Method and device for testing launching condition of pedestrian chest impactor
By constructing an adjustable vehicle model and a pedestrian mannequin, determining and fitting the velocity information and emission angle in the collision simulation model, the problem of setting the launch condition of the pedestrian chest impactor is solved, and the accurate reproduction of chest motion response is achieved.
Patent Information
- Application Number
- CN202411860284.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-21
AI Technical Summary
In the existing pedestrian-vehicle collision simulation test, the launch conditions of pedestrian chest impactors are difficult to accurately set, resulting in inaccurate reproduction of chest motion responses.
By constructing a vehicle model and a pedestrian mannequin with adjustable front-end modeling parameters, a collision simulation model is established, the velocity information and emission angle at the initial moment are determined, and fitted to generate a fitting curve chart, which is used to set the emission conditions of the pedestrian chest impactor.
The accurate setting of the launch conditions of the pedestrian chest impactor is achieved, and the motion response of the chest when the vehicle collides with the pedestrian can be more accurately reflected.
Smart Images
Figure CN119670438A_ABST
Abstract
Description
Technical Field
[0001] One or more embodiments of the present specification relate to automobile collision simulation test technology, and more particularly, to a method and device for testing the firing conditions of a pedestrian chest impactor. Background Art
[0002] With the growth of car ownership, the number of collisions between pedestrians and vehicles is also increasing. The chest is an important part that causes serious injuries or death to pedestrians. In current pedestrian protection tests, the head and legs are mainly tested, and the chest is rarely tested. In addition, the kinematic response of the chest varies greatly among different models during collisions. As a result, when performing pedestrian-vehicle collision simulation tests, the launch conditions of the pedestrian chest impactor need to be manually set based on experience before each simulation, making it difficult for the launch impactor corresponding to the chest to reproduce the motion response of the chest when the vehicle collides with the pedestrian. Summary of the invention
[0003] In order to solve the above problems, one or more embodiments of this specification describe a method and device for testing the firing conditions of a pedestrian chest impactor.
[0004] According to a first aspect, a method for testing a pedestrian chest impactor firing condition is provided, the method comprising: Constructing a vehicle model with adjustable front-end styling parameters, and constructing a collision simulation model based on the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A first marking point, a second marking point and a third marking point are respectively set at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model; For the simulation process of the collision simulation model under any combination of front-end styling parameters, determine the initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determine the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment, and determine the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment; After traversing the simulation process under all front-end modeling parameter combinations, each of the second speed information, the launch angle and the front-end modeling parameter combination is fitted to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0005] Preferably, the constructing of a vehicle model with adjustable front-end styling parameters comprises: Acquire the external dimension data of different types of vehicles, determine the external dimension profile of a median vehicle of the external dimension data, and calculate the front-end modeling parameters of the external dimension profile of the median vehicle; The front-end styling parameters are summarized, a range of the front-end styling parameters is determined, and a vehicle model with adjustable front-end styling parameters is constructed based on the range of the front-end styling parameters.
[0006] Preferably, after respectively setting the first marking point, the second marking point and the third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model, the method further comprises: Sensors are defined at the first marking point, the second marking point and the third marking point respectively, and a speed history curve of the sensor is output.
[0007] Preferably, the first speed information includes the collision speed of the pedestrian human body model relative to the vehicle model, and the second speed information includes the launch speed and speed angle of the pedestrian chest impactor; The determining the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment includes: Based on the speed history curve, the collision speed of the second marking point at the initial moment is determined, the collision speed is set as the launch speed of the pedestrian chest impactor, and the angle between the speed direction of the launch speed and the horizontal plane is set as the speed angle of the pedestrian chest impactor.
[0008] Preferably, the method of determining the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment includes: The first marking point and the third marking point at the initial moment are connected, the horizontal plane projection angle of the connecting line is determined, the difference between the right angle and the horizontal plane projection angle is calculated, and the launch angle of the pedestrian chest impactor is obtained.
[0009] Preferably, the fitting of each combination of the second speed information, the launch angle and the front end modeling parameter to obtain a fitting curve graph for setting the launch conditions of the pedestrian chest impactor includes: receiving a setting instruction for each of the second speed information and the launch angle, and determining setting information set to a fixed value and a front end modeling parameter interval corresponding to the setting information; The second speed information, launch angle and front-end styling parameter combinations corresponding to the non-front-end styling parameter interval are fitted, and the setting information and the front-end styling parameter interval are combined to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0010] Preferably, the method further comprises: The target front-end styling parameters of the actual vehicle are obtained, and the fitting curve diagram is queried based on the target front-end styling parameters to obtain the firing conditions of the pedestrian chest impactor during the simulation process.
[0011] According to a second aspect, a testing device for a pedestrian chest impactor firing condition is provided, the device comprising: A construction module, used to construct a vehicle model with adjustable front-end styling parameters, and to construct a collision simulation model according to the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A setting module, used for setting a first marking point, a second marking point and a third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model respectively; A determination module, for determining, for the simulation process of the collision simulation model under any combination of front-end styling parameters, an initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determining second speed information of the pedestrian chest impactor based on first speed information of the second marking point at the initial moment, and determining a launch angle of the pedestrian chest impactor based on a horizontal plane projection angle of a line connecting the first marking point and the third marking point at the initial moment; The fitting module is used to fit each of the second speed information, the launch angle and the front-end modeling parameter combination after traversing the simulation process under all front-end modeling parameter combinations, and obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0012] According to a third aspect, there is provided an electronic device, comprising a processor and a memory; The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the steps of the method provided in the first aspect or any possible implementation manner of the first aspect.
[0013] According to a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and the computer-readable storage medium stores instructions, which, when the instructions are executed on a computer or a processor, cause the computer or the processor to execute the method provided in the first aspect or any possible implementation of the first aspect.
[0014] The solution provided in the embodiments of this specification can construct a collision simulation model with a vehicle model with adjustable front-end styling parameters and a pedestrian body model, and obtain the second speed information and launch angle determined by the collision simulation model under each front-end styling parameter combination, so as to generate a fitting curve graph by fitting. In actual situations, the launch conditions of the pedestrian chest impactor can be set directly according to the corresponding data determined in the fitting curve graph according to the vehicle model, and the set launch impactor can more accurately reflect the movement response of the chest when the vehicle collides with the pedestrian. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is a flow chart of a method for testing the firing conditions of a pedestrian chest impactor in one embodiment of the present specification.
[0017] Figure 2 It is a schematic diagram of the front-end styling parameters of a car in one embodiment of this specification.
[0018] Figure 3 It is a structural schematic diagram of a testing device for a pedestrian chest impactor firing condition in one embodiment of the present specification.
[0019] Figure 4 It is a structural diagram of an electronic device in one embodiment of this specification. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0021] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present application, and different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, although the embodiment may not be clearly recorded in the following text.
[0022] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.
[0023] See also Figure 1 , Figure 1: is a flow chart of a method for testing the firing conditions of a pedestrian chest impactor provided in an embodiment of the present application. In the embodiment of the present application, the method comprises: S101, constructing a vehicle model with adjustable front-end styling parameters, and constructing a collision simulation model based on the vehicle model and a pedestrian body model.
[0024] The front end styling parameters include the engine hood leading edge height and the engine hood angle.
[0025] The execution entity of this application can be a cloud server.
[0026] In the embodiments of this specification, Figure 2 As shown, the front-end styling parameters of the vehicle include the hood leading edge height (BLEH) corresponding to the vertical distance from the front hood reference line to the ground and the hood angle (BA) corresponding to the angle between the hood and the horizontal line. The cloud server will first obtain the vehicle parameters of different models of vehicles on the market to determine the adjustable range of BLEH and BA, and then build a vehicle model with adjustable front-end styling parameters. The vehicle model can be a simplified vehicle model constructed by modifying the hood structure of the general vehicle model (GV) to a certain extent. The model can include a spoiler, a front bumper, a grille, a hood leading edge and a hood structure. In the process of using the model for simulation testing to determine the launch conditions of the human chest launcher, the structural response under the pedestrian impact load can be simulated by the shell surface, that is, the interface layer (used to simulate the vehicle fascia) and the general foam layer, which is located at the bottom of the rigid skeleton vehicle structure. The vehicle model can achieve adjustable front-end styling parameters by adjusting the bumper height and the hood angle.
[0027] The pedestrian human body model can adopt THUMS V4.02 50 percentile male, the standing posture is TB024 standard posture, and the pedestrian is in a stationary standing posture. A collision simulation model can be constructed based on the pedestrian human body model and the vehicle model. The simulation conditions can be set before the specific simulation process. The collision simulation model is used to obtain the corresponding test data to realize the construction of the fitting curve graph, so as to assist in determining the launch conditions of the launch impactor set on the human chest under complex simulation conditions. Therefore, the simulation conditions of the collision simulation model should not be set too complicated. As an example, the vehicle model can be set to collide with the right side of the pedestrian at a speed of 40km / h, and the friction coefficients between the vehicle and the pedestrian, the pedestrian and the shoe, the shoe and the ground, and the vehicle and the ground are set to 0.2.
[0028] In one possible implementation, the step of constructing a vehicle model with adjustable front-end styling parameters includes: Acquire the external dimension data of different types of vehicles, determine the external dimension profile of a median vehicle of the external dimension data, and calculate the front-end modeling parameters of the external dimension profile of the median vehicle; The front-end styling parameters are summarized, a range of the front-end styling parameters is determined, and a vehicle model with adjustable front-end styling parameters is constructed based on the range of the front-end styling parameters.
[0029] In the embodiment of this specification, the cloud server first obtains the external dimension data of different types of vehicles on the market through a public vehicle data query channel, determines the external dimension profile of the median vehicle in the external dimension data, and determines the corresponding front-end styling parameters through geometric analysis of the external dimension profile of the median vehicle. Then, the front-end styling parameters of different types of vehicles are summarized to determine the range of front-end styling parameters, which is the adjustable range of the vehicle model.
[0030] S102, respectively setting a first marking point, a second marking point, and a third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra, and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model.
[0031] In the embodiments of this specification, according to the size of BLEH, the collision is generally divided into two situations. When the BLEH is low, the lower limbs of the pedestrian first contact the front edge of the hood, then the waist contacts the front end of the hood, the elbow contacts the hood, and then the shoulder and chest rotate downward around the hood, and the pedestrian falls and hits the hood. When the BLEH is high, the waist of the pedestrian directly collides with the front end of the hood, and then the elbow first contacts the front edge of the hood, while the lower part of the chest contacts the front end of the hood, and then the shoulder rotates downward around the hood and hits the hood. It can be seen that since the eighth thoracic vertebra of the human body is equivalent to the center of the thorax, no matter what the situation is, the eighth thoracic vertebra will generally contact the vehicle first when the chest collides, so the first marking point, the second marking point and the third marking point are set at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra, respectively, so as to collect the displacement data, velocity data, etc. corresponding to these three marking points during the simulation process.
[0032] In one possible implementation, after respectively setting the first marking point, the second marking point and the third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model, the method further comprises: Sensors are defined at the first marking point, the second marking point and the third marking point respectively, and a speed history curve of the sensor is output.
[0033] In the embodiment of the present specification, a sensor is defined at each of the three marking points, and the speed data of the point is acquired through the defined sensor, thereby continuously outputting the speed history curve of the sensor.
[0034] S103. For the simulation process of the collision simulation model under any combination of front-end styling parameters, determine the initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determine the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment, and determine the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment.
[0035] In the embodiment of the present specification, the launch conditions of the pedestrian chest impactor mainly include three conditions: speed, speed direction, and launch angle. Any front-end modeling parameter combination will be selected to start the simulation process of the collision simulation model, and the moment when the pedestrian's chest just touches the vehicle will be recorded as the initial moment of the chest collision during the simulation process. Then, the first speed information of the second marking point at the initial moment will be obtained. The first speed information may include the speed, speed direction, etc. of the position of the marking point. The second speed information of the pedestrian chest impactor can be set according to the first speed information. Similarly, the positions of the first marking point and the third marking point at the initial moment will be determined, and the projection angle of the line connecting the two in the horizontal plane direction will be calculated, so as to set the launch angle of the pedestrian chest impactor. In this way, the launch conditions of the pedestrian chest impactor under a combination of front-end modeling parameters are obtained.
[0036] In one possible implementation, the first speed information includes the collision speed of the pedestrian human body model relative to the vehicle model, and the second speed information includes the launch speed and speed angle of the pedestrian chest impactor; The determining the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment includes: Based on the speed history curve, the collision speed of the second marking point at the initial moment is determined, the collision speed is set as the launch speed of the pedestrian chest impactor, and the angle between the speed direction of the launch speed and the horizontal plane is set as the speed angle of the pedestrian chest impactor.
[0037] In an embodiment of the present specification, the collision speed of the second marking point at the initial moment is determined based on the speed history curve of the second marking point. The collision speed is the relative speed of the pedestrian body model with respect to the vehicle model, which can be represented as a vector with direction. The collision speed obtained by the test is the launch speed of the pedestrian chest impactor. At the same time, the angle between the speed direction of the launch speed and the horizontal plane is the speed angle of the launch impactor.
[0038] In one possible implementation, the determining of the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment includes: The first marking point and the third marking point at the initial moment are connected, the horizontal plane projection angle of the connecting line is determined, the difference between the right angle and the horizontal plane projection angle is calculated, and the launch angle of the pedestrian chest impactor is obtained.
[0039] In the embodiments of this specification, in addition to the speed angle used to describe the speed direction at any time, the launch conditions also need to set a fixed angle corresponding to the launch time, that is, the launch angle. The cloud server connects the first mark point and the third mark point at the initial time, determines the horizontal plane projection angle of the line connecting the two, and the difference between the right angle and the angle is the launch angle.
[0040] S104, after traversing the simulation process under all front-end modeling parameter combinations, fitting is performed on each of the second speed information, the launch angle and the front-end modeling parameter combination to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0041] In the embodiment of the present specification, after traversing the simulation process of all front-end styling parameter combinations, the second speed information and launch angle of all front-end styling parameter combinations within the front-end styling parameter range can be obtained. By fitting these data, a fitting curve graph can be generated, which can characterize the launch speed, launch angle, and speed angle that the pedestrian chest impactor should set under different vehicle models, that is, different front-end styling parameter combinations. Therefore, when actually conducting simulation tests under complex conditions where a pedestrian chest impactor needs to be set on the human body, it is only necessary to search for corresponding data in the fitting curve graph according to the simulated vehicle model to determine the specific values that need to be set in the launch conditions, and the launch conditions of the pedestrian chest impactor can be set efficiently and accurately to ensure that the launch impactor can reproduce the movement response of the chest when the vehicle collides with the pedestrian.
[0042] In one possible implementation, the fitting of each combination of the second speed information, the launch angle and the front end modeling parameter to obtain a fitting curve graph for setting the launch conditions of the pedestrian chest impactor includes: receiving a setting instruction for each of the second speed information and the launch angle, and determining setting information set to a fixed value and a front end modeling parameter interval corresponding to the setting information; The second speed information, launch angle and front-end styling parameter combinations corresponding to the non-front-end styling parameter interval are fitted, and the setting information and the front-end styling parameter interval are combined to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0043] In the embodiment of the present specification, by actually performing simulation tests on collision simulation models of different types of vehicles, it can be found that when BLEH or BA reaches a certain value, the first speed information or the emission angle will approach a fixed value. For example, when BLEH is greater than 1000mm or BA is greater than 40 degrees, the emission speed approaches 11.11m / s. When BLEH is greater than 1200mm or BA is greater than 60 degrees, the speed angle approaches 0 degrees. When BLEH is greater than 1200mm or BA is greater than 60 degrees, the emission angle approaches 90 degrees, so the data that meets the above range can be directly set to a fixed value to improve the efficiency of curve fitting. Specifically, the cloud server will display the second speed information and emission angle obtained from the test, and the staff can judge the critical point where the data tends to be stable, and then determine the front-end styling parameter interval directly set according to the fixed value, and the setting information corresponding to the front-end styling parameter interval. Then, the corresponding data of the non-front-end styling parameter interval is fitted, and combined with the setting information corresponding to the front-end styling parameter interval, a complete fitting curve diagram can be obtained.
[0044] In one embodiment, the method further comprises: The target front-end styling parameters of the actual vehicle are obtained, and the fitting curve diagram is queried based on the target front-end styling parameters to obtain the firing conditions of the pedestrian chest impactor during the simulation process.
[0045] In the embodiment of this specification, when simulating complex situations, the model of the actual vehicle is first determined to determine the target front-end shape parameters corresponding to the actual vehicle. According to the target front-end shape parameters, the corresponding second speed information and the launch angle can be queried in the fitting curve diagram, and then the launch conditions of the pedestrian chest impactor can be set.
[0046] The following will be combined with the attached Figure 3 , the test device for the launch conditions of the pedestrian chest impactor provided in the embodiment of the present application is introduced in detail. It should be noted that the attached Figure 3 The test device for the launch condition of the pedestrian chest impactor shown in the present application is used to perform Figure 1 For the convenience of explanation, only the part related to the embodiment of the present application is shown. For the specific technical details not disclosed, please refer to the present application. Figure 1 The embodiment shown.
[0047] See also Figure 3 , Figure 3 Schematic diagram of the structure of a test device for the firing conditions of a pedestrian chest impactor provided in an embodiment of the present application. Figure 3 As shown, the device comprises: A construction module 301 is used to construct a vehicle model with adjustable front-end styling parameters, and to construct a collision simulation model according to the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A setting module 302 is used to set a first marking point, a second marking point and a third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model respectively; A determination module 303 is used to determine the initial moment when the chest area of the pedestrian human body model just contacts the vehicle model for the simulation process of the collision simulation model under any combination of front-end styling parameters, determine the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment, and determine the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment; The fitting module 304 is used to fit each of the second speed information, the launch angle and the front-end modeling parameter combination after traversing the simulation process under all the front-end modeling parameter combinations, and obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0048] In one possible implementation, the construction module 301 is specifically used for: Acquire the external dimension data of different types of vehicles, determine the external dimension profile of a median vehicle of the external dimension data, and calculate the front-end modeling parameters of the external dimension profile of the median vehicle; The front-end styling parameters are summarized, a range of the front-end styling parameters is determined, and a vehicle model with adjustable front-end styling parameters is constructed based on the range of the front-end styling parameters.
[0049] In one possible implementation, the setting module 302 is further configured to: Sensors are defined at the first marking point, the second marking point and the third marking point respectively, and a speed history curve of the sensor is output.
[0050] In one possible implementation, the first speed information includes the collision speed of the pedestrian human body model relative to the vehicle model, and the second speed information includes the launch speed and speed angle of the pedestrian chest impactor; The determination module 303 is specifically used for: Based on the speed history curve, the collision speed of the second marking point at the initial moment is determined, the collision speed is set as the launch speed of the pedestrian chest impactor, and the angle between the speed direction of the launch speed and the horizontal plane is set as the speed angle of the pedestrian chest impactor.
[0051] In one possible implementation, the determination module 303 is further configured to: The first marking point and the third marking point at the initial moment are connected, the horizontal plane projection angle of the connecting line is determined, the difference between the right angle and the horizontal plane projection angle is calculated, and the launch angle of the pedestrian chest impactor is obtained.
[0052] In one possible implementation, the fitting module 304 is specifically configured to: receiving a setting instruction for each of the second speed information and the launch angle, and determining setting information set to a fixed value and a front end modeling parameter interval corresponding to the setting information; The second speed information, launch angle and front-end styling parameter combinations corresponding to the non-front-end styling parameter interval are fitted, and the setting information and the front-end styling parameter interval are combined to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0053] In one embodiment, the device further comprises: The query module is used to obtain the target front-end styling parameters of the actual vehicle, query the fitting curve diagram based on the target front-end styling parameters, and obtain the firing conditions of the pedestrian chest impactor during the simulation process.
[0054] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. The "unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.
[0055] Each processing unit and / or module of the embodiments of the present application may be implemented by an analog circuit that implements the functions described in the embodiments of the present application, or may be implemented by software that executes the functions described in the embodiments of the present application.
[0056] See also Figure 4 , which shows a schematic diagram of the structure of an electronic device involved in an embodiment of the present application, the electronic device can be used to implement Figure 1 The method in the embodiment shown. Figure 4 As shown, the electronic device 400 may include: at least one processor 401 , at least one network interface 404 , a user interface 403 , a memory 405 , and at least one communication bus 402 .
[0057] The communication bus 402 is used to realize the connection and communication between these components.
[0058] The user interface 403 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 403 may also include a standard wired interface and a wireless interface.
[0059] The network interface 404 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
[0060] Among them, the processor 401 may include one or more processing cores. The processor 401 uses various interfaces and lines to connect various parts of the entire electronic device 400, and executes various functions and processes data of the electronic device 400 by running or executing instructions, programs, code sets or instruction sets stored in the memory 405, and calling data stored in the memory 405. Optionally, the processor 401 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 401 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics central processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 401, and it can be implemented separately through a chip.
[0061] Among them, the memory 405 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 405 includes a non-transitory computer-readable storage medium. The memory 405 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 405 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 405 may also be optionally at least one storage device located away from the aforementioned processor 401. As Figure 4 As shown, the memory 405 as a computer storage medium may include an operating system, a network communication module, a user interface module, and program instructions.
[0062] exist Figure 4 In the electronic device 400 shown, the user interface 403 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 401 can be used to call the test application program of the launch condition of the pedestrian chest impactor stored in the memory 405, and specifically perform the following operations: Constructing a vehicle model with adjustable front-end styling parameters, and constructing a collision simulation model based on the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A first marking point, a second marking point and a third marking point are respectively set at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model; For the simulation process of the collision simulation model under any combination of front-end styling parameters, determine the initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determine the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment, and determine the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment; After traversing the simulation process under all front-end modeling parameter combinations, each of the second speed information, the launch angle and the front-end modeling parameter combination is fitted to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
[0063] The present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.
[0064] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.
[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0066] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.
[0067] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0068] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0069] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.
[0070] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by entering a program to instruct related hardware, and the program may be stored in a computer-readable memory, which may include a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.
[0071] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.
Claims
1. A method for testing the firing conditions of a pedestrian chest impactor, characterized in that: The method comprises: Constructing a vehicle model with adjustable front-end styling parameters, and constructing a collision simulation model based on the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A first marking point, a second marking point and a third marking point are respectively set at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model; For the simulation process of the collision simulation model under any combination of front-end styling parameters, determine the initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determine the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment, and determine the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment; After traversing the simulation process under all front-end modeling parameter combinations, each of the second speed information, the launch angle and the front-end modeling parameter combination is fitted to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
2. The method according to claim 1, characterized in that The method of constructing a vehicle model with adjustable front-end styling parameters comprises: Acquire the external dimension data of different types of vehicles, determine the external dimension profile of a median vehicle of the external dimension data, and calculate the front-end modeling parameters of the external dimension profile of the median vehicle; The front-end styling parameters are summarized, a range of the front-end styling parameters is determined, and a vehicle model with adjustable front-end styling parameters is constructed based on the range of the front-end styling parameters.
3. The method according to claim 1, characterized in that: After the first marking point, the second marking point and the third marking point are respectively set at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model, the method further includes: Sensors are defined at the first marking point, the second marking point and the third marking point respectively, and a speed history curve of the sensor is output.
4. The method according to claim 3, characterized in that The first speed information includes the collision speed of the pedestrian human body model relative to the vehicle model, and the second speed information includes the launch speed and speed angle of the pedestrian chest impactor; The determining the second speed information of the pedestrian chest impactor based on the first speed information of the second marking point at the initial moment includes: Based on the speed history curve, the collision speed of the second marking point at the initial moment is determined, the collision speed is set as the launch speed of the pedestrian chest impactor, and the angle between the speed direction of the launch speed and the horizontal plane is set as the speed angle of the pedestrian chest impactor.
5. The method according to claim 1, characterized in that The determining of the launch angle of the pedestrian chest impactor based on the horizontal plane projection angle of the line connecting the first marking point and the third marking point at the initial moment includes: The first marking point and the third marking point at the initial moment are connected, the horizontal plane projection angle of the connecting line is determined, the difference between the right angle and the horizontal plane projection angle is calculated, and the launch angle of the pedestrian chest impactor is obtained.
6. The method according to claim 1, characterized in that The fitting of each combination of the second speed information, the launch angle and the front end modeling parameter to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor includes: receiving a setting instruction for each of the second speed information and the launch angle, and determining setting information set to a fixed value and a front end modeling parameter interval corresponding to the setting information; The second speed information, launch angle and front-end styling parameter combinations corresponding to the non-front-end styling parameter interval are fitted, and the setting information and the front-end styling parameter interval are combined to obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
7. The method according to claim 1, characterized in that The method further comprises: The target front-end styling parameters of the actual vehicle are obtained, and the fitting curve diagram is queried based on the target front-end styling parameters to obtain the firing conditions of the pedestrian chest impactor during the simulation process.
8. A test device for the firing conditions of a pedestrian chest impactor, characterized in that: The device comprises: A construction module, used to construct a vehicle model with adjustable front-end styling parameters, and to construct a collision simulation model according to the vehicle model and a pedestrian human body model, wherein the front-end styling parameters include a hood front edge height and a hood angle; A setting module, used for setting a first marking point, a second marking point and a third marking point at the midpoint of the first thoracic vertebra, the midpoint of the eighth thoracic vertebra and the midpoint of the twelfth thoracic vertebra of the pedestrian human body model respectively; A determination module, for determining, for the simulation process of the collision simulation model under any combination of front-end styling parameters, an initial moment when the chest area of the pedestrian human body model just contacts the vehicle model, determining second speed information of the pedestrian chest impactor based on first speed information of the second marking point at the initial moment, and determining a launch angle of the pedestrian chest impactor based on a horizontal plane projection angle of a line connecting the first marking point and the third marking point at the initial moment; The fitting module is used to fit each of the second speed information, the launch angle and the front-end modeling parameter combination after traversing the simulation process under all front-end modeling parameter combinations, and obtain a fitting curve diagram for setting the launch conditions of the pedestrian chest impactor.
9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.
10. A computer-readable storage medium having a computer program stored thereon, wherein the computer-readable storage medium has instructions stored therein, and when the instructions are executed on a computer or a processor, the computer or the processor executes the steps of the method according to any one of claims 1 to 7.