CN214874695U

CN214874695U - Active protection device of child restraint system based on AEB system

Info

Publication number: CN214874695U
Application number: CN202121170545.9U
Authority: CN
Inventors: 韩勇; 叶凡; 叶赛峰; 蔡鸿瑜; 袁小宾
Original assignee: Xiamen University of Technology
Current assignee: Xiamen University of Technology
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-11-26
Anticipated expiration: 2031-05-27

Abstract

The invention discloses an active protection device of a child restraint system based on an AEB system, which comprises a child restraint system arranged on a back row seat and used for binding and fixing a child passenger, wherein a signal receiving end of the child restraint system is electrically connected with an output end of the AEB system, whether a vehicle is impacted or not can be judged in advance through the AEB system, the child restraint system comprises a safety frame and a safety belt, the safety frame is installed and fixed on the back row seat, the safety belt is used for fixing the child passenger on the safety frame, and the active protection device is mainly used for the child restraint system fixed by adopting a three-point safety belt. The purpose is in order to solve the safety problem under above-mentioned operating mode, and provides a children restraint system initiative protection device under based on the AEB system to realize initiatively pretensioning the safety belt when monitoring AEB system and can't avoid the collision accident signal, can effectively reduce the injury to children under this kind of operating mode.

Description

Active protection device of child restraint system based on AEB system

Technical Field

The invention relates to the technical field of automobile safety, in particular to an active protection device of a child restraint system based on an AEB system.

Background

With the rapid development of active and passive safety technologies of automobiles, most automobiles are currently equipped with an active safety system AEB device. The state has come out that the related children traffic safety regulations require that children need to place a Child Restraint System (CRS) in the rear row when taking a passenger car. The child seat can greatly reduce the injury of the child in the accident when the traffic accident happens. Before accident collision that unexpected AEB can't avoid, when AEB brakes, children can receive inertia forward rush at the back row, and the safety belt carries out mechanical lock at this moment. Can't carry out the secondary at 0 moment of collision and tighten up, can't be with the tight restraint of children on children's seat, have very big potential safety hazard, can not carry out good protection to children under this kind of operating mode. If active pre-tightening can be performed before the collision moment, the injury of the collision to children can be effectively reduced. Therefore, an active protection device based on a child restraint system under an AEB system is needed.

Disclosure of Invention

The invention aims to provide an active protection device of a child restraint system based on an AEB system, so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

an active protection device of a child restraint system based on an AEB system comprises the child restraint system which is arranged on a back row seat and used for binding and fixing a child passenger, wherein a signal receiving end of the child restraint system is electrically connected with an output end of the AEB system, whether the vehicle is collided or not can be judged in advance through an AEB system, the child restraint system comprises a safety frame fixed on a back row seat and a safety belt for fixing a child passenger on the safety frame, the child restraint system also comprises a pressure sensor arranged on the back of the back row seat and used for acquiring pressure and a tension sensor arranged on the safety belt, the lower end of the safety belt is fixedly connected with the bottom of one side of the back row of seats through a lock catch, the upper end of the safety belt is connected with a winding mechanism for winding the safety belt, the winding mechanism is electrically connected with the ECU controller, and the input end of the ECU controller is electrically connected with the pressure sensor and the tension sensor.

As a further scheme of the invention: the lower end of the safety frame is provided with a leg fixing frame for fixing the legs of the child passenger.

As a further scheme of the invention: the safety frame is provided with an elastic wrapping block matched with a child passenger.

As a further scheme of the invention: the winding mechanism comprises an installation cavity arranged inside the back row of seats and a rotating shaft which is arranged in the installation cavity and is convenient for winding of the safety belt, two ends of the rotating shaft are rotatably connected with the fixed seat, and one end of the torsion spring penetrates through the fixed seat and is connected with the output end of the speed reducing motor.

As a further scheme of the invention: and a torsion spring convenient for the rotation of the rotating shaft is arranged between at least one end of the rotating shaft and the fixed seat.

As a further scheme of the invention: the winding mechanism further comprises a roller for guiding the safety belt, and two ends of the roller are rotatably arranged on the rear row of seats.

As a still further scheme of the invention: and two sides of the rotating shaft are provided with enclosing barriers for preventing the position deviation of the safety belt.

Compared with the prior art, the invention has the beneficial effects that: this application is mainly to adopting the fixed children restraint system of bikini safety belt, and the purpose is in order to solve the safety problem under the above-mentioned operating mode, and provides a children restraint system initiative protection device based on AEB system to the realization is carrying out initiative pretension to the safety belt when monitoring AEB system can't avoid the collision accident signal, can effectively reduce the injury to children under this kind of operating mode.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a winding mechanism according to the present invention;

fig. 3 is a schematic block diagram of the present invention.

Wherein: pressure sensor 1, back row seat 2, tension sensor 3, children passenger 4, children restraint system 5, safety frame 51, ECU controller 6, gear motor 7, fixing base 8, pivot 9, torsional spring 10, roller 11, hasp 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.

Referring to fig. 1-2, in an embodiment of the present invention, an active protection device of a child restraint system based on an AEB system includes a child restraint system 5 disposed on a rear seat 2 for binding and fixing a child passenger 4, a signal receiving end of the child restraint system 5 is electrically connected to an output end of the AEB system, whether a vehicle is collided or not can be judged in advance by the AEB system, the AEB system measures a distance to a front vehicle or an obstacle by using a radar, and then compares the measured distance with an alarm distance and a safety distance by using a data analysis module, and performs an alarm prompt when the distance is smaller than the alarm distance, and even if a driver does not get to step on a brake pedal when the distance is smaller than the safety distance, the AEB system is also activated to automatically brake the vehicle, thereby protecting driving for safe traveling;

the child restraint system 5 adopts corresponding pre-tightening measures according to signals sent by the AEB system, so that the child passenger 4 is more reliably fixed, active pre-tightening can be performed before the collision moment, and the injury of the collision to the child can be effectively reduced;

the child restraint system 5 comprises a safety frame 51 which is installed and fixed on a back row seat 2 and a safety belt which fixes a child passenger 4 on the safety frame, the child restraint system 5 further comprises a pressure sensor 1 which is arranged on a backrest of the back row seat 2 and used for acquiring pressure and a tension sensor 3 which is arranged on the safety belt, the lower end of the safety belt is connected and fixed with the bottom of one side of the back row seat 2 through a lock catch 12, the upper end of the safety belt is connected with a winding mechanism which is used for winding the safety belt, the winding mechanism is electrically connected with an ECU controller 6, and the input end of the ECU controller 6 is electrically connected with the pressure sensor 1 and the tension sensor 3;

as shown in fig. 3, when the ECU controller 6 receives the signal to be collided sent by the AEB, the ECU controller 6 controls the winding mechanism to quickly tighten the seat belt, so that the seat belt is tightly attached to the body surface of the child occupant 4, after the collision, the child occupant 4 will move forward under the inertia, and the tension sensor 3 on the safety belt will detect the pressing force of the safety belt to the human body, when the pressing force is greater than the set value, if the length of the webbing is still unchanged, the attachment to the child occupant 4 is too large, therefore, the winding mechanism can release the safety belt with corresponding length at the moment, so that the force applied to the child passenger 4 can be buffered, the burden on the child passenger 4 is reduced, when the child passenger 4 moves forwards, the pressure sensor 1 can detect the pressure of the child restraint system 5 on the rear seat 2, so that secondary injury caused by excessive forward movement of the child passenger 4 is avoided;

the winding mechanism comprises an installation cavity arranged inside the rear row of seats 2 and a rotating shaft 9 arranged in the installation cavity and facilitating winding of the safety belt, wherein fenders preventing the position deviation of the safety belt are arranged on two sides of the rotating shaft 9, two ends of the rotating shaft 9 are rotatably connected with the fixed seat 8, a torsion spring 10 facilitating rotation of the rotating shaft 9 is arranged between at least one end of the rotating shaft 9 and the fixed seat 8, one end of the torsion spring 10 penetrates through the fixed seat 8 and is connected with the output end of the speed reducing motor 7, the winding mechanism further comprises a rolling shaft 11 used for guiding the safety belt, and two ends of the rolling shaft 11 are rotatably arranged on the rear row of seats 2;

the working principle of the invention is as follows: the AEB signal is acquired first: an ECU controller acquires signals from a vehicle body distance measuring radar, a braking system, a steering wheel corner sensor and a trigger AEB system;

when the pre-tightening module acquires a signal which cannot be avoided through emergency braking collision, the ECU controller control circuit starts the speed reduction motor, and the motor drives the rotating shaft and the rolling shaft to roll up the safety belt for pre-tightening;

after the safety belt is pre-tightened, whether the pre-tightening degree is achieved is verified through a pressure sensor in the seat back and a tension sensor on the shoulder belt;

after the collision is finished, the pre-tightening driving module stops working, the ECU controller does not receive a dangerous starting signal, and the speed reducing motor is driven to rotate reversely, so that the safety belt is loosened, and the initial state is recovered.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.

Claims

1. A child restraint system active protection device based on an AEB system is characterized by comprising a child restraint system (5) arranged on a back row seat (2) and used for binding and fixing a child passenger (4), wherein a signal receiving end of the child restraint system (5) is electrically connected with an output end of the AEB system, whether a vehicle is impacted or not can be judged in advance through the AEB system, the child restraint system (5) comprises a safety frame (51) installed and fixed on the back row seat (2) and a safety belt for fixing the child passenger (4) on the safety frame, the child restraint system (5) further comprises a pressure sensor (1) arranged on a backrest of the back row seat (2) and used for acquiring pressure and a tension sensor (3) arranged on the safety belt, and the lower end of the safety belt is fixedly connected with the bottom of one side of the back row seat (2) through a lock catch (12), the winding mechanism that is used for the rolling safety belt is connected to the safety belt upper end, winding mechanism electric connection ECU controller (6), the input and pressure sensor (1) and tension sensor (3) electric connection of ECU controller (6).

2. The active protection device of a child restraint system based on an AEB system according to claim 1, characterized in that the lower end of the safety frame (51) is provided with a leg fixing frame for fixing the leg of the child occupant (4).

3. The active protection device of a child restraint system under AEB system according to claim 1, characterized in that the safety frame (51) is provided with an elastic wrapping block cooperating with the child occupant (4).

4. The active protection device of a child restraint system based on an AEB system according to claim 1, wherein the rolling mechanism comprises a mounting cavity arranged inside the rear seat (2) and a rotating shaft (9) arranged in the mounting cavity for facilitating the winding of a safety belt, and both ends of the rotating shaft (9) are rotatably connected with the fixed seat (8).

5. The active protection device for the child restraint system based on the AEB system of claim 4, wherein a torsion spring (10) for facilitating the rotation of the torsion spring is arranged between at least one end of the rotating shaft (9) and the fixed seat (8), and one end of the torsion spring (10) passes through the fixed seat (8) and is connected with the output end of the speed reduction motor (7).

6. The active protection device of a child restraint system based on an AEB system according to claim 4, wherein the rolling mechanism further comprises a roller (11) for guiding the safety belt, and both ends of the roller (11) are rotatably arranged on the rear row of seats (2).

7. The active protection device of a child restraint system based on an AEB system according to claim 4, wherein the two sides of the rotating shaft (9) are provided with barriers for preventing the position of the safety belt from deviating.