CN110077356A

CN110077356A - A kind of method, apparatus that actively protecting pedestrian, system, memory and terminal

Info

Publication number: CN110077356A
Application number: CN201910364137.8A
Authority: CN
Inventors: 赵凯龙; 习波波; 李月明
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2019-08-02
Anticipated expiration: 2039-04-30
Also published as: CN110077356B

Abstract

The invention discloses a kind of method for actively protecting pedestrian, the method is for controlling igniter detonation, and the igniter is for bouncing hood；The described method includes: obtaining the collected forward image of camera；Obtain the collision distance of radar collected barrier and vehicle；Judge with the presence or absence of pedestrian in the forward image, and judges whether the collision distance is less than first threshold；If there are pedestrians in the forward image, and the collision distance is less than the first threshold, then pre- fuze is sent to the igniter, so that the igniter carries out detonation preparation.Using the present invention, has and recognize the need for detonate, avoid unnecessary waste；And quickly detonate, thus the advantages of preferably protecting pedestrian.

Description

Method, device and system for actively protecting pedestrian, memory and terminal

Technical Field

The invention relates to the field of automobile driving, in particular to a method, a device, a system and a memory for actively protecting pedestrians.

Background

When a collision of the vehicle with a pedestrian occurs, the hood area of the vehicle is a main place causing head injury of the pedestrian. In the existing design, when collision occurs, the engine cover is bounced to form a surface which can be contacted with the head and an energy absorption space, so that the head is in an energy absorption state when being contacted with the surface of the engine cover, and the possibility of injury to the head of a pedestrian is further favorably reduced. However, the collision of the vehicle may be a collision with the vehicle, and may be other objects than human, such as trees, stones, and the like. In the above case, the engine cover does not need to be elastic. The bonnet is deformed once it is popped up, and needs to be replaced again, which is expensive to maintain.

In addition, in the conventional hood pop-up scheme, a belt-active pop-up device is provided at the rear end of the hood of the vehicle, and the pop-up device is controlled to blow up by some sensor built in the bumper. When the vehicle collides with the pedestrian, the pedestrian contacts with a certain part of the front bumper of the vehicle, and the sensor receives the contact signal and transmits the signal to the bouncing device to bounce the rear end of the engine cover. However, the mechanical device has a certain hysteresis in the process from the signal reception to the bounce, which also results in the bonnet not being bounced in time or a long bounce time.

Therefore, there is a need to improve upon the above-mentioned technical problems.

Disclosure of Invention

In order to solve the technical problem, the invention discloses a method for actively protecting pedestrians, which is used for controlling an ignition device to detonate, wherein the ignition device is used for bouncing an engine cover; the method comprises the following steps:

acquiring a front image acquired by a camera;

acquiring the collision distance between an obstacle and a vehicle, which is acquired by a radar;

judging whether a pedestrian exists in the front image or not and judging whether the collision distance is smaller than a first threshold value or not;

if the pedestrian exists in the front image and the collision distance is smaller than the first threshold value, a pre-detonation instruction is sent to the ignition device so that the ignition device can be prepared for detonation.

Further, the method further comprises:

acquiring collision pressure acquired by a pressure sensor;

judging whether the collision pressure is greater than a second threshold value;

and if the collision pressure is greater than the second threshold value, controlling the ignition device to detonate so as to drive the engine cover to bounce and protect pedestrians.

Further, the method further comprises:

if the collision pressure is not greater than the second threshold, the ignition device is not detonated.

Further, the method further comprises:

and if no pedestrian exists in the front image, the ignition device is not detonated.

Further, the camera is arranged in an air inlet grille of a front bumper of the vehicle.

Further, the radar is arranged on the outer surface of a front bumper of the vehicle;

the pressure sensor is provided to an inner surface of the front bumper.

Correspondingly, the invention also provides a device for actively protecting pedestrians, which is used for controlling the ignition device to detonate and bouncing the engine cover; the active pedestrian protection device includes:

the front image acquisition module is used for acquiring a front image acquired by the camera;

the radar information acquisition module is used for acquiring the collision distance between the obstacle and the vehicle acquired by the radar;

the first judgment module is used for judging whether a pedestrian exists in the front image and judging whether the collision distance is smaller than a first threshold value;

and the pre-detonation control module is used for sending a pre-detonation instruction to the ignition device to enable the ignition device to prepare for ignition if a pedestrian exists in the front image and the collision distance is smaller than the first threshold value.

Further, the active pedestrian protection device further includes:

the pressure acquisition module is used for acquiring collision pressure acquired by the pressure sensor;

the second judgment module is used for judging whether the collision pressure is greater than a second threshold value;

and the detonation control module is used for controlling the ignition device to detonate if the collision pressure is greater than the second threshold value so as to drive the engine cover to bounce and protect pedestrians.

Correspondingly, the invention also provides a system for actively protecting pedestrians, which comprises the device for actively protecting pedestrians.

Further, the system also comprises a camera, a radar, a pressure sensor, an ignition device and an engine cover;

the camera is arranged in an air inlet grille of a front bumper of a vehicle, the radar is arranged on the outer surface of the front bumper, the pressure sensor is arranged on the inner surface of the front bumper, and the ignition device is arranged below the engine cover;

the active pedestrian protection device is respectively connected with the camera, the radar, the pressure sensor and the ignition device.

Accordingly, the present invention also provides a computer readable memory having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which is loaded and executed by a processor to implement any of the above methods for actively protecting pedestrians.

Correspondingly, the invention also provides a terminal, which comprises: a processor and a memory; wherein,

the processor is used for calling and executing the program stored in the memory;

the memory is for storing a program for: acquiring a front image acquired by a camera; acquiring the collision distance between an obstacle and a vehicle, which is acquired by a radar; judging whether a pedestrian exists in the front image or not and judging whether the collision distance is smaller than a first threshold value or not; if the pedestrian exists in the front image and the collision distance is smaller than the first threshold value, a pre-detonation instruction is sent to the ignition device so that the ignition device can be prepared for detonation.

By adopting the technical scheme, the invention has the following beneficial effects: whether the collision is a pedestrian can be judged through the camera, so that unnecessary waste is avoided; whether a pre-detonation command is sent to the ignition device or not is pre-judged for possible collision conditions, so that the engine cover is more elastic, and pedestrians are better protected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a diagram of an application scenario of the method for actively protecting pedestrians according to the present invention;

FIG. 2 is a schematic view of the ignition device of the present invention shown ejecting the engine cover;

FIG. 3 is a schematic flow chart of the method for actively protecting pedestrians according to the present invention;

FIG. 4 is a schematic flow chart of the method for actively protecting pedestrians according to the present invention;

FIG. 5 is a schematic diagram of the pedestrian protection apparatus according to the present invention;

FIG. 6 is a schematic diagram of the pedestrian protection apparatus according to the present invention;

FIG. 7 is a schematic diagram of the system for pedestrian active protection according to the present invention;

FIG. 8 is a schematic diagram of the system for pedestrian active protection according to the present invention;

fig. 9 is a schematic view of the position of the elastic device according to the present invention.

The following is a supplementary description of the drawings:

1-an engine cover; 2-an ignition device; 3-a hinge; 4-an active pedestrian protection device; 401-front image acquisition module; 402-a radar information acquisition module; 403-a first judging module; 404-pre-detonation control module; 405-a pressure acquisition module; 406-a second determination module; 407-detonation control module; 5-a camera; 6-radar; 7-a pressure sensor; 8-elastic means.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like 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.

Example (b):

referring to fig. 1 and 2, fig. 1 is a view of an application scenario provided by an embodiment of the present invention, in which an ignition device 2 is disposed between an engine cover 1 and an engine compartment of a vehicle. As shown in fig. 2, in order to protect the pedestrian from the head injury impact when the pedestrian is accidentally bumped, the ignition device will ignite and explode, and the hinge 3 deforms accordingly, so that the engine cover bounces upwards for a certain distance, and a certain space is reserved between the engine cover and the hard engine to slow down the head impact of the engine on the pedestrian.

The following describes a method for actively protecting pedestrians according to the application scenario, and fig. 3 is a flowchart of a method for actively protecting pedestrians according to an embodiment of the present invention, where the method operation steps described in the embodiment or the flowchart are provided in this specification, but more or less operation steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. In practice, the system or server product may be implemented in a sequential or parallel manner (e.g., parallel processor or multi-threaded environment) according to the embodiments or methods shown in the figures. Specifically, as shown in fig. 3, the method may include:

s100: and acquiring a front image acquired by the camera.

In some embodiments, as shown in fig. 8, the camera is disposed in the intake grill of the front bumper of the vehicle.

It can be understood that if the camera is installed at a higher place, such as a car roof, a blind area of front image acquisition is easily caused; especially for children with short height, the acquisition is easy to fail, and misjudgment is caused. And set up the camera in the vehicle front bumper, then can reach the detection of 360 no dead angles and carry out pedestrian's discernment, and detection information is more reliable.

S200: and acquiring the collision distance between the obstacle acquired by the radar and the vehicle.

In some embodiments, as shown in FIG. 7, the radar is disposed on an outer surface of a front bumper of the vehicle.

The radar can acquire information of all obstacles in a front detection range and acquire collision distance information between the vehicle and any obstacle.

S300: and judging whether the front image has the pedestrian or not and judging whether the collision distance is smaller than a first threshold value or not.

Further, whether a pedestrian exists in the front image or not can be judged through an image recognition technology; whether the collision distance is smaller than a first threshold value means whether the distances between all obstacles in the detection range of the radar and the vehicle are smaller than the first threshold value.

Further, the radar includes, but is not limited to, laser radar, millimeter wave radar, and ultrasonic radar.

S400: if the pedestrian exists in the front image and the collision distance is smaller than the first threshold value, a pre-detonation instruction is sent to the ignition device so that the ignition device can be prepared for detonation.

In some embodiments, the ignition device may be a jack, and the priming preparation of the jack may be to charge the jack with a quantity of gas to shorten the path of detonation. Therefore, if the real collision happens, the lifter can be detonated more quickly, and the engine cover can be ejected more quickly.

In some embodiments, as shown in fig. 4, the method for actively protecting pedestrians further includes:

s500: and acquiring the collision pressure acquired by the pressure sensor.

In some embodiments, as shown, the pressure sensor is disposed on an inner surface of the front bumper. When the vehicle collides with a pedestrian, the pressure sensor can directly acquire the magnitude of the collision pressure so as to prevent the collision pressure from having an error.

S600: and judging whether the collision pressure is larger than a second threshold value.

It will be appreciated that the first threshold value should be a threshold value which ensures that the pedestrian is not in danger of a human being in the event of such an impact.

S700: and if the collision pressure is greater than the second threshold value, controlling the ignition device to detonate so as to drive the engine cover to bounce and protect pedestrians.

In some embodiments, the method of actively protecting pedestrians further comprises:

It will be appreciated that the determining factor governing the initiation of the ignition device is the magnitude of the crash pressure, which is greater than a second threshold value, at which the ignition device will initiate.

Further, if the ignition device has already sent a pre-firing command in steps S100 to S400, but has not received the detection signal of the pressure sensor within the collision distance of the first threshold, the pre-firing command may be cancelled. Or further identifying whether a pedestrian exists in the front or not through the camera, and if no pedestrian exists, removing the pre-detonation instruction.

Further, if the ignition device is the lifter, the gas filled in the lifter due to the pre-detonation instruction can be reduced, so that the lifter is restored to the initial state.

That is to say, when the camera confirms that the barrier in front is the pedestrian, and the collision pressure reaches the second threshold value, the ignition device can really ignite and detonate, drive the bonnet jack-up. Avoiding unnecessary waste caused by jacking the engine cover due to other obstacles. In the process, when the radar detects that the distance between the front obstacle and the vehicle is smaller than a first threshold value and the camera detects that a pedestrian exists in front, a pre-detonation instruction is sent to the ignition device to enable the ignition device to enter ignition detonation preparation, so that the time when ignition detonation is really needed is reduced, detonation is quicker, and the pedestrian is protected.

In some embodiments, the method of actively protecting pedestrians further comprises: and sending corresponding alarm information to the driver according to the size of the collision distance.

Specifically, the sending of the corresponding alarm information to the driver according to the size of the collision distance includes:

if the collision distance is smaller than a third threshold value, first alarm information is sent to a user, and the first alarm information can be 'a pedestrian protection system is about to be started';

if the collision distance is smaller than a fourth threshold value, second alarm information is sent to the user, and the second alarm information can be that 'an obstacle exists in front and a collision risk exists' and an indicator light flickers;

if the collision distance is smaller than a fifth threshold value, third alarm information is sent to a user, and the third alarm information can be 'driving with caution if an obstacle exists in front';

wherein the fifth threshold is greater than a fourth threshold, which is greater than a third threshold.

The present invention also provides a computer memory having stored therein at least one instruction, at least one program, set of codes, or set of instructions that is loaded by a processor and that performs a method of actively protecting pedestrians as described above.

The present invention also provides a computer readable memory having stored therein at least one instruction, at least one program, code set or set of instructions, which is loaded and executed by a processor to implement any one of the methods of actively protecting pedestrians provided by the above method embodiments.

The present invention also provides a terminal, including: a processor and a memory; wherein,

the memory is used for storing a program for implementing any one of the methods for actively protecting pedestrians provided by the above method embodiments.

As shown in fig. 5, the embodiment of the present invention further provides an active pedestrian protection device, wherein the active pedestrian protection device 4 is used for controlling the ignition device 2 to detonate, and the ignition device 2 is used for popping up the engine cover 1; the active pedestrian protection device 4 includes:

a front image obtaining module 401, configured to obtain a front image collected by a camera;

a radar information obtaining module 402, configured to obtain a collision distance between an obstacle and a vehicle, where the obstacle is acquired by a radar;

a first judging module 403, configured to judge whether there is a pedestrian in the front image, and judge whether the collision distance is smaller than a first threshold;

and a pre-detonation control module 404, configured to send a pre-detonation instruction to the ignition device to prepare for ignition if a pedestrian exists in the front image and the collision distance is smaller than the first threshold.

In some embodiments, as shown in fig. 6, the active pedestrian protection device 4 further includes:

a pressure obtaining module 405, configured to obtain collision pressure acquired by a pressure sensor;

a second determination module 406, configured to determine whether the collision pressure is greater than a second threshold;

and the detonation control module 407 is configured to control the ignition device to detonate to drive the engine cover to bounce to protect a pedestrian if the collision pressure is greater than the second threshold value.

In some embodiments, the active pedestrian protection device may be integrated within an airbag device.

The embodiment of the invention also provides a system for actively protecting pedestrians, which comprises any one of the devices 4 for actively protecting pedestrians.

In some embodiments, as shown in fig. 7 and 8, the system further comprises a camera 5, a radar 6, a pressure sensor 7, an ignition device 2 and an engine cover 1;

the camera 5 is arranged in an air inlet grille of a front bumper of a vehicle, the radar 6 is arranged on the outer surface of the front bumper, the pressure sensor is arranged on the inner surface of the front bumper, and the ignition device 2 is arranged below the engine cover 1;

the active pedestrian protection device 4 is respectively connected with the camera 5, the radar 6, the pressure sensor 7 and the ignition device 2.

Further, as shown in fig. 7, there are two radars, and the two radars are disposed on the outer surface of the front bumper and are respectively disposed on two sides of the camera.

Further, as shown in fig. 7, the ignition device has two ignition devices, and the two ignition devices are symmetrically arranged on one side of the engine cover close to the windshield.

Further, as shown in fig. 7, the system further includes a hinge disposed between the bonnet and the nacelle.

Further, the hinge has two, two the hinge symmetry set up in the bonnet is close to one side of windshield, and is close to ignition.

If the ignition device is a jacking device, an exhaust hole is arranged on the jacking device. After the piston is popped and jacked, the piston is pushed out by increasing the pressure of the internal gas, so that the engine cover is jacked, and after jacking, the internal gas is discharged through the exhaust hole, and the piston is reset along with the internal gas. In the process, the hinge deforms, and after the lifter resets, the engine cover is continuously supported through the hinge.

In some embodiments, as shown in fig. 9, the system further comprises elastic means 8, said elastic means 8 being arranged between the bonnet 1 and the nacelle.

Further, the elastic device 8 may be a spring, which is disposed between the engine cover 1 and the engine compartment, and can play a certain role in buffering when a pedestrian collides with the engine cover, so as to improve the protection degree of the system for the pedestrian.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method for active pedestrian protection, characterized in that the method is used for controlling the detonation of an ignition device for bouncing the bonnet; the method comprises the following steps:

acquiring a front image acquired by a camera;

2. The method of actively protecting pedestrians according to claim 1, further comprising:

acquiring collision pressure acquired by a pressure sensor;

3. The method of actively protecting pedestrians according to claim 1, further comprising:

and sending corresponding alarm information to the driver according to the collision distance.

4. The active pedestrian protection method of claim 1,

and arranging the camera in an air inlet grid of a front bumper of the vehicle.

5. The active pedestrian protection method of claim 2,

disposing the radar on an outer surface of a front bumper of a vehicle;

the pressure sensor is provided to an inner surface of the front bumper.

6. An active pedestrian protection device, characterized in that the active pedestrian protection device is used for controlling the ignition device to detonate, and the ignition device is used for bouncing the engine cover; the active pedestrian protection device includes:

7. The active pedestrian protection device of claim 6 further comprising:

8. An active pedestrian protection system, characterized in that it comprises an active pedestrian protection arrangement according to any one of claims 6 or 7;

the system also comprises a camera, a radar, a pressure sensor, an ignition device and an engine cover;

9. A computer readable memory having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, which is loaded and executed by a processor to implement the method of actively protecting pedestrians as claimed in any one of claims 1 to 5.

10. A terminal, comprising: a processor and a memory; wherein,