CN110843714B - Delayed detonation automobile safety airbag and control method thereof - Google Patents
Delayed detonation automobile safety airbag and control method thereof Download PDFInfo
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- CN110843714B CN110843714B CN201911119263.3A CN201911119263A CN110843714B CN 110843714 B CN110843714 B CN 110843714B CN 201911119263 A CN201911119263 A CN 201911119263A CN 110843714 B CN110843714 B CN 110843714B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/01516—Passenger detection systems using force or pressure sensing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01204—Actuation parameters of safety arrangents
- B60R2021/01211—Expansion of air bags
- B60R2021/01231—Expansion of air bags control of expansion timing or sequence
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The invention discloses a delayed detonation automobile safety airbag which comprises an airbag body, a collision sensor, a speed sensor, a steering angle sensor, a pressure sensor, a controller and a time delayer, wherein the airbag body comprises four parallel sub airbags; the pressure sensor is arranged on the driver cushion; the steering angle sensor is arranged on a steering column of a steering wheel, and the output end of each sensor is connected with the controller; and is connected with a gas generator in the air bag body through a time delay device; the sub-air bags can be respectively detonated in a delayed manner according to specific collision conditions, so that each key part of a human body can be protected in a targeted manner, the effective protection effect is exerted, and the secondary damage of the safety air bags to the human body is reduced as much as possible; moreover, the detonation accuracy is high, and the effective protection effect can be better played.
Description
Technical Field
The invention relates to a delayed detonation automobile safety airbag and a control method thereof.
Background
As more and more automobile safety regulations are implemented successively and the requirement of users on automobile safety is increased, the design of the whole automobile safety system becomes more and more important. When the vehicle has a frontal collision, the airbag arranged in the steering wheel and the instrument desk is bounced off when necessary, and an air wall is formed between the passenger and the vehicle body, so that the probability of injury is reduced; in real accidents, the safety airbag is inflated rapidly in a spherical shape, so that impact force generated when the airbag is inflated can cause secondary damage to drivers and passengers, and serious casualties can be caused.
Disclosure of Invention
In order to solve the defect that secondary damage is possibly caused to a driver and passengers when an air bag is expanded in the prior art, the delayed detonation automobile safety air bag and the control method thereof are provided.
A delayed detonation automobile safety airbag comprises an airbag body, a collision sensor, a speed sensor, a steering angle sensor, a pressure sensor, a controller and a time delayer;
the airbag body comprises an upper airbag positioned at the upper part, side airbags positioned at two sides and a lower airbag positioned at the lower part, wherein 4 sub-airbags are connected in parallel, and gas generators are respectively arranged in the sub-airbags; the upper air bag corresponds to the head of a human body when being detonated and mainly protects the head of the human body, the side air bags respectively correspond to the two side parts when being detonated and mainly protect the two side parts, and the lower air bag corresponds to the trunk of the human body when being detonated; especially, the thorax position is protected, because trunk position area of contact is great, lower part gasbag is as big as possible a little, can cover whole trunk comprehensively, and furthest protects thorax internal organ, and the head gasbag is less than other three sub-gasbags a little, and the purpose can reduce the impact to the head as far as possible when protecting the head. The volume of the upper air bag accounts for 8-15%, the volume of the side air bag accounts for 20-30%, and the volume of the lower air bag accounts for less than 30-50%. Preferably, the volume proportion of the upper bag is 10%, the volume proportion of the side bag is 25%, and the volume proportion of the lower bag is less than 40%.
The collision sensor and the speed sensor are both self-carried by an automobile, the pressure sensors are arranged on a cushion of a driver or a passenger, preferably, the number of the pressure sensors is 4, the pressure sensors are dispersedly arranged below a pelvis and below the middle ends of thighs and are mainly used for judging the inclination direction of a human body after collision, and when the controller detects that the signal of the pressure sensor on the right side is weakened or not, the human body is judged to incline to the left; when the controller detects that the signal of the pressure sensor on the left side is weakened or not weakened, the human body is judged to be inclined rightwards; when the controller detects that the signal of the pressure sensor below the pelvis is weakened or not weakened, the human body is judged to incline forwards; meanwhile, a steering angle sensor arranged on a steering column is matched with a pressure sensor to judge the displacement direction of the human body together, and then the triggering sequence of each sub-air bag is judged according to the inclined direction of the human body after collision.
The output ends of the collision sensor, the speed sensor, the steering angle sensor and the pressure sensor are connected with the controller; the output end of the controller is connected with the gas generator in the airbag body through the time delayer, and the controller controls the gas generator to explode successively according to signals fed back by the sensors.
The collision sensor and the speed sensor jointly form a first signal triggered by the safety airbag, whether the safety airbag reaches an opening condition is judged, and when the airbag reaches an initiation condition, explosion is triggered, for example, when the deceleration of the collision sensor is greater than A and the speed of the speed sensor is greater than B, the airbag is considered to reach the explosion condition; the steering angle sensor and the pressure sensor jointly form a second signal of the safety air bag, and the second signal is used for judging the human body displacement direction to control the triggering time of the four sub air bags.
Further, the controller divides the explosion intensity into three levels from weak to strong according to signals fed back by each sensor, wherein the first level explosion intensity is delayed for 2ms, the second level explosion intensity is delayed for 5-20ms, and the third level explosion intensity is delayed for 20-50 ms. The explosion intensity can be judged according to the deceleration signal of the collision sensor. The most ideal explosive state would be when the explosive end of the balloon is in contact with the body. If the explosion is carried out in advance, namely the explosion contacts with the human body in the process of explosion, the human body is injured, the human body moves forwards just, and the air bag acts backwards after contacting with the air bag, so that the human body is injured. If the explosion is delayed, the explosion contacts the human body during the air leakage process and may not play a role in protection. It is therefore necessary to provide a delayed explosion of the airbag. And after the air bag is exploded, the air bag can be deflated immediately. The air bag is not provided with time delay, so that the air bag is likely to have no protection effect, namely, the human body is likely to move forwards after the air bag is deflated. Because the explosion speed is far faster than the forward movement speed of the human body, time delay is needed, and therefore secondary damage of the air bag to the human body is reduced.
Further, when the controller judges that the automobile has a frontal collision according to the first signal and the second signal, the lower air bag is detonated in advance, then the air bags on the two side surfaces are detonated in a delayed mode simultaneously, and finally the upper air bag is detonated.
Further, when the controller judges that the automobile has side collision according to the first signal and the second signal, the lower air bag is detonated in advance, then the side air bag on the collision surface is detonated in a delayed mode, and then the other side air bag and the upper air bag are triggered to detonate in a delayed mode according to the collision degree.
The invention has the beneficial effects that:
the four parallel sub-air bags are arranged to perform delayed detonation according to specific collision conditions, so that each key part of a human body can be protected in a targeted manner, an effective protection effect is exerted, and secondary damage of the safety air bags to the human body is reduced as much as possible;
and secondly, the ignition accuracy of the gas generator of the safety air bag can be improved through the matching of the collision sensor, the speed sensor, the steering angle sensor, the pressure sensor, the controller and the time delay unit, and the effective protection effect is exerted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic diagram of a control method for delayed detonation of an automotive airbag in accordance with the present invention.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Examples
A delayed detonation automobile safety airbag comprises an airbag body, a collision sensor, a speed sensor, a steering angle sensor, a pressure sensor, a controller and a time delayer;
the airbag body comprises an upper airbag positioned at the upper part, side airbags positioned at two sides and a lower airbag positioned at the lower part, wherein 4 sub-airbags are connected in parallel, and gas generators are respectively arranged in the sub-airbags; the upper air bag corresponds to the head of a human body when being detonated and mainly protects the head of the human body, the side air bags respectively correspond to the two side parts when being detonated and mainly protect the two side parts, and the lower air bag corresponds to the trunk of the human body when being detonated; especially, the thorax position is protected, because trunk position area of contact is great, lower part gasbag is as big as possible a little, can cover whole trunk comprehensively, and furthest protects thorax internal organ, and the head gasbag is less than other three sub-gasbags a little, and the purpose can reduce the impact to the head as far as possible when protecting the head. In the present embodiment, the volume proportion of the upper bag is 10%, the volume proportion of the side bags is 25%, and the volume proportion of the lower bag is less than 40%.
The collision sensor and the speed sensor are both self-carried by an automobile, the pressure sensors are arranged on a cushion of a driver or a passenger, the number of the pressure sensors is 4, the pressure sensors are dispersedly arranged below a pelvis and below middle ends of thighs on the left side and the right side and are mainly used for judging the inclination direction of a human body after collision, and when the controller detects that the signal of the pressure sensor on the right side is weakened or not, the human body is judged to incline to the left; when the controller detects that the signal of the pressure sensor on the left side is weakened or not weakened, the human body is judged to be inclined rightwards; when the controller detects that the signal of the pressure sensor below the pelvis is weakened or not weakened, the human body is judged to incline forwards; meanwhile, the steering angle sensor arranged on the steering column can judge the displacement direction of the human body through the steering signal of the steering wheel and the cooperation of the pressure sensor, and determines the triggering time of each sub-safety airbag to judge the inclination direction of the human body after collision;
the output ends of the collision sensor, the speed sensor, the steering angle sensor and the pressure sensor are connected with the controller; the output end of the controller is connected with the gas generator in the airbag body through the time delayer, and the controller controls the gas generator to explode successively according to signals fed back by the sensors.
The collision sensor and the speed sensor jointly form a first signal triggered by the safety airbag, whether the safety airbag reaches an opening condition is judged, and when the airbag reaches an initiation condition, explosion is triggered, for example, when the deceleration of the collision sensor is greater than A and the speed of the speed sensor is greater than B, the airbag is considered to reach the explosion condition; the steering angle sensor and the pressure sensor jointly form a second signal of the safety air bag, and the second signal is used for judging the human body displacement direction to control the triggering time of the four sub air bags.
Further, the controller divides the explosion intensity into three levels from weak to strong according to signals fed back by each sensor, wherein the first level explosion intensity is delayed for 2ms, the second level explosion intensity is delayed for 5-20ms, and the third level explosion intensity is delayed for 20-50 ms. The explosion intensity can be judged according to the deceleration signal of the collision sensor. The most ideal explosive state would be when the explosive end of the balloon is in contact with the body. If the explosion is carried out in advance, namely the explosion contacts with the human body in the process of explosion, the human body is injured, the human body moves forwards just, and the air bag acts backwards after contacting with the air bag, so that the human body is injured. If the explosion is delayed, the explosion contacts the human body during the air leakage process and may not play a role in protection. It is therefore necessary to provide a delayed explosion of the airbag. And after the air bag is exploded, the air bag can be deflated immediately. The air bag is not provided with time delay, so that the air bag is likely to have no protection effect, namely, the human body is likely to move forwards after the air bag is deflated. Because the explosion speed is far faster than the forward movement speed of the human body, time delay is needed, and therefore secondary damage of the air bag to the human body is reduced.
When a vehicle has a collision accident, if the collision range is frontal collision, the vehicle collision sensor firstly collects collision signals and judges whether the safety airbag reaches a set threshold value by matching with the vehicle running speed collected by the speed sensor, if the set detonation condition is reached, the pressure sensor can collect and feed back the pressure change of a human body to the seat, meanwhile, the steering sensor transmits a corner signal to the controller, and the controller sends an instruction to the four time delay units according to the pressure signal and the corner signal to control the explosion time of the sub-airbag.
When the controller detects the collision signal passing through the collision sensor and the speed signal of the speed sensor, the requirement of triggering the explosion of the air bag is judged to be met. The controller judges that the automobile has front collision according to the fact that the pressure value below the pelvis is reduced or not, and meanwhile, when the rotating angle of the steering wheel is smaller than a certain value, the controller controls the lower air bag to be detonated in advance to conduct main protection on the front of a human body, then the left and right air bags are triggered and detonated in a delayed mode according to the collision degree, and finally the upper air bag is triggered and detonated to correspondingly protect the head; (stipulate that when the included angle formed between the collision point and the automobile center shaft is less than A, the automobile center shaft is considered to be a frontal collision, and when the included angle formed between the collision point and the automobile center shaft is more than or equal to A and less than or equal to B, the automobile center shaft is considered to be a front side collision.)
When the controller detects that the pressure value of one side of the left side and the pressure value of the other side of the right side are simultaneously reduced or not reduced, and the rotating angle of the steering wheel is larger than or equal to a certain value, the front side collision of the automobile is judged. Taking a left front side collision as an example, when the controller detects the first signal, the collision signal and the speed signal, and judges that the requirement for triggering the explosion of the airbag is met. The controller detects that the pressure value on the right side is reduced or absent at the same time, and meanwhile when the right corner of the steering wheel is larger than or equal to a certain value, the controller controls the time delayer of the lower sub-air bag to release a trigger instruction in advance and trigger the air bag to detonate, necessary basic protection is carried out on the main part of the human body, then the time delayer of the left air bag is controlled to release the trigger instruction, the left air bag detonates, a critical protection is carried out on the left side of the human body, particularly the head of the left side of the human body, finally the right and upper air bags are delayed to trigger the detonate according to the collision degree, and the position of. And a right-side collision occurs, and the control method is similar to the control method.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A delayed detonation automobile safety airbag comprises an airbag body, a collision sensor and a controller; the airbag body comprises an upper airbag positioned at the upper part, side airbags positioned at two sides and a lower airbag positioned at the lower part, wherein the four sub-airbags are connected in parallel, and gas generators are respectively arranged in the sub-airbags; the upper part air bag is corresponding to the head of a human body when being detonated, the side air bags are respectively corresponding to the two side parts when being detonated, and the lower part air bag is corresponding to the trunk of the human body when being detonated;
the collision sensor and the speed sensor are both carried by the automobile, and the pressure sensor is arranged on a cushion of a driver and used for judging the inclination direction of a human body after collision;
the steering angle sensor is arranged on a steering column of a steering wheel, and the displacement direction of a human body is judged by the steering signal of the steering wheel and the cooperation of the steering angle sensor and the pressure sensor to determine the triggering time of each sub-air bag;
the output ends of the collision sensor, the speed sensor, the steering angle sensor and the pressure sensor are connected with the controller; the output end of the controller is connected with the gas generator in the airbag body through the time delayer, and the controller controls the gas generator to explode successively according to signals fed back by the sensors.
2. The delayed detonation automobile airbag of claim 1, wherein the volume fraction of the upper airbag is 8-15%, the volume fraction of the side airbag is 20-30%, and the volume fraction of the lower airbag is 30-50%.
3. The control method for detonating an automotive airbag with a delay as claimed in claim 1, wherein the crash sensor and the speed sensor together form a first signal for triggering the airbag, determine whether the airbag reaches an opening condition, and trigger an explosion when the airbag reaches a detonation condition; the steering angle sensor and the pressure sensor jointly form a second signal of the safety air bag, and the second signal is used for judging the human body displacement direction to control the triggering time of the four sub air bags.
4. The method for controlling the delayed detonation of the airbag of the vehicle as claimed in claim 3, wherein the controller divides the explosion intensity into three stages from weak to strong according to the signals fed back by the sensors, wherein the first stage of the explosion intensity is delayed by 2ms, the second stage of the explosion intensity is delayed by 5-20ms, and the third stage of the explosion intensity is delayed by 20-50 ms.
5. The control method for delayed detonation of an automotive airbag as claimed in claim 3 or 4, characterized in that when the controller judges that the vehicle has a frontal collision based on the first signal and the second signal, the lower airbag is detonated in advance, then the airbags on both side surfaces are detonated with a delay at the same time, and finally the upper airbag is detonated.
6. The control method of time-lapse ignition of an airbag for an automobile according to claim 3 or 4, wherein when the controller judges that the automobile has a side collision based on the first signal and the second signal, the lower airbag is ignited in advance, then the side airbag of the collision surface is ignited in time-lapse ignition, and then the other side airbag and the upper airbag are ignited in time-lapse ignition based on the degree of collision.
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| CN201911119263.3A CN110843714B (en) | 2019-11-15 | 2019-11-15 | Delayed detonation automobile safety airbag and control method thereof |
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| CN201911119263.3A CN110843714B (en) | 2019-11-15 | 2019-11-15 | Delayed detonation automobile safety airbag and control method thereof |
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| CN110843714B true CN110843714B (en) | 2020-11-24 |
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| DE102005062849A1 (en) * | 2005-12-23 | 2007-09-06 | Takata-Petri Ag | Occupant restraint device for a motor vehicle |
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