Glare influence position determination method and device, equipment and medium

Abstract

The invention provides a glare influence position determination method and device, equipment and a medium, and relates to the technical field of glare data processing, and the method comprises the steps: S1, obtaining a light source nonlinear change rule of a railway vehicle; s2, based on a light source nonlinear change rule, respectively determining equivalent light curtain brightness and human eye perception glare time of a road target position; s3, determining glare influence significance and glare influence effectiveness of the road target position; s4, when the glare influence significance is not significant or the glare influence effectiveness is invalid, determining the next road target position within the preset step length of the road target position, and returning to the step S2; when the glare influence significance is significant and the glare influence effectiveness is effective, executing the step S5; and S5, taking the road target position with the significant glare influence significance and the effective glare influence effectiveness as the most unfavorable position influenced by the glare. According to the invention, the most unfavorable position influenced by glare can be accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of glare data processing, and in particular to a method, device, equipment and medium for determining a glare impact position. Background Art

[0002] At night, road lighting conditions significantly impact motor vehicle safety. Unfavorable road lighting, such as glare, is a major contributor to nighttime accidents. According to the International Commission on Illumination (CIE), glare is a visual condition caused by improper luminance distribution, excessive brightness variations, or extreme spatial or temporal contrast, which can cause discomfort and reduce the ability to see important objects. When driving on nighttime roads, oncoming light directly impinges on the driver's eyes, causing glare that severely impairs vision and can easily lead to traffic accidents. For example, on bridges or roads at the same level as a railway or highway, the lighting generated by trains and other vehicles can significantly reduce the ambient contrast on highways at the same level as the railway. This can cause glare for drivers, impairing their ability to recognize traffic signs, vehicles, and obstacles.

[0003] In related technologies, linear methods are mostly used to determine the most unfavorable position on the road affected by glare. However, in fact, the most unfavorable position is also affected by nonlinear factors, resulting in low accuracy of the most unfavorable position determined by the linear method. Summary of the Invention

[0004] The problem solved by the present invention is to improve the accuracy of determining the most unfavorable position.

[0005] To solve the above problems, the present invention provides a method, device, equipment and medium for determining a glare-affected position.

[0006] In a first aspect, the present invention provides a method for determining a glare impact position, comprising: S1, obtain the nonlinear variation law of the light source of the railway vehicle; S2, determining the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; S3, determining the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determining the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; S4, when the glare impact significance is not significant, or the glare impact effectiveness is invalid, determining the next road target position within the preset step length of the road target position, returning to step S2, and replacing the road target position with the next road target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing step S5; S5: The highway target position where the glare impact significance is significant and the glare impact effectiveness is effective is determined as the position most unfavorable due to glare.

[0007] Optionally, determining the equivalent light curtain brightness and the glare perception time of the human eye at a target position on the highway based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined by using a disabling glare evaluation method; Based on the nonlinear variation law of the light source, the glare duration formula is used to determine the glare time perceived by the human eye, wherein the glare duration formula includes: ; in, is the time it takes for human eyes to perceive glare, d is the impact distance of railway vehicle glare in the longitudinal direction of the road under the nonlinear change law of the light source, is the railway vehicle operating speed, The maximum speed allowed on the highway.

[0008] Optionally, determining the equivalent light curtain brightness by using a disabling glare evaluation method based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined using the equivalent light curtain brightness empirical formula of the disability glare evaluation method. The equivalent light curtain brightness empirical formula includes: ; in, is the equivalent light curtain brightness, is the illuminance of the glare source perpendicular to the sight plane under the nonlinear variation law of the light source, is the angle between the line of sight and the incident direction of the glare source, K is a constant. When the angle between the sight line and the incident direction of the glare source is expressed as an angle, K is 10. When the angle between the line of sight and the incident direction of the glare source is expressed in radians, .

[0009] Optionally, determining the significance of the glare impact at the target position on the highway according to the equivalent light curtain brightness includes: According to the equivalent light curtain brightness, a threshold increment formula is used to determine the threshold increment, and the threshold increment formula includes: ; Wherein, TI is the threshold increment, is the equivalent light curtain brightness, is the average brightness of the road surface; When the threshold increment is greater than a preset limit index, the glare impact significance is defined as significant; when the threshold increment is less than or equal to the preset limit index, the glare impact significance is defined as insignificant.

[0010] Optionally, obtaining a nonlinear variation law of a light source of a railway vehicle includes: extracting light source characteristic data of the railway vehicle; Based on the light source characteristic data, obtaining illumination data of different spatial positions of the railway vehicle; The nonlinear variation law of the light source is determined according to the illumination data at different spatial positions.

[0011] Optionally, the nonlinear variation law of the light source includes a glare and distance law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: Extracting distance data and illumination data corresponding to the distance from the illumination data at different spatial positions, fitting the distance data and illumination data corresponding to the distance, and generating the glare and distance law.

[0012] Optionally, the nonlinear variation law of the light source includes a glare and angle law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: The angle data and the illuminance data corresponding to the angle are extracted from the illuminance data at different spatial positions, and the angle data and the illuminance data corresponding to the angle are fitted to generate the glare and angle law.

[0013] In a second aspect, the present invention provides a device for determining a glare impact position, comprising: An acquisition module, used to acquire the nonlinear variation law of the light source of the railway vehicle; A data module is used to determine the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; a determination module, configured to determine the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determine the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; a loop module, configured to, when the glare impact significance is insignificant or the glare impact validity is invalid, determine a next highway target position within a preset step length of the highway target position, return to the operation of the data module, and replace the highway target position with the next highway target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing an operation of an output module; The output module is configured to take the highway target position where the glare impact significance is significant and the glare impact effectiveness is effective as the position most unfavorable due to glare.

[0014] In a third aspect, the present invention provides an electronic device comprising a memory and a processor; The memory is used to store computer programs; The processor is configured to implement the method for determining the glare impact position as described in the first aspect when executing the computer program.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining a glare impact position as described in the first aspect is implemented.

[0016] The beneficial effects of the glare impact position determination method, device, equipment and medium of the present invention are: By obtaining the nonlinear variation law of the light source of railway vehicles, such as railway vehicles around one's own car, the variation of the light source of railway vehicles at different spatial positions can be clarified, so as to facilitate the subsequent accurate determination of the position most affected by glare in different spatial positions, that is, the position most unfavorably affected by glare. Then, the equivalent light curtain brightness of the target position on the highway and the time when the human eye perceives glare can be determined respectively through the nonlinear variation law of the light source. The actual impact of glare can be evaluated from two aspects: glare intensity and glare time, avoiding the limitation of only considering brightness and ignoring the time dimension, so as to ensure the accuracy of determining the position most unfavorably affected by glare. When the glare impact significance is When the glare impact significance is not significant, or the glare impact validity is invalid, it means that the highway target position is less affected by glare in terms of both glare intensity and glare time, and will not endanger the driver's safe driving. The next highway target position can be determined by a preset step size to determine the degree of glare impact on the next highway target position. When the glare impact significance is significant and the glare impact validity is valid, it means that the highway target position is greatly affected by glare and will endanger the driver's safe driving. Therefore, the highway target position is output as the most unfavorable position affected by glare, so as to facilitate subsequent corresponding improvements to avoid glare impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of a method for determining a glare impact position provided by an embodiment of the present invention; Figure 2 A schematic diagram of the experimental site layout provided in an embodiment of the present invention; Figure 3A distance illumination scatter plot provided by an embodiment of the present invention; Figure 4 Angle illumination scatter plot provided by an embodiment of the present invention; Figure 5 The function graph corresponding to the overall relationship provided by the embodiment of the present invention; Figure 6 A schematic diagram of the structure of the road-rail leveling provided in an embodiment of the present invention; Figure 7 A curve showing the change in brightness of the equivalent light curtain versus longitudinal distance provided by an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a device for determining a glare impact position provided by an embodiment of the present invention; Figure 9 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0020] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0021] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0022] The names of the messages or information exchanged between multiple devices in the embodiments of the present invention are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0023] In response to the problems existing in the above-mentioned related technologies, embodiments of the present invention provide a method, apparatus, device and medium for determining a glare-affected position.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a method for determining a glare impact position, including: S1, obtain the nonlinear variation law of the light source of the railway vehicle.

[0025] Specifically, when a road vehicle is traveling on a level road, such as a highway or railway, it may encounter oncoming railway vehicles, such as high-speed trains, trains, and motor vehicles. Experiments can be conducted to determine the nonlinear variation patterns of the light sources of these vehicles, such as high-speed trains, trains, and motor vehicles. These nonlinear variation patterns may include the illumination of the railway vehicle's light source at different spatial locations, such as the illumination of the railway vehicle's light source at different distances from the road vehicle or at different heights, i.e., the illumination of the railway vehicle's light source at different angles.

[0026] S2, based on the nonlinear variation law of the light source, respectively determining the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway.

[0027] Specifically, equivalent light curtain brightness converts the interference effect of a glare source in the observer's line of sight into an equivalent light curtain brightness value, quantifying the impact of glare on human visual perception. Higher equivalent light curtain brightness indicates a brighter "light curtain" formed by the glare source in the line of sight, and greater interference with target recognition, i.e., a more significant disabling glare effect. The duration of glare perception by the human eye measures whether the glare persists long enough to pose a threat to driving safety. Experimental studies have shown that when the duration of glare is between 0.1 and 0.5 seconds, pupil constriction remains minimal, regardless of changes in glare intensity. Glare duration exceeding 0.5 seconds indicates glare impairment, potentially posing a traffic accident hazard. The first highway target location can be the centerline of the highway lane closest to the railway.

[0028] S3, determining the significance of the glare impact at the target position on the highway according to the equivalent light curtain brightness, and determining the effectiveness of the glare impact at the target position on the highway according to the glare perception time of the human eye.

[0029] Specifically, the corresponding threshold increment can be determined based on the brightness of the equivalent light curtain, and the significance of the glare impact at the target position on the highway can be determined based on the threshold increment. The threshold increment is a key parameter for measuring the impact of disabling glare on the human eye's visual recognition ability. Its essence is the ratio of the additional contrast required for the driver to identify the target to the original contrast when glare exists, expressed as a percentage (%). When a glare source illuminates the human eye, a scattered light curtain will be formed on the retina, reducing the contrast between the target and the background. The larger the threshold increment, the more significant the glare interference with the visual function, the weaker the driver's ability to identify traffic signs or obstacles, and the greater the corresponding glare impact significance. Conversely, the smaller the threshold increment, the less significant the glare interference with the visual function, the stronger the driver's ability to identify traffic signs or obstacles, and the smaller the corresponding glare impact significance. When the duration of glare is between 0.1 and 0.5 s, the pupil size of the human eye does not change much regardless of how the glare intensity changes. When the glare duration exceeds 0.5 s, the pupil size of the human eye changes significantly, indicating that the eye is affected by the glare. Therefore, the effectiveness of the glare effect on the target location on the highway is determined based on the time the human eye perceives the glare. When the time the human eye perceives the glare is greater than 0.5 s, the effectiveness of the glare effect on the target location on the highway is determined to be effective. When the time the human eye perceives the glare is less than or equal to 0.5 s, the effectiveness of the glare effect on the target location on the highway is determined to be ineffective.

[0030] S4, when the glare impact significance is not significant, or the glare impact effectiveness is invalid, determine the next highway target position within the preset step size of the highway target position, return to step S2, and replace the highway target position with the next highway target position.

[0031] When the glare impact significance is significant and the glare impact effectiveness is effective, step S5 is executed.

[0032] Specifically, when the glare impact significance is insignificant or the glare impact effectiveness is invalid, it indicates that the road target location is only slightly affected by glare in terms of both glare intensity and glare duration, and will not endanger the driver's safe driving. The next road target location can be determined using a preset step size. That is, the road target location is laterally shifted by the preset step size to obtain the next road target location. The preset step size can be set according to actual conditions, for example, 0.01m. The degree of glare impact of the next road target location is then determined. When the glare impact significance is significant and the glare impact effectiveness is valid, it indicates that the road target location is significantly affected by glare, which will endanger the driver's safe driving. Therefore, this road target location is output as the location with the most adverse glare impact. When the glare impact significance is insignificant for all locations on the road, or the glare impact effectiveness is invalid, it indicates that there is no glare-affected location on the road, and the location with the most adverse glare impact is not output.

[0033] S5: The highway target position where the glare impact significance is significant and the glare impact effectiveness is effective is determined as the position most unfavorable due to glare.

[0034] Specifically, the target position on the highway where the glare impact significance is significant and the glare impact effectiveness is effective is regarded as the most unfavorable position affected by glare, so as to facilitate anti-glare design and layout and ensure driving safety.

[0035] In this embodiment, by obtaining the nonlinear variation law of the light source of railway vehicles, such as railway vehicles around the vehicle itself, the nonlinear variation of the light source of the railway vehicle at different spatial positions can be clarified, thereby facilitating the subsequent accurate determination of the position most affected by glare among the different spatial positions, that is, the position most adversely affected by glare. Then, based on the nonlinear variation law of the light source, the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway can be determined respectively. The actual impact of glare can be evaluated from two aspects, namely, the significance and effectiveness of glare, from the perspectives of glare intensity and glare time, avoiding the limitation of only considering brightness and ignoring the time dimension, so as to ensure the accuracy of determining the position most adversely affected by glare. When the glare impact significance is not significant, or the glare impact effectiveness is invalid, it means that the highway target position is less affected by glare in terms of glare intensity and glare time, and will not endanger the driver's safe driving. The next highway target position can be determined by a preset step size to determine the degree of glare impact on the next highway target position. When the glare impact significance is significant and the glare impact effectiveness is valid, it means that the highway target position is greatly affected by glare and will endanger the driver's safe driving. Therefore, the highway target position is output as the most unfavorable position affected by glare, so as to facilitate subsequent corresponding improvements to avoid glare impact.

[0036] Optionally, determining the equivalent light curtain brightness and the glare perception time of the human eye at a target position on the highway based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined by using a disabling glare evaluation method; Based on the nonlinear variation law of the light source, the glare duration formula is used to determine the glare time perceived by the human eye, wherein the glare duration formula includes: ; in, is the time it takes for human eyes to perceive glare, d is the impact distance of railway vehicle glare in the longitudinal direction of the road under the nonlinear change law of the light source, is the railway vehicle operating speed, The maximum speed allowed on the highway.

[0037] Specifically, the Disabling Glare Assessment Method is a scientific approach used to quantify the degree to which glare sources interfere with the human eye's visual perception. This approach is primarily achieved through equivalent light curtain brightness calculation and threshold increment analysis. Its core principle is based on the human visual characteristics: when glare light enters the human eye, it forms a scattered light curtain on the retina, reducing the contrast between the driver's visual target and the background, leading to a decrease in visual perception. The Disabling Glare Assessment Method quantifies this scattering effect to determine the actual impact of glare on the driver. The glare duration formula can be used to determine the duration of glare perception by the human eye. The longitudinal impact distance of railway vehicle glare on the road can be determined based on the nonlinear variation of the light source. Specifically, the longitudinal impact distance d of railway vehicle glare on the road is calculated based on the nonlinear variation of the light source. Specifically, the longitudinal impact distance d of railway vehicle glare on the road is the illumination intensity of the railway vehicle light source on road vehicles at different distances, as determined by the nonlinear variation of the light source.

[0038] For example, when a specific lateral distance position is selected as the highway target position for evaluating the effectiveness of glare impact on the highway, d is the longitudinal distance where the glare impact significance meets the preset impact level and the driver's line of sight is within 4° of the high-speed rail light source. When the railway vehicle is running at a speed of 200 ~ 300 km / h, the maximum speed allowed on expressways When the speed is 80 km / h, it is determined that the time for human eyes to perceive glare is greater than 0.5s, then the effectiveness of the glare impact at this position is effective, and this position is the most unfavorable position affected by glare.

[0039] Optionally, determining the equivalent light curtain brightness by using a disabling glare evaluation method based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined using the equivalent light curtain brightness empirical formula of the disability glare evaluation method. The equivalent light curtain brightness empirical formula includes: ; in, is the equivalent light curtain brightness, is the illuminance of the glare source perpendicular to the sight plane under the nonlinear variation law of the light source, is the angle between the line of sight and the incident direction of the glare source, K is a constant. When the angle between the sight line and the incident direction of the glare source is expressed as an angle, K is 10. When the angle between the line of sight and the incident direction of the glare source is expressed in radians, .

[0040] Specifically, the illuminance of the glare source perpendicular to the sight plane under the nonlinear variation law of the light source is It refers to the illumination of railway vehicle light source on road vehicles at different angles in the nonlinear change law of light source.

[0041] Optionally, determining the significance of the glare impact at the target position on the highway according to the equivalent light curtain brightness includes: According to the equivalent light curtain brightness, a threshold increment formula is used to determine the threshold increment, and the threshold increment formula includes: ; Wherein, TI is the threshold increment, is the equivalent light curtain brightness, is the average brightness of the road surface; When the threshold increment is greater than a preset limit index, the glare impact significance is defined as significant; when the threshold increment is less than or equal to the preset limit index, the glare impact significance is defined as insignificant.

[0042] Specifically, TI is the threshold increment, which can also represent the significance of glare. The threshold increment is a key parameter for measuring the impact of disabling glare on human visual perception. Essentially, it is the ratio of the additional contrast required for a driver to identify a target in the presence of glare to the original contrast, expressed as a percentage (%). When a glare source illuminates the human eye, it forms a veil of scattered light on the retina, reducing the contrast between the target and the background. A larger threshold increment indicates a more significant interference with visual function, weakening the driver's ability to identify traffic signs or obstacles, and correspondingly increasing the significance of the glare. For example, based on the International Commission on Luminous Illumination's (CIE) recommended indicators for limiting nighttime glare, in the application environment of the present invention, the maximum initial value of the glare limit threshold increment, TI, is 10%. That is, the preset limit indicator can be set to greater than 10%. The calculated threshold increment is compared with the preset limit indicator. When the threshold increment is greater than the preset impact level, i.e., the threshold increment is greater than 10%, it indicates that the glare significance at the target location on the highway is significant and will seriously affect the driver's safe driving.

[0043] Optionally, obtaining a nonlinear variation law of a light source of a railway vehicle includes: extracting light source characteristic data of the railway vehicle; Based on the light source characteristic data, obtaining illumination data of different spatial positions of the railway vehicle; The nonlinear variation law of the light source is determined according to the illumination data at different spatial positions.

[0044] Specifically, railway vehicle light sources include headlights and carriage lights. Headlights are located at the front of the train and provide both illumination and warning. Carriage lights include ceiling lights, wall lights, and other fixtures within the train compartments. When analyzing the impact of glare, this paper considers high-speed train headlights as the primary light source and extracts light source characteristic data for these headlights. Light source characteristic data refers to data such as the type of light source, light intensity, irradiation distance, the angle between the lamp cone and the busbar, and focusing properties. For example, the light intensity of a gas discharge light source on the reference axis can reach 600,000 cd, and the irradiation distance can reach 450m. The angle between the lamp cone and the busbar of this headlamp is 4°, and its focusing property is very good. The intensity of the light beam diverging to the periphery is not high. The relative light intensity on the busbar of the lamp cone at 4° in the horizontal direction is only 3% of the light intensity on the reference axis. Another example is a halogen tungsten light source with a light intensity of 400,000 cd on the reference axis and an irradiation distance of 350m. The angle between the lamp cone and the busbar of this headlamp is 4°, and its focusing property is worse than that of a gas discharge light source. There are more light beams distributed on the periphery. The relative light intensity on the busbar of the lamp cone at 4° in the horizontal direction is 8% of the light intensity on the reference axis. Because the theoretical illumination range of a high-speed train light source is a cone, its illumination intensity is affected by the interaction of three variables: the horizontal distance, the vertical distance, and the vertical distance of the light source, rather than the independent influence of the three variables. Therefore, the influence of these three dependent variables, the horizontal distance, the vertical distance, and the vertical distance, on the illumination intensity cannot be described by a linear relationship. Therefore, based on the light source characteristic data, an experiment was constructed using the total distance and angle between the observation point and the light source as dependent variables. An experimental site, vehicle model, and appropriate experimental time that met the measurement experimental conditions were selected. Different spatial locations around the high-speed train were selected to measure the changes in illumination within the spatial range. Illumination data at different spatial locations on the high-speed train were obtained, and the attenuation of the illumination intensity was analyzed to determine the nonlinear variation law of the light source.

[0045] For example, the experimental site is arranged as follows Figure 2 As shown, the track spacing on both sides of the track can be set to 1.5025m, the height difference between the centerline of the track and the track surface can be set to 0.12m, and the height difference between the track surface and the parking lot ground can be set to 0.7m. The black measuring points can be measured at four heights of 0.98m, 1.35m, 1.61m, and 2.11m. The four heights are respectively the left track measuring distance to the track surface height, the right track measuring distance to the track surface height, the centerline measuring distance to the track ground height, and the parking lot measuring distance to the ground height. The gray measuring point can be measured at a height of 2.11m from the parking lot ground height.

[0046] Optionally, the nonlinear variation law of the light source includes a glare and distance law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: Extracting distance data and illumination data corresponding to the distance from the illumination data at different spatial positions, fitting the distance data and illumination data corresponding to the distance, and generating the glare and distance law.

[0047] Specifically, the distance data and the illumination data corresponding to the distance are extracted from the illumination data of different spatial positions, and the following is constructed: Figure 3 The distance illumination scatter diagram shown in FIG is fitted according to the distance illumination scatter diagram to obtain the following Figure 3 The dashed line illustrates the glare-distance relationship, indicating that illuminance is inversely proportional to the square of the distance from the light source. This glare-distance relationship allows us to determine the illuminance of a railway vehicle's light source on road vehicles at varying distances. For example, to avoid adverse effects of large angle variations on the analysis results, experimental data can be captured within a 0.4° angle from the light source.

[0048] Optionally, the nonlinear variation law of the light source includes a glare and angle law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: The angle data and the illuminance data corresponding to the angle are extracted from the illuminance data at different spatial positions, and the angle data and the illuminance data corresponding to the angle are fitted to generate the glare and angle law.

[0049] Specifically, the angle data and the illuminance data corresponding to the angle are extracted from the illuminance data at different spatial positions, and the following formula is constructed: Figure 4 The angle illuminance scatter diagram shown in FIG is fitted according to the angle illuminance scatter diagram, and the following is obtained: Figure 4 The dotted line shows the glare-angle relationship, indicating a decreasing illuminance value relative to the square root of the angle between the light source and the centerline. Based on this glare-angle relationship, we can determine the illuminance of a railway vehicle's light source on road vehicles at different heights, specifically, the illuminance of a railway vehicle's light source at different angles. For example, to avoid significant distance variations from negatively impacting the analysis results, we can capture experimental data at a distance of approximately 100 meters from the light source.

[0050] In one embodiment, based on the glare-distance and glare-angle laws, a comprehensive nonlinear light source variation law can be analyzed, that is, the overall relationship between illuminance, distance, and angle: ; Then, based on the experimental data, the influence coefficient a is 593947.7 and b is -13.9, so the overall relationship is: ; Among them, the function graph corresponding to the overall relationship is as follows Figure 5 shown.

[0051] For example, to make the method for determining the location of glare impact of the present invention clearer, this embodiment is described with an actual case: This embodiment selects a Yangtze River Bridge as the road-rail leveling location. Figure 6 As shown in the figure, the Yangtze River Bridge includes four railways in the middle and highways on both sides, and the lateral distance between the highways and railways is relatively close. The centerline of the innermost lane is initially selected as the first highway target position for evaluation. Its lateral distance is 4.1+1.8+0.5+0.5+1.75=8.65m; For example, the CRH5, which is a higher height, is selected for calculation. The headlight height of the CRH5 is 3.215m. Considering the difference in vehicle types, some space is reserved on the basis of 3.215m, and the height of the high-speed rail locomotive headlight from the track surface is calculated as 3.3m. Figure 6 As shown, the height difference between the track surface and the road is about 0.9 m. According to the "Design Rules for Highway Traffic Safety Facilities", the sight height of the outermost truck driver is calculated as 2.2 m, so the height difference is 3.3-2.2=2 m.

[0052] In this embodiment, when the horizontal distance between the high-speed rail and the highway is x, the vertical distance is y, and the height difference is h, based on the above overall relationship, the light source illumination can be obtained as: ; Then the equivalent light curtain brightness is: ; Among them, the horizontal distance x is 8.65m and the height difference h is 2m, so the anti-glare angle between the line of sight and the incident light of the glare source can be obtained for , according to the equivalent light curtain brightness at this time, construct Figure 7 The curve of the equivalent light curtain brightness value changing with the longitudinal distance is shown in the figure. When the angle is greater than 4° and the longitudinal distance y is 124m, the influence of the light source is significantly weakened. Therefore, y=124m is the critical longitudinal distance for glare. At this time, the equivalent light curtain brightness value is 6.4cd / m 2 , then the threshold increment at this time is: ; Therefore, the center line of the innermost lane is preliminarily selected as the first highway target position, and its threshold increment is greater than 10%. The glare impact significance of this position is significant.

[0053] like Figure 7 As shown in the figure, the vertical distance of high-speed rail glare is 124 to 152 m. Considering that the high-speed rail operating speed is 200 to 300 km / h and the design speed of the highway is 80 km / h, the lower limit time for human eye to perceive glare is: ; The upper limit time for human eye to perceive glare is: ; The glare duration does not exceed 0.5s, so the glare effect at this location is invalid. The next target location on the highway is determined based on the preset step size of 0.01m. After multiple calculations, it is found that when the lateral distance is 8.2m, the driver is significantly and effectively affected by the glare. This location is selected as the most unfavorable location affected by glare.

[0054] It should be understood that in actual calculations, the y value should be a known value set according to the actual road conditions. In order to quickly verify the significance and effectiveness of the unknown highway target position, this embodiment adopts the following method: Figure 7 The method of reversely calculating the curve of the equivalent light curtain brightness value versus longitudinal distance shown is based on the same principle as that of calculating using known values.

[0055] like Figure 8 As shown, an embodiment of the present invention provides a device for determining a glare impact position, comprising: An acquisition module, used to acquire the nonlinear variation law of the light source of the railway vehicle; A data module is used to determine the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; a determination module, configured to determine the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determine the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; a loop module, configured to, when the glare impact significance is insignificant or the glare impact validity is invalid, determine a next highway target position within a preset step length of the highway target position, return to the operation of the data module, and replace the highway target position with the next highway target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing an operation of an output module; The output module is configured to take the highway target position where the glare impact significance is significant and the glare impact effectiveness is effective as the position most unfavorable due to glare.

[0056] like Figure 9 As shown, an electronic device 900 provided by an embodiment of the present invention includes a memory 910 and a processor 920; the memory 910 is used to store a computer program; the processor 920 is used to implement the above-mentioned method for determining the glare impact position when executing the computer program.

[0057] In other words, an electronic device 900 includes a memory 910 and a processor 920 coupled to the memory 910; the memory 910 is configured to store a computer program; and the processor 920 is configured to perform the following operations when executing the computer program: S1, obtain the nonlinear variation law of the light source of the railway vehicle; S2, determining the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; S3, determining the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determining the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; S4, when the glare impact significance is not significant, or the glare impact effectiveness is invalid, determining the next road target position within the preset step length of the road target position, returning to step S2, and replacing the road target position with the next road target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing step S5; S5: The highway target position where the glare impact significance is significant and the glare impact effectiveness is effective is determined as the position most unfavorable due to glare.

[0058] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the above-mentioned method for determining a glare impact position is implemented.

[0059] In other words, a non-volatile computer-readable storage medium stores a computer program, which, when executed by a processor, causes the processor to perform the following operations: S1, obtain the nonlinear variation law of the light source of the railway vehicle; S2, determining the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; S3, determining the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determining the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; S4, when the glare impact significance is not significant, or the glare impact effectiveness is invalid, determining the next road target position within the preset step length of the road target position, returning to step S2, and replacing the road target position with the next road target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing step S5; S5: The highway target position where the glare impact significance is significant and the glare impact effectiveness is effective is determined as the position most unfavorable due to glare.

[0060] An electronic device 900 that can serve as a server or client of the present invention will now be described, which is an example of a hardware device that can be applied to various aspects of the present invention. The electronic device 900 is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device 900 can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0061] Electronic device 900 includes a computing unit that can perform various appropriate actions and processes based on a computer program stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). The RAM can also store various programs and data required for device operation. The computing unit, ROM, and RAM are interconnected via a bus. An input / output (I / O) interface is also connected to the bus.

[0062] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM). In this application, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network elements. Some or all of these units can be selected based on actual needs to achieve the objectives of the embodiments of the present invention. Furthermore, the functional units in the various embodiments of the present invention can be integrated into a single processing unit, each unit can exist physically separately, or two or more units can be integrated into a single unit. These integrated units can be implemented in either hardware or software functional units.

[0063] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for determining a glare impact position, characterized in that: include: S1, obtain the nonlinear variation law of the light source of the railway vehicle; S2, determining the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; S3, determining the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determining the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; S4, when the glare impact significance is not significant, or the glare impact effectiveness is invalid, determining the next road target position within the preset step length of the road target position, returning to step S2, and replacing the road target position with the next road target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing step S5; S5: The highway target position where the glare impact significance is significant and the glare impact effectiveness is effective is determined as the position most unfavorable due to glare.

2. The method for determining the glare impact position according to claim 1, wherein: The determining of the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined by using a disabling glare evaluation method; Based on the nonlinear variation law of the light source, the glare duration formula is used to determine the glare time perceived by the human eye, wherein the glare duration formula includes: ； in, is the time it takes for human eyes to perceive glare, d is the impact distance of railway vehicle glare in the longitudinal direction of the road under the nonlinear change law of the light source, is the railway vehicle operating speed, The maximum speed allowed on the highway.

3. The method for determining the glare impact position according to claim 2, wherein: The determining of the equivalent light curtain brightness by using a disabling glare evaluation method based on the nonlinear variation law of the light source includes: Based on the nonlinear variation law of the light source, the equivalent light curtain brightness is determined using the equivalent light curtain brightness empirical formula of the disability glare evaluation method. The equivalent light curtain brightness empirical formula includes: ； in, is the equivalent light curtain brightness, is the illuminance of the glare source perpendicular to the sight plane under the nonlinear variation law of the light source, is the angle between the line of sight and the incident direction of the glare source, K is a constant. When the angle between the sight line and the incident direction of the glare source is expressed as an angle, K is 10. When the angle between the line of sight and the incident direction of the glare source is expressed in radians, .

4. The method for determining the glare impact position according to claim 1, wherein: Determining the significance of the glare impact at the target position on the highway according to the equivalent light curtain brightness includes: According to the equivalent light curtain brightness, a threshold increment formula is used to determine the threshold increment, and the threshold increment formula includes: ； Wherein, TI is the threshold increment, is the equivalent light curtain brightness, is the average brightness of the road surface; When the threshold increment is greater than a preset limit index, the glare impact significance is defined as significant; when the threshold increment is less than or equal to the preset limit index, the glare impact significance is defined as insignificant.

5. The method for determining the glare impact position according to claim 1, wherein: The obtaining of the nonlinear variation law of the light source of the railway vehicle includes: extracting light source characteristic data of the railway vehicle; Based on the light source characteristic data, obtaining illumination data of different spatial positions of the railway vehicle; The nonlinear variation law of the light source is determined according to the illumination data at different spatial positions.

6. The method for determining the glare impact position according to claim 5, characterized in that: The nonlinear variation law of the light source includes a glare and distance law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: The distance data and the illuminance data corresponding to the distance are extracted from the illuminance data of the different spatial positions, and the distance data and the illuminance data corresponding to the distance are fitted to generate the glare and distance law.

7. The method for determining the glare impact position according to claim 5, wherein: The nonlinear variation law of the light source includes a glare and angle law; and determining the nonlinear variation law of the light source according to the illumination data at different spatial positions includes: The angle data and the illuminance data corresponding to the angle are extracted from the illuminance data at different spatial positions, and the angle data and the illuminance data corresponding to the angle are fitted to generate the glare and angle law.

8. A device for determining a glare-affected position, characterized in that: include: An acquisition module, used to acquire the nonlinear variation law of the light source of the railway vehicle; A data module is used to determine the equivalent light curtain brightness and the glare perception time of the human eye at the target position on the highway based on the nonlinear variation law of the light source; a determination module, configured to determine the significance of the glare impact at the target location on the highway based on the equivalent light curtain brightness, and determine the effectiveness of the glare impact at the target location on the highway based on the glare perception time of the human eye; a loop module, configured to, when the glare impact significance is insignificant or the glare impact validity is invalid, determine a next highway target position within a preset step length of the highway target position, return to the operation of the data module, and replace the highway target position with the next highway target position; When the glare impact significance is significant and the glare impact effectiveness is effective, executing an operation of an output module; The output module is configured to take the highway target position where the glare impact significance is significant and the glare impact effectiveness is effective as the position most unfavorable due to glare.

9. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is configured to implement the method for determining a glare impact position according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by a processor, the method for determining a glare impact position according to any one of claims 1 to 7 is implemented.

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