CN114148280A - Control method of safety airbag, collision protection system and vehicle - Google Patents
Control method of safety airbag, collision protection system and vehicle Download PDFInfo
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- CN114148280A CN114148280A CN202111404431.0A CN202111404431A CN114148280A CN 114148280 A CN114148280 A CN 114148280A CN 202111404431 A CN202111404431 A CN 202111404431A CN 114148280 A CN114148280 A CN 114148280A
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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
- B60R21/2334—Expansion control features
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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
- B60R21/02—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
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention provides a control method of an air bag, a collision protection system and a vehicle, wherein the control method comprises the following steps: acquiring the running speed of the vehicle acquired by a vehicle control system at the current moment; if the running speed of the self vehicle is greater than or equal to the preset running speed, acquiring the relative motion state information between the vehicle and the obstacle; judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition; if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision speed; and if the predicted collision speed is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided. According to the scheme, the problem that the airbag is mistakenly ignited due to overhigh acceleration peak value under low-speed collision can be effectively solved by increasing the running speed detection and collision risk prediction of the vehicle, so that damage is caused to passengers in the vehicle and the maintenance cost is increased.
Description
Technical Field
The invention relates to the field of automobile safety control, in particular to a control method of an air bag, a collision protection system and a vehicle.
Background
The traditional explosion control of the safety air bag depends on the signal of an acceleration sensor of a vehicle body of the safety air bag system in the collision process, and whether the safety air bag needs to be exploded or not is judged through a preset acceleration threshold value. The collision acceleration threshold is calibrated based on a large number of collision tests in the early development stage of the vehicle, and is suitable for various collision scenes.
However, when the automobile is collided, because only the collision acceleration is monitored and multiple collision scenes need to be considered for setting the threshold value of the collision acceleration, the detection error is large, and the situation of low-speed false explosion or high-speed non-explosion exists in the explosion control of the safety airbag. In real life, when the condition occurs, the air bag control system cannot effectively protect passengers in the vehicle, even the passengers in the vehicle are damaged in some collision scenes, and the maintenance cost of the vehicle is increased.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a control method for an airbag, a collision protection system and a vehicle, which can effectively solve the problems that an airbag is erroneously exploded due to an excessively high acceleration peak value in vehicle application, thereby causing damage to passengers in the vehicle and increasing maintenance cost, by adding the detection of the running speed of the vehicle and the prediction of collision risk.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
in one aspect, the present invention provides a method for controlling an airbag, including:
acquiring the running speed of the vehicle acquired by a vehicle control system at the current moment;
if the running speed of the self vehicle is greater than the preset running speed, acquiring the relative motion state information between the vehicle and the obstacle;
judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition;
if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
and if the predicted collision speed is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
In an embodiment of the application, after the obtaining of the driving speed of the vehicle acquired by the vehicle control system at the current time, the method further includes:
and if the running speed of the self vehicle is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
In an embodiment of the application, it may be provided that the predicted collision information further includes a predicted collision condition, and the method further includes:
if the predicted collision speed is greater than or equal to the preset running speed, acquiring an airbag explosion threshold corresponding to the predicted collision working condition;
acquiring collision acceleration under the condition of collision;
and if the collision acceleration is larger than the airbag detonation threshold, controlling the safety airbag to detonate.
In an embodiment of the application, it may be provided that, in the event of a crash, after the acquiring of crash acceleration, the method further includes:
and if the collision acceleration is less than or equal to the airbag detonation threshold, controlling the safety airbag not to detonate.
Optionally, the relative motion state information includes a relative distance of the vehicle from the obstacle;
the judging whether the vehicle and the obstacle have the collision risk or not according to the relative running state information by utilizing the preset collision condition comprises the following steps:
judging whether the relative distance is greater than a preset distance threshold value or not;
and if so, determining that the vehicle and the obstacle have no collision risk.
Further, the relative motion state information further includes a relative driving speed of the vehicle and the obstacle, and the determining, by using a preset collision condition, whether the vehicle and the obstacle have a collision risk according to the relative motion state information includes:
if the relative distance is smaller than or equal to the preset distance threshold value, judging whether the relative running speed is smaller than or equal to zero;
and if so, determining that the vehicle and the obstacle have no collision risk.
Further, the relative motion state information further includes a relative driving acceleration of the vehicle and the obstacle, and the determining, by using a preset collision condition, whether there is a collision risk between the vehicle and the obstacle according to the relative motion state information includes:
under the condition that the relative distance is smaller than or equal to a preset distance threshold value and the relative running speed is larger than zero, judging whether the relative acceleration is smaller than or equal to zero or not;
if the judgment result is yes, obtaining the relative braking distance between the vehicle and the obstacle;
if the relative braking distance is smaller than or equal to the relative distance, determining that the vehicle and the obstacle have no collision risk;
and if the relative braking distance is greater than the relative distance, determining that the vehicle and the obstacle have collision risks.
Further, the determining, according to the relative operation state information, whether there is a collision risk between the vehicle and the obstacle by using a preset collision condition further includes:
and if the relative distance is smaller than or equal to a preset distance threshold value, the relative speed is larger than zero, and the relative driving acceleration is larger than zero, determining that the vehicle and the obstacle have a collision risk.
In another aspect of the present application, there is provided a collision protection system, including:
the active safety control module is used for acquiring the running speed of the vehicle acquired by the vehicle control system at the current moment; if the running speed of the self vehicle is greater than or equal to a preset running speed, acquiring relative motion state information between the vehicle and an obstacle; judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition; if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
and the air bag control module is used for controlling the safety air bag not to explode under the condition that the vehicle is collided if the predicted collision speed is less than or equal to the preset running speed.
In another aspect of the present application, there is also provided a vehicle comprising a crash protection system for any one of the possible airbag control methods described above.
By adopting the technical scheme, the control method of the safety airbag, the collision protection system and the vehicle have the following beneficial effects that:
1. according to the method and the system, the self-vehicle running speed is obtained, the collision risk is pre-judged in advance by using the preset collision condition under the condition that the self-vehicle running speed is greater than or equal to the preset running speed, the predicted collision speed is estimated in advance under the condition that the collision risk exists, whether the safety airbag is ignited or not is judged again based on the predicted collision speed, and the problem that the safety airbag is ignited by mistake in the low-speed collision can be solved.
2. Due to the action of the method or the system, the vehicle can effectively solve the problems that the air bag is mistakenly exploded due to overhigh acceleration peak value of the vehicle under low-speed collision, so that passengers in the vehicle are damaged and the maintenance cost is increased.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a front-end low-speed structure crash test required by the safety index of a C-IASI China insurance automobile;
fig. 2 illustrates a method for controlling an airbag according to an embodiment of the present disclosure;
FIG. 3 is a flowchart illustrating a control process for airbag control using the method of the present application according to an exemplary embodiment of the present application;
fig. 4 is a system block diagram of a collision protection system according to an embodiment of the present application;
fig. 5 is a block diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure.
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
The present embodiment first provides a control method for an airbag, which is different from setting of an automotive SRS (Supplemental Restraint System) in the related art, and the method sets a false explosion control logic of the airbag in a manner of combining active and passive safety control, so as to implement accurate control of an explosion of the airbag.
In the related art, the explosion control of the airbag is usually performed according to an acceleration sensor mounted on a vehicle body, an acceleration signal is generated when a collision occurs, and an airbag system judges whether to explode the airbag according to the monitored acceleration signal. The acceleration judgment condition is set in such a way that in the early development stage of the vehicle, a large number of low-speed and high-speed calibration tests are carried out to obtain collision acceleration signals under each collision working condition, then the safety airbag system integrates the collision acceleration signals under all the working conditions to obtain the operation logic, and thus when the actual collision occurs, the safety airbag system confirms whether the actual collision is ignited or not according to the calibrated operation logic.
However, an important parameter for calibration is the peak value of the acceleration, and because the difference of the acceleration peak values is not very large in the low-speed condition, the problem that the acceleration peak value is too high in the low-speed collision condition, which may cause the air bag to be mistakenly ignited, can occur. This not only increases the maintenance cost, but also may cause injury to occupants in the vehicle due to the explosion of the airbag.
At present, related laws and regulations have two requirements of low speed and high speed for the requirement of passive safety of automobiles. Referring to fig. 1, fig. 1 is a schematic diagram of a collision test of a front-end low-speed structure required by the safety index of a C-IASI chinese insurance automobile, and in order to reduce maintenance cost under the working condition, an airbag is required to be unable to be ejected. In practical application, the low-speed collision speed is usually set to be 16kph, when the collision occurs, if the vehicle speed is less than or equal to 16kph, the airbag is required to be incapable of being ignited for reducing the maintenance cost, and if the vehicle speed is greater than 16kph, the airbag is required to be ignited. In view of the above, the present embodiment provides a control method of an airbag, by which the problem of erroneous explosion of the airbag at the time of a low-speed collision can be solved. The following is specifically illustrated:
referring to fig. 2, a method for controlling an airbag according to an embodiment includes:
s110, acquiring the running speed of the vehicle acquired by the vehicle control system at the current moment;
it should be noted that the driving speed of the vehicle acquired by the vehicle control System is the driving speed obtained based on the detection of the wheel speed, and is different from the driving speed perceived by the ADAS (Advanced Driver Assistance System) by fusing a camera and a radar.
S120, if the running speed of the self vehicle is greater than or equal to a preset running speed, obtaining relative motion state information between the vehicle and an obstacle;
in this embodiment, referring to the safety index requirement of the C-IASI chinese insurance automobile, high-speed running is set when the preset running speed is equal to or greater than 16kph, and low-speed running is set when the preset running speed is less than 16 kph.
S130, judging whether the vehicle and the obstacle have collision risks or not according to the relative running state information by using a preset collision condition;
in practical applications, a preset collision condition is usually set in the control algorithm of the ADAS. In this embodiment, the preset collision condition is set according to the relative operation state information, and the relative operation state information is calculated from the motion state information of the vehicle relative to the motion state information of the obstacle. The vehicle motion state information is obtained based on detection of a wheel speed by a vehicle control system, and may include a vehicle running speed and a vehicle running acceleration. The motion state information of the obstacle is set to be the motion state information of the obstacle sensed by an environment sensing sensor such as a fusion camera of the ADAS and a radar in the embodiment, and may include the driving speed, the driving acceleration and the like of the obstacle; the position information of the vehicle and the position information of the obstacle acquired by the environment perception sensor such as the amalgamation camera of the ADAS and the radar can also be set as the relative operation state information.
S140, if the judgment result is yes, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
it should be noted that the preset collision prediction model may be an algorithm model preset in the ADAS system, and may determine the working condition of the current vehicle in real time according to the vehicle ambient environment information input by the sensing system and the information of the vehicle itself to obtain predicted collision information; and the predicted collision information at the time of the predicted collision may be transmitted to the airbag system before the collision of the vehicle.
The present embodiment further provides a calculation method of the predicted collision velocity V, as shown in formula (1):
wherein a1 and V1 are respectively the running acceleration and the running speed of the vehicle acquired by the vehicle control system;
a2 and V2 are respectively the driving acceleration and the driving speed of the front obstacle collected by the ADAS system;
and s is the relative distance between the vehicle and the obstacle acquired by the ADAS system.
And S150, if the predicted collision speed is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
In this embodiment, the predicted collision information includes a predicted collision speed, and the airbag system predicts whether a low-speed collision occurs according to the predicted collision speed predicted by ADAS. If the low-speed collision is predicted, the safety air bag system controls the safety air bag not to explode.
Based on the method of the present embodiment described above, the problem of erroneous explosion of the airbag at the time of a low-speed collision can be solved by predicting the collision risk in advance using the preset collision condition in the case where the running speed of the own vehicle is equal to or higher than the preset running speed, estimating the predicted collision speed in advance in the case where there is a collision risk, and judging again whether to ignite the airbag based on the predicted collision speed.
In an embodiment of the present application, after S110, the method further includes:
and S111, if the running speed of the self vehicle is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
In practical application, the running speed of the vehicle acquired by the vehicle control system is increased due to the fact that the detected running speed based on the wheel speed is relatively accurate, when the working condition that the vehicle runs at a low speed is detected, the safety airbag control of the safety airbag system which does not respond to the working condition that the vehicle runs at the low speed can be set, and the running resources of the safety airbag system can be saved while the false explosion is avoided.
In one embodiment of the present application, the predicted collision information further includes a predicted collision condition, and the method further includes:
s151, if the predicted collision speed is larger than the preset running speed, acquiring an airbag explosion threshold corresponding to the predicted collision working condition;
s152, acquiring collision acceleration under the condition of collision;
s153, if the collision acceleration is larger than the airbag detonation threshold value, controlling the airbag to detonate.
In practical application, when the predicted collision speed of ADAS is greater than 16kph, the ADAS can be set to indicate that high-speed collision is predicted to occur; and at the moment, an environment perception sensor of the ADAS is arranged to acquire a collision working condition based on the detected collision form of the vehicle and the obstacle and a preset collision prediction model. For example, a predicted collision model of at least one collision condition of a preset column collision, a frontal collision, a side collision, or a collision at a certain angle may be established, and a corresponding relationship between the predicted collision model and an airbag detonation threshold may be established, so that the airbag system of this embodiment may predict a collision risk of a high-speed collision in response to ADAS, and control an airbag detonation when a collision acceleration greater than a preset acceleration collision threshold (airbag detonation threshold) is detected.
This embodiment sets up the air bag system and can respond to the collision operating mode when the collision takes place, call with the gasbag point that the collision operating mode corresponds explodes the threshold value to increase the relevance of acceleration and collision operating mode during the calibration, can improve the accuracy that the air bag point explodes the threshold value and markd, and then can avoid in dangerous collision scenes such as high-speed collision center pillar collision, the situation that air bag can not effective point explodes takes place.
In an embodiment of the present application, in the event of a collision, after S152, the method may further include:
and S253, if the collision acceleration is less than or equal to the airbag detonation threshold, controlling the safety airbag not to detonate.
The airbag system of the present embodiment is capable of controlling the airbag not to explode when the collision acceleration is detected to be equal to or less than a preset acceleration collision threshold (airbag explosion threshold) in response to the ADAS predicting the collision risk of a high-speed collision. Therefore, the control precision of the safety air bag system under the high-speed collision condition can be improved by predicting the collision speed and judging the acceleration during collision, and the occurrence of the false explosion condition of the safety air bag under the high-speed collision condition can be avoided.
In one embodiment of the present application, the relative motion state information includes a relative distance of the vehicle from the obstacle;
s130 further includes:
s131, judging whether the relative distance is larger than a preset distance threshold value;
and S132, if the judgment result is yes, determining that the vehicle and the obstacle have no collision risk.
In one embodiment of the present application, the relative motion state information further includes a relative driving speed of the vehicle and the obstacle, and S130 further includes:
s232, if the relative distance is smaller than or equal to the preset distance threshold, judging whether the relative driving speed is smaller than or equal to zero;
and S233, if the judgment result is yes, determining that the vehicle and the obstacle have no collision risk.
In one embodiment of the present application, the relative motion state information further includes a relative driving acceleration of the vehicle and the obstacle, and S130 further includes:
s332, judging whether the relative acceleration is smaller than or equal to zero or not under the condition that the relative distance is smaller than or equal to a preset distance threshold value and the relative running speed is larger than zero;
s333, if the judgment result is yes, obtaining the relative braking distance between the vehicle and the obstacle;
s334, if the relative braking distance is smaller than or equal to the relative distance, determining that the vehicle and the obstacle have no collision risk;
and S335, if the relative braking distance is greater than the relative distance, determining that the vehicle and the obstacle have a collision risk.
Specifically, the embodiment further provides a calculation method of the relative braking distance S, as shown in formula (2):
wherein a1 and V1 are respectively the running acceleration and the running speed of the vehicle acquired by the vehicle control system;
a2 and V2 are respectively the driving acceleration and the driving speed of the front obstacle collected by the ADAS system;
in one embodiment of the present application, S130 further includes:
s432, if the relative distance is smaller than or equal to a preset distance threshold value, the relative speed is larger than zero, and the relative driving acceleration is larger than zero, it is determined that the vehicle and the obstacle have a collision risk.
In order to more clearly illustrate the method of the present application, an example of the airbag control of a vehicle applying the airbag control method is provided as follows, and referring to fig. 3, the method specifically includes the following steps:
s1, driving the vehicle, and starting the ADAS to work;
s2, acquiring the running speed of the vehicle based on the wheel speed, which is acquired by the vehicle control system;
s3, determining whether the vehicle running speed > is 16 kph;
in the example, the preset running speed is set to be 16kph, and when the speed is not lower than 16kph, the preset running speed corresponds to a low-speed running condition, and when the speed is higher than 16kph, the preset running speed corresponds to a high-speed running condition.
S31, under the condition that the judgment result is negative, when collision occurs, the SRS responds to the signal sent by the ADAS and does not explode the air bag;
s4, if the judgment result is yes, starting the collision risk monitoring of the ADAS;
in practice, the ADAS may include a front radar mounted in front of the vehicle, a camera on the windshield, and an angular radar sensing system behind the vehicle. The vehicle can monitor the collision risk of the vehicle in real time according to the information vehicle running environment information sensed by the ADAS.
In this example, whether the vehicle and the obstacle have a collision risk is determined according to the relative operation state information by using the following preset collision conditions, specifically:
s5, judging whether the relative distance S < ═ 2m is true or not;
if the condition is not satisfied, determining that no collision risk exists under the current running working condition, and entering the next monitoring cycle; in this example, the preset distance threshold is set to be 2m, and it should be understood by those skilled in the art that this value may be determined by experiments, and the vehicle model and actual test may be adapted, which is not specifically limited in this application.
S6, judging whether the relative speed is greater than 0; if the condition is not satisfied, determining that no collision risk exists under the current running working condition, and entering the next monitoring cycle; if the condition is satisfied, go to S7;
s7, judging whether the relative acceleration is more than 0; if the condition is not satisfied, executing S71;
s71, calculating and judging whether the braking distance S is greater than the relative distance S;
if the braking distance at the current moment S is greater than the relative distance S, determining that the collision risk exists under the current driving working condition, and executing S8; if the condition is not satisfied, determining that no collision risk exists, and entering the next monitoring cycle;
s8, calculating the predicted collision speed V; refer to equation (1).
S9, judging whether the V collision speed is more than 16 kph;
in a case where the condition is not satisfied, determining that occurrence of a low-speed collision is predicted; in practical application, ADAS can be set to send a low-speed collision signal to SRS so as to trigger the control logic of SRS on collision working conditions;
and S91, when collision occurs, the SRS responds to the signal sent by the ADAS and does not explode the air bag.
In a case where the condition is satisfied, it is determined that occurrence of a high-speed collision is predicted, and:
s10, obtaining a predicted collision condition;
when a crash occurs, the SRS, in combination with information conveyed by the ADAS prior to the crash, and the crash acceleration signal at the time of the crash, ultimately resolves whether the airbag and seat belt should be detonated. The method specifically comprises the following steps:
s11, the SRS transmits, in response to the signal transmitted by the ADAS,
s12, in the event of a collision: the execution is carried out in such a way that,
the method comprises the steps that 1, an SRS receives collision condition information and calls a preset acceleration threshold corresponding to a condition;
2. acquiring acceleration when a collision occurs;
s13, when detecting that the collision acceleration is larger than the acceleration threshold, not igniting the air bag;
and S14, when the collision acceleration < ═ acceleration threshold value is detected, igniting the air bag.
In practical application, the collision working conditions can include at least one specific working condition such as column collision, frontal collision or side collision, and in the early development stage of the vehicle, the collision acceleration signals under each collision working condition are obtained by performing calibration tests under different working conditions, so that the airbag explosion threshold corresponding to the collision working conditions is determined. Therefore, through the steps, when a collision occurs, the SRS combines the collision working condition information to call the preset acceleration threshold corresponding to the working condition, and finally, whether the airbag and the safety belt are required to be ignited or not is determined by combining the collision acceleration signal when the collision occurs.
Through the above description, the control method of the airbag in this embodiment provides more judgment information to the SRS system by fusing the target acceleration, speed, relative distance and other information sensed by the camera and the radar and by combining active and passive safety control, and the SRS system can make more accurate judgment by combining the information output by the ADAS system and the information measured by the acceleration sensor, thereby greatly reducing the probability of accidental explosion of the airbag and the safety belt. In addition, a detection signal of the speed of the vehicle is added, ADAS judges whether the vehicle runs at a low speed or not, and then the signal is sent to SRS, so that the airbag can be prevented from being mistakenly ignited under the condition of low-speed collision. Through the sensing system, the collision working condition detection of the current potential collision risk can be increased, and the working condition signal is sent to the SRS system, so that the SRS can compare the current acceleration signal with the acceleration signal under the working condition calibrated by the vehicle development stage test according to the current working condition, and the application of the method can improve the accuracy of the explosion control of the safety airbag.
On the basis of the above method embodiment, this embodiment further provides a collision protection system, which includes:
the active safety control module 10 is used for acquiring the running speed of the vehicle acquired by the vehicle control system at the current moment; if the running speed of the self vehicle is greater than or equal to a preset running speed, acquiring relative motion state information between the vehicle and an obstacle; judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition; if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
the airbag control module 20 is in communication connection with the active safety control module 10, and is configured to control the airbag not to explode when the vehicle is in collision if the predicted collision speed is less than or equal to the preset running speed.
In one embodiment of the present application, the airbag control module 20 is further configured to control the airbag not to explode in case of a vehicle collision if the driving speed of the host vehicle is less than or equal to a preset driving speed.
In an embodiment of the application, the predicted collision information further includes a predicted collision condition, and the active safety control module 10 is further configured to obtain an airbag explosion threshold corresponding to the predicted collision condition if the predicted collision speed is greater than the preset running speed; the air bag control module 20 is used for collecting collision acceleration under the condition that collision occurs; and if the collision acceleration is larger than the airbag detonation threshold, controlling the safety airbag to detonate.
In one embodiment of the present application, the airbag control module 20 is further configured to control the airbag not to ignite if the crash acceleration is less than or equal to the airbag ignition threshold.
In an embodiment of the present application, the active safety control module 10 is further configured to determine whether the relative distance is greater than a preset distance threshold; the airbag control module 20 is further configured to determine that there is no collision risk between the vehicle and the obstacle if the determination result is yes.
In an embodiment of the present application, the active safety control module 10 is further configured to determine whether the relative driving speed is less than or equal to zero if the relative distance is less than or equal to the preset distance threshold; and if so, determining that the vehicle and the obstacle have no collision risk.
In an embodiment of the present application, the active safety control module 10 is further configured to determine whether the relative acceleration is less than or equal to zero or not when the relative distance is less than or equal to a preset distance threshold and the relative driving speed is greater than zero; if the judgment result is yes, obtaining the relative braking distance between the vehicle and the obstacle; the airbag control module 20 is further configured to determine that there is no collision risk between the vehicle and the obstacle if the relative braking distance is less than or equal to the relative distance; and if the relative braking distance is greater than the relative distance, determining that the vehicle and the obstacle have collision risks.
In one embodiment of the present application, the active safety control module 10 is further configured to determine that the vehicle and the obstacle are at risk of collision if the relative distance is less than or equal to a preset distance threshold, the relative speed is greater than zero, and the relative driving acceleration is greater than zero.
The system can solve the problems that when a vehicle is in high-speed collision, particularly a column collision working condition similar to the collision of trees, the longitudinal beams on the two sides of the vehicle are not directly collided, the collected acceleration peak value sometimes has a lower condition, and at the moment, the acceleration is lower, so that the safety airbag system can not be triggered to respond to the control of the collision point explosion safety airbag, the safety airbag can not be ignited, and passengers in the vehicle can not be well protected.
The present embodiment also provides a vehicle comprising a collision protection system for implementing any feasible method of the above method embodiments.
Due to the action of the method or the system, the vehicle can effectively solve the problems that the air bag is mistakenly exploded due to overhigh acceleration peak value of the vehicle under low-speed collision, so that passengers in the vehicle are damaged and the maintenance cost is increased.
The airbag control methods of the present application may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present application.
The embodiment of the present application further provides an electronic device, which includes a processor and a memory, where the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the control method of the airbag provided in the above control method embodiment. Fig. 5 is a block diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure. As shown in fig. 5, the electronic device 800 may have a relatively large difference due to different configurations or performances, and may include one or more Central Processing Units (CPUs) 810 (the processor 810 may include but is not limited to a Processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 830 for storing data, one or more storage media 820 (e.g., one or more mass storage devices) for storing applications 823 or data 822. Memory 830 and storage medium 820 may be, among other things, transient or persistent storage. The program stored in storage medium 820 may include one or more modules, each of which may include a series of instruction operations for a server. Still further, central processor 810 may be configured to communicate with storage medium 820 to execute a series of instruction operations in storage medium 820 on electronic device 800. The electronic device 800 may also include one or more power supplies 860, one or more wired or wireless network interfaces 850, one or more input-output interfaces 840, and/or one or more operating systems 821, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and so forth.
The input-output interface 840 may be used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the electronic device 800. In one example, i/o Interface 840 includes a Network adapter (NIC) that may be coupled to other Network devices via a base station to communicate with the internet. In one example, the input/output interface 840 may be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
It will be understood by those skilled in the art that the structure shown in fig. 5 is only an illustration and is not intended to limit the structure of the electronic device. For example, electronic device 800 may also include more or fewer components than shown in FIG. 5, or have a different configuration than shown in FIG. 5.
The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by operating the software programs and modules stored in the memory. The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs needed by functions and the like; the storage data area may store data created according to use of the device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory may also include a memory controller to provide the processor access to the memory.
The message processing method provided by the embodiment of the application can be executed in a mobile terminal, a computer terminal, a server or a similar operation device.
Embodiments of the present application also provide a computer-readable storage medium, where the storage medium may be disposed in a server to store at least one instruction or at least one program for implementing a message processing method in the method embodiments, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the above-mentioned airbag control method.
Alternatively, in this embodiment, the storage medium may be located in at least one network server of a plurality of network servers of a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
While the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention can be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A control method of an airbag, characterized by comprising:
acquiring the running speed of the vehicle acquired by a vehicle control system at the current moment;
if the running speed of the self vehicle is greater than or equal to a preset running speed, acquiring relative motion state information between the vehicle and an obstacle;
judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition;
if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
and if the predicted collision speed is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
2. The method according to claim 1, wherein after said obtaining the running speed of the own vehicle collected by the vehicle control system at the present moment, the method further comprises:
and if the running speed of the self vehicle is less than or equal to the preset running speed, controlling the safety airbag not to explode under the condition that the vehicle is collided.
3. The method of claim 1, wherein the predicted collision information further comprises predicted collision conditions, the method further comprising:
if the predicted collision speed is greater than the preset running speed, acquiring an airbag explosion threshold corresponding to the predicted collision working condition;
acquiring collision acceleration under the condition of collision;
and if the collision acceleration is larger than the airbag detonation threshold, controlling the safety airbag to detonate.
4. The method of claim 3, wherein after said acquiring crash acceleration in the event of a crash, the method further comprises:
and if the collision acceleration is less than or equal to the airbag detonation threshold, controlling the safety airbag not to detonate.
5. The method of claim 1, wherein the relative motion state information includes a relative distance of the vehicle from the obstacle;
the judging whether the vehicle and the obstacle have the collision risk or not according to the relative running state information by utilizing the preset collision condition comprises the following steps:
judging whether the relative distance is greater than a preset distance threshold value or not;
and if so, determining that the vehicle and the obstacle have no collision risk.
6. The method of claim 5, wherein the relative motion state information further comprises a relative travel speed of the vehicle and the obstacle, and wherein determining whether the vehicle and the obstacle are at risk of collision from the relative motion state information using a preset collision condition comprises:
if the relative distance is smaller than or equal to the preset distance threshold value, judging whether the relative running speed is smaller than or equal to zero;
and if so, determining that the vehicle and the obstacle have no collision risk.
7. The method of claim 6, wherein the relative motion state information further includes a relative travel acceleration of the vehicle and the obstacle, and wherein determining whether the vehicle and the obstacle are at risk of collision from the relative motion state information using a preset collision condition comprises:
under the condition that the relative distance is smaller than or equal to a preset distance threshold value and the relative running speed is larger than zero, judging whether the relative acceleration is smaller than or equal to zero or not;
if the judgment result is yes, obtaining the relative braking distance between the vehicle and the obstacle;
if the relative braking distance is smaller than or equal to the relative distance, determining that the vehicle and the obstacle have no collision risk;
and if the relative braking distance is greater than the relative distance, determining that the vehicle and the obstacle have collision risks.
8. The method of claim 7, wherein said determining from the relative operating state information whether the vehicle is at risk of collision with the obstacle using a preset collision condition further comprises:
and if the relative distance is smaller than or equal to a preset distance threshold value, the relative speed is larger than zero, and the relative driving acceleration is larger than zero, determining that the vehicle and the obstacle have a collision risk.
9. A collision protection system, comprising:
the active safety control module (10) is used for acquiring the running speed of the vehicle acquired by the vehicle control system at the current moment; if the running speed of the self vehicle is greater than or equal to a preset running speed, acquiring relative motion state information between the vehicle and an obstacle; judging whether the vehicle and the barrier have collision risks or not according to the relative running state information by using a preset collision condition; if so, acquiring the predicted collision information of the vehicle relative to the obstacle by using a preset collision prediction model; the predicted collision information includes a predicted collision velocity;
and the air bag control module (20) is used for controlling the air bag not to explode under the condition that the vehicle is collided if the predicted collision speed is less than or equal to the preset running speed.
10. A vehicle comprising a collision protection system for implementing a method according to any one of claims 1 to 8.
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| CN114148280B (en) | 2023-07-21 |
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