CN111572491A - Active hood system based on scene control - Google Patents
Active hood system based on scene control Download PDFInfo
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- CN111572491A CN111572491A CN202010368040.7A CN202010368040A CN111572491A CN 111572491 A CN111572491 A CN 111572491A CN 202010368040 A CN202010368040 A CN 202010368040A CN 111572491 A CN111572491 A CN 111572491A
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- Prior art keywords
- hood
- pedestrian
- vehicle
- system based
- scene control
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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
- B60R21/38—Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets
-
- 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
- B60R21/013—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 collisions, impending collisions or roll-over
- B60R21/0134—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 collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Superstructure Of Vehicle (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses an active hood system based on scene control, which comprises an advanced auxiliary driving system, an automatic braking auxiliary system, a front vehicle anti-collision early warning system, a vehicle ECU (electronic control unit) and a hood motor, wherein when the vehicle ECU judges that a pedestrian can be impacted during driving according to signals collected by the advanced auxiliary driving system and signals of the automatic braking auxiliary system, the hood motor works to actively bounce a hood before the pedestrian is impacted. The invention can bounce the car cover in advance according to the specific condition that the pedestrian is collided and effectively protect the pedestrian.
Description
Technical Field
The invention provides a brand-new active hood system based on scene control, and aims to solve the problem that when a pedestrian is impacted in a vehicle driving road, whether the pedestrian is impacted is judged based on a driving scene, and a hood is actively bounced, so that the damage caused when the pedestrian is in contact with the vehicle is reduced.
Technical Field
No relevant products appear in the current market vehicle, but the product demand does exist.
The existing active hood judges whether the engine is impacted or not based on a collision sensor at the front end of the vehicle, outputs a signal to an ECU original piece, and detonates and bounces the hood under the algorithm control of the ECU. The response is delayed and costly.
The invention aims to provide an active hood system based on scene control, which is used for evaluating whether collision possibility exists or not by combining with a real scene acquired by an ADAS radar camera, so that whether a hood is bounced or not is judged, prejudgment is carried out in advance, the misjudgment probability is reduced, and the pedestrian protection is stronger. Meanwhile, the motor or pure mechanical control is adopted, so that the device can be repeatedly used, and the cost is reduced.
Disclosure of Invention
In order to solve the technical problem, the invention discloses an active hood system based on scene control, which can bounce a vehicle hood in advance according to the specific condition that a pedestrian is collided and effectively protect the pedestrian.
The invention discloses an active hood system based on scene control, which comprises an advanced auxiliary driving system, an automatic braking auxiliary system, a front vehicle anti-collision early warning system, a vehicle ECU (electronic control unit) and a hood motor, wherein when the vehicle ECU judges that a pedestrian can be impacted during driving according to signals collected by the advanced auxiliary driving system and signals of the automatic braking auxiliary system, the hood motor works to actively bounce a hood before the pedestrian is impacted.
In a preferred embodiment of the present invention, the specific steps comprise,
in a preferred embodiment of the invention, the collision sensor of the preceding vehicle anti-collision early warning system records an acceleration signal during the collision and evaluates the severity of the collision.
In a preferred embodiment of the present invention, the hood motor is connected to the hood by a hood hinge.
In a preferred embodiment of the invention, the millimeter wave radar is used for acquiring the distance between vehicles in front and the speed of the vehicles.
In a preferred embodiment of the invention, the angle radar is used to detect the distance to the rear and the speed of the vehicle.
In a preferred embodiment of the present invention, the signals collected by the advanced driver assistance system through a radar and a camera include: the motion pattern of the pedestrian, the motion time of the pedestrian, the motion speed of the pedestrian, and the initial speed at which the pedestrian is struck.
In a preferred embodiment of the invention, it specifically comprises,
in a preferred embodiment of the invention, the bounce height of the hood is estimated according to the position of the pedestrian impacted, and is estimated and calibrated according to CAE simulation.
In a preferred embodiment of the present invention, the hood bounce height H is calculated as: h ═ V1*t，
Wherein, V1For hood bounce speed, S is vehicle distance, a is deceleration of brake response, v0To identify the vehicle speed of a pedestrian ahead.
The invention has the following effective effects: the radar and camera original piece of the ADAS driving auxiliary system is combined with the AEB and FCW functions, and hardware such as the vehicle ECU, the hood motor and the hood hinge are jointly built to form a system, so that a brand new system capable of effectively protecting the scene of the pedestrian is formed, the hood can be bounced in advance before the pedestrian is collided, and the injury caused by the collision of the pedestrian is effectively reduced.
Drawings
FIG. 1 is a diagram of the corresponding hardware location of the present invention
FIG. 2 is a schematic diagram of the algorithm strategy of the present invention
In the figure: 1-ADAS radar, 2-ADAS camera, 3-mechanical motor, 4-vehicle ECU.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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.
The invention discloses an active hood system based on scene control, which comprises an advanced auxiliary driving system, an automatic braking auxiliary system, a front vehicle anti-collision early warning system, a vehicle ECU (electronic control unit) and a hood motor, wherein when the vehicle ECU judges that a pedestrian can be impacted during driving according to signals collected by the advanced auxiliary driving system and signals of the automatic braking auxiliary system, the hood motor works to actively bounce a hood before the pedestrian is impacted. The specific steps comprise that,
preferably, the collision sensor of the front vehicle anti-collision early warning system records an acceleration signal during collision and evaluates the severity of the collision.
Preferably, the hood motor is connected to the hood by a hood hinge.
Preferably, the millimeter wave radar is used for acquiring the front distance and the speed of the vehicle.
Preferably, the angle radar is used for acquiring the rear distance and the speed of the vehicle.
Preferably, the signals collected by the advanced driver assistance system through a radar and a camera comprise: the motion pattern of the pedestrian, the motion time of the pedestrian, the motion speed of the pedestrian, and the initial speed at which the pedestrian is struck.
In a preferred embodiment of the invention, it specifically comprises,
in a preferred embodiment of the invention, the bounce height of the hood is estimated according to the position of the pedestrian impacted, and is estimated and calibrated according to CAE simulation.
The invention aims to combine radar and camera elements of an ADAS driving auxiliary system, and combine AEB and FCW functions, vehicle ECU (electronic control unit), a hood motor, a hood hinge and other hardware to jointly establish a system, and belongs to a brand-new system aiming at a pedestrian protection scene.
In a particular scenario:
1. when the vehicle runs at a certain speed, a signal is fed back to the controller ECU aiming at a pedestrian recognition scene appearing ahead.
2. The controller performs calculation by combining the AEB and FCW performances to evaluate whether the pedestrian is impacted after the triggering of the AEB function. If the collision is about to occur, a motor in the front engine room is triggered to drive the hood hinge to bounce. If the AEB can brake to avoid collision, the algorithm is closed, and the motor actuator does not respond. The specific algorithm strategy is set based on fig. 2.
3. The front-end collision sensor is only used as an auxiliary signal, records an acceleration signal during collision, and evaluates the severity of the collision.
After the hood is bounced, the driver can control the hood to close again by himself.
The hood pop-up control logic is as follows:
according to the above test summary, the hood bounce height H is calculated by the formula: h ═ V1*t，
Wherein, V1For hood bounce speed, S is vehicle distance, a is deceleration of brake response, v0To identify the vehicle speed of a pedestrian ahead.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (10)
1. The utility model provides an initiative aircraft bonnet system based on scene control, includes senior driver assistance system, automatic braking auxiliary system, preceding car anticollision early warning system, vehicle ECU and aircraft bonnet motor, its characterized in that: when the vehicle ECU judges that the vehicle can impact pedestrians during running according to the signals collected by the advanced auxiliary driving system and the signals of the automatic braking auxiliary system, the hood motor works to actively bounce the hood before the pedestrians are impacted.
2. The active hood system based on scene control of claim 1, wherein: the specific steps comprise that,
step 1, when a vehicle runs at a certain speed, an advanced assistant driving system feeds back signals to a controller ECU (electronic control Unit) aiming at a pedestrian recognition scene appearing ahead;
and 2, calculating by combining the vehicle ECU with an automatic braking auxiliary system, evaluating whether the pedestrian is impacted after the automatic braking auxiliary system is triggered, if the pedestrian is judged to be impacted, triggering a motor in a front engine room to drive a hood hinge to bounce, and if the AEB can brake to avoid the impact, closing the algorithm and not responding by a motor actuator.
3. The active hood system based on scene control of claim 1, wherein: and a collision sensor of the front vehicle anti-collision early warning system records an acceleration signal during collision and evaluates the severity of the collision.
4. The active hood system based on scene control of claim 1, wherein: the hood motor is connected with the hood through a hood hinge.
5. The active hood system based on scene control of claim 1, wherein: the millimeter wave radar is used for acquiring the front distance and the speed of the vehicle.
6. The active hood system based on scene control of claim 1, wherein: the angle radar is used for acquiring the rear distance and the speed of the vehicle.
7. The active hood system based on scene control of claim 1, wherein: the advanced assistant driving system comprises the following signals acquired by a radar and a camera: the motion pattern of the pedestrian, the motion time of the pedestrian, the motion speed of the pedestrian, and the initial speed at which the pedestrian is struck.
8. The active hood system based on scene control of claim 7, wherein: the concrete steps include that,
9. the active hood system based on scene control of claim 1, wherein: the bounce height of the hood is estimated according to the position of the pedestrian impacted, and is estimated and set according to the CAE simulation and the calibration working condition.
10. The active hood system based on scene control of claim 9, wherein: the calculation formula of the bounce height H of the hood is as follows:
H＝V1*t
wherein, V1In order to increase the speed of the hood in the bouncing direction,
s is the distance between the passenger car and the vehicle,
a is the deceleration of the braking response,
v0to identify the vehicle speed of a pedestrian ahead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368040.7A CN111572491A (en) | 2020-05-01 | 2020-05-01 | Active hood system based on scene control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010368040.7A CN111572491A (en) | 2020-05-01 | 2020-05-01 | Active hood system based on scene control |
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| CN202010368040.7A Pending CN111572491A (en) | 2020-05-01 | 2020-05-01 | Active hood system based on scene control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889545A (en) * | 2022-05-24 | 2022-08-12 | 中国第一汽车股份有限公司 | Active type hood issuing system, method and equipment based on binocular camera recognition and storage medium |
| 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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| CN111003068A (en) * | 2018-10-05 | 2020-04-14 | 现代自动车株式会社 | Continuously operating active hood device connected with ADAS |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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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Application publication date: 20200825 |