Dimming curve test equipment

Abstract

The utility model relates to the technical field of illumination, and discloses a dimming curve test device, which comprises a test box, a shading cylinder, an illuminance collector, a turntable and a driver, the front side surface of the test box is provided with a light through hole, the first end of the shading cylinder is connected with the light through hole, the second end of the shading cylinder is connected with a tested lamp, the turntable is provided with a convex lens and a light through diaphragm, and the light through diaphragm is connected with the light through hole. The illuminance collector and the rotating disc are arranged in the test box, the driver is installed in the test box, the output end of the driver is connected with the rotating disc and can drive the rotating disc to rotate, and the rotating disc is arranged on the front side of the illuminance collector. The probe axis of the illuminance collector, the axis of the convex lens or the axis of the light-passing diaphragm, the axis of the shading cylinder and the light-emitting axis of the tested lamp coincide. According to the utility model, a high-brightness dimming curve and a low-brightness dimming curve can be measured, the influence of ambient light can be eliminated, and the test speed and the measurement precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a dimming curve testing device. Background Art

[0002] Compared with the pursuit of high brightness of white light sources, users tend to pursue batch uniformity and color accuracy of colored lighting fixtures; accurate dimming curves can ensure the accuracy of the color of the lamps and the uniformity of the color during the dimming process, by integrating the tested high-brightness curve and low-brightness curve into a complete dimming curve.

[0003] However, the existing test equipment takes a long time to test low brightness of lamps, and high brightness testing easily exceeds the measuring range of the measuring equipment. In addition, the test process is easily affected by ambient light and requires manual movement, resulting in low measurement accuracy. Utility Model Content

[0004] The utility model aims to provide a dimming curve test device, which can measure a high brightness dimming curve and a low brightness dimming curve, can eliminate the influence of ambient light, and improves the test speed and measurement accuracy.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a dimming curve testing device, including a test box, a light-shielding tube, a light-illumination collector, a turntable and a driver, wherein a light-through hole is provided on the front side of the test box, a first end of the light-shielding tube is connected to the light-through hole, a second end of the light-shielding tube is connected to a lamp to be tested, a convex lens and a light-through aperture are provided on the turntable, the light-illumination collector and the turntable are arranged in the test box, the driver is installed in the test box, an output end of the driver is connected to the turntable and can drive the turntable to rotate, the turntable is arranged on the front side of the light-illumination collector, and the probe axis of the light-illumination collector, the axis of the convex lens or the axis of the light-through aperture, and the axis of the light-shielding tube coincide with the light-emitting axis of the lamp to be tested.

[0006] As a preferred solution of the utility model, a plurality of convex lenses with different focal lengths and a plurality of clear apertures with different clear apertures are provided on the turntable.

[0007] As a preferred solution of the utility model, the light-shielding tube is provided with an adjustment bracket, and the adjustment bracket includes a positioning plate, a movable plate and a plurality of connecting rods. The positioning plate is arranged on the second end face of the light-shielding tube, and the positioning plate is provided with a connecting hole for the connecting rod to pass through, and the connecting hole is matched with the shape of the connecting rod, the movable plate is movably sleeved on the light-shielding tube, the first end of the connecting rod is connected to the movable plate, and the second end of the connecting rod is connected to the lamp under test.

[0008] As a preferred solution of the utility model, the connecting rod is provided with a length scale value.

[0009] As a preferred solution of the utility model, the driver is a drive motor, the drive motor is installed on the front wall surface of the test box, and the output shaft of the drive motor is connected to the center point of the turntable.

[0010] Compared with the prior art, the dimming curve testing device of the present utility model has the following beneficial effects:

[0011] The utility model arranges the illuminance collector and the turntable in the test box to avoid the influence of ambient light on the accuracy of the test data, and arranges a light shielding tube in the light hole of the test box, so that the large-angle ambient light far from the light-emitting axis of the lamp to be tested is absorbed in the light shielding tube, and cannot enter the test box to affect the test accuracy of the illuminance collector; the convex lens on the turntable can focus the light on the probe of the illuminance collector, so that in the low-brightness test, the light energy density can be increased and the low-brightness test speed can be increased; the light aperture on the turntable can filter the light reaching the probe of the illuminance collector, so that in the high-brightness test, the light energy density reaching the probe can be reduced to avoid the illuminance exceeding the range of the illuminance collector during the high-brightness test; the turntable is rotated by a driver, and the convex lens or the light aperture can be adjusted to face the light shielding tube to adapt to the high-brightness test and the low-brightness test of the lamp to be tested; it can be seen that the utility model can measure the high-brightness dimming curve and the low-brightness dimming curve, can eliminate the influence of ambient light, and improve the test speed and measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0013] Figure 1 A schematic diagram of the structure of a dimming curve testing device provided by the utility model;

[0014] Figure 2 A schematic diagram of the internal structure of the test box provided by the utility model;

[0015] Figure 3 A schematic diagram of the structure of the turntable provided by the utility model;

[0016] In the figure, the test box 1, the light hole 11, the light shielding tube 2, the light intensity collector 3, the turntable 4, the convex lens 41, the light aperture 42, the driver 5, the lamp under test 6, the adjustment bracket 7, the positioning plate 71, the movable plate 72, and the connecting rod 73. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0019] like Figures 1 to 3 As shown, a dimming curve test device of a preferred embodiment of the utility model comprises a test box 1, a light shielding tube 2, a light illuminance collector 3, a turntable 4 and a driver 5, wherein the front side of the test box 1 is provided with a light through hole 11, the first end of the light shielding tube 2 is connected to the light through hole 11, the second end of the light shielding tube 2 is connected to the lamp 6 under test, the turntable 4 is provided with a convex lens 41 and a light-through aperture 42, the light illuminance collector 3 and the turntable 4 are arranged in the test box 1, the driver 5 is installed in the test box 1, the output end of the driver 5 is connected to the turntable 4 and can drive the turntable 4 to rotate, the turntable 4 is arranged at the front side of the light illuminance collector 3, the probe axis of the light illuminance collector 3, the axis of the convex lens 41 or the axis of the light-through aperture 42, and the axis of the light shielding tube 2 coincide with the light-emitting axis of the lamp 6 under test.

[0020] The utility model arranges the illuminance collector 3 and the turntable 4 in the test box 1 to avoid the influence of ambient light on the accuracy of the test data, and arranges a light shielding tube 2 in the light-through hole 11 of the test box 1, so that the large-angle ambient light far from the light-emitting axis of the lamp 6 to be tested is absorbed in the light shielding tube 2, and cannot enter the test box 1 and affect the test accuracy of the illuminance collector 3; and the convex lens 41 on the turntable 4 can focus the light on the probe of the illuminance collector 3, so that in the low-brightness test, the illuminance value can be increased by increasing the light energy density, and the higher the illuminance value, the greatly improved calculation speed of the test illuminance collector 3, thereby improving the low-brightness test speed, and at the same time, because the focusing convex lens 41 is not a non-sequential device, it will not change the sequence arrangement of the light to make the light become non-sequential light, so the illumination changes The trend of change will not be affected, that is, the change of the dimming curve at low brightness will not be affected; and the clear aperture 42 on the turntable 4 can filter the light reaching the probe of the illuminance collector 3, so that during the high-brightness test, the light energy density reaching the probe is reduced to avoid the illuminance exceeding the range of the illuminance collector 3 during the high-brightness test, and the clear aperture 42 is not a traditional frosted device, and will not disturb the light or break the light energy distribution, so that the change of the dimming curve at high brightness can be accurately obtained; by rotating the turntable 4 by the driver 5, the convex lens 41 or the clear aperture 42 can be adjusted to face the shading tube 2 to adapt to the high-brightness test and low-brightness test of the tested lamp 6; it can be seen that the utility model can measure high-brightness curves and low-brightness curves, can eliminate the influence of ambient light, and improve the test speed and measurement accuracy.

[0021] Exemplarily, the turntable 4 is provided with a plurality of convex lenses 41 with different focal lengths and a plurality of clear apertures 42 with different diameters of light holes 11; since the optical systems of different lamps are different, the angles of the emitted light are ultimately different. By adding convex lenses 41 with different focal lengths, the convex lenses 41 with appropriate focal lengths can be adjusted through the driver 5 according to actual needs to focus the light on the probe of the light intensity collector 3; since different lamps need to reduce the illumination ratio at different rates, and the problem of too low illumination to affect the test speed cannot be caused, by adding clear apertures 42 with different diameters of light holes 11, the use of lamps with different power and brightness can be adapted; the position of the turntable 4 can be adjusted through the driver 5 according to actual test requirements.

[0022] Exemplarily, the light-shielding tube 2 is provided with an adjustment bracket 7, and the adjustment bracket 7 includes a positioning plate 71, a movable plate 72 and a plurality of connecting rods 73. The positioning plate 71 is arranged on the second end face of the light-shielding tube 2, and the positioning plate 71 is provided with a connecting hole for the connecting rod 73 to pass through, and the connecting hole is matched in shape with the connecting rod 73. The movable plate 72 is movably sleeved on the light-shielding tube 2, the first end of the connecting rod 73 is connected to the movable plate 72, and the second end of the connecting rod 73 is connected to the lamp 6 under test. By adjusting the bracket 7, the lamp 6 under test can be moved closer to or away from the light-shielding tube 2, and then the distance between the lamp 6 under test and the illuminance collector 3 can be adjusted to adapt to different lamps.

[0023] Exemplarily, the connecting rod 73 is provided with a length scale value. Due to the use of a convex lens 41 with a focusing function, the light-emitting axis of the lamp 6 under test must be in the same straight line as the probe axis of the light illuminance collector 3 and the axis of the convex lens 41, otherwise the focused light spot will deviate from the probe of the light illuminance collector 3 and affect the test. The connecting rod 73 is used as a positioning ruler to measure the distance between the lamp 6 under test and the light-shielding tube 2. The distance is measured by at least two connecting rods 73 to avoid tilting of the lamp 6 under test, thereby ensuring that the light-emitting axis of the lamp 6 under test can coincide with the axis of the light-shielding tube 2.

[0024] Exemplarily, the driver 5 is a drive motor, which is installed on the front wall of the test box 1. The output shaft of the drive motor is connected to the center point of the turntable 4, so that the turntable 4 can be rotated by the drive motor to switch the shading tube 2 to face the convex lens 41 or the light-clearing aperture 42.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A dimming curve testing device, characterized in that: The invention comprises a test box, a light-shielding cylinder, a light-illumination collector, a turntable and a driver, wherein a light-through hole is arranged on the front side of the test box, a first end of the light-shielding cylinder is connected to the light-through hole, a second end of the light-shielding cylinder is connected to a lamp to be tested, a convex lens and a light-through aperture are arranged on the turntable, the light-illumination collector and the turntable are arranged in the test box, the driver is installed in the test box, an output end of the driver is connected to the turntable and can drive the turntable to rotate, the turntable is arranged on the front side of the light-illumination collector, and an axis of a probe of the light-illumination collector, an axis of the convex lens or an axis of the light-through aperture, and an axis of the light-shielding cylinder coincide with a light-emitting axis of the lamp to be tested.

2. The dimming curve test device according to claim 1, characterized in that: The rotating disk is provided with a plurality of convex lenses with different focal lengths and a plurality of clear apertures with different clear apertures.

3. The dimming curve test device according to claim 1, characterized in that: An adjustment bracket is provided on the light-shielding tube, and the adjustment bracket includes a positioning plate, a movable plate and a plurality of connecting rods. The positioning plate is arranged on the second end face of the light-shielding tube, and a connecting hole for the connecting rod to pass through is provided on the positioning plate, and the connecting hole is matched with the shape of the connecting rod. The movable plate is movably sleeved on the light-shielding tube, the first end of the connecting rod is connected to the movable plate, and the second end of the connecting rod is connected to the lamp under test.

4. The dimming curve test device according to claim 3, characterized in that: The connecting rod is provided with a length scale value.

5. The dimming curve test device according to claim 1, characterized in that: The driver is a driving motor, which is installed on the front wall of the test box, and the output shaft of the driving motor is connected to the center point of the turntable.

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