CN112776746A - Pedestrian protection system and method - Google Patents
Pedestrian protection system and method Download PDFInfo
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- CN112776746A CN112776746A CN202110119576.XA CN202110119576A CN112776746A CN 112776746 A CN112776746 A CN 112776746A CN 202110119576 A CN202110119576 A CN 202110119576A CN 112776746 A CN112776746 A CN 112776746A
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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
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R21/36—Protecting non-occupants of a vehicle, e.g. pedestrians using airbags
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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
- B60R2021/0002—Type of accident
- B60R2021/0004—Frontal collision
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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
- B60R2021/01013—Means for detecting collision, impending collision or roll-over
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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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Abstract
The invention provides a pedestrian protection system and a pedestrian protection method, relates to the field of vehicle front bumper airbags, and aims to solve the technical problem of how to prevent the pedestrian from being over-protected when a vehicle collides with the pedestrian. The method comprises the steps of judging whether pedestrians exist within a preset distance, predicting a collision area, judging the relative speed of the vehicle and the pedestrians, and adopting different point explosion strategies according to the number of the pedestrians.
Description
Technical Field
The invention relates to the field of vehicle front bumper airbags, in particular to a pedestrian protection system and method.
Background
Although the probability of collision between a vehicle and a pedestrian is not high, once the collision occurs, the collision with the front position of the vehicle has high probability, and serious damage is caused to the pedestrian.
In order to avoid excessive damage to pedestrians when a vehicle collides with a pedestrian, some people propose to install an airbag on a front bumper of the vehicle, and for example, chinese patent document application No. CN202010935360.6 discloses a pedestrian protection method, apparatus, device and medium, the method includes obtaining video information shot by a front camera of the vehicle, identifying a shot object in the video information, and classifying the shot object; receiving collision force information sent by a collision sensor, when the collision force information exceeds a preset threshold value, acquiring the type of a shooting object in the current video information, judging whether the type of the shooting object is a pedestrian entrance, and if so, controlling the pedestrian protection hood to bounce according to the collision force information.
Although the above-mentioned patent can play the effect of protection pedestrian, no matter how much pedestrian's quantity all can launch the gasbag completely, the gasbag is disposable article, just needs to change after the use, and the gasbag that launches completely can lead to the rate of utilization of gasbag not high enough, therefore current gasbag can produce the excess protection to the pedestrian, has reduced the rate of utilization of gasbag.
Disclosure of Invention
The invention provides a pedestrian protection system and a pedestrian protection method aiming at the problems in the prior art, and solves the technical problem of how to prevent the pedestrian from being over-protected when a vehicle collides with the pedestrian.
The invention is realized by the following technical scheme: a pedestrian protection system is characterized by comprising an air bag, a sensing module and a control unit, wherein the sensing module is used for monitoring and outputting pedestrian movement tracks and people number information within a preset distance in real time, the control unit is used for receiving the pedestrian movement tracks and the people number information, the air bag comprises at least two cavities, the sensing module is connected with the input end of the control unit, the air bag is connected with the output end of the control unit, the control unit is also used for predicting a collision area of the pedestrian and the vehicle according to the pedestrian motion trail information and acquiring the number information of the pedestrian when the collision area of the pedestrian and the vehicle is at the front end of the vehicle, the control unit is also used for controlling all the cavities of the air bag to explode at the same time when the number of the pedestrians is two or more, the control unit is also used for predicting the positions of collision points of pedestrians and vehicles in a specific area at the front end of the vehicle when the number of pedestrians is less than two, and controlling the air bag to explode the corresponding cavity according to the predicted positions of the collision points.
When a sensing module monitors that a pedestrian exists in a preset distance, a pedestrian motion track and pedestrian number information in the preset distance are output to a control unit in real time, the control unit predicts a collision area of the pedestrian and a vehicle after receiving the pedestrian motion track information, the control unit acquires the pedestrian number information when the collision area of the pedestrian and the vehicle is at the front end of the vehicle, the control unit controls all cavities of an air bag to explode at the same time when the number of the pedestrian is two or more, the control unit predicts the position of a collision point of the pedestrian and the vehicle in a specific area at the front end of the vehicle when the number of the pedestrian and the vehicle is less than two, the control unit controls the air bag to explode at the same time corresponding to the point according to the position of the collision point of the pedestrian and the vehicle at the front end of the vehicle, the air bag is usually completely expanded at the front end of the vehicle, the expansion of the air bag is disposable, and the waste of the use of the air bag is caused, and the airbag is divided into at least two cavities, and the airbag is controlled to explode corresponding cavities in a specific area at the front end of the vehicle according to the position of a predicted collision point of the pedestrian, so that the pedestrian can be protected from being injured due to the size of the airbag, the pedestrian is prevented from being protected by the airbag, unnecessary cost of a vehicle owner on the airbag is reduced, and the accuracy and the utilization rate of the airbag explosion are improved.
In the pedestrian protection system, the sensing module comprises an environment sensing unit for monitoring whether pedestrians exist in a preset distance and a laser radar for tracking the number of the pedestrians and the movement track of the pedestrians, the environment sensing unit monitors whether the pedestrians exist in the preset distance, if the pedestrians exist in the preset distance, a sensing signal is output to the control unit, the laser radar tracks the number of the pedestrians and the movement track of the pedestrians and outputs the movement track of the pedestrians to the control unit, the control unit receives the sensing signal and then acquires the pedestrian movement track information output by the laser radar, the control unit predicts the collision area of the pedestrians according to the pedestrian movement track information and acquires the number information of the pedestrians when the collision area of the pedestrians is predicted in the front end area of the vehicle, if the number of the pedestrians is two or more, the control unit controls all cavities of the airbag to explode at the same time, and if the number of the pedestrians, the control unit predicts the collision point position of the pedestrian and the vehicle in a specific area at the front end of the vehicle and then controls the air bag to explode the corresponding cavity according to the predicted collision point position, the environment sensing unit and the laser radar can accurately determine the information of the pedestrian, and the accuracy of the air bag explosion is improved.
In above-mentioned pedestrian protection system, the environmental perception unit is including being used for the daytime monitoring to predetermine whether there is pedestrian's monocular camera in the distance and being used for evening monitoring to predetermine whether there is pedestrian's infrared camera in the distance, daytime with the monocular camera and evening change to use infrared camera monitoring can accurate judgement whether have pedestrian in predetermineeing the distance, prevent that monocular camera or two mesh cameras can't detect the pedestrian evening, improve the accuracy to pedestrian's monitoring, improve the accuracy that the gasbag point explodes.
The invention also comprises the following scheme: a pedestrian protection method, characterized in that the method comprises the steps of:
monitoring whether a pedestrian exists in a preset distance, and monitoring the movement track of the pedestrian and the information of the number of the pedestrians in the preset distance in real time when the pedestrian exists in the preset distance and outputting the information to the control unit;
the control unit predicts a collision area of the pedestrian and the vehicle according to the pedestrian motion track information, acquires pedestrian number information when the collision area of the pedestrian and the vehicle is predicted to be in a front end area of the vehicle, controls all cavities of the air bag to explode at the same time if the number of the pedestrian is two or more, predicts that the collision point of the pedestrian and the vehicle is in a specific area of the front end of the vehicle if the number of the pedestrian is two or less, and controls the air bag to explode corresponding cavities according to the predicted collision point.
The sensing module detects whether a pedestrian exists in a preset distance, when the sensing module monitors that the pedestrian exists in the preset distance, the sensing module outputs a pedestrian motion track and pedestrian number information in the preset distance to the control unit in real time, the control unit predicts a collision area of the pedestrian and a vehicle after receiving the pedestrian motion track information, when the collision area of the pedestrian and the vehicle is at the front end of the vehicle, the control unit acquires the pedestrian number information, when the number of the pedestrian is two or more, the control unit controls all cavities of the air bag to explode at the same time, when the number of the pedestrian is less than two, the control unit predicts the position of the collision point of the pedestrian and the vehicle to be in a specific area at the front end of the vehicle, the control unit controls the air bag to explode corresponding cavities according to the position of the collision point of the pedestrian and the vehicle at the front end of the vehicle, the invention controls the air bag to explode corresponding cavities according to the specific position of, the size that makes vehicle gasbag expand can protect the pedestrian not be injured just, has prevented vehicle gasbag to pedestrian's excess protection, improves accuracy and the utilization ratio that the gasbag explodes.
In the pedestrian protection method, the pedestrian number information is obtained when the collision region of the pedestrian and the vehicle is predicted at the front end of the vehicle and the relative speed of the pedestrian and the vehicle is also judged, the accuracy of predicting the specific time of collision between the vehicle and the pedestrian can be improved by judging the relative speed of the vehicle and the pedestrian, and the accuracy of explosion of the airbag cavity is improved.
In the pedestrian protection method, the controlling of the airbag to explode the corresponding cavity includes:
if the pedestrian collision point is predicted to be in the left area of the front end of the vehicle, controlling the left cavity and the middle cavity of the airbag to explode;
if the pedestrian collision point is predicted to be in the central area of the front end of the vehicle, controlling the cavity in the airbag to explode;
and if the pedestrian collision point is predicted to be in the right area of the front end of the vehicle, controlling the right cavity and the middle cavity of the air bag to explode.
The control unit controls the left cavity and the middle cavity of the airbag to explode, when the pedestrian collision point is located in the middle side area, the control unit controls the middle cavity of the airbag to explode, when the pedestrian collision point is located in the right side area, the control unit controls the right cavity and the middle cavity of the airbag to explode, and the airbag which is suitable for protecting the size of the pedestrian is unfolded according to the collision point to prevent the pedestrian from being over-protected.
In the above-described pedestrian protection method, the left area may include a region of-200 to-600 mm of the front end of the vehicle with the vehicle center as a reference, the center area may include a region of-200 to 200mm of the front end of the vehicle with the vehicle center as a reference, and the right area may include a region of 200 to 600mm of the front end of the vehicle with the vehicle center as a reference, and dividing the left area, the center area, and the right area in the form of coordinates with the vehicle center as a reference may improve accuracy of prediction.
In the pedestrian protection method, if the relative speed of the pedestrian and the vehicle is not greater than the preset speed when the relative speed of the pedestrian and the vehicle is judged, the relative speed of the pedestrian and the vehicle is kept monitored until the relative speed of the pedestrian and the vehicle is greater than the preset speed, when the relative speed of the pedestrian and the vehicle is not greater than the preset speed, the relative speed of the pedestrian and the vehicle is continuously monitored until the relative speed of the pedestrian and the vehicle is greater than the preset speed, when the relative speed of the vulnerable road and the vehicle is less than the preset speed, the pedestrian and the vehicle do not collide with each other in time, and the accuracy of airbag detonation can be improved.
In the pedestrian protection method, when the predicted collision region between the pedestrian and the vehicle is not in the vehicle front end region at the time of predicting the collision region between the pedestrian and the vehicle, the prediction is maintained for the collision region between the pedestrian and the vehicle until the collision region between the pedestrian and the vehicle is in the vehicle front end, and when the predicted collision region is not in the vehicle front end, the probability of collision between the pedestrian and the vehicle is low, and the accuracy of airbag explosion is improved.
In the pedestrian protection method, if no pedestrian exists in the preset distance when monitoring whether the pedestrian exists in the preset distance or not in the step, the area in the preset distance is monitored until the pedestrian exists, the possibility of collision can be generated only when the pedestrian exists in the preset distance, and whether the pedestrian exists in the preset distance or not is monitored, so that the accuracy of airbag explosion of the method is improved.
Compared with the prior art, the pedestrian protection method and the pedestrian protection system have the following advantages:
1. the invention controls the airbag to explode the corresponding cavity in the specific area at the front end of the vehicle according to the position of the predicted collision point of the pedestrian, so that the size of the airbag of the vehicle is proper, the pedestrian is prevented from being over-protected by the airbag of the vehicle, and the utilization rate of the airbag is improved.
2. The method can accurately judge the specific time of collision between the vehicle and the pedestrian by judging the relative speed of the vehicle and the pedestrian, and improve the accuracy of explosion of the airbag cavity.
Drawings
FIG. 1 is a schematic view of a pedestrian protection system architecture;
fig. 2 is a schematic view of a pedestrian protection method.
In figure 1, a sensing module; 11. an environment sensing unit; 12. a laser radar; 111. a monocular camera; 112. an infrared camera; 2. a control unit; 3. an air bag; 31. a left cavity; 32. a middle cavity; 33. and a right cavity.
Detailed Description
In order to make the technical problems, technical solutions and advantages solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the pedestrian protection system includes: control unit 2, perception module 1 and gasbag 3, perception module 1 includes environment perception unit 11 and lidar 12, and environment perception unit 11 includes monocular camera 111 and infrared camera 112, and monocular camera 111, infrared camera 112 and lidar 12 all are connected with control unit 2 input, and gasbag 3 is connected with control unit 2 output.
The air bag 3 of the invention comprises a mounting box, a left cavity 31 air generator, a middle cavity 32 air generator, a right cavity 33 air generator, a left cavity 31 air bag, a middle cavity 32 air bag and a right cavity 33 air bag, wherein the left cavity 31 air generator is connected with the left cavity 31 air bag, the middle cavity 32 air generator is connected with the middle cavity 32 air bag, the right cavity 33 air bag is connected with the right cavity 33 generator, the left cavity 31 air generator, the middle cavity 32 air generator and the right cavity 33 air generator are all connected with a control unit, the left cavity 31 air generator, the middle cavity 32 air generator and the right cavity 33 air generator are all arranged in the mounting box, the left cavity 31 air bag, the middle cavity 32 air bag and the right cavity 33 air bag are simultaneously exploded and then shaped like T, the single air generator has the inflation quantity of 50-80L, and the 150-L volume filling of the air bag can be realized after combination, the thickness of the middle cavity filling area of the air bag is 180-200mm, and the thickness of the left and right cavity filling areas is 80-100 mm.
The sensing module 1 monitors whether a pedestrian exists in a preset distance, when the sensing module 1 monitors that the pedestrian exists in the preset distance, the pedestrian motion track and the number information in the preset distance are output to the control unit 2 in real time, the control unit 2 predicts the collision area of the pedestrian and the vehicle after receiving the pedestrian motion track information, the control unit 2 acquires the number information of the pedestrian when the collision area of the pedestrian and the vehicle is in the front end area of the vehicle, the control unit 2 controls all cavities of the air bags 3 to explode at the same time when the number of the pedestrian is two or more, the control unit 2 predicts the specific area of the collision point of the pedestrian and the vehicle at the front end of the vehicle when the number of the pedestrian is two or less, and the control unit 2 controls the air bags 3 to explode corresponding cavities according to the positions of the collision point of the.
Generally, the airbag 3 is completely unfolded when a pedestrian collides with a vehicle at the front end of the vehicle, the airbag 3 is unfolded once, which causes waste in use of the airbag 3, and the conventional method for solving the problem is that a control unit calculates the collision strength to deliver a predetermined volume of gas to the airbag 3 at a predetermined rate, so that the airbag 3 is unfolded to a proper size, if the pedestrian is too close to the vehicle, the airbag 3 is divided into three cavities, according to the predicted pedestrian collision point, the airbag 3 is controlled to explode a corresponding cavity in the specific area of the front end of the vehicle, so that the pedestrian can be protected from being injured by the size of the airbag 3, the pedestrian is prevented from being protected by the airbag, unnecessary cost of a vehicle owner on the airbag 3 is reduced, and the accuracy and the utilization rate of the airbag 3 explosion are improved.
As shown in fig. 2, the pedestrian protection method is based on the pedestrian protection system, and the method comprises the following steps: the sensing unit 1 monitors whether a pedestrian exists within a preset distance of 150m, if not, the monitoring is continuously kept, and if so, the motion trail information of the pedestrian, namely the speed of the pedestrian, the distance information between the pedestrian and the vehicle and the number information of the pedestrian are monitored in real time and output to the control unit.
The control unit receives the motion trail information of the pedestrian and the collision area of the weak road user, if the collision area of the pedestrian is predicted not to be at the front end of the vehicle, the collision area of the pedestrian is continuously predicted until the collision area of the pedestrian appears at the front end of the vehicle, and if the collision area of the pedestrian is predicted to be at the front end of the vehicle, the relative speed of the pedestrian and the vehicle is judged at the same time.
If the relative speed of the pedestrian and the vehicle is not more than a preset value, such as 35km/h, the relative speed of the pedestrian and the vehicle is continuously monitored until the relative speed of the pedestrian and the vehicle can be larger than the preset value, and if the relative speed of the pedestrian and the vehicle is larger than the preset value, the information of the number of the pedestrian is obtained.
And if the number of the pedestrians is two or more, igniting the left cavity 31, the middle cavity 32 and the right cavity 33 of the airbag 3 at the same time, if the number of the pedestrians is two or less, predicting the position of the pedestrian collision point in a specific area at the front end of the vehicle, and controlling the airbag 3 to explode the corresponding cavity in the specific area at the front end of the vehicle according to the predicted position of the pedestrian collision point.
If the position of the pedestrian collision point is predicted to be in the area on the left side of the front end of the vehicle, namely the area of the front end of the vehicle, which is-200 mm to-600 mm by taking the center of the vehicle as a reference standard, the left cavity 31 and the middle cavity 32 of the air bag 3 are controlled to explode.
If the position of the pedestrian collision point is predicted to be in the vehicle front end central area, namely the area of-200 to 200mm of the front end of the vehicle by taking the vehicle center as a reference standard, the cavity 32 in the air bag 3 is controlled to explode.
If the position of the pedestrian collision point is predicted to be in the area of 200-600 mm of the front end of the vehicle with the center of the vehicle as a reference in the area of the right side of the front end of the vehicle, the right cavity 33 and the middle cavity 32 of the airbag 3 are controlled to explode.
The control unit 2 sends an ignition instruction to control the corresponding cavity of the air bag 3 to explode 40-80ms before the collision.
The working principle of the existing safety airbag is that when an automobile collides, a collision sensor captures collision data and transmits the received data to a control unit 2, then the control unit 2 analyzes the data according to collision strength, if the collision data captured by the sensor reaches the condition of unfolding the airbag, the collision sensor sends an airbag releasing instruction to an inflation system, the inflation system is ignited, high-density solid substance sodium azide or ammonium nitrate reacts to generate a large amount of low-density nitrogen, and therefore the safety airbag is expanded and popped up at one moment, and buffering protection is provided for pedestrians.
The sensing module 1 detects whether a pedestrian exists in a preset distance, when the sensing module 1 monitors that the pedestrian exists in the preset distance, the pedestrian motion track and the number information of the pedestrian in the preset distance are output to the control unit 2 in real time, the control unit 2 predicts the collision area of the pedestrian and the vehicle after receiving the pedestrian motion track information, the control unit 2 acquires the number information of the pedestrian when the collision area of the pedestrian and the vehicle is at the front end of the vehicle, the control unit 2 controls all cavities of the air bags 3 to be simultaneously exploded when the number of the pedestrian is two or more, the control unit 2 predicts the positions of the collision points of the pedestrian and the vehicle at the front end of the vehicle when the number of the pedestrian is two or less, and the control unit 2 controls the air bags 3 to explode corresponding cavities according to the positions of the collision points of the pedestrian and the vehicle at the. According to the invention, when the number of pedestrians is less than two, the airbag 3 is controlled to explode a corresponding cavity at the front end of the vehicle according to the collision point of the pedestrians and the vehicle, so that the size of the airbag 3 for the vehicle can be expanded to just protect the pedestrians from being injured, the pedestrian over-protection of the airbag 3 for the vehicle is prevented, and the accuracy and the utilization rate of the airbag 3 for explosion are improved.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a pedestrian protection system, its characterized in that, include gasbag (3), be used for monitoring and real-time output to predetermine pedestrian movement track and the perception module (1) of the number information of people in the distance and be used for receiving pedestrian movement track and the control unit (2) of number information, gasbag (3) are connected with control unit (2) input, gasbag (3) are connected with control unit (2) output, control unit (2) still are used for predicting the pedestrian and the collision region of vehicle and the pedestrian's number information that acquires the pedestrian when the collision region of pedestrian and vehicle is in vehicle front end region according to pedestrian movement track information, control unit (2) still are used for controlling all cavitys of gasbag (3) and explode simultaneously when the pedestrian number is two and more, control unit (2) still are used for predicting the position of pedestrian and vehicle collision point when the number is two below the pedestrian and vehicle collision point and are in the vehicle And controlling the air bag (3) to explode the corresponding cavity according to the predicted position of the collision point after the vehicle front end specific area.
2. Pedestrian protection system according to claim 1, characterized in that the sensing module (1) comprises an environmental sensing unit (11) for monitoring whether there is a pedestrian within a preset distance and a lidar (12) for tracking the number of pedestrians and the movement trajectory of the pedestrians.
3. Pedestrian protection system according to claim 2, characterized in that the environment sensing unit (11) comprises a monocular camera (111) for daytime monitoring of the presence of pedestrians within a preset distance and an infrared camera (112) for nighttime monitoring of the presence of pedestrians within a preset distance.
4. A pedestrian protection method, characterized in that the method comprises the steps of:
monitoring whether a pedestrian exists in a preset distance, and monitoring the movement track of the pedestrian and the information of the number of the pedestrians in the preset distance in real time when the pedestrian exists in the preset distance and outputting the information to the control unit (2);
the control unit (2) predicts the collision area of the pedestrian and the vehicle according to the pedestrian motion track information, acquires the pedestrian number information when the collision area of the pedestrian and the vehicle is predicted to be in the front end area of the vehicle, controls all cavities of the air bag (3) to explode at the same time if the number of the pedestrian is two or more, predicts the position of the collision point of the pedestrian and the vehicle to be in the specific area of the front end of the vehicle if the number of the pedestrian is two or less, and controls the air bag (3) to explode the corresponding cavity according to the predicted position of the collision point.
5. The pedestrian protection method according to claim 4, wherein the collision region of the pedestrian with the vehicle is predicted to be at a front end of the vehicle and the relative speed of the pedestrian and the vehicle is also determined, and the pedestrian number information is acquired when the relative speed of the pedestrian and the vehicle is greater than a preset speed.
6. A pedestrian protection method according to claim 4 or 5, characterized in that said controlling the airbag (3) to detonate the corresponding chamber comprises:
if the predicted collision point of the pedestrian and the vehicle is in the left area of the front end of the vehicle, controlling the left cavity (31) and the middle cavity (32) of the air bag (3) to explode;
if the predicted collision point of the pedestrian and the vehicle is in the central area of the front end of the vehicle, controlling the explosion of a cavity (32) in the air bag (3);
and if the predicted collision point of the pedestrian and the vehicle is in the right area of the front end of the vehicle, controlling the right cavity (33) and the middle cavity (32) of the air bag (3) to explode.
7. The pedestrian protection method according to claim 6, wherein the vehicle front end left side region is included in a vehicle front end-200 to-600 mm region with reference to a vehicle center, the vehicle front end center region is included in a vehicle front end-200 to 200mm region with reference to a vehicle center, and the vehicle front end right side region is included in a vehicle front end 200 to 600mm region with reference to a vehicle center.
8. The pedestrian protection method of claim 5, wherein if the relative speed of the pedestrian and the vehicle is not greater than the predetermined speed when determining the relative speed of the pedestrian and the vehicle, the relative speed of the pedestrian and the vehicle is kept monitored until the relative speed of the pedestrian and the vehicle is greater than the predetermined speed.
9. The pedestrian protection method according to claim 4, wherein if the predicted collision region of the pedestrian with the vehicle is not at the front end of the vehicle when the collision region of the pedestrian with the vehicle is predicted, the prediction of the collision region of the pedestrian with the vehicle is maintained until the collision region of the pedestrian with the vehicle is at the front end of the vehicle.
10. The pedestrian protection method of claim 4, wherein the step of monitoring whether there is a pedestrian within the predetermined distance keeps monitoring the area within the predetermined distance until there is a pedestrian if there is no pedestrian within the predetermined distance.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548007A (en) * | 2021-07-08 | 2021-10-26 | 的卢技术有限公司 | Method for protecting pedestrians for motor vehicle |
| CN114954336A (en) * | 2022-06-07 | 2022-08-30 | 中国第一汽车股份有限公司 | Vehicle side anti-rolling processing method and device and vehicle |
| CN116714544A (en) * | 2023-06-08 | 2023-09-08 | 中国汽车工程研究院股份有限公司 | Pedestrian protection control system, method and storage medium based on prediction model |
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