KR101530979B1 - Sensor Unit for Tracking Sunlight - Google Patents

Abstract

The solar tracking sensor unit according to the present invention includes an illuminance sensor partly blocked to reduce the maximum detectable value.
The solar tracking sensor unit includes a base, an illuminance sensor provided on the base and spaced apart from each other to measure an azimuth and an altitude of sunlight, and an illuminance sensor for measuring the altitude of the sunlight, And a shielding part for shielding a part of the shielding part.

Description

[0001] The present invention relates to a sensor unit for tracking sunlight,

Field of the Invention [0002] The present invention relates to a solar tracking sensor unit, and more particularly, to a solar tracking sensor unit capable of precisely tracking altitude and azimuth angle of the sun to improve solar tracking efficiency and integration efficiency.

Fossil energy, which is mainly used in recent years, is recognized as a major cause of environmental pollution and global warming. Regulations are gradually being formulated internationally, and the development and dissemination of environmentally friendly new renewable energy such as solar power generation is urgently required .

Generally, photovoltaic generation is a technology to convert sunlight into electric energy. When the light is irradiated, the photovoltaic effect generates photovoltaic power. Solar power generation systems consist of solar panels, batteries and power conversion devices. The solar cell is a selenium photovoltaic cell and a sulfurous copper photovoltaic cell using metal and semiconductor contact, and a silicon photovoltaic cell using semiconductor pn junction.

Conventionally, a photovoltaic power generation system using a solar cell module has attracted attention as an energy source that can prevent environmental pollution and global warming. In recent years, however, a high efficiency low cost Has become a focus on the development of solar cell modules.

When the optical axis of the condensing means such as the condensing lens and the condensing reflector for condensing the sun on the solar cell and the direction of the sunlight does not coincide with each other, the focus of the sunlight is deviated from the solar cell and the power generation efficiency is greatly lowered There is a problem.

There has been proposed a highly efficient light collecting solar tracking device and methods thereof capable of precisely tracking sunlight in order to align the direction of sunlight with the optical axis of the light collecting means. In the case of such a high efficiency light collecting solar tracking device, there is a solar photodetector for roughly firstly tracking sunlight through a solar photodetector, a solar tracking sensor for secondarily tracking sunlight firstly tracked through a solar photodetector .

However, since the conventional solar photodetector and the solar ray tracking sensor are provided as separate modules, the manufacturing cost is increased, and installation is troublesome due to installation separately.

A general sunlight tracking device is provided with a plurality of illuminance sensors so that the positions where the illuminance values of the plurality of illuminance sensors have the same value are all positioned perpendicular to the sunlight, Can be obtained. The maximum measurement value of a general illuminance sensor used in such a solar tracking device is 1024 lux. However, in the case where the maximum value is high as described above, even though the shadow is projected on the illuminance sensor, it can be recognized as the maximum measurement value of the illuminance sensor of 1024 lux due to sun light scattering, ultraviolet rays, infrared rays or radiant heat, It is difficult to track the sunlight.

KR0988264 10

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a solar tracking sensor unit capable of precisely tracking altitude and azimuth angle of sun and improving sunlight tracking efficiency and integration efficiency.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the object of the present invention as described above, the solar tracking sensor unit includes an illuminance sensor that is partially blocked to reduce the maximum detectable value.

The solar tracking sensor unit includes a base, an illuminance sensor provided on the base and spaced apart from each other to measure an azimuth and an altitude of sunlight, and an illuminance sensor for measuring the altitude of the sunlight, And a shielding part for shielding a part of the shielding part.

Further, the blocking portion has a columnar shape.

In addition, the blocking unit is provided to cover a part of the illuminance sensor so as to block a predetermined area of the illuminance sensor.

In addition, a first auxiliary sensor is further provided on the upper surface of the blocking portion.

The apparatus further includes a through hole formed at one side of the center of the upper surface of the blocking portion and a second auxiliary sensor provided at a bottom surface perpendicular to the through hole.

In addition, a tubular light guide portion for connecting the through hole and the second auxiliary sensor is further provided.

Further, on the side surface of the cut-off portion, a protective portion for covering the illuminance sensor is provided at a position corresponding to the illuminance sensor to protect the illuminance sensor.

The solar tracking sensor unit of the present invention has the following effects.

First, by covering a part of the illuminance sensor with the blocking part, the maximum measurement value of the illuminance sensor is reduced, and the error of the illuminance sensor is minimized by the light scattering of sunlight, ultraviolet ray, infrared rays or radiant heat, It is effective.

Secondly, the blocking unit is provided at a position where a part of the plurality of illuminance sensors can be covered, and the shadow is generated and the illuminance sensor is simultaneously blocked, thereby simplifying the structure, reducing the manufacturing cost and facilitating the manufacture.

Third, the auxiliary sensor provided at the upper part of the blocking part determines the presence or absence of sunlight, thereby blocking the driving of the solar tracking device when there is no sunlight, thereby restricting the use of unnecessary power.

Fourth, there is an effect that a plurality of illuminance sensors can precisely track by controlling azimuth and elevation angles respectively.

Fifth, there is an effect that more precise tracking can be performed through the auxiliary sensor formed on the bottom surface of the blocking portion by using sunlight flowing through the through hole formed in the top surface of the blocking portion.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, And shall not be interpreted.
1 is a perspective view of a solar tracking sensor unit according to the present invention;
2 is an exploded perspective view of a solar tracking sensor unit according to the present invention;
3 is a plan view of a solar tracking sensor unit according to the present invention; And
4 is a longitudinal sectional view of a solar tracking sensor unit according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Configuration of solar tracking sensor unit

FIG. 1 is a perspective view of a solar tracking sensor unit according to the present invention, and FIG. 2 is an exploded perspective view of a solar tracking sensor unit according to the present invention. 1 and 2, the solar tracking sensor unit 10 according to the present invention includes a base 100, a plurality of illuminance sensors 210, 220, 230, and 240, and a blocking unit 300 do.

The base 100 attaches the solar tracking sensor unit 10 to the condensing solar power generator and a space in which the illuminance sensors 210, 220, 230, and 240 and the blocking unit 300 can be seated . A substrate or the like receiving measured values of the illuminance sensors 210, 220, 230, and 240 may be mounted inside the base 100.

3 is a plan view of the solar tracking sensor unit according to the present invention. A plurality of illuminance sensors 210, 220, 230, and 240 are provided on the base 100 and the altitude and azimuth angles of the sunlight condensing device are determined according to illuminance values measured by the illuminance sensors 210, 220, And the like. The illuminance sensors 210, 220, 230, and 240 are arranged in a plurality so that the altitude and the azimuth of the sun can be measured on the base 100. The arrangement of the illuminance sensors 210, 220, 230, But it is preferable that they are radially provided with respect to the center of the base 100 as shown in FIG. 3, or they are provided in a lattice shape.

In this way, a plurality of illuminance sensors 210, 220, 230, and 240 track the altitude of the sunlight, and a part of them track the azimuth angle of the sunlight. This solar tracking method will be described in more detail in the usage of the solar tracking sensor unit 10 to be described later.

The blocking unit 300 changes the measured values of the illuminance sensors 210, 220, 230, and 240 due to the shadows generated according to the angle of the sunlight and detects a part of the illuminance sensors 210, 220, 230, 220, 230, and 240 to reduce the maximum value that can be detected by the illuminance sensors 210, 220, 230, and 240.

The blocking unit 300 includes a plurality of light intensity sensors 210, 220, and 230, which are formed in a columnar shape having a predetermined height in the base 100 so as to form a shadow by sunlight, And 240, respectively. In this way, by covering a part of the illuminance sensors 210, 220, 230, and 240 through the shielding unit 300, the illuminance sensors 210, 220, 230, and 240 of the illuminance sensors 210, 220, The illuminance of the input sunlight is reduced and detected. That is, when the illuminance value input to the entire illuminance sensors 210, 220, 230 and 240 is 1000 lux, the illuminance of the illuminance sensor 210, 220, 230, %, The measured values of the illuminance sensors 210, 220, 230, and 240 will have an error, but they are theoretically reduced to about 500 lux.

Assuming that the maximum measured value of the illuminance sensors 210, 220, 230, 240 is 1000, and the actual illuminance value of the sunlight exceeds 1000, measurement is impossible.

For convenience of explanation, the four sensors will be referred to as a first illuminance sensor 210 to a fourth illuminance sensor 240, respectively.

Actual sun illumination value Exposed front
sensor 50% of the area
Obscured sensor The first illuminance sensor 1500 1000 750 The second illuminance sensor 1100 1000 550 Article 3 1200 1000 600 Article 4 1000 1000 500

As shown in [Table 1], if the sun is too strong, or a shadow occurs on a part of the sensor due to factors such as light scattering, ultraviolet rays or infrared rays, the illuminance of the sun exceeds the maximum measurement value of 1000 lux There may be cases.

In this case, as shown in [Table 1], a clear difference in illuminance values occurs depending on the positions of the illuminance sensors 210, 220, 230, and 240. However, the sensor recognizes all of them as the maximum measured value of 1000 lux, The altitude angle and the azimuth angle are recognized to be perpendicular to the sunlight, so that the light collection efficiency of the sunlight may be lowered.

However, when the area corresponding to 50% of the total area of the illuminance sensors 210, 220, 230, and 240 is covered by the shielding part 300 like the illuminance sensors 210, 220, 230 and 240 of the present invention The illuminance values of the sunlight input to the illuminance sensors 210, 220, 230, and 240 are reduced to half, and are recognized within the measurement ranges of the illuminance sensors 210, 220, 230, and 240. Since there is a difference in illuminance values, the altitude and azimuth angles of the solar tracking device are adjusted to compensate for the variations in the illuminance values, so that the values measured by the plurality of illuminance sensors 210, 220, 230, It can be adjusted vertically.

As described above, the illuminance sensor with the full openness can measure the illuminance of the sunlight only from 0 to 1000 lux, but when the area of the illuminance sensors 210, 220, 230 and 240 is blocked by 50% Can be measured.

In this manner, by blocking a portion of the illuminance sensors 210, 220, 230, and 240, the range of measured illuminance values of the sunlight is improved, thereby enabling more precise tracking of the sunlight.

That is, when the maximum measured illuminance value is 1000 lux, there is no significant difference between the illuminance sensors 210, 220, 230, and 240 that are exposed to the front or 0% to 1000 lux and 50% , Light scattering, ultraviolet rays, infrared rays, etc., exceeding the maximum measurement value of 1000 lux, it is impossible to measure the illuminance of the exposed surface illuminance sensor.

However, since the sunlight incident on the illuminance sensors 210, 220, 230 and 240 blocked by 50% is reduced in half, and the measured values of the illuminance sensors 210, 220, 230 and 240 are improved to 2000 lux, The illuminance of the range can be measured.

However, when the illuminance sensors 210, 220, 230, and 240 that block one side of the sensor are used as in the present invention, the same sensor as the conventional one is used A wider range of illumination can be measured.

In the drawing, the blocking unit 300 forms a shadow to form shadows on the illuminance sensors 210, 220, 230, and 240 according to the altitude and azimuth of the sunlight while the blocking unit 300 includes a plurality of illuminance sensors 210 220, 230, and 240 to cover a part of the illuminance sensors 210, 220, 230, and 240. However, depending on the usage, (230) such as a shielding film that shields a part of the plurality of illuminance sensors (210, 220, 230, 240) provided at a position adjacent to the first shielding part (300) .

In addition, a first auxiliary sensor 410 for determining the presence or absence of sunlight is provided on one side of the upper surface of the blocking portion 300. The illuminance sensors 210, 220, 230 and 240 are devices for determining the presence or absence of sunlight according to the measured values of the illuminance sensors 210, 220, 230 and 240, rather than determining the altitude and the azimuth angle of the sunlight.

A through hole 310 is formed at one side of the center of the upper surface of the shielding part 300 so that sunlight can be introduced into the shielding part 300 through the through hole 310, And a second auxiliary sensor 420 is provided on the inner bottom surface at a position corresponding to the through hole 310. The through hole 310 and the second auxiliary sensor 420 may be provided so as to have the same vertical center axis.

The second auxiliary sensor 420 is an apparatus for checking whether the azimuth angle and the altitude angle are accurately adjusted by the illuminance sensors 210, 220, 230 and 240, It is determined that the azimuth angle and the altitude angle are accurately adjusted when the sunlight is detected by the second auxiliary sensor 420. [

A tubular light guide unit 350 for connecting the through hole 310 and the second auxiliary sensor 420 is further provided to improve the measurement rate of the second auxiliary sensor 420. The light guide unit 350 is a device that allows the second auxiliary sensor 420 to detect sunlight only when the sunlight is vertically incident through the through- That is, when sunlight is incident obliquely through the through hole 310, sunlight is projected on the wall surface of the light guide unit 350, so that the second auxiliary sensor 420 can not detect the sunlight.

In the absence of the light guide part 350, when solar light is incident at an angle close to vertical through the through hole 310, solar light may contact only a part of the second auxiliary sensor 420, It can be judged that the azimuth and altitude angles are accurately adjusted. However, since the error range of the azimuth angle and the altitude angle can be reduced when the light guide unit 350 is installed, altitude angles and azimuth angles for obtaining higher efficiency solar light can be set.

The illuminance sensors 210, 220, 230, and 240 are provided on the outer circumferential surface of one side of the outer circumferential surface of the blocking unit 300, preferably, the blocking unit 300 corresponding to the plurality of illuminance sensors 210, 220, 230, The protection unit 500 is further provided to prevent contamination or breakage of foreign objects such as fallen leaves. As shown in FIGS. 1 to 4, the protection unit 500 may have an elliptical pipe shape or a hemispherical shape. If the protection unit 500 does not interfere with the measurement of the illuminance sensors 210, 220, 230, and 240 Any shape can be used as long as it can protect the illuminance sensors 210, 220, 230, and 240 from external factors.

Usage of Solar Tracking Sensor Unit

The solar tracking sensor unit 10 according to the present invention is installed at one side of the condenser plate of the solar light condensing device.

3, the first illuminance sensor 210 and the third illuminance sensor 230, which are located on both left and right sides of the blocking unit 300, And the second illuminance sensor 220 and the fourth illuminance sensor 240 located on both the upper and lower sides of the blocking unit 300 measure the altitude angle of the sun. This is changed according to the installation direction of the solar tracking sensor unit 10, but is not limited to that shown in the drawings.

The sunlight tracking sensor unit 10 installed on the light collecting plate grasps the presence or absence of sunlight by the first auxiliary sensor 410 provided on the upper surface of the shielding unit 300. That is, when the illuminance value is measured by the sunlight at the first auxiliary sensor 410, it is determined that sunlight is incident and the tracking is started.

The tracking of the sunlight is performed by the illuminance values measured by the first illuminance sensor 210 to the fourth illuminance sensor 240. The illuminance values of the first illuminance sensor 210 to the fourth illuminance sensor 240 vary according to the shadows generated by the shielding unit 300. Using this principle, the altitude and the azimuth angle of the solar tracking device are adjusted so that the shadow generated by the shielding part 300 does not occur as much as possible.

When the altitude and azimuth angles of the solar tracking device are adjusted through the above-described process so that the sunlight and the condenser plate are substantially perpendicular to each other, the illuminance values measured by the first illuminance sensor 210 to the fourth illuminance sensor 240 , Are measured in the same manner. However, since a minute angle difference may occur, it can be matched through the through hole 310 and the second auxiliary sensor 420.

That is, when the angle of the sunlight incident through the through hole 310 is not vertical, sunlight is incident on the inner side of the light guide unit 350, and sunlight is not incident on the second sub sensor 420 , Only a part thereof is incident. In this case, it is determined that there is an error in the solar tracking sensor unit 10, and in order to reduce the error, the sunlight tracking device is operated more precisely so that the condenser plate and the sunlight can be vertical.

When the sunlight passing through the through hole 310 and the light guide unit 350 and arriving at the second auxiliary sensor 420 through the above operation, the solar tracking apparatus can obtain the strongest light condensing efficiency.

If there is no illuminance value input to the first auxiliary sensor 410 during the tracking of the sunlight by repeating the above-described process, since the sunlight is blocked by the cloud or sunlight is not generated, the tracking of the sunlight is stopped The power for driving the solar tracking unit may not be consumed.

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: Solar tracking sensor unit
100: Base
210: 1st illuminance sensor
220: Second illuminance sensor
230: Section 3 Sensor
240: Section 4 Level Sensor
300; Blocking portion
310: Through hole
350: light guide portion
410: first auxiliary sensor
420: Second auxiliary sensor
500: Protection section

Claims (8)

delete Base;
An illuminance sensor provided on the base and provided to be spaced apart from each other to measure an azimuth angle and an altitude of sunlight;
A columnar blocking portion provided to cover a part of the illuminance sensor so as to block a predetermined area of the illuminance sensor in order to reduce the maximum detectable value of the illuminance sensor;
A first auxiliary sensor on the upper surface of the blocking portion;
A through hole formed on one side of the center of the upper surface of the blocking portion; And
A second auxiliary sensor provided on a bottom surface perpendicular to the through hole; And
A tubular light guide portion connecting the through hole and the second auxiliary sensor;
The solar tracking sensor unit comprising: delete delete delete delete delete 3. The method of claim 2,
And a protection unit surrounding the illumination sensor at a position corresponding to the illumination sensor for protecting the illumination sensor.

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