CN203739830U - Active type child safety air bag device for school buses - Google Patents

Abstract

The utility model provides an active child safety airbag device for a school bus, comprising an airbag system, an ECU, a master switch connected to the ECU, a pressure distribution sensor and a vehicle speed sensor, the pressure distribution sensor is mounted on a seat, and the airbag system includes an airbag Woven bag, air supply device, storage device, air intake control valve connected to ECU, air leakage control valve, gas pressure sensor, air intake control valve is connected with air bag woven bag and air supply device, air leakage control valve is connected with air bag woven bag and exhaust The pipeline and the storage device are located on the back of the seat back, and the gas pressure sensor is located in the woven bag of the airbag. The utility model judges whether the airbag system is working, the timing of deploying the airbag woven bag, and adjusts the air pressure in the airbag woven bag through a plurality of sensors and an ECU to provide optimal protection for child occupants. The airbag woven bag of the utility model can be used repeatedly, eliminates impact damage and burns caused by detonation, has no pollution to the environment, and is suitable for school buses, passenger cars and cars.

Description

Active Child Airbag Devices for School Buses

technical field

The utility model belongs to the field of automobile safety, in particular to an active child safety air bag device for a school bus.

Background technique

With the growth of car ownership, the number of road traffic accidents and casualties continues to increase. Among them, school bus accidents occur frequently. There are great potential safety hazards in school bus safety, which has become a social problem that plagues people today.

The structure of the occupant restraint system of the current school bus has deficiencies. In working conditions such as frontal collision or emergency braking, the only system components that can play a role are the seat, safety belt, and front seat. Most of the school buses are equipped with the two-point lap belt seat belt specified in the "Seat Belt and Restraint System for Adult Motor Vehicle Passengers" in accordance with the "Special School Bus Safety Technical Conditions" standard. Some of the better school buses are equipped with three-point seat belts, which provide only the minimum level of protection for a sedan occupant. And some school buses are not even equipped with seat belts in order to save costs. At the same time, the wearing rate of seat belts in school buses is not satisfactory, and the protective effect of seat belts has not been fully utilized. When the school bus brakes suddenly or collides, the child occupants who do not wear seat belts will be separated from the front row due to inertia. The seat suffered a secondary collision and was seriously injured.

Due to the small distance between the front and rear seats of the kindergarten school bus, the main injury site of the child occupants on the kindergarten school bus is the chest. The main reason for the excessive injury of the 5th percentile dummy on the primary and secondary school bus is that the head injury is too high. There are various shapes on the seat, and it is difficult for adult seat belts to provide comprehensive protection. There are many types of actual school bus accidents, and there are many examples of rollovers. The traditional simple seat belt restraint system cannot meet the protection requirements of child occupants under these working conditions.

At present, the research on improving the safety of school buses at home and abroad is mainly aimed at strengthening the structure of the school bus itself, using driver assistance systems, intelligent driving systems, and the use of Internet of Vehicles, and further standardizing the positioning and operation of school buses by strengthening legal management. School bus occupant restraint systems are not optimized.

Utility model content

The purpose of this utility model is to solve the shortcomings of the school bus child occupant restraint system, and provide an active child safety airbag device for school buses, which can effectively protect children of different sizes at all times during driving.

The utility model realizes above-mentioned technical purpose through following technical scheme.

The active child safety airbag device for a school bus is characterized in that it includes an airbag system, a controller (referred to as "ECU"), a main switch connected to the ECU, a pressure distribution sensor and a vehicle speed sensor, and the pressure distribution sensor is installed on the seat On the seat cushion, the vehicle speed sensor is installed on the wheel shaft. The airbag system includes an airbag woven bag, a storage device, an intake control valve, a gas discharge control valve, a gas pressure sensor, and an air supply device. The airbag woven bag can be stored in the storage device. The intake control valve and the deflation control valve are respectively used to control the intake and deflation of the air bag woven bag. The intake control valve is connected with the air supply device through the intake pipeline, and the storage device is fixed on the back of the seat back of the chair. The gas pressure sensor is located inside the woven bag of the airbag and is connected with the controller, and the air supply device is a supply device of compressed air.

Preferably, the storage device includes a coil spring and a box body, one side of the air bag woven bag is connected to the coil spring, the coil spring is installed in the box body, the other sides of the air bag woven bag are connected to the box body, the air intake control valve, the deflation The control valve and the gas pressure sensor are fixed on the box body.

Preferably, the air supply device is an air compressor.

The ECU is used to determine whether the airbag system is working, to judge the timing when the airbag woven bag starts to deploy, to control the intake control valve and the air discharge control valve to adjust the airbag woven bag to a proper state, and to cooperate with the coil spring to carry out the airbag woven bag retract; the airbag woven bag is inflated by supplying compressed air through the intake control valve to achieve the expansion of the airbag woven bag; the internal gas pressure of the airbag woven bag is adjusted by coordinating the control of the intake control valve and the deflation control valve; The coil springs work together to retract the airbag woven bag. The airbag woven bag is made of fabric with low friction coefficient, folding resistance and scratch resistance, and can be reused. When the air intake control valve is opened, the airbag woven bag is inflated; the deflation control valve is connected with the exhaust pipeline. Since compressed air is used and no gas generator is used, the deflation control valve can release the air in the airbag woven bag. The gas is vented to atmosphere.

The active child safety airbag device for a school bus of the present invention is comprehensively judged by information collected by multiple sensors, so that the active child safety airbag device for a school bus can provide optimal protection for child occupants at all times. Compared with the traditional airbag, the utility model can control the gas pressure inside the airbag woven bag to be constant in real time, will not burst when being squeezed, and can be reused; at the same time, it eliminates the impact damage caused by the detonation of the traditional airbag woven bag to the occupants and burns, eliminating the pollution of the gas generator to the environment. The utility model can also be used for passenger restraint systems in the rear row of passenger cars and cars.

Description of drawings

Fig. 1 is a structural schematic diagram of an active child safety airbag device for a school bus according to the present invention.

The reference signs are explained as follows:

1-airbag woven bag, 2-intake control valve, 3-discharge control valve, 4-coil spring, 5-box body, 6-gas pressure sensor, 7-controller, 8-vehicle speed sensor, 9-master switch, 10-pressure distribution sensor, 11-gas supply device.

Detailed ways

In order to further illustrate the technical solution of the utility model, the implementation of the utility model will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the occupants on the seat described in the utility model exert pressure on the seat, including airbag woven bag 1, intake control valve 2, air release control valve 3, coil spring 4, box body 5, gas pressure Sensor 6, ECU 7, vehicle speed sensor 8, main switch 9, pressure distribution sensor 10 and air supply device 11 are composed. The ECU7 is connected to the intake control valve 2, the leakage control valve 3, the gas pressure sensor 6, the vehicle speed sensor 8, the pressure distribution sensor 10 and the main switch 9 through different ports. The pressure distribution sensor 10 is mounted on the seat cushion for detecting the pressure of the occupant on the seat and uploading the detected pressure information to the ECU7; the vehicle speed sensor 8 is mounted on the wheel shaft for Collect the driving speed of the vehicle in real time, and upload the detected speed to the ECU7. The airbag woven bag 1, the intake control valve 2, the deflation control valve 3, the coil spring 4, the box body 5, the gas pressure sensor 6, and the air supply device 11 form an airbag system; wherein the box body 5 and the coil spring 4 are used as the airbag fabric As for the storage device of the bag 1, the box body 5 is fixed on the back of the seat back of the chair, and is used to accommodate the airbag woven bag 1 when the airbag woven bag 1 is not in use. Specifically, one side of the airbag woven bag 1 is connected with the coil spring 4, and the coil spring 4 is installed in the box body 5, and the other sides of the airbag woven bag 1 are connected with the box body 5, and the air intake control valve 2 and the deflation control valve 3 , The gas pressure sensor 6 is fixed on the box body 5 . The intake control valve 2 communicates with an air supply device 11 through an intake pipeline, and the air supply device 11 is a supply device for compressed air, such as an air compressor. The air leakage control valve 3 is connected with the exhaust pipeline, and is used for exhausting the gas inside the air bag woven bag 1 to the atmosphere.

ECU7 is the core of the whole device and can be integrated in the central controller of the vehicle. ECU7 judges whether the occupant is a child occupant according to the pressure of the occupant on the seat detected by the pressure distribution sensor 10. If the occupant is a child occupant, ECU7 makes a decision to start the pressure of the occupant on the seat of the utility model to the seat. command signal. The pressure distribution sensor 10 further detects the weight of the child occupant, and uploads it to the ECU 7, so that the ECU 7 controls the gas pressure charged into the air bag woven bag 1 according to the weight of the child occupant.

The ECU 7 judges whether the vehicle speed exceeds the set threshold through the vehicle speed sensor 8, and determines whether the airbag woven bag 1 is deployed; The gas pressure sensor 6 and the weight of the child occupant adjust the gas pressure inside the airbag woven bag 1 to the weight suitable for the current occupant, and close the intake control valve 2. When the school bus suddenly brakes or collides, the ECU7 judges the severity of the contact between the occupant and the airbag 1 according to the change of the gas pressure inside the airbag 1, adjusts the opening of the air leakage control valve 3, and adjusts the pressure of the gas inside the airbag 1 , so that the air leakage and absorption can achieve the best occupant protection effect, and at the same time prevent the occupant from secondary collision with the front seat and the internal structure of the airbag woven bag 1. When the school bus arrives at the destination, the driver manipulates the main switch 9, and the ECU 7 will control the air leakage control valve 3 to discharge the gas in the airbag woven bag 1 and pack up the airbag woven bag 1.

Claims (3)

1. school vehicle active-type child safety airbag apparatus, it is characterized in that, comprise gas-bag system, ECU(7), respectively with ECU(7) main supply switch (9) that is connected, pressure distribution sensor (10) and car speed sensor (8), described pressure distribution sensor (10) is loaded on seat support cushion, car speed sensor (8) is loaded on axletree, described gas-bag system comprise air bag knit bag (1), accommodation device, air intake control valve (2), disappointing control cock (3), gas pressure sensor (6), gas feeder (11), air bag is knitted bag (1) and can be accommodated in accommodation device, air intake control valve (2), the control cock (3) of losing heart is respectively used to control air bag and knits the air inlet of bag (1) and lose heart, described air intake control valve (2) is connected with gas feeder (11) by admission line, accommodation device is fixed on the back side of the seat support chair back, described gas pressure sensor (6) is positioned at air bag and knits bag (1) inside, and be connected with controller, described gas feeder (11) is compressed-air actuated feeding mechanism.

2. school according to claim 1 vehicle active-type child safety airbag apparatus, it is characterized in that, described accommodation device comprises wind spring (4), box body (5), one side that air bag is knitted bag (1) is connected with wind spring (4), wind spring (4) is loaded in box body (5), other limits that air bag is knitted bag (1) are connected with box body (5), and described air intake control valve (2), the control cock (3) of losing heart, gas pressure sensor (6) are fixed on box body (5).

3. school according to claim 1 vehicle active-type child safety airbag apparatus, is characterized in that, described gas feeder (11) is air compressor.