CN104933241A - Evaluation method for discomfort glare of train driving interface illumination - Google Patents

Abstract

The invention discloses a method for evaluating uncomfortable glare of train driving interface lighting. The method comprises the following steps: establishing a three-dimensional model of the train driving interface, obtaining a driver's visual simulation image and the parameters of each pixel in the image through an optical simulation tool; according to the design Determine the glare source pixel points from each pixel point according to the specified judgment conditions, and calculate the average value of the brightness value of the non-glare source pixel points in the image as the background brightness value; integrate the adjacent glare source pixel points into a glare source area, Obtain multiple glare source areas; divide each glare source area into a general glare source area and a small glare source area according to the size of the area, and collect the data of each general glare source area and each small glare source area; calculate the UGR of the image according to the evaluation model value, and evaluate the uncomfortable glare of the train driving interface lighting. The technical scheme of the invention can evaluate the illumination glare of the train driving interface at the early stage of design, so as to reduce the cost and shorten the design period.

Description

An evaluation method for uncomfortable glare of train driving interface lighting

technical field

The invention relates to the field of train driving interface lighting systems. More specifically, it relates to a method for evaluating uncomfortable glare of train driving interface lighting.

Background technique

Lighting system design, as an important part of driving interface design, plays an important role in timely and accurate acquisition of visual information for drivers, alleviating visual fatigue and ensuring driving safety. Factors affecting the lighting quality of the driving interface include illuminance level, luminance distribution, illuminance uniformity, illuminance stability, glare, etc., among which glare is the most important factor affecting the lighting quality. There is a close matching relationship between the design of the driving interface and the lighting, such as the relative positional relationship between the lighting equipment and the driving interface, the curvature, shape, inclination, size of the windshield, the layout of the on-board instruments and display devices, and the improper selection of surface materials may lead to Glare occurs. How to evaluate lighting glare is one of the prerequisites for judging the lighting quality of the driving interface, and it is of great significance for guiding the design and optimization of the train driving interface.

Based on the experimental basis of the traditional glare evaluation method, the International Commission on Illumination defines glare as a visual condition that causes discomfort or weakens the ability to distinguish detailed objects due to inappropriate distribution or range of luminance, or too strong contrast, and according to the visual state It is divided into discomfort glare and disability glare. Discomfort glare refers to the glare that produces discomfort but does not necessarily impair the visibility of the target. Controlling discomfort glare will simultaneously make disability glare fully controlled. The research on the uncomfortable glare evaluation model began in the 1920s. In the following decades, various countries studied and established a model characterizing the relationship between uncomfortable glare influencing factors and subjective perception through experimental methods, and formed such as the British The BGI model established by Petherbridge and Hopkingson, the VCP model established by American scholar Guth, etc. are used to evaluate the uncomfortable glare of indoor lighting. The literature has carried out experimental research on the correlation between several discomfort glare evaluation models including BGI and VCP and subjective perception, and the results show that the correlation between the two is poor, that is, the above systems cannot better reflect the subjective discomfort of glare. comfortable feeling. In 1983, CIE once adopted the glare index CGI improved by South African scholar Einhorn, and then introduced a new unified glare evaluation formula in 1995 to calculate the unified glare value UGR. The correlation coefficient between the unified glare value UGR and the subjective discomfort of glare reaches 0.95 through subjective evaluation experiments in the literature, so this formula is considered to be the most ideal evaluation model for indoor lighting discomfort glare so far. The establishment of the discomfort glare evaluation model makes it possible to evaluate the lighting glare of the driving interface by measuring the calculation parameters required by the UGR discomfort glare evaluation model.

In recent years, the display device in the train driving interface has shown a trend of centralized parameters, intelligent display, and glass, which leads to a more complex lighting environment, and greatly increases the possibility and complexity of uncomfortable glare. Using subjective experiments and on-site measurement of UGR glare evaluation model calculation parameters to evaluate lighting discomfort glare will face many problems. It is also difficult to ensure the accuracy of model calculation parameter values by measurement methods for glare areas that are determined but have uneven brightness. The more serious problem is that the traditional lighting glare evaluation method relies on physical models, so it cannot be completed in the early stage of driving interface design, which will lead to If problems are found after the prototype car is built, improving the lighting environment may lead to a series of changes in the car body structure, electrical equipment layout, etc., which will inevitably increase the manufacturing cost and prolong the design cycle.

Therefore, it is necessary to provide an evaluation method for uncomfortable glare of train driving interface lighting.

Contents of the invention

The object of the present invention is to provide a method for evaluating uncomfortable glare of train driving interface lighting, which solves the problem that the boundaries of glare sources produced by train driving interface lighting in complex lighting environments in the prior art are difficult to define and traditional experimental evaluation methods rely on physical models. And other issues.

To achieve the above object, the present invention adopts the following technical solutions:

A method for evaluating uncomfortable glare of train driving interface lighting, the method comprising the steps of:

S1. Establish a three-dimensional model of the train driving interface, and obtain the driver's visual simulation image and the coordinate values, brightness values and illuminance value parameters of each pixel in the image through an optical simulation tool;

S2. Determine the glare source pixel points from each pixel point according to the set determination conditions, and calculate the average value of the luminance values of the non-glare source pixel points in the image as the background luminance value;

S3. Integrating adjacent glare source pixels among the glare source pixels into one glare source area to obtain multiple glare source areas;

S5. Divide each glare source area into a general glare source area and a small glare source area according to the size of the area, collect the luminance value, solid angle and position index of the geometric center of each general glare source area, and collect the luminous intensity of each small glare source area , the distance from the geometric center to the train driver's eye point and the position index of the geometric center;

S6. Calculate the unified glare value UGR of the image according to the uncomfortable glare evaluation model of the train driving interface lighting, and evaluate the uncomfortable glare of the train driving interface lighting according to the unified glare value. The model formula of the uncomfortable glare evaluation model of the train driving interface lighting is: :

$\mathrm{<span\; class="notranslate">\; u</span>}\mathrm{<span\; class="notranslate">\; G</span>}\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 8</span>}\mathrm{<span\; class="notranslate">\; log</span>}\frac{\mathrm{<span\; class="notranslate">\; 0.25</span>}}{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}<span\; class="notranslate">\; (</span>\underset{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; h</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; +</span>\underset{\mathrm{<span\; class="notranslate">\; q</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; Q</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{\mathrm{<span\; class="notranslate">\; 200</span>}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; )</span>$

In the formula, H is the total number of general glare source areas; Q is the total number of small glare source areas; L _h is the brightness value of the hth general glare source area (cd/m2); L _b is the background brightness value of the image (cd /m2); ω _h is the solid angle (sr) of the hth general glare source area; _Ph is the position index of the geometric center of the hth general glare source area; I _q is the qth small glare source area in the train driver The light intensity in the line of sight (cd), r _q is the distance (m) between the qth small glare source area and the eye; P _q is the position index of the geometric center of the qth small glare source area.

Preferably, after step S3 and before step S5, the following steps are also included:

S4. Screen out the glare source area composed of no more than 2-10 glare source pixels.

Preferably, the judging condition of the glare source pixel in step S2 is: a pixel whose luminance value exceeds 4 times the average luminance value of all pixels in the image is regarded as a glare source pixel.

Preferably, in step S5, the method of dividing each glare source area into a general glare source area and a small glare source area according to the size of the area is as follows: the glare source area with a projected area greater than or equal to ^0.005m2 is used as a general glare source area, and the projected area The glare source area less than 0.005m ² is regarded as the small glare source area.

The beneficial effects of the present invention are as follows:

The technical scheme of the present invention clarifies the boundary of the glare source produced by the illumination of the train driving interface in a complex lighting environment. Based on the simulation of the digital model, it does not rely on the physical model. Therefore, the glare of the illumination of the train driving interface can be evaluated at the initial stage of design to reduce the glare of the train driving interface. cost and shorten the design cycle.

Description of drawings

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Figure 1 shows the flow chart of the uncomfortable glare evaluation method for train driving interface lighting.

Fig. 2 shows the coordinate definition of the position index expression in the model calculation parameters.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figure 1, the uncomfortable glare evaluation method of train driving interface lighting provided in this embodiment includes the following steps:

Step1, establish the three-dimensional model of the train driving interface, obtain the driver's visual simulation image and the parameters such as the coordinate value, brightness value, and illumination of each pixel point in the image in the image through the optical simulation tool;

Step2. Set the judging conditions of the glare source pixel points, traverse each pixel point in the visual simulation image, judge the glare source pixel points from each pixel point according to the judging conditions of the glare source pixel points, and judge it as glare in the collected image Calculate the average value of the brightness values of all other pixels except the source pixel as the background brightness value;

Step3. Integrate the independent glare source pixels according to whether they are adjacent to each other, and integrate the adjacent glare source pixels into one glare source area to obtain several glare source areas.

Step4, set the screening conditions, according to the screening conditions to screen out the integrated glare source areas that meet the screening conditions, step Step4 is an optional step;

Step5. Determine the area size of each glare source area. The glare source area judged to be a general glare source area (projected area greater than or equal to 0.005m ² ) collects and calculates parameters based on the UGR model—the brightness value, solid angle and The location index of the geometric center, the glare source area judged as a small glare source area (projected area less than 0.005m ² ) is collected and calculated according to the small light source UGR correction model—the luminous intensity of the small glare source area, the distance from the geometric center to the train driver’s eyes the distance of the point and the location index of the geometric center;

Step6. Input the parameters collected in the above process into the train driving interface lighting discomfort glare evaluation model to calculate the UGR value of the image, and evaluate the uncomfortable glare of the train driving interface lighting according to the UGR value and subjective feeling relationship table.

in,

The specific process of step Step1 is:

Taking the optical simulation analysis module of SPEOS CAA V5Based V16.1.1 as an example, the 3D model of the train driving interface is established in the CATIA tool, the model is simplified under the premise of ensuring the integrity of the interior, and the optical properties of the material of the driving interface model are defined. The optical properties of the material are passed through OMS2 The optical property measuring instrument collects information such as the color of the material and the reflectivity, transmittance, absorptivity, and scattering of light of different wavelengths. Define lighting source parameters, including spotlights, console displays, instruments, etc. The driver's vision detector is constructed to simulate the driver's vision based on the maximum direct field of view of the human eye in the horizontal and vertical directions. The driver's horizontal viewing angle is 120°, and the vertical viewing angle is 90°. Obtain the simulation calculation results through the SPEOS CAA V5 Based V16.1.1 optical simulation analysis module and output the XMP file, which records the visual simulation image and the coordinate value, brightness, illuminance and other parameters of each pixel in the image in the image, among which The coordinate value of each pixel point on the image reflects the information of the three-dimensional space object after the driver's eye point passes through the point and projects the light to the image plane, that is, the projection of the three-dimensional space on the plane image.

The specific process of step Step2 is:

In order to consider the adaptation of the human eye to the brightness of the environment, first calculate the average brightness value in the field of view of the entire simulation image, and then take the pixels that exceed 4 times the brightness value as glare source pixels, thus establishing the judgment conditions for glare source pixels . In this embodiment, the XMP file is read through Visual Basic language programming, and the brightness value of each pixel in the simulation image is compared with the average brightness of all pixels in the entire simulation image, and a number of independent glare sources are determined according to the above-mentioned glare source determination conditions glare source pixels.

For the background brightness L _b of the image, traverse all other pixels in the image except for the pixels judged as glare sources, and calculate the average brightness of these points as the background brightness L _b , the expression is:

${\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; g</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; G</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; g</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; G</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

Wherein: L _g is the luminance (cd/m ² ) of the gth non-glare source pixel point in the simulation image; G is the number of non-glare source pixel points in the image.

The specific process of step Step3 is:

According to the characteristics of UGR model and small light source UGR correction model calculation parameters, the independent glare source pixels are integrated into the glare source area, so that the calculation factors such as the boundary and type of the glare source can be judged, and the independent glare source pixels adjacent to each other can be integrated for application The following algorithm:

Traversing the t glare source pixels determined in step 2, if the adjacent pixel of a glare source pixel is also a glare source pixel (since the traversal process is from the pixel in the upper left corner of the image to the pixel in the lower right corner, it is only necessary to determine the left and upper pixels), then they belong to the same glare area, then change the number of the glare source pixel to be the same as the number of the first pixel of the glare area, that is, the glare that belongs to the same glare area The numbers of the source pixels are uniform, and by analogy, several glare regions (that is, sets of several glare source pixels with the same number in each set) can be obtained. Complete the integration process, the code is as follows:

The specific process of step Step4 is:

After the integration of independent glare source pixels, there may still be some independent glare source pixels (scattered points) in the visual simulation image. Because the area of these scattered glare sources is too small, they often do not even exist in reality. According to the uncomfortable glare model, its impact on the evaluation results can be ignored, so the screening condition is set as the glare source area composed of no more than 2-10 glare source pixels, and the unreasonable glare source area that meets the screening conditions Screening is carried out, and the specific number of screening conditions is 2 or 3 or 4, etc. to be set according to actual needs.

The specific process of step Step5 is:

After completing the extraction, determination, integration, and screening processes of Step 1 to Step 4 above, the obtained glare area is divided into general glare source area (projected area greater than or equal to 0.005m ² ) and small glare area according to the size of the projected area of the glare source area. For the source area (the projected area is less than 0.005m ² ), the related parameters are collected as follows:

For the brightness L _i' of the general glare source area, the average value of the brightness of all pixels in the general glare source area is taken as the brightness value of the general glare source area, and its expression is as follows:

${\mathrm{<span\; class="notranslate">\; L</span>}}_{{\mathrm{<span\; class="notranslate">\; i</span>}}^{<span\; class="notranslate">\; \&prime;</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; K</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; K</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Where: L _k is the luminance (cd/m ² ) of the kth pixel in the general glare source area; K is the number of pixels in the general glare source area.

For the solid angle ω of the general glare source area, the following formula can be used to calculate:

$\mathrm{<span\; class="notranslate">\; \&omega;</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; p</span>}}}{{\mathrm{<span\; class="notranslate">\; r</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

Among them: A _p is the projected area on the normal plane of the line connecting the geometric center of the general glare source area and the train driver’s eye point (m ² ); r is the distance (m) from the geometric center of the general glare source area to the train driver’s eye point.

For the light intensity I of the small glare source area, according to the inverse square law, the relationship between light intensity and illuminance is as follows:

I=E×r ² (4)

Among them, I is the light intensity (cd) of the small glare source area on the reflective surface and the instrument panel in the direction of the train driver's line of sight; E is the illuminance (lx) of the small glare source area at the human eye; r is the geometry of the small glare source area The distance from the center to the human eye (m). The inverse square law is applicable to point light sources, but if the distance between the calculated point and the light source is greater than 4 times the diameter of the light source, the law is established. According to this, the illuminance of the light source on the illuminated surface (driver's eye point) is collected and then converted into luminous intensity.

For the distance r from the geometric center of the small glare source area to the eye point, calculate the coordinates of the geometric center of the light source, and use the GetDepth(X,Y) method in SPEOS CAA V5 Based V16.1.1 to collect the distance r from the geometric center of the small glare source area to the driver's eye point , the expression is:

$\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\sqrt{{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}_{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; Z</span>}}_{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

Among them: (X _q , Y _q , Z _q ) are the coordinates of the geometric center of the qth small glare source area, and (X _e , Y _e , Z _e ) are the coordinates of the driver's eye point.

For the position index P of the geometric center of the general glare source area or the geometric center of the small glare source area relative to the driver's eye point, the position index based on the research of Luchiesh and Guth is adopted, and there are many expressions, such as the position index table, the human eye and The angle between the light sources is used as a variable position index expression, etc. This embodiment adopts a kind of position index expression that is convenient for computer operation:

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; P</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; E.</span>}\mathrm{<span\; class="notranslate">\; x</span>}\mathrm{<span\; class="notranslate">\; P</span>}}{{\mathrm{<span\; class="notranslate">\; d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1.5</span>}\mathrm{<span\; class="notranslate">\; d</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 4.6</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 0.12</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; E.</span>}\mathrm{<span\; class="notranslate">\; x</span>}\mathrm{<span\; class="notranslate">\; P</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

Where: P is the position index of the geometric center of the glare source area; d=|Y/Z|; s=|X/Z|; X, Y, Z are the distances from the geometric center of the glare source area to the three coordinate axes, as shown in Figure 2.

The specific process of step Step6 is:

Input the parameter values collected by the above process and calculated by formulas (1) to (6) into the UGR model and small light source UGR correction model of this embodiment, and consider the glare distribution characteristics of the train driving interface to establish the uncomfortable glare of the train driving interface lighting Evaluate the model and calculate the UGR value of the uncomfortable glare of the driving interface lighting. The model formula is as follows:

$\mathrm{<span\; class="notranslate">\; u</span>}\mathrm{<span\; class="notranslate">\; G</span>}\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 8</span>}\mathrm{<span\; class="notranslate">\; l</span>}\mathrm{<span\; class="notranslate">\; o</span>}\mathrm{<span\; class="notranslate">\; g</span>}\frac{\mathrm{<span\; class="notranslate">\; 0.25</span>}}{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}<span\; class="notranslate">\; (</span>\underset{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; h</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; +</span>\underset{\mathrm{<span\; class="notranslate">\; q</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; Q</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{\mathrm{<span\; class="notranslate">\; 200</span>}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; P</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$

Among them: H is the total number of general glare source areas; Q is the total number of small glare source areas; L _h is the brightness value (cd/m2) of the hth general glare source area; L _b is the background brightness value of the image (cd/m2) m2); ω _h is the solid angle (sr) of the hth general glare source area; _Ph is the position index of the geometric center of the hth general glare source area; I _q is the qth small glare source area in the train driver's eyes The light intensity in the point direction (cd), r _q is the distance (m) between the qth small glare source area and the eye; P _q is the position index of the geometric center of the qth small glare source area.

Compare the calculated UGR value with the following "UGR and subjective feeling relationship table", and finally complete the evaluation of the lighting glare of the train driving interface.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those of ordinary skill in the art can also make It is impossible to exhaustively list all the implementation modes here, and any obvious changes or changes derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims (4)

1. an uncomfortable glare evaluation method of train driving interface illumination, it is characterized in that, the method comprises the steps: S1. Establish a three-dimensional model of the train driving interface, and obtain the driver's visual simulation image and the coordinate values, brightness values and illuminance value parameters of each pixel in the image through an optical simulation tool; S2. Determine the glare source pixel points from each pixel point according to the set determination conditions, and calculate the average value of the luminance values of the non-glare source pixel points in the image as the background luminance value; S3. Integrating the adjacent glare source pixels among the glare source pixels into one glare source area to obtain multiple glare source areas; S5. Divide each glare source area into a general glare source area and a small glare source area according to the size of the area, collect the luminance value, solid angle and position index of the geometric center of each general glare source area, and collect the luminous intensity of each small glare source area , the distance from the geometric center to the train driver's eye point and the position index of the geometric center; S6. Calculate the unified glare value UGR of the image according to the uncomfortable glare evaluation model of the train driving interface lighting, and evaluate the uncomfortable glare of the train driving interface lighting according to the unified glare value. The model formula of the uncomfortable glare evaluation model of the train driving interface lighting is: : $\mathrm{<span\; class="notranslate">\; u</span>}\mathrm{<span\; class="notranslate">\; G</span>}\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 8</span>}\mathrm{<span\; class="notranslate">\; l</span>}\mathrm{<span\; class="notranslate">\; o</span>}\mathrm{<span\; class="notranslate">\; g</span>}\frac{\mathrm{<span\; class="notranslate">\; 0.25</span>}}{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}}<span\; class="notranslate">\; (</span>\underset{\mathrm{<span\; class="notranslate">\; h</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; h</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{{{\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&omega;</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; h</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; +</span>\underset{\mathrm{<span\; class="notranslate">\; q</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; Q</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}\frac{\mathrm{<span\; class="notranslate">\; 200</span>}{\mathrm{<span\; class="notranslate">\; I</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; q</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; )</span>$ In the formula, H is the total number of general glare source areas; Q is the total number of small glare source areas; L _h is the brightness value of the hth general glare source area (cd/m2); L _b is the background brightness value of the image (cd /m2); ω _h is the solid angle (sr) of the hth general glare source area; _Ph is the position index of the geometric center of the hth general glare source area; I _q is the qth small glare source area in the train driver The light intensity in the line of sight (cd), r _q is the distance (m) between the qth small glare source area and the eye; P _q is the position index of the geometric center of the qth small glare source area. 2. The uncomfortable glare evaluation method of train driving interface lighting according to claim 1, characterized in that, after step S3 and before step S5, the following steps are also included: S4. Screen out the glare source area composed of no more than 2-10 glare source pixels. 3. The uncomfortable glare evaluation method of train driving interface lighting according to claim 1, wherein the judgment condition of the glare source pixel in step S2 is: the brightness value exceeds the average brightness value of all pixels in the image by 4 Pixels more than twice as glare source pixels. 4. The uncomfortable glare evaluation method of train driving interface lighting according to claim 1, characterized in that the method of dividing each glare source area into a general glare source area and a small glare source area according to the size of the area described in step S5 It is: the glare source area with a projected area greater than or equal to ^0.005m2 is regarded as a general glare source area, and the glare source area with a projected area less than ^0.005m2 is regarded as a small glare source area.