DESC:This application is based on and derives the benefit of Indian Provisional Application 201641012899, the contents of which are incorporated herein by reference.

TECHNICAL FIELD
[001] The embodiments herein relate to testing of vehicle accessories, and more particularly to a system and a method for evaluating the performance of headlamps in vehicles.

BACKGROUND
[002] Every vehicle needs to have a headlamp, which illuminates the area in front of the vehicle, so as to enable the driver of the vehicle to see and anticipate any issues present in the front of the vehicle. It is important to test the design of the headlamp components, such as the lamp, reflectors, and so on, to ensure this.
[003] A current solution for testing the headlamp quantitatively evaluates light distribution performance of the headlamp. This involves setting a set of standards, synthesizing performance parameters of the light distribution performance of the headlamp into a visual performance grade according to the standards, and obtaining a result of performance comparison between different headlamps directly through quantitative detection. The aforementioned solution gives overall performance of the headlamp. But the solution fails to detect a particular point at which the performance of the headlamp can be derived. Moreover, the aforementioned method discloses only the highest performance, the lowest performance and the overall integrated score of minimum and maximum values.
OBJECTS
[004] The principal object of embodiments herein is to provide systems and methods for evaluating headlamp performance in a vehicle.
[005] Another object of embodiments herein is to provide systems and methods for evaluating the headlamp in the vehicle, which clearly indicates the good and bad performance areas of the headlamp under evaluation.
[006] Another object of embodiments herein is to provide a system for evaluating the headlamp in the vehicle, which overcomes the failure mode.
[007] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF FIGURES
[008] Embodiments herein are illustrated in the accompanying drawings, through out which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[009] FIG. 1 depicts an example perspective view of a vehicle placed in front of a headlamp evaluation grid, according to an embodiment as disclosed herein;
[0010] FIG. 2 depicts an example of the evaluation grid, according to an embodiment as disclosed herein;
[0011] FIG. 3 depicts a system for evaluating the headlamp performance of a vehicle, according to an embodiment as disclosed herein; and
[0012] FIG. 4a and 4b depicts example lux values as arranged by the controller, according to an embodiment as disclosed herein.

DETAILED DESCRIPTION
[0013] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0014] The embodiments herein achieve systems and methods for evaluating headlamp of a vehicle. Referring now to the drawings, and more particularly to FIGS. 1 through 4b, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[0015] FIG. 1 depicts an example perspective view of a vehicle placed in front of a headlamp evaluation grid. FIG. 2 depicts an example of the evaluation grid. The grid can be created on a flat surface, such as a wall, grid, and so on. In an embodiment herein, the size of the grid can depend on factors such as, but not limited to, the size of the vehicle, the type/arrangement of headlamps in the vehicle, and so on. In an example herein, the grid can be 40 meters for a single chamber headlamp and 70 meters for twin chamber headlamps.
[0016] The centre line of the vehicle under test should align with the centre line of the grid, denoted by Center. The letter D refers to the driver side as compared to the centre of the vehicle. The letter CD refers to the co-driver side of the vehicle. CD+2, CD+1, CD, Centre, D, D+1, D+2 points are configurable and are separated by a pre-defined unit of distance from each other. In an example herein, a distance of 1m can separate the points. The distance between the points can be configured based on the test conditions. For example, the distances between the side measuring points CD+3, D+3 can be increased, while measuring the cornering bend lamp performance of the vehicle
[0017] The grid 101 can be connected to a system for evaluating the light intensity falling on the evaluation grid. The system 300, as depicted in FIG. 3, comprises of light intensity meter 301 (which can be any device such as a lux meter, photo cells, generic devices which can comprise of at least one application that can measure intensity, or any other suitable device), a controller 302, and a database 303. The light intensity meter 301 can be placed so as to measure the intensity of the light casted by the headlamps on the grid 101 (in a suitable unit of measurement such as lux). The light intensity meter 301 can provide the measured lux values to the controller 302. The controller 302 can collate the data and determine at least one parameter associated with the headlamp. The controller 302 can classify the measured lux values in to various ranges such as low, midpoint, and high intensity values. The ranges can correspond to the performance of the headlamp and the range of visibility of the human vision, such as invisibility zones (where the human eye cannot distinguish details in that zone), good visibility zones (wherein the human eye can distinguish details in that zone), and a hot spot zone. The controller 302 can create a gradience is created for distinguishing each of these ranges. The controller 302 can arrange the lux values into at least one table (as depicted in the examples in FIGs. 4a and 4b).
[0018] For example, if the lux value is less than 15, the controller 302 will consider that spot corresponding to the lux value as a dark zone and hence an invisible zone to the human eye. If the lux value is higher than or equal to 70, then the controller 302 considers this spot as a good visibility zone. In boundary condition, the difference between adjacent points should be less than 30 lux for perceiving uniform light distribution, else the controller 302 treats this as a hot spot.
[0019] The controller 302 can store the measured lux values, the determined parameters(s), classified lux values, the arranged tables, and so on in the database 303. The database 303 can be a location where data can be stored and/or retrieved. Examples of the database 303 can be at least one of a memory, a file server, a data server, the Cloud, and so on.
[0020] In an example test scenario, the vehicle can been placed as per Standard Aiming Procedure in D+1 Condition and the Head Lamp Leveling Device (HLLD) position is zero (if the vehicle is equipped with the HLLD). This can be used as a boundary condition. From the head lamp distance from ground the alignment height (B) will be verified. The alignment height should be as per regulatory requirement (AIS 008). (A) is the vehicle centre to headlamp centre distance.
[0021] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
,CLAIMS:STATEMENT OF CLAIMS
We claim:
1. A method for evaluating headlamps of a vehicle, the method comprising
positioning the vehicle in front of a grid (101), wherein centre line of the vehicle is aligned with center of the grid (101);
measuring intensity of light cast by the headlamp from the positioned vehicle on the grid (101) by a light intensity meter (301); and
classifying at least one measured intensity by a controller (302) into at least one of a plurality of ranges, wherein the plurality of ranges corresponds to a range of visibility of human vision.

2. The method, as claimed in claim 1, wherein the grid (101) comprises of a plurality of configurable points.

3. A system (300) for evaluating headlamps of a vehicle, the system comprising
a grid (101), wherein the vehicle is positioned in front of the grid, wherein centre line of the vehicle is aligned with center of the grid (101);
a light intensity meter (301) configured for measuring intensity of light cast by the headlamp from the positioned vehicle on the grid (101); and
a controller (302) configured for classifying at least one measured intensity into at least one of a plurality of ranges, wherein the plurality of ranges correspond to a range of visibility of human vision.

4. The system, as claimed in claim 3, wherein the grid (101) comprises of a plurality of configurable points.