阅读说明：本技术 一种仅需极少监测设备的防护人地碰撞损伤的方法 (Method for protecting human-ground collision damage by only needing few monitoring devices ) 是由 邹铁方 周靖 王丹琦 吴悠 刘理 李艳春 于 2021-09-06 设计创作，主要内容包括：针对现有防护人地碰撞损伤的智能车运动控制方法均对车载监测设备有极高要求的现状,提出一种仅需极少监测设备的防护人地碰撞损伤的方法。所述方法包括一智能车运动控制简单方法及与之对应的智能车车头形状。先结合智能车运动控制简单方法对车头参数及控制方法进行优化,然后获得能使控制过程中人地碰撞损伤最低且人车碰撞损伤不增加的最优智能车车头形状及与之对应的智能车运动控制简单方法。本发明的有益效果是：仅需极少监控设备就能控制智能车运动进而降低人地碰撞损伤。(Aiming at the current situation that the existing intelligent vehicle motion control methods for protecting human-ground collision damage have high requirements on vehicle-mounted monitoring equipment, the method for protecting human-ground collision damage only needs few monitoring equipment is provided. The method comprises a simple method for controlling the motion of the intelligent vehicle and the shape of the head of the intelligent vehicle corresponding to the simple method. The method is characterized in that vehicle head parameters and a control method are optimized by combining a simple intelligent vehicle motion control method, and then an optimal intelligent vehicle head shape and a simple intelligent vehicle motion control method corresponding to the optimal intelligent vehicle head shape are obtained, wherein the optimal intelligent vehicle head shape can minimize human-ground collision damage and prevent human-vehicle collision damage from increasing in the control process. The invention has the beneficial effects that: only few monitoring equipment is needed to control the movement of the intelligent vehicle, so that the collision damage of people is reduced.)

1. A method of protecting against human impact injury requiring only minimal monitoring equipment, comprising: the method comprises a simple intelligent vehicle motion control method and an intelligent vehicle head shape corresponding to the simple intelligent vehicle motion control method, wherein the simple intelligent vehicle motion control method comprises the following steps:

s1: when the vehicle detects that the accident is unavoidable, completely braking the vehicle to t1 moment when the head of the human body collides with the vehicle body for the first time;

s2: after the time t1, releasing the vehicle brake, and obtaining a time t2 when the vehicle is fully braked again according to the calculation rule t 2; where t2 is the calculation rule: t2 ═ f (t1), f is some very simple functional relationship between t2 and t 1;

s3: after time t2, fully braking the vehicle to a standstill;

the shape of the head of the intelligent vehicle corresponding to the simple method for controlling the motion of the intelligent vehicle is obtained through the following steps:

s4: constructing a virtual simulation system capable of comprehensively and indiscriminately evaluating human-ground collision damage;

s5: and optimizing the vehicle head shape parameters describing the intelligent vehicle and the t2 calculation rule by combining a simple intelligent vehicle motion control method to obtain the optimal intelligent vehicle head shape which can minimize human-ground collision damage and prevent human-vehicle collision damage from increasing in the control process and the intelligent vehicle motion control simple method corresponding to the optimal intelligent vehicle head shape.

2. The method of safeguarding human impact injuries requiring only minimal monitoring equipment according to claim 1, wherein: in step S4, a virtual simulation system capable of comprehensively and indiscriminately evaluating human-ground collision damage needs to include parameters such as collision vehicle speed, pedestrian height, weight, gait, and the like, wherein the vehicle speed at least includes 20/30/40km/h3 types, the pedestrian height at least includes 4 types of 5-percentile female, 5-percentile male, 50-percentile male and 95-percentile male, the pedestrian weight at least includes 3 types of fat, medium and thin, and the pedestrian gait at least includes dangerous gait in three gait sequences of running, walking and emergency; the input of the system is the parameters of the vehicle head, and the output is the average value of the human-ground collision damage.

3. The method of safeguarding human impact injuries requiring only minimal monitoring equipment according to claim 1, wherein: in the step S5, the optimization of vehicle head parameters is mainly used, the optimization t2 calculation rules are used for assistance, the optimization aims at protecting human-vehicle collision damage and human-ground collision damage in the control process, and the optimization method is a conventional method.

Technical Field

The invention relates to the field of intelligent automobiles, in particular to a method for protecting people from collision and damage, which only needs few monitoring devices.

Background

Since the beginning of the appearance of the intelligent automobile, the intelligent automobile bears a series of tasks of being safer, more efficient, more energy-saving and the like, as an absolute strong person in traffic, the intelligent automobile is obligated to better protect an absolute weak person, namely a pedestrian, among traffic participants, and the life safety of people must be put to the first place from the beginning of the design of the intelligent automobile.

The published related technologies show that the pedestrian collision accident of the intelligent automobile is most likely to be a low-speed accident, and the pedestrian and ground collision damage in the low-speed accident is serious; the real accident statistical result shows that if the human collision damage in the accident below 40km/h can be avoided, the total accident loss of 2/3 can be avoided; and the ground collision damage can be effectively reduced by controlling the vehicle braking, the ground damage can be reduced by about 90 percent optimally, and the ground collision damage is not increased. Through the control to the motion of vehicle in horizontal, vertical to combine gasbag, engine bonnet inclination etc. for human body falls the automobile body earlier before falling to ground, with this buffering ground striking and can change the human body posture of falling to ground, realize protecting to the ground collision injury in view of the above. However, the existing methods are future technologies, and require that a vehicle is equipped with a lot of monitoring devices to acquire the motion posture of the human body in real time so as to adjust the motion of the vehicle. Obviously, a solution requiring only few monitoring devices is needed, that is, a practical method for protecting human and ground collision injuries, which can be implemented by landing, is proposed on the basis of the existing vehicle-mounted device and the monitoring capability thereof as much as possible.

Disclosure of Invention

Aiming at the current situation that the existing intelligent vehicle motion control method for protecting human-ground collision damage has high requirements on vehicle-mounted monitoring equipment, the invention provides a method for protecting human-ground collision damage, which only needs few monitoring equipment, wherein the method comprises a simple intelligent vehicle motion control method and an intelligent vehicle head shape corresponding to the simple intelligent vehicle motion control method, and the simple intelligent vehicle motion control method comprises the following steps:

s1: when the vehicle detects that the accident is unavoidable, completely braking the vehicle to t1 moment when the head of the human body collides with the vehicle body for the first time;

s2: after the time t1, releasing the vehicle brake, and obtaining a time t2 when the vehicle is fully braked again according to the calculation rule t 2; where t2 is the calculation rule: t2 ═ f (t1), f is some very simple functional relationship between t2 and t 1;

s3: after time t2, fully braking the vehicle to a standstill;

the shape of the head of the intelligent vehicle corresponding to the simple method for controlling the motion of the intelligent vehicle is obtained through the following steps:

s4: constructing a virtual simulation system capable of comprehensively and indiscriminately evaluating human-ground collision damage;

s5: and optimizing the vehicle head shape parameters describing the intelligent vehicle and the t2 calculation rule by combining a simple intelligent vehicle motion control method to obtain the optimal intelligent vehicle head shape which can minimize human-ground collision damage and prevent human-vehicle collision damage from increasing in the control process and the intelligent vehicle motion control simple method corresponding to the optimal intelligent vehicle head shape.

The shape of the head of the intelligent vehicle is designed before the motion control of the vehicle is carried out, the motion control simple method of the intelligent vehicle only needs to monitor the time t1 in the implementation process, the existing vehicle-mounted equipment has the capacity, and other higher-quality equipment is not needed, so that the requirement of the vehicle motion control scheme for protecting the human-ground collision damage on the vehicle-mounted monitoring equipment is extremely low, and the method is called as the method for protecting the human-ground collision damage, which only needs few monitoring equipment.

When an accident is monitored to be unavoidable, the vehicle is completely braked to the time t1, then the vehicle brake is released, t2 is calculated by a simple formula according to the monitored t1 or t2 is directly taken as a constant (such as 0.3s, namely the interval between t1 and t2 is 0.3s), and the vehicle is completely braked again until the vehicle is static at the time t2, so that the requirements on vehicle-mounted monitoring equipment are remarkably reduced, the cost of similar equipment is reduced, and the practicability and the implementation of the equipment in the quick future can be guaranteed. However, according to a conventional principle, the protection effect of the method is definitely common, so that the method needs to be optimized by combining the shape of the head of the intelligent vehicle. Firstly, a human-ground collision virtual simulation system containing a variable vehicle head shape is constructed, and then the intelligent vehicle head shape and the t2 calculation rule are optimized, so that the protection effect of the simple method for controlling the intelligent vehicle motion is improved.

Preferably, in step S1, t1 is the time when the head of the human body makes contact with the vehicle body for the first time, and the vehicle is completely braked before the time node, so that on one hand, the speed of the head-vehicle collision time in the human body head-vehicle collision accident can be reduced as much as possible, and thus the head damage is reduced; on the other hand, the vehicle can be ensured to be in a complete braking state (because the monitoring of the vehicle cannot reach t1) in the accident that the head of the human body does not collide with the vehicle body (such as the human body collides with the side face of the vehicle), namely, the vehicle does not need to be controlled in the accident and only needs to be completely braked.

Preferably, in step S2, the t2 calculation rule is: t2 ═ f (t1), f is some very simple functional relationship between t2 and t 1. Here t2 may or may not be a function of t1, but its core implication is that it must be simple and independent of the monitoring device.

Preferably, in step S3, the vehicle must be fully braked after t2 to avoid other dangerous situations such as rolling pedestrians.

Preferably, in step S4, a virtual simulation system capable of comprehensively and indiscriminately evaluating human-ground collision damage needs to include parameters such as collision vehicle speed, pedestrian height, weight, and gait, where the vehicle speed includes at least 20/30/40km/h3 types, the pedestrian height includes at least 4 types of 5-percentile female, 5-percentile male, 50-percentile male, and 95-percentile male, the pedestrian weight includes at least 3 types of fat, medium, and thin, and the pedestrian gait includes at least dangerous gait in three gait sequences of running, walking, and emergency. The input of the system is the parameters of the vehicle head, and the output is the average value of the human-ground collision damage. The reason for using the mean value rather than the weighted mean value as the output is to ensure that the proposed method can provide equal protection for all groups in the process of evaluating the protection effect of the method of the present invention. The essence of controlling vehicle braking to reduce human impact damage is to move the vehicle ahead of the pedestrian and absorb some of the energy of the human falling and change the posture of the human falling, but this process can also be understood as causing the vehicle to impact the pedestrian again, thus leading to a related ethical problem, and for this reason we need to protect all the groups that may occur in the event of an accident without distinction.

Preferably, in step S5, the vehicle head parameters are optimized mainly, and the calculation rule of t2 is optimized, so as to protect the human-vehicle collision damage and the human-ground collision damage in the control process, and the optimization method is a conventional method.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that: only few monitoring equipment is needed to control the movement of the intelligent vehicle, so that the collision damage of people is reduced.

Drawings

FIG. 1 is a flow chart of the method of the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent;

the technical solution of the present invention is further described below with reference to examples.

In the design process, in order to improve the pedestrian protection capability of a certain intelligent vehicle, a simple method for controlling the motion of the intelligent vehicle is firstly provided, and the method comprises the following steps:

s1: when the vehicle detects that the accident is unavoidable, completely braking the vehicle to t1 moment when the head of the human body collides with the vehicle body for the first time;

s2: after the time t1, releasing the vehicle brake, and obtaining a time t2 when the vehicle is fully braked again according to the calculation rule t 2; where t2 is the calculation rule: t2 ═ t1+0.35 s;

s3: after time t2, the vehicle is fully braked to a standstill.

Then, an optimal vehicle head shape matched with the intelligent vehicle motion control simple method is obtained, and the method comprises the following steps:

s4: constructing a virtual simulation system capable of comprehensively and indiscriminately evaluating human-ground collision damage; the system needs to comprise parameters such as collision speed, height of a pedestrian, weight, gait and the like. Here, the vehicle speed includes 20/30/40km/h3, the height of the pedestrian includes 4 types of 5-percentile female, 5-percentile male, 50-percentile male and 95-percentile male, the weight of the pedestrian includes 3 types of fat, middle and thin, and the gait of the pedestrian takes the most dangerous 2 gaits from the three gait sequences of running, walking and emergency. The system inputs the parameters of the locomotive, after the parameters of the locomotive are input, the simulation needs to be carried out for 3 × 4 × 3 × 2 ═ 216 times, and the average value of the collision damage of the human ground is output.

S5: and optimizing the vehicle head shape parameters describing the intelligent vehicle and the t2 calculation rule by combining a simple intelligent vehicle motion control method to obtain the optimal intelligent vehicle head shape which can minimize human-ground collision damage and prevent human-vehicle collision damage from increasing in the control process and the intelligent vehicle motion control simple method corresponding to the optimal intelligent vehicle head shape. According to the prior results, 8 vehicle head parameters including the height of the lower edge of a front bumper, the height of the upper edge of the front bumper, the height of the front edge of an engine cover, the height of the rear edge of the engine cover, the length of the front bumper, the length of the front edge panel of the engine cover, the length of the engine cover and the length of a front windshield can be taken for optimization; for t2, optimization is only required to be performed within a certain range (for example, plus or minus 0.1s) (assuming that the optimization result is t2 ═ t1+0.4s), and it should be particularly noted that the optimization should be a method in which the vehicle head parameters are dominant and the t2 calculation rule is subordinate.

The simple method for controlling the motion of the intelligent vehicle and the shape of the head of the intelligent vehicle matched with the simple method are obtained through the steps, so that the intelligent vehicle completely consistent with the design can be produced, and after the intelligent vehicle encounters an unavoidable human-vehicle collision accident, the human-ground collision damage of a pedestrian involved in the accident can be reduced through the following extremely simple steps:

s1: when the vehicle detects that the accident is unavoidable, completely braking the vehicle to t1 moment when the head of the human body collides with the vehicle body for the first time;

s2: after the time t1, releasing the vehicle brake, and obtaining a time t2 when the vehicle is fully braked again according to the calculation rule t 2; where t2 is the calculation rule: t2 ═ t1+0.4 s;

s3: after time t2, the vehicle is fully braked to a standstill.

Obviously, in the process of protecting pedestrians through the steps, only the parameter t1 needs to be identified by the vehicle-mounted monitoring equipment, and the vehicle-mounted monitoring equipment is not needed in other processes, so that the difficulty of vehicle motion control is remarkably reduced, and the landing practical capability of similar methods is improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.