CN203805834U - Supplementary restraint system of vehicle and vehicle - Google Patents

Abstract

The utility model provides a vehicle airbag system and a vehicle. The vehicle airbag system includes an acceleration sensor, an airbag electronic control module and an airbag module. The acceleration sensor and the airbag module are respectively connected with the airbag electronic control module. The vehicle airbag system also includes a plurality of thin film pressure sensors arranged at intervals along the vehicle transverse direction on the front bumper of the vehicle, and the plurality of thin film pressure sensors are electrically connected to the air bag electronic control module. The vehicle includes the vehicle airbag system. According to the vehicle airbag system of the utility model, the problem that the acceleration sensor of the existing vehicle airbag system cannot accurately judge the collision situation of the vehicle without detonating the airbag, resulting in false explosion of the airbag is solved.

Description

Vehicle safety airbag system and vehicle

technical field

The utility model relates to the technical field of safety airbags, in particular to a vehicle safety airbag system and a vehicle. the

Background technique

At present, vehicles are generally equipped with an airbag system (Supplemental Inflatable Restraint System, SRS) in the center of the steering wheel at the front of the driver, and some vehicles are also equipped with an airbag system on the top of the tool box in front of the driver's passenger seat, through which the airbag system can reduce The damage to the driver and passengers caused by the huge inertial force in the event of a frontal collision of the vehicle. the

The existing vehicle airbag system basically judges whether the vehicle collides by detecting the deceleration or inertia during the collision through an acceleration sensor (also called a collision sensor). When the vehicle collides, the acceleration sensor detects the intensity signal of the vehicle collision and inputs the signal into the airbag computer. Rapid expansion occurs. the

However, the existing vehicle airbag system has the following defects in practical application: due to the limitation of the installation position of the acceleration sensor, it is impossible to accurately judge the vehicle collision situation caused by hitting a tree, hitting a utility pole, and bumping a chassis. In the event of a vehicle collision such as hitting a tree, hitting a utility pole, or bumping a chassis, the acceleration value sent by the acceleration sensor may cause the airbag electronic control module to fail to determine whether the vehicle actually has a collision accident, and send a wrong ignition command to the airbag , causing the airbag to explode by mistake, thereby causing the vehicle to be unsafe and threatening the safe driving of the driver and passengers. the

Utility model content

The technical problem to be solved by the utility model is to provide a vehicle airbag system for the problem that the acceleration sensor of the existing vehicle airbag system cannot accurately judge the vehicle collision situation that does not need to detonate the airbag, which leads to the accidental explosion of the airbag . the

The technical solution adopted by the utility model to solve the problems of the technologies described above is as follows:

A vehicle airbag system is provided, including an acceleration sensor, an airbag electronic control module, and an airbag module, the acceleration sensor and the airbag module are respectively connected to the airbag electronic control module, and the vehicle airbag system is also It includes a plurality of thin-film pressure sensors arranged at intervals along the vehicle transverse direction on the front bumper of the vehicle, and the plurality of thin-film pressure sensors are electrically connected with the airbag electronic control module. the

Furthermore, the plurality of thin film pressure sensors are arranged on the outer side of the front bumper of the vehicle. the

Further, the plurality of thin film pressure sensors are adhered to the front bumper of the vehicle through an adhesive layer. the

Further, there are three thin film pressure sensors. the

Further, the three thin-film pressure sensors are respectively arranged on the left side, the middle part and the right side of the front bumper of the vehicle. the

Further, the acceleration sensor is a piezoresistive acceleration sensor. the

Further, the airbag electronic control module is a micro-control DSP, a micro-control ARM or a micro-control PLL. the

According to the vehicle airbag system of the present utility model, through a plurality of thin-film pressure sensors arranged at intervals along the vehicle transverse direction on the front bumper of the vehicle, the plurality of thin-film pressure sensors are electrically connected with the airbag electronic control module. Under the combined action of the thin-film pressure sensor and the acceleration sensor, it is possible to accurately determine the vehicle collision situation that does not need to detonate the airbag, thereby avoiding the accidental explosion of the airbag, and solving the problem that the acceleration sensor of the existing vehicle airbag system cannot accurately judge The problem of accidental deployment of airbags caused by vehicle collision situations that do not require the deployment of airbags. the

In addition, the utility model also provides a vehicle, which includes the above-mentioned vehicle safety airbag system. the

Description of drawings

Fig. 1 is the structural representation of the vehicle airbag system provided by an embodiment of the utility model;

Fig. 2 is a structural schematic diagram of the airbag electronic control module in the vehicle airbag system provided in Fig. 1;

Fig. 3 is the structural representation of its film pressure sensor and vehicle bumper in the vehicle airbag system that Fig. 1 provides;

FIG. 4 is a schematic structural diagram of the membrane pressure sensor in the vehicle airbag system provided in FIG. 3 . the

The reference signs in the manual are as follows:

101. Acceleration sensor; 102. Membrane pressure sensor; 103. Airbag electronic control module; 104. Airbag module; 105. Vehicle front bumper; 1031. Receiving unit; 1032. Control unit; 1033. Sending unit. the

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4 together. A vehicle airbag system provided by an embodiment of the present invention includes an acceleration sensor 101, an airbag electronic control module 103 and an airbag module 104. The acceleration sensor 101 and the airbag module 104 are respectively connected to the airbag electronic control module 103, and the vehicle airbag system also includes a plurality of film pressure sensors arranged at intervals along the vehicle transverse direction on the front bumper 105 of the vehicle 102 , the plurality of thin film pressure sensors 102 are electrically connected to the airbag electronic control module 103 . the

In this embodiment, the acceleration sensor 101 is used to collect the vehicle acceleration value, and send the collected vehicle acceleration value to the airbag electronic control module 103. Intervals are arranged on the front bumper 105 of the vehicle to detect whether the vehicle has collided, and when the vehicle is detected to collide, respectively generate collision detection signals and send them to the airbag electronic control module 103; the airbag The electronic control module 103 is connected with the acceleration sensor 101 and several thin-film pressure sensors 102, and is used to generate an ignition device according to the vehicle acceleration value sent by the acceleration sensor 101 and the detection signals sent by the plurality of thin-film pressure sensors 102 respectively. The detonation instruction of the safety airbag 104, and the detonation instruction is sent to the airbag module 104; the airbag module 104 is connected with the airbag electronic control module 103, and is used to burst. the

In this embodiment, the airbag electronic control module 103 includes a receiving unit 1031, a control unit 1032, and a sending unit 1033; the receiving unit 1031 is configured to receive the vehicle acceleration value collected by the acceleration sensor 101 and the multiple The detection signals sent by the thin film pressure sensors 102 respectively; the control unit 1032 is connected with the receiving unit 1031 to judge whether the vehicle acceleration value collected by the acceleration sensor 101 and the vehicle acceleration values collected by the several thin film pressure sensors 102 are received at the same time. When the control unit 1032 receives the vehicle acceleration value collected by the acceleration sensor 101 and the detection signals respectively sent by a plurality of thin-film pressure sensors 102, the control unit 1032 generates a detonation signal for detonating the airbag module 104. Instruction; the sending unit 1033 is connected with the control unit 1032, and is used to send the detonation instruction of the detonation of the airbag module 104 generated by the control unit 1032 to the airbag module 104. the

In this embodiment, the acceleration sensor 101 is a piezoresistive acceleration sensor. the

In this embodiment, the airbag electronic control module 103 is a micro-control DSP, a micro-control ARM or a micro-control PLL. the

In this embodiment, as shown in FIG. 3 , the plurality of thin film pressure sensors 102 are arranged on the outer side of the front bumper 105 of the vehicle. the

In this embodiment, the plurality of film pressure sensors 102 are adhered to the front bumper 105 of the vehicle through an adhesive layer. the

In this embodiment, as shown in FIG. 4 , there are three thin film pressure sensors 102 . The thin film pressure sensor 102 converts the pressure into an electrical signal and outputs it, which is generally composed of an elastic sensitive element and a displacement sensitive element (or strain gauge), wherein the function of the elastic sensitive element is to make the measured pressure act on a certain area It is converted into displacement or strain, and then converted into an electrical signal that has a certain relationship with pressure by a displacement sensitive element or strain gauge, and sometimes the functions of these two elements are integrated. the

In this embodiment, the three membrane pressure sensors 102 are respectively arranged on the left side, the middle part and the right side of the front bumper 105 of the vehicle. In this way, when a vehicle crashes into a tree, hits a utility pole, etc., at most only one film pressure sensor 102 generates an impacted detection signal, and sends the detection signal to the airbag electronic control module 103; The three membrane pressure sensors 102 will not generate the detection signal of being hit, nor will they send the detection signal to the air bag electronic control module 103; All will generate a detection signal of impact, and send respective detection signals to the airbag electronic control module 103 . the

The specific installation location, assembly and use process are described as follows. There are three membrane pressure sensors in the vehicle airbag system provided by the utility model, and the three membrane pressure sensors are respectively arranged on the left side, the middle part and the right side of the front bumper of the vehicle. On the side, the airbags are installed in the front of the car (the front and rear seats), the sides (the front and rear rows of the car) and the roof in three directions, and the acceleration sensor is usually installed between the rear of the bumper and the fender. the

The control process is described as follows. When the airbag electronic control module receives the vehicle acceleration value collected by the acceleration sensor and the detection signals sent by the three film pressure sensors at the same time, the airbag electronic control module can judge that the vehicle has actually collided. , at this time, the airbag electronic control module generates a detonation instruction for detonating the airbag, and sends the detonation instruction to the airbag, so that the airbag detonates according to the detonation instruction; when the airbag electronic When the control module does not receive the vehicle acceleration value collected by the acceleration sensor and the detection signals sent by the three film pressure sensors respectively, the airbag electronic control module can judge that the vehicle has not actually collided with the vehicle, so there is no need to generate a point detonation airbag For example, when the airbag electronic control module only receives the vehicle acceleration value sent by the acceleration sensor but does not receive the detection signals of the three thin-film pressure sensors, the airbag electronic control module can judge that the vehicle does not actually explode. A collision accident, but a vehicle chassis collision phenomenon, this is because the film pressure sensor will not send a detection signal to the airbag electronic control module when the vehicle collides with the chassis. For another example, when the airbag electronic control module receives the vehicle acceleration value sent by the acceleration sensor and also receives the detection signal sent by at most one film pressure sensor, the airbag electronic control module can determine that the vehicle has not actually collided. Instead, when a vehicle hits a tree or a utility pole, etc., at most there is only one membrane pressure sensor that sends a detection signal to the airbag electronic control module. Under the joint action of the pressure sensor and the acceleration sensor, it is possible to accurately determine the collision situation of the vehicle that does not need to detonate the airbag, so as to avoid the accidental deployment of the airbag. the

The vehicle airbag system provided by the above-mentioned embodiments of the utility model is electrically connected to the airbag electronic control module through a plurality of thin-film pressure sensors arranged on the front bumper of the vehicle at intervals along the lateral direction of the vehicle. Through the joint action of multiple thin-film pressure sensors and acceleration sensors, it is possible to accurately determine the vehicle collision situation that does not need to detonate the airbag, thereby avoiding the accidental explosion of the airbag, and solving the problem that the acceleration sensor of the existing vehicle airbag system cannot be accurate. It can accurately determine the problem of accidental deployment of airbags caused by vehicle collisions that do not require the deployment of airbags. the

In addition, the utility model also provides a vehicle, which includes the above-mentioned vehicle safety airbag system. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (8)

1. A vehicle airbag system, comprising an acceleration sensor, an airbag electronic control module and an airbag module, the acceleration sensor and the airbag module are respectively connected with the airbag electronic control module, it is characterized in that the The vehicle airbag system further includes a plurality of thin-film pressure sensors arranged on the front bumper of the vehicle at intervals along the lateral direction of the vehicle, and the plurality of thin-film pressure sensors are electrically connected to the airbag electronic control module. 2 . The vehicle airbag system according to claim 1 , wherein the plurality of thin film pressure sensors are arranged on the outer side of the front bumper of the vehicle. 3 . 3. The vehicle airbag system according to claim 1, wherein the plurality of thin film pressure sensors are adhered to the front bumper of the vehicle through an adhesive layer. 4. The vehicle airbag system according to claim 1, characterized in that there are three thin film pressure sensors. 5 . The vehicle airbag system according to claim 4 , wherein the three membrane pressure sensors are respectively arranged on the left side, the middle part and the right side of the front bumper of the vehicle. 6 . 6. The vehicle airbag system according to claim 1, wherein the acceleration sensor is a piezoresistive acceleration sensor. 7. The vehicle airbag system according to claim 1, wherein the airbag electronic control module is a micro-control DSP, a micro-control ARM or a micro-control PLL. 8. A vehicle, characterized by comprising the vehicle airbag system according to any one of claims 1-7.