CN114043908B - Protection system and protection method for dealing with automobile rear-end collision - Google Patents

Protection system and protection method for dealing with automobile rear-end collision Download PDF

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Publication number
CN114043908B
CN114043908B CN202111540016.8A CN202111540016A CN114043908B CN 114043908 B CN114043908 B CN 114043908B CN 202111540016 A CN202111540016 A CN 202111540016A CN 114043908 B CN114043908 B CN 114043908B
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automobile
seat
end collision
acceleration
control
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CN114043908A (en
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王恒
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42736—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the whole seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/02246—Electric motors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/0276—Non-manual adjustments, e.g. with electrical operation with logic circuits reaction to emergency situations, e.g. crash
    • 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
    • B60R21/0132—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 vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01538—Passenger detection systems using field detection presence sensors for image processing, e.g. cameras or sensor arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
    • 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
    • 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
    • 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
    • B60R2021/01252—Devices other than bags
    • B60R2021/01265—Seat belts
    • B60R2021/01272—Belt tensioners
    • 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
    • B60R2021/01286—Electronic control units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
    • B60R2022/1957—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type characterised by electric actuators
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Seats For Vehicles (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)

Abstract

The application discloses a protection system and a protection method for dealing with automobile rear-end collision, which relate to the technical field of automobile safety protection and comprise that a radar camera module collects the information of obstacles behind an automobile; the method comprises the steps that an acceleration sensor module collects first acceleration information of an automobile; the user information acquisition module acquires the upper mass and the upper centroid distance; before the rear-end collision occurs, the control module processes the information according to the barrier to obtain a first control instruction so as to control the danger avoiding operation of the automobile; when a rear-end collision occurs, second acceleration information of the driver and the passenger is obtained through processing according to the first acceleration information, impact torque of the driver and the passenger relative to the backrest and a corresponding second control command are obtained through processing according to the upper mass, the second acceleration information and the upper mass center distance so as to control the back rotation operation of the electric seat, and the motor torque is not smaller than the impact torque during the back rotation operation. The automobile rear-end collision protection device can improve the protection level of drivers and passengers in automobile rear-end collision, and improves driving safety.

Description

Protection system and protection method for dealing with automobile rear-end collision
Technical Field
The application relates to the technical field of automobile safety protection, in particular to a protection system and a protection method for dealing with automobile rear-end collision.
Background
As the automobile safety evaluation standards, there are C-NCAP, E-NCAP, J-NCAP, IIHS and the like. Wherein C-NCAP is named China New Car Association Program, china New Car evaluation procedure; the E-NCAP is called European New Car Association, european Union New Car safety evaluation Association, and is also one of the most authoritative safety certification organizations in the automobile world; IIHS, the national Institute for Highway Safety, is one of the most authoritative Safety certification authorities in the automotive field, and has the most stringent collision test standard; J-NCAP, commonly known as Japan New Car Association Program, is a Japanese New Car evaluation protocol. The E-NCAP has been the benchmark of the industry. The requirements of the E-NCAP are higher and stricter, and the C-NCAP and the J-NCAP are improved by taking the E-NCAP as a wind vane. In the automobile collision, evaluation mechanisms such as C-NCAP, E-NCAP, J-NCAP, IIHS and the like can evaluate the damage to the human body based on different types of collision working conditions.
In the actual use of an automobile, rear-end collision belongs to a very typical road traffic accident, in the rear-end collision accident, the movement of a passenger of a collided vehicle is in a backward relative movement form, the head and the neck are main damage parts, and the whole damage mechanism is caused by overlarge or too fast relative movement between the head and the upper trunk. Whiplash injury refers to a whiplash-like motion of the neck of a vehicle, which is collided by a driver or a passenger, under the combined action of collision acceleration and head inertia force during a rear-end collision. After an accident, the neck of the injured person feels discomfort to a different extent, and the injury is not fatal, but the process of rehabilitation after the injury is very complicated and long, and some permanent injuries are even incurable. In the existing security evaluation institutions at home and abroad, a whip test is generally adopted to evaluate the corresponding performance characterization.
In the existing coping method, the active headrest is mainly adopted, the gap between the head and the human body is reduced, and the like, and the backrest airbag is rarely adopted for optimization. For example, headrest device of initiative protection, the device include headrest, piston rod, controller, and the headrest includes headrest moving part that can remove, fixes the headrest fixed part on car seat, has the cylinder in the headrest fixed part, cylinder inner wall with piston rod's one end sliding connection, piston rod's the other end with headrest moving part is fixed, and the one end that headrest moving part was kept away from to the cylinder is connected with inflation equipment, and the lateral wall of cylinder still is connected with the disappointing pipe, the below of headrest fixed part is equipped with passenger's head displacement sensor, and the one end that headrest fixed part was kept away from to headrest moving part is equipped with pressure sensor, and cylinder inner wall is equipped with cylinder displacement sensor. The scheme is only based on headrest protection aiming at rear-end collision, and the whole protection under the whole rear-end collision working condition cannot be realized.
Among the existing coping approaches, there is also a rear collision avoidance and mitigation system that uses data collected from host vehicle sensors to generate a virtual map of objects approaching the host vehicle at least on the front and rear sides, with an on-board computer determining traffic conditions in front of and behind the host vehicle. Determining from the virtual map that a frontal collision and a rear collision will occur, and deciding one or more damage mitigation measures based on the determination that the frontal collision and the rear collision will occur. In particular, the on-board computer determines a collision avoidance maneuver, the computer instructs the vehicle control unit to implement the collision avoidance maneuver, the computer may additionally or alternatively transmit the collision avoidance maneuver to the driver via the interface, and in the case of an unavoidable collision, the computer determines and initiates the damage mitigation measures. The scheme is a control system and a method for reducing collision damage by sensing collision state to control the movement of the whole vehicle and adjusting the posture, and the whole control strategy has huge cost and is very difficult to realize.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a protection system and a protection method for dealing with automobile rear-end collision, which adopt protection measures before and after the rear-end collision respectively, improve the protection level of drivers and passengers in the automobile rear-end collision and improve the driving safety.
In order to achieve the above purposes, the technical scheme is as follows:
the present application provides in a first aspect a protection system for coping with a rear-end collision of an automobile, comprising:
a power seat including a seat portion including a seat, a backrest, and a seat belt, and a seat control portion including a motor controlling the seat portion to rotate forward or backward;
the radar camera module is used for collecting obstacle information behind the automobile;
the acceleration sensor module is used for acquiring first acceleration information of the automobile;
a user information acquisition module for acquiring an upper mass and an upper centroid distance; the upper mass refers to the mass of the part of the body of the driver or passenger above the seat; the upper mass center distance refers to the distance between the mass center of the part of the body of the driver and the passenger above the seat and the center of the rotating shaft of the motor;
the control module is used for processing and obtaining a first control instruction according to the obstacle information before rear-end collision occurs so as to control the danger avoiding operation of the automobile; and the rear-end collision control system is also used for processing according to the first acceleration information to obtain second acceleration information of the driver and the passenger when a rear-end collision occurs, and processing according to the upper mass, the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passenger relative to the backrest and a corresponding second control instruction so as to control the rear-end operation of the electric seat, wherein the motor torque is not less than the impact torque during the rear-end operation.
In some embodiments, the seat control portion further comprises a pretensioner to control the tightness of the seat belt;
the second control instruction is also used for controlling the pretensioner to tighten the safety belt.
In some embodiments, the radar camera module comprises:
a radar module which collects a radar signal behind the vehicle using a radar installed at a rear portion of the vehicle;
and the camera module is used for collecting a rear image behind the automobile by utilizing a camera arranged at the tail part of the automobile.
In some embodiments, before rear-end collision occurs, the control module respectively performs image recognition on a plurality of rear images collected in a certain time period to judge whether short-distance car following exists in a preset distance behind the car, and performs comparison analysis on a plurality of radar signals collected in the certain time period to obtain a car following distance and a car following speed of the short-distance car following when the short-distance car following is judged to exist, and the control module calculates the rear-end collision time according to the car following distance and the car following speed;
when judging that the car following time is smaller than a preset threshold value, the control module sends a first control instruction to the electric seat to control a motor of the electric seat to tighten a safety belt.
In some embodiments, the acceleration sensor module comprises:
the tail acceleration sensor is arranged at the tail of the automobile and is used for acquiring tail acceleration of the tail of the automobile;
the middle acceleration sensor is arranged in the middle channel of the automobile and used for acquiring the middle acceleration of the middle channel of the automobile;
and the first acceleration calculating unit is used for calculating first acceleration information according to the tail acceleration of the vehicle and the first acceleration information.
In some embodiments, when a rear-end collision occurs, the control module processes the first acceleration information according to a preset acceleration coefficient to obtain second acceleration information.
In some embodiments, the user information obtaining module comprises:
the image collector is arranged in front of an electric seat in the automobile and is used for collecting body images of the body of a driver and a passenger above the seat; and/or
And the contact sensor is arranged inside the backrest and used for acquiring the contact position of the head of the driver and the backrest.
In some embodiments, the user information obtaining module comprises:
the weighing sensor is arranged below the seat and used for collecting the upper mass of the body of the part of the driver above the seat;
and the centroid distance calculation unit is used for carrying out image recognition on the body image to obtain the body height of the part of the body of the driver above the seat or obtaining the body height of the part of the body of the driver above the seat according to the contact position, and processing the body height according to a preset centroid coefficient to obtain the upper centroid distance.
In some embodiments, the control module calculates the impact torque by the following equation:
My＝m*Acc*S
wherein the content of the first and second substances,
my represents the impact moment;
m represents the upper mass;
acc represents second acceleration information;
s represents the upper centroid distance.
The second aspect of the present application provides a protection method for dealing with a rear-end collision of an automobile, including:
acquiring barrier information behind the automobile;
collecting first acceleration information of an automobile;
acquiring an upper mass and an upper centroid distance; the upper mass refers to the mass of the part of the body of the driver or passenger above the seat; the upper mass center distance refers to the distance between the mass center of the part of the body of the driver and the passenger above the seat and the center of the rotating shaft of the motor;
before rear-end collision occurs, a first control instruction is obtained according to obstacle information processing so as to control danger avoiding operation of the automobile;
when rear-end collision occurs, processing according to the first acceleration information to obtain second acceleration information of the driver and the passenger, processing according to the upper mass, the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passenger relative to the backrest and a corresponding second control instruction so as to control the backspin operation of the electric seat, wherein the motor torque is not less than the impact torque during the backspin operation;
the power seat includes a seat portion including a seat, a backrest, and a seat belt, and a seat control portion including a motor controlling the seat portion to rotate forward or backward.
The beneficial effect that technical scheme that this application provided brought includes:
aiming at a human body whiplash injury mechanism, a complete rear-end collision protection strategy is formulated, a car following condition behind a car is monitored before rear-end collision occurs so as to carry out danger avoiding operation in time, the electric seat backrest is rotated backwards according to the impact degree of a driver and passengers on the electric seat backrest when rear-end collision occurs, so that the head, the neck and the back of a human body are optimally protected, the safety cover can be tightened emergently when rear-end collision occurs, the protection of the driver and passengers is further enhanced, fine adjustment is carried out based on the existing mechanism, comprehensive safety performance protection can be realized, and low cost and high benefit are realized.
Drawings
Fig. 1 is a functional block diagram of a protection system for dealing with rear-end collision of an automobile according to an embodiment of the present invention.
Fig. 2 is a flowchart of a protection method for dealing with a rear-end collision of an automobile in an embodiment of the present invention.
Fig. 3 is a schematic view of an occupant and a safety seat in an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings and examples.
An Advanced Driver Assistance System (ADAS), which is an active safety technology that collects environmental data inside and outside a vehicle at the first time by using various sensors installed on the vehicle, and performs technical processes such as identification, detection, tracking and the like of static and dynamic objects, so that a Driver can perceive possible dangers at the fastest time to draw attention and improve safety. The ADAS uses sensors, such as cameras, radars, lasers, and ultrasonic waves, which detect light, heat, pressure, or other variables used to monitor the state of the vehicle, and are usually located in the front and rear bumpers, side-view mirrors, and the inside of the steering column or on the windshield of the vehicle. Early ADAS technologies were primarily based on passive warning, which alerts motorists to abnormal vehicle or road conditions when a potential hazard is detected in the vehicle. Proactive intervention is also common with the latest ADAS technologies.
Referring to fig. 1, the embodiment of the invention provides a protection system for rear-end collision of an automobile, which includes an electric seat 1, a radar camera module 3, an acceleration sensor module 4, a user information acquisition module 5, and a control module 2. The power seat 1 can rotate forward and backward and also can tighten and loosen the safety belt 113. The radar camera module 3 collects information of obstacles behind the automobile and is used for judging whether a short-distance following automobile exists behind the automobile, the distance between the short-distance following automobile and the speed between the short-distance following automobile and the automobile. The user information acquisition module 5 acquires the upper mass and the upper centroid distance. Before the rear-end collision happens, the control module 2 obtains a first control instruction according to the obstacle information processing to control the danger avoiding operation of the automobile, namely, the control module controls the automobile to carry out the danger avoiding operation when judging that the automobile is closely following and the automobile is close to the rear-end collision in a short time. When a rear-end collision occurs, the control module 2 processes the first acceleration information to obtain second acceleration information of the driver and the passenger, processes the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passenger relative to the backrest 112 and a corresponding second control instruction to control the back-rotation operation of the electric seat 1, wherein the torque of the motor 121 is not less than the impact torque during the back-rotation operation.
The protection system makes a complete rear-end collision protection strategy aiming at a human body whiplash injury mechanism, monitors the car following condition behind a car before the rear end collision occurs so as to timely carry out danger avoiding operation, and rotates the backrest 112 of the electric seat 1 backwards according to the impact degree of a driver and passengers on the backrest 112 of the electric seat 1 when the rear end collision occurs, so that the head, the neck and the back of the human body are optimally protected, the safety cover can be emergently tightened when the rear end collision occurs, the protection of the driver and passengers is further enhanced, fine adjustment is carried out based on the existing mechanism, comprehensive safety performance protection can be realized, and low cost and high benefit are realized.
Specifically, a protection system for coping with rear-end collision of an automobile includes:
the power seat 1 includes a seat portion 11 and a seat control portion 12, the seat portion 11 includes a seat 111, a backrest 112, and a seat belt 113, and the seat control portion 12 includes a motor 121 that controls the seat portion 11 to rotate forward and backward.
And a radar camera module 3 for collecting obstacle information behind the automobile.
The acceleration sensor module 4 is used for acquiring first acceleration information of the automobile.
A user information acquisition module 5 for acquiring the upper mass and the upper centroid distance; the upper mass refers to the mass of the portion of the body of the occupant above the seat 111. The upper center of mass distance is a distance between the center of mass of the body of the part of the occupant located above the seat 111 and the center of the rotation shaft of the motor 121.
And the control module 2 is used for obtaining a first control instruction according to the obstacle information processing before the rear-end collision occurs so as to control the danger avoiding operation of the automobile. And the rear-end collision control device is also used for processing the first acceleration information to obtain second acceleration information of the driver and the passenger, processing the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passenger relative to the backrest 112 and a corresponding second control command to control the rear-end operation of the electric seat 1, wherein the torque of the motor 121 is not less than the impact torque during the rear-end operation.
In the present embodiment, the power seat 1, the radar camera module 3, and the acceleration sensor module 4 are common components in an intelligent vehicle, and are common devices that are easy to configure for low-end vehicles without these modules, and can be finely adjusted based on existing mechanisms. The control module 2 is an existing module in the airbag ECU, and therefore, the protection system can achieve the protection effect by basically adopting an existing device.
The protection system makes a complete rear-end collision protection strategy aiming at a human body whiplash injury mechanism, monitors the car following condition behind a car before the rear end collision occurs so as to timely carry out danger avoiding operation, and rotates the backrest 112 of the electric seat 1 backwards according to the impact degree of a driver and passengers on the backrest 112 of the electric seat 1 when the rear end collision occurs, so that the head, the neck and the back of the human body are optimally protected, the safety cover can be emergently tightened when the rear end collision occurs, the protection of the driver and passengers is further enhanced, fine adjustment is carried out based on the existing mechanism, comprehensive safety performance protection can be realized, and low cost and high benefit are realized.
In a preferred embodiment, as shown in FIG. 3, the control module 2 calculates the impact torque by the following equation:
My＝m*Acc*S
where My denotes an impact moment, m denotes an upper mass, acc denotes second acceleration information, and S denotes an upper centroid distance.
In this embodiment, when a rear-end collision occurs, the impact force F = m × Acc of the part of the body of the driver above the seat 111 against the backrest 112 can be calculated through the upper mass and the second acceleration information, the impact force is multiplied by the upper centroid distance, and the impact moment of the part of the body of the driver above the seat 111 against the backrest 112 can be obtained, the torque of the motor 121 is not less than the impact moment when the electric seat 1 rotates backward, that is, the backward tilting angle of the electric seat 1 is adjusted according to the impact moment, so that the impact of the backrest 112 against the driver during the rear-end collision is removed, the seat 111 moves along with the back of the human body, and the head, the neck and the back of the human body are optimally protected. The protection system can be combined with drivers and passengers of different body types to form optimal protection, and meanwhile, the drivers and passengers can also adjust input parameters to adjust the protection strategy according to the self state, for example, the user weight is manually input in advance.
The upper mass can also be set to an adjustable mode, preset to adjust based on the user's own needs after the user purchases the vehicle.
In the preferred embodiment, the seat control portion 12 also includes a pretensioner 122 that controls the tightness of the seat belt 113.
The second control instruction is also used to control the pretensioner 122 to tighten the webbing 113.
In the present embodiment, when a rear-end collision occurs, the pretensioner 122 receives the second control command and then urgently tightens the seat belt 113, thereby preventing the body of the driver or passenger from being greatly swung.
In a preferred embodiment, the radar camera module 3 comprises:
and a radar module 31 for collecting a radar signal at the rear of the vehicle using a radar installed at the rear of the vehicle.
And a camera module 32 for collecting a rear image of the rear of the vehicle by using a camera installed at the rear of the vehicle.
In this embodiment, the setting positions and the setting numbers of the radar and the cameras can be adjusted according to actual needs. Adopt radar and camera to judge the closely following car condition at car rear simultaneously, can improve the judgement precision under bad weather, for example avoid under the heavy fog weather whether the image is difficult to discern closely following the car, then adopt the mode of radar detection to judge whether there is the heel vehicle.
In a preferred embodiment, before a rear-end collision occurs, the control module 2 performs image recognition on a plurality of rear images collected within a certain time period respectively to determine whether a short-distance car-following exists within a preset distance behind the car, and performs comparison analysis on a plurality of radar signals collected within the certain time period to obtain a car-following distance and a car-following speed of the short-distance car-following when the short-distance car-following is determined to exist, and the control module 2 calculates the rear-end collision time according to the car-following distance and the car-following speed.
When judging that the vehicle following time is less than the preset threshold value, the control module 2 sends a first control instruction to the electric seat 1 to control the motor 121 to tighten the safety belt 113.
In this embodiment, the preset threshold may be 4s, and if the car following time is less than 4s, the first control signal is sent out, and the motor 121 tightens the belt seat 111, so as to restrain the human body in advance and correct the sitting posture. And if the car-following time is not less than 4s, sending out first control information, and playing reminding voice by the multimedia in the car.
In a preferred embodiment, the acceleration sensor module 4 comprises:
and the tail acceleration sensor 41 is arranged at the tail of the automobile and is used for acquiring the tail acceleration of the tail of the automobile.
And the middle vehicle acceleration sensor 42 is arranged in the middle vehicle channel and is used for acquiring the middle vehicle acceleration of the middle vehicle channel.
And a first acceleration calculating unit 43, configured to calculate first acceleration information according to the vehicle tail acceleration and the first acceleration information.
In the present embodiment, the acceleration sensor module 4 is a sensor module under the airbag ECU, and it is well known to those skilled in the art that the vehicle acceleration as a whole is calculated by a mean value or weight method using the vehicle rear acceleration and the vehicle center acceleration.
In a preferred embodiment, when a rear-end collision occurs, the control module 2 processes the first acceleration information according to a preset acceleration coefficient to obtain second acceleration information.
In the present embodiment, an acceleration coefficient is set in advance, and when a rear-end collision occurs, the acceleration of the electric seat 1 or the occupant in the electric seat 1 can be obtained by multiplying the acceleration of the entire vehicle by the acceleration coefficient.
In a preferred embodiment, the user information obtaining module 5 includes:
and an image collector 52 arranged in front of the electric seat 1 in the automobile for collecting body images of the body of the part of the driver above the seat 111. And/or a contact sensor 53 disposed inside the backrest 112 for acquiring a contact position of the occupant's head with the backrest 112.
And a load cell 51 disposed below the seat 111 for collecting an upper mass of a part of a body of the occupant located above the seat 111.
And the centroid distance calculation unit 54 is configured to perform image recognition on the body image to obtain the body height of the part of the body of the occupant located above the seat 111 or obtain the body height of the part of the body of the occupant located above the seat 111 according to the contact position, and process the body height according to a preset centroid coefficient to obtain the upper centroid distance.
In the present embodiment, the control module 2 evaluates the weight parameter of the upper limbs of the passenger, i.e. the upper mass m, acquired by the weighing sensor 51, the acceleration of the upper limbs of the chest cannot be acquired in an accident, and the rear collision acceleration, i.e. the second acceleration information Acc, can be acquired to process the impact of the driver and the passenger on the backrest 112 during a rear-end collision. Several specific examples of the calculation of the impact force F are as follows:
the chest mass of 50% adult men is 17.19kg, the adult men is set to be more than 17kg, and the impact force F = m × Acc against the backrest 112 can be calculated by taking the chest center of gravity as a rotation boundary.
The breast mass of 5% adult women is 12kg, the mass range of the adult women is set to be 12-17 kg, and the impact force F = m × Acc to the backrest 112 can be calculated by taking the breast center of gravity as a rotation boundary.
The reference mass of the underage breast of 10 years old is 5kg, the underage mass range is set to be 5-12 kg, the gravity center point of the breast is used as a rotation boundary, and the impact force F = m × Acc to the backrest 112 can be calculated.
The impact force value F can be confirmed by combining the upper mass m and the second acceleration information Acc, and then the impact moment My = F × S is obtained through calculation, so that the rotation moment required by the electric seat 1 can be obtained, the electric seat 1 can move along with the back of the human body, and the head, the neck and the back of the human body are optimally protected.
Referring to fig. 3, an embodiment of the present invention further provides a protection method for dealing with a rear-end collision of an automobile, including:
s1, acquiring barrier information behind the automobile.
And S2, collecting first acceleration information of the automobile.
S3, acquiring an upper mass and an upper mass center distance; upper mass refers to the mass of the portion of the body of the occupant above the seat 111; the upper center of mass distance is a distance between the center of mass of the body of the part of the occupant located above the seat 111 and the center of the rotation shaft of the motor 121.
And S4, before rear-end collision occurs, processing according to the obstacle information to obtain a first control instruction so as to control the danger avoiding operation of the automobile.
And S5, when a rear-end collision occurs, processing according to the first acceleration information to obtain second acceleration information of the driver and the passenger, and processing according to the upper mass, the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passenger relative to the backrest 112 and a corresponding second control command so as to control the back-rotation operation of the electric seat 1, wherein the torque of the motor 121 is not less than the impact torque during the back-rotation operation.
Steps S1 to S3 may be performed simultaneously.
The power seat 1 includes a seat portion 11 and a seat control portion 12, the seat portion 11 includes a seat 111, a backrest 112, and a seat belt 113, and the seat control portion 12 includes a motor 121 that controls the seat portion 11 to rotate forward and backward.
In the present embodiment, the power seat 1, the radar camera module 3, and the acceleration sensor module 4 are common components of an intelligent automobile, and are common devices that are easy to configure for low-end vehicles without these modules, and can be finely adjusted based on existing mechanisms. The control module 2 is an existing module in the airbag ECU, and therefore, the protection system can achieve the protection effect by basically adopting an existing device.
The protection system makes a complete rear-end collision protection strategy aiming at a human body whiplash injury mechanism, monitors the car following condition behind a car before the rear end collision occurs so as to timely carry out danger avoiding operation, and rotates the backrest 112 of the electric seat 1 backwards according to the impact degree of a driver and passengers on the backrest 112 of the electric seat 1 when the rear end collision occurs, so that the head, the neck and the back of the human body are optimally protected, the safety cover can be emergently tightened when the rear end collision occurs, the protection of the driver and passengers is further enhanced, fine adjustment is carried out based on the existing mechanism, comprehensive safety performance protection can be realized, and low cost and high benefit are realized.
In a preferred embodiment, the impact torque is calculated by the following equation:
My＝m*Acc*S
where My denotes an impact moment, m denotes an upper mass, acc denotes second acceleration information, and S denotes an upper centroid distance.
In this embodiment, before the rear-end collision occurs, the control module 2 performs image recognition on a plurality of rear images collected in a certain time period respectively to determine whether a short-distance car following exists in a preset distance behind the car, and performs comparison analysis on a plurality of radar signals collected in the certain time period to obtain a car following distance and a car following speed of the short-distance car following when the short-distance car following exists, and the control module 2 calculates the rear-end collision time according to the car following distance and the car following speed.
When judging that the vehicle-following time is less than the preset threshold value, the control module 2 sends a first control instruction to the electric seat 1 to control the motor 121 to tighten the seat belt 113. The preset threshold value can be 4s, if the car following time is less than 4s, a first control signal is sent out, the motor 121 tightens the belt seat 111, the human body is restrained in advance, and the sitting posture is corrected. And if the car-following time is not less than 4s, sending out first control information, and playing reminding voice by the multimedia in the car.
When a rear-end collision occurs, the impact force F = m Acc of the part of the body of the driver and the passenger above the seat 111 to the backrest 112 can be calculated through the upper mass and the second acceleration information, the impact force is multiplied by the upper centroid distance to obtain the impact moment of the part of the body of the driver and the passenger above the seat 111 to the backrest 112, the torque of the motor 121 is not smaller than the impact moment when the electric seat 1 rotates backwards, namely, the backward tilting angle of the electric seat 1 is adjusted according to the impact moment, so that the impact of the backrest 112 to the driver and the passenger during the rear-end collision is removed, the seat 111 moves along with the back of the human body, and the head, the neck and the back of the human body are optimally protected. The protection system can be combined with drivers and passengers of different body types to form optimal protection, and meanwhile, the drivers and passengers can also adjust input parameters to adjust the protection strategy according to the self state, for example, the user weight is manually input in advance.
The top mass can also be set to an adjustable mode, with the user adjusting the presets based on his own needs after purchasing the vehicle.
The present application is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present application, and such modifications and improvements are also considered to be within the scope of the present application.

Claims (9)

1. A protection system for coping with a rear-end collision of an automobile, comprising:
a power seat including a seat portion including a seat, a backrest, and a seat belt, and a seat control portion including a motor controlling the seat portion to rotate forward or backward;
the radar camera module is used for collecting obstacle information behind the automobile;
the acceleration sensor module is used for acquiring first acceleration information of the automobile;
a user information acquisition module for acquiring an upper mass and an upper centroid distance; the upper mass refers to the mass of the part of the body of the driver and the passenger above the seat; the upper mass center distance refers to the distance between the mass center of the part of the body of the driver and the passenger above the seat and the center of the rotating shaft of the motor;
the control module is used for processing according to the obstacle information to obtain a first control instruction so as to control the danger avoiding operation of the automobile before the rear-end collision occurs; the seat back frame is also used for processing to obtain second acceleration information of the driver and the passenger according to the first acceleration information when a rear-end collision occurs, and processing to obtain impact torque of the driver and the passenger relative to the backrest and a corresponding second control instruction according to the upper mass, the second acceleration information and the upper mass center distance so as to control the back-rotation operation of the electric seat, wherein the motor torque is not less than the impact torque during the back-rotation operation; when rear-end collision occurs, the control module processes the first acceleration information according to a preset acceleration coefficient to obtain second acceleration information; when judging that the car following time is smaller than a preset threshold value, the control module sends a first control instruction to the electric seat to control a motor of the electric seat to tighten a safety belt.
2. A protection system against a rear-end collision of an automobile according to claim 1, wherein the seat control portion further includes a pretensioner that controls tightness of a seat belt;
the second control instruction is also used for controlling the pretensioner to tighten the safety belt.
3. The system for protecting against a rear-end collision of an automobile according to claim 1, wherein the radar camera module includes:
a radar module which collects a radar signal behind the vehicle using a radar installed at a rear portion of the vehicle;
and the camera module is used for collecting a rear image behind the automobile by utilizing a camera arranged at the tail part of the automobile.
4. The protection system for dealing with the rear-end collision of the automobile according to claim 3, wherein before the rear-end collision occurs, the control module respectively performs image recognition on a plurality of rear images collected within a certain time period to judge whether a short-distance automobile following exists within a preset distance behind the automobile, and performs comparison analysis on a plurality of radar signals collected within a certain time period when the short-distance automobile following is judged to exist, so as to obtain the automobile following distance and the automobile following speed of the short-distance automobile following, and the control module calculates the automobile-end collision time according to the automobile following distance and the automobile following speed.
5. The system for protecting against a rear-end collision of an automobile according to claim 1, wherein the acceleration sensor module comprises:
the tail acceleration sensor is arranged at the tail of the automobile and used for acquiring the tail acceleration of the tail of the automobile;
the middle acceleration sensor is arranged in the middle channel of the automobile and used for acquiring the middle acceleration of the middle channel of the automobile;
and the first acceleration calculating unit is used for calculating to obtain first acceleration information according to the vehicle tail acceleration and the first acceleration information.
6. The system for protecting against rear-end collisions according to claim 1, wherein the user information acquiring module includes:
the image collector is arranged in front of an electric seat in the automobile and is used for collecting body images of the body of a driver and a passenger above the seat; and/or
And the contact sensor is arranged inside the backrest and used for acquiring the contact position of the head of the driver and the backrest.
7. The system for protecting against rear-end collisions according to claim 6, wherein the user information acquiring module includes:
the weighing sensor is arranged below the seat and used for collecting the upper mass of the body of the part of the driver above the seat;
and the centroid distance calculation unit is used for carrying out image recognition on the body image to obtain the body height of the part of the body of the driver above the seat or obtaining the body height of the part of the body of the driver above the seat according to the contact position, and processing the body height according to a preset centroid coefficient to obtain the upper centroid distance.
8. The protection system for the rear-end collision of the automobile according to claim 1, wherein the control module calculates the impact torque by the following formula:
My＝m*Acc*S
wherein, the first and the second end of the pipe are connected with each other,
my represents the impact moment;
m represents the upper mass;
acc represents second acceleration information;
s represents the upper centroid distance.
9. A protection method for dealing with automobile rear-end collision is characterized by comprising the following steps:
acquiring barrier information behind the automobile;
collecting first acceleration information of an automobile;
acquiring an upper mass and an upper centroid distance; the upper mass refers to the mass of the part of the body of the driver and the passenger above the seat; the upper mass center distance refers to the distance between the mass center of the part of the body of the driver and the passenger above the seat and the center of the rotating shaft of the motor;
before rear-end collision occurs, a first control instruction is obtained according to obstacle information processing so as to control danger avoiding operation of the automobile;
when rear-end collision occurs, processing according to the first acceleration information to obtain second acceleration information of the driver and the passengers, processing according to the upper mass, the second acceleration information and the upper mass center distance to obtain impact torque of the driver and the passengers relative to the backrest and a corresponding second control command so as to control the back rotation operation of the electric seat, wherein the motor torque is not less than the impact torque during the back rotation operation; when rear-end collision occurs, processing the first acceleration information according to a preset acceleration coefficient to obtain second acceleration information; when the vehicle following time is judged to be smaller than a preset threshold value, a first control instruction is sent to the electric seat to control a motor of the electric seat to tighten a safety belt;
the power seat includes a seat portion including a seat, a backrest, and a seat belt, and a seat control portion including a motor controlling the seat portion to rotate forward or backward.
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