Pedestrian head collision protection control system and method based on rotatable wiper shaft

Abstract

The invention discloses a pedestrian head collision protection control system and method based on a rotatable wiper shaft. Pre-judging the head drop point of the pedestrian according to the motion trail of the pedestrian around the vehicle driving environment; when the head falling point is located in the dangerous area of the windscreen wiper shaft, the windscreen wiper shaft is rotated by a set angle to a target point; the target point is a position which is obtained after arrangement checking of the windscreen wiper shaft in the vehicle design stage and meets the target value of the energy absorption space. In an unavoidable pedestrian-vehicle accident, whether the windscreen wiper shaft is rotated to increase the energy absorption space or not is determined by judging the head drop point of a pedestrian; in combination with an active safety technology, collision is pre-judged and braking avoidance is performed, and head drop point protection is pre-judged when avoidance cannot be performed; the high requirements of pedestrian head protection on windscreen wiper arrangement and windscreen wiper shaft fracture characteristics are effectively met.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle collision protection control, and in particular relates to a pedestrian head collision protection control system and method based on a rotatable wiper shaft. Background Art

[0002] With the continuous development of the automotive industry, the number of cars on the road is constantly increasing. According to statistics, vehicle-pedestrian collisions are one of the most frequent road traffic accidents. Pedestrians, as a vulnerable group on the road, are easily injured by vehicles in accidents, and head injuries account for a higher proportion than other parts of the body.

[0003] Wiper shafts don't deform or absorb energy when a pedestrian's head collides with a vehicle, making them a hard spot for pedestrians. Automakers need to implement targeted design solutions during vehicle development. Currently, the industry's primary mitigation strategies include placing the wiper shaft under the engine while meeting energy absorption requirements and employing breakaway wiper shaft designs. However, these approaches have their limitations. Placing the wiper shaft under the hood while meeting energy absorption requirements imposes high requirements and space constraints on overall layout and space. Breakaway wiper shaft designs must ensure that the wiper's fracture characteristics meet both design requirements and the functional requirements of the wiper itself. This requires precise design and control of the shaft's fracture force, necessitating verification and analysis during the design phase. After the wiper system is designed and manufactured, subsystem testing and actual vehicle crash testing are required to verify that the wiper shaft's fracture characteristics meet pre-designed design requirements and pedestrian protection performance. If later verification fails to meet pre-set targets, redesign and verification are necessary, significantly increasing project development timelines and costs. Summary of the Invention

[0004] In order to solve the problem that the energy absorption space at the hard point position of the wiper shaft cannot meet the design and performance requirements due to styling, space limitations, wiper system functional requirements, etc. during the vehicle development and design stage, and to improve the efficiency of vehicle collision design and verification, the present invention proposes a pedestrian head collision protection control system and method based on a rotatable wiper shaft.

[0005] A pedestrian head impact protection control system based on a rotatable wiper shaft to achieve one of the objectives of the present invention comprises:

[0006] Collision monitoring module: used to predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment;

[0007] The wiper shaft rotation execution module is used to rotate the wiper shaft to a set angle to a target point when the vehicle's head lands within the wiper shaft's danger zone. This target point is the location that meets the target energy absorption capacity, which is confirmed during the vehicle design phase through wiper shaft layout verification. The energy absorption capacity describes the amount of space within which a structure can absorb energy and deform in extreme situations such as collisions. This space is typically measured in units of length.

[0008] Furthermore, the system also includes a first determination module for determining whether to monitor the movement trajectories of pedestrians around the vehicle's driving environment based on a first determination method. The first determination method includes: if the current vehicle speed is less than or equal to a set threshold, then the movement trajectories of pedestrians around the vehicle's driving environment are not monitored. The technical effect is that by setting the vehicle speed threshold, it is possible to distinguish between low-speed driving and relatively high-speed driving. When driving at low speeds, the system determines that the driver has sufficient time and reaction time to stop the vehicle and avoid a potential collision, and therefore does not activate the pedestrian collision protection system. This reduces unnecessary system intervention in low-speed situations, improves the rationality and accuracy of system response, and reduces energy consumption.

[0009] Furthermore, the system includes a second determination module that determines whether to monitor the movement trajectory of pedestrians in the vehicle's driving environment based on a second determination method. The second determination method includes obtaining the distance between the vehicle and the pedestrian in the vehicle's driving path and the vehicle's braking distance. If the vehicle's braking distance is less than the distance between the vehicle and the pedestrian in the vehicle's driving path, the movement trajectory of the pedestrian in the vehicle's driving environment is not monitored. The technical effect of this is to reduce unnecessary monitoring activities, lower system resource consumption, and avoid misjudgments caused by excessive monitoring.

[0010] Furthermore, the system also includes a third determination module, which is used to confirm whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment according to a third determination method. The third determination method includes: when the vehicle speed is greater than a set threshold and there are pedestrians on the vehicle's driving path, obtaining the distance between the vehicle and the pedestrians on the current vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored.

[0011] Furthermore, the method for predicting the pedestrian's head landing point includes: matching corresponding head landing point position information from a vehicle-pedestrian collision simulation database based on the current pedestrian height, collision conditions, collision position, vehicle collision speed and pedestrian movement trajectory.

[0012] Furthermore, the data generation method in the vehicle-pedestrian collision simulation database includes:

[0013] Select multiple different dummies of different types and typical vehicle-pedestrian collision scenarios. Starting from the vehicle's longitudinal center plane, place dummies at set intervals on both sides of the vehicle, extending to the vehicle's outermost edge, to cover all possible locations where pedestrians might collide with the vehicle.

[0014] Set the vehicle collision speed interval to the set interval; set the vehicle speed increment interval to the set speed;

[0015] Carry out vehicle-pedestrian collision simulation experiments, extract the dummy's motion trajectory and the landing position of the dummy's head during the collision, and store the dummy type, collision conditions, collision position, vehicle collision speed, and the dummy's motion trajectory and head landing position information used under each typical working condition in the vehicle-pedestrian collision simulation database.

[0016] Furthermore, the wiper shaft danger zone includes: a circle which is formed by projecting the wiper shaft vertically onto the outer surface of the engine hood, with the center of the wiper shaft as the center and the width of the human head as the reference radius.

[0017] Furthermore, the calculation method of the set angle includes:

[0018] Obtaining the distance between the vertices of the wiper shaft before and after the rotation according to the coordinates of the upper vertex of the wiper shaft and the target point reached by the upper vertex after the rotation;

[0019] The set angle of rotation of the wiper shaft is obtained according to the designed length of the wiper shaft and the distance between the vertices of the wiper shaft before and after the rotation.

[0020] Furthermore, the calculation formula for setting the angle includes:

[0021]

[0022] Where θ is the set angle of wiper shaft rotation; L is the designed length of the wiper shaft; and S is the distance between the wiper shaft vertices before and after rotation.

[0023] A pedestrian head collision protection control method based on a rotatable wiper shaft to achieve the second objective of the present invention includes:

[0024] Predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment;

[0025] When the head falls within the danger zone of the wiper shaft, the wiper shaft is rotated to a set angle to a target point; the target point is a position that meets the target value of the energy absorption space, and this position is confirmed by checking the wiper shaft layout during the vehicle design phase.

[0026] Furthermore, the method further includes determining whether to monitor the movement trajectories of pedestrians in the vehicle's driving environment based on a first determination method. The first determination method includes not monitoring the movement trajectories of pedestrians in the vehicle's driving environment if the current vehicle speed is less than or equal to a set threshold. This technical step means that at low speeds, the driver can directly brake to the vehicle without initiating or executing the pedestrian head impact protection control method based on the rotatable wiper shaft, thereby conserving vehicle computing resources and energy consumption.

[0027] Furthermore, the system also includes determining whether to monitor the movement trajectory of pedestrians in the vehicle's driving environment based on a second determination method. The second determination method includes obtaining the distance between the vehicle and the pedestrian in the vehicle's driving path and the vehicle's braking distance. If the vehicle's braking distance is less than the distance between the vehicle and the pedestrian in the vehicle's driving path, the movement trajectory of the pedestrian in the vehicle's driving environment is not monitored. The technical effect of this is to reduce unnecessary monitoring activities, lower system resource consumption, and avoid misjudgments caused by excessive monitoring.

[0028] Furthermore, the system also includes determining whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment based on a third determination method. The third determination method includes obtaining the distance between the vehicle and the pedestrians on the current vehicle's driving path and the vehicle's braking distance when the vehicle speed is greater than a set threshold and there are pedestrians on the vehicle's driving path. If the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored. The technical effect is that determining whether there are pedestrians on the current vehicle's driving path requires more computing resources, while the vehicle speed is easier to obtain. This judgment logic can more rationally use computing resources and optimize vehicle energy consumption.

[0029] Furthermore, the method for predicting the pedestrian's head landing point includes: matching corresponding head landing point position information from a vehicle-pedestrian collision simulation database based on the current pedestrian height, collision conditions, collision position, vehicle collision speed and pedestrian movement trajectory.

[0030] Furthermore, the data generation method in the vehicle-pedestrian collision simulation database includes:

[0031] Select multiple different dummies of different types and typical vehicle-pedestrian collision scenarios. Starting from the vehicle's longitudinal center plane, place dummies at set intervals on both sides of the vehicle, extending to the vehicle's outermost edge, to cover all possible locations where pedestrians might collide with the vehicle.

[0032] Set the vehicle collision speed interval to the set interval; set the vehicle speed increment interval to the set speed;

[0033] Carry out vehicle-pedestrian collision simulation experiments, extract the dummy's motion trajectory and the landing position of the dummy's head during the collision, and store the dummy type, collision conditions, collision position, vehicle collision speed, and the dummy's motion trajectory and head landing position information used under each typical working condition in the vehicle-pedestrian collision simulation database.

[0034] Furthermore, the wiper shaft danger zone includes: a circle which is formed by projecting the wiper shaft vertically onto the outer surface of the engine hood, with the center of the wiper shaft as the center and the width of the human head as the reference radius.

[0035] Furthermore, the calculation method of the set angle includes:

[0036] Obtaining the distance between the vertices of the wiper shaft before and after the rotation according to the coordinates of the upper vertex of the wiper shaft and the target point reached by the upper vertex after the rotation;

[0037] The set angle of rotation of the wiper shaft is obtained according to the designed length of the wiper shaft and the distance between the vertices of the wiper shaft before and after the rotation.

[0038] Furthermore, the calculation formula for setting the angle includes:

[0039]

[0040] Where θ is the set angle of wiper shaft rotation; L is the designed length of the wiper shaft; and S is the distance between the wiper shaft vertices before and after rotation.

[0041] The beneficial effects of the present invention include:

[0042] 1. In the event of an unavoidable pedestrian-vehicle traffic accident, the technical solution proposed by the present invention determines whether to activate the rotating wiper shaft by determining whether the pedestrian's head will strike the wiper shaft. This increases the energy absorption space at the wiper shaft location, preventing the pedestrian's head from striking the wiper shaft during the collision and reducing the severity of the pedestrian's head injury. The present invention effectively addresses the restrictions on vehicle space layout imposed by wiper shaft layout due to pedestrian head protection requirements, as well as the high design requirements for wiper shaft fracture characteristics, while also improving the protection of pedestrian heads in the event of a pedestrian-vehicle collision.

[0043] 2. The present invention combines active safety technology to determine the possibility of a collision between a vehicle and a pedestrian during driving. If the distance between the vehicle and the pedestrian is large, the vehicle brakes to avoid the collision. If the collision cannot be avoided, the pedestrian's head landing point is further predicted based on the pedestrian's movement trajectory to further protect the pedestrian's head in the event of a collision, thereby reducing the severity of head injuries in the accident.

[0044] 3. The present invention can effectively solve the restrictions on vehicle space layout caused by the need for pedestrian head protection, as well as the high requirements for the design of the wiper shaft's fracture characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic flow chart of the method of the present invention;

[0046] Figure 2 It is a schematic diagram of pedestrian representation;

[0047] Figure 3 This is a typical working condition diagram of a pedestrian-vehicle collision;

[0048] Figure 4 This is a diagram of the placement of the mannequins;

[0049] Figure 5 This is a schematic diagram of the pedestrian's motion trajectory and head landing position during the collision process in the vehicle-pedestrian collision simulation analysis;

[0050] Figure 6 This is a schematic diagram of the dangerous area of the wiper shaft;

[0051] Figure 7 It is a schematic diagram of the wiper shaft rotation. DETAILED DESCRIPTION

[0052] The following detailed description is intended to explain the technical solutions of the present invention claims, so that those skilled in the art can understand the present claims. The scope of protection of the present invention is not limited to the specific implementation structures described below. Any implementation schemes created by those skilled in the art that incorporate the technical solutions of the present invention claims but differ from the following detailed descriptions are also within the scope of protection of the present invention.

[0053] An embodiment of the present invention provides a pedestrian head collision protection control system based on a rotatable wiper shaft, comprising:

[0054] Collision monitoring module: used to predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment;

[0055] Wiper shaft rotation execution module: used to rotate the wiper shaft to a set angle to a target point when the head falls within the wiper shaft danger zone; the target point is the position that meets the energy absorption space target value obtained after the wiper shaft layout is verified during the vehicle design phase.

[0056] In certain embodiments, the system further includes a first determination module for determining whether to monitor the movement trajectories of pedestrians in the vehicle's driving environment based on a first determination method. The first determination method includes: if the current vehicle speed is less than or equal to a set threshold, then the movement trajectories of pedestrians in the vehicle's driving environment are not monitored. For example, when the vehicle's speed is less than 20 km / h, AEB (Autonomous Emergency Braking) is not activated by default, and no other actions are performed. If there is a risk of the vehicle striking a pedestrian, the driver can brake directly due to the low speed.

[0057] In some embodiments, the system also includes a second determination module for confirming whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment based on a second determination method. The second determination method includes: obtaining the distance between the vehicle and the pedestrians on the vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored.

[0058] In some embodiments, the system further includes a third determination module for determining whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment according to a third determination method. The third determination method includes: when the vehicle speed is greater than a set threshold and there are pedestrians on the vehicle's driving path, obtaining the distance between the vehicle and the pedestrians on the current vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored. For example, when the vehicle speed is greater than 20 km / h, AEB is activated to monitor the vehicle's driving environment. The vehicle's driving route is continuously monitored for pedestrians; if there are pedestrians, the vehicle's driving speed v and the distance s between the vehicle and the pedestrian are identified and read;

[0059] The vehicle's maximum braking deceleration, a, is set to -1g. The stopping distance, s1, is calculated based on the maximum braking deceleration. If s1 < s, there is no risk of a pedestrian collision. The vehicle stops under AEB and driver braking, and no other actions are taken. If s1 ≥ s, there is a risk of a pedestrian collision. The vehicle's onboard camera is used to determine the pedestrian's trajectory and predict the impact point of the pedestrian's head.

[0060] In some embodiments, a method for predicting a pedestrian's head landing point includes matching corresponding head landing position information from a vehicle-pedestrian collision simulation database based on the current pedestrian's height, collision conditions, collision position, vehicle collision speed, and pedestrian's motion trajectory.

[0061] The data generation method in the vehicle-pedestrian collision simulation database includes:

[0062] (1) Select several different types of dummies, such as a 6-year-old child dummy, a 5th percentile female dummy, a 50th percentile male dummy, and a 95th percentile male dummy, to represent pedestrians that may collide with a vehicle, such as Figure 2 As shown;

[0063] (2) Based on traffic accident statistics, several typical vehicle-pedestrian collision conditions are selected, such as vehicle rear-end collision with pedestrian, vehicle vertical collision with pedestrian side, vehicle collision with pedestrian at 45° and 135°, covering most vehicle-pedestrian collision situations in daily life, such as Figure 3 As shown;

[0064] (3) Starting from the longitudinal center plane of the vehicle, place dummies at intervals of 100 mm on both sides of the vehicle until the outermost edge of the vehicle, covering the position where pedestrians may collide with the vehicle, such as Figure 4 As shown;

[0065] (4) The vehicle collision speed range is set to 20 km / h-80 km / h, and the speed increment interval is set to 5 km / h, which can cover the vehicle speeds with a high probability of collision between vehicles and pedestrians in daily life;

[0066] (5) During the vehicle development and design phase, a vehicle-pedestrian collision simulation analysis is carried out based on the above settings to extract the dummy's motion trajectory and head landing position during the collision, such as Figure 5 As shown, the dummy type, collision condition, collision position, vehicle collision speed, dummy's motion trajectory and head landing position information used in each simulation analysis condition are stored in the vehicle-pedestrian collision simulation database.

[0067] When a vehicle-pedestrian collision occurs, the vehicle's onboard camera detects the type of pedestrian, the location of the collision with the vehicle, the angle of collision, and the vehicle's speed. This information is then compared with the simulation analysis information stored in the monitoring module to predict the pedestrian's movement trajectory and possible head landing location.

[0068] The risk of the pedestrian's head hitting the wiper shaft is judged based on the possible landing point of the pedestrian's head. The judgment method includes: when the head landing point is outside the dangerous area of the wiper shaft, there is no risk of the head hitting the wiper shaft, and no other operations are performed; if the head landing point is within the dangerous area of the wiper shaft, there is a risk of the head hitting the wiper shaft, and the wiper shaft rotation action is executed to increase the energy absorption space at the wiper shaft position to the energy absorption space design target value to avoid the head hitting the wiper shaft during a collision, causing pedestrian head injury.

[0069] The wiper shaft danger zone includes: the area where the circle is located when the wiper shaft is vertically projected onto the outer surface of the engine hood, with the center of the wiper shaft as the center and the width of the human head as the reference radius (82.5 mm in this embodiment), such as Figure 6 shown.

[0070] In the initial design state of the wiper shaft (the initial design state is the starting stage of the design and development of the wiper system, and the basic design parameters and characteristics of the wiper shaft are determined for the first time), the upper vertex of the wiper shaft is A, and the coordinates are set to (X1, Y1, Z1). In the initial design state, the energy absorption space AC of the wiper shaft position is h, and the design length OA of the wiper shaft is L. To meet the protection of the pedestrian's head when the pedestrian's head collides with the wiper shaft, the upper vertex of the wiper shaft needs to be rotated to point B under the engine hood, and the coordinates are set to (X2, Y2, Z2). The center point of rotation of the wiper shaft is set to O, and the wiper shaft rotates along the XOZ plane or YOZ plane of the vehicle design reference coordinate system. The rotation angle is θ, and the distance AB between the wiper shaft vertices before and after the rotation is S. The energy absorption space BD of the wiper shaft position after the rotation is equal to the design target value h0. In the vehicle design stage, the coordinate information of point A and point B can be obtained through the wiper shaft layout check, which will not be repeated here. Then there is the following relationship:

[0071] Z1-Z2=h0-h

[0072]

[0073] Then, the wiper shaft is designed to rotate at an angle θ:

[0074]

[0075] An embodiment of the present invention further provides a pedestrian head collision protection control method based on a rotatable wiper shaft, comprising:

[0076] Predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment;

[0077] When the head falls within the danger zone of the wiper shaft, the wiper shaft is rotated to a set angle to a target point; the target point is a position that meets the target value of the energy absorption space, and this position is confirmed by checking the wiper shaft layout during the vehicle design phase.

[0078] In some embodiments, it also includes confirming whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment based on a first judgment method. The first judgment method includes: if the current vehicle speed is less than or equal to a set threshold, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored, which means that when the vehicle speed is low, the driver can brake directly without starting or executing the pedestrian head collision protection control method based on the rotatable wiper shaft, so as to save the vehicle's computing resources and energy consumption.

[0079] In some embodiments, the system further includes determining whether to monitor the movement trajectory of pedestrians in the vehicle's driving environment based on a second determination method. The second determination method includes obtaining the distance between the vehicle and the pedestrian in the vehicle's driving path and the vehicle's braking distance. If the vehicle's braking distance is less than the distance between the vehicle and the pedestrian in the vehicle's driving path, the movement trajectory of the pedestrian in the vehicle's driving environment is not monitored. This technical effect is to reduce unnecessary monitoring activities, lower system resource consumption, and avoid misjudgments caused by excessive monitoring.

[0080] In some embodiments, the system further includes determining whether to monitor the movement trajectory of pedestrians in the vehicle's driving environment based on a third determination method. The third determination method includes: when the vehicle speed is greater than a set threshold and there are pedestrians in the vehicle's driving path, obtaining the distance between the vehicle and the pedestrians in the current vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians in the vehicle's driving path, then not monitoring the movement trajectory of pedestrians in the vehicle's driving environment. The technical effect is that determining whether there are pedestrians in the current vehicle's driving path requires more computing resources, while the vehicle speed is easier to obtain. This determination logic can more rationally use computing resources and optimize vehicle energy consumption.

[0081] In some embodiments, the method for predicting the pedestrian's head landing point includes: matching corresponding head landing point position information from a vehicle-pedestrian collision simulation database based on the current pedestrian height, collision conditions, collision position, vehicle collision speed and pedestrian movement trajectory.

[0082] In some embodiments, the method for generating data in the vehicle-pedestrian collision simulation database includes:

[0083] Select Figure 2 There are many different types of dummies shown, select Figure 3 The following are some typical vehicle-pedestrian collision conditions (vehicle rear-end collision with pedestrian, vehicle vertical collision with pedestrian side, vehicle 45° and 135° collision with pedestrian), as shown in FIG. Figure 4 As shown, starting from the longitudinal center plane of the vehicle, dummies are placed at set intervals on both sides of the vehicle until they reach the outermost side of the vehicle, covering all positions where pedestrians may collide with the vehicle;

[0084] Set the vehicle collision speed interval to the set interval; set the vehicle speed increment interval to the set speed;

[0085] like Figure 5As shown in the figure, a vehicle-pedestrian collision simulation experiment is carried out to extract the dummy's motion trajectory and the landing position of the dummy's head during the collision process. The dummy type, collision condition, collision position, vehicle collision speed, and the dummy's motion trajectory and the landing position of the head under each typical working condition are stored in the vehicle-pedestrian collision simulation database.

[0086] In certain embodiments, as Figure 6 As shown, the wiper shaft danger zone includes: the area where a circle is located when the wiper shaft is vertically projected onto the outer surface of the engine hood, with the center of the wiper shaft as the center and the width of the human head as the reference radius.

[0087] In some embodiments, the method for calculating the set angle includes:

[0088] like Figure 7 As shown, the distance S between the vertices of the wiper shaft before and after the rotation is obtained according to the coordinates of the upper vertex A of the wiper shaft and the target point B reached by the upper vertex A after the rotation;

[0089] According to the designed length L of the wiper shaft and the distance S between the vertices of the wiper shaft before and after the rotation, the set angle of the wiper shaft rotation is obtained, and the calculation formula includes:

[0090] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the steps of the method of the present invention are implemented, which will not be described in detail here.

[0091] The computer-readable storage medium may be the data transmission device provided in any of the aforementioned embodiments or an internal storage unit of a computer device, such as a hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc., provided on the computer device.

[0092] Furthermore, the computer-readable storage medium may include both an internal storage unit of the computer device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the computer device. The computer-readable storage medium may also be used to temporarily store data to be output or that has been output.

[0093] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0095] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0097] An embodiment of the present invention further provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the pedestrian head collision protection control method based on a rotatable wiper shaft.

[0098] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A pedestrian head collision protection control system based on a rotatable wiper shaft, characterized in that: include: Collision monitoring module: used to predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment; Wiper shaft rotation execution module: used to rotate the wiper shaft to a set angle to a target point when the head landing point is within the wiper shaft danger zone; the target point is a position that meets the energy absorption space target value.

2. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 1, characterized in that: It also includes a first determination module, which is used to confirm whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment according to a first determination method. The first determination method includes: if the current vehicle speed is less than or equal to a set threshold, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored.

3. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 1 or 2, characterized in that: It also includes a second determination module, which is used to confirm whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment according to a second determination method. The second determination method includes: obtaining the distance between the vehicle and the pedestrians on the vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored.

4. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 1 or 2, characterized in that: It also includes a third determination module, which is used to confirm whether to monitor the movement trajectory of pedestrians around the vehicle's driving environment according to a third determination method. The third determination method includes: when the vehicle speed is greater than a set threshold and there are pedestrians on the vehicle's driving path, obtaining the distance between the vehicle and the pedestrians on the current vehicle's driving path and the vehicle's braking distance; if the vehicle's braking distance is less than the distance between the vehicle and the pedestrians on the vehicle's driving path, the movement trajectory of pedestrians around the vehicle's driving environment is not monitored.

5. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 1, characterized in that: The method for predicting the pedestrian's head landing point includes: matching corresponding head landing point position information from a vehicle-pedestrian collision simulation database based on the current pedestrian height, collision conditions, collision position, vehicle collision speed and pedestrian movement trajectory.

6. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 5, characterized in that: The data generation method in the vehicle-pedestrian collision simulation database includes: Select multiple different dummies of different types and typical vehicle-pedestrian collision scenarios. Starting from the vehicle's longitudinal center plane, place dummies at set intervals on both sides of the vehicle, extending to the vehicle's outermost edge, to cover all possible locations where pedestrians might collide with the vehicle. Set the vehicle collision speed interval to the set interval; set the vehicle speed increment interval to the set speed; Carry out vehicle-pedestrian collision simulation experiments, extract the dummy's motion trajectory and the landing position of the dummy's head during the collision, and store the dummy type, collision conditions, collision position, vehicle collision speed, and the dummy's motion trajectory and head landing position information used under each typical working condition in the vehicle-pedestrian collision simulation database.

7. The pedestrian head collision protection control system based on a rotatable wiper shaft according to claim 1, characterized in that: The calculation method of the set angle includes: Obtaining the distance between the vertices of the wiper shaft before and after the rotation according to the coordinates of the upper vertex of the wiper shaft and the target point reached by the upper vertex after the rotation; The set angle of rotation of the wiper shaft is obtained according to the designed length of the wiper shaft and the distance between the vertices of the wiper shaft before and after the rotation.

8. A pedestrian head collision protection control method based on a rotatable wiper shaft, characterized in that: include: Predict the pedestrian's head landing point based on the movement trajectory of pedestrians around the vehicle's driving environment; When the head falls within the dangerous area of the wiper shaft, the wiper shaft is rotated by a set angle to a target point; the target point is a position that meets the target value of the energy absorption space.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the pedestrian head collision protection control method based on a rotatable wiper shaft as claimed in claim 8 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the pedestrian head collision protection control method based on a rotatable wiper shaft as described in claim 8 are implemented.

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