Active Pre Safety Seat System of Vehicle and Method for Improving Control Speed of Pre Safety Seat Thereof

Abstract

The active seat posture control system (10) applied to the vehicle (1) of the present invention implements a seat posture control speed enhancement method in which the controller (50) confirms that the recline angle, slide movement position, and cushion tilt angle detected by multiple sensors of multiple seat sensors (30) in a dangerous collision situation detected by the vehicle environment sensor (20) of the ADAS (9) are in a dangerous area by matching them with the seat safety map (60), and simultaneously controls multiple motors of multiple seat motors (40) in combination for the seat target posture of the seat (30) to transition from the dangerous area to the safe area, thereby shortening the time required for the PSS (Pre Safety Seat) of the seat target posture in the PSS (Pre Safety Seat) operation range from danger detection to before collision.

Description

Technology Field

[0001] The present invention relates to a vehicle seat posture control system, and more specifically, to a method for improving the speed of vehicle seat posture control using an active seat posture control system in which the time required for PSS (Pre Safety Seat) at the point of vehicle collision risk detection is accelerated by the performance of multiple motors. Background Technology

[0002] Recently, PSS (Pre Safety Seat) control is being applied to protect passengers in the event of a vehicle collision.

[0003] For example, the above-mentioned PCS (Pre Safety Seat) control is a method in which a collision is anticipated by detecting a collision risk with an ADAS (Advanced Driver Assistance System) environment sensor, and in response, the seat position is changed to reduce injury to a passenger in an abnormal position outside the coverage range of the seat belt and airbag.

[0004] To this end, the above PSS (Pre Safety Seat) control uses a seat motor to control the current seat position to a target position, and rapidly changes the unstable position of the current backrest to a safe target position angle using the performance of the seat motor.

[0005] Therefore, the above PSS (Pre Safety Seat) control can improve passenger safety from collision risks where serious injury may occur despite the use of seat belts and airbags, such as when the collision speed is high, the seat position is rearward, or the seat back is reclined. Prior art literature

[0006] Korean Patent Publication 10-2020-0046940 (2020.05.07) The problem to be solved

[0007] However, although the required PSS time in the above-mentioned PSS (Pre Safety Seat) control is determined by the difference between the seat's current and target positions and the seat motor performance, it may be difficult to achieve sufficient performance depending on the collision situation by matching this with only a single motor performance.

[0008] For example, when the motor speed is A° / sec, B sec is required to rapidly change the angle of the backrest to the target position from X° to Y°. In this case, A and B are values ​​that can ensure passenger safety in a typical vehicle collision situation, and the X and Y range is the range of angle change for a typical seat backrest, meaning that X° is reclined further back than Y°.

[0009] If the collision risk is detected late through the ADAS environment sensor in a situation where the vehicle in front suddenly stops or an accident occurs, the time to change the seat position is shorter than the time required for PSS (Pre Safety Seat) control, making it impossible to secure a safe position.

[0010] Even in collision situations measured in this way, if the recline motor is used exclusively for controlling the seat back angle of the PSS (Pre Safety Seat), it becomes very difficult to enhance robustness against sudden accidents.

[0011] Accordingly, the present invention, taking into account the above points, aims to provide an active seat posture control system for vehicles and a method for improving seat posture control speed, wherein a multi-seat motor composed of multiple motors that individually control the recline angle, sliding position, and tilt angle is applied to the seat, and in a situation where a vehicle collision risk is detected, the recline angle of the seat back, the sliding position of the seat cushion, and the tilt angle of the seat cushion are all controlled by the multi-seat motor, thereby shortening the time required for PSS (Pre Safety Seat) operation from the risk detection to the pre-collision range to change the seat from a dangerous posture to a safe posture. means of solving the problem

[0012] The vehicle seat posture control system of the present invention for achieving the above-mentioned purpose comprises: a vehicle environment sensor that detects information on dangerous collision situations regarding surrounding vehicles while driving the vehicle; a multi-seat sensor that detects one or more of a recline angle, a slide movement position, and a cushion tilt angle as the current seat posture of the seat; a multi-seat motor that generates motor driving force to change the seat from the current seat posture to a target seat posture by changing one or more of the recline angle, the slide movement position, and the cushion tilt angle; and a controller that controls the motor driving force to the target seat posture in a dangerous collision situation identified by the dangerous collision situation information.

[0013] In a preferred embodiment, the vehicle environment sensor is a component of ADAS.

[0014] In a preferred embodiment, the multiple seat sensor is mounted on the seat and comprises a recline sensor that detects the recline angle, a slide sensor that detects the slide movement position, and a tilt sensor that detects the cushion tilt angle.

[0015] In a preferred embodiment, the recline sensor is mounted on the seat back of the seat, the slide sensor is mounted on the seat cushion of the seat, and the tilt sensor is mounted at the connection point between the seat cushion and the seat back.

[0016] In a preferred embodiment, the multi-seat motor is mounted on the seat and comprises a recline motor that increases or decreases the recline angle, a slide motor that changes the slide movement position, and a tilt motor that increases or decreases the cushion tilt angle.

[0017] In a preferred embodiment, the recline motor is mounted on the seat back of the seat, the slide motor is mounted on the seat cushion of the seat, and the tilt motor is mounted on the hinge connection between the seat cushion and the seat back.

[0018] In a preferred embodiment, the recline motor, the slide motor, and the tilt motor are step motors.

[0019] In a preferred embodiment, the controller is linked to a seat safety map that distinguishes a danger zone and a safety zone based on the backrest angle and tilt angle of the seat, and the danger zone is applied as a matching section where the current seat posture must be changed to the seat target posture.

[0020] In a preferred embodiment, the controller matches the recline angle according to the slide movement position with the backrest angle and matches the cushion tilt angle with the tilt angle, and generates a motor output that changes from the current seat position to the seat target position as a result of the matching.

[0021] In a preferred embodiment, the controller divides the motor output into a recline motor output that changes the recline angle, a slide motor output that changes the slide movement position, and a tilt motor output that changes the cushion tilt angle.

[0022] In a preferred embodiment, the controller simultaneously sends the recline motor output and the slide motor output to the multiple seat motors, thereby reducing the PSS required time for the seat target position during the PSS operation range from danger detection to before collision.

[0023] The method for improving the speed of seat posture control according to the present invention for achieving the above-mentioned purpose is characterized by being performed in the following steps: a step in which a collision risk situation regarding surrounding vehicles detected by ADAS during driving of a vehicle is confirmed by a controller; a map matching step in which one or more of the recline angle, slide movement position, and cushion tilt angle detected by multiple seat sensors installed on the seat are matched with a seat safety map to confirm the current seat posture, and the current seat posture is confirmed to be a risk area; a step in which a change to one or more of the recline angle, slide movement position, and cushion tilt angle is determined; and a motor driving step in which, during the PSS operation range from risk detection to before collision, multiple seat motors installed on the seat are driven and controlled to change the current seat posture to a seat target posture in a safety area.

[0024] In a preferred embodiment, the controller analyzes the seat safety map when it is confirmed that the seat target posture belongs to the danger zone, and sets the posture of the nearest safe zone found from the current seat posture as the target posture.

[0025] In a preferred embodiment, the map matching step matches the recline angle according to the slide movement position to the backrest angle of the seat safety map and matches the cushion tilt angle to the tilt angle of the seat safety map, and the risk area and the safety area for the current seat posture are identified as a matching result.

[0026] In a preferred embodiment, the motor driving step is performed by a seat back angle adjustment step that changes the inclination angle of the recline angle, a seat cushion position movement step that moves the slide movement position, and a seat cushion tilt adjustment step that changes the height of the cushion tilt angle.

[0027] In a preferred embodiment, the seat back angle adjustment step and the seat cushion position movement step are simultaneously controlled to reduce the PSS required time for the seat target posture.

[0028] In a preferred embodiment, the seat back angle adjustment step is performed by a step of checking whether the recline angle is unsatisfactory to the target safety area and a step of changing the inclination angle of the recline angle by driving a recline motor provided in the seat.

[0029] In a preferred embodiment, the seat cushion position movement step is performed by a step of checking whether the slide movement position is a target non-satisfaction with the safety area, and a step of moving the slide movement position by driving a slide motor provided in the seat.

[0030] In a preferred embodiment, the seat cushion tilt adjustment step is performed by a step of checking whether the cushion tilt angle is a target non-satisfaction with the safety area, and a step of changing the inclination angle of the cushion tilt angle by driving a tilt motor provided in the seat. Effects of the invention

[0031] The active seat posture control system of the present invention, through the speed enhancement of vehicle seat posture control, implements the following operations and effects.

[0032] First, the application of a multi-seat motor system, consisting of three independent motors that respectively control the seat's recline angle, slide position, and tilt angle, enhances the seat motor performance in determining the time required for the Pre-Safety Seat (PSS) along with the difference between the seat's current and target positions. Second, by having the high-performance multi-seat motor control the recline angle, slide position, and tilt angle simultaneously at the moment of collision risk detection, the time required for the PSS is shortened through improved PSS speed. Third, the performance of PSS speed improvement is further enhanced by changing the control of the tilt angle to a tilt motor in addition to the simultaneous operation of the recline and slide motors for the seat's recline angle control. Fourth, the robustness of the PSS technology is improved because the improved PSS speed allows for a sufficient transition to the safe zone even if the collision risk detection point is delayed. Fifth, the improved PSS speed allows for delaying the initiation of PSS operation even if the collision risk detection point remains the same, thereby minimizing consumer complaints caused by frequent operation. Brief explanation of the drawing

[0033] FIG. 1 is a configuration diagram of an active seat posture control system applied to a vehicle according to the present invention, FIG. 2 is a configuration diagram of a controller of an active seat posture control system according to the present invention, FIG. 3 is a flowchart of a method for improving the speed of seat posture control using an active seat posture control system for a vehicle according to the present invention, FIG. 4 is a state in which a vehicle according to the present invention detects surrounding vehicles using a vehicle environment sensor of ADAS, FIG. 5 is an example of the PSS required time of an active seat posture control system in an ADAS operating state of a collision risk situation according to the present invention, FIG. 6 is an example of a vehicle active seat posture control system according to the present invention confirming a seat target posture in a seat safety map built as a DB, FIG. 7 is a state of changing the seat back recline angle and moving the cushion position in which seat posture control using a recline motor and a slide motor is performed during the PSS required time according to the present invention, FIG. 8 is a state of changing the cushion tilt angle of seat posture control using a tilt motor during the PSS required time according to the present invention. Specific details for implementing the invention

[0034] Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein.

[0035] FIGS. 1 and FIGS. 2 show a vehicle (1) with a seat posture control system (10) applied.

[0036] Referring to FIG. 1, the seat posture control system (10) is applied to a seat (3), and the seat (3) is composed of a seat cushion (3A) on which a driver or passenger sits and a seat back (3B) that supports the back of the driver or passenger.

[0037] However, the above seat (3) is connected to the seat posture control system (10), so that the seat cushion (3A) moves by sliding along the floor panel (5), forming an up / down movement with the tilt angle as a cushion tilt, and the seat back (3B) is positioned in the middle of the front / rear door of the vehicle (1) and forms a movement that reclines forward / rear with respect to the backrest angle relative to the B Pillar (7) equipped with the seat belt anchor (7A).

[0038] In particular, the sliding movement of the seat cushion (3A) is linked to the slide motor (42), the cushion tilt of the seat cushion (3A) is linked to the tilt motor (43), and the recline inclination of the seat back (3B) is linked to the recline motor (41).

[0039] For example, the above-mentioned seat posture control system (10) is characterized as an active seat posture control system by applying multiple seat sensors (30) and multiple seat motors (40) to the seat (3) and improving the PSS speed within the required time for PSS (Pre Safety Seat).

[0040] To this end, the seat posture control system (10) includes a vehicle environment sensor (20), multiple seat sensors (30), multiple seat motors (40), a controller (50), and a seat safety map (60).

[0041] Specifically, the vehicle environment sensor (20) is a variety of sensors that constitute the ADAS (Advanced Driver Assistance System) (9) of the vehicle (1). In this case, the ADAS (9) is a 3D type and is linked with a map database using a LiDAR (Light Detection And Range) that can measure the position coordinates of a reflector by measuring the time it takes for light to be emitted and reflected back, and a camera that captures road information as an image, thereby providing the distinction between lanes and target points, determination of road types, and the behavior of the current driving lane and surrounding vehicles.

[0042] Therefore, the above vehicle environment sensor (20) is the same as the sensor applied to the ADAS (9).

[0043] Specifically, the multi-seat sensor (30) is composed of three pairs of recline sensors (31), slide sensors (32), and tilt sensors (33) and is installed on the seat (3).

[0044] For example, the above recline sensor (31) detects a change in the backrest angle of the seat back (3B) as a recline inclination angle and provides it to the controller (50), the above slide sensor (32) detects a sliding movement distance of the seat cushion (3A) moving from the floor panel (5) and provides it to the controller (50), and the above tilt sensor (33) is mounted on the hinge connection part of the seat cushion (3A) and the seat back (3B) so as to detect a tilt angle of the degree to which the seat cushion (3A) is inclined relative to the seat back (3B) as a cushion tilt and provides it to the controller (50).

[0045] Specifically, the multi-seat motor (40) is composed of three pairs of recline motors (41), slide motors (42), and tilt motors (43) and is installed on the seat (3). In this case, it is preferable to use step motors for each of the motors (41, 42, 43) that allow for easy adjustment of the motor rotation speed.

[0046] In particular, the above recline motor (41), the above slide motor (42), and the above tilt motor (43) each utilize motor rotational force to control the recline inclination angle, the cushion tilt inclination angle, and the slide travel distance by configuring a rack and pinion gear pair (not shown) together.

[0047] For example, the above-mentioned recline motor (41) is mounted on the seat back (3B) of the seat (3) and generates motor rotational force to move the seat back (3B) closer to or further away from the B-pillar (7), thereby changing the recline angle forward / backward by changing the backrest angle. The above-mentioned slide motor (42) is mounted on the seat cushion (3A) of the seat (3) and generates motor rotational force to move the seat cushion (3A) relative to the floor panel (5), thereby changing the sliding position forward / backward (i.e., vehicle front / rear) by changing the moving position of the seat cushion (3A). The above tilt motor (43) is mounted at the hinge connection between the seat cushion (3A) and the seat back (3B) of the seat (3), and generates motor rotational force to raise or lower the seat cushion (3A) relative to the seat back (3B), thereby changing the height and inclination angle of the seat cushion (3A) to increase or decrease the cushion tilt angle.

[0048] To this end, the recline motor (41) and the tilt motor (43) transmit motor rotational force to the seat back (3B) of the seat (3) through a rotating gear (e.g., spur gear, bevel gear, helical gear, worm / worm gear, etc.), and the slide motor (42) transmits motor rotational force to the seat cushion (3A) of the seat (3) through a linear conversion gear (e.g., rack / pinion gear).

[0049] Accordingly, the multiple seat sensors (30) of the recline sensor (31), the slide sensor (32), and the tilt sensor (33), and the multiple seat motors (40) of the recline motor (41), the slide motor (42), and the tilt motor (43) constitute a multi-degree-of-freedom seat mechanism for the seat (3).

[0050] From this, the multi-degree-of-freedom seat mechanism includes degrees of freedom for determining seat postures other than recline / slide / cushion tilt by expressing the current posture of the seat as a recline angle, slide position, and cushion tilt angle. Therefore, the multi-degree-of-freedom seat mechanism can significantly improve the seat motor performance for determining the PSS (Pre Safety Seat) required time along with the difference between the current and target postures of the seat (3) in a collision risk situation of the vehicle (1).

[0051] Specifically, the above controller (50) is a PSS controller, and when a danger signal detected by the vehicle environment sensor (20) is transmitted, it controls the motor voltage or current for each of the multi-seat motors (40) to change the current seat posture of the seat (3) detected by the multi-seat sensor (30) to the target posture provided by the seat safety map (60).

[0052] To this end, the controller (50) receives the vehicle environment sensor signal (a) and the multi-seat sensor signal (b) as control data, outputs the recline motor output (d), slide motor output (e) and tilt motor output (f) as driving data, and operates as a central processing unit by having a memory that stores the logic for performing seat posture control speed enhancement control (see FIG. 4) as a program.

[0053] Specifically, the above-mentioned seat safety map (60) is a database (DB) that has compiled crash test results for each seat position of the seat (3), and includes a backrest angle (X) - tilt angle (Y) curve of the seat (3) that divides the seat position conditions into safe and dangerous areas through analysis of the DB.

[0054] In particular, the above backrest angle (X)-tilt angle (Y) diagram is provided as a matching map for the detected recline angle of the seat back (3B) (i.e., backrest angle (X)) and the cushion tilt angle of the seat cushion (3A) (i.e., tilt angle (Y)).

[0055] Referring to FIG. 2, the controller (50) may be configured to include a seat target posture setting unit (51) and a seat motor drive control unit (53).

[0056] For example, the above-mentioned seat target posture setting unit (51) matches the detected recline angle of the seat back (3B) and the cushion tilt angle of the seat cushion (3A) with the backrest angle (X)-tilt angle (Y) curve of the seat safety map (60), and sets the seat target posture by extracting the difference between the current and target postures of the seat (3) as a result of the matching.

[0057] For example, the seat motor drive control unit (53) controls the motor voltage or current for each of the motors (41, 42, 43) of the multi-seat motor (40) using P and I during PID control. In this case, PID means P (Proportional), I (Integral), and D (Derivative).

[0058] In particular, the seat motor drive control unit (53) controls the voltage of each motor (41, 42, 43) until the current seat position changes to the target position during driving for each motor.

[0059] Meanwhile, FIGS. 3 to 8 illustrate a state in which the vehicle (1) changes the current posture of the seat (3) to the target posture of the seat in a dangerous collision situation through a method of increasing the speed of seat posture control of the seat posture control system (10). In this case, the controlling entity is the controller (50), and the control target is each of the recline motor (41), slide motor (42), and tilt motor (43) constituting the multiple seat motors (40).

[0060] Referring to FIG. 3, the controller (50) performs the seat posture control speed improvement method in the following steps: S10, a collision risk recognition step; S20, a map matching seat posture risk verification step; S30, a seat target posture verification step; and S40, a multi-seat motor driving step.

[0061] For example, the collision risk recognition (S10) above determines the degree of collision risk between the self vehicle and surrounding vehicles from surrounding vehicle information generated in the vehicle environment sensor information detection step of S10-1.

[0062] Referring to FIGS. 1 and FIGS. 4, the vehicle environment sensor (20) detects a vehicle (100) traveling in front of the vehicle (1) from the front / rear and left / right sides as surrounding vehicle location information while the vehicle (1) is driving, and performs vehicle environment sensor information detection (S10-1). The controller (50) checks the vehicle location, surrounding vehicle location, and distance between vehicles, etc., from the surrounding vehicle location information transmitted from the vehicle environment sensor (20) by utilizing GPS information when necessary. In this case, the surrounding vehicle location information of the vehicle environment sensor (20) includes the distance to a collision object, relative speed, acceleration information, etc., and the information transmission can be done using CAN (Controller Area Network), Bluetooth, or wireless communication.

[0063] Referring to FIG. 5, the controller (50) uses the distance between vehicles to detect collision risks classified by collision risk judgment logic (e.g., LCA (Lateral Collision-Avoidance Assist) and / or BCA (Backward Collision-Avoidance Assist)) and identifies the collision risk as Frontal Collision Warning (FCW) and Frontal Collision-Avoidance Assist (FCA).

[0064] From this, the controller (50) sets the partial braking and full braking processes of the FCA in the collision warning of the FCW as the PSS operation possible section.

[0065] For example, the map matching seat posture risk check (S20) above checks the seat target posture from the seat current posture information for the seat (3) of the vehicle (1) generated in the multi-seat sensor information detection step of S20-1.

[0066] Referring to FIG. 1, the multiple seat sensors (30) detect the recline angle of the seat back (3B) of the recline sensor (31), the sliding distance of the seat cushion (3A) of the slide sensor (32), and the cushion tilt angle of the seat cushion (3A) of the tilt sensor (33), and provide these detected values ​​to the controller (50) via CAN.

[0067] Then, the controller (50) takes the detected values ​​of the recline inclination angle, sliding distance, and cushion tilt angle for the seat (3) as current seat position information, and matches the current seat position information with the seat safety map (60) to determine whether the seat (3) is in a safe area or a dangerous area.

[0068] For example, the above seat target posture verification (S30) verifies the seat target posture from the current seat posture using the recline angle, sliding distance, and cushion tilt angle that the seat (3) has in its current state (i.e., collision risk situation).

[0069] Referring to FIG. 2, the controller (50) performs matching between the seat target posture setting unit (51) and the seat safety map (60) to verify the seat target posture.

[0070] Referring to FIG. 6, the seat safety map (60) is constructed by separating the occurrence / non-occurrence of submarines into a danger zone and a safety zone for seat postures according to the recliner, slide, and cushion tilt degrees of freedom of the seat (3), and is represented by a backrest angle (X)-tilt angle (Y) diagram. In this case, the danger / safe zones are determined from crash test or analysis result data for each posture of the seat (3).

[0071] For example, the data mapping process of the seat safety map (60) to obtain the seat target position and PSS (Pre Safety Seat) required time in a collision risk situation is as follows.

[0072] First, let “A,” “B,” and “C” be the candidate target postures for the safety zone for the current seat risk zone posture “O.” “A” is a situation where the seat moves to the safety zone by adjusting only the cushion tilt angle from the current posture, “B” is a situation where the seat moves to the safety zone by adjusting both the cushion tilt angle and the backrest angle from the current posture, and “C” is a situation where the seat moves to the safety zone by adjusting only the backrest angle from the current posture.

[0073] Then, the PSS required time required to implement any one of “A” / “B” / “C” in the above “O” position can be extracted as follows. In this case, “Tilt_A” is the tilt angle of position A, “V_Reclin” is the operating speed of the recline motor (41), “V_Slide” is the operating speed of the slide motor (42), “V_Tilt” is the operating speed of the tilt motor (43), and the motor speed refers to the rotational speed of some place, RPM (Revolution Per Minute).

[0074] (1) Formula for calculating the time required for PSS when changing from “O” to “A”

[0075] ΔT_A = (Tilt_A - Tilt_O) / V_Tilt

[0076] (2) Formula for calculating the time required for PSS when changing from “O” to “B”

[0077] ΔT_B= max{(Backrest_Angle_B-Backrest_Angle_O) / (V_Slide+ V_Reclin),(Tilt_B-Tilt_O) / (V_Tilt)}

[0078] (3) Formula for calculating the time required for PSS when changing from “O” to “C”

[0079] ΔT_C = (Backrest_Angle_C - Backrest_Angle_O) / (V_Slide + V_Reclin)

[0080] From this, since “ΔT_A / ΔT_B / ΔT_C” has the relationship “ΔT_B < ΔT_C” and “ΔT_B < ΔT_A”, it can be seen that the motor operating time is minimized when changing from the “O” position to the “B” position.

[0081] Therefore, in the risk collision compensation, the time required for PSS is minimized by simultaneous driving control of the recline motor (41) and the slide motor (42) as “ΔT_B”, thereby bringing the seat closer to the target position first, and then the tilt motor (43) is driven to finally reach the target position.

[0082] For example, the above multi-seat motor drive (S40) is performed in the seat back angle adjustment step of S50 to S60, the seat cushion position movement step of S70 to S80, and the seat cushion tilt adjustment step of S90 to S100.

[0083] In particular, the steps of the seat back angle adjustment (S50~S60), the seat cushion position movement (S70~S80), and the seat cushion tilt adjustment (S90~S100) are controlled simultaneously by the controller (50) in accordance with “ΔT_B” for minimizing the PSS required time as described in FIG. 6, thereby allowing the recline motor (41) and the slide motor (42) constituting the multiple seat motors (40) to be driven together.

[0084] Therefore, the recline motor (41), slide motor (42), and tilt motor (43) constituting the multi-seat motor (40) can be driven individually, in combination of two, or in combination of three to change the position of the seat (3) from its current position to the position of the nearest safe area.

[0085] Specifically, the seat back angle adjustment (S50~S60) is performed by a step of checking whether the recline of S50 is unsatisfactory to the target and a step of controlling the recline motor drive of S60. The seat cushion position movement (S70~S80) is performed by a step of checking whether the slide of S70 is unsatisfactory to the target and a step of controlling the slide motor drive of S80. In this case, the confirmation of unsatisfactory recline target (S50) and the confirmation of unsatisfactory slide target (S70) are values ​​confirmed from the matching result through the seat safety map (60) of FIG. 6.

[0086] FIG. 7 illustrates that the controller (50) simultaneously performs the seat back angle adjustment (S50~S60) and the seat cushion position movement (S70~S80).

[0087] As described, the controller (50) sends the recline motor output (d) of the seat motor drive control unit (53) to the recline motor (41) for the seat target posture required to move the dangerous area, which is the result matched in the seat safety map (60), into the safe area, and simultaneously sends the slide motor output (e) to the slide motor (42).

[0088] Then, the above-mentioned recline motor (41) is driven by receiving the recline motor output (d) to generate rotational force, and the motor rotational force is transmitted to the seat back (3B) of the seat (3) through a rotating gear (e.g., spur gear, bevel gear, helical gear, worm / worm gear, etc.), thereby reducing the recline angle of the seat back (3B), and the reduction in the recline angle narrows the back angle (X) of the seat (3), thereby bringing the passenger's upper body into close contact with the seat back (3B), reducing passenger movement due to impact, and increasing safety.

[0089] At the same time, the slide motor (42) is driven by receiving the slide motor output (e) to generate rotational force, and the motor rotational force is transmitted to the seat cushion (3A) of the seat (3) through a linear conversion gear (e.g., rack / pinion gear), thereby increasing the sliding movement position of the seat cushion (3A). The increase in the sliding movement position moves the seat (3) further forward, thereby bringing the passenger's lower body into close contact with the seat cushion (3A), reducing passenger movement due to impact and increasing safety.

[0090] In this way, it is proven that the seat posture control system (10) can simultaneously control the recline motor (41) and the slide motor (42) of the multiple seat motors (40) to minimize the time required for PSS, thereby accelerating the attainment of the seat target posture of the seat (3), and thereby enhancing passenger safety during the PSS operation range (see FIG. 5) in dangerous collision situations.

[0091] Specifically, the seat cushion tilt adjustment (S90 to S100) is performed by a step of checking whether the cushion tilt of S90 is unsatisfactory to the target, and a step of controlling the cushion tilt motor drive of S100. In this case, the confirmation of unsatisfactory cushion tilt target (S90) is a value confirmed from the matching result through the seat safety map (60) of FIG. 6.

[0092] FIG. 8 illustrates that the controller (50) performs the seat cushion tilt adjustment (S90~S100).

[0093] As described, the controller (50) sends the tilt motor output (f) of the seat motor drive control unit (53) to the tilt motor (43) for the seat target posture required to move the dangerous area, which is the result matched in the seat safety map (60), into the safe area.

[0094] Then, the tilt motor (43) receives the tilt motor output (f) and is driven to generate rotational force, and the motor rotational force is transmitted to the seat cushion (3A) of the seat (3) through a rotating gear (e.g., spur gear, bevel gear, helical gear, worm / worm gear, etc.), thereby reducing the cushion tilt angle of the seat cushion (3A), and the reduction in the cushion tilt angle reduces the tilt angle (Y) of the seat (3), thereby lowering the lower body of the passenger to a lower position, reducing passenger movement due to impact, and further increasing safety.

[0095] In this way, it is proven that the seat posture control system (10) can further enhance passenger safety during the PSS operation range (see FIG. 5) in dangerous collision situations by driving the recline motor (41) and slide motor (42) of the multiple seat motor (40) to minimize the PSS required time and then controlling the tilt motor (43).

[0096] As described above, the active seat posture control system (10) applied to the vehicle (1) according to the present embodiment implements a seat posture control speed enhancement method in which the controller (50) confirms that the recline angle, slide movement position, and cushion tilt angle detected by each of the multiple sensors of the multiple seat sensor (30) in a dangerous collision situation detected by the vehicle environment sensor (20) of the ADAS (9) is a dangerous area by matching them with the seat safety map (60), and simultaneously controls multiple motors of the multiple seat motor (40) in combination for the seat target posture of the seat (30) to transition from the dangerous area to the safe area, thereby shortening the time required for the PSS (Pre Safety Seat) of the seat target posture in the PSS (Pre Safety Seat) operation range from danger detection to before collision. Explanation of the symbols

[0097] 1 : Vehicle 3 : Seat 3A : Seat cushion 3B : Seatback 5 : Floor Panel 7 : B Pillar 7A : Seatbelt Anchor 9: ADAS (Advanced Driver Assistance System) 10: Seat Position Control System 20: Vehicle environment sensor 30: Multi-seat sensor 31: Recline sensor 32: Slide sensor 33: Tilt sensor 40: Multi-seat motor 41: Recline motor 42: Slide motor 43 : Tilt motor 50 controller 51: Seat target position setting unit 53: Seat motor drive control unit 60: Seat Safety Map 100 : Nearby vehicles

Claims

Claim 1 The system includes a vehicle environment sensor that detects information on dangerous collision situations regarding surrounding vehicles while driving, a multi-seat sensor that detects one or more of a recline angle, a slide movement position, and a cushion tilt angle as the current seat position of the seat, a multi-seat motor that generates motor driving force to change the seat from the current seat position to a target seat position by changing one or more of the recline angle, the slide movement position, and the cushion tilt angle, and a controller that controls the motor driving force to the target seat position in a dangerous collision situation identified by the dangerous collision situation information; the controller generates motor outputs of the multi-seat motors that change from the current seat position to the target seat position; the motor outputs are divided into a recline motor output that changes the recline angle, a slide motor output that changes the slide movement position, and a tilt motor output that changes the cushion tilt angle; and for the motor outputs, the controller selects a target seat candidate that minimizes the motor operating time among a plurality of target seat candidates for a safe area from a position belonging to a current seat danger area; An active seat posture control system for a vehicle characterized by simultaneously sending the above-mentioned recline motor output and the above-mentioned slide motor output to the above-mentioned multiple seat motors to bring the seat to a target posture, and then sending the above-mentioned tilt motor output to the above-mentioned multiple seat motors to bring the seat to a target posture. Claim 2 An active seat posture control system for a vehicle according to claim 1, characterized in that the vehicle environment sensor is a component of an ADAS (Advanced Driver Assistance System). Claim 3 An active seat posture control system for a vehicle according to claim 1, wherein the multiple seat sensors are mounted on the seat and comprise a recline sensor mounted on the seat back of the seat to detect the recline angle, a slide sensor mounted on the seat cushion to detect the slide movement position, and a tilt sensor mounted on the connection portion between the seat cushion and the seat back to detect the cushion tilt angle. Claim 4 An active seat posture control system for a vehicle according to claim 1, wherein the multiple seat motors are mounted on the seat and comprise a recline motor mounted on the seat back of the seat to increase or decrease the recline angle, a slide motor mounted on the seat cushion of the seat to change the slide movement position, and a tilt motor mounted on the hinge connection between the seat cushion and the seat back to increase or decrease the cushion tilt angle. Claim 5 An active seat posture control system for a vehicle according to claim 1, wherein the controller is linked to a seat safety map that distinguishes a danger zone and a safety zone based on the backrest angle and tilt angle of the seat, and the danger zone is applied as a matching section where the current seat posture must be changed to the seat target posture. Claim 6 An active seat posture control system for a vehicle according to claim 5, wherein the controller matches the recline angle according to the slide movement position with the backrest angle and matches the cushion tilt angle with the tilt angle, and generates the motor output as a result of the matching. Claim 7 delete Claim 8 An active seat posture control system for a vehicle according to claim 5, characterized in that the controller reduces the time required for the PSS (Pre Safety Seat) of the target seat posture in the PSS (Pre Safety Seat) operation range from danger detection to before collision. Claim 9 The method is performed by a step in which a collision risk situation regarding surrounding vehicles detected by an ADAS (Advanced Driver Assistance System) while the vehicle is driving is confirmed by a controller; a map matching step in which one or more of the recline angle, slide movement position, and cushion tilt angle detected by multiple seat sensors installed on the seat are matched with a seat safety map to confirm the current seat posture, and the current seat posture is confirmed to be a danger area; a step in which a change to one or more of the recline angle, slide movement position, and cushion tilt angle is determined; and a motor driving step in which, during the PSS (Pre Safety Seat) operation range from danger detection to before a collision, multiple seat motors installed on the seat are driven and controlled to change the current seat posture to a target seat posture in a safety area; the controller generates motor outputs of the multiple seat motors that change from the current seat posture to the target seat posture; and the motor outputs are classified into a recline motor output that changes the recline angle, a slide motor output that changes the slide movement position, and a tilt motor output that changes the cushion tilt angle; A method for improving the speed of seat posture control of a vehicle, characterized in that the controller selects a target posture candidate that minimizes the motor operation time among a plurality of target posture candidates for a safe area from a posture belonging to a current seat danger area for the motor output; simultaneously sends the recline motor output and the slide motor output to the multiple seat motors to bring the seat target posture closer, and then sends the tilt motor output to the multiple seat motors to reach the seat target posture. Claim 10 A method for improving the speed of seat posture control of a vehicle according to claim 9, characterized in that the seat target posture is set as the posture of the nearest safe area to the current seat posture, which is found by analyzing the seat safety map while the seat target posture belongs to the danger area. Claim 11 A method for improving the speed of seat posture control of a vehicle according to claim 9, wherein the map matching step involves matching the recline angle according to the slide movement position to the backrest angle of the seat safety map and matching the cushion tilt angle to the tilt angle of the seat safety map, and thereby identifying the danger area and the safety area for the current seat posture as a matching result. Claim 12 A method for improving the speed of seat posture control of a vehicle according to claim 9, wherein the motor driving step is performed by a seat back angle adjustment step that changes the inclination angle of the recline angle, a seat cushion position movement step that moves the slide movement position, and a seat cushion tilt adjustment step that changes the inclination angle of the cushion tilt angle. Claim 13 A method for improving the speed of seat posture control of a vehicle according to claim 12, characterized in that the seat back angle adjustment step and the seat cushion position movement step are simultaneously controlled to reduce the time required for PSS (Pre Safety Seat) of the seat target posture. Claim 14 A method for improving the speed of seat posture control of a vehicle according to claim 12, wherein the seat back angle adjustment step is performed by a step of confirming whether the recline angle is unsatisfactory to the target for the safety area, and a step of changing the inclination angle of the recline angle by driving a recline motor provided in the seat. Claim 15 A method for improving the speed of seat posture control of a vehicle according to claim 12, wherein the seat cushion position movement step is performed by a step of confirming whether the slide movement position is a target non-satisfaction with the safety area, and a step of moving the slide movement position by driving a slide motor provided in the seat. Claim 16 A method for improving the speed of seat posture control of a vehicle according to claim 12, wherein the seat cushion tilt adjustment step is performed by a step of confirming whether the cushion tilt angle is unsatisfactory to the target for the safety area, and a step of changing the height of the cushion tilt angle by driving a tilt motor provided in the seat. Claim 17 A vehicle environment sensor that detects information on dangerous collision situations regarding surrounding vehicles while driving a vehicle. It includes a multi-seat sensor that detects one or more of a recline angle, a slide movement position, and a cushion tilt angle as the current seat posture of the seat; a multi-seat motor that generates motor driving force to change the seat from the current seat posture to a target seat posture by changing one or more of the recline angle, the slide movement position, and the cushion tilt angle; and a controller that controls the motor driving force to the target seat posture in a dangerous collision situation identified by the dangerous collision situation information; wherein the controller generates a motor output of the multi-seat motor that changes from the current seat posture to the target seat posture; and wherein the motor output is divided into a recline motor output that changes the recline angle, a slide motor output that changes the slide movement position, and a tilt motor output that changes the cushion tilt angle; An active seat posture control system for a vehicle, characterized in that the controller selects a target posture candidate that minimizes the motor operation time from among a plurality of target posture candidates for a safe area, from a posture belonging to a current seat danger area for the motor output; simultaneously sends the recline motor output and the slide motor output to the multiple seat motors to bring the seat to a target posture, and then sends the tilt motor output to the multiple seat motors to reach the target posture, wherein the multiple seat motors generate motor rotational force from the recline motor output and motor rotational force from the slide motor output together to rapidly change the angle of the backrest from the current seat posture to the target posture.

Images