High matching degree ultraviolet band sunlight simulator

Abstract

The application relates to a high-matching-degree ultraviolet-band sunlight simulator, belonging to the field of sunlight simulator light sources, and characterized in that the light source is composed of low-pressure mercury lamps and ultraviolet LED lamps; the low-pressure mercury lamps and the ultraviolet LED lamps are alternately arranged; the spectral band of the low-pressure mercury lamps is 280-360 nm; and the spectral band of the ultraviolet LED lamps is 340-410 nm. Through improvement of the existing sunlight simulator, the low-pressure mercury lamps (UVA) and the ultraviolet LED lamps are organically combined into a light source, and better matching degree with the standard sunlight spectrum is realized in the 280-400 nm band. The low-pressure mercury lamps (UVA) replace the expensive LED lamp beads in the 280-360 nm band, thereby saving the cost; meanwhile, the ultraviolet LED lamps make up for the insufficient spectrum of the low-pressure mercury lamps (UVA), perfect matching with the standard sunlight spectrum is realized, the structure is simple, operation is easy, and the application is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solar simulator light source field especially relates to a high matching degree ultraviolet wave band solar light simulator. BACKGROUND

[0002] In the production and scientific research process, need to carry out ultraviolet aging test to various materials and devices that are applied in outdoor and indoor, need to use ultraviolet light illumination device.

[0003] In prior art, commonly used ultraviolet light source has low pressure mercury lamp (UVA, UVB) and gold halogen lamp, along with use will appear the problem that spectrum occurs obvious drift, and the matching degree difference of 280-400nm wave band and standard solar spectrum AM1.5 or AM1.0 is larger, the matching degree is low, and the difference of different light sources is also very large, often causes the problem that the test result difference of same material on different ultraviolet aging equipment is large, the adaptability between different test institutions is poor. At the same time, when using ultraviolet light source with large difference from standard solar spectrum, the problem that light aging test effect deviates greatly from actual use condition appears. SUMMARY

[0004] The utility model aims at solving above-mentioned problem, provides a kind of high matching degree ultraviolet wave band solar light simulator that makes ultraviolet light aging test effect and ground actual use condition more consistent.

[0005] High matching degree ultraviolet wave band solar light simulator of the utility model, including the light source of low pressure mercury lamp and ultraviolet LED lamp composition;

[0006] The low pressure mercury lamp and ultraviolet LED lamp are alternately arranged;So that the light of low pressure mercury lamp and LED lamp can realize better irradiation uniformity, to reduce the problem that the spectrum difference of different regions is large;

[0007] The spectrum wave band of the low pressure mercury lamp is 280-360nm;The spectrum wave band of the ultraviolet LED lamp is 340-410nm. Low pressure mercury lamp (UVA) mainly contributes 280-360nm wave band spectrum;Ultraviolet LED lamp is used to make up the part that low pressure mercury lamp (UVA) is insufficient in 280-400nm spectrum band compared with standard spectrum, realizes 280-400nm wave band and standard solar spectrum AM1.5 or AM1.0 good matching, makes ultraviolet light aging test effect and ground actual use condition more consistent.

[0008] Further, high matching degree ultraviolet wave band solar light simulator of the utility model, the ultraviolet LED lamp is mixed by three kinds of lamp beads with peak wavelength at 360-370nm, 380-390nm, 390-410nm. The LED lamp bead of three wave bands has high cost performance, and can be well matched with the spectrum of low pressure mercury lamp.

[0009] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0010] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0011] The concave-convex light-reflecting plate is located at the backlight side of the low-pressure mercury lamp and the ultraviolet LED lamp.

[0012] The low-pressure mercury lamp is arranged at the concave point of the concave-convex light-reflecting plate.

[0013] The ultraviolet LED lamp is arranged at the convex point of the concave-convex light-reflecting plate.

[0014] Because the ultraviolet LED lamp is greatly affected by the environmental temperature, arranging the ultraviolet LED lamp at the convex point is beneficial to heat dissipation, thereby improving the service life.

[0015] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0016] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0017] The spectrum testing unit is electrically connected with the control and storage unit.

[0018] The control and storage unit is electrically connected with the low-pressure mercury lamp and the ultraviolet LED lamp.

[0019] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0020] The concave-convex light-reflecting plate is located at the backlight side of the low-pressure mercury lamp and the ultraviolet LED lamp.

[0021] The low-pressure mercury lamp is arranged at the concave point of the concave-convex light-reflecting plate.

[0022] The ultraviolet LED lamp is arranged at the convex point of the concave-convex light-reflecting plate.

[0023] Further, the high matching degree ultraviolet wave band sunlight simulator, the light power ratio of the three kinds of lamp beads is 1:m:n, wherein, 1≤m≤2, 1≤n≤4.

[0024] The high matching degree ultraviolet wave band sunlight simulator improves the existing sun simulator, adopts low pressure mercury lamp (UVA) and ultraviolet LED lamp to organically combine into a light source, and realizes better matching degree with the standard sunlight spectrum in the 280-400nm wave band. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Figure 1 is a front view of the high matching degree ultraviolet wave band sunlight simulator according to the embodiment of the present application;

[0026] Figure 2 Figure 2 is a side view of the high matching degree ultraviolet wave band sunlight simulator according to the embodiment of the present application;

[0027] Figure 3 Figure 3 is a structure schematic view of the concave-convex light-reflecting plate according to the embodiment of the present application;

[0028] Figure 4 Figure 4 is a structure schematic view of the ultraviolet LED lamp arrangement according to the embodiment of the present application;

[0029] Figure 5 Figure 5 is a structure schematic view of the ultraviolet LED lamp arrangement according to the embodiment of the present application;

[0030] Figure 6 Figure 6 is a structure schematic view of the spectrum test unit and control and storage unit according to the embodiment of the present application;

[0031] Figure 7 Figure 7 is a test effect diagram of the high matching degree ultraviolet wave band sunlight simulator according to the embodiment of the present application;

[0032] 1-lamp box, 2-UV light-reflecting plate, 3-low pressure mercury lamp, 4-ultraviolet LED lamp, 5-air inlet channel, 6-air outlet channel, 7-solar cell to be tested, 8-concave-convex light-reflecting plate, 9-heat dissipation part, 10-lamp bead one, 11-lamp bead two, 12-lamp bead three, 13-human-computer interaction unit, 14-control and storage unit, 15-power supply execution unit, 16-spectrum test unit. DETAILED DESCRIPTION

[0033] The high matching degree ultraviolet wave band sunlight simulator according to the embodiment of the present application will be described in detail below through the drawings and the embodiment.

[0034] Embodiment one

[0035] The embodiment discloses a high-matching-degree ultraviolet band sunlight simulator, and a light source and a lamp box 1 part structure thereof are shown in the figure Figure 1 The light source is composed of a low-pressure mercury lamp 3 and an ultraviolet LED lamp 4, the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4 are staggered arranged at a closed end of the lamp box 1, the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4 are alternately arranged, so that the light of the low-pressure mercury lamp 3 and the LED lamp can achieve better irradiation uniformity, thereby reducing the problem of large spectral difference in different regions, the spectral band of the low-pressure mercury lamp 3 is 280-360 nm, and the spectral band of the ultraviolet LED lamp 4 is 340-410 nm.

[0036] In the embodiment of the present disclosure, 17 low-pressure mercury lamps 3 and 416 ultraviolet LED lamps 4 are arranged at equal intervals of 75 mm, and in order to better reflect ultraviolet light, a UV reflector plate 2 is arranged on the inner wall of the lamp box 1, and in the case, the UV reflector plate 2 is made of a mirror aluminum plate. Meanwhile, the simulator in the embodiment is also provided with two ventilation channels, which are respectively used as an air inlet and an air outlet, and a fan is installed on the ventilation channel to dissipate heat in the lamp box 1, the fan in the air inlet channel 5 blows inward, and the fan in the air outlet channel 6 blows outward to dissipate heat.

[0037] The ultraviolet LED lamp 4 is composed of three kinds of lamp beads with peak wavelengths of 360-370 nm, 380-390 nm and 390-410 nm, and in the embodiment of the present disclosure, the lamp beads of the ultraviolet LED lamp 4 are arranged as shown in the figure Figure 4 The ultraviolet LED lamp 4 is composed of three kinds of lamp beads with peak wavelengths of 360-370 nm, 380-390 nm and 390-410 nm, and in the embodiment of the present disclosure, the lamp beads of the ultraviolet LED lamp 4 are arranged as shown in the figure

[0038] The lamp bead arrangement mode shown in the figure Figure 5 The lamp bead arrangement mode shown in the figure

[0039] It should be noted that in specific applications, the inventor can adjust the arrangement mode of the three kinds of lamp beads according to actual application scenes and needs to adapt to corresponding application scenes.

[0040] In operation, the light emitted by the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4 is mixed in the light box 1 and irradiated on the sample to be tested, so as to achieve a good match with the standard solar spectrum AM1.5 or AM1.0 in the 280-400 nm wave band, and make the ultraviolet light aging test result more consistent with the actual use on the ground.

[0041] Embodiment Two

[0042] Based on the above-described embodiment one, the high-matching-degree ultraviolet wave band solar light simulator disclosed in the embodiment comprises a concave-convex reflector 8. Figure 2 As shown in the figure, the concave-convex reflector 8 is located at the back light side of the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4; the low-pressure mercury lamp 3 is arranged at the concave point of the concave-convex reflector 8; the ultraviolet LED lamp 4 is arranged at the convex point of the concave-convex reflector 8; and the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4 are arranged on the side of the irradiation direction of the solar cell 7 to be tested.

[0043] In the embodiment, the specification of the concave-convex reflector 8 is as shown in the figure. Figure 3 As shown in the figure, the diameter of the low-pressure mercury lamp 3 is R, the depth d of the concave-convex reflector 8 ranges from R / 2 to 3R, and the opening width k of the concave-convex reflector 8 ranges from 2R to 8R. If the depth d of the concave-convex reflector 8 is too large or too small, the low-pressure mercury lamp 3 and the LED lamp bead will easily block each other, and the opening width k will also be affected.

[0044] The ultraviolet LED lamp 4 is greatly affected by the ambient temperature, and is arranged at the convex point to facilitate heat dissipation and improve the service life. The low-pressure mercury lamp 3 is arranged at the concave point to avoid blocking the light beam of the ultraviolet LED lamp 4 and improve the light simulation effect of the simulator. In the embodiment, a heat dissipation part 9 is arranged between the concave-convex reflector 8 and the light box 1, which can be air-cooled or water-cooled according to the actual situation.

[0045] Embodiment Three

[0046] Based on the above-described embodiments one and two, the high-matching-degree ultraviolet wave band solar light simulator disclosed in the embodiment further comprises a spectrum test unit 16 and a control and storage unit 14. Figure 6 As shown in the figure, the spectrum test unit 16 is electrically connected with the control and storage unit 14, and the control and storage unit 14 is electrically connected with the low-pressure mercury lamp 3 and the ultraviolet LED lamp 4 of the light box 1.

[0047] In the embodiment, the spectrum test unit 16 is arranged on the side of the light box 1. Figure 6As shown, the human-computer interaction unit 13, the control and storage unit 14, the power supply execution unit 15 and the light box 1 are sequentially connected, and these components are mature existing technologies on the market. The human-computer interaction unit 13 can be a knob, a display or a touch screen, and can adjust the output power of each light source by an operator. The control and storage unit 14 stores, analyzes and transmits the information instructions transmitted by the human-computer interaction unit 13, and can be a computer or a PLC controller. The power supply execution unit 15 supplies power to the light box 1 and controls the output power of the light box 1, and is composed of a power source POWER and a plurality of control circuits, and the control circuits include MOS tubes, silicon-controlled rectifiers or IGBT devices. In the example of the present disclosure, as shown in Figure 6 G1 and G2 are control circuits of the low-pressure mercury lamp 3, and L1, L2 and L3 are control circuits of the ultraviolet LED lamp 4. The control circuits increase or decrease the resistance in the circuit loop of the power source POWER and each light source in the light box 1, so as to independently adjust the output power of each light source of the light box 1. A constant current / voltage power source integrated with the power source POWER and the control circuit can also be used to realize the above functions, for example, the Mingwei LRS-350 series power source.

[0048] The spectral test unit 16 in the example of the present disclosure is used to monitor the spectrum of the light source in the light box 1. When the test result exceeds the threshold value, the spectral test unit 16 sends a feedback signal to the aforementioned control and storage unit 14. After receiving the feedback signal, the control and storage unit 14 adjusts the light source according to the preset scheme. Thus, it is ensured that the spectrum will not significantly drift with the decrease of the service life of the light source. Of course, after receiving the feedback signal, the control and storage unit 14 can also only give an information prompt, and at this time, manual intervention is required to adjust the power of each light source.

[0049] As shown in Figure 7 The low-pressure mercury lamp 3 and the LED lamp are organically combined to realize the matching degree with the standard sunlight spectrum in the 280-400 nm band, and the actual measurement effect is good.

[0050] In the example of the present disclosure, when the spectral test unit 16 is used for spectral monitoring, the following method is used: 280 nm-400 nm band is divided into intervals every 20 nm, and the spectral matching degree in each interval is investigated. The spectral proportion of each interval realized by the technical scheme is compared with the spectral proportion of the corresponding interval of the standard sunlight, and the ratio is processed, that is, the spectral matching degree. The comparison results of the example of the present disclosure and the AM1.5 standard spectrum are as follows:

[0051]

[0052] From the above table, it can be seen that the maximum positive deviation is 11%, the maximum negative deviation is-5%, which is less than the A+ level requirement of ±12.5%, which is sufficient to show that the actual effect of the technical solution is very good.

[0053] The high-matching-degree ultraviolet band sunlight simulator described in the embodiment uses a low-pressure mercury lamp 3 instead of an expensive 280-360 nm band LED lamp bead, thereby saving cost; the ultraviolet LED lamp 4 fills the insufficient part (360-400 nm) of the output power of the low-pressure mercury lamp 3, realizes perfect matching with the standard spectrum, and improves the overall ultraviolet region radiation power density, which is beneficial to speed up the ultraviolet aging progress and save the aging time.

Claims

1. A high-matching-degree ultraviolet band solar light simulator, characterized in that: The light source is composed of low-pressure mercury lamps and ultraviolet LED lamps; The low-pressure mercury lamps and the ultraviolet LED lamps are arranged alternately; The spectral band of the low-pressure mercury lamps is 280-360 nm; and the spectral band of the ultraviolet LED lamps is 340-410 nm.

2. The high-matching ultraviolet solar simulator according to claim 1, characterized in that: The ultraviolet LED lamps are composed of three kinds of lamp beads with peak wavelengths of 360-370 nm, 380-390 nm and 390-410 nm.

3. The high-matching ultraviolet solar simulator according to claim 2, characterized in that: The light power ratio of the three kinds of lamp beads is 1:m:n; wherein, 1≤m≤2, 1≤n≤4.

4. The high-matching ultraviolet solar simulator according to claim 1 or 3, characterized in that: The concave-convex reflector is further included; The concave-convex reflector is located at the back light side of the low-pressure mercury lamps and the ultraviolet LED lamps; The low-pressure mercury lamps are arranged at the concave points of the concave-convex reflector; The ultraviolet LED lamps are arranged at the convex points of the concave-convex reflector.

5. The high-matching ultraviolet solar simulator according to claim 4, characterized in that: The specifications of the concave-convex reflector are as follows: assuming that the diameter of the low-pressure mercury lamps is R, the depth d of the concave-convex reflector ranges from R / 2 to 3R; and the opening width k of the concave-convex reflector ranges from 2R to 8R.

6. The high matching degree ultraviolet band solar light simulator according to claim 1 or 2 or 3, characterized in that: The spectrum testing unit and the control and storage unit are further included; The spectrum testing unit is electrically connected with the control and storage unit; The control and storage unit is electrically connected with the low-pressure mercury lamps and the ultraviolet LED lamps.

7. The high-matching ultraviolet solar-simulator according to claim 6, characterized in that: The concave-convex reflector is further included; The concave-convex reflector is located at the back light side of the low-pressure mercury lamps and the ultraviolet LED lamps; The low-pressure mercury lamps are arranged at the concave points of the concave-convex reflector; The ultraviolet LED lamps are arranged at the convex points of the concave-convex reflector; The specifications of the concave-convex reflector are as follows: assuming that the diameter of the low-pressure mercury lamps is R, the depth d of the concave-convex reflector ranges from R / 2 to 3R; and the opening width k of the concave-convex reflector ranges from 2R to 8R.

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