JPS5971026A - Simulated solar device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a solar simulating device capable of simultaneously simulating direct sunlight and sky light.

[Prior art and its problems]

What is called a simulated solar device is used to test solar collectors and solar cells, but it simulates only the part of the actually existing natural light that corresponds to direct sunlight, and only simulates the part that corresponds to the light from the blue sky. The parts that do are often not simulated. This is because methods such as illuminating a hemispherical ceiling with a light source and using the reflected light to simulate light from the blue sky would require a very high power light source and would be impractical.

However, in a simulated solar device that does not have this blue sky light (sky light), the way the light hits it is different from the actual natural light, which causes errors in measuring the performance of solar collectors and solar cells. Therefore, there is a need for a device that can simultaneously obtain direct sunlight and blue sky light using a relatively simple method.

[Purpose of the invention]

The present invention has been made to satisfy the above requirements, and aims to provide a solar simulating device that can simulate natural light consisting of direct sunlight and sky light at a relatively low cost.

[Summary of the invention]

The present invention will be explained according to the drawings. In Figure 1, the light (radiation) from the light source device (radiation) passes through the diffused transmission section (■) of the light-transmitting plate (■) and becomes diffused light that hits the test element (■), and the regular transmission section (■) of the light-transmissive plate (■). The direct light that passes through it is split into light that hits the diagonal test element ■.

The light that passes through the specular transmission part becomes light equivalent to direct sunlight, and the light that hits the diffuse transmission part becomes diffused light.When it is R as shown in blue, the distance between the light source device ■ and the transparent plate ■ is a1 transparent plate ■
When the distance between and the test element ■ is b, the width of the diffuse transmission part ■ on the light transmitting plate is Rx-0,8 or - or - etc. Generally, n is an integer and 3 is 1/1. is good. The length of the diffuse transmission part is Rxb /
If it is more than a, it is unsuitable because there will be a portion that is not hit by direct light. In the case of a single light source, the spread of the light source is set to H.

The ratio of direct light and diffused light can be adjusted to an appropriate ratio by changing the area ratio of the two.

In the case of actual blue sky light, it is known that the brightness distribution is stronger near the sun and weaker farther away from the sun. Therefore, the diffuse transmitting portion does not need to be a perfect diffusing surface, and may be a diffused light having many components in the direction of the light incident axis. Therefore, the diffuser-transmitting portion may be made of ordinary frosted glass, and transparent portions and frosted glass portions are arranged alternately.

The material of the diffusion plate may be glass or plastic, and the diffusion surface may be frosted glass, opalescent glass, molded glass, or in the case of plastic, it may be opalescent plastic or prism-molded plastic.

Light from the blue sky is sunlight that is diffusely reflected.
Its spectrum has much more short-wavelength components and fewer long-wavelength components than sunlight. In the device of the present invention, the diffuse transmission plate has the ability to absorb infrared rays and long-wave visible light, or by providing a layer that reflects infrared rays and long-wave visible light, it is possible to absorb light from the blue sky spectrally. Can be simulated.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily obtain a device capable of testing the effects of sunlight under conditions substantially the same as actual outdoor conditions at a relatively low cost. Tests using only a simulated sunlight source without diffused light are likely to differ from the results of tests using actual outdoor sunlight, so it is possible to simulate even sky light, which would otherwise be unexploded. It is preferable to test using a device, and the present invention provides such a device in a relatively inexpensive and ideal way. FIG. 2 is a front view showing an example of the arrangement of light sources forming a part of the device according to the invention.

Agent Patent Attorney Kensuke Norichika (1 idiot) Figure 1 Figure 2

Claims (1)

[Claims] ■ In a simulated sunlight device consisting of a light source and a diffusive light-transmitting plate provided near the irradiated area, the diffusive light-transmitting plate has a portion consisting of a regular light-transmitting surface that does not have diffusivity. A simulated sunlight device characterized in that the simulated sunlight is provided with a layer that selectively reflects infrared rays, and in particular, a layer that selectively absorbs infrared rays.