CN115495864A - Method and device for detecting brightness uniformity of signal lamps - Google Patents

Abstract

The application discloses a method and a device for detecting the brightness uniformity of a signal lamp, wherein the method comprises the following steps: the method comprises the following steps of (1) simulating a projection surface of a light emitting surface of a design signal lamp along a specific direction, and dividing the projection surface into a plurality of areas with the same shape; calculating the brightness values of a plurality of areas with the same shape, sequencing the areas from large to small according to the brightness values, and selecting the first M areas and the last N areas as test areas; wherein M and N are positive integers; and calculating brightness comparison values of every two areas in the M and N areas, and acquiring a detection result of the brightness uniformity of the signal lamp according to whether the brightness comparison values meet the preset requirement. By the method for calculating the brightness contrast value, the brightness uniformity of the signal lamp is subjectively evaluated without observing the sample piece by naked eyes, and the quantitative detection of the brightness uniformity of the signal lamp is realized.

Description

A method and device for detecting brightness uniformity of a signal lamp

technical field

The present application relates to the technical field of equipment detection, and in particular to a method and device for detecting brightness uniformity of signal lamps.

Background technique

Lighting and cars have become an inseparable whole. Lighting has not only become the signal language of the car, but also the embodiment of the driver's own taste. Car signal lights include front and rear position lights, daytime running lights, front and rear turn signals, brake lights, etc. Signal lights, as the language of a car while driving, have many other functions besides lighting warnings. With the development of the automobile industry, the shape design of automobile signal lights is becoming more and more beautiful. At the same time, the requirements for the uniformity of the brightness of automobile signal lights are also getting higher and higher. The better the uniformity of signal lights, the more it can improve the performance of car lights texture and usability.

At present, when manufacturers design automotive signal lights, they mainly rely on the design standards formed by the design experience of past products to meet the requirements of signal light brightness uniformity. There is a lack of quantifiable detection methods and evaluation methods.

Contents of the invention

Embodiments of the present application provide a method and device for detecting brightness uniformity of signal lamps, so as to realize quantitative detection of brightness uniformity of signal lamps.

In the first aspect, the embodiment of the present application provides a method for detecting the brightness uniformity of a signal lamp, the method comprising:

Simulating and designing the projection surface of the light-emitting surface of the signal lamp along a specific direction, and dividing the projection surface into a plurality of regions of the same shape;

Calculating the brightness values of the plurality of regions of the same shape, and sorting the plurality of regions of the same shape according to the brightness values from large to small, and selecting the first M regions and the last N regions as test regions; wherein, M and N are positive integers;

In the M and N areas, calculate the brightness contrast values of the two areas, and obtain the detection result of the brightness uniformity of the signal lamp according to whether the brightness contrast values meet the preset requirements;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

In some possible implementation manners, the regions of the same shape include:

A circle with a diameter of 5 mm or a square with a side length of 5 mm.

In some possible implementation manners, the selecting the first M regions and the last N regions as test regions includes:

The first area and the last area are selected as test areas; wherein, the first area is the area with the largest brightness value, and the last area is the area with the smallest brightness value.

In some possible implementation manners, the acquisition of the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements includes:

When the brightness contrast value is greater than or equal to 0.6, it means that the brightness uniformity of the signal lamp does not meet the requirements; when the brightness contrast value is less than or equal to 0.4, it means that the brightness uniformity of the signal lamp meets the requirements; , means to optimize according to the requirement of signal light brightness uniformity.

In some possible implementation manners, the calculating the brightness contrast value of any two regions includes:

Calculate the brightness contrast value of all pairwise regions.

In some possible implementation manners, the acquisition of the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements includes:

When there is a brightness contrast value greater than or equal to 0.6, it means that the brightness uniformity of the signal light does not meet the requirements; when all the brightness contrast values are less than or equal to 0.4, it means that the brightness uniformity of the signal light meets the requirements; when there is a brightness contrast value greater than 0.4 and less than When it is 0.6, it means that it is optimized according to the requirement of the brightness uniformity of the signal light.

In the second aspect, an embodiment of the present application provides a device for detecting brightness uniformity of a signal lamp, the device comprising:

The simulation module is used to simulate the projection surface of the light-emitting surface of the design signal lamp along a specific direction, and divide the projection surface into a plurality of regions of the same shape;

A calculation module, configured to calculate the brightness values of the multiple areas of the same shape, and sort the multiple areas of the same shape according to the brightness values from large to small, and select the first M areas and the last N areas as tests area; wherein, M and N are positive integers; in the M and N areas, calculate the brightness contrast value of two areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

In the third aspect, the embodiment of the present application also provides a device for detecting the brightness uniformity of signal lamps, the device includes a processor and a memory:

The memory is used to store related program codes;

The processor is configured to call the program code to execute the method for detecting brightness uniformity of signal lamps according to any one of the implementation manners of the first aspect above.

In the fourth aspect, the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium is used to store a computer program, and the computer program is used to execute any one of the implementation manners of the above-mentioned first aspect. The detection method of signal light brightness uniformity.

In the above-mentioned implementation method provided by the embodiment of the present application, software simulation is first used to design the projection surface of the light-emitting surface of the signal lamp along a specific direction, and divide the projection surface into a plurality of regions of the same shape; calculate the divided regions of the same shape luminance value, and the above-mentioned multiple areas of the same shape are sorted according to the luminance value from large to small, and the first M areas and the last N areas are selected as test areas; where M and N are positive integers; in the selected M and in N areas, calculate the brightness contrast value of two or two areas, and obtain the detection result of the brightness uniformity of the signal lamp according to whether the brightness contrast value meets the preset requirements; the calculation method of the brightness contrast value of the two or two areas is the first The ratio of the difference between the luminance values of the area and the second area to the luminance value of the first area, wherein the luminance value of the first area is greater than the luminance value of the second area. The technical solution provided by the embodiment of the present application does not need to subjectively evaluate the brightness uniformity of the signal lamp by observing the sample with the naked eye, and can realize the quantitative detection of the brightness uniformity of the signal lamp by using the method of calculating the brightness contrast value.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments provided by the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings.

Fig. 1 is the flow chart of the method for realizing the brightness uniformity detection of signal lights in the embodiment of the present application;

FIG. 2 is a flow chart of a method for detecting the brightness uniformity of signal lamps in another embodiment of the present application;

Fig. 3 is a schematic diagram of the signal lamp projection surface in the embodiment of the present application;

Fig. 4 is a schematic diagram of the test area of the signal lamp projection surface in the embodiment of the present application;

FIG. 5 is a flow chart of a method for detecting the brightness uniformity of signal lamps in another embodiment of the present application;

FIG. 6 is a schematic diagram of a signal light projection surface in another embodiment of the present application;

FIG. 7 is a flowchart of a method for detecting the brightness uniformity of signal lamps in another embodiment of the present application;

Fig. 8 is a schematic diagram of the test area of the signal lamp projection surface in another embodiment of the present application;

FIG. 9 is a schematic diagram of a signal light projection surface in another embodiment of the present application;

FIG. 10 is a flow chart of a method for detecting the brightness uniformity of signal lamps in another embodiment of the present application;

Fig. 11 is a schematic diagram of the test area of the signal lamp projection surface in another embodiment of the present application;

FIG. 12 is a structural diagram of a device for detecting the brightness uniformity of signal lamps in the embodiment of the present application;

FIG. 13 is a structural diagram of a device for detecting the brightness uniformity of signal lamps in another embodiment of the present application.

detailed description

At present, in order to meet the design of the uniformity of the brightness of automobile signal lights, manufacturers mainly rely on the standards formed by the design experience of past products. When testing the effect of brightness uniformity of signal lights, it is also necessary to observe the samples with the naked eye for subjective evaluation. There is a lack of quantifiable The simulation detection method and evaluation method.

Based on this, an embodiment of the present application provides a method for detecting brightness uniformity of a signal lamp, so as to realize quantitative detection of brightness uniformity of a signal lamp. First, use software simulation to design the projection surface of the light-emitting surface of the signal lamp along a specific direction, and divide the projection surface into multiple areas of the same shape; calculate the brightness values of the divided areas of the same shape, and divide the above-mentioned multiple The regions are sorted according to the brightness value from large to small, and the first M regions and the last N regions are selected as the test regions; where M and N are positive integers; in the selected M and N regions, calculate the Brightness contrast value, according to whether the brightness contrast value meets the preset requirements to obtain the detection result of the brightness uniformity of the signal lamp; the calculation method of the brightness contrast value of the two regions is the difference between the brightness values of the first region and the second region The ratio to the brightness value of the first region, where the brightness value of the first region is greater than the brightness value of the second region. The technical solution provided by the embodiment of the present application does not need to subjectively evaluate the brightness uniformity of the signal lamp by visually observing the sample, and realizes the quantitative detection of the brightness uniformity of the signal lamp by using the method of calculating the brightness contrast value.

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The described embodiments are only exemplary implementations of the present application, not all implementations. Those skilled in the art may combine the embodiments of the present application to obtain other embodiments without performing creative work, and these embodiments are also within the protection scope of the present application.

In this embodiment of the present application, the optical software SPEOS is used to simulate the design of signal lamps and detect the brightness uniformity of signal lamps. Within the protection scope of this application. As an optical system simulation tool, SPEOS can realize from system structure design to optical simulation design, mainly used in optical design, environment and visual simulation, imaging simulation, etc. SPEOS takes accurate optical property measurement results as software input, and Real-world scene simulation can be carried out based on the visual characteristics of the human eye and the real physical properties of objects, effectively guiding product development and design.

Referring to Fig. 1, Fig. 1 shows a flow chart of a method for detecting the brightness uniformity of signal lamps, which can realize quantitative detection of the brightness uniformity of signal lamps. The method specifically includes the following steps:

S101: Simulate and design the projection surface of the light-emitting surface of the signal lamp along a specific direction, and divide the projection surface into a plurality of regions of the same shape;

The optical software SPEOS can be used to simulate the projection surface of the light-emitting surface of the car signal lamp along a specific direction. According to the different viewing angles, the projection surface is also different, such as the projection surface along the rear or outside 45-degree direction of the taillight of the car. Then use software to divide the projection surface into multiple fixed-shaped areas, for example, the projection surface can be divided into multiple circles with a diameter of 5mm or squares with a side length of 5mm.

S102: Calculating the brightness values of the plurality of regions of the same shape, and sorting the plurality of regions of the same shape according to the brightness values from large to small, and selecting the first M regions and the last N regions as test regions; wherein , M and N are positive integers;

After dividing the projection surface into multiple fixed-shaped areas, use the MEASURE measurement tool of SPEOS software to calculate the brightness value of each divided area, sort each area according to the brightness value from large to small, and then select the top M The region and the last N regions are used as regions for testing, wherein M and N are positive integers, and M and N can be the same value or different values. For example, when the value of M is 5 and the value of N is 4, it means that the areas with the top 5 luminance values and the areas with the last 4 luminance values are selected as the test areas for detecting the luminance uniformity of signal lamps.

S103: In the M and N areas, calculate the brightness contrast values of the pairwise areas, and obtain the detection result of the brightness uniformity of the signal lamp according to whether the brightness contrast values meet the preset requirements; wherein, the brightness of the pairwise areas The calculation method of the contrast value is the ratio of the difference between the brightness values of the first area and the second area to the brightness value of the first area, and the brightness value of the first area is greater than the brightness value of the second area.

After using the software to divide the projection surface of the simulation design into fixed-shaped areas, select the first M areas and the reciprocal N areas of the brightness value as the test area, and then select two areas in the selected M and N areas to calculate Their brightness contrast values, according to whether the brightness contrast values meet the preset requirements, the detection result of the uniformity of the signal lights is obtained. For example, when the value of M is 5 and the value of N is 4, the first 5 areas with brightness values and the area with the last 4 brightness values are selected. Among these 9 areas, two areas are selected each time, and the calculated The brightness contrast value of the two areas, until the calculation of the brightness contrast value of all pairwise areas is completed, and the detection result of the brightness uniformity of the signal light is obtained according to whether the calculated brightness contrast value meets the preset requirements. Through this calculation method, the quantitative detection of the brightness uniformity of the signal lamp is realized, and the inspector does not need to make a sample, and subjectively evaluates the brightness uniformity of the signal lamp through naked eye observation.

In the embodiment of the present application, in step S103, according to whether the calculated brightness contrast value meets the preset requirements, the detection result of the brightness uniformity of the signal light is obtained, which means that the calibration value of the brightness contrast value can be set in advance, and the calculated brightness contrast value and The preset calibration value is compared to obtain the detection result of the brightness uniformity of the signal lamp. In the embodiment of this application, it is set that when the brightness contrast value of the two areas is less than or equal to 0.4, it meets the requirements for the brightness uniformity of the signal lamp; when the brightness contrast value of the two areas is greater than or equal to 0.6, it indicates that the brightness of the two areas If the value difference does not meet the requirements, then the brightness uniformity of the signal lamp does not meet the requirements; when the brightness contrast value of the two areas is greater than 0.4 and less than 0.6, decide whether to optimize the brightness uniformity of the signal lamp according to specific needs. If the requirements on the brightness uniformity of the signal lamp are high, then the brightness contrast value greater than 0.4 and less than 0.6 is not in compliance with the requirements, and the brightness uniformity of the signal lamp needs to be optimized; if the requirements on the brightness uniformity are not so strict, the brightness contrast can be allowed Values are greater than 0.4 and less than 0.6, that is, it is not necessary to optimize the brightness uniformity of the signal lamp.

When calculating the brightness contrast value of two-two areas, since as long as there is a brightness contrast value greater than or equal to 0.6, the brightness uniformity of the signal light does not meet the requirements, so when the brightness contrast value of a pair-by-two area is calculated to be greater than or equal to 0.6, It means that the brightness uniformity of the signal light does not meet the requirements, and it is not necessary to calculate the brightness contrast value of the other two areas, thereby ending the detection process of the brightness uniformity of the signal light in advance, avoiding unnecessary waste of the calculation process, and improving detection efficiency. Therefore, preferably, it is only necessary to find two areas with the largest brightness contrast values, and calculate whether the brightness contrast values of these two areas meet the preset requirements, and then it can be known whether the brightness uniformity of the signal lamp meets the requirements. Therefore, Fig. 2 shows a flow chart of a method for detecting the brightness uniformity of signal lamps, and the method specifically includes the following steps:

S201: Simulate and design the projection surface of the light-emitting surface of the signal lamp along a specific direction, and divide the projection surface into a plurality of circles with a diameter of 5 mm;

After using the SPEOS software to simulate and design the projection surface of the light-emitting surface of the signal lamp along a specific direction, the projection surface can be divided into multiple circles with a diameter of 5mm or squares with a side length of 5mm. See Figure 3. In the embodiment of this application, The projection plane is divided into a plurality of circles with a diameter of 5 mm.

S202: Calculate brightness values of the plurality of circular areas, and sort the circular areas according to brightness values from large to small;

After dividing the projection surface into circular areas with a diameter of 5mm, SPEOS can be used to calculate the brightness value of the circular area, and sort the circular areas according to the brightness value from large to small;

S203: Calculate the brightness contrast value of the area with the largest brightness value and the area with the smallest brightness value, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements; wherein, the calculation method of the brightness contrast value is: The ratio of the brightness difference between the area with the largest brightness value and the area with the smallest brightness value to the brightness value of the area with the largest brightness value.

In order to find the two regions with the largest luminance contrast value, first select the top several regions of luminance value and the several regions with the lowest luminance value as test regions. In the embodiment of this application, the top 5 regions of luminance value can be selected, denoted as a , b, c, d, and e are marked in descending order of luminance values, that is, a has the largest luminance value, and e has the smallest luminance value among these 5 areas. Select the 5 areas with the lowest luminance value and record it as f , g, h, i, and j are also marked in descending order of luminance values, that is, f has the largest luminance value in these five areas, and j has the smallest luminance value. The specific example of the selected area is shown in Figure 4.

After marking and distinguishing the test area, taking area a and area b as an example, the luminance value of area a is recorded as La, and the luminance value of area b is recorded as Lb, so the formula for calculating the brightness contrast value of the two areas is (La-Lb )/La, and the larger the brightness contrast value of the two areas, the higher the possibility of not conforming to the uniformity of the brightness of the signal lamp. In the embodiment of this application, select an area inside areas a, b, c, d, and e, and select an area inside areas f, g, h, i, and j to obtain the brightness contrast of all possible pairwise areas value. It is inferred that the brightness contrast value of region a and region j is greater than the brightness contrast value of region a and region f, similarly, the brightness contrast value of region b and region j is greater than the brightness contrast value of region b and region f, and region a The brightness contrast value of region j is greater than the brightness contrast value of region b and region j, that is, (La-Lj)/La>(Lb-Lj)/Lb, and so on, it can be known that in this way of selecting regions , the maximum brightness contrast value is the brightness contrast value of region a and region j, namely (La-Lj)/La.

In another case, two areas are selected in areas a, b, c, d, and e to calculate the brightness contrast value. It is inferred that the brightness contrast value of all pairwise areas is the largest between the area a and the area e. , that is (La-Le)/La. Similarly, within regions f, g, h, i, j, the brightness contrast value with the largest brightness contrast value is the brightness contrast value of region f and region j, that is, (Lf-Lj)/Lf. It is also deduced that the brightness contrast value of region a and region j is greater than the brightness contrast value of region a and region e, that is, (La-Lj)/La>(La-Le)/La, and then the region a and region j Comparing the brightness contrast value with the brightness contrast value of area f and area j, it can be known that the brightness contrast value of area a and area j is greater than the brightness contrast value of area f and area j, that is, (La-Lj)/La>(Lf -Lj)/Lf, therefore, the brightness contrast value of the two regions with the largest brightness contrast value is the brightness contrast value of region a and region j. Therefore, in order to more efficiently judge whether the uniformity of the signal lamp meets the requirements, it is possible to only calculate the brightness contrast value between the area a and the area j, that is, (La-Lj)/La. Since the brightness contrast value of the region with the maximum brightness value and the region with the minimum brightness value is the largest, if the calculated brightness contrast value is greater than or equal to 0.6, then the brightness uniformity of the signal lamp does not meet the requirements; if the calculated brightness contrast value is less than or equal to 0.4, then the brightness contrast value of the other two areas must also be less than or equal to 0.4, so the brightness uniformity of the signal light meets the requirements; if the calculated brightness contrast value is greater than 0.4 and less than 0.6, it is determined according to specific needs. The brightness uniformity of the signal light is optimized, so that the calculation of the brightness contrast value of other test areas can no longer be performed, and the calculation process is reduced.

In practical applications, technicians detect the brightness uniformity of signal lamps, which is also for the convenience of subsequent optimization and rectification of parts that do not meet the uniformity requirements. Therefore, by selecting multiple test areas and calculating the brightness comparison values of all pairwise areas, not only It can be known whether the brightness uniformity of the signal lamp meets the requirements, and the position of the test area whose brightness contrast value does not meet the requirements can be found from an overall perspective, which is convenient for subsequent technicians to rectify and optimize the brightness uniformity of the signal lamp. Referring to FIG. 5 , it shows a flow chart of a method for detecting the uniformity of brightness of signal lamps. The method specifically includes the following steps:

S501: Simulating and designing the projection surface of the light-emitting surface of the signal lamp along a specific direction, and dividing the projection surface into a plurality of circles with a diameter of 5 mm;

S502: Calculate the luminance values of the plurality of circular areas, sort the circular areas according to the luminance values from large to small, and select the first 5 circular areas and the last 5 circular areas of luminance values as test areas ;

After dividing the projection surface into circular areas with a diameter of 5mm, you can use SPEOS to calculate the brightness value of the circular area, and sort the circular areas according to the brightness value from large to small, and select the first few areas of brightness value and The last few areas of the luminance value are used as the test area for the subsequent detection of the uniformity of the luminance of the signal lamp. In the embodiment of this application, the first 5 areas of brightness value can be selected, marked as a, b, c, d, and e, and marked in order of brightness value from large to small, that is, the brightness value of a is the largest, and e is in this The brightness value is the smallest among the five regions. Select the last 5 areas of luminance value, denoted as f, g, h, i, and j, and also mark them in order of luminance value from large to small, that is, f has the largest luminance value in these 5 areas, and j has the smallest luminance value, A specific example of the selected area is shown in Figure 4.

S503: In the 10 circular areas, calculate the brightness contrast values of all pairwise areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast values meet the preset requirements;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

After marking and distinguishing the test areas, it is necessary to calculate the brightness contrast values of all pairwise areas. In the specific implementation, after selecting the test area, you can select two areas each time, and calculate the brightness contrast values of these two areas until the calculation Completing the brightness contrast values of all pairwise areas; or through a calculation program of the software, the brightness contrast values of all pairwise areas in the test area can be calculated in one process, so as to improve the operating efficiency of the calculation method.

When there is a brightness contrast value greater than or equal to 0.6, it means that the brightness contrast value does not meet the requirements, and it also means that the brightness uniformity of the signal lamp does not meet the requirements. If the requirements for the brightness uniformity of the signal lamp are relatively high, then the brightness contrast value greater than 0.4 and less than 0.6 is not in line with the requirements, so in this case, as long as there is a brightness contrast value greater than 0.4 and less than 0.6, it also means that the signal lamp The brightness uniformity of the signal lamp does not meet the requirements. In other words, the brightness uniformity of the signal lamp meets the requirements only when the brightness contrast values of all pairwise areas are less than or equal to 0.4. On the other hand, if the requirements on the brightness uniformity of signal lamps are not so strict, it is allowed to meet the brightness uniformity requirements of signal lamps when the brightness contrast value is greater than 0.4 and less than 0.6. In this case, the brightness contrast values of all pairwise areas are equal When it is less than 0.6, the brightness uniformity of the signal lamp meets the requirements, but as long as there is a brightness contrast value greater than or equal to 0.6, the brightness uniformity of the signal lamp does not meet the requirements.

Corresponding to the calculation result of the brightness contrast value, another table representing the detection result can be output, so as to visually check whether the calculated brightness contrast value meets the requirements. For example, when the brightness contrast value of any two areas is greater than or equal to 0.6, the corresponding position of the test result table is marked as "unqualified"; when the brightness contrast value is less than or equal to 0.4, the corresponding position of the test result table is marked as "qualified" ; When the brightness contrast value is greater than 0.4 and less than 0.6, the corresponding position of the detection result table is marked as "on-demand optimization", thereby obtaining the detection result table.

After the brightness contrast values of all pairwise regions are calculated, the calculated brightness contrast values may also be identified by color, so as to visually distinguish whether the brightness contrast values meet the preset requirements. In the implementation method provided by the embodiment of this application, the brightness contrast value greater than or equal to 0.6 can be marked with red, indicating that the red brightness contrast value does not meet the requirements for the brightness uniformity of the signal lamp, that is, the brightness uniformity of the signal lamp does not meet the requirements ; Use green to mark the brightness contrast value less than or equal to 0.4, indicating that the green brightness contrast value meets the requirements for the brightness uniformity of the signal light; use yellow to mark the brightness contrast value greater than 0.4 and less than 0.6, indicating whether it is necessary to optimize the signal light according to specific needs Brightness uniformity, and finally a table of color-marked brightness contrast values can be output.

The detection results of the brightness uniformity of automobile signal lamps can be output in the form of text, and can also be output in ways such as alarming. When the test result of the brightness uniformity of the signal lamp does not meet the requirements, a buzzer alarm or a pop-up prompt box can be used to prompt, indicating that the brightness uniformity of the signal lamp does not meet the requirements, so that it is convenient to select the signal lamps that do not meet the requirements. The above-mentioned output form of the detection result of the brightness uniformity of the signal light is only an exemplary implementation manner, and any other output form will not affect the implementation of the embodiment of the present application.

The technical solution of the embodiment of the present application will be described in detail below in conjunction with a specific application scenario. Referring to FIG. It is a square with a side length of 5mm. In order to facilitate subsequent technicians to rectify the test results of the uniformity of the brightness of the taillights, the embodiment of this application selects the top 5 areas of brightness value and the bottom 5 areas as the test area. , the flow diagram of the method is shown in Figure 7, which specifically includes the following steps:

S701: Simulating and designing the projection surface of the automobile taillight along the rear, and dividing the projection surface into a plurality of squares with a side length of 5 mm;

Fig. 6 is the projection surface of the automobile taillight along the rear angle of the simulated design using SPEOS software, and then the projection surface is divided into a plurality of squares with a side length of 5mm.

S702: Calculate the luminance values of the multiple square areas with a side length of 5 mm, sort the multiple square areas according to the luminance values from large to small, and select the first 5 areas and the last 5 areas of luminance values as tests area;

After calculating the luminance values of the divided square areas, select the top 5 square areas with luminance values, mark them as a, b, c, d, and e according to the luminance values from large to small, and select the bottom 5 of the luminance values The regions are marked as f, g, h, i, and j according to the brightness value from large to small, as shown in Figure 8.

S703: In the selected 10 areas, calculate the brightness contrast values of all pairwise areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast values meet the preset requirements;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

In the selected 10 regions, the luminance value corresponding to region a is denoted as La, and similarly, the expression forms of luminance values in other regions can be obtained. Calculate the brightness contrast value of any two areas, taking area a and area b as an example, the formula for calculating the brightness contrast value is (La-Lb)/La. Output the calculated brightness contrast values of all pairwise areas in the form of a table. In the table, the brightness values of 10 test areas are used as row headers and column headers, and the value of each cell indicates the row and column area. In the embodiment of the present application, the results of the brightness contrast values of all pairwise areas in the 10 test areas are shown in Table 1.

Table 1 Calculation results of brightness contrast value

Corresponding to the calculation result of the brightness contrast value, a table representing the detection result can be output. When the brightness contrast value of any two areas is greater than or equal to 0.6, the corresponding position of the detection result table is marked as "unqualified"; when the brightness contrast value is less than or equal to 0.4, the corresponding position of the test result table is marked as "qualified"; when the brightness contrast value is greater than 0.4 and less than 0.6, the corresponding position of the test result table is marked as "on-demand optimization". It can be known from Table 1 that all brightness contrast values are less than 0.4, indicating that the brightness uniformity of the signal lamp meets the requirements, and the tables corresponding to the test results are marked as "qualified", as shown in Table 2.

Table 2 Test results

La Lb Lc Ld Le Lf LG Lh Li Lj Lj qualified qualified qualified qualified qualified qualified qualified qualified qualified Li qualified qualified qualified qualified qualified qualified qualified qualified Lh qualified qualified qualified qualified qualified qualified qualified LG qualified qualified qualified qualified qualified qualified Lf qualified qualified qualified qualified qualified Le qualified qualified qualified qualified Ld qualified qualified qualified Lc qualified qualified Lb qualified La

In addition, the calculated brightness contrast value can also be marked by color, and the brightness contrast value greater than or equal to 0.6 can be marked by red; the brightness contrast value of less than or equal to 0.4 can be marked by green; , indicating whether to optimize the brightness uniformity of the signal light according to specific requirements, and finally output a table of color-coded brightness contrast values. The output form of the above-mentioned brightness contrast value detection results is only an exemplary implementation, and any other output forms are not applicable. Affects the realization of the embodiment of the present application, and details are not described here.

The technical solution of the embodiment of the present application can also be applied to another specific application scenario. Referring to FIG. Divide it into multiple squares with a side length of 5mm. In order to facilitate subsequent technicians to rectify the test results of the uniformity of the brightness of the taillights of automobiles, in the embodiment of this application, select the top 5 areas of brightness value and the bottom 5 areas. The area is used as the test area, and the flow diagram of the method is shown in Figure 10, which specifically includes the following steps:

S1001: Simulating and designing a 45-degree projection surface on the outside of the automobile taillight, and dividing the projection surface into a plurality of squares with a side length of 5 mm;

Referring to FIG. 9 , the projection surface of the taillight of the automobile designed by using the SPEOS software simulation along the rear angle, and then the projection surface is divided into a plurality of squares with a side length of 5 mm.

S1002: Calculate the luminance values of the multiple square areas with a side length of 5 mm, sort the multiple square areas according to the luminance values from large to small, and select the first 5 areas and the last 5 areas of luminance values as tests area;

After calculating the luminance values of the divided square areas, select the top 5 square areas with luminance values, mark them as a, b, c, d, and e according to the luminance values from large to small, and select the bottom 5 of the luminance values The regions are marked as f, g, h, i, and j according to the brightness value from large to small, as shown in Figure 11.

S1003: In the selected 10 areas, calculate the brightness contrast values of all pairwise areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast values meet the preset requirements;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

Output the calculated brightness contrast values of all pairwise areas in the form of a table. In the table, the brightness values of 10 test areas are used as row headers and column headers, and the value of each cell indicates the corresponding row and column. The brightness contrast value of the area, in the embodiment of the present application, the results of the brightness contrast value of all pairwise areas in the 10 test areas are shown in Table 3.

Table 3 Calculation results of brightness contrast value

Corresponding to the calculation result of the brightness contrast value, a table representing the detection result can be output. When the brightness contrast value of any two areas is greater than or equal to 0.6, the corresponding position of the detection result table is marked as "unqualified"; when the brightness contrast value is less than or equal to 0.4, the corresponding position of the test result table is marked as "qualified"; when the brightness contrast value is greater than 0.4 and less than 0.6, the corresponding position of the test result table is marked as "on-demand optimization", and the test results are shown in Table 4. Since there is a brightness contrast value greater than or equal to 0.6, the brightness uniformity of the signal lamp does not meet the requirements. Subsequent technicians can optimize the signal lamp according to the test area that does not meet the brightness uniformity requirements.

Table 4 Test results

In addition, the calculated brightness contrast value may also be marked by color, which is the same as the method described in Embodiment 7, and will not be repeated here. It should be noted that the above application scenarios are only two examples of application scenarios in the embodiment of the present application, and are not limited to the application scenarios provided above.

In addition, the embodiment of the present application provides a device for detecting the brightness uniformity of signal lamps, see Figure 12, which shows a schematic structural diagram of the device, and the device 1200 specifically includes:

The simulation module 1201 is used to simulate the projection surface of the light-emitting surface of the designed signal lamp along a specific direction, and divide the projection surface into multiple regions of the same shape;

Calculation module 1202, configured to calculate brightness values of the plurality of regions of the same shape, and sort the plurality of regions of the same shape in descending order of brightness values, and select the first M regions and the last N regions as Test area; wherein, M and N are positive integers; in the M and N areas, calculate the brightness contrast value of two areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements ;

Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area.

The embodiment of the present application also provides a device for detecting the brightness uniformity of signal lamps. Referring to FIG. 13, FIG. 13 shows a schematic structural diagram of the device. The device 1300 specifically includes a processor 1301 and a memory 1302:

The memory 1302 is used to store related program codes;

The processor 1301 is configured to call the program code to execute the method for remotely upgrading firmware of the electronic control unit described in the method embodiment.

In addition, an embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium is used to store a computer program, and the computer program is used to perform the remote upgrade of the electronic control unit described in the above-mentioned method embodiment firmware method.

Each embodiment in this specification focuses on the difference from other embodiments, and the similar parts between the various embodiments can be referred to each other, especially for the device embodiment, because it is basically similar to the method embodiment , so the description is relatively simple, for relevant parts, please refer to the descriptions of the method embodiments. The device embodiments described above are only illustrative, and the modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place , or may also be distributed to multiple network elements, and some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.

The above descriptions are only exemplary embodiments of the present application, and do not limit the present application in any form. Equivalent changes or modifications made to the above embodiments all belong to the protection scope of the present application.

Claims (9)

1. A method for detecting signal lamp brightness uniformity, characterized in that the method comprises: Simulating and designing the projection surface of the light-emitting surface of the signal lamp along a specific direction, and dividing the projection surface into a plurality of regions of the same shape; Calculating the brightness values of the plurality of regions of the same shape, and sorting the plurality of regions of the same shape according to the brightness values from large to small, and selecting the first M regions and the last N regions as test regions; wherein, M and N are positive integers; In the M and N areas, calculate the brightness contrast values of the two areas, and obtain the detection result of the brightness uniformity of the signal lamp according to whether the brightness contrast values meet the preset requirements; Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area. 2. The method according to claim 1, wherein the regions of the same shape comprise: A circle with a diameter of 5 mm or a square with a side length of 5 mm. 3. The method according to claim 1, wherein said selecting the first M regions and the rear N regions as test regions comprises: The first area and the last area are selected as test areas; wherein, the first area is the area with the largest brightness value, and the last area is the area with the smallest brightness value. 4. The method according to claim 3, characterized in that, the acquisition of the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements comprises: When the brightness contrast value is greater than or equal to 0.6, it means that the brightness uniformity of the signal lamp does not meet the requirements; when the brightness contrast value is less than or equal to 0.4, it means that the brightness uniformity of the signal lamp meets the requirements; , means to optimize according to the requirement of signal light brightness uniformity. 5. The method according to claim 1, wherein said calculating the brightness contrast values of any two regions comprises: Calculate the brightness contrast value of all pairwise regions. 6. The method according to claim 5, characterized in that the obtaining the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements comprises: When there is a brightness contrast value greater than or equal to 0.6, it means that the brightness uniformity of the signal light does not meet the requirements; when all the brightness contrast values are less than or equal to 0.4, it means that the brightness uniformity of the signal light meets the requirements; when there is a brightness contrast value greater than 0.4 and less than When it is 0.6, it means that it is optimized according to the requirement of the brightness uniformity of the signal light. 7. A signal light brightness uniformity detection device, characterized in that the device comprises: The simulation module is used to simulate the projection surface of the light-emitting surface of the design signal lamp along a specific direction, and divide the projection surface into a plurality of regions of the same shape; A calculation module, configured to calculate the brightness values of the multiple areas of the same shape, and sort the multiple areas of the same shape according to the brightness values from large to small, and select the first M areas and the last N areas as tests area; wherein, M and N are positive integers; in the M and N areas, calculate the brightness contrast value of two areas, and obtain the detection result of the brightness uniformity of the signal light according to whether the brightness contrast value meets the preset requirements; Wherein, the calculation method of the brightness contrast value of the two regions is the ratio of the difference between the brightness values of the first region and the second region to the brightness value of the first region; the brightness value of the first region is greater than the brightness value of the second region. The brightness value of the second area. 8. A signal light brightness uniformity detection device, characterized in that the device includes a processor and a memory: The memory is used to store related program codes; The processor is used to call the program code to execute the method according to any one of claims 1 to 6. 9. A computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, and the computer program is used to execute the method according to any one of claims 1 to 6.

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