Methods, apparatus, storage media, and systems for testing the illuminance of luminaires

Abstract

This invention relates to a method, apparatus, storage medium, and system for testing the illuminance of luminaires. The method includes: obtaining the total angle 2θ of the luminous intensity of a luminaire diffuser plate at a specific percentage peak luminous intensity; obtaining the critical angle of the luminaire diffuser plate at the current peak luminous intensity for illuminance level A or AA according to the diffuser plate diffusion characteristic formula; and comparing the total angle 2θ of the luminous intensity with the critical angle to determine whether the current luminaire diffuser plate meets the illuminance level A or AA. By comparing the total angle of the luminous intensity with the critical angle, the level of the luminaire diffuser plate can be quickly evaluated, solving the problems of existing luminaire rating methods wasting a lot of time, manpower, and resources, and having a high degree of blindness.

Description

Technical Field

[0001] This invention relates to the field of lighting fixtures, and in particular to a method, apparatus, storage medium, and system for testing the illuminance of lighting fixtures. Background Technology

[0002] To meet A / AA level illuminance requirements, most luminaires currently utilize either direct emission via a light source and diffuser plate, or side emission via a light source, light guide plate, and diffuser plate. Regardless of whether it's direct or side emission, the diffuser plate is the core component; its diffusion characteristics determine the overall light distribution of the luminaire, while the size of the diffusing particles and the concentration of the diffusing agent determine the extent of its diffusion effect. Achieving A / AA level illuminance requires not only a certain luminous flux but also a certain degree of uniformity. A diffuser plate with too strong or too weak a diffusion capacity will not meet A / AA level illuminance requirements; only with a moderate diffusion effect can an A / AA illuminance distribution be achieved.

[0003] Currently, most methods on the market fall into two categories. The first involves cutting a diffuser plate to a specified size. The diffuser plate contains diffusing particles inside and on its surface. This diffuser plate is then installed inside the lamp fixture, and the illuminance of the lamp point is tested to assess whether it meets A / AA standards. The second method uses injection molding, mixing transparent PC and milky white particles in a specific ratio to create a molded material that meets the specified requirements. This material is then installed on the lamp fixture and tested to assess whether it meets A / AA standards. The drawback of both methods is that if the test results meet the requirements, all is well; otherwise, if not, it is necessary to continuously change materials and conduct repeated experiments until the requirements are met.

[0004] This application aims to establish a systematic solution for testing the illuminance of luminaires and its implementation system. Summary of the Invention

[0005] In order to achieve the above-mentioned objectives and other advantages of the present invention, a first objective of the present invention is to provide a method for testing the illuminance of a luminaire, comprising the following steps:

[0006] Obtain the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity;

[0007] The critical angle of the luminaire diffuser plate at the current peak luminous intensity A or AA level illuminance is obtained based on the diffusion characteristic formula of the diffuser plate.

[0008] Compare the total angle of light intensity 2θ with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

[0009] Preferably, the light intensity full angle 2θ = 2 × arccos(X) 1 / n ), where X is the percentage of peak light intensity.

[0010] Preferably, the light intensity full angle 2θ of the luminaire diffuser is obtained through a BSDF file.

[0011] Preferably, the BSDF file includes light intensity full angle 2θ or light intensity angle θ at different percentages of peak light intensity.

[0012] Preferably, the method further includes the step of:

[0013] Substitute the corresponding X and 2θ in the BSDF file into the formula for calculating the full angle of light intensity and n to calculate the coefficient n under the current specific percentage of peak light intensity;

[0014] Substitute the coefficient n into the formula relating luminous flux Φ and n to calculate the luminous flux Φ.

[0015] The luminous flux Φ is compared with the minimum luminous flux under Class A or AA illuminance to determine whether the luminaire meets Class A or AA illuminance requirements.

[0016] Preferably, the diffusion characteristic formula of the diffuser plate is: I = I0 × COS(θ) n Formula 1)

[0017] Where I is the light intensity in the specified direction, I0 is the light intensity at the center, θ is the angle between the specified direction and the center direction, and n>0.

[0018] A second objective of this invention is to provide a lamp illuminance testing device, comprising:

[0019] The acquisition unit is configured to acquire the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity;

[0020] The processing unit is configured to obtain the critical angle of the luminaire diffuser plate at the current peak illuminance level A or AA based on the diffusion characteristic formula of the diffuser plate.

[0021] The judgment unit is configured to compare the size of the full angle 2θ of the light intensity with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

[0022] A third objective of the present invention is to provide a lamp illuminance testing device, comprising: a memory storing program code thereon; and a processor connected to the memory, which, when the program code is executed by the processor, implements the method described above.

[0023] A fourth objective of this invention is to provide a computer-readable storage medium having program instructions stored thereon, which, when executed, implement the lamp illuminance testing method described above.

[0024] A fifth objective of this invention is to provide a luminaire illuminance testing system, comprising: the luminaire illuminance testing device as described above; and a display connected to the diffused illuminance design selection device.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention provides a method, apparatus, storage medium, and system for testing the illuminance of luminaires. The method includes: obtaining the total angle 2θ of the luminous intensity of a luminaire diffuser plate at a specific percentage of peak luminous intensity; obtaining the critical angle of the luminaire diffuser plate at the current peak luminous intensity for illuminance level A or AA based on the diffuser plate diffusion characteristic formula; and comparing the total angle 2θ of the luminous intensity with the critical angle to determine whether the current luminaire diffuser plate meets the illuminance level A or AA. By comparing the total angle of the luminous intensity with the critical angle, the level of the luminaire diffuser plate can be quickly evaluated, solving the problems of existing luminaire rating methods wasting a lot of time, manpower, and resources, and having a high degree of blindness.

[0027] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 A flowchart of a method for testing the illuminance of a luminaire;

[0030] Figure 2 A flowchart for another method of testing the illuminance of lighting fixtures;

[0031] Figure 3 A flowchart for determining whether a luminaire meets Class A or Class AA standards;

[0032] Figure 4 A schematic diagram of a design and selection device for a diffusion-type AA-level illuminance system;

[0033] Figure 5 A schematic diagram of a device selection design for another type of diffused AA-level illuminance;

[0034] Figure 6 A schematic diagram showing the relationship between the area of ​​a sphere and the solid angle between a specified direction and the central direction;

[0035] Figure 7 This is a schematic diagram of the luminous flux in a sector under AA illuminance. Detailed Implementation

[0036] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0038] Example 1

[0039] The luminaire illuminance testing method provided in this application is applicable to various illuminance testing systems.

[0040] A method for testing the illuminance of a luminaire includes the following steps, such as... Figure 1 As shown:

[0041] S101: Obtain the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity;

[0042] Specifically, it can be the total angle 2θ of the light intensity of the lamp diffuser plate under peak light intensity of 20%, 40%, 50%, 60%, and 80%; for example, the total angle 2θ of the light intensity of the lamp diffuser plate under peak light intensity of 50% refers to the light intensity of the light that is directly incident on the center point of the target position. After diffusion, the light intensity continuously decreases. When the light intensity decreases to 50%, the angle formed by the current light is the total angle of light intensity.

[0043] S102: The critical angle of the luminaire diffuser plate at the current peak luminous intensity A or AA level illuminance is obtained according to the diffusion characteristic formula of the diffuser plate.

[0044] In some embodiments, the calculation of the critical angle may include:

[0045] The diffusion characteristics of the diffuser plate approximate a Gaussian or Lambert distribution, and can be expressed as a function:

[0046] I = I0 × COS(θ) n Formula 1)

[0047] Where I is the light intensity in the specified direction, I0 is the light intensity at the center, θ is the angle between the specified direction and the center direction, n>0, and when n=1, it is a Lambert distribution.

[0048] As shown in Equation 1, the light intensity of the diffuser gradually decreases from the center to the edge. Based on Equation 1, the expressions for the illuminance data (including n) at 300mm and 500mm are calculated. The specific calculation method is as follows:

[0049] Solid angle dΩ=ds / r 2 Equation 2)

[0050] S=r×sin(θ)×2×pi×r×d(θ) Equation 3 (S is the area of ​​the sphere corresponding to the solid angle, and r is the radius)

[0051] Luminous flux = I × Ω (Equation 4)

[0052] Illuminance E = Luminous flux / S (Equation 5)

[0053] Assuming the illuminance of the lighting device is E0 directly below 400mm, E1 at the 300mm arc, and E2 at the 500mm arc, then E0 / E1 < 3 (Equation 6).

[0054] E1 / E2<3, Equation 7)

[0055] From Equation 1-5, we can derive the illuminance E = I0 when r = 1m.

[0056] Therefore, E0 = I0 / 0.4 2 Formula 8)

[0057] E1 = I0 × Cos(θ1) n ×cos(θ1) 3 / 0.4 2 (cos(θ1)=4 / 5) Equation 9)

[0058] E2 = I0 * COS(θ2) n ×cos(θ2) 3 / 0.4 2 (cos(θ2)=4 / 41 1 / 2 Formula 10)

[0059] Φ = 2 × pi × I0(1 - cos(θ)) n+1 Equation 11 (Φ is the total luminous flux after diffusion) / (n+1)

[0060] Combining equations 6, 7, 8, 9, and 10, we can deduce that n < 1.45 (Equation 12).

[0061] Substituting n < 1.45 into 2θ = 2 × arccos(0.5) 1 / n The calculation shows that 2θ > 103.4°, meaning the critical angle at this specific percentage peak luminous intensity is 103.4°. S103: Compare the luminous intensity full angle 2θ with the critical angle to determine whether the current luminaire diffuser meets Class A or AA illuminance standards.

[0062] Specifically, when the critical angle is 103.4°, if the current light intensity full angle 2θ < 103.4°, it indicates that the diffuser does not meet the A / AA level illuminance and it is necessary to strengthen the diffuser particles or diffuser. If the light intensity full angle 2θ > 103.4°, it is necessary to reverse the corresponding n according to Equations 11 and 15 and calculate the corresponding luminous flux. The luminous flux is then compared with the minimum luminous flux under A or AA level illuminance to determine whether the luminaire meets the A or AA level illuminance requirements.

[0063] By implementing S101-S103, the assessment of whether the actual illuminance meets Class A / AA is avoided after the diffuser plate is installed on the luminaire. This simplifies the testing process, avoids wasting a lot of material, human, financial, and time resources, and improves the purposefulness of the testing.

[0064] The total light intensity angle 2θ can be input by the user or automatically obtained by the program. In some embodiments, when the total light intensity angle is automatically obtained by the program, it is obtained by matching the BSDF file. The BSDF file is used to evaluate the actual scattering of the diffuser. In some embodiments, the BSDF file includes the total light intensity angle 2θ or light intensity angle θ at different percentages of peak light intensity, such as the total light intensity angle 2θ of the luminaire diffuser at 20%, 40%, 50%, 60%, and 80% peak light intensity. After inputting or obtaining the peak value under the current conditions, the BSDF file can automatically match the total light intensity angle according to the corresponding peak value.

[0065] In some embodiments, the light intensity full angle 2θ = 2 × arccos(X) 1 / n ), where X is the percentage of peak light intensity; when X = 50%, the total light intensity angle 2θ = 2 × arccos(0.5) 1 / n ).

[0066] It should be understood that, in practice, the total angle 2θ of the light intensity of the luminaire diffuser at a certain peak light intensity can be input; alternatively, the total angle 2θ of the light intensity of the luminaire diffuser at different peak light intensities can be input to improve the accuracy of the evaluation results. In some embodiments, the method further includes steps such as... Figure 2 As shown:

[0067] S201: Obtain the full angle 2θ of the light intensity of the luminous diffuser plate under different specific percentages of peak light intensity; specifically, in order to improve the accuracy of the final evaluation results and reduce the impact of errors, more full angle 2θ of the light intensity of the luminous diffuser plate under different peak light intensities can be captured.

[0068] S202: The critical angle of the luminaire diffuser plate at the current peak luminous intensity A or AA level illuminance is obtained according to the diffusion characteristic formula of the diffuser plate.

[0069] S203: Compare the full angle 2θ of different light intensities with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

[0070] When performing S203, when the light intensity full angle 2θ of the luminous diffuser plate includes several luminous diffuser plates with different peak light intensities, in some embodiments, if all the light intensity full angles 2θ are less than the critical angle, it indicates that the luminous diffuser plate does not meet the A or AA level illuminance. In this case, if it is necessary to achieve the A or AA level illuminance, the diffusion particles or diffusion agent in the diffuser plate can be strengthened.

[0071] In some embodiments, if the total angle 2θ of the luminous intensity of the luminous diffuser under at least one peak luminous intensity is greater than a critical value, then the current luminous diffuser meets Class A or AA illuminance standards. Specifically, if the total angle 2θ of the luminous intensity of the luminous diffuser under at least one peak luminous intensity is greater than the critical value under the Class AA standard, then the diffuser meets Class AA illuminance standards; if the total angle 2θ of the luminous intensity of the luminous diffuser under at least one peak luminous intensity is greater than the critical value under the Class A standard but less than the critical value under the Class AA standard, then the diffuser meets Class A illuminance standards.

[0072] When the light intensity of the diffuser plate under several peak light intensities is taken at the full angle 2θ, in order to ensure the accuracy of the evaluation results, it can also be set that when the number of light intensities at the full angle 2θ greater than the critical value reaches a threshold, the diffuser plate is considered to meet the A or AA level illuminance.

[0073] It should be understood that this threshold can be set arbitrarily according to specific needs.

[0074] In some embodiments, the diffusion characteristics formula of the diffusion plate is:

[0075] I = I0 × COS(θ) n Formula 1)

[0076] Where I is the light intensity in the specified direction, I0 is the light intensity at the center, θ is the angle between the specified direction and the center direction, n>0, and when n=1, it is a Lambert distribution.

[0077] If the total angle of light intensity 2θ > 103.4°, then it is necessary to reverse-engineer the corresponding n according to Equations 11 and 15, and calculate the corresponding luminous flux. This luminous flux is then compared with the minimum luminous flux under Class A or AA illuminance to determine whether the luminaire meets the Class A or AA illuminance requirements. Specific steps include, for example... Figure 3 , 6 As shown in Figure 7:

[0078] S301: Substitute the corresponding X and 2θ from the BSDF file into the formula for calculating the full angle of light intensity and n to calculate the coefficient n under the current specific percentage of peak light intensity;

[0079] The calculation formula is: 2θ=2×arccos(X1 / n );

[0080] If we substitute the light intensity full angle 2θ corresponding to X = 50% peak value under the current diffuser profile into the formula 2θ = 2 × arccos(X), we can... 1 / n The coefficient n is calculated for a specific percentage of peak light intensity.

[0081] S302: Substitute the coefficient n into the formula relating luminous flux Φ and n to calculate the luminous flux Φ;

[0082] Specifically, the formula relating luminous flux Φ to n can be obtained through the following method:

[0083] Taking the AA-level standard as an example, according to Equation 1, Figure 6 , Figure 7 The expressions for calculating the illuminance data (including n) at 300mm and 500mm are as follows:

[0084] Solid angle dΩ=ds / r 2 Equation 2)

[0085] S=r×sin(θ)×2×pi×r×d(θ) Formula 3)

[0086] (S is the area of ​​the sphere corresponding to the solid angle, and r is the radius)

[0087] Luminous flux = I × Ω (Equation 4)

[0088] Illuminance E = Luminous flux / S (Equation 5)

[0089] Assuming the illuminance is E0 directly below the luminaire at 400mm, E1 at the 300mm arc, and E2 at the 500mm arc, then E0 / E1 < 3 (Equation 6).

[0090] E1 / E2<3, Equation 7)

[0091] From Equation 1-5, when r = 1m, the illuminance E = I0

[0092] Therefore, E0 = I0 / 0.4 2 Formula 8)

[0093] E1 = I0 × Cos(θ1) n ×cos(θ1) 3 / 0.4 2 (cos(θ1)=4 / 5) Equation 9)

[0094] E2 = I0 * COS(θ2) n ×cos(θ2) 3 / 0.4 2(cos(θ2)=4 / 41 1 / 2 Formula 10)

[0095] Φ = 2 × pi × I0(1 - cos(θ)) n+1 Equation 11 (Φ is the total luminous flux after diffusion) / (n+1)

[0096] Combining equations 6, 7, 8, 9, and 10, we can deduce that n < 1.45 (Equation 12).

[0097] According to Equation 11, Φ = 2 × pi × I0 / (n + 1) (Equation 13).

[0098] Based on the AA-level illuminance requirements in Table 1, E1 ≥ 500, E2 ≥ 250 (Equation 14)

[0099] The minimum I0 that satisfies AA illuminance can be obtained from Equation 14. Substituting the central light intensity I0 into its relationship with Φ, we can obtain the relationship between Φ and n. Specifically, by substituting the minimum I0 that satisfies AA illuminance calculated above into Equation 13, we can obtain the relationship between Φ and n. The smaller the value of n, the larger the required Φ and the more energy is required.

[0100] It should be understood that the relationship between Φ and n under Class A illuminance can also be obtained using the above method.

[0101] S303: Compare the luminous flux Φ with the minimum luminous flux under Class A or AA illuminance to determine whether the luminaire meets Class A or AA illuminance requirements.

[0102] If the luminous flux Φ is less than the minimum luminous flux under Class A or AA illuminance, it indicates that the current luminaire does not meet the Class A or AA illuminance requirements and the diffuser profile needs to be replaced, or the brightness of the luminaire's light source needs to be adjusted. If the luminous flux Φ is greater than the minimum luminous flux under Class AA illuminance, it indicates that the luminaire meets the Class AA illuminance requirements. If the luminous flux Φ is greater than the minimum luminous flux under Class A illuminance but less than the minimum luminous flux under Class AA illuminance, it indicates that the luminaire meets the Class A illuminance requirements.

[0103] Taking AA-level illuminance as an example, the specific calculation method for the minimum luminous flux under AA-level illuminance is as follows:

[0104] Given: The illuminance of luminaires of Class A / AA must meet the following table (see Table 1 for details). As shown in the table, the 120-degree sector area is:

[0105] Grade A: The arc illuminance of a 120° sector area ≤300mm is ≥300 lux, and the arc illuminance of a 120° sector ring area >300mm and ≤500mm is ≥150 lux, with uniformity ≤3.

[0106] Grade AA: The arc illuminance of a 120° sector area ≤300mm is ≥500 lux, and the arc illuminance of a 120° sector ring area >300mm and ≤500mm is ≥250 lux, with uniformity ≤3; where uniformity = minimum value / maximum value.

[0107] Table 1 Requirements for Illuminance and Illuminance Uniformity

[0108]

[0109] According to the AA-level illuminance requirements in Table 1, the minimum luminous flux required for the illuminated surface is calculated based on these requirements. Since luminous flux = illuminance × area, the illuminance within a circle with a radius of 300mm can reach 500 lux, and the illuminance within a circle of 300-500mm is calculated as 300 lux. With an illumination radius of 500mm, the illuminance can reach 250 lux. Therefore, the total required luminous flux = 500 × 3.14 × 0.3 2 +250×3.14×(0.5 2 -0.3 2 =270 lux, and the unit of radius length used in this calculation is m; since there is a transition period when the actual conversion from 500 lux to 300 lux, the actual required luminous flux will be slightly greater than 270 lux.

[0110] It should be understood that the minimum luminous flux under Class A illuminance can be calculated using the same method.

[0111] Example 2

[0112] like Figure 4 As shown, a lamp illuminance testing device 100 includes:

[0113] Acquisition unit 101 is configured to acquire the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity;

[0114] Processing unit 102 is configured to obtain the critical angle of the lamp diffuser plate at the current peak illuminance level A or AA based on the diffusion characteristic formula of the diffuser plate.

[0115] The judgment unit 103 is configured to compare the size of the total angle 2θ of the light intensity with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

[0116] For a detailed description of each of the above units, please refer to the corresponding description in the above method embodiments, which will not be repeated here.

[0117] Example 3

[0118] Combination Figure 5As shown, a luminaire illuminance testing device 200 is presented in the form of a general-purpose computing device; including but not limited to: a memory 201 and a processor 202; wherein,

[0119] A memory 201 stores program code; a processor 202 is connected to the memory and, when the program code is executed by the processor, implements the xx method in Embodiment 1.

[0120] The luminaire illuminance testing device 200 may also include a bus connecting different system components (including memory 201 and processor 202), a display unit, etc. The bus may represent one or more of several bus structures, including a memory unit bus or memory unit controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0121] Example 4

[0122] A luminaire illuminance testing system includes: a diffused illuminance design selection device as described above; and a display connected to the diffused illuminance design selection device. Detailed descriptions of these displays can be found in the prior art and will not be repeated here.

[0123] Example 5

[0124] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. The technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a computer-readable storage medium (such as a CD-ROM, USB flash drive, or external hard drive) or on a network, including several computer program instructions to cause a computing device (such as a personal computer, server, or network device, etc.) to execute the methods described above according to the embodiments of this application.

[0125] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0126] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

[0127] The apparatus, electronic device, and non-volatile computer storage medium and method provided in the embodiments of this specification are corresponding. Therefore, the apparatus, electronic device, and non-volatile computer storage medium also have similar beneficial technical effects as the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, electronic device, and non-volatile computer storage medium will not be repeated here.

[0128] The controller can be implemented in any suitable manner. For example, it can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers. Examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicon Labs C8051F320. A memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also recognize that, in addition to implementing the controller in purely computer-readable program code form, the same functionality can be achieved by logically programming the method steps to make the controller take the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the means included therein for implementing various functions can also be considered as structures within the hardware component. Alternatively, the means for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0129] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0130] For ease of description, the above apparatus is described by dividing it into various functional units. Of course, when implementing one or more embodiments of this specification, the functions of each unit can be implemented in one or more software and / or hardware.

[0131] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the embodiments of this specification can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0132] This specification is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0133] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0134] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0135] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0136] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0137] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0138] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0139] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside on local and remote computer storage media, including storage devices.

[0140] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0141] The above description is merely an embodiment of this specification and is not intended to limit the scope of one or more embodiments of this specification. Various modifications and variations can be made to one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of one or more embodiments of this specification.

Claims

1. A method for testing the illuminance of a luminaire, characterized in that, Includes the following steps: Obtain the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity; The critical angle of the luminaire diffuser plate at the current peak luminous intensity A or AA level illuminance is obtained based on the diffusion characteristic formula of the diffuser plate. Compare the total angle of light intensity 2θ with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

2. The lamp illuminance testing method as described in claim 1, characterized in that, The light intensity full angle 2θ = 2 × arccos(X) 1 / n ), where X is the percentage of peak light intensity, and n is the coefficient at a specific percentage of peak light intensity.

3. The luminaire illuminance testing method as described in claim 2, characterized in that, The luminous intensity of the diffuser plate at the full angle 2θ was obtained using a BSDF file.

4. The lamp illuminance testing method as described in claim 3, characterized in that, The BSDF file includes light intensity full angle 2θ or light intensity angle θ at different percentages of peak light intensity.

5. The luminaire illuminance testing method as described in claim 3 or 4, characterized in that, It also includes the following steps: Substitute the corresponding X and 2θ in the BSDF file into the formula for calculating the full angle of light intensity and n to calculate the coefficient n under the current specific percentage of peak light intensity; Substitute the coefficient n into the formula relating luminous flux Φ and n to calculate the luminous flux Φ. The luminous flux Φ is compared with the minimum luminous flux under Class A or AA illuminance to determine whether the luminaire meets Class A or AA illuminance requirements.

6. The method for testing the illuminance of luminaires as described in claim 1, characterized in that, The diffusion characteristic formula of the diffuser plate is: I = I0 × COS(θ) n ; Where I is the light intensity in the specified direction, I0 is the light intensity at the center, θ is the angle between the specified direction and the center direction, and n>0.

7. A lamp illuminance testing device, characterized in that, include: The acquisition unit is configured to acquire the light intensity full angle 2θ of the luminous diffuser plate at a specific percentage of peak light intensity; The processing unit is configured to obtain the critical angle of the luminaire diffuser plate at the current peak illuminance level A or AA based on the diffusion characteristic formula of the diffuser plate. The judgment unit is configured to compare the size of the full angle 2θ of the light intensity with the critical angle to determine whether the current luminaire diffuser meets the A or AA level illuminance.

8. A lamp illuminance testing device, characterized in that, include: A memory that stores program code; A processor, which is connected to the memory, and which, when the program code is executed by the processor, implements the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, It stores program instructions, which, when executed, implement the lamp illuminance testing method according to any one of claims 1-6.

10. A luminaire illuminance testing system, characterized in that, include: The luminaire illuminance testing device as described in any one of claims 7 or 8; The display is connected to the diffused illuminance design selection device.

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