JP4973479B2 - Simulated solar irradiation device - Google Patents

Description

  The present invention relates to a pseudo-sunlight irradiation device that emits pseudo-sunlight.

Pseudo-sunlight irradiation device that irradiates the irradiated object with simulated sunlight that reproduces the spectrum distribution of natural sunlight for performance measurement and accelerated deterioration test of various solar energy utilization devices such as photoelectric conversion characteristics of solar cells It has been known.
In this type of simulated sunlight irradiation device, a light source such as a xenon lamp is installed in the box, and an irradiation box that emits simulated sunlight by using an optical filter on the radiation surface of the box is used. A device in which a reflector is provided in a form in which the light source is sandwiched in the irradiation box to reduce the size and cost of the apparatus is known (for example, see Patent Document 1). However, since the reflectors are provided in the irradiation box so as to face each other, the maintenance work becomes much difficult. Therefore, in recent years, there is a diffused light irradiation type pseudo-sunlight irradiation device in which a reflecting plate having light diffusibility is arranged facing the radiation surface of the irradiation box and the irradiated light is irradiated to the irradiated object. It has been proposed (see, for example, Patent Document 2).
JP 2002-296319 A JP 2003-28785 A

However, in the diffused light irradiation type pseudo-sunlight irradiation apparatus, the irradiated light from the irradiation box is not directly irradiated onto the irradiated object, and only the reflected light reflected and diffused by the reflecting plate is irradiated. For this reason, the utilization efficiency of the light source is poor, and in order to obtain a desired illuminance, it is necessary to take measures such as using a light source with higher output.
This invention is made | formed in view of the situation mentioned above, and aims at providing the pseudo-sunlight irradiation apparatus which can improve the utilization efficiency of a light source and can obtain higher illumination intensity.

In order to achieve the above object, the present invention comprises a pseudo-sunlight irradiation box that accommodates a linear light source, has a radiation surface formed on an upper surface and a lower surface, and is provided with an optical filter on each radiation surface, A surface to be irradiated is disposed so as to face the radiation surface on the upper surface of the light irradiation box, and a reflection surface extending along the linear light source is disposed to face the radiation surface on the lower surface of the pseudo-sunlight irradiation box. And irradiating the simulated sunlight directly from the radiation surface on the upper surface of the simulated sunlight irradiation box toward the irradiated surface, and the illuminance in the simulated sunlight irradiation from the radiation surface on the upper surface is insufficient compared to other places In order to compensate for the illuminance of the place where the light is applied, the reflection surface that reflects the simulated sunlight from the radiation surface on the lower surface of the simulated sunlight irradiation box and irradiates the irradiated surface is provided, and the reflection The surface is the pseudo The surface directly under the sunshine irradiation box irradiates the end of the irradiated surface in a direction orthogonal to the longitudinal direction of the linear light source, and the surface far from directly under the simulated sunlight irradiation box is the simulated sunlight irradiation box. A pseudo-sunlight irradiation device is provided that irradiates a portion of the irradiated surface directly above .

Further, the present invention provides the above-described pseudo-sunlight irradiation apparatus, wherein the reflection surface has a reflection angle that can be independently adjusted, and a plurality of reflection plates that extend along the longitudinal direction of the linear light source. In addition, it is characterized in that the reflected light from the plurality of the reflecting plates is irradiated to a place where the illuminance is insufficient compared with other places in the pseudo-sunlight irradiation from the radiation surface of the upper surface.

Moreover, this invention was equipped with the shielding member which shields the emission of the light from the both sides along the longitudinal direction of the said pseudo-sunlight irradiation box along the longitudinal direction of the said linear light source in the said pseudo-sunlight irradiation apparatus. It is characterized by that.

  Further, the present invention provides the simulated sunlight irradiation apparatus, wherein the plurality of linear light sources are disposed substantially coaxially in the simulated sunlight irradiation box with a predetermined gap therebetween, and the simulated sunlight irradiation. When the irradiated surface is irradiated with simulated sunlight from the radiation surface of the upper surface of the box, the simulated light is irradiated by the simulated sunlight for a distance that makes the illuminance substantially constant in the major axis direction of the plurality of linear light sources. The solar light irradiation box is arranged at a position separated from the irradiated surface.

According to the present invention, the simulated sunlight is directly irradiated from the radiation surface on the upper surface of the simulated sunlight irradiation box toward the irradiated surface, and the illuminance in the simulated sunlight irradiation from the radiation surface on the upper surface is from other places. In order to make up for the illuminance of the lack of light, the simulated sunlight from the radiation surface on the lower surface of the simulated sunlight irradiation box is reflected and irradiated by the reflecting surface, so that both direct and reflected light are emitted. Is irradiated on the irradiated surface, the light source utilization efficiency can be improved and higher illuminance can be obtained on the irradiated surface.
In addition, since the reflected light is irradiated so as to compensate for the uneven illuminance generated on the irradiated surface by direct light irradiation, the uneven illuminance on the irradiated surface can be suppressed.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal sectional view schematically showing a configuration of a simulated solar light irradiation apparatus 1 according to an embodiment of the present invention.
The simulated sunlight irradiating device 1 has a lattice-like frame 4 configured by assembling a plurality of prismatic frames 2. In the present embodiment, the frame body 4 has a length of about 2300 mm, a width of about 1300 mm, and a height of about 1180 mm. A pseudo-sunlight irradiation box 6 that emits pseudo-sunlight is provided between the side surfaces facing each other in the length direction of the frame body 4, and the reflecting surface 8 is opposed to the lower surface 6 </ b> A of the pseudo-sunlight irradiation box 6. In addition to the arrangement, an irradiated object 10 having a flat irradiated surface 10A such as a solar battery panel is arranged to face the upper surface 6B of the simulated sunlight irradiation box 6, and each of the four sides of the frame 4 is arranged. The side surface is covered with a light shielding plate (not shown).
The irradiated body 10 is placed on the sample support frame 12 mounted on the frame body 4, so that the irradiated surface 10 </ b> A is at a position separated from the pseudo-sunlight irradiation box 6 by a predetermined distance L. Has been placed.

FIG. 2 is a diagram showing a configuration of the simulated sunlight irradiation box 6, FIG. 2 (A) is a diagram schematically showing a cross section, and FIG. 2 (B) is a plan view.
The simulated sunlight irradiation box 6 includes a pair of long plate-like frames 24 constituting the left and right side surfaces 20A and 20B, and two pieces constituting a substantially flat upper surface 6A and lower surface 6B fitted into each frame 24. The IR cut filters 26 and 27 and the L-shaped metal fitting 28 for assembling the frame 24 and the IR cut filter are configured in a columnar shape having a width of about 106 mm and a height of about 36 mm. Two straight tube lamps (linear light sources) 22 and 23 are accommodated. A xenon lamp or the like is used for the lamps 22 and 23, and when the artificial sunlight is irradiated, the lamps are turned on and light is emitted instantaneously.

  Further, in the simulated sunlight irradiation box 6, the pair of frames 24 constitute both side surfaces 20 </ b> A and 20 </ b> B in the longitudinal direction of the simulated sunlight irradiation box 6, thereby shielding light emission from these both side surfaces 20 </ b> A and 20 </ b> B. The lower surface 6A and the upper surface 6B that face each other serve as a light emitting surface, and the light emitted from the pseudo-sunlight irradiation box 6 is divided into two parts: light directed upward and light directed downward. Will be. The IR cut filters 26 and 27 constituting the radiation surface are optical filters for spectral distribution adjustment, and are coated with a film having a characteristic of cutting infrared light (heat rays). 27, the radiated light from the lamps 22 and 23 is transmitted, so that the spectrum-adjusted pseudo sunlight is radiated from each radiation surface.

In the IR cut filters 26 and 27, back surface reflection as shown by arrows A and B in FIG. As a result, on the irradiated surface 10A of the irradiated object 10, the illuminance distribution by the direct light emitted from the upper surface 6B of the simulated sunlight irradiation box 6 is as follows.
FIG. 3 is a diagram showing an illuminance distribution on the irradiated surface 10A, and FIG. 4 is a diagram showing an illuminance distribution along the line II in FIG. 3 indicates the center position of the lamps 22 and 23 arranged in a straight line (the position of the gap 42 between the lamps 22 and 23).
In general, although the illuminance is highest in the vicinity of the lamps 22 and 23, since the back surface reflection occurs on each radiation surface of the simulated sunlight irradiation box 6 as described above, the IR cut filter 27 on the lower surface 6A. The light reflected from the back surface is diffusely radiated in the width direction from the radiation surface of the upper surface 6B. As a result, as shown in FIGS. 3 and 4, the illuminance distribution by the direct light on the irradiated surface 10A has peaks Pk1 and Pk2 on both sides viewed from the lamps 22 and 23, and the width direction from each peak Pk1 and Pk2. The distribution is such that the illuminance gradually decreases as the distance from the center increases. For this reason, when only direct light irradiation is performed on the irradiated surface 10A, three regions Ra to Rc in which the illuminance is insufficient with respect to the peaks Pk1 and Pk2 are generated in the direction orthogonal to the lamps 22 and 23.

  The reflection surface 8 arranged below the simulated sunlight irradiation box 6 is simulated sunlight from the radiation surface of the lower surface 6A of the simulated sunlight irradiation box 6 so as to compensate for the insufficient illuminance in the three regions Ra to Rc. By irradiating the irradiated surface 10A with the reflected light, the illuminance on the irradiated surface 10A is made uniform as shown by the phantom line in FIG. 4 by the direct light and the reflected light, as shown in FIG. As described above, the reflection plate 30 is configured to have a plurality of reflection devices 32 that can be tilted.

FIG. 5 is a plan view showing the right half when viewed from the simulated sunlight irradiation box 6 of the simulated sunlight irradiation device 1, and FIG. 6 is a diagram showing a cross section of the simulated sunlight irradiation device 1.
As shown in these drawings, the reflecting plate 30 is a plate material whose surface extends substantially parallel along the pseudo-sunlight irradiation box 6, and holds the reflecting plate 30 and the reflecting plate 30. The reflection device 32 is configured by the holder 31. A plurality of (18 in the present embodiment) reflecting devices 32 are arranged in parallel on the bottom floor 4 </ b> A of the frame body 4, so that a plurality of reflecting plates 30 are laid and provided. Thus, the reflection surface 8 is formed.

  The holder 31 has an angle adjusting mechanism for adjusting the inclination angle of the reflecting plate 30 so that the reflecting angles of the respective reflecting plates 30 can be adjusted independently of each other. It has become. At this time, as shown in FIG. 1 described above, the heights of several holders 31 close to both sides in the width direction of the frame body 4 are sequentially increased, and the reflected light of the reflecting plates 30 on both sides is inside. It is prevented from being shielded by the reflector 30.

FIG. 7 is a diagram showing the path of reflected light from each reflecting plate 30 with respect to the reflecting plate 30 arranged on the left half when viewed from the lamps 22 and 23.
As shown in this figure, the reflected light of each of the left half reflectors 30 is irradiated toward substantially the left half of the irradiated surface 10A, and the reflection of the right half reflectors 30 (not shown) is reflected. The light trajectory is also symmetrical about the left half of the trajectory and the simulated sunlight irradiation box 6, and the reflected light of the simulated sunlight is irradiated on substantially the entire irradiated surface 10 </ b> A.
At this time, it is set as the structure which irradiates the reflected light from the some reflecting plate 30 for every area | region Ra-Rc (only Ra and Rb are shown in FIG. 7) where illumination intensity is insufficient. Thereby, it becomes possible to adjust the illuminance of the reflected light irradiated to each of the regions Ra to Rc in multiple stages, and the reflected light is accurately distributed according to the illuminance shortage in each of the regions Ra to Rc. The uniformity is increased.

By the way, in order to make it possible to increase the area of the irradiated region in response to the increase in the area of solar cells and the like in recent years, in the present embodiment, the two lamps 22 and 23 are coaxially arranged in the simulated sunlight irradiation box 6. The light source which extended the full length by arranging is comprised. At this time, as shown in FIG. 5, in the simulated sunlight irradiation box 6, the terminal blocks 40 are disposed at both ends of the lamps 22 and 23, and therefore, between the lamps 22 and 23. Is provided with a gap 42 as a space for arranging the terminal block 40.
As described above, when the gap 42 exists between the lamp 22 and the lamp 23, the gap 42 becomes dark in the longitudinal luminance distribution in the simulated sunlight irradiation box 6, and therefore, in the illuminance distribution by the direct light on the irradiated surface 10A. The illuminance at the location facing the gap 42 decreases.

Therefore, in this embodiment, when the simulated sunlight irradiation box 6 is attached to the frame body 4, the distance L (FIG. 1) from the upper surface 6B of the simulated sunlight irradiation box 6 to the irradiated surface 10A is set to the lamp 22 and The light emitted from each of the lamps 23 toward the upper surface 6 </ b> B spreads and reaches a position facing the gap 42, so that the illuminance in the major axis direction of the lamps 22 and 23 is substantially constant.
As a result, as shown in FIG. 3, uneven illuminance along the major axis direction of the lamps 22 and 23 can be prevented in the illuminance distribution on the irradiated surface 10A. For this reason, since it is not necessary to supplement the illuminance along the major axis direction of the lamps 22 and 23 with the reflected light, it is easy to correct the illuminance by the reflected light on the irradiated surface 10A.

  As shown in FIG. 3, in this embodiment, as shown in FIG. 5 and FIG. 6, an auxiliary reflecting surface 50 configured to reflect light toward both ends in the length direction is provided. It has been. The auxiliary reflection surface 50 adjusts the reflection angle (inclination angle) of the auxiliary reflection surface 50 when, for example, the illuminance drop of the direct light on both ends in the length direction of the simulated sunlight irradiation box 6 is significant. It can be used to compensate for the decrease in illuminance.

As described above, according to the present embodiment, the simulated sunlight is directly irradiated from the radiation surface of the upper surface 6B of the simulated sunlight irradiation box 6 toward the irradiated surface 10A, and the simulated sunlight from the radiation surface of the upper surface 6B. The surface to be illuminated is reflected by reflecting the simulated sunlight from the radiation surface of the lower surface 6A of the simulated sunlight irradiation box 6 by the reflecting surface 8 so as to supplement the illumination intensity of the portion where the illumination intensity is insufficient compared with other locations in the sunlight irradiation. Since it is configured to irradiate 10A, both the direct light and the reflected light are irradiated onto the irradiated surface 10A, so that the use efficiency of the light emitted from the lamps 22 and 23 is increased, and the irradiated surface 10A is higher. Illuminance can be obtained.
In addition, since the reflected light is irradiated so as to compensate for the illuminance unevenness generated on the irradiated surface 10A by direct light irradiation, the uneven illuminance on the irradiated surface 10A can be suppressed.

  In particular, according to the present embodiment, the reflecting surface 8 is configured by arranging a plurality of reflecting plates 30 that can adjust the reflection angle independently and extend along the lamps 22 and 23, and is irradiated. Since the surface Ra is irradiated with the reflected light from the plurality of reflecting plates 30 for each of the regions Ra, Rb, and Rc where the illuminance is insufficient at the time of direct light irradiation on the surface 10A, the illuminance of the reflected light irradiated to each region Ra to Rc is It is possible to adjust in multiple stages, and the reflected light is distributed with high accuracy according to the lack of illuminance in each of the regions Ra to Rc, and the uniformity on the irradiated surface 10A is increased.

  Moreover, according to this embodiment, since it was set as the structure which shields the radiation | emission of the light from the both sides along the longitudinal direction of the simulated sunlight irradiation box 6 with the flame | frame 24, the light radiated | emitted from the simulated sunlight irradiation box 6 is. Since the light that is directly directed to the irradiated surface 10A and the light that is directed to the reflecting surface 8 is divided and light that irradiates the side surface of the frame 4 and causes irregular reflection is suppressed, uneven illuminance on the irradiated surface 10A is reduced. It becomes easy to design reflected light to compensate.

  Further, according to the present embodiment, the light radiated from the irradiated surface 10 </ b> A toward the upper surface 6 </ b> B from each of the lamp 22 and the lamp 23 spreads on the upper surface 6 </ b> B of the simulated sunlight irradiation box 6 and faces the gap 42. In this case, in the illuminance distribution on the irradiated surface 10A, the lengths of the lamps 22 and 23 are set to be separated from each other by a distance L such that the illuminance in the major axis direction of the lamps 22 and 23 is substantially constant. It is possible to prevent uneven illuminance along the axial direction. Thereby, since it is not necessary to supplement the illuminance along the major axis direction of the lamps 22 and 23 with the reflected light, the illuminance can be easily corrected by the reflected light on the irradiated surface 10A.

  It should be noted that the above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.

It is a longitudinal cross-sectional view which shows typically the structure of the simulated sunlight irradiation apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of a simulated sunlight irradiation box, (A) is a figure which shows a cross section typically, (B) is a top view. It is a figure which shows the illumination intensity distribution by the direct light of a to-be-irradiated surface. It is a figure which shows the illumination intensity distribution of the width direction by the direct light of a to-be-irradiated surface. It is a top view which shows the right half seeing from the simulated sunlight irradiation box of a simulated sunlight irradiation apparatus. It is a figure which shows the cross section of a simulated sunlight irradiation apparatus. It is a figure which shows the locus | trajectory of the reflected light from each reflecting plate about the reflecting plate arrange | positioned at the left half seeing from a lamp | ramp (pseudo sunlight irradiation box).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pseudo sunlight irradiation apparatus 4 Frame body 6 Pseudo sunlight irradiation box 8 Reflecting surface 10 Subject to be irradiated 10A Irradiated surface 22, 23 Lamp 24 Frame (shielding member)
26, 27 IR cut filter 30 Reflector 31 Holding fixture 42 Gap L Distance

Claims (4)

Containing a linear light source, having a pseudo-sunlight irradiation box in which a radiation surface is formed on the upper surface and the lower surface, and an optical filter is provided on each radiation surface;
The irradiated surface of the irradiated object is disposed so as to face the radiation surface on the upper surface of the simulated sunlight irradiation box, and extends along the linear light source so as to face the radiation surface on the lower surface of the simulated sunlight irradiation box. Provide a reflective surface,
While directly irradiating simulated sunlight from the radiation surface of the upper surface of the simulated sunlight irradiation box toward the irradiated surface,
In order to compensate for the illuminance of the place where the illuminance is insufficient from other places in the simulated sunlight irradiation from the radiation surface of the upper surface, the simulated sun from the radiation surface of the lower surface of the simulated sunlight irradiation box toward the place Providing the reflective surface for reflecting light to irradiate the illuminated surface ;
The reflective surface irradiates an end of the irradiated surface in a direction perpendicular to the longitudinal direction of the linear light source, and the surface immediately below the simulated sunlight irradiation box is a surface far from directly below the simulated sunlight irradiation box. Irradiates a portion of the irradiated surface directly above the simulated sunlight irradiation box . In the simulated solar light irradiation device according to claim 1,
The reflection surface is configured by arranging a plurality of reflection plates, the reflection angle of which can be adjusted independently, and extending along the longitudinal direction of the linear light source , and the pseudo sun from the radiation surface of the upper surface. The pseudo-sunlight irradiating apparatus characterized by irradiating the reflected light from the plurality of the reflecting plates to a place where the illuminance is insufficient compared with other places in the light irradiation. In the pseudo-sunlight irradiation device according to claim 1 or 2,
A pseudo-sunlight irradiation apparatus, comprising: a shielding member that shields light emission from both side surfaces along the longitudinal direction of the pseudo-sunlight irradiation box along the longitudinal direction of the linear light source . In the pseudo-sunlight irradiation device according to any one of claims 1 to 3,
In the pseudo-sunlight irradiation box, a plurality of the linear light sources are arranged substantially coaxially with a predetermined gap between them,
When the irradiated surface is irradiated with simulated sunlight from the radiation surface on the upper surface of the simulated sunlight irradiation box, the illumination is substantially constant in the major axis direction of the plurality of linear light sources by irradiation of the simulated sunlight. The simulated sunlight irradiation device is characterized in that the simulated sunlight irradiation box is disposed at a position separated from the irradiated surface by a distance of

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