JPH0632569Y2 - Sun position sensor for angle control of solar concentrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sun position sensor for controlling the angle of a light receiving surface or a reflecting surface of a sunlight concentrator so that it is always directed toward the sun.

(Prior Art) A sun position sensor that detects the direction of sunlight is constructed by symmetrically connecting a pair of photodetection photoelectric elements on the same surface of a base, and a light concentrator for horizontal angle control. In general, two for elevation control are used as one set.

Therefore, the outputs of the pair of photoelectric elements are required to be equal for the same incident light beam, but since the photoelectric conversion characteristics of the detection elements are not the same, it is necessary to adjust them so that they are equal. .

(Purpose) In the present invention, in a solar position sensor having a pair of detection elements on a base, the amount of incident light on each element can be easily adjusted according to its output characteristics, and stable output can be obtained even with changes in sunshine. The present invention also provides a sensor that is not affected by disturbances such as reflected light from the outside.

(Structure) The sensor of the present invention is a sensor including a pair of photoelectric elements, in which a pair of recesses for inserting and accommodating the pair of photoelectric elements and a slit for introducing sunlight are provided at positions corresponding to both outsides of the accommodating recesses. A base having slide guide walls on both sides is fixed in the case, and a slide member with a cutout is provided on the upper surface of the accommodation recess so that the position of the slide member can be adjusted along the slide guide wall. There is.

In the above configuration, the operation is most stable when the pair of slits are provided outside each of the lines connecting the two photoelectric elements (solar cells). That is, with such a configuration, sunlight can be introduced at a wide angle, and it is less likely to be disturbed by scattered light due to local reflection of clouds, etc., and the sun can be stably tracked even in fine weather or cloudy weather. Like

The slit width is experimentally determined in consideration of the sensitivity of the element and the sensitivity of the microcomputer controlling the driving device.

(Example) In the drawings, (1) is a cylindrical case, (2) and (3) are bottom spacers, (4) is a photoelectric device mounting base, and (5) is a pair of photoelectric devices, respectively. The lead wire (7) is fitted and fixed in the recess (6) provided in the mounting base, and extends through the spacer or the like to lead the lead wire (7) to the outside.

Slide member having notch (9) on each photoelectric element
(8) is provided to shield the photoelectric element (5) from light.

Reference numeral (10) is a slide guide piece which is located on both outer sides of each slide member and fixed on the base, and a sunlight introduction slit (11) is provided at a position corresponding to the photoelectric element (5).

(12) is a position adjusting screw attached to each slide member.

In addition, the upper part of each slide member is an appropriate light shield plate (not shown).
May be covered with.

Of course, the slide guide piece and the base may be integrally formed.

The sensor (13) of the present invention configured as described above is the light receiving surface of the light receiving type solar concentrator (14) as shown in FIGS. 4 and 5.
The base (4) is fixed and used so as to be parallel to (15).

(Operation and effect) In the sensor of the present invention, its output is input to the light-receiving surface driving device (not shown) of the light concentrating device, but if the output characteristics of each element are different, the driving device malfunctions and the light-receiving surface is not Cannot face the sun.

In such a case, when the vertical axis direction of the sensor coincides with the sun position, the slide member (8) of each sensor is slid so that the output of each sensor is the same, that is, the driving device does not operate, and the slit (11) And adjust the amount of incident light from the notch (9).

By this adjustment, the sensor output of one set of the light concentrator becomes the same (or the difference output is zero), and the sun position can be correctly tracked thereafter.

In the proposed sensor, the light reaching each detection element is introduced through the slit (11), and the amount of the light is adjusted by the notch (9) and introduced into the mounting recess (6). It has the advantage of being less susceptible to disturbances.

Further, there is an effect that the sensitivity can be adjusted in response to the fluctuation of sunshine due to the cloudy weather or the change of sunlight intensity in summer and winter, and the function of the light collecting device can be improved.

The sensor of the present invention can be applied not only to the light receiving type light collecting device but also to the reflection type light collecting device (17) as shown in FIG. 6, and in this case, the light shielding cover (16) is provided.

[Brief description of drawings]

FIG. 1 is a perspective view of the product of the present invention, FIG. 2 is a plan view, FIG. 3 is a sectional view of essential parts, and FIGS. 4 to 6 show usage modes of the sensor of the present invention. Side view of a light collector
The figure is a front view, and FIG. 6 is a side view when it is used for a reflection type light collecting device. (4) is a base, (6) is a recess, (8) is a slide member, (9) is a notch, (11) is a slit, (12) is an adjustment screw

Claims (1)

[Scope of utility model registration request] 1. A solar position sensor for use in a solar concentrator, comprising a pair of photoelectric elements, wherein a pair of recesses for fitting and accommodating the pair of photoelectric elements and both outsides of the accommodating recesses are provided. A base having slide guide walls provided with corresponding slits for sunlight introduction on both sides is fixed in the case, and a slide member with a notch is provided on the upper surface of the accommodation recess. A solar position sensor for angle control of a solar concentrator, the position of which is adjustable along the sun.