CN108725366B

CN108725366B - Vehicle safety protection method, device and system

Info

Publication number: CN108725366B
Application number: CN201710244185.4A
Authority: CN
Inventors: 李华斌; 洪浩华; 方嘉
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2017-04-14
Filing date: 2017-04-14
Publication date: 2021-01-29
Anticipated expiration: 2037-04-14
Also published as: CN108725366A

Abstract

A vehicle safety protection method, device and system. The method comprises the following steps: acquiring relative lateral motion parameters of an adjacent vehicle on the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance; estimating a lateral intrusion level of a side impact event according to the relative transverse motion parameter, wherein the lateral intrusion level is positively correlated with the probability of the side impact event; and when the estimated lateral invasion level is greater than a preset first level, controlling a suspension system to lift the body of the vehicle to a preset height so that the adjacent vehicle collides with the threshold beam of the vehicle. By adopting the scheme, the damage degree of the vehicle during side collision can be reduced, and the protection strength of the vehicle passengers is improved.

Description

Vehicle safety protection method, device and system

Technical Field

The invention relates to the technical field of vehicle safety, in particular to a vehicle safety protection method, device and system.

Background

With the continuous development of vehicles, vehicles are becoming an indispensable part of modern life. And vehicle intelligence technology is gradually being applied, and a user can easily and safely make a call, listen to music, send and receive information, use navigation, and the like on a vehicle. It is expected that the electronization and intellectualization of the vehicle will also generate a plurality of new systems and new achievements, so that the driving vehicle becomes more environment-friendly, energy-saving, comfortable and pleasant. However, regardless of the development of the vehicle, driving safety is an important factor.

At present, in order to guarantee the safety of passengers in a vehicle, the current vehicle speed is collected, whether vehicle collision occurs or not is judged according to the current vehicle speed, and if the vehicle collision occurs, a corresponding protective airbag is released.

However, the above-mentioned vehicle safety protection method has problems that the vehicle is seriously damaged and the protection strength for the vehicle passengers is low.

Disclosure of Invention

The invention solves the technical problem of how to reduce the damage degree of the vehicle during side collision and improve the protection force on the vehicle passengers.

In order to solve the above technical problem, an embodiment of the present invention provides a vehicle safety protection method, including: acquiring relative lateral motion parameters of an adjacent vehicle on the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance; estimating a lateral intrusion level of a side impact event according to the relative transverse motion parameter, wherein the lateral intrusion level is positively correlated with the probability of the side impact event; and when the estimated lateral invasion level is greater than a preset first level, controlling a suspension system to lift the body of the vehicle to a preset height so that the adjacent vehicle collides with the threshold beam of the vehicle.

Optionally, the estimating a lateral intrusion level of a side impact event according to the relative lateral motion parameter comprises: when the relative transverse speed is smaller than a preset first relative transverse speed threshold value, estimating the lateral invasion level of the side impact event as the lowest level, wherein the lowest level is smaller than the first level, and the side impact event does not occur; when the relative transverse speed is greater than a preset second relative transverse speed threshold value, estimating the lateral invasion level of the side collision event as a highest level, wherein the highest level is greater than the first level, and the second relative transverse speed threshold value is greater than the first relative transverse speed threshold value; estimating a lateral intrusion level of a side impact event according to a relationship between the relative lateral distance and a preset safe distance threshold when the relative lateral speed is greater than the first relative lateral speed threshold, less than the second relative lateral speed threshold, and the relative lateral distance is less than the relative lateral distance threshold, wherein: the relative transverse distance threshold value and the relative transverse movement speed meet a preset relation.

Optionally, the preset relationship that the relative lateral distance threshold and the relative lateral movement speed satisfy is:

wherein, V_tFor relative transverse movement speed, S_maxFor the relative lateral distance threshold, β is the friction factor between the wheels of the adjacent vehicle on the side of the vehicle and the ground, and g is the acceleration of gravity.

Optionally, the controlling the suspension system to raise the body of the vehicle to a preset height when the estimated lateral intrusion level is greater than a preset first level includes: when the estimated lateral intrusion level is greater than a preset first level, calculating the time length required by the side impact event; the method comprises the steps of obtaining the time length required by the suspension system to lift the vehicle body of the vehicle to a preset height, and controlling the suspension system to lift the vehicle body of the vehicle to the preset height before a side collision event occurs.

Optionally, the suspension system comprises: motor, motor drive and raise the part, wherein: the motor driver is coupled with the motor and is suitable for driving the motor to work according to the received lifting instruction; the motor is coupled with the lifting part and is suitable for driving the lifting part to lift the vehicle body of the vehicle to a preset height when in work.

Optionally, when the estimated lateral intrusion level is greater than a preset first level, controlling the suspension system to lift the vehicle body to a preset height comprises: when the estimated lateral invasion level is greater than the first level, generating a lifting instruction; and sending the lifting instruction to the motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

Optionally, the elevation component comprises: connecting rod, sub vehicle frame, damping device, xarm and bearing frame, wherein: the auxiliary frame is suitable for being connected with a vehicle body of the vehicle; the first end part of the connecting rod is hinged with a motor push rod of the motor, the second end part of the connecting rod is hinged with the cross arm and is hinged with the damping device, and the connecting rod is suitable for rotating by a corresponding angle to drive the damping device to move when the motor pushes the motor push rod; one end of the damping device is connected with the vehicle body, and the other end of the damping device is hinged with the connecting rod and is suitable for driving the vehicle body of the vehicle to rise or fall in the vertical direction through movement; two ends of the cross arm are respectively hinged with the corresponding bearing seats; the bearing seat is connected with the wheel of the vehicle.

Optionally, the hinge point of the connecting rod and the shock absorbing device is close to the second end.

Optionally, two ends of the cross arm are hinged to corresponding bearing seats respectively by joint bearings.

Optionally, the cross-arm comprises: the upper cross arm is arranged above the lower cross arm, and the first end part of the connecting rod is hinged with the lower cross arm; and two ends of the upper cross arm and two ends of the lower cross arm are respectively hinged with the corresponding bearing seats.

Optionally, the number of the upper cross arms and the number of the lower cross arms are both 2; the motor is arranged in the motor mounting plate; the motor mounting plate is positioned in a space defined by the upper cross arm and the lower cross arm, is fixedly mounted on the lower cross arm and is positioned in the middle of the lower cross arm.

Optionally, the number of the motors is 2, the number of the links is 2, and each motor corresponds to 1 link, and the raising member further includes: and two ends of each cross rod are respectively fixedly arranged on the 2 lower cross arms and are perpendicular to the lower cross arms, a central hole is formed in the second end part of each connecting rod, and the cross rods penetrate through the central holes to hinge the connecting rods with the corresponding lower cross arms.

Optionally, the method further comprises: and when the lateral invasion level is greater than a preset second level, controlling an alarm reminding device to send out an alarm reminding, wherein the second level is less than the first level.

Optionally, the controlling the alarm reminding device to issue the alarm reminding includes: and acquiring preset alarm reminding frequency corresponding to the lateral invasion level, and controlling an alarm reminding device to output alarm reminding with corresponding frequency, wherein the alarm reminding frequency is positively correlated with the lateral invasion level.

Optionally, the method further comprises: and when a vehicle body height adjusting instruction input by a user is received and the vehicle is detected to be in a static state, controlling the suspension system to adjust the vehicle body height to a corresponding height according to the vehicle body height adjusting instruction.

Optionally, the estimating a lateral intrusion level of a side impact event according to the relative lateral motion parameter comprises: and when the relative transverse distance is detected to be smaller than a preset minimum safety distance and the relative transverse speed is equal to 0, estimating the lateral invasion level of the side impact event to be a lowest level, wherein the lowest level is lower than the first level, and the side impact event does not occur.

Optionally, the estimating a lateral intrusion level of a side impact event according to the relative lateral motion parameter comprises: when the relative transverse distance is detected to be smaller than a preset minimum safety distance and the relative transverse speed is far away from the vehicle, estimating the lateral invasion level of the side impact event to be a lowest level, wherein the lowest level is lower than the first level, and the side impact event does not occur.

An embodiment of the present invention further provides a vehicle safety protection device, including: an acquisition unit adapted to acquire relative lateral motion parameters of an adjacent vehicle to the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance; the estimation unit is used for estimating the lateral invasion level of the side impact event according to the relative transverse motion parameter, wherein the lateral invasion level is positively correlated with the probability of the side impact event; and the control unit is suitable for controlling the suspension system to lift the body of the vehicle to a preset height when the estimated lateral invasion level is greater than a preset first level, so that the adjacent vehicle collides with the threshold beam of the vehicle.

Optionally, the estimating unit is adapted to estimate a lateral intrusion level of a side impact event as a lowest level when the relative lateral velocity is less than a preset first relative lateral velocity threshold, wherein the lowest level is less than the first level and no side impact event occurs; when the relative transverse speed is greater than a preset second relative transverse speed threshold value, estimating the lateral invasion level of the side collision event as a highest level, wherein the highest level is greater than the first level, and the second relative transverse speed threshold value is greater than the first relative transverse speed threshold value; estimating a lateral intrusion level of a side impact event according to a relationship between the relative lateral distance and a preset safe distance threshold when the relative lateral speed is greater than the first relative lateral speed threshold, less than the second relative lateral speed threshold, and the relative lateral distance is less than the relative lateral distance threshold, wherein: the relative transverse distance threshold value and the relative transverse movement speed meet a preset relation.

Optionally, the control unit is adapted to calculate a time period required for a side impact event to occur when the estimated lateral intrusion level is greater than a preset first level; the method comprises the steps of obtaining the time length required by the suspension system to lift the vehicle body of the vehicle to a preset height, and controlling the suspension system to lift the vehicle body of the vehicle to the preset height before a side collision event occurs.

Optionally, the control unit is adapted to generate a lifting instruction when the estimated lateral intrusion level is greater than the first level; and sending the lifting instruction to the motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

Optionally, the vehicle safety device further comprises: and the alarm reminding unit is suitable for carrying out alarm reminding when the lateral invasion level is greater than a preset second level, wherein the second level is less than the first level.

Optionally, the alarm reminding unit is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level and output an alarm reminding with a corresponding frequency, where the alarm reminding frequency is positively correlated with the lateral intrusion level.

Optionally, the vehicle safety device further comprises: the receiving unit is suitable for receiving a vehicle body height adjusting instruction input by a user; and the control unit is also suitable for controlling the suspension system to adjust the height of the vehicle body to a corresponding height according to the vehicle height adjusting instruction after receiving the vehicle height adjusting instruction and when detecting that the vehicle is in a static state.

Optionally, the estimating unit is adapted to estimate the lateral intrusion level of the side impact event as a lowest level when it is detected that the relative lateral distance is less than a preset minimum safety distance and the relative lateral velocity is equal to 0, wherein the lowest level is lower than the first level and no side impact event occurs.

Optionally, the estimating unit is adapted to estimate the lateral intrusion level of the side impact event as a lowest level when it is detected that the relative lateral distance is less than a preset minimum safety distance and the relative lateral speed is away from the vehicle, wherein the lowest level is lower than the first level and the side impact event does not occur.

An embodiment of the present invention further provides a vehicle safety protection system, including: a suspension system and any one of the vehicle safety devices coupled thereto.

Optionally, the suspension system comprises: motor, motor drive and raise the part, wherein: the motor driver is coupled with the motor and is suitable for driving the motor to work according to a received lifting instruction, and the lifting instruction is generated by the vehicle safety protection device; the motor, with it is coupled to raise the part, be suitable for during operation, it will to drive to raise the part the automobile body of vehicle is raised to preset height, makes adjacent vehicle with the threshold roof beam of vehicle bumps mutually.

Optionally, the vehicle safety protection device is adapted to generate a lifting instruction and send the lifting instruction to the motor driver when the estimated lateral intrusion level is greater than a preset first level; the motor driver is suitable for driving the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height according to the lifting instruction.

Optionally, the elevation member comprises: connecting rod, sub vehicle frame, damping device, xarm and bearing frame, wherein: the auxiliary frame is suitable for being connected with a vehicle body of the vehicle; the first end part of the connecting rod is hinged with a motor push rod of the motor, the second end part of the connecting rod is hinged with the cross arm and is hinged with the damping device, and the connecting rod is suitable for rotating by a corresponding angle to drive the damping device to move when the motor pushes the motor push rod; one end of the damping device is connected with the vehicle body, and the other end of the damping device is hinged with the connecting rod and is suitable for driving the vehicle body of the vehicle to rise or fall in the vertical direction through movement; two ends of the cross arm are respectively hinged with the corresponding bearing seats; the bearing seat is connected with the wheel of the vehicle.

Optionally, the vehicle safety protection system further comprises: an alarm reminding device; the vehicle safety protection device is suitable for controlling an alarm reminding device to send out an alarm reminding when the lateral invasion level is larger than a preset second level, wherein the second level is lower than the first level.

Optionally, the vehicle safety protection device is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level, and control the alarm reminding device to output an alarm reminding with a corresponding frequency, where the alarm reminding frequency is positively correlated to the lateral intrusion level.

Optionally, the alarm reminding device comprises at least one of: a buzzer and an indicator light.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

when two vehicles collide laterally, mainly the longitudinal beam of the coming vehicle collides with the B column of the collided vehicle body, the vehicle with a lower chassis is seriously damaged, and the danger degree of passengers is higher. In a vehicle, a rocker beam of the vehicle is more stable than a B-pillar structure of a vehicle body and is more difficult to crush by collision. Therefore, in the event of a side impact, the height of the vehicle body, i.e., the position at which the impact force acts, is closely related to the degree of damage to the vehicle caused by the side impact and the safety of the occupants in the vehicle. The collision action when the vehicle takes place the side impact does the effect on the threshold roof beam, can effectual reduction side impact to the vehicle damage degree and to the injury degree of passenger. Therefore, the relative transverse motion parameters of adjacent vehicles on the side face of the vehicle are obtained, when the estimated lateral invasion level of the collision event is larger than a preset first level according to the obtained relative transverse motion parameters, the suspension system is controlled to lift the vehicle body of the vehicle to a preset height, so that the adjacent vehicles collide with the doorsill beam of the vehicle when side collision occurs, and therefore the damage degree of the vehicle during the side collision can be reduced, and the protection strength of passengers in the vehicle is improved.

Further, when the estimated lateral intrusion level is greater than a preset first level, calculating the time length required by the occurrence of the side impact event, and controlling a suspension system to lift the body of the vehicle to a preset height before the side impact event occurs. Before the side impact event happens, the vehicle body of the vehicle is actively lifted to a preset height, so that the damage degree of the vehicle during side impact can be effectively reduced, and the protection force for passengers in the vehicle is improved.

Further, when the lateral invasion level is greater than a preset second level, the alarm reminding device is controlled to give an alarm reminding, a driver can be reminded of the lateral invasion condition of the adjacent vehicle and the vehicle, and the second level is smaller than the first level, namely the alarm reminding occurs before the height of the vehicle body of the vehicle is raised by the suspension system, so that the driver can have enough time to adjust the running state of the current vehicle, and protection preparation is made in advance, and therefore the occurrence of a side collision event can be effectively avoided.

Furthermore, according to the difference of the lateral invasion levels, the alarm reminding device is controlled to output the alarm reminding with the corresponding frequency, so that the driver can visually know the current lateral invasion level of the vehicle according to the alarm reminding frequency, and the driver can take corresponding protective measures according to the lateral invasion level to avoid the occurrence of side impact events.

Further, when an automobile body height adjusting instruction is received and the automobile is detected to be in a static state, the automobile body height is adjusted according to the automobile body height adjusting instruction, so that the bearing force of the automobile on side collision is actively enhanced, and the safety protection force of passengers in the automobile is improved.

Further, when the relative transverse distance is detected to be smaller than the preset minimum safety distance and the relative transverse speed is equal to 0, the side impact event is judged not to occur, so that the height of the vehicle body of the vehicle is not adjusted when the vehicle is in some special working conditions, the energy consumption of the vehicle is saved, and the service life of a suspension system is prolonged.

Drawings

FIG. 1 is a flow chart of a vehicle safety protection method according to an embodiment of the invention;

FIG. 2 is a front elevational view of a suspension system in an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a suspension system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a vehicle safety shield apparatus in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of another vehicle safety shield apparatus in accordance with an embodiment of the present invention.

Detailed Description

As described above, the vehicle safety protection method in the prior art has the problems of serious damage to the vehicle and low protection strength for the vehicle.

In order to solve the problem, in the embodiment of the invention, the relative transverse motion parameter of the adjacent vehicle on the side of the vehicle is acquired, and when the estimated lateral intrusion level of the collision event is greater than the preset first level according to the acquired relative transverse motion parameter, the suspension system is controlled to lift the body of the vehicle to the preset height, so that the adjacent vehicle collides with the doorsill beam of the vehicle when side collision occurs, and the damage degree of the vehicle during side collision can be reduced and the protection strength of passengers in the vehicle can be improved.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, a flowchart of a vehicle safety protection method according to an embodiment of the present invention is shown, and the following detailed description is provided through specific steps.

And 11, acquiring relative transverse motion parameters of adjacent vehicles on the side of the vehicle and the vehicle.

In a specific implementation, the relative lateral motion parameters may include: relative lateral velocity and relative lateral distance. Other relative lateral motion parameters may be obtained by those skilled in the art, depending on the actual requirements. It will be appreciated that in the event of a side impact event, the vehicle is herein a side-impacted vehicle and the adjacent vehicle to the side of the vehicle is a side-impact vehicle. Wherein the relative lateral movement speed refers to a relative speed of the adjacent vehicle in a lateral direction with respect to the vehicle, and the relative lateral distance refers to a relative distance of the adjacent vehicle in a lateral direction with respect to the vehicle, the lateral direction being perpendicular to a forward direction of the vehicle.

In particular implementations, sensors may be employed to acquire relative lateral motion parameters of the adjacent vehicles. For example, the relative lateral velocity is acquired using a velocity sensor, and the relative lateral distance is acquired and acquired using a distance sensor. In practical applications, the sensor for acquiring the relative lateral motion parameter may be the speed sensor and the distance sensor which are relatively independent, or may be the same sensor having the function of acquiring the relative lateral speed and the relative lateral distance.

In one embodiment of the present invention, in order to realize the omnidirectional monitoring of the side driving environment of the vehicle, sensors are respectively installed on both sides of the vehicle. The installation positions of the sensors are suitable for acquiring the relative transverse speed and the relative transverse distance of the adjacent vehicles, and the specific installation positions and the number are not limited herein.

In a specific implementation, the sensor may be an ultrasonic sensor or a laser ranging sensor. It can be understood that in practical application, radar and the like can be adopted to acquire the lateral motion parameters of the adjacent vehicles, and the lateral motion parameters can be specifically selected according to practical application scenes and requirements.

And step 12, estimating the lateral invasion level of the side impact event according to the relative transverse motion parameters.

In a specific implementation, the sensor generally has a certain detection range for surrounding adjacent vehicles, and the relative lateral motion parameters of the adjacent vehicles can be acquired and acquired only when the adjacent vehicles are in the detection range of the sensor.

In specific implementation, the ultrasonic sensor and the laser ranging sensor both have a certain ranging range, and when the adjacent vehicle of the vehicle is detected to be in the ranging range of the ultrasonic sensor and the laser ranging sensor, the speed and the distance of the adjacent vehicle can be collected.

In a specific implementation, after the relative lateral motion parameter is obtained, a lateral intrusion level of the side impact event may be estimated according to the relative lateral motion parameter, where the lateral intrusion level is positively correlated with the probability of the side impact event, that is, the higher the lateral intrusion level is, the higher the probability of the side impact event is, and correspondingly, the lower the lateral intrusion level is, the lower the probability of the side impact event is.

And step 13, controlling a suspension system to lift the body of the vehicle to a preset height when the estimated lateral intrusion level is greater than a preset first level.

In specific implementation, the estimated lateral invasion level is compared with a preset first grade, when the estimated lateral invasion level is greater than the preset first grade, the probability of a side collision event between the adjacent vehicle and the vehicle is higher, and a suspension system is controlled to lift the body of the vehicle to a preset height. After the body of the vehicle is raised, the threshold beam of the vehicle is correspondingly raised. When the body of the vehicle is at a preset height, if a side impact event occurs, the adjacent vehicle will collide with the sill beam part of the vehicle.

In a specific implementation, the preset height is related to the height of the vehicle chassis from the ground, and the preset height can be determined through big data analysis. Generally, when the vehicle chassis is lower than the ground, the value corresponding to the preset height is larger, correspondingly, when the vehicle chassis is higher than the ground, the value corresponding to the preset height is smaller, and the value can be specifically set according to the actual condition of the vehicle.

According to the method, the relative transverse motion parameters of the adjacent vehicles on the side surfaces of the vehicles are obtained, when the estimated lateral invasion level of the collision event is larger than the preset first level according to the obtained relative transverse motion parameters, the suspension system is controlled to lift the vehicle bodies of the vehicles to the preset height, so that the adjacent vehicles collide with the threshold beams of the vehicles when side collision occurs, the threshold beams are good in firmness and not easy to deform, more energy generated during side collision acts on the threshold beams of the vehicles, the lateral invasion amount of the vehicles can be reduced, the vehicle bodies of the vehicles are lifted to the preset height when the estimated lateral invasion level is larger than the preset first level, and the damage degree of the vehicles during side collision can be effectively reduced and the protection force on passengers in the vehicles can be improved.

In a specific implementation, in step 12, when the intrusion level of the side impact event is estimated, the relative speed of the critical point of the side impact event and the relative speed of the side impact event that must occur when the adjacent vehicle is present in the measurement range of the sensor can be respectively calculated according to the maximum distance measurement range corresponding to the sensor used.

The critical point relative velocity at which a side impact event occurs is recorded as the minimum relative lateral velocity. When the collected relative lateral velocity of the adjacent vehicle is less than or equal to the minimum relative lateral velocity, no side impact event occurs; a side impact event may occur when the collected relative lateral velocity of the adjacent vehicle is greater than a minimum relative lateral velocity.

The relative velocity at which a side impact event must occur may be recorded as the maximum relative lateral velocity. When the acquired relative lateral velocity of the adjacent vehicle is greater than the maximum relative lateral velocity, a side impact event inevitably occurs according to the driving states of the vehicle and the adjacent vehicle at the time.

In particular implementations, the lateral motion parameter can be used to estimate a lateral intrusion level for a side impact event by:

for example, when the relative transverse speed is less than a preset first relative transverse speed threshold value, the lateral invasion level of the side impact event is estimated to be a lowest level, wherein the lowest level is less than the first level, and when the lowest level is reached, the side impact event does not occur. In a specific implementation, the first relative lateral velocity threshold may be a minimum relative lateral velocity, may also be smaller than the minimum relative lateral velocity, and may also be determined through a side impact experiment in the Chinese New Car Assessment Protocol (CNCAP), where the determination is performed according to a damage degree of the vehicle and a damage degree and a damage probability of an occupant in the vehicle when two vehicles are subjected to side impact, and generally, when the vehicle is impacted by a low-speed vehicle, the damage degree of the vehicle is low, and the damage degree and the damage probability of the occupant in the vehicle are also relatively small.

For another example, when the relative lateral velocity is greater than a preset second relative lateral velocity threshold, the lateral intrusion level of the side impact event is estimated to be a highest level, the highest level is greater than the first level, and the second relative lateral velocity threshold is greater than the first relative lateral velocity threshold. The side impact event must occur when the side intrusion level is the highest level. The second relative lateral velocity threshold may be a maximum relative lateral velocity, and may also be determined by a side impact experiment in the CNCAP, and when the relative lateral velocity of the adjacent vehicle exceeds a certain velocity threshold, no matter whether the vehicle is lifted, side impact inevitably occurs, and the vehicle and passengers in the vehicle are injured safely.

For another example, when the relative lateral velocity is greater than the first relative lateral velocity threshold, less than the second relative lateral velocity threshold, and the relative lateral distance is less than the relative lateral distance threshold, a lateral intrusion level of a side impact event is estimated based on a relationship between the relative lateral distance and a preset safe distance threshold, wherein: the relative transverse distance threshold value and the relative transverse movement speed meet a preset relation.

In an embodiment of the present invention, the relative lateral distance threshold and the relative lateral speed satisfy a preset relationship as shown in formula (1):

wherein, V_tFor relative transverse movement speed, S_maxAs a relative lateral distance thresholdThe value β is the friction factor between the wheels of the adjacent vehicle on the side of the vehicle and the ground, and g is the acceleration of gravity.

In specific implementation, a plurality of safety distance thresholds between the adjacent vehicles can be set according to trial run experimental analysis, and different safety distance thresholds respectively correspond to corresponding lateral intrusion levels. For example, the safety distance threshold includes S0, S1, S2, … …, Sn which are decreased in sequence, wherein the lateral intrusion level of S0 is 0, and no side impact event occurs; the lateral invasion level corresponding to the S1 is level 1, a side collision event can occur, and the occurrence probability is low; the lateral intrusion level corresponding to S2 is level 2, the lateral intrusion level corresponding to Sn is level n, and as the safety distance threshold decreases, the lateral intrusion level increases and the probability of the side impact event also increases accordingly.

In an implementation, in order to improve the estimation accuracy of the lateral intrusion level, the stored relative lateral speed and the stored relative lateral distance may be compared with the relative lateral speed and the stored relative lateral distance according to the relative lateral speed and the relative lateral distance, so as to determine the lateral intrusion level corresponding to the relative lateral speed and the relative lateral distance of the current adjacent vehicle.

In a specific implementation, in step 13 provided in the above embodiment of the present invention, the suspension system may be controlled to raise the body of the vehicle to a preset height in the following manner:

and when the estimated lateral intrusion level is greater than a preset first level, calculating the time required by the distance side impact event, and acquiring the time required by the suspension system to lift the vehicle body of the vehicle to a preset height. According to the time length required by the side impact event and the time length required by the suspension system to lift the vehicle body to the preset height, before the side impact event occurs, the suspension system is controlled to lift the vehicle body of the vehicle to the preset height.

In a specific implementation, the length of time required for the suspension system to raise the body of the vehicle to a preset height can be verified through experiments, calculated and stored.

In order to make the invention more understandable and practical for those skilled in the art, fig. 2 shows a schematic structural diagram of a vehicle safety protection system in an embodiment of the invention, and the structure of a suspension system is described below with reference to fig. 2.

In a specific implementation, the suspension system may include: motor 21, motor drive 22 and elevating means, wherein:

and the motor driver 22 is coupled with the motor 21 and is adapted to drive the motor 21 to work when receiving the lifting command.

The motor 21 is coupled with the lifting part and is suitable for driving the lifting part to lift the body of the vehicle to a preset height when in work. In one embodiment of the present invention, the motor may be a linear motor.

In a specific implementation, the lifting instruction is generated when the estimated lateral intrusion level is higher than a preset first level. After the lifting instruction is generated, the generated lifting instruction can be sent to a motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

In a specific implementation, the raising component may include a link 231, a subframe 232, a shock absorbing device 233, a cross arm 234, and a bearing seat 235, wherein:

the subframe 232 is connected to the body of the vehicle, and one end of the damping device 233 is connected to the body of the vehicle, and the other end is hinged to the connecting rod 231. In an embodiment of the present invention, the damping device 233 is hinged to the link 231 at a position near the second end of the link 231. By designing the position where the damping device 233 is hinged to the link 231 near the second end, the transmission efficiency of the force between the damping device 233 and the vehicle body can be improved, thereby achieving the purpose of lifting the vehicle body to a predetermined height with a small force.

The link 231 includes a first end portion hinged to the motor push rod of the motor 21 and a second end portion hinged to the cross arm 234. The motor driver 22 drives the motor 21 to push out the motor push rod, and the link 231 is rotated by a corresponding angle around a position where the second end portion is hinged to the cross arm 234 by the motor push rod. When the link 231 rotates, the damping device 233 hinged to the link 231 moves accordingly. Since one end of the damping device 233 is connected to the vehicle body and the other end is hinged to the connecting rod 231, the vertical acting force can be transmitted to the vehicle body when the damping device moves, so as to drive the vehicle body of the vehicle to rise or fall in the vertical direction.

The two ends of the cross arm 234 are hinged with corresponding bearing seats 235 respectively. The bearing housing 235 is connected to a wheel of the vehicle. In an embodiment of the present invention, the bearing seat 235 is hinged to the vehicle of the vehicle by using a joint bearing so as not to affect the rotation of the wheel of the vehicle.

In one embodiment, the cross arm 234 includes an upper cross arm and a lower cross arm arranged in parallel, and the upper cross arm is disposed above the lower cross arm. The two ends of the upper cross arm and the lower cross arm are hinged to the bearing seats 235 respectively. The first end of the link 231 is hinged to the lower cross arm.

In a specific implementation, the number of the upper cross arms and the number of the lower cross arms are 2; a space is formed between the upper cross arm and the lower cross arm, a motor mounting plate is fixedly mounted in the middle of the lower cross arm, the motor mounting plate is located in the space formed between the upper cross arm and the lower cross arm, and the motor mounting plate is used for mounting the motor 21.

In practical applications, the suspension system of the vehicle is generally divided into a front suspension and a rear suspension, wherein the front suspension is disposed between two front wheels of the vehicle, and the rear suspension is disposed between two rear wheels of the vehicle. Suspension systems can be further divided into independent and non-independent suspension systems. The front wheel and the rear wheel of the vehicle can both adopt independent suspension systems, also can both adopt non-independent suspension systems, and also can adopt independent suspension systems for the front wheel and adopt non-independent suspension systems for the rear wheel.

In specific implementation, the suspension system provided by the embodiment of the invention can be used as a rear suspension of a vehicle and can also be used as a front suspension of the vehicle. For example, the suspension system is used as a rear suspension of the vehicle, and a motor 21 is mounted on the left side of the rear suspension, and a link is correspondingly provided. The left side lift of the vehicle can be controlled. As another example, in order to achieve all-directional protection of both sides of the vehicle, two motors 21 are symmetrically disposed in the suspension system. For another example, the suspension system provided in the embodiment of the present invention is used for both the front suspension and the rear suspension of the vehicle, and each of the front suspension and the rear suspension is provided with 2 motors.

For convenience of understanding, a vehicle safety protection method and a suspension system are described below with reference to fig. 2 and 3 by taking the number of the motors 21 in the suspension system as an example, and fig. 3 is a schematic perspective view of a suspension system according to an embodiment of the present invention.

In a specific implementation, 2 motors 21 are symmetrically installed on the motor installation plate, and then the motor installation plate and the guide rail are connected, and the motor installation plate is placed in the auxiliary frame 232. Accordingly, the number of the connecting rods 231 is two, and the connecting rods are respectively hinged with the corresponding motors 21. The elevation feature may also include 2 crossbars 236. The link 231 is hinged to the lower cross arm in the following manner: the two ends of the cross rod 236 are respectively fixed on the 2 lower cross arms and are perpendicular to the lower cross arms. The second end of the link 231 is provided with a central hole through which the cross bar passes to hinge the link with a corresponding lower cross arm.

In an implementation, the position where the cross bar 236 is specifically connected to the lower cross arm may be determined according to the type of the motor 21, the length of the motor push rod, the length of the connecting rod 231, and the preset height of the lifting. The crossbar 236 is typically connected to the lower cross arm at a location where the lower cross arm is proximate to the bearing seat 235.

In a specific implementation, the upper cross arm and the lower cross arm may be of an integral structure, or may be of a multi-segment structure. When the upper cross arm or the lower cross arm is of a multi-section structure, each section can be connected by adopting a joint bearing. In an embodiment of the present invention, the upper cross arm and the lower cross arm are both multi-segment. Taking one of the lower cross arms as an example, the lower cross arm includes a first section, a second section and a third section, and the second section is located between the first section and the third section. The first section is connected with the second section through a joint bearing, the second section is connected with the third section through a joint bearing, and the first section and the second section are hinged with bearing seats on the corresponding sides respectively. The two ends of the cross bar 236 are fixedly mounted on the first section of the lower cross arm respectively.

In specific implementation, in order to enable a driver to visually know the lateral invasion condition of an adjacent vehicle to the vehicle, the driver can have enough time to adjust the running state of the current vehicle, and protection preparation is made in advance, so that the side impact event can be effectively avoided. In an embodiment of the present invention, when the lateral intrusion level is greater than a preset second level, the alarm reminding device is controlled to issue an alarm reminder, wherein the second level is smaller than the first level.

In particular implementation, the lateral invasion condition of the adjacent vehicle to the vehicle can be more intuitively known to a driver. In an embodiment of the present invention, a preset alarm reminding frequency corresponding to the lateral intrusion level is obtained, and an alarm reminding device is controlled to output an alarm reminding with a corresponding frequency, where the alarm reminding frequency is positively correlated to the lateral intrusion level.

In specific implementation, the alarm reminding device can be a buzzer, an indicator light, or both. It will be appreciated that other means for alerting the alarm may be used in practice.

In an embodiment of the present invention, when the lateral intrusion level reaches a level corresponding to a corresponding alarm reminder, an alarm reminding frequency corresponding to the lateral intrusion level is determined, and the buzzer is controlled to emit a buzzer sound with a corresponding frequency. The higher the lateral invasion level is, the higher the alarm reminding frequency is, and the more rapid the buzzer corresponding to the buzzer is; the lower the lateral invasion level is, the lower the alarm reminding frequency is, and the more moderate the buzzer corresponding to the buzzer is.

In another embodiment of the invention, when the lateral invasion level reaches the level corresponding to the corresponding alarm prompt, the alarm prompt frequency corresponding to the lateral invasion level is determined, and the buzzer indicator light is controlled to flash at the corresponding frequency. The higher the lateral invasion level is, the higher the alarm reminding frequency is, and the shorter the time interval between two blinks of the indicator light is; the lower the lateral invasion level is, the lower the alarm reminding frequency is, and the longer the time interval between two blinks of the indicator light is.

In another embodiment of the present invention, when the lateral intrusion level reaches a level corresponding to the corresponding alarm reminding, the buzzer and the indicator lamp may be simultaneously controlled to operate at the corresponding alarm reminding frequency.

In the specific implementation, in order to prevent the occurrence of a side collision event, the method for adjusting the height of the vehicle body comprises the steps of reducing the damage degree of the vehicle and improving the protection strength of passengers in advance when the vehicle is in a side collision event.

In an embodiment of the invention, a vehicle body height adjusting button is arranged in a cab of the vehicle, and when a user triggers the vehicle body height adjusting button, a corresponding vehicle body height adjusting instruction can be generated and sent to a controller. The controller receives the vehicle body height adjusting instruction, and when the controller detects that the running speed of the current vehicle is 0, the controller can control the suspension system to adjust the vehicle body height to the corresponding height according to the vehicle body height adjusting instruction, so that the vehicle body posture is actively adjusted, and the active protection against side collision is realized.

In specific implementation, the vehicle body can be lifted to a corresponding height by adjusting the extension length of the motor push rod of the motor 21 and driving the damping device 233 through the connecting rod 231 hinged to the motor 21, and after the height of the vehicle body is changed, correspondingly, the distance between the wheels and the vehicle body is also changed.

In practical application, the actual driving condition of the vehicle is relatively complex, when the vehicle is in some special driving conditions, for example, when the vehicle passes through a width limiting door, the vehicle stops in a narrow parking space and the adjacent vehicle overtakes closely, the suspension system may not be controlled to lift the vehicle body, however, the lateral intrusion level is estimated according to the acquired relative transverse motion parameters, and false triggering may be caused according to the relationship between the lateral intrusion level and the preset first level.

In order to improve the triggering accuracy of controlling the suspension system to lift the vehicle body and avoid false triggering, in an embodiment of the invention, when the lateral intrusion level of the side impact event is estimated according to the relative transverse motion parameter, when the relative transverse distance is detected to be smaller than a preset minimum safety distance and the relative transverse speed is equal to 0, the lateral intrusion level of the side impact event is estimated to be a minimum level, and the minimum level is lower than the first level, so that the side impact event does not occur. At the moment, the vehicle may be in a running condition that the vehicle passes through a width-limiting door or stops in a narrow parking space, and the probability of side impact events is low, so that false triggering can be avoided, and the triggering accuracy of controlling a suspension system to lift the vehicle body is improved.

In another embodiment of the present invention, in estimating the lateral intrusion level of the side impact event according to the relative lateral motion parameter, when it is detected that the relative lateral distance is less than a preset minimum safety distance and the relative lateral velocity is away from the vehicle, the lateral intrusion level of the side impact event is estimated to be a lowest level, the lowest level being less than the first level.

In order to facilitate better understanding and realization of the invention by those skilled in the art, embodiments of the invention also provide a vehicle safety guard device.

Referring to fig. 4, a schematic structural diagram of a vehicle safety protection device according to an embodiment of the present invention is shown. The vehicle safety guard may include: an obtaining unit 41, an estimating unit 42 and a control unit 43, wherein:

the obtaining unit 41 is adapted to obtain a relative lateral motion parameter of an adjacent vehicle to the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance;

the estimation unit 42 is used for estimating a lateral invasion level of the side impact event according to the relative transverse motion parameter, wherein the lateral invasion level is positively correlated with the probability of the side impact event;

the control unit 43 is adapted to control the suspension system to raise the body of the vehicle to a preset height such that the adjacent vehicle collides with the rocker beam of the vehicle when the estimated lateral intrusion level is greater than a preset first level.

In a specific implementation, the vehicle safety protection device may be a single chip microcomputer. The vehicle safety shield apparatus may be independent of the suspension system or may be integrated into the suspension system.

In a specific implementation, the estimating unit 42 is adapted to estimate, when the relative lateral speed is less than a preset first relative lateral speed threshold, that the lateral intrusion level of the side impact event is a minimum level, the minimum level is less than the first level, and the side impact event does not occur; when the relative transverse speed is greater than a preset second relative transverse speed threshold value, estimating the lateral invasion level of the side collision event as a highest level, wherein the highest level is greater than the first level, and the second relative transverse speed threshold value is greater than the first relative transverse speed threshold value; estimating a lateral intrusion level of a side impact event according to a relationship between the relative lateral distance and a preset safe distance threshold when the relative lateral speed is greater than the first relative lateral speed threshold, less than the second relative lateral speed threshold, and the relative lateral distance is less than the relative lateral distance threshold, wherein: the relative transverse distance threshold value and the relative transverse movement speed meet a preset relation.

In an embodiment of the present invention, the predetermined relationship that the relative lateral distance threshold and the relative lateral movement speed satisfy is:

V_tfor relative transverse movement speed, S_maxFor the relative lateral distance threshold, β is the friction factor between the wheels of the adjacent vehicle on the side of the vehicle and the ground, and g is the acceleration of gravity.

In a specific implementation, the control unit 43 is adapted to calculate a time period required for a side impact event to occur when the estimated lateral intrusion level is greater than a preset first level; the method comprises the steps of obtaining the time length required by the suspension system to lift the vehicle body of the vehicle to a preset height, and controlling the suspension system to lift the vehicle body of the vehicle to the preset height before a side collision event occurs.

In a specific implementation, the suspension system includes: motor, motor drive and raise the part, wherein: the motor driver is coupled with the motor and is suitable for driving the motor to work according to the received lifting instruction; the motor is coupled with the lifting part and is suitable for driving the lifting part to lift the vehicle body of the vehicle to a preset height when in work.

In a specific implementation, the control unit 43 is adapted to generate a lifting instruction when the estimated lateral intrusion level is greater than a preset first level; and sending the lifting instruction to the motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

Referring to fig. 5, a schematic structural diagram of another vehicle safety protection device in an embodiment of the present invention is shown, in a specific implementation, in order to enable a driver to intuitively know whether a side collision time between an adjacent vehicle and the vehicle is possible, on the basis of fig. 4, the vehicle safety protection device may further include: and the alarm reminding unit 44 is suitable for carrying out alarm reminding when the lateral invasion level is greater than a preset second level, wherein the second level is lower than the first level.

In a specific implementation, the alarm reminding unit 44 is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level, and output an alarm reminding with a corresponding frequency, where the alarm reminding frequency is positively correlated to the lateral intrusion level.

In a specific implementation, the vehicle safety device may further include: a receiving unit 45 adapted to receive a vehicle height adjusting instruction input by a user; the control unit 43 is further adapted to control the suspension system to adjust the height of the vehicle body to a corresponding height according to the vehicle height adjustment instruction after receiving the vehicle height adjustment instruction and when detecting that the vehicle is in a stationary state.

In a specific implementation, the estimating unit 42 is adapted to estimate the lateral intrusion level of the side impact event as the lowest level when the relative transverse distance is detected to be less than the preset minimum safety distance and the relative transverse speed is equal to 0, wherein the lowest level is lower than the first level and the side impact event does not occur.

In a specific implementation, the estimating unit 42 is adapted to estimate the lateral intrusion level of the side impact event as a lowest level when the relative lateral distance is detected to be less than a preset minimum safety distance and the relative lateral speed is detected to be away from the vehicle, wherein the lowest level is lower than the first level and the side impact event does not occur.

In order to facilitate better understanding and implementation of the present invention for those skilled in the art, embodiments of the present invention also provide a vehicle safety protection system. The vehicle safety protection system will be described in detail with reference to fig. 2 and 3.

In a specific implementation, the suspension system may include: the raised feature and any of the vehicle safety guards (not shown) provided by the above embodiments of the present invention.

In particular, the vehicle safety protection device can be independent from the suspension system or integrated with the suspension system, and can be determined by actual requirements in the vehicle design process.

In a specific implementation, the suspension system includes: motor, motor drive and raise the part, wherein:

the motor driver 22 is coupled to the motor 21, and is capable of driving the motor 21 to operate when receiving a lifting command generated by the vehicle safety protection device. The motor 21 is coupled with the lifting part, and can drive the lifting part to lift the body of the vehicle to a preset height during working, so that the adjacent vehicle collides with the threshold beam of the vehicle.

In a specific implementation, the vehicle safety protection device is adapted to generate a lifting command and send the lifting command to the motor driver 22 when the estimated lateral intrusion level is greater than a preset first level; the motor driver 22 is adapted to drive the motor 21 to drive the lifting component to lift the vehicle body of the vehicle to a preset height according to the lifting instruction.

In a specific implementation, the elevation component may include: connecting rod 231, sub vehicle frame 232, damping device 233, xarm 234 and bearing frame 235, wherein:

the subframe 232 is connected to the body of the vehicle. The link 231 includes a first end portion hinged to the motor push rod of the motor 21 and a second end portion hinged to the cross arm 234 and hinged to the damping device 233, and when the motor 21 pushes the motor push rod, the link can rotate by a corresponding angle to drive the damping device 233 to move. The damping device 233, one end of which is connected to the vehicle body and the other end of which is hinged to the link 231, may move to raise or lower the vehicle body of the vehicle in a vertical direction. The two ends of the cross arm 234 are hinged with corresponding bearing seats 235 respectively. The bearing housing 235 is connected to a wheel of the vehicle.

In an embodiment of the present invention, the link 231 is hinged to the damping device 233 near a second end of the link 231.

In a specific implementation, the two ends of the cross arm 234 may be hinged to the corresponding bearing seats 235 by using joint bearings.

In a specific implementation, the cross arm 234 may include: an upper cross arm and a lower cross arm which are arranged in parallel, wherein the upper cross arm is arranged above the lower cross arm, and a first end part of the connecting rod 231 is hinged with the lower cross arm; and two ends of the upper cross arm and two ends of the lower cross arm are respectively hinged with the corresponding bearing seats 235.

In a specific implementation, the number of the upper cross arms and the number of the lower cross arms are 2; the motor 21 is arranged in the motor mounting plate; the motor mounting plate is positioned in a space defined by the upper cross arm and the lower cross arm, is fixedly mounted on the lower cross arm and is positioned in the middle of the lower cross arm.

In an embodiment of the present invention, the number of the motors 21 is 2, the number of the links 231 is 2, and each motor corresponds to 1 link 231, and the raising member further includes: 2 cross bars 236. The two ends of the cross bar 236 are respectively fixed on 2 lower cross arms and are perpendicular to the lower cross arms, the second end of the connecting rod 231 is provided with a central hole, and the cross bar penetrates through the central holes to hinge the connecting rod with the corresponding lower cross arms.

In another embodiment of the present invention, the elevation means may comprise 4 crossbars 236, wherein 2 crossbars 236 are connected to the lower cross arm and the remaining 2 crossbars 236 are connected to the upper cross arm, and for convenience of description, the crossbars 236 connected to the lower cross arm may be referred to as lower crossbars and the crossbars 236 connected to the upper cross arm may be referred to as upper crossbars. Specifically, two ends of the lower cross bar are respectively and fixedly arranged on the 2 lower cross bars and are perpendicular to the lower cross bars, a central hole is formed in the second end of the connecting rod 231, and the lower cross bar penetrates through the central hole to hinge the connecting rod with the corresponding lower cross bar. Two ends of the upper cross bar are respectively fixedly arranged on the 2 upper cross arms and are vertical to the upper cross arms. In specific implementation, the upper cross bars are respectively parallel to the corresponding lower cross bars, the positions of the upper cross bars and the lower cross bars can be on the same vertical line or not, and the specific positions can be selected according to actual needs. With 4 crossbars 236, the stability of the suspension system can be improved.

In a specific implementation, in order to enable a driver to intuitively know whether an adjacent vehicle may form a side collision to the host vehicle, in an embodiment of the present invention, the vehicle safety protection system may further include an alarm reminding device (not shown). And when the lateral invasion level is greater than a preset second level, the vehicle safety protection device controls an alarm reminding device to send out an alarm reminding, wherein the second level is lower than the first level. Generally, when the vehicle safety protection device firstly controls the alarm reminding device to carry out alarm reminding so as to enable a driver to have enough time to adjust the running state of the vehicle, the vehicle safety protection device periodically tracks and monitors the adjacent vehicles, and when the lateral invasion level is increased to the first level, the vehicle safety protection device controls the lifting part to lift the body of the vehicle to a preset height.

In a specific implementation, the alarm reminding device can be installed in a cab, so that a driver can be reminded of the alarm conveniently.

In specific implementation, in order to enable a driver to intuitively know the current lateral invasion level of the vehicle according to the alarm reminding frequency, corresponding protective measures can be taken according to the lateral invasion level so as to avoid the occurrence of a side impact event. In an embodiment of the present invention, the vehicle safety protection device is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level, and control the alarm reminding device to output an alarm reminding with a corresponding frequency, where the alarm reminding frequency is positively correlated to the lateral intrusion level.

In a specific implementation, the alarm reminding device may include a buzzer, may also include an indicator light, and may also include a buzzer and an indicator light at the same time.

In a specific implementation, the working principle and the process of the vehicle safety protection system may refer to the description of the vehicle safety protection method or the vehicle safety protection device provided in the above embodiments of the present invention, and are not described herein again.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of vehicle safety protection, comprising:

acquiring relative lateral motion parameters of an adjacent vehicle on the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance;

estimating a lateral intrusion level of a side impact event according to the relative transverse motion parameter, wherein the lateral intrusion level is positively correlated with the probability of the side impact event;

when the estimated lateral intrusion level is greater than a preset first level, controlling a suspension system to lift the body of the vehicle to a preset height so that the adjacent vehicle collides with a threshold beam of the vehicle;

the suspension system includes: motor, motor drive and raise the part, wherein:

the motor driver is coupled with the motor and is suitable for driving the motor to work according to the received lifting instruction;

the motor is coupled with the lifting part and is suitable for driving the lifting part to lift the body of the vehicle to a preset height when in work;

the elevation part includes: connecting rod, sub vehicle frame, damping device, xarm and bearing frame, wherein:

the auxiliary frame is suitable for being connected with a vehicle body of the vehicle;

the first end part of the connecting rod is hinged with a motor push rod of the motor, the second end part of the connecting rod is hinged with the cross arm and is hinged with the damping device, and the connecting rod is suitable for rotating by a corresponding angle to drive the damping device to move when the motor pushes the motor push rod;

one end of the damping device is connected with the vehicle body, and the other end of the damping device is hinged with the connecting rod and is suitable for driving the vehicle body of the vehicle to rise or fall in the vertical direction through movement;

two ends of the cross arm are respectively hinged with the corresponding bearing seats;

the bearing seat is connected with the wheel of the vehicle.

2. The vehicle safety shield method of claim 1, wherein estimating a lateral intrusion level of a side impact event based on the relative lateral motion parameters comprises:

when the relative transverse speed is smaller than a preset first relative transverse speed threshold value, estimating the lateral invasion level of the side impact event as the lowest level, wherein the lowest level is smaller than the first level, and the side impact event does not occur;

when the relative transverse speed is greater than a preset second relative transverse speed threshold value, estimating the lateral invasion level of the side collision event as a highest level, wherein the highest level is greater than the first level, and the second relative transverse speed threshold value is greater than the first relative transverse speed threshold value;

estimating a lateral intrusion level of a side impact event according to a relationship between the relative lateral distance and a preset safe distance threshold when the relative lateral speed is greater than the first relative lateral speed threshold, less than the second relative lateral speed threshold, and the relative lateral distance is less than the relative lateral distance threshold, wherein: the relative transverse distance threshold value and the relative transverse movement speed meet a preset relation.

3. The vehicle safety protection method according to claim 2, wherein the preset relationship that the relative lateral distance threshold and the relative lateral movement speed satisfy is as follows:

4. The vehicle safety protection method according to claim 1, wherein when the estimated lateral intrusion level is greater than a preset first level, controlling a suspension system to lift a body of the vehicle to a preset height comprises:

when the estimated lateral intrusion level is greater than a preset first level, calculating the time length required by the side impact event;

the method comprises the steps of obtaining the time length required by the suspension system to lift the vehicle body of the vehicle to a preset height, and controlling the suspension system to lift the vehicle body of the vehicle to the preset height before a side collision event occurs.

5. The vehicle safety protection method according to claim 1, wherein the controlling the suspension system to raise the vehicle body to a preset height when the estimated lateral intrusion level is greater than a preset first level comprises:

when the estimated lateral invasion level is greater than the first level, generating a lifting instruction;

and sending the lifting instruction to the motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

6. The vehicle safety method of claim 1, wherein the link is hinged to the shock absorber proximate the second end.

7. The vehicle safety protection method according to claim 1, wherein the two ends of the cross arm are hinged with the corresponding bearing seats respectively by adopting joint bearings.

8. The vehicle safety method of claim 1, wherein the cross-arm comprises: the upper cross arm is arranged above the lower cross arm, and the first end part of the connecting rod is hinged with the lower cross arm; and two ends of the upper cross arm and two ends of the lower cross arm are respectively hinged with the corresponding bearing seats.

9. The vehicle safety protection method according to claim 8, wherein the number of the upper cross arms and the lower cross arms is 2; the motor is arranged in the motor mounting plate; the motor mounting plate is positioned in a space defined by the upper cross arm and the lower cross arm, is fixedly mounted on the lower cross arm and is positioned in the middle of the lower cross arm.

10. The vehicle safety shield method of claim 9, wherein the number of motors is 2, the number of links is 2, and each motor corresponds to 1 link, the raising member further comprising: and two ends of each cross rod are respectively fixedly arranged on the 2 lower cross arms and are perpendicular to the lower cross arms, a central hole is formed in the second end part of each connecting rod, and the cross rods penetrate through the central holes to hinge the connecting rods with the corresponding lower cross arms.

11. The vehicle safety protection method according to claim 1, further comprising:

and when the lateral invasion level is greater than a preset second level, controlling an alarm reminding device to send out an alarm reminding, wherein the second level is less than the first level.

12. The vehicle safety protection method according to claim 11, wherein the controlling the alarm prompting device to issue the alarm prompt comprises:

and acquiring preset alarm reminding frequency corresponding to the lateral invasion level, and controlling an alarm reminding device to output alarm reminding with corresponding frequency, wherein the alarm reminding frequency is positively correlated with the lateral invasion level.

13. The vehicle safety protection method according to claim 1, further comprising:

and when a vehicle body height adjusting instruction input by a user is received and the vehicle is detected to be in a static state, controlling the suspension system to adjust the vehicle body height to a corresponding height according to the vehicle body height adjusting instruction.

14. The vehicle safety shield method of claim 1, wherein estimating a lateral intrusion level of a side impact event based on the relative lateral motion parameters comprises:

and when the relative transverse distance is detected to be smaller than a preset minimum safety distance and the relative transverse speed is equal to 0, estimating the lateral invasion level of the side impact event to be a lowest level, wherein the lowest level is lower than the first level, and the side impact event does not occur.

15. The vehicle safety shield method of claim 1, wherein estimating a lateral intrusion level of a side impact event based on the relative lateral motion parameters comprises:

when the relative transverse distance is detected to be smaller than a preset minimum safety distance and the relative transverse speed is far away from the vehicle, estimating the lateral invasion level of the side impact event to be a lowest level, wherein the lowest level is lower than the first level, and the side impact event does not occur.

16. A vehicle safety shield apparatus, comprising:

an acquisition unit adapted to acquire relative lateral motion parameters of an adjacent vehicle to the side of the vehicle and the vehicle, wherein: the relative lateral motion parameters include: relative lateral velocity and relative lateral distance;

the estimation unit is used for estimating the lateral invasion level of the side impact event according to the relative transverse motion parameter, wherein the lateral invasion level is positively correlated with the probability of the side impact event;

a control unit adapted to control a suspension system to raise a body of the vehicle to a preset height such that the adjacent vehicle collides with a rocker beam of the vehicle when the estimated lateral intrusion level is greater than a preset first level;

the suspension system includes: motor, motor drive and raise the part, wherein:

the elevation part may include: connecting rod, sub vehicle frame, damping device, xarm and bearing frame, wherein: the auxiliary frame is connected with the vehicle body of the vehicle;

the connecting rod comprises a first end part and a second end part, wherein the first end part is hinged with a motor push rod of the motor, the second end part is hinged with the cross arm and is hinged with the damping device, and the connecting rod can rotate by a corresponding angle to drive the damping device to move when the motor pushes the motor push rod;

one end of the damping device is connected with the vehicle body, and the other end of the damping device is hinged with the connecting rod and can drive the vehicle body of the vehicle to rise or fall in the vertical direction when moving;

two ends of the cross arm are respectively hinged with corresponding bearing seats; the bearing seat is connected with a wheel of the vehicle.

17. The vehicle safety apparatus of claim 16, wherein the estimation unit is adapted to estimate a side impact event lateral intrusion level as a lowest level when the relative lateral velocity is less than a preset first relative lateral velocity threshold, wherein the lowest level is less than the first level and no side impact event occurs;

18. The vehicle safety apparatus of claim 17, wherein the predetermined relationship that the relative lateral distance threshold and the relative lateral movement speed satisfy is:

19. The vehicle safety apparatus of claim 16, wherein the control unit is adapted to calculate a time period required until a side impact event occurs when the estimated lateral intrusion level is greater than a preset first level; the method comprises the steps of obtaining the time length required by the suspension system to lift the vehicle body of the vehicle to a preset height, and controlling the suspension system to lift the vehicle body of the vehicle to the preset height before a side collision event occurs.

20. The vehicle safety apparatus of claim 16, wherein the control unit is adapted to generate a lift command when the estimated lateral intrusion level is greater than the first level; and sending the lifting instruction to the motor driver to drive the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height.

21. The vehicle safety apparatus of claim 16, further comprising: and the alarm reminding unit is suitable for carrying out alarm reminding when the lateral invasion level is greater than a preset second level, wherein the second level is less than the first level.

22. The vehicle safety apparatus of claim 21, wherein the alarm reminding unit is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level and output an alarm reminding with a corresponding frequency, and the alarm reminding frequency is positively correlated with the lateral intrusion level.

23. The vehicle safety apparatus of claim 16, further comprising: the receiving unit is suitable for receiving a vehicle body height adjusting instruction input by a user;

and the control unit is also suitable for controlling the suspension system to adjust the height of the vehicle body to a corresponding height according to the vehicle height adjusting instruction after receiving the vehicle height adjusting instruction and when detecting that the vehicle is in a static state.

24. The vehicle safety apparatus of claim 16, wherein the estimating unit is adapted to estimate the lateral intrusion level of the side impact event as a lowest level when the relative lateral distance is detected to be less than a preset minimum safety distance and the relative lateral velocity is equal to 0, wherein the lowest level is lower than the first level and no side impact event occurs.

25. The vehicle safety apparatus of claim 16, wherein the estimation unit is adapted to estimate the lateral intrusion level for a side impact event as a minimum level when the relative lateral distance is detected to be less than a preset minimum safety distance and the relative lateral velocity is away from the vehicle, wherein the minimum level is lower than the first level and no side impact event occurs.

26. A vehicle safety shield system, comprising: a suspension system and a vehicle safety shield apparatus as claimed in any one of claims 16 to 25 coupled thereto;

the suspension system includes: motor, motor drive and raise the part, wherein:

the motor driver is coupled with the motor and is suitable for driving the motor to work according to a received lifting instruction, and the lifting instruction is generated by the vehicle safety protection device;

the motor is coupled with the lifting part and is suitable for driving the lifting part to lift the body of the vehicle to a preset height during working, so that the adjacent vehicle is in collision with a threshold beam of the vehicle;

the elevation member includes: connecting rod, sub vehicle frame, damping device, xarm and bearing frame, wherein:

the bearing seat is connected with the wheel of the vehicle.

27. The vehicle safety system according to claim 26, wherein the vehicle safety device is adapted to generate a lift command and send the lift command to the motor drive when the estimated lateral intrusion level is greater than a preset first level;

the motor driver is suitable for driving the motor to drive the lifting part to lift the vehicle body of the vehicle to a preset height according to the lifting instruction.

28. The vehicle safety shield system of claim 26, wherein said link is hingedly connected to said shock absorbing device proximate said second end.

29. The vehicle safety shield system of claim 26, wherein the cross arm is pivotally connected at each end to a respective bearing seat by a knuckle bearing.

30. The vehicle safety shield system of claim 26, wherein said cross-arm comprises: the upper cross arm is arranged above the lower cross arm, and the first end part of the connecting rod is hinged with the lower cross arm; and two ends of the upper cross arm and two ends of the lower cross arm are respectively hinged with the corresponding bearing seats.

31. The vehicle safety shield system of claim 30, wherein said upper cross arm and said lower cross arm are each 2 in number; the motor is arranged in the motor mounting plate; the motor mounting plate is positioned in a space defined by the upper cross arm and the lower cross arm, is fixedly mounted on the lower cross arm and is positioned in the middle of the lower cross arm.

32. The vehicle safety shield system of claim 31, wherein said number of motors is 2, said number of links is 2, and each motor corresponds to 1 link, said elevation member further comprising: and two ends of each cross rod are respectively fixedly arranged on the 2 lower cross arms and are perpendicular to the lower cross arms, a central hole is formed in the second end part of each connecting rod, and the cross rods penetrate through the central holes to hinge the connecting rods with the corresponding lower cross arms.

33. The vehicle safety shield system of claim 26, further comprising: an alarm reminding device;

the vehicle safety protection device is suitable for controlling an alarm reminding device to send out an alarm reminding when the lateral invasion level is larger than a preset second level, wherein the second level is lower than the first level.

34. The vehicle safety protection system according to claim 33, wherein the vehicle safety protection device is adapted to obtain a preset alarm reminding frequency corresponding to the lateral intrusion level, and control an alarm reminding device to output an alarm reminding with a corresponding frequency, wherein the alarm reminding frequency is positively correlated with the lateral intrusion level.

35. A vehicle safety protection system according to claim 33 or 34, wherein said alarm notification means comprises at least one of: a buzzer and an indicator light.