阅读说明：本技术 一种安全气囊系统及控制方法 (Safety airbag system and control method ) 是由 郝玉敏 王东辉 鞠伟 郝婷婷 彭洪梅 胡海波 单宝来 于 2021-09-27 设计创作，主要内容包括：本发明属于车辆安全技术领域,公开一种安全气囊系统及控制方法。其中,安全气囊系统包括气囊、点爆装置、检测组件、位置调节组件和控制组件；检测组件用于检测车辆的速度变化、车内人员的重量及坐姿；位置调节组件与气囊连接,并用于调节气囊展开时相对于车内人员和前风窗的位置；控制组件分别与点爆装置、检测组件及位置调节组件电连接。控制组件获取检测组件的检测信息后,根据车辆的速度变化判断车辆是否发生碰撞,并在判断车辆发生碰撞时,判断车辆的碰撞强度,同时结合车内人员的重量及坐姿,来确定气囊的展开刚度以及气囊展开时的位置,并以此控制点爆装置及位置调节组件,以保证对不同重量和坐姿的车内人员都能起到有效地防护。(The invention belongs to the technical field of vehicle safety, and discloses an air bag restraint system and a control method. The safety airbag system comprises an airbag, an explosion device, a detection assembly, a position adjusting assembly and a control assembly; the detection assembly is used for detecting the speed change of the vehicle, the weight and the sitting posture of people in the vehicle; the position adjusting assembly is connected with the air bag and is used for adjusting the position of the air bag relative to the personnel in the vehicle and the front air window when the air bag is unfolded; the control assembly is electrically connected with the detonation device, the detection assembly and the position adjusting assembly respectively. After the control assembly acquires the detection information of the detection assembly, whether the vehicle collides or not is judged according to the speed change of the vehicle, the collision strength of the vehicle is judged when the vehicle is judged to collide, the unfolding rigidity of the airbag and the unfolding position of the airbag are determined by combining the weight and the sitting posture of people in the vehicle, and the ignition device and the position adjusting assembly are controlled to effectively protect the people in the vehicle with different weights and sitting postures.)

1. An airbag system, comprising:

an air bag (9) and an igniter (8);

a detection component configured to detect a change in speed of the vehicle, a weight and a sitting posture of a person in the vehicle;

the position adjusting assembly is connected with the air bag (9) and is used for adjusting the position of the air bag (9) relative to the passenger in the vehicle and a front windshield (12) when the air bag is unfolded;

and the control assembly is electrically connected with the detonation device (8), the detection assembly and the position adjusting assembly respectively.

2. The airbag system of claim 1, wherein the detection assembly comprises:

a speed detection component (1) configured for detecting a deceleration of the vehicle;

a weight detection component (3) configured to detect a weight of the person in the vehicle;

a sitting posture detection component (2) configured to detect a sitting posture of the vehicle occupant.

3. An airbag system according to claim 1 wherein the position adjustment assembly comprises a pivot assembly (18), the pivot assembly (18) being configured to be connected to the airbag (9), the pivot assembly (18) when pivoted adjusting the position of the airbag (9) when deployed relative to the occupant and the front windshield (12).

4. An airbag system according to claim 3 further comprising a drive assembly (13), the drive assembly (13) being adapted to drive the rotation assembly (18) in rotation.

5. An airbag system according to claim 4 wherein the drive assembly (13) comprises a housing and a slider (16) slidably disposed in the housing, the slider (16) being drivingly connected to the pivot assembly (18), the pressure within the housing being increased to urge the slider (16) out of the housing and cause the slider (16) to rotate the pivot assembly (18).

6. An airbag system according to claim 5 wherein an explosive assembly (14) is provided within the housing, the explosive assembly (14) causing an increase in pressure within the housing upon detonation.

7. An airbag system according to claim 3 further comprising a locking assembly (19) for locking the position of the pivot assembly (18).

8. The airbag system according to claim 7, wherein a plurality of clamping portions (181) are arranged at intervals in the circumferential direction of the rotation of the rotating assembly (18), and the locking assembly (19) comprises an elastic protruding assembly which can be selectively clamped with any one of the clamping portions (181).

9. An airbag system according to claim 3 wherein the pivot assembly (18) is configured to be pivotally mounted to an instrument panel tube beam (17).

10. A control method of an airbag system, characterized in that, with the airbag system according to any one of claims 1 to 9, the control method of the airbag system includes:

s1, detecting the speed change of the vehicle, the weight and the sitting posture of people in the vehicle by the detection component;

s2, the control component acquires the detection information of the detection component;

and S3, the control module controls the detonation moment of the detonation device (8) according to the detection information of the detection module and controls the position adjusting module to adjust the position of the airbag (9) relative to the vehicle occupant and the front windshield (12) when the airbag is unfolded.

Technical Field

The invention relates to the technical field of vehicle safety, in particular to an air bag restraint system and a control method.

Background

In order to avoid a secondary collision caused by inertia of a person in a vehicle during a traffic accident such as a collision, airbags are generally arranged in the vehicle, specifically, airbags are respectively arranged in the front (a front passenger seat), the side (a front row and a rear row in the vehicle) and the roof of the vehicle. The front airbag for the front passenger seat is placed in an instrument panel, is unfolded during a front collision, and covers the instrument panel to relieve secondary collision between a passenger in the front passenger seat and the instrument panel and a front windshield glass frame during the front collision.

Existing airbag systems sense a collision based on a change in vehicle speed. Specifically, when the vehicle is involved in a collision, the airbag controller determines the collision strength from the vehicle body deceleration signal, and thus determines the explosion timing of the airbag. When the deceleration signal detected by the deceleration sensor meets the preset condition, the safety air bag is detonated, inflated and expanded to form an elastic air cushion at the front side of a person in the vehicle, and the elastic air cushion leaks and contracts in time to absorb impact energy, so that the head and the chest of the person are protected.

It is understood that the required location of the point of explosion of the airbag is necessarily different depending on the weight of the vehicle occupant and the sitting posture of the vehicle occupant at the time of the collision. However, the explosion mode of the existing airbag in all collision modes is the same, that is, the position and rigidity of the airbag during explosion are fixed, which undoubtedly results in poor or even no protection effect on passengers in partial weight and sitting posture. In addition, the front airbag for the front passenger seat is placed in an instrument panel and is close to a front windshield, so that when the front airbag for the front passenger seat is exploded and unfolded, severe impact can be generated on the front windshield, the front windshield can be broken, the airbag can be damaged, and the protection effect on passengers on the front passenger seat is influenced.

Disclosure of Invention

An object of the present invention is to provide an airbag system which can effectively protect passengers having different weights and sitting postures and prevent the airbag from being damaged due to severe collision with a front windshield.

In order to realize the purpose, the following technical scheme is provided:

there is provided an airbag system comprising:

an airbag and squib device;

a detection component configured to detect a change in speed of the vehicle, a weight and a sitting posture of a person in the vehicle;

the position adjusting assembly is connected with the air bag and is used for adjusting the position of the air bag relative to the passenger in the vehicle and a front air window when the air bag is unfolded;

and the control assembly is electrically connected with the detonation device, the detection assembly and the position adjusting assembly respectively.

Optionally, the detection assembly comprises:

a speed detection component configured to detect a deceleration of the vehicle;

a weight detection component configured to detect a weight of the occupant in the vehicle;

a sitting posture detection component configured to detect a sitting posture of the vehicle occupant.

Optionally, the position adjustment assembly includes a rotation assembly configured to be connected to the airbag, the rotation assembly rotating to adjust a position of the airbag relative to the occupant and a front windshield when the airbag is deployed.

Optionally, the device further comprises a driving assembly, and the driving assembly is used for driving the rotating assembly to rotate.

Optionally, the driving assembly includes a housing and a sliding member slidably disposed in the housing, the sliding member is in transmission connection with the rotating assembly, and a pressure in the housing can be increased to push the sliding member to extend out of the housing and enable the sliding member to drive the rotating assembly to rotate.

Optionally, an explosive assembly is disposed within the housing, and when the explosive assembly detonates, the pressure within the housing is increased.

Optionally, a locking assembly is further included for locking the position of the rotating assembly.

Optionally, the rotation circumference interval of runner assembly is provided with a plurality of joint portions, the locking subassembly includes elasticity protrusion subassembly, elasticity protrusion subassembly selectively with arbitrary joint portion joint.

Optionally, the rotating assembly is configured to be rotatably mounted on the instrument panel tube beam.

Another object of the present invention is to provide a control method of an airbag system, which can effectively protect passengers with different weights and sitting postures, and can prevent the airbag from being damaged due to severe collision with a front windshield.

In order to realize the purpose, the following technical scheme is provided:

there is provided a control method of an airbag system employing the airbag system as described above, the control method of the airbag system including:

s1, detecting the speed change of the vehicle, the weight and the sitting posture of people in the vehicle by the detection component;

s2, the control component acquires the detection information of the detection component;

and S3, the control module controls the detonation moment of the detonation device according to the detection information of the detection module and controls the position adjusting module to adjust the position of the airbag relative to the personnel in the vehicle and the front air window when the airbag is unfolded.

The invention has the beneficial effects that:

in the safety air bag system provided by the invention, when no collision accident occurs, the air bag is in a folded state; when a collision accident occurs and the air bag needs to be opened, the explosion initiating device is started to inflate and expand the air bag; the detection assembly is used for detecting the speed change of the vehicle, the weight of people in the vehicle and the sitting posture. Whether the vehicle has collided or not can be judged according to the speed change of the vehicle. When the vehicle collides, the weight and the sitting posture of people in the vehicle are different, and the protection angle and the protection force from the air bag, which are required by the people in the vehicle, are also different. The position adjusting module is connected to the airbag and is used to adjust the position of the airbag with respect to a passenger in the vehicle (passenger seat occupant) and a front windshield when the airbag is deployed. Through adjusting the angle of the airbag relative to the personnel in the vehicle when the airbag is unfolded, the airbag can meet the protection requirements of the personnel in the vehicle with different sitting postures, and therefore effective protection is achieved. Through the angle relative to preceding wind window when adjusting the gasbag and launching, avoid when the gasbag launches too big and lead to preceding wind window damage with preceding wind window impact force, and then lead to the gasbag to be destroyed by damaged preceding wind window, guarantee the structural integrity of gasbag. The control assembly is electrically connected with the detonation device, the detection assembly and the position adjusting assembly respectively. After the control assembly acquires the detection information of the detection assembly on the speed change of the vehicle, the weight of the person in the vehicle and the sitting posture, whether the vehicle collides or not is judged according to the speed change of the vehicle, the collision strength of the vehicle is judged when the vehicle is judged to collide, and the unfolding rigidity of the air bag and the positions of the air bag relative to the person in the vehicle and a front air window when the air bag is unfolded are determined by combining the weight of the person in the vehicle and the sitting posture, so that the person in the vehicle with different weights and sitting postures can be effectively protected. Further, the control assembly determines the detonation moment and detonation mode of the detonation device according to the determined deployment rigidity of the airbag, and controls the position adjusting assembly according to the positions of the airbag relative to the vehicle occupant and the front air window during deployment.

According to the control method of the safety airbag system, after the control assembly acquires the detection information of the detection assembly on the speed change of the vehicle, the weight of the person in the vehicle and the sitting posture, whether the vehicle collides or not is judged according to the speed change of the vehicle, the collision strength of the vehicle is judged when the vehicle is judged to collide, and the unfolding rigidity of the airbag and the positions of the airbag relative to the person in the vehicle and a front air window when the airbag is unfolded are determined by combining the weight and the sitting posture of the person in the vehicle, so that the person in the vehicle with different weights and sitting postures can be effectively protected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic view of an airbag system provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of an airbag system (not exploded) provided in accordance with an embodiment of the present invention;

fig. 3 is a schematic view of an airbag system (squib) according to an embodiment of the present invention.

Reference numerals:

1. a speed detection component; 2. a sitting posture detection component; 3. a weight detection assembly; 4. an air bag controller; 5. a gateway; 6. a vehicle body controller; 7. an air bag assembly; 8. an igniter; 9. an air bag; 10. an exhaust hole; 11. an instrument panel; 12. a front windshield; 13. a drive assembly; 14. an explosive assembly; 15. a pressure relief piece; 16. a slider; 17. an instrument panel tubular beam; 18. a rotating assembly; 181. a clamping part; 19. a locking assembly; 191. a protrusion; 192. an elastic member.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, the present embodiment provides an airbag system including an airbag assembly 7, a detection component, a position adjustment component, and a control component. The airbag system of the present embodiment is mainly a front airbag for passenger operation, which is placed in the instrument panel 11, is deployed at the time of a frontal collision of the vehicle, and covers the instrument panel 11 to alleviate a secondary collision of the passenger seat occupant with the instrument panel 11 and the front windshield 12 at the time of the frontal collision.

The detection assembly is used for detecting the speed change of the vehicle, the weight of people in the vehicle and the sitting posture. Whether the vehicle has collided or not can be judged according to whether the speed of the vehicle has suddenly changed and rapidly reduced or not. When the vehicle collides, the weight and the sitting posture of the vehicle interior personnel are different, and the protection angle and the protection force from the air bag 9 required by the vehicle interior personnel are also different.

The airbag assembly 7 includes an airbag 9 and an igniter 8. When no collision accident occurs, the airbag 9 is in a folded state. When a collision accident occurs and the airbag 9 needs to be opened, the explosion device 8 is activated to inflate and deploy the airbag 9. The deployment time and the rigidity after deployment of the airbag 9 can be adjusted by controlling the detonation time and the detonation mode of the detonation device 8 so as to adapt to protection objects with different collision strengths and different weights.

The position adjusting unit is connected to the airbag 9 and is used to adjust the position of the airbag 9 with respect to a vehicle occupant (passenger) and the front windshield 12 when deployed. Through adjusting the angle of the air bag 9 relative to the personnel in the vehicle when unfolding, the air bag 9 can adapt to the protection requirements of the personnel in the vehicle with different sitting postures, thereby playing an effective protection role. Through adjusting the angle relative to the front windshield 12 when the air bag 9 is unfolded, the damage of the front windshield 12 caused by overlarge impact force between the air bag 9 and the front windshield 12 when the air bag 9 is unfolded is avoided, and then the air bag 9 is damaged by the damaged front windshield 12, so that the structural integrity of the air bag 9 is ensured.

The control component is respectively and electrically connected with the detonation device 8, the detection component and the position adjusting component. After the control assembly acquires the detection information of the detection assembly on the speed change of the vehicle, the weight of the person in the vehicle and the sitting posture, whether the vehicle collides or not is judged according to the speed change of the vehicle, the collision strength of the vehicle is judged when the vehicle is judged to collide, and the unfolding rigidity of the air bag 9 and the position of the air bag 9 relative to the person in the vehicle and the front air window 12 when the air bag 9 is unfolded are determined by combining the weight of the person in the vehicle and the sitting posture, so that the person in the vehicle with different weights and sitting postures can be effectively protected. Further, the control component determines the explosion moment and the explosion mode of the explosion device 8 according to the determined unfolding rigidity of the airbag 9, and controls the position adjusting component according to the position of the airbag 9 relative to the vehicle occupant and the front windshield 12 when being unfolded.

Optionally, the detection assembly comprises a speed detection assembly 1, a weight detection assembly 3 and a sitting posture detection assembly 2. The speed detection assembly 1 is used to detect the deceleration of the vehicle. Illustratively, the speed detection assembly 1 comprises a speed sensor, so that the installation is convenient and the detection precision is high. The weight detection assembly 3 is used for detecting the weight of people in the vehicle. Illustratively, the weight detection assembly 3 comprises a weight sensor, so that the installation is convenient and the detection precision is high. The weight detecting assembly 3 may be optionally provided on the seat. The sitting posture detection assembly 2 is used for detecting the sitting posture of people in the vehicle. Illustratively, the sitting posture detecting assembly 2 includes a camera assembly and a vision sensor. The camera shooting assembly is used for shooting or recording video of people in the vehicle. The vision sensor is used for processing image information obtained by shooting or video recording of the camera shooting assembly, and calculating characteristic quantities of the image, such as area, gravity center, length, position and the like, so as to obtain the sitting posture of people in the vehicle. The speed detection assembly 1, the weight detection assembly 3 and the sitting posture detection assembly 2 are respectively connected with the control assembly and transmit detection information to the control assembly.

The position adjusting assembly comprises a rotating assembly 18, the rotating assembly 18 is configured to be connected with the air bag 9, and when the rotating assembly 18 rotates, the position of the air bag 9 during deployment is adjusted relative to the vehicle occupant and the front windshield 12. The rotation of the airbag 9 relative to the vehicle body is achieved by means of the rotation assembly 18, so that its position relative to the vehicle occupant and the front windshield 12 is adjusted. It should be noted that the airbag 9 should be aligned with the head and chest of the vehicle occupant as much as possible on the premise that the angle between the airbag 9 and the front windshield 12 is satisfied.

Optionally, the airbag system further comprises a driving assembly 13, and the driving assembly 13 is used for driving the rotating assembly 18 to rotate, so that the position of the airbag 9 can be automatically adjusted. In this embodiment, the driving assembly 13 includes a housing and a sliding member 16 slidably disposed in the housing, and the pressure in the housing can be increased to push the sliding member 16 to extend out of the housing, so that the sliding member 16 drives the rotating assembly 18 to rotate. When the airbag 9 is detonated, the pressure in the control housing increases, causing the slider 16 to slide along and extend out of the housing to drive the rotation assembly 18 to rotate, ultimately effecting position adjustment of the deployed airbag 9.

Illustratively, an explosive assembly 14 is disposed within the housing, and upon detonation of the explosive assembly 14, the gas pressure within the housing is increased to urge the slider 16 to slide relative to the housing. The slide 16 comprises a piston, which is slidably mounted in a housing, and a piston rod, which divides the housing into a first chamber and a second chamber on either side of the piston. The piston rod is connected with the piston and is positioned in the first chamber. Explosive assembly 14 is located within the second chamber. When the explosive assembly 14 is detonated, the air pressure in the second chamber increases to push the piston and the piston rod to slide, and the volume of the second chamber decreases.

Optionally, a pressure relief member 15 is provided on the housing, and when the pressure in the housing is excessive, the pressure relief member 15 opens to vent excess gas and prevent the housing from bursting. Illustratively, the pressure relief member 15 includes a pressure relief valve, and the pressure in the housing can be adjusted by controlling the opening degree of the pressure relief valve.

Optionally, the slide 16 is connected to the rotation assembly 18 by a transmission assembly. Specifically, the transmission assembly is rotatably coupled to the slider 16 and the rotation assembly 18, respectively. The transmission assembly converts the linear motion of the slider 16 into a rotational motion and transmits it to the rotating assembly 18.

In another embodiment, a liquid medium may be introduced into the housing to increase the pressure in the housing and thereby push the slider 16 to slide.

In another embodiment, the driving assembly 13 may employ a driving member capable of actively outputting power, such as a motor, a cylinder, or an oil cylinder, and the driving member may be directly connected to the rotating assembly 18 or connected to the rotating assembly through a transmission assembly, and the rotation angle of the rotating assembly 18 is controlled by controlling the stroke or the rotation angle of the output end of the driving member.

Optionally, the airbag system further comprises a locking assembly 19 for locking the position of the rotating assembly 18 to prevent the rotating assembly 18 from rotating reversely under the reaction force of the airbag 9, resulting in a change in the position of the airbag 9.

Optionally, a plurality of clamping portions 181 are circumferentially arranged at intervals in the rotation direction of the rotating assembly 18, and the locking assembly 19 includes an elastic protruding assembly which can be selectively clamped with any one of the clamping portions 181. When the rotating assembly 18 rotates, the elastic protruding assembly is separated from the clamping parts 181, and the clamping parts 181 sequentially rotate to positions opposite to the elastic protruding assembly; when the rotating assembly 18 rotates to the right position, the elastic protruding assembly is clamped with the clamping portion 181 which is opposite to the elastic protruding assembly.

Illustratively, the locking portion 181 includes a locking slot or hole formed in the rotating member 18. The elastic projection member includes an elastic member 192 and a protrusion 191 connected. The protrusion 191 is caught in the catching groove or the catching hole by the elastic force of the elastic member 192. Further, the protrusion 191 is provided with a mating slope. When the rotating assembly 18 needs to rotate, the inner wall of the slot or the slot is in contact with the matching inclined surface and slides along the matching inclined surface to drive the protrusion 191 to overcome the elastic force of the elastic member 192 to be separated from the slot or the slot, so as to unlock the rotating assembly 18.

In other embodiments, the locking portion 181 may be a locking protrusion disposed on the rotating component 18, and a locking hole or a locking groove is correspondingly disposed on the protrusion 191, and the locking protrusion is locked in the locking hole or the locking groove to lock the rotating component 18.

Optionally, the pivot assembly 18 is configured to be pivotally mounted to the instrument panel tube beam 17. Illustratively, the rotating assembly 18 is in a ring shape, and is sleeved on the instrument panel tubular beam 17, so that the whole structure is more compact. Further, the engaging portion 181 is disposed inside the rotating assembly 18, and the locking assembly 19 is disposed on the instrument panel tubular beam 17.

In another embodiment, the positions of the locking assembly 19 and the locking portions 181 may be interchanged, that is, a plurality of locking portions 181 are disposed at intervals along the circumference of the instrument panel beam 17, and the locking assembly 19 is disposed on the inner side of the rotating assembly 18, so that the rotating assembly 18 can be locked.

In other embodiments, the rotating assembly 18 may be disposed at other suitable positions within the instrument panel, and is not limited herein.

Optionally, the control assembly includes an air bag controller 4 and a body controller 6 (BCM). The detection module is electrically connected to the airbag controller 4 to send detection information to the airbag controller 4. The airbag controller 4 is electrically connected to the vehicle body controller 6. The airbag controller 4 transmits the received detection information of the detection component to the vehicle body controller 6. The airbag controller 4 and the vehicle body controller 6 respectively determine the explosion time and the explosion mode of the explosion device 8 and the position of the airbag 9 relative to the vehicle occupant and the front windshield 12 when the airbag is deployed according to the detection information of the detection component. The airbag controller 4 and the vehicle body controller 6 both generate an explosion instruction to the explosion device 8, and as long as one of the explosion instructions is successfully received, the explosion device 8 is triggered, and the airbag 9 is inflated. The airbag controller 4 and the body controller 6 both generate activation signals to the position adjustment assembly, which is triggered as soon as one of the activation signals is received successfully.

Optionally, the air bag 9 is provided with a vent hole 10, and when the rigidity of the air bag 9 reaches saturation, the gas in the air bag 9 is gradually exhausted from the vent hole 10, so that the over-rigidity of the air bag 9 is prevented.

Optionally, signal conversion is realized between the airbag controller 4 and the vehicle body controller 6 through the gateway 5.

The present embodiment further provides a control method of an airbag system, which employs the airbag system described above, and the control method of the airbag system includes:

and S1, detecting the speed change of the vehicle, the weight and the sitting posture of the personnel in the vehicle by the detection component.

Whether the vehicle has collided or not can be judged according to the speed change of the vehicle. When the vehicle collides, the weight and the sitting posture of the vehicle interior personnel are different, and the protection angle and the protection force from the air bag 9 required by the vehicle interior personnel are also different.

Optionally, the detection assembly comprises a speed detection assembly 1, a weight detection assembly 3 and a sitting posture detection assembly 2. The speed detection assembly 1 is used to detect the deceleration of the vehicle. The weight detection assembly 3 is used for detecting the weight of people in the vehicle. The sitting posture detection assembly 2 is used for detecting the sitting posture of people in the vehicle.

And S2, the control component acquires the detection information of the detection component.

And S3, the control module controls the detonation moment of the detonation device 8 according to the detection information of the detection module and controls the position adjusting module to adjust the position of the airbag 9 relative to the passenger in the vehicle and the front windshield 12 when the airbag is unfolded.

After the control assembly acquires the detection information of the detection assembly on the speed change of the vehicle, the weight of the person in the vehicle and the sitting posture, whether the vehicle collides or not is judged according to the speed change of the vehicle, the collision strength of the vehicle is judged when the vehicle is judged to collide, and the unfolding rigidity of the air bag 9 and the position of the air bag 9 relative to the person in the vehicle and the front air window 12 when the air bag 9 is unfolded are determined by combining the weight of the person in the vehicle and the sitting posture, so that the person in the vehicle with different weights and sitting postures can be effectively protected. Further, the control component determines the explosion moment and the explosion mode of the explosion device 8 according to the determined unfolding rigidity of the air bag 9 and controls the explosion device 8 according to the determined explosion moment and the explosion mode, and the control component also controls the position adjusting component according to the determined position of the air bag 9 relative to the passenger in the vehicle and the front windshield 12 during unfolding.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.