Airbag control method and storage medium

Abstract

The application discloses an airbag control method and a computer readable storage medium for executing the method. The method comprises the following steps: a first step of determining a current vehicle speed; a second step of determining a vehicle speed compensation value based on the current vehicle speed; a third step of calculating a compensated vehicle speed based on the current vehicle speed and the vehicle speed compensation value determined in the second step; and a fourth step of igniting the airbag of the vehicle based on the compensated vehicle speed. The airbag control method according to the application can obtain a more accurate vehicle speed signal by using an airbag controller when ABS is locked, increases the accuracy of the vehicle speed used by the airbag controller, and further ensures that the corresponding airbag ignition strategy is activated correctly at different vehicle speeds, thereby reducing the possibility of airbag misfire to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of vehicle control, and more specifically, to an airbag control method and a computer storage medium for performing the method. Background Technology

[0002] An airbag is a standard safety component that must be equipped in any vehicle. Used in conjunction with seat belts, it provides effective impact protection for occupants. When an airbag deploys, the propellant inside the gas generator produces a large amount of gas. This gas is filtered and cooled before entering the airbag, causing it to rapidly deploy and break through the liner in a very short time, forming a resilient air cushion in front of the occupants, effectively protecting them from injury during a collision.

[0003] Current airbag deployment methods rely on sensors to detect the intensity of a collision to deploy the airbag, and the intensity of the collision is related to vehicle speed. Therefore, the airbag controller can estimate the intensity / severity of the collision based on the vehicle speed, and thus activate the corresponding deployment strategy.

[0004] The vehicle speed used by the airbag controller can be calculated based on the rotational speeds of the four wheels collected by the antilock braking system (ABS). However, if the ABS is activated during a collision, the wheels will lock up, resulting in an inaccurate vehicle speed calculated from the rotational speeds of the four wheels.

[0005] Current airbag control methods do not address vehicle speed in such situations. If a collision occurs while ABS is locked, the airbags may deploy unnecessarily due to inaccurate collision speed data. Summary of the Invention

[0006] This invention aims to solve the above-mentioned problems and provide an airbag control method, wherein the method includes the following steps:

[0007] First step: Determine the vehicle's current speed;

[0008] The second step: Determine the speed compensation value based on the vehicle's current speed;

[0009] The third step: Calculate the compensated vehicle speed based on the vehicle's current speed and the speed compensation value determined in the second step; and

[0010] Step 4: Deploy the vehicle's airbags based on the compensated vehicle speed.

[0011] According to an advantageous implementation, the method further includes: pre-determining a parameter database through experiments, wherein the parameter database stores the unique speed compensation value corresponding to the vehicle at different vehicle speeds.

[0012] According to an advantageous embodiment, the method further includes a fifth step performed between the first step and the second step, in which it is determined whether the current speed of the vehicle is within a first predetermined range, wherein the second step is performed only if the current speed of the vehicle is within the first predetermined range.

[0013] According to an advantageous implementation, if the vehicle's current speed is not within the first predetermined range, the vehicle's airbags are detonated based on a preset speed or the speed at which the airbags were last detonated.

[0014] According to an advantageous embodiment, the method further includes a sixth step performed between the second step and the third step, in which it is determined whether the vehicle's anti-lock braking system is activated, wherein the third step is performed only if the vehicle's anti-lock braking system is activated.

[0015] According to an advantageous embodiment, the method further includes a seventh step performed between the third and fourth steps, in which it is determined whether the compensated vehicle speed is within a second predetermined range, wherein the fourth step is performed only if the compensated vehicle speed is within the second predetermined range.

[0016] According to an advantageous embodiment, the second predetermined range includes an upper limit value, wherein if the compensated vehicle speed is higher than the upper limit value, the vehicle's airbags are detonated based on the upper limit value.

[0017] According to an advantageous embodiment, the second predetermined range further includes a lower limit value less than the upper limit value, wherein if the compensated vehicle speed is lower than the lower limit value, the vehicle's airbags are detonated based on the lower limit value.

[0018] The present invention also proposes a computer-readable storage medium storing a computer program that, when executed, implements the various steps of the airbag control method according to the present invention.

[0019] The airbag control method of the present invention can obtain a more accurate vehicle speed signal by using the airbag controller when the ABS locks up, thereby increasing the accuracy of the vehicle speed used by the airbag controller and ensuring that the corresponding airbag deployment strategy is correctly activated at different vehicle speeds, thus minimizing the possibility of accidental airbag deployment. Attached Figure Description

[0020] By incorporating the figures in this article and subsequently the appendix Figure 1 The specific embodiments used to illustrate certain principles of the invention will make other features and advantages of the method of the invention clearer or more specifically explained.

[0021] Figure 1 A flowchart illustrating the various steps of an airbag control method according to an exemplary embodiment of the present invention is shown. Detailed Implementation

[0022] The airbag control method according to the present invention will now be described with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth to enable those skilled in the art to gain a more complete understanding of the invention. However, it will be apparent to those skilled in the art that implementation of the invention may not include some of these specific details. Instead, the invention may be conceived to be practiced with any combination of the following features and elements, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are illustrative only and should not be considered as elements or limitations of the claims.

[0023] As mentioned in the background section, airbag controllers need vehicle speed information to formulate deployment strategies for different collision types. The vehicle speed information used here is calculated from the rotational speeds of the four wheels in the ABS system. However, ABS can lock up during a collision, which reduces the rotational speed of the wheels. Consequently, the airbag controller may receive a lower vehicle speed than the actual vehicle speed, leading to the triggering of an incorrect airbag deployment strategy.

[0024] Figure 1 A flowchart illustrating the various steps of an airbag control method according to an exemplary embodiment of the present invention is shown.

[0025] First, before the actual operation of the airbag control method according to the present invention, it is necessary to pre-determine the effective range of collision speed in preliminary experiments, including the effective range of detected speed [Vlow1, Vhigh1], the compensated effective speed range [Vlow2, Vhigh2], and the speed compensation value Vcsp. Figure 1 The symbol is marked as S0. Furthermore, in the preliminary experiments, it is necessary to pre-determine the detonation strategy corresponding to each vehicle speed.

[0026] In this paper, we assume that under ideal conditions, the airbag deployment condition is only affected by vehicle speed. Experiments show that the severity of a collision is directly related to vehicle speed. When the vehicle speed increases to a certain limit, the severity of the collision will continue to increase, but at this point, the airbag deployment strategy will no longer be affected by vehicle speed.

[0027] After determining the reference values ​​for vehicle speed (e.g., Vlow1, Vhigh1, Vlow2, Vhigh2, Vcsp, Vc, etc.) and the corresponding detonation strategies for different vehicle speeds in advance during the preliminary tests, the vehicle speed signal and ABS status are monitored in real time during the actual driving of the vehicle, and the effective vehicle speed for detonating the airbag is obtained according to the following steps.

[0028] Specifically, such as Figure 1 As shown, firstly, in step S1, the current vehicle speed Va is determined, which can be calculated, for example, by the airbag controller based on the rotational speeds of the four wheels provided by the ABS system.

[0029] Subsequently, in step S2, the vehicle speed compensation value Vcsp can be determined based on the vehicle's current speed Va. For example, in step S0, a parameter database can be pre-determined through experiments. This parameter database stores the unique vehicle speed compensation values ​​corresponding to different vehicle speeds. When the current wheel speed Vcsp is input into this database, the corresponding vehicle speed compensation value Vcsp can be retrieved.

[0030] After determining the corresponding speed compensation value Vcsp, in step S3, the compensated speed Vb can be calculated based on the vehicle's current speed Va and the speed compensation value Vcsp determined in step S2. Finally, in step S4, the vehicle's airbag can be detonated based on the compensated speed Vb (i.e., the compensated speed is used as the effective speed Vreff for detonating the airbag).

[0031] The above process only lists the basic operating steps of the airbag control method according to the present invention. Optionally, such as Figure 1 As shown, the method also includes step S5, which is performed between step S1 and step S2. In step S5, it is determined whether the current vehicle speed Va is within a first predetermined range [Vlow1, Vhigh1]. Step S2 is only performed if the current vehicle speed Va is within the first predetermined range. That is, the compensation value is only calculated when the input vehicle speed is within the effective range [Vlow1, Vhigh1].

[0032] If the vehicle's current speed Va is not within the first predetermined range [Vlow1, Vhigh1], then in step S8, the vehicle's airbag is detonated based on the speed at which the airbag was previously detonated or the preset speed Vc (if it is the first determination).

[0033] In addition, according to an optional embodiment, the method may further include a step S6 performed between step S2 and step S3, in which it is determined whether the vehicle's anti-lock braking system (ABS) is activated, and step S3 is performed only if the vehicle's ABS is activated.

[0034] According to another optional embodiment, the method further includes a step S7 performed between step S3 and step S4, in which it is determined whether the compensated vehicle speed Vb is within a second predetermined range [Vlow2, Vhigh2], wherein step S4 is performed only if the compensated vehicle speed Vb is within the second predetermined range.

[0035] Specifically, the second predetermined range includes an upper limit value Vhigh2 and a lower limit value Vlow2 (where the lower limit value Vlow2 is less than the upper limit value Vhigh2), wherein the compensated vehicle speed Vb is used as the effective vehicle speed Veff for detonating the airbag only when the compensated vehicle speed Vb is within the second predetermined range.

[0036] If the compensated vehicle speed Vb is higher than the upper limit Vhigh2, the vehicle's airbags will be detonated based on the upper limit Vhigh2; if the compensated vehicle speed Vb is lower than the lower limit Vlow2, the vehicle's airbags will be detonated based on the lower limit Vlow2.

[0037] The airbag control method of the present invention can obtain a more accurate vehicle speed signal by using the airbag controller when the ABS locks up, thereby increasing the accuracy of the vehicle speed used by the airbag controller and ensuring that the corresponding airbag deployment strategy is correctly activated at different vehicle speeds, thus minimizing the possibility of accidental airbag deployment.

[0038] Those skilled in the art will understand that the steps of the airbag control method according to the present invention are not limited to the order listed above. The operating method according to the present invention aims to obtain accurate vehicle speed information at the time of a vehicle collision and thereby activate the corresponding airbag deployment strategy. The order of the various operating steps, such as the order of determining whether the vehicle speed is within a predetermined range, determining whether ABS is activated, and calculating the vehicle speed compensation value, does not constitute a limitation of the present invention. For example, step S6 is not necessarily executed before step S3, but may be executed simultaneously with step S3, or after step S3. All these variations fall within the protection scope of the present invention.

[0039] Furthermore, in this invention, terms such as "comprising" and "including" indicate that, in addition to the steps directly and explicitly stated in the specification and claims, the technical solution of this application does not exclude the presence of other steps not directly or explicitly stated. Moreover, terms such as "first," "second," "third," "fourth," "fifth," "sixth," "seventh," and "eighth" do not indicate the order of units or values ​​in time, space, size, etc., but are merely used to distinguish between units or values.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not limited thereto. Any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the invention should be included within the scope of protection of the invention. Therefore, the scope of protection of the invention should be determined by the scope defined in the claims.

Claims

1. A method for controlling an airbag, characterized in that, The method involves pre-determining a parameter database through experiments, which stores unique speed compensation values ​​for the vehicle at different speeds. The method also includes the following steps: First step (S1): Determine the vehicle's current speed (Va); Second step (S2): Based on the vehicle's current speed (Va), query the parameter database to determine the speed compensation value (Vcsp) that uniquely corresponds to the vehicle's current speed (Va). The third step (S3): Calculate the compensated vehicle speed (Vb) based on the vehicle's current speed (Va) and the speed compensation value (Vcsp); and Step 4 (S4): Deploy the vehicle's airbags based on the compensated vehicle speed (Vb). The method further includes a fifth step (S5) executed between the first step and the second step, and a sixth step (S6) executed between the second step and the third step. In the fifth step, it is determined whether the current vehicle speed (Va) is within a first predetermined range, wherein the second step is executed only if the current vehicle speed (Va) is within the first predetermined range; and in the sixth step, it is determined whether the vehicle's anti-lock braking system is activated, wherein the third step is executed only if the vehicle's anti-lock braking system is activated.

2. The airbag control method according to claim 1, characterized in that, If the vehicle's current speed (Va) is not within the first predetermined range, the vehicle's airbags will be detonated based on a preset speed (Vc) or the speed at which the airbags were last detonated.

3. The airbag control method according to claim 1 or 2, characterized in that, The method further includes a seventh step (S7) performed between the third step and the fourth step, in which it is determined whether the compensated vehicle speed (Vb) is within a second predetermined range, wherein the fourth step is performed only if the compensated vehicle speed (Vb) is within the second predetermined range.

4. The airbag control method according to claim 3, characterized in that, The second predetermined range includes an upper limit value (Vhigh2), wherein if the compensated vehicle speed (Vb) is higher than the upper limit value (Vhigh2), the vehicle's airbags are detonated based on the upper limit value (Vhigh2).

5. The airbag control method according to claim 4, characterized in that, The second predetermined range also includes a lower limit (Vlow2) that is less than the upper limit (Vhigh2), wherein if the compensated vehicle speed (Vb) is lower than the lower limit (Vlow2), the vehicle's airbags are detonated based on the lower limit (Vlow2).

6. A computer-readable storage medium storing a computer program, characterized in that, When executed, the computer program performs the steps of the airbag control method according to any one of claims 1 to 5.

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