv) If the current driving mode is determined to be the sports mode, the hugging feeling analysis unit calculates the hugging feeling of the mid-back and the back-side in the normal mode provided from the hugging feeling determining unit in the sports mode. setting a change to a target level for hugging feeling in mode; and v) adjusting the seat back angle and seat back bolster volume by the seat control unit according to the hugging feeling in the normal mode provided by the hugging feeling determining unit and the hugging feeling in the sports mode provided by the hugging feeling analyzing unit. ; It provides a seat control method for a vehicle, characterized in that it comprises a.

In step ii), the driving mode determining unit determines whether the current driving mode is the normal mode or the sports mode using the driving information from the navigation while the auto driving switch is turned on, but the vehicle speed is above the threshold speed and the traffic state It is characterized in that the current driving mode is determined as the sport mode when the vehicle is smooth and rain information is not received, and the normal mode is determined when the vehicle speed is less than a critical speed, the traffic condition is not smooth, or rain information is received.

In step iii), the hugging feeling scale is calculated using body pressure information from the measurement unit, and it is characterized in that the ratio of body pressure generation and the degree of unequal body pressure generation in the middle and back of the driver's body.

Preferably, the body pressure generation ratio is calculated as a ratio of a body pressure sensor that generates an actual body pressure detection signal to a total body pressure sensor that can come in contact with the middle of the driver's body, and the degree of unequal body pressure generation is determined to be in contact with the driver's back side It is characterized in that it is calculated using the coefficient of variation (standard deviation/average) method for the body pressure sensing variation of the total body pressure sensor.

In step iii), after obtaining the current inclination information of the vehicle from the height sensor mounted on the front and rear suspension of the vehicle in the hugging feeling determining unit, and determining that the vehicle is going downhill or uphill, It is characterized in that the degree of hugging feeling is calculated as a numerical value in consideration of the increase and decrease in body pressure of the driver's mid-back and back-side.

In step v), the seat back angle is adjusted by an electric reclining device that receives a signal from the seat controller, and the seat back bolster volume is adjusted by pneumatic control of a plurality of air cells built in the bolster. do.

In addition, the seat control method of the present invention includes: detecting a driver's eye point before adjusting the seat back angle in the eye tracking device before step v), and after adjusting the seat back angle in the eye tracking device after step v) detecting the driver's eye point of the vehicle; transmitting a signal for returning the eye point after the seat back angle adjustment to the eye point before the seat back angle adjustment to the seat control unit; The method further includes the step of returning the driver's eye point to the eye point before the seat back angle adjustment by adjusting the X-axis and Z-axis positions of the .

Through the above-described problem solving means, the present invention provides the following effects.

First, it is possible to provide an optimized hugging feeling to the driver and passengers by controlling the seat position and the bolster shape change in the normal mode and the sports mode among the driving modes of the vehicle.

Second, due to the optimal hugging feeling that the seat stably wraps around the driver, the driver can feel the seat sitting feeling as if riding in a sports car, especially in sports mode, thereby providing stable and dynamic driving control and driving stability can do.

Third, when turning while driving the vehicle, the driver's body is tilted in the direction of generation of centrifugal force and inertia. there is.

1 is a configuration diagram showing a seat control device for a vehicle according to the present invention;
2 is a schematic view showing a structure in which a body pressure measuring sensor of the seat control device for a vehicle according to the present invention is built into the seat;
3 is a schematic view showing a seat back tilt measuring sensor included in the measuring unit of the seat control device for a vehicle according to the present invention;
4 is a schematic view showing a vehicle inclination sensor mounting position included in the measurement unit of the seat control device for a vehicle according to the present invention;
5 is a flowchart showing a driving mode determination process of a driving mode determining unit of the seat control device for a vehicle according to the present invention;
6 is a schematic view showing a body part for optimally determining the hugging feeling that the seat wraps around the passenger's body;
7A and 7B show the correlation between the body pressure generation ratio calculated by the hugging feeling determination unit of the seat control device for a vehicle according to the present invention and the hugging feeling level (hugging feeling score) calculated by the hugging feeling determination unit compared to the body pressure unequal level. illustrated graph,
8 is a diagram illustrating an example of calculating the degree of hugging feeling (hugging feeling score) in the normal mode and the hugging feeling degree (hugging feeling score) in the sports mode by the hugging feeling determination unit of the seat control device for a vehicle according to the present invention. example,
9 is a schematic view showing an example in which the angle of the seat back is adjusted by the seat control unit of the seat control device for a vehicle according to the present invention;
10 is a schematic view showing an example in which the bolster volume of the seat back is adjusted by the seat control unit of the seat control device for a vehicle according to the present invention;
11 is a control graph showing a control example in which the bolster volume of the seat back is adjusted by the seat controller of the seat control device for a vehicle according to the present invention;
12 is a schematic view showing the principle that the driver's eye point is returned to the original position after the angle of the seat back is adjusted by the seat control unit of the seat control device for a vehicle according to the present invention;
13 is a flowchart illustrating a method for controlling a seat for a vehicle according to the present invention.

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

As shown in the configuration diagram of FIG. 1, the seat control device for a vehicle according to the present invention includes a measuring unit 10, a driving mode determining unit 20, a hugging feeling determining unit 30, and a hugging feeling analyzing unit 40 ), and a seat control unit 50 and the like.

The measurement unit 10 includes a body pressure sensor 12 mounted on the seat back to measure the driver's body pressure, a tilt sensor 14 mounted on the seat back to measure the inclination (angle) of the seat back, and the vehicle's and a height sensor 16 mounted on the front and rear suspension of the vehicle to obtain current inclination information (road inclination angle).

The body pressure sensor 12 is provided in a structure in which a plurality of body pressure sensors are attached to a flexible and thin mat at equal intervals along the horizontal and vertical directions, and is embedded between the seat back cover and the foam pad.

As a preferred embodiment, the body pressure sensor 12 is provided in a structure in which the body pressure sensor 15 is attached to the flexible mat 13 in a 3×3 arrangement, as shown in the accompanying FIG. A structure in which the first body pressure sensor 12-1, which is built in a pair of left and right side by side, respectively, in the upper, middle, and lower positions of the front center part, and the body pressure sensor 15, are attached to a flexible mat 13 in a 2×3 arrangement It is provided with a second body pressure measuring sensor 12-2 that is built in at the upper, middle, and lower positions of the bolsters 102 formed on both sides of the front side of the seat back 100, respectively.

As a preferred embodiment, the inclination sensor 14 is built in a predetermined position at the upper end of the seat back 100 as shown in the attached FIG. 3 to measure the angle of the seat back, and in particular, information on the angle of the seat back in the normal mode. It is adopted as a kind of MEMS sensor MEMS (Micro Electro-Mechanical Systems), which measures the amount of change in the seat back angle in the sports mode and transmits it to the hugging feeling determination unit 30 and the seat control unit 50 .

As a preferred embodiment, the height sensor 16 is mounted at the front and rear suspension positions of the vehicle as shown in the attached FIG. 4 to measure current inclination information (road inclination angle) of the vehicle, and determine hugging feeling based on the measured information transmitted to the unit 30 or the like.

At this time, as shown in the accompanying FIG. 10, a plurality of air cells 60 connected to a conventional air pressure supply means (not shown) are embedded in the bolster 102 of the seat back 100 to be expandable. , This air cell 60 is configured to include an upper air cell 62, an intermediate air cell 64, and a lower air cell 66 that are respectively built into the upper, middle, and lower ends of the bolster 102.

The driving mode determining unit 20 is for determining whether the current driving mode is the normal mode or the sports mode, and recognizes the current driving mode through the driver's driving mode switch switching operation signal or when the auto driving switch is turned on. The current driving mode is recognized using the navigation information.

For example, the driving mode determining unit 20 may receive a signal in which the driver switches the driving mode switch installed around the driver's seat to the sports mode, and recognizes the current driving mode as the sports mode, or sets the driving mode switch to the normal mode again. The current driving mode is recognized as the normal mode by receiving a signal for switching operation.

On the other hand, if the driver turns on the auto driving switch to automatically switch the vehicle driving mode to the normal mode or the sports mode, the current driving mode is changed to the sports mode if the vehicle speed is above the critical speed, the traffic condition is smooth, and rain information is not received. When the vehicle speed is lower than the critical speed, the traffic condition is not smooth, or rain information is received, the driving mode automatic switching logic for converting the current driving mode to the normal mode may be executed.

Accordingly, the driving mode determining unit 20 determines whether the current driving mode is the normal mode or the sports mode using the driving information from the navigation while the auto driving switch is turned on, but the vehicle speed is greater than or equal to the threshold speed and the traffic state If it is smooth and rain information is not received, the current driving mode is determined as the sports mode, and if the vehicle speed is less than the critical speed, the traffic condition is not smooth, or rain information is received, the normal mode is determined.

Referring to FIG. 6 attached, when dividing the back part of a person's body, the upper back (Upper-back), the middle back (Middle-back), the lower back (Lower-back), the back side part (Back-side), etc. can be distinguished.

However, since each person has different body conditions and different driving postures, the hugging feeling that the seat covers the person may be felt differently.

Therefore, a hugging feeling experiment was conducted for a number of experiment participants with different physical conditions in consideration of the shoulder height and hip width in the seated state.

That is, after a plurality of experiment participants with different physical conditions were seated on a seat, the measured values of the body pressure sensor embedded in each seat were analyzed, and then the hugging questionnaire was evaluated as a score.

As a result of the experiment, it was determined that the hugging feeling was excellent as the body pressure appeared wider and more evenly. It was found that the ratio of body pressure generation in the middle-back and back-side and the degree of unequal body pressure generation can be used as a hugging feeling scale.

Based on the experimental results, the hugging feeling determining unit 30 is configured to determine body pressure information transmitted from the first body pressure sensor 12-1 and the second body pressure sensor 12-2 of the measuring unit 10. Calculate the hugging feeling scale in which the seat wraps around the driver, but as a hugging feeling scale, the ratio of body pressure generation and the degree of unequal body pressure generation in the driver's middle-back and back-side parts are calculated.

In this case, the body pressure generation ratio (PAR, Pressure Appearance Ratio) may be calculated as the ratio of the body pressure sensor that generates an actual body pressure detection signal to the total body pressure sensor that can touch the middle of the driver's body compared to the total body pressure sensor, and the body pressure is generated The degree of inequality (PAUE, Pressure Appearance UnEvenness) can be calculated using the coefficient of variation (CV) method for detecting fluctuations in body pressure of the entire body pressure sensor that can come into contact with the driver's back and side parts. there is.

In addition, the hugging feeling determining unit 30 calculates the hugging feeling scale as described above, and then using the calculated hugging feeling scale, the mid-back and back-side parts of the driver's body in the normal mode. ), calculate the degree of hugging feeling as a numerical value (eg, score).

7A and 7B, as a measure of hugging feeling, the higher the body pressure generation rate, the higher the hugging feeling degree (score). Also, the lower the degree of inequality in body pressure, the higher the degree of hugging (score), and the higher the degree of inequality in body pressure, the lower the degree of hugging (score).

For example, the method of calculating the hugging feeling degree (score) is as shown in Equation 1 below, the body pressure generation ratio (PAR) and body pressure in the driver's middle-back and back-side parts. The result of stepwise regression can be applied to the degree of inequality of occurrence (PAUE), and hugging can be quantified by evaluating a feeling of hugging out of 100 points or a CR (consistency index) score through a questionnaire.

As a result, the example in which the hugging feeling determination unit 30 calculates the degree of hugging feeling in the mid-back and back-side of the driver's body in the normal mode as a numerical value (eg, score) is As shown in the left part in the attached table of FIG. 8, the hugging feeling is digitized with a total of 100 points, including 50 points for the mid-back hugging feeling, 50 points for the back-side hugging feeling, and a total of 100 points. can do.

Meanwhile, when the vehicle is currently traveling on a downhill road or an uphill road, body pressure increases or decreases in the driver's mid-back and back-side may occur, thereby varying the degree of hugging feeling.

Accordingly, when the hugging feeling determination unit 30 acquires the current inclination information of the vehicle from the height sensor 16 mounted on the front and rear suspension of the vehicle and determines that the vehicle is going downhill or uphill, the downhill slope angle or the uphill slope angle The degree of hugging can be calculated numerically by considering the increase and decrease in body pressure of the driver's mid-back and back-side according to the

For example, as shown in Equation 2 below, hugging each downhill road and uphill road according to the increase and decrease in body pressure in the driver's mid-back and back-side according to the road inclination angle α. The reduction formula can be derived by assuming the linearity of the body pressure generation according to the road inclination angle, and in this case, the road inclination angle does not affect the PAUE.

When the current driving mode is determined to be the sports mode, the hugging feeling analysis unit 40 is configured to perform a mid-back and back-side operation provided from the hugging feeling determining unit 30 in the normal mode. Set the degree of hugging by changing (increasing) to the target level for hugging in sport mode.

More specifically, when the sport mode is operated, it is necessary to provide a hugging feeling and support force that more envelops the driver's body in order to provide a seated feeling suitable for high-speed driving, and accordingly, the hugging feeling analyzer 40 The degree of hugging feeling (score) in mode is set by changing (increasing) to a target level that is changed (increased) by a certain level more than the degree of hugging feeling (score) in normal mode.

An example of setting the hugging feeling analysis unit 40 by increasing the hugging feeling of the mid-back and back-side in the normal mode to the target level for the hugging feeling in the sports mode is shown in the accompanying drawings. As shown in the right part in Table 8.

At this time, considering the high-speed driving in the sport mode, since side support is more important than the mid-back, the width of the hugging feeling score increase in the back side part is set to be larger than the hugging feeling score increase in the middle part. It is preferable to do

The seat control unit 50 determines the angle of the seat back and the seat according to the hugging feeling in the normal mode provided by the hugging feeling determining unit 30 and the hugging feeling in the sports mode provided by the hugging feeling analyzing unit 40 . Adjust the back bolster volume.

Preferably, according to the control signal of the seat control unit 50, the seat back angle is adjusted by an electric reclining device, and the seat back bolster volume is adjusted through pneumatic control of a plurality of air cells built in the bolster.

For example, referring to FIG. 9 attached, if the hugging feeling score for the mid-back provided from the hugging feeling determining unit 30 to the seat control unit 50 in the normal mode is 30, the seat back The angle is adjusted to 23°, and if the hugging feeling score for the mid-back in the sports mode provided to the seat control unit 50 from the hugging feeling analysis unit 40 is 45 points, the angle of the seat back is sports It is adjusted to 30° which is the optimal angle in mode.

For example, referring to the accompanying FIG. 10 , if the hugging feeling score for the side of the back provided from the hugging feeling determining unit 30 to the seat control unit 50 is 15 points, the bolster 102 ), the air supply amount to each air cell is adjusted so that the upper air cell 62 is the maximum expansion, the middle air cell 64 is the intermediate expansion, and the lower air cell 66 is the lowest expansion.

In addition, if the hugging feeling score for the side of the back provided from the hugging feeling analysis unit 40 to the seat control unit 50 is 40 points, the upper air cell 62 built into the bolster 102 is The air supply amount to each air cell is adjusted so that the maximum expansion, the middle air cell 64 is also the maximum expansion, and the lower air cell 66 is the maximum expansion.

At this time, in consideration of the fact that when the driving mode of the vehicle is switched to the normal mode or the sports mode, air supply (intake) and exhaust to the air cell 60 should be smoothly performed, as shown in FIG. 11 , Air supply (intake) to the air cell 60 proceeds for about 3 seconds after about 3 seconds from the time when the driving mode of the vehicle is switched from the normal mode to the sports mode, and at the time of switching from the sports mode to the normal mode again, approx. It is preferable to allow the air exhaust to the air cell 60 to proceed for about 2 seconds after 3 seconds.

In this way, by providing an optimal hugging feeling that stably surrounds the driver through the air cell expansion of the seat back in the sport mode, the driver can feel the seat seating feeling as if riding in a sports car in the sport mode. It can provide driving maneuverability and driving stability.

In addition, when accelerating and turning in the sports mode, the driver's body is tilted in the direction of generation of centrifugal force and inertia. It is possible to provide posture and seating comfort.

On the other hand, when the angle of the seat back is adjusted to be more inclined backward along with the transition from the normal mode to the sports mode, the driver's eye point is changed, so that the viewing angles looking at the back of the indoor rearview mirror and the outdoor side mirror may be changed.

Therefore, it is desirable for driving safety to return the driver's eye point changed after the seat back angle adjustment to the eye point before the seat back angle adjustment.

To this end, as shown in FIG. 12 , an eye tracking device 70 for detecting the driver's eye point before and after adjusting the seat back angle is mounted at a predetermined position in front of the driver's seat.

Preferably, the eye tracking device 70 may be adopted as a digital camera or the like capable of recognizing the driver's eye point as a predetermined coordinate value.

Accordingly, the eye tracking device 70 transmits a signal for returning the eye point after the seat back angle adjustment to the eye point before the seat back angle adjustment to the seat control unit 50, and as shown in FIG. The X-axis (front-to-back direction) and Z-axis position (up-down direction) of the electric seat cushion are adjusted by the control signal of the seat controller 50, so that the driver's eye point can be returned to the eye point before the seat back angle adjustment. .

More specifically, detecting the driver's eye point before adjusting the seat back angle by the eye tracking device 70, detecting the driver's eye point after adjusting the seat back angle by the eye tracking device 70, , analyzing the difference between the coordinate values of the driver's eye point before the seat back angle adjustment and the coordinate value of the driver's eye point after the seat back angle adjustment, and the eye point after the seat back angle adjustment before the seat back angle adjustment Transmitting a signal (eg, the analyzed coordinate value difference signal) to the seat control unit 50 for returning to the eye point of ) and the Z-axis position (up and down direction) are adjusted by the difference in coordinate values, so that the driver's eye point can be easily returned to the eye point before the seat back angle adjustment.

Alternatively, as another method for returning the driver's eye point to the eye point before the seat back angle adjustment, an eye point estimation formula may be used.

That is, as another method for returning the driver's eye point to the eye point before the seat back angle adjustment, an eye point estimation formula based on the driver's body information and the seat back angle information may be used, and the By controlling the X-axis (front-to-back direction) and Z-axis position (up and down direction) of the electric seat cushion after estimating the amount of change in the eye point, the driver's eye point can be easily returned to the eye point before the seat back angle adjustment. .

On the other hand, if the pneumatic pressure of the plurality of air cells built in the bolster is above a certain level, that is, if the air pressure of the air cells is above a certain level so that the bolster is expanded to suit the normal mode or sport mode situation, the bolster interferes when the driver and passengers get off It can act as a factor and cause discomfort.

Accordingly, the seat control unit 50 performs pneumatic exhaust control for a plurality of air cells built in the bolster for a certain period of time for ease of disembarking at the time of getting off the driver, and stores the air cell pneumatic pressure prior to exhaust control in the memory unit. .

For example, the pneumatic exhaust control of the air cell when the driver gets off is performed when the sensing value of the bolster pressure measuring sensor (not shown) separately built into the bolster is less than a certain level or after a certain time from the time the engine is turned off.

In more detail, the seat control unit 50 determines that the driver intends to get off when the sensing value of the bolster pressure sensor is less than a certain level, or determines that the driver intends to get off after a certain period of time from the engine start-off time Thus, pneumatic exhaust control for the air cell is performed for a predetermined time (eg, time until the air pressure of the air cell reaches the lowest critical level).

Accordingly, the driver's and passenger's alighting operation can be made comfortably without interference by the bolster.

On the other hand, the seat control unit 50 performs intake control for returning the pneumatic pressure of the air cell to the pressure before exhaust control for the welcome function when the driver gets on again.

For example, the pneumatic intake control of the air cell when the driver re-boards is performed after a predetermined time or a predetermined time when the sensing value of a bolster pressure measuring sensor (not shown) separately built into the bolster is above a certain level or when the engine is started.

In more detail, the seat control unit 50 determines that the driver intends to get off when the sensing value of the bolster pressure sensor is greater than or equal to a certain level, or returns to a state in which the driver is re-boarded after a certain period of time from when the engine is started. By judging, pneumatic intake control for the air cell is performed for a predetermined time (eg, until the air cell pressure before exhaust stored in the memory unit of the seat control unit is reached).

Accordingly, the driver can feel comfortable sitting in the seat with the welcome function according to the expansion of the bolster.

On the other hand, the seat controller 50 transmits information such as whether the current driving mode is a normal mode or a sports mode, and the bolster operation and pressure state of the seatback and seat cushion, via CAN communication (Audio, Video, AVN). Navigation) controller, and the transmitted information is displayed on the display by the AVN controller, so that the driver can visually recognize current driving information and bolster operation information.

Here, the seat control method of the present invention based on the above configuration will be sequentially described again with reference to the accompanying flowchart of FIG. 13 as follows.

First, the body pressure sensor 12 of the measuring unit 10 measures the driver's body pressure and transmits it to the hugging feeling determination unit 30, and the inclination sensor 14 measures the angle of the seat back to measure the seat back angle to the seat control unit ( 50), and the height sensor 16 transmits current inclination information (road inclination angle) of the vehicle to the hugging feeling determination unit 30 .

At this time, the driving mode determining unit 20 determines whether the current driving mode is a normal mode or a sports mode, and transmits it to the hugging feeling determining unit 30 and hugging feeling analyzing unit 40 .

Next, the hugging feeling determining unit 30 calculates a hugging feeling scale based on the body pressure information from the measuring unit 10 .

As described above, the body pressure generation ratio (PAR, Pressure Appearance Ratio) can be calculated as the ratio of the body pressure sensor that generates an actual body pressure detection signal to the total body pressure sensor that can touch the middle of the driver's body compared to the total body pressure sensor, The degree of body pressure inequality (PAUE, Pressure Appearance UnEvenness) is measured by using the coefficient of variation (CV) method for detecting fluctuations in body pressure of the entire body pressure sensor that can come into contact with the back side of the driver's body. can be calculated.

Subsequently, the hugging feeling determination unit 30 calculates the degree of hugging feeling (score) of the mid-back and back-side of the driver's body in the normal mode using the hugging feeling scale calculated above. Calculated numerically.

As described above, in the normal mode, the hugging feeling determination unit 30 calculates the degree of hugging feeling in the mid-back and back-side of the driver's body as a numerical value (eg, score). The example is as shown in the left part of the attached table of Fig. 8, and the mid-back hugging feeling is 50 points, the back-side hugging feeling is 50 points, a total of 100 points. The degree of hugging feeling is calculated numerically.

At this time, if the current driving mode is determined to be a sports mode, the hugging feeling analysis unit 40 provides a mid-back and a back-side portion in the normal mode provided from the hugging feeling determining unit 30 . Set the hugging feeling level by increasing it to the target level for the sport mode hugging feeling.

As described above, the hugging feeling analysis unit 40 increases the hugging feeling of the mid-back and back-side in the normal mode to the target level for the hugging feeling in the sports mode. An example is as shown in the right part in the attached table of FIG. 8. Considering high-speed driving in sport mode, since side support is more important than mid-back, the hugging feeling score of the side of the back is increased. It is preferable to set the width to be larger than the width of the hugging feeling score increase in the middle.

Next, the seat control unit 50 controls the current hugging feeling (score) in the normal mode provided by the hugging feeling determining unit 30 and the current hugging in the sport mode provided by the hugging feeling analyzing unit 40 . According to the sensitivity (score), adjust the seat back angle and seat back bolster volume.

For example, if the hugging feeling score for the mid-back provided from the hugging feeling determination unit 30 to the seat control unit 50 in the normal mode is 30 points, the angle of the seat back is adjusted to 23° and (See FIG. 9 ), if the hugging feeling score for the side of the back in the normal mode provided from the hugging feeling determination unit 30 to the seat control unit 50 is 15 points, it is built into the bolster 102 The air supply amount to each air cell is adjusted so that the upper air cell 62 has the maximum expansion, the middle air cell 64 has the intermediate expansion, and the lower air cell 66 has the lowest expansion (see FIG. 10 ).

Accordingly, in the normal mode, the driver can maintain a stable driving posture according to the seatback angle and the amount of bolster expansion suitable for the driver.

For example, if the hugging feeling score for the mid-back provided from the hugging feeling analysis unit 40 to the seat control unit 50 in the sport mode is 45 points, the angle of the seat back is optimal in the sport mode. If the angle is adjusted to 30° (refer to FIG. 9), and the hugging feeling score for the side of the back in the sport mode provided from the hugging feeling analysis unit 40 to the seat control unit 50 is 40 points The air supply amount to each air cell is adjusted so that the upper air cell 62 built into the bolster 102 has the maximum expansion, the middle air cell 64 also has the maximum expansion, and the lower air cell 66 has the maximum expansion (see FIG. 10 ).

Accordingly, by providing an optimal hugging feeling that stably surrounds the driver through the air cell expansion of the seat back in the sports mode, the driver can feel the seat seating feeling as if riding in a sports car in the sports mode, resulting in stable and dynamic driving It can provide maneuverability and driving stability.

10: measurement unit
12: body pressure sensor
12-1: first body pressure measuring sensor
12-2: second body pressure sensor
13 : flexible mat
14: tilt measuring sensor
15: body pressure sensor
16: height sensor
20: driving mode determining unit
30: hugging feeling determination unit
40: hugging feeling analysis unit
50: seat control unit
60: air cell
62: upper air cell
64: middle air cell
66: lower air cell
70: eye tracking device
100: seat back
102 : bolster

Claims (20)

To measure the driver's body pressure, a pair of first body pressure sensors are built in at the top, middle, and bottom positions of the front center of the seat back, and a second body pressure sensor is built in at the top, middle, and bottom positions of the bolsters on both sides of the front of the seat back, respectively. A body pressure measuring sensor including a, and a measuring unit including a tilt measuring sensor for measuring the inclination of the seat back;
a driving mode determining unit for determining a current driving mode;
A hugging feeling scale is calculated based on the body pressure information from the measurement unit, and the hugging feeling of the mid-back and back-side parts of the driver's body in the normal mode using the calculated hugging feeling scale. a hugging feeling determining unit that calculates the degree as a numerical value;
When the current driving mode is determined to be the sport mode, the hugging feeling of the mid-back and back-side in the normal mode provided from the hugging feeling determining unit is a target for the hugging feeling in the sport mode. A hugging feeling analysis unit that changes and sets the level; and
a seat control unit for adjusting a seat back angle and a seat back bolster volume according to the hugging feeling in the normal mode provided by the hugging feeling determining unit and the hugging feeling in the sports mode provided by the hugging feeling analyzing unit;
including,
The hugging feeling scale is calculated using body pressure information from the measurement unit, and the ratio of body pressure generation in the middle and back of the driver's body and the degree of unequal body pressure generation are determined.
The body pressure generation ratio is calculated as the ratio of the body pressure sensor generating an actual body pressure detection signal to the total body pressure sensor that can come in contact with the middle of the driver's body, and the degree of body pressure inequality is the total body pressure that can come into contact with the back side of the driver's body. A seat control device for a vehicle, characterized in that it is calculated using the coefficient of variation (standard deviation/average) method for the change in body pressure detection of the sensor.
The method according to claim 1,
The body pressure sensor is embedded between the seat back cover and the foam pad, and is provided in a structure in which body pressure sensors are attached in a 3×3 arrangement on a flexible mat, and is built in a pair at the top, middle, and bottom positions in the front center of the seat back. It consists of a first body pressure sensor to be used and a second body pressure sensor to be installed in the upper, middle, and lower positions of the bolsters on both sides of the front side of the seat back, each having a structure in which the body pressure sensors are attached to a flexible mat in a 2×3 arrangement. Seat control device for automobiles.
The method according to claim 1,
The inclination measuring sensor is embedded in a predetermined position of the seat back and is adopted as a kind of MEMS sensor for measuring seat back angle information in normal mode and seat back angle change in sport mode.
The method according to claim 1,
The measurement unit seat control device for a vehicle, characterized in that it further comprises a height sensor mounted on the front and rear suspension in order to obtain the current inclination information of the vehicle.
The method according to claim 1,
The driving mode determining unit determines the current driving mode of the vehicle as a normal mode or a sports mode based on a driving mode selection signal from a driving mode switch or driving information from a navigation having GPS.
6. The method of claim 5,
The driving mode determining unit determines whether the current driving mode is a normal mode or a sports mode using the driving information from the navigation while the auto driving switch is turned on, but the vehicle speed is above the critical speed, the traffic condition is smooth, and the When not received, the current driving mode is determined as the sports mode, and when the vehicle speed is less than a critical speed, the traffic condition is not smooth, or rain information is received, the vehicle seat control device, characterized in that it is determined as the normal mode.
delete delete The method according to claim 1,
By detecting the driver's eye point before and after adjusting the seat back angle, a signal for returning the eye point after adjusting the seat back angle to the eye point before adjusting the seat back angle is transmitted to the seat control unit to determine the X axis of the seat cushion and A seat control device for a vehicle, characterized in that it further comprises an eye tracking device to adjust the Z-axis position.
The method according to claim 1,
The seat control unit performs pneumatic exhaust control for a plurality of air cells built in the bolster for a certain period of time for ease of getting off the driver, and performs intake control to return the air pressure to the air cells to the pressure before exhaust control when the driver gets on again. A seat control device for a vehicle, characterized in that configured to do so.
11. The method of claim 10,
The exhaust control is performed until the sensing value of the bolster pressure sensor is less than a certain level or a predetermined time has passed from the time when the engine is turned off, and the intake control is performed until the air cell pressure before exhaust stored in the memory of the seat control unit is reached. A seat control device for automobiles characterized by its features.
i) In the body pressure measuring unit of the seat back, which includes a first body pressure measuring sensor built into the upper, middle, and lower positions of the front center of the seat back and a second body pressure measuring sensor built at the upper, middle, and lower positions of the bolsters on both sides of the seat back. measuring the body pressure of the driver;
ii) determining whether the current driving mode is a normal mode or a sports mode in the driving mode determining unit;
iii) The hugging feeling determination unit calculates a hugging feeling scale based on the body pressure information transmitted from the first body pressure measuring sensor and the second body pressure measuring sensor, and using the calculated hugging feeling scale, the middle of the driver's body in normal mode calculating the degree of hugging feeling of the back (Mid-back) and the back side (Back-side) numerically;
iv) When the current driving mode is determined to be the sports mode, the hugging feeling analysis unit calculates the hugging feeling of the mid-back and back-side in the normal mode provided from the hugging feeling determining unit in the sports mode. changing and setting a target level for hugging feeling in mode; and
ⅴ) adjusting the seat back angle and seat back bolster volume by the seat control unit according to the hugging feeling in the normal mode provided by the hugging feeling determining unit and the hugging feeling in the sports mode provided by the hugging feeling analyzing unit;
including,
In step iii), the hugging feeling scale is calculated using the body pressure information from the measurement unit, and the rate of body pressure generation and the degree of unequal body pressure generation in the middle and back of the driver's body are determined.
The body pressure generation ratio is calculated as the ratio of the body pressure sensor generating an actual body pressure detection signal to the total body pressure sensor that can come in contact with the middle of the driver's body, and the degree of unequal body pressure generation is the total body pressure that can come into contact with the back side of the driver's body A method for controlling a seat for a vehicle, characterized in that it is calculated using a coefficient of variation (standard deviation/average) method for the body pressure sensing fluctuation of the sensor.
13. The method of claim 12,
In step ii), the driving mode determining unit determines whether the current driving mode is the normal mode or the sports mode using driving information from the navigation while the auto driving switch is turned on, but the vehicle speed is higher than the threshold speed and the traffic condition is When it is smooth and rain information is not received, the current driving mode is determined as the sports mode, and when the vehicle speed is less than a critical speed, the traffic condition is not smooth, or rain information is received, the normal mode is determined. .
delete delete 13. The method of claim 12,
In step iii), after obtaining the current inclination information of the vehicle from the height sensor mounted on the front and rear suspension of the vehicle in the hugging feeling determining unit, and determining that the vehicle is going downhill or uphill, A method for controlling a seat for a vehicle, characterized in that the degree of hugging is calculated as a numerical value in consideration of the increase and decrease in body pressure of the driver's mid-back and back-side.
13. The method of claim 12,
In step v), the seat back angle is adjusted by an electric reclining device that receives a signal from the seat controller, and the seat back bolster volume is adjusted by pneumatic control of a plurality of air cells built in the bolster. How to control seats for automobiles.
13. The method of claim 12,
Detecting the driver's eye point before adjusting the seat back angle in the eye tracking device before step v);
Detecting the driver's eye point after adjusting the seat back angle in the eye tracking device after step v);
transmitting a signal for returning the eye point after the seat back angle adjustment to the eye point before the seat back angle adjustment to the seat control unit;
Returning the driver's eye point to the eye point before the seat back angle adjustment by adjusting the X-axis and Z-axis positions of the electric seat cushion by the seat controller;
Seat control method for a vehicle, characterized in that it further comprises.
13. The method of claim 12,
When the driver gets off, the seat control unit performs pneumatic exhaust control for a plurality of air cells built in the bolster for a certain period of time for ease of disembarking, and when the driver gets back on again, air intake control for returning the air pressure to the pressure before exhaust control A method for controlling a seat for a vehicle, characterized in that it carries out.
20. The method of claim 19,
The exhaust control is performed until the sensing value of the bolster pressure sensor is less than a certain level or a predetermined time has passed from the time when the engine is turned off, and the intake control is performed until the air cell pressure before exhaust stored in the memory of the seat control unit is reached. A method for controlling a seat for an automobile, characterized in that it.

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