Design method of simulation guardrail for intelligent driving test and simulation guardrail

Abstract

The invention discloses a design method of a simulation guardrail for an intelligent driving test, the simulation guardrail, a computing device and a computer readable storage medium, and the method comprises the steps: comparing the size design data of the simulation guardrail with preset size information, and determining the target size information and structure connection information of the simulation guardrail; detecting physical attributes based on the sample of the simulation guardrail, and determining target material information of the simulation guardrail; and according to the size parameter information, the structure connection information and the material selection information, determining design data for manufacturing the simulation guardrail. Thus, the size design is performed by referring to the preset size, the sample test is performed, and the required size parameter information, the structure connection information and the material selection information are determined to be used for manufacturing the simulation guardrail, so that the manufactured simulation guardrail can meet the setting requirements of road characteristics; and more accurate and reliable test conditions are provided for intelligent driving test.

Description

Technical Field

[0001] The present application relates to the technical field of guardrail design, and in particular to a design method and a simulated guardrail for intelligent driving testing. Background Art

[0002] With the continuous advancement of vehicle active safety technology, vehicles equipped with advanced autonomous driving functions are gradually expanding their application scope. In the test phase of intelligent driving, the active safety performance of vehicles is generally evaluated based on reference objects. Here, the reference objects selected can truly reflect the physical properties of road obstacles and provide testers with a safe and realistic test environment.

[0003] However, the research and development of reference objects for intelligent driving tests in my country is still in its infancy. Due to differences in road environment and other aspects, the accuracy and reliability of the final test cannot fully meet the current testing status. Summary of the invention

[0004] The purpose of this application is to provide a design method, a simulated guardrail, a computing device and a computer-readable storage medium for a simulated guardrail for intelligent driving testing, which can design a simulated guardrail that meets the setting requirements of road characteristics and provide more accurate and reliable test conditions for intelligent driving testing.

[0005] To achieve the above objectives: In a first aspect, an embodiment of the present application provides a method for designing a simulated guardrail for intelligent driving testing, comprising: Comparing the size design data of the simulated guardrail with the preset size information to determine the target size information and structural connection information of the simulated guardrail; Performing physical property testing on a sample of the simulated guardrail to determine target material information of the simulated guardrail; The design data for making the simulated guardrail is determined based on the size parameter information, the structural connection information and the material selection information.

[0006] In one embodiment, comparing the size design data of the simulated guardrail with preset size information to determine the target size information of the simulated guardrail includes: Compare the dimension design data of the simulated guardrail with the preset dimension information to obtain corresponding difference parameters; If the difference parameter is less than or equal to a preset difference threshold, the size information is determined as the target size information of the simulated guardrail; The structural connection information of the simulated guardrail is determined according to the target size information.

[0007] In one embodiment, the detecting of physical properties of the sample of the simulated guardrail to determine target material information of the simulated guardrail includes: Testing the physical properties of guardrail samples made of different materials to determine whether the physical properties of the guardrail samples meet the property standards; If it meets the requirements, the target material information is determined according to the production material.

[0008] In one implementation, the attribute standard is determined by: Testing the physical properties of the physical guardrail, including radar reflection properties and infrared characteristics; Based on testing the radar reflection property of the physical guardrail, a first property standard is obtained; and based on testing the infrared property of the physical guardrail, a second property standard is obtained; According to the first attribute standard and the second attribute standard, an attribute standard for detecting the simulated guardrail is determined.

[0009] In one embodiment, the physical properties of the guardrail samples made of different materials are tested to determine whether the physical properties of the guardrail samples meet the property standards, including: Testing the radar reflection property of the guardrail sample, obtaining a first test result, comparing the first test result with the first property standard, and determining whether the radar reflection property of the guardrail sample meets the property standard; and / or, Perform an infrared property test on the guardrail sample, obtain a second test result obtained by the test, compare the second test result with the second attribute standard, and determine whether the infrared property of the guardrail sample meets the attribute standard.

[0010] In one embodiment, comparing the first test result with the first attribute standard to determine whether the radar reflection attribute of the guardrail sample meets the attribute standard includes: Compare the difference between the first test result and the peak value of the radar cross section at the target angle in the first attribute standard; If the difference is within a preset range, it is determined that the radar reflection property of the guardrail sample meets the property standard; And / or, comparing the second test result with the second attribute standard to determine whether the infrared characteristics of the guardrail sample meet the attribute standard, including: Determining the reflectivity interval corresponding to each angle in the second attribute standard; Obtaining reflectivity at at least two angles in the second test result; If the reflectivity is within the reflectivity range corresponding to the angle, it is determined that the infrared characteristics of the guardrail sample meet the attribute standards.

[0011] In a second aspect, an embodiment of the present application provides a simulated guardrail for intelligent driving testing, which is manufactured using the design data obtained in the first aspect.

[0012] In one embodiment, the simulated guardrail includes a sleeve, a magnet, a column, a base, and a corrugated beam. The sleeve is connected to the bottom of the supporting pipe column inside the column, and the magnet is embedded in the sleeve to fix the column to the base through the magnet; the corrugated beam is connected between adjacent columns.

[0013] In a third aspect, an embodiment of the present application provides a computing device, specifically comprising: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to execute the method as described in the first aspect.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the instructions in the computer-readable storage medium are executed by a processor of a computing device, the computing device is enabled to implement the method described in the first aspect.

[0015] The embodiments of the present application provide a design method, a simulated guardrail, a computing device, and a computer-readable storage medium for a simulated guardrail for intelligent driving testing, including: comparing the dimension design data of the simulated guardrail with the preset dimension information to determine the target dimension information and structural connection information of the simulated guardrail; performing physical property detection based on a sample of the simulated guardrail to determine the target material information of the simulated guardrail; and determining the design data for making the simulated guardrail based on the dimension parameter information, the structural connection information, and the material selection information. In this way, by referring to the preset dimensions for dimension design and performing sample testing to determine the required dimension parameter information, structural connection information, and material selection information for making a simulated guardrail, the manufactured simulated guardrail can meet the setting requirements of the road characteristics, providing more accurate and reliable test conditions for intelligent driving testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a flow chart of a method for designing a simulated guardrail for intelligent driving testing provided by an embodiment of the present invention; Figure 2 A schematic diagram of a specific process of a method for designing a simulated guardrail for intelligent driving testing provided by an embodiment of the present invention; Figure 3 A schematic diagram of a process for performing physical property testing on a physical guardrail provided in an embodiment of the present invention; Figure 4 Schematic diagram of test results of radar reflection properties of a physical guardrail provided in an embodiment of the present invention Figure 1 ; Figure 5 Schematic diagram of test results of radar reflection properties of a physical guardrail provided in an embodiment of the present invention Figure 2 ; Figure 6 A schematic diagram of infrared specific test results of a physical guardrail provided in an embodiment of the present invention; Figure 7 A schematic diagram of a simulated guardrail for intelligent driving testing provided by an embodiment of the present invention; Figure 8 A schematic diagram of the specific structure of a simulated guardrail for intelligent driving testing provided by an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of a computing device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0018] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0019] It should be understood that, although the terms first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of..." or "when..." or "in response to determination". Furthermore, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising", "including" indicate that there are described features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, “A, B, or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A, B, and C.” An exception to this definition will occur only when a combination of elements, functions, steps, or operations are inherently mutually exclusive in some manner.

[0020] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0021] It should be noted that, in this article, step codes such as S101, S102, etc. are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the sequence. When implementing the step, those skilled in the art may execute S102 first and then S101, etc., but these should all be within the scope of protection of this application.

[0022] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0024] See also Figure 1 The embodiment of the present application provides a design method for a simulated guardrail for intelligent driving test. The design method for a simulated guardrail for intelligent driving test can be implemented in software and / or hardware. In this embodiment, the design method for a simulated guardrail for intelligent driving test is applied to a computing device as an example. The design method for a simulated guardrail for intelligent driving test provided in this embodiment includes: Step S101: Compare the size design data of the simulated guardrail with the preset size information to determine the target size information and structural connection information of the simulated guardrail.

[0025] In one embodiment, the size design data of the simulated guardrail is compared with the preset size information to determine the target size information of the simulated guardrail, including: Compare the size design data of the simulated guardrail with the preset size information to obtain the corresponding difference parameters; If the difference parameter is less than or equal to the preset difference threshold, the size information is determined as the target size information of the simulated guardrail; The structural connection information of the simulated guardrail is determined according to the target size information.

[0026] Among them, the preset size information can be based on the data information of the domestic three-corrugated beam steel guardrail as a reference standard. Specifically, according to the national standard "Highway Three-Corrugated Beam Steel Guardrail", the parameter design of the domestic three-corrugated beam steel guardrail has the following requirements: the three-corrugated beam steel guardrail is composed of three-corrugated beam plates, columns, barrier blocks, three-corrugated beam pads, end caps and other components. Among them, the height of the column above the ground is set to 890mm, the end cap width is set to 193mm, the end cap length is set to 380mm, the width of the three-corrugated beam plate is set to 504mm, and the length of a single beam plate is set to 2m, etc. Alternatively, the size parameters can be set as a reference standard based on the actual test needs of the user for intelligent driving tests. It can be understood that according to the type and shape of the simulated guardrail to be designed, it is not limited to using the data information of the three-corrugated beam steel guardrail as a reference standard.

[0027] Taking into account the various complex road conditions and emergencies that may occur in intelligent driving tests, such as vehicle loss of control, emergency obstacle avoidance, etc., simulated guardrails are set up to simulate the guardrail response in these extreme situations, so as to more accurately evaluate the test results of intelligent driving tests. At the same time, by setting up simulated guardrails instead of physical guardrails for intelligent driving tests in road scenarios, not only the basic functions of physical guardrails are retained, but also the risk of injury in collision tests is significantly reduced.

[0028] The dimension design data of the simulated guardrail includes basic dimension information such as the height, length, and width of the guardrail, as well as key dimension information such as the curvature and cross-sectional shape of the corrugated steel beam of the guardrail. Here, the dimension design data of the simulated guardrail can be directly obtained from the three-dimensional drawing of the simulated design.

[0029] Optionally, when comparing the basic dimension information of the simulated guardrail with the preset dimension information, the difference parameters between the basic dimension information such as height, length, width of the simulated guardrail and the corresponding height, length, width and other parameters in the preset dimension information are determined respectively. When comparing the key dimension information of the simulated guardrail with the preset dimension information, the key dimension information such as the curvature and cross-sectional shape of the corrugated steel beam of the simulated guardrail is compared with the difference parameters between the curvature and cross-sectional shape of the corrugated steel beam in the preset dimension information.

[0030] Here, the difference parameter can be expressed in the form of a difference value or a difference ratio. If the difference parameter is less than or equal to a preset difference threshold, the size design data of the current simulated guardrail is determined as the target size information; if the difference parameter is greater than the preset difference threshold, the size design data of the simulated guardrail is further adjusted based on the preset size information.

[0031] Here, the compared dimensional design data is different, and the corresponding difference parameters obtained by the comparison are also different. If there is a difference parameter greater than the preset difference threshold, the dimensional design data corresponding to the difference parameter greater than the preset difference threshold is adjusted accordingly. Here, when calculating the difference parameter, it can be specifically determined by comparing the difference data between each dimensional information with the corresponding dimensional parameter, which is expressed by the formula: difference parameter = difference data / dimensional parameter.

[0032] Exemplarily, the preset difference threshold is determined to be set to 2%, and the length of the simulated guardrail is compared with the length data in the preset size information to obtain the difference parameter a. If a is less than or equal to 2%, it is determined that the length of the current simulated guardrail meets the size requirement, and the length of the current simulated guardrail is used as the length in the target size information. If a is greater than 2%, the length of the simulated guardrail is adjusted based on the preset size information. Specifically, if the length of the simulated guardrail is too long, the length is adjusted to be shorter to be closer to the preset size information; if the length of the simulated guardrail is too short, the length is adjusted to be closer to the preset size information.

[0033] Optionally, when comparing key dimensional information such as the curvature and cross-sectional shape of the corrugated beam steel of the simulated guardrail with the preset dimensional information, the similarity between the simulated guardrail and the preset dimensional information can be determined based on the front view and cross-sectional view of the simulated guardrail.

[0034] Here, the overall outline and detailed features of the simulated guardrail are determined by the front view, and the internal structure and cross-sectional shape of the simulated guardrail are determined by the cross-sectional view. In this way, the front view and cross-sectional view of the simulated guardrail are superimposed and compared with the corresponding views of the preset size information to evaluate the similarity or difference parameters between the two. Specifically, the ratio of the matching area to the area in the preset size information can be used as a calculation method for the similarity, that is, the area of ​​the overlapping part of the simulated guardrail and the front view and cross-sectional view in the preset size information (i.e., the matching area) is divided by the total area on the corresponding view in the preset size information, and the result is the similarity, and the difference parameter is further determined based on the obtained similarity.

[0035] Optionally, after determining the target dimension information of the simulated guardrail, the overall shape of the simulated guardrail can be determined based on the determined dimensions, size and shape, etc., and the connection information between the various components in the simulated guardrail can be further designed.

[0036] In this way, by comparing the dimensional design data of the simulated guardrail with the preset dimensional information one by one, it helps to ensure that the simulated guardrail to be developed is highly consistent with the real guardrails on both sides of the road in shape and size, thereby meeting the needs of actual testing.

[0037] Step S102: Detecting the physical properties of the simulated guardrail sample to determine target material information of the simulated guardrail.

[0038] Optionally, based on the determined target size information and structural connection information of the simulated guardrail, a plurality of samples of the simulated guardrail are correspondingly manufactured. Here, when a plurality of samples of the simulated guardrail are manufactured, different simulated guardrails are manufactured using different materials.

[0039] Here, when determining the materials for making each simulated guardrail sample, considering the quality and collision resistance design of the simulated guardrail, ethylene-vinyl acetate copolymer (EVA) material can be used as the guardrail body, and the surface is wrapped with polycarbonate film and galvanized. Here, EVA is made of ethylene and vinyl acetate copolymer, has a good feel, strong elasticity, bending resistance and can withstand large load impact. As a preferred choice, a density of 45kg / m 3 EVA material, the mass of the main part can be preliminarily calculated based on the size.

[0040] In one embodiment, the physical property of the simulated guardrail sample is detected to determine the target material information of the simulated guardrail, including: Testing the physical properties of guardrail samples made of different materials to determine whether the physical properties of the guardrail samples meet the property standards; If it meets the requirements, the target material information is determined based on the production material.

[0041] Optionally, when testing the physical properties of samples of simulated guardrails made of different materials, if there are guardrail samples made of multiple materials that meet the attribute standards, the manufacturing material corresponding to the sample closest to the attribute standard can be determined as the target material information. Alternatively, based on user selection, the target material information can be determined by selecting one of the manufacturing materials that meet the attribute standards taking into account test results, material acquisition cost, difficulty, etc.

[0042] In one embodiment, the attribute standard is determined by: Testing the physical properties of the physical guardrail, including radar reflection properties and infrared characteristics; Based on testing the radar reflection property of the physical guardrail, a first property standard is obtained; and based on testing the infrared property of the physical guardrail, a second property standard is obtained; According to the first attribute standard and the second attribute standard, the attribute standard for detecting the simulated guardrail is determined.

[0043] Optionally, when testing the radar reflection property of the physical guardrail, the radar cross-section (RCS) corresponding to each angle in the horizontal direction of the physical guardrail and the radar cross-section corresponding to each angle in the vertical direction during the test are recorded and determined as the first attribute standard. Here, the first attribute standard is determined as the attribute standard for testing the radar reflection property of the simulated guardrail.

[0044] Optionally, when testing the infrared characteristics of the physical guardrail, the upper and lower limits of the reflectivity corresponding to different wavelengths at different measuring angles during the test are recorded and determined as the second attribute standard. Here, the second attribute standard is determined as the attribute standard for infrared characteristic detection of the simulated guardrail.

[0045] In one embodiment, the physical properties of guardrail samples made of different materials are tested to determine whether the physical properties of the guardrail samples meet the property standards, including: Testing the radar reflection property of the guardrail sample, obtaining a first test result, comparing the first test result with the first property standard, and determining whether the radar reflection property of the guardrail sample meets the property standard; and / or, Perform an infrared characteristic test on the guardrail sample, obtain a second test result obtained by the test, compare the second test result with the second attribute standard, and determine whether the infrared characteristic of the guardrail sample meets the attribute standard.

[0046] Optionally, when the radar reflection property test and the infrared characteristic test are respectively performed on the guardrail sample, the first test result of the radar reflection property and the second test result of the infrared characteristic test can be obtained in the same manner as when the physical guardrail is tested. In this way, the first test result is compared with the first attribute standard to determine whether the radar reflection property of the guardrail sample meets the attribute standard; the second test result is compared with the second attribute standard to determine whether the infrared characteristic of the guardrail sample meets the attribute standard.

[0047] In one embodiment, comparing the first test result with the first attribute standard to determine whether the radar reflection attribute of the guardrail sample meets the attribute standard includes: Compare the difference between the first test result and the peak value of the radar cross section at the target angle in the first attribute standard; If the difference is within the preset range, it is determined that the radar reflection property of the guardrail sample meets the property standard; and / or, comparing the second test result with the second attribute standard to determine whether the infrared characteristics of the guardrail sample meet the attribute standard, including: Determine the reflectivity interval corresponding to each angle in the second attribute standard; Obtaining reflectivity at at least two angles in the second test result; If the reflectivity is within the reflectivity range corresponding to the angle, it is determined that the infrared characteristics of the guardrail sample meet the attribute standards.

[0048] Optionally, when performing a radar reflection test on a guardrail sample, the echo signal and the corresponding RCS peak value at different angles are recorded and determined as a first test result. In the first test result, the RCS peak value at the target angle is determined, and the target angle can be adjusted based on actual comparison requirements. The first test result is compared with the RCS value at the target angle in the first attribute standard. If the RCS peak value of the guardrail sample at the target angle determined in the first test result is within a preset range compared with the first attribute standard, it is determined that the radar attribute of the guardrail sample meets the attribute standard. If it is not within the preset range, it means that the current manufacturing material does not meet the attribute standard.

[0049] Exemplarily, if the target angle is determined to be 70°, the first test result is compared with the RCS peak of about 70° in the first attribute standard. If the peak difference is within 5%, it is considered to meet the attribute standard.

[0050] Optionally, when the guardrail sample is subjected to infrared testing, the reflectivity at different angles is recorded and determined as the second test result. In the second test result, if the reflectivity at at least two angles is within the reflectivity interval corresponding to the angle, then it is determined that the infrared reflection property of the guardrail sample meets the requirements. In this way, based on the comparison of the reflectivity interval of the physical guardrail, the reflection characteristics of the guardrail sample at different angles are taken into account, and the actual performance of the physical guardrail is also combined, which can more comprehensively evaluate the performance of the guardrail sample and help improve the reliability and accuracy of the manufactured simulated guardrail.

[0051] Step S103: Determine design data for making a simulated guardrail according to the size parameter information, the structural connection information and the material selection information.

[0052] Optionally, a simulated guardrail is manufactured based on the determined size parameter information, structural connection information and material selection information, which can be applied to active safety performance tests in various scenarios, including but not limited to the testing of auxiliary driving systems such as AEB\LKA\LDW.

[0053] In summary, in the design method of the simulated guardrail for intelligent driving test provided by the above embodiment, the size design is carried out by referring to the preset size, and the sample test is carried out to determine the required size parameter information, structural connection information and material selection information for making the simulated guardrail. The manufactured simulated guardrail can meet the setting requirements of the road characteristics and provide more accurate and reliable test conditions for the intelligent driving test.

[0054] Based on the same inventive concept as the above-mentioned embodiment, the design method of the simulated guardrail for intelligent driving test provided by the present application is described in detail below through a specific example, taking the physical guardrail based on domestic roads as a reference and based on the domestic three-corrugated steel guardrail, a corresponding simulated guardrail for intelligent driving test is designed and developed. Figure 2 As shown, the following process is included: Step S201, obtaining the dimension parameters of the three-wave beam steel guardrail in the national standard.

[0055] Optionally, according to the national standard "Highway Three-Corrugated Beam Steel Guardrail", the parameter design of the domestic three-corrugated beam steel guardrail has the following requirements: the three-corrugated beam steel guardrail is composed of three-corrugated beam plates, columns, barrier blocks, three-corrugated beam pads, end caps and other components. Among them, the height of the column above the ground is set to 890mm, the end cap width is set to 193mm, the end cap length is set to 380mm, the width of the three-corrugated beam plate is set to 504mm, and the length of a single beam plate is set to 2m, etc. Alternatively, the corresponding size parameters can be set as a reference standard based on the actual test needs of the user for intelligent driving testing.

[0056] Step S202: Compare the differences between the physical guardrail and the simulated guardrail.

[0057] Optionally, when comparing the basic dimension information of the simulated guardrail with the dimension information of the physical guardrail, the difference parameters between the basic dimension information such as height, length, width of the simulated guardrail and the corresponding height, length, width and other parameters in the dimension information of the physical guardrail are determined respectively. When comparing the key dimension information of the simulated guardrail with the dimension information of the physical guardrail, the difference parameters between the key dimension information such as the curvature and cross-sectional shape of the corrugated steel of the simulated guardrail and the curvature and cross-sectional shape of the corrugated steel in the dimension information of the physical guardrail are compared respectively.

[0058] Step S203: compare the differences between guardrail samples of the physical guardrail and the simulated guardrail.

[0059] Optionally, considering that errors are inevitable when making guardrail samples based on simulated guardrails, it is also necessary to compare the differences between the samples of the physical guardrail and the simulated guardrail. Here, the guardrail samples are also compared with the physical guardrail based on basic dimensional information such as height, length, and width, as well as key dimensional information such as the curvature and cross-sectional shape of the corrugated steel of the guardrail, to determine the differences between the guardrail samples of the physical guardrail and the simulated guardrail.

[0060] Step S204: determine target size information according to the difference result.

[0061] Optionally, if the difference between the physical guardrail and the simulated guardrail is less than or equal to a preset difference threshold, the size design data of the current simulated guardrail is determined as the target size information; if the difference between the physical guardrail and the simulated guardrail is greater than the preset difference threshold, the size design data of the simulated guardrail is further adjusted based on the size parameters of the physical guardrail.

[0062] Optionally, if the difference result between the physical guardrail and the simulated guardrail is less than or equal to a preset difference threshold, and the difference result between the guardrail samples of the physical guardrail and the simulated guardrail is also less than or equal to the preset difference threshold, it is determined that there is no error in the manufacturing accuracy of the current guardrail sample. If the difference result between the physical guardrail and the simulated guardrail is less than or equal to the preset difference threshold, and the difference result between the guardrail samples of the physical guardrail and the simulated guardrail is also greater than the preset difference threshold, it is determined that the manufacturing accuracy error of the current guardrail sample is large and needs to be adjusted.

[0063] Step S205: Determine the structural connection information of the simulated guardrail.

[0064] Optionally, the components constituting the simulated guardrail and the connection relationship between the components are determined based on the size information. The connection method between these components directly affects the stability, strength and aesthetics of the guardrail.

[0065] Step S206, determining guardrail samples made of different materials, including: sample A, sample B, sample C.

[0066] Optionally, considering the quality and crash resistance design of the simulated guardrail, EVA material is used as the guardrail body, and the surface is wrapped with polycarbonate film and galvanized. Here, when determining the manufacturing materials of sample A, sample B, and sample C, polyvinyl chloride films with different galvanizing densities are generally selected. For example, the manufacturing material of sample A is determined to be a polyvinyl chloride film with a 50% galvanizing density, the manufacturing material of sample B is determined to be a polyvinyl chloride film with a 70% galvanizing density, and the manufacturing material of sample C is determined to be a polyvinyl chloride film with a 90% galvanizing density.

[0067] Step S207: testing the physical properties of each sample.

[0068] Optionally, the radar reflection properties of sample A, sample B, and sample C are tested separately, and whether the infrared characteristics are consistent with the physical properties of the physical guardrail or are within the allowable difference range.

[0069] In one embodiment, before step S207, the physical properties of the physical guardrail need to be determined to serve as a comparison standard for testing the physical properties of the guardrail sample of the simulated guardrail, such as Figure 3 As shown, specifically including: Step S301: testing the physical properties of the physical guardrail.

[0070] Step S302: radar reflection property test.

[0071] Optionally, when testing the radar reflection properties of a physical guardrail, the testing tools include a 77GHZ millimeter wave radar, a filter material, a turntable, a testing software, etc. The specific operation methods include: (1) Radar center placement height: 55±5cm; (2) Placement type: The three-corrugated beam plate is placed vertically and at the center of the turntable (the horizontal center direction of the guardrail is perpendicular to the normal direction of the radar), and the millimeter wave radar is placed upright; (3) Distance between radar and guardrail center: 3m; (4) Turntable speed: Adjust to the lowest speed, it takes about 22 seconds to turn 90°; (5) The horizontal center direction of the guardrail is perpendicular to the normal direction of the radar. 2 seconds after the radar starts testing, start the turntable and rotate 90°. After 2 seconds, the radar stops working. Repeat three times; (6) When the turntable is unloaded, the radar works and records environmental data.

[0072] Note: Consider using absorbing materials to cover items such as power strips; the radar is stationary and the guardrail rotates with the turntable.

[0073] Step S303: infrared characteristic test.

[0074] Optionally, when testing the infrared characteristics of a physical guardrail, the specific operation method includes: (1) Calibrate at the center of the turntable and debug the instrument. The distance between the test object and the probe is 4.7 ± 0.2 cm; (2) Calibrate the angle scale on the turntable; (3) Place the column perpendicular to the beam, with the column plumb plane at the center of the turntable and aligned with the calibrated positions on both sides of the turntable, and conduct a 0° experiment; (4) Perform one experiment every 10°. After completing the experiment in the range of 20-70°, it is counted as one set of experiments. (5) Change different measurement points and repeat 5 sets of experiments.

[0075] Step S304: record the test results of the physical properties.

[0076] Optionally, when testing the radar reflection properties of a solid guardrail, such as Figure 4 As shown in the figure, the RCS peak values ​​corresponding to each angle of the physical guardrail in the horizontal direction during the test are recorded, as well as Figure 5 The RCS peak values ​​corresponding to various angles in the vertical direction are shown.

[0077] Optionally, when testing the infrared characteristics of a physical guardrail, such as Figure 6As shown, the upper and lower limits of the reflectivity corresponding to different wavelengths at different measurement angles during the test are recorded, and the reflectivity range is determined based on the upper and lower limits. Figure 6 The upper curve in each graph represents the upper limit, and the lower curve in each graph represents the lower limit.

[0078] Step S208, determine whether the physical properties of each sample meet the property standards, if so, execute step A210; if not, execute step A209.

[0079] Optionally, when detecting and judging the radar reflection properties of each sample, sample A, sample B, and sample C can be compared with the RCS peak at an angle of about 70° when testing the radar reflection properties of the physical guardrail. If the peak difference between the two is within 5%, it is considered to be in compliance.

[0080] Optionally, when detecting and judging the infrared characteristics of each sample, sample A, sample B, and sample C can be compared respectively. In the test of infrared characteristics, the reflectivity tested at different angles is determined to be within the area between the upper limit and the lower limit obtained in the test of the infrared characteristics of the physical guardrail. If so, it is considered to be compliant.

[0081] Step S209: reselect production materials.

[0082] Step S210: determine the design data and produce the finished product.

[0083] In summary, in the design method of the simulated guardrail for intelligent driving test provided in the above embodiment, by determining the required size parameter information, structural connection information and material selection information to produce the corresponding simulated guardrail, it is possible to meet the setting requirements of road characteristics and provide more accurate and reliable test conditions for intelligent driving test.

[0084] Based on the same inventive concept as the above embodiments, refer to Figure 7 The present application provides a simulated guardrail for intelligent driving testing, which is manufactured using the design data obtained above.

[0085] like Figure 8 As shown, the simulated guardrail includes a sleeve, a magnet, a column, a base, and a corrugated beam. The sleeve is connected to the bottom of the supporting pipe column inside the column, and the magnet is embedded in the sleeve to fix the column to the base through the magnet; the corrugated beam is connected between adjacent columns.

[0086] Optionally, the components of the simulated guardrail include a sleeve, a magnet, a column, a base, a corrugated beam, etc. Here, the sleeve is a key component connecting the support column inside the column, and can be tightly sleeved on the outside of the support column to form a stable connection. Through the connection of the sleeve, one end of the support column is fixed inside the column. The column is also provided with an upper support, so that the end of the support column opposite to the sleeve is fixed inside the column based on the upper support.

[0087] Here, the corrugated beam is connected to the column by Velcro. Here, Velcro has a unique hook and loop design, which is not only convenient and fast, but also can be disassembled and adjusted at any time as needed, which improves the flexibility and practicality of the guardrail.

[0088] Among them, the columns and corrugated beams are generally made of EVA material, and the surface is wrapped with polycarbonate film and galvanized. Here, EVA material is made of ethylene and vinyl acetate copolymer, has good hand feel, strong elasticity, bending resistance and can withstand large load impact.

[0089] Here, the magnet is embedded in the sleeve, and by setting the magnet and fixing the iron block in the groove of the base with bolts, the column can be adsorbed on the base to connect the column with the base to prevent it from shaking or tilting during use. In this way, connecting the column with the base through the magnet not only improves the reliability of the connection, but also simplifies the installation process, making the connection between the column and the base more convenient and quick.

[0090] Here, the magnet can be set as a 36mm diameter NdFeB magnet, with a vertical suction force of 88kg and a horizontal suction force of 28kg to meet the balance condition. The base can be made of rubber material. The sleeve, upper support, and support column can be made of different types of plastic materials.

[0091] At the same time, in order to ensure the stability and durability of the connecting assembly parts and connecting components, strong glue can also be used for reinforcement, so that it can penetrate into the interior of the material and form a strong bonding layer to improve the tensile strength and weather resistance of the entire connecting assembly part of the simulated guardrail.

[0092] Based on the same inventive concept as the above embodiments, an embodiment of the present invention provides a computing device, such as Fig. 9 As shown, the computing device includes: a processor 410 and a memory 411 storing a computer program; wherein, Fig. 9 The processor 410 shown in the figure is not used to indicate that the number of the processor 410 is one, but is only used to indicate the positional relationship of the processor 410 relative to other devices. In actual applications, the number of the processor 410 may be one or more; similarly, Fig. 9The memory 411 shown in the figure has the same meaning, that is, it is only used to refer to the position relationship of the memory 411 relative to other devices. In practical applications, the number of memories 411 can be one or more. When the processor 410 runs the computer program, the above-mentioned design method of the simulated guardrail for intelligent driving test is implemented.

[0093] The computing device may also include: at least one network interface 412. The various components in the computing device are coupled together via a bus system 413. It is understood that the bus system 413 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 413 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the bus system 413 is not used in the example above. Fig. 9 Various buses are labeled as bus system 413.

[0094] The memory 411 may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAMbus random access memory (DRRAM, Direct Rambus Random Access Memory).The memory 411 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memories.

[0095] The memory 411 in the embodiment of the present invention is used to store various types of data to support the operation of the computing device. Examples of these data include: any computer program used to operate on the computing device, such as an operating system and an application; contact data; phone book data; messages; pictures; videos, etc. Among them, the operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application program may include various applications, such as a media player, a browser, etc., which are used to implement various application services. Here, the program that implements the method of the embodiment of the present invention may be included in the application program.

[0096] Based on the same inventive concept as the above-mentioned embodiment, this embodiment further provides a computer-readable storage medium, in which a computer program is stored. The computer-readable storage medium may be a ferromagnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); it may also be various devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc. When the computer program stored in the computer-readable storage medium is executed by the processor, the design method of the simulated guardrail for intelligent driving test applied to the above-mentioned computing device is implemented. For the specific steps implemented when the computer program is executed by the processor, please refer to Figure 1 The description of the illustrated embodiment will not be repeated here.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0099] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A design method for a simulated guardrail for intelligent driving testing, characterized in that: include: Comparing the size design data of the simulated guardrail with the preset size information to determine the target size information and structural connection information of the simulated guardrail; Performing physical property testing on a sample of the simulated guardrail to determine target material information of the simulated guardrail; The design data for making the simulated guardrail is determined based on the size parameter information, the structural connection information and the material selection information.

2. The method according to claim 1, characterized in that The step of comparing the size design data of the simulated guardrail with preset size information to determine target size information and structural connection information of the simulated guardrail includes: Compare the dimension design data of the simulated guardrail with the preset dimension information to obtain corresponding difference parameters; If the difference parameter is less than or equal to a preset difference threshold, the size information is determined as the target size information of the simulated guardrail; The structural connection information of the simulated guardrail is determined according to the target size information.

3. The method according to claim 1, characterized in that The testing of physical properties of the sample of the simulated guardrail to determine target material information of the simulated guardrail includes: Testing the physical properties of guardrail samples made of different materials to determine whether the physical properties of the guardrail samples meet the property standards; If it meets the requirements, the target material information is determined according to the production material.

4. The method according to claim 3, characterized in that The method for determining the attribute standard includes: Testing the physical properties of the physical guardrail, including radar reflection properties and infrared characteristics; Based on testing the radar reflection property of the physical guardrail, a first property standard is obtained; and based on testing the infrared property of the physical guardrail, a second property standard is obtained; According to the first attribute standard and the second attribute standard, an attribute standard for detecting the simulated guardrail is determined.

5. The method according to claim 4, characterized in that The testing of the physical properties of the guardrail samples made of different materials to determine whether the physical properties of the guardrail samples meet the property standards includes: Testing the radar reflection property of the guardrail sample, obtaining a first test result, comparing the first test result with the first property standard, and determining whether the radar reflection property of the guardrail sample meets the property standard; and / or, Perform an infrared property test on the guardrail sample, obtain a second test result obtained by the test, compare the second test result with the second attribute standard, and determine whether the infrared property of the guardrail sample meets the attribute standard.

6. The method according to claim 5, characterized in that The comparing the first test result with the first attribute standard to determine whether the radar reflection attribute of the guardrail sample meets the attribute standard includes: Compare the difference between the first test result and the peak value of the radar cross section at the target angle in the first attribute standard; If the difference is within a preset range, it is determined that the radar reflection property of the guardrail sample meets the property standard; And / or, comparing the second test result with the second attribute standard to determine whether the infrared characteristics of the guardrail sample meet the attribute standard, including: Determining the reflectivity interval corresponding to each angle in the second attribute standard; Obtaining reflectivity at at least two angles in the second test result; If the reflectivity is within the reflectivity range corresponding to the angle, it is determined that the infrared characteristics of the guardrail sample meet the attribute standards.

7. A simulated guardrail for intelligent driving test, characterized in that: The method is manufactured by using the design data obtained by any one of the methods of claims 1 to 6.

8. The artificial guardrail according to claim 7, characterized in that: The simulated guardrail includes a sleeve, a magnet, a column, a base, and a corrugated beam. The sleeve is connected to the bottom of the supporting pipe column inside the column. The magnet is embedded in the sleeve so that the column can be fixed to the base through the magnet; the corrugated beam is connected between adjacent columns.

9. A computing device, characterized in that include: A processor and a memory for storing executable instructions; wherein the processor is configured to execute the instructions to implement the method according to any one of claims 1-6.

10. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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