KR101912708B1 - Contamination Measuring Device for Solar Panel Surface and Solar Cell Panel Measuring Contamination - Google Patents

Abstract

The present invention relates to an apparatus for measuring surface contamination of a solar cell panel, which comprises a base, a light emitting element located at one end of the base and outputting light, a light receiving element located at the other end of the upper surface of the base, And a processor for determining the degree of contamination based on the amount of light sensed by the light receiving element.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a solar cell panel,

The present invention relates to an apparatus for measuring surface contamination of a solar cell panel and a solar cell panel for measuring contamination. More particularly, the present invention relates to a method for measuring the degree of cleanliness of a solar cell panel based on the amount of light reflected or transmitted through a reflection plate or a transmission window And a solar cell panel for measuring contamination.

Environmental problems caused by the generation of greenhouse gases caused by the use of fossil fuels and the global warming caused by them are rising. Therefore, researches for utilization of alternative energy are actively proceeding.

The adoption rate of solar cells using solar energy among green energy is increasing. In recent years, solar cells are being used in homes as well as government offices to use the necessary power.

However, the efficiency of the solar cell is drastically lowered even if the surface of the solar cell is slightly contaminated. In recent years, there has been an increasing problem of reducing power production efficiency due to dust or foreign matter accumulated on the surface of a solar cell panel due to increase of fine dust due to air pollution.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a solar cell module capable of easily measuring the pollution degree of a solar cell panel by attaching one module including a light emitting device, a light receiving device, And to provide a device for measuring surface contamination of a panel.

The present invention can effectively measure the contamination of a solar cell panel using light emitted from a light emitting device through a reflection plate provided on the solar cell panel or through a transmission window attached to the solar cell panel, There is another purpose in providing a solar panel.

According to an aspect of the present invention, there is provided a light emitting device comprising: a base; a light emitting element located at one end of the base and outputting light; a light receiving element located at the other end of the base; And a processor for determining the degree of contamination based on the amount of light sensed by the light receiving element.

The processor sets the output value of the light receiving element that senses the light reflected from the reflector in a predetermined state as a reference value and compares the output value of the light receiving element that senses the light reflected from the reflector in the state at the measurement time with the reference value So that the degree of contamination can be determined.

The light receiving element and the reflector may be plural, and one of the plurality of reflectors may be enclosed by a cover, and the cover may include a cavity corresponding to the light path.

A plurality of reflectors disposed in the optical path, wherein a portion of the light output from the light emitting device is directed toward one of the plurality of reflectors And a total reflection mirror for reflecting the light outputted from the semi-transparent mirror to the other one of the plurality of reflectors.

The light emitting device may include a lens unit that condenses and outputs the light so as to pass through the cavity.

The light emitting device is adjusted so that the output light is directed toward the reflector, and the light receiving device is adjusted to sense the light reflected from the reflector.

The present invention provides a light emitting device comprising a base, a light emitting element located at one end of the base, a light emitting element for emitting light, a light receiving element located on one surface of the base, and a light receiving element covering the upper surface of the light receiving element, And a processor for determining the degree of contamination based on the amount of light sensed by the light receiving element. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The light receiving element and the transmission window are plural, and one of the plurality of transmission windows is enclosed by a cover, and the cover may include a cavity corresponding to the optical path.

A translucent mirror positioned in the optical path for passing a part of the light output from the light emitting element toward one of the plurality of transmission windows and reflecting the output remaining light, And may further include a total reflection mirror for refracting the other of the plurality of transmission windows.

The light emitting device may include a lens unit that condenses and outputs the light so as to pass through the cavity.

According to another aspect of the present invention, there is provided a light emitting device comprising a base, a light emitting element located at one end of the base, a light emitting element for emitting light, a first light receiving element located on one side of the base, a second light receiving element located at the other end of the one side of the base, A glass sample placed on an upper surface of a light receiving element and including a reflecting portion for reflecting the output light and a transmitting portion for transmitting the light; and a control portion for controlling the degree of contamination based on the amount of light sensed by the first and second light receiving elements. The present invention can provide a solar cell surface contamination measuring device including a processor for judging a surface contamination of a solar cell panel.

A semitransparent mirror positioned at an optical path of light output from the light emitting device and dividing the output light into first light and second light and transmitting the first light and reflecting the second light; And a total reflection mirror for reflecting a second light reflected from the mirror, wherein one of the first and second light is directed to the transmission portion, and the other one of the first and second lights can be directed to the reflection portion have.

According to another aspect of the present invention, there is provided a solar cell module comprising: a panel frame; a solar cell module disposed inside the panel frame; a reflector detachably coupled to an upper surface of the solar cell module; A light emitting element disposed at the other corner of the panel frame facing the light emitting element and adapted to sense light reflected from the reflector, And a processor for determining the degree of contamination based on the amount of light sensed by the light receiving element.

The present invention provides a solar cell module comprising a panel frame, a solar cell module positioned inside the panel frame, a light receiving element located on one side of the solar cell module, a transmission window surrounding the top surface of the light receiving element, And a processor for determining the degree of contamination on the basis of the amount of light sensed by the light receiving element, wherein the controller controls the amount of light to be transmitted to the light receiving element, The above object can be achieved by providing a solar cell panel for measurement.

The present invention relates to a solar cell module comprising a panel frame, a solar cell module positioned inside the panel frame, a light emitting device located at one corner of the panel frame, A second light receiving element located at the other corner of the panel frame, a glass specimen surrounding the upper surface of the first light receiving element, a reflective portion reflecting the output light, and a transmissive portion transmitting the light, And a processor for determining a degree of contamination based on the amount of light sensed by the first and second light receiving elements, wherein the processor is located in an optical path of light output from the light emitting element, Further comprising a translucent mirror for transmitting the first light and reflecting the second light and a total reflection mirror for reflecting the second light reflected from the translucent mirror, One of the first light and the second light is directed to the transmissive portion, and the other of the first and second lights is directed toward the reflective portion.

As described above, according to the present invention, the light output from the light emitting device is reflected on a reflector on the surface of a solar cell or passes through a transmission window to measure the degree of contamination of the solar cell panel based on the amount of light reaching the light receiving device, It can inform the cleaning time.

1 is a perspective view illustrating an apparatus for measuring surface contamination of a solar cell panel according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing that the apparatus for measuring surface contamination of a solar cell panel according to the first embodiment of the present invention includes a further reflector. FIG.
3 is a view schematically showing a cover for enclosing a reflector.
4A is a view schematically showing the internal structure of the light emitting element.
4B is a view schematically showing the internal structure of the light receiving element.
5 is a view showing that light is split using a translucent mirror and a total reflection mirror which are located on the optical path of the light emitting element.
6 is a cross-sectional view illustrating an apparatus for measuring surface contamination of a solar cell panel according to a second embodiment of the present invention.
FIG. 7 is a perspective view illustrating an apparatus for measuring surface contamination of a solar cell panel according to a second embodiment of the present invention, including an additional transmission window. FIG.
8A, 8B, 8C, and 8D are diagrams showing a reflection film application pattern of a glass specimen of a solar cell panel surface contamination measuring apparatus according to a third embodiment of the present invention.
FIG. 9 is a perspective view illustrating an apparatus for measuring surface contamination of a solar cell panel according to a third embodiment of the present invention.
10 is a perspective view showing a solar cell panel for measuring contamination according to a fourth embodiment of the present invention.
11 is a perspective view showing that a solar panel for measuring contamination according to a fourth embodiment of the present invention includes a further reflecting plate.
12A and 12B are cross-sectional views showing a combination of a reflector and a solar cell panel for measuring contamination.
13 is a perspective view illustrating a solar cell according to a fifth embodiment of the present invention.
FIG. 14 is a perspective view showing that a solar cell according to a fifth embodiment of the present invention further includes a transparent plate. FIG.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. It should be understood, however, that the techniques described herein are not intended to be limited to any particular embodiment, but rather include various modifications, equivalents, and / or alternatives of the embodiments of this document. In connection with the description of the drawings, like reference numerals may be used for similar components.

Also, the terms "first," "second," and the like used in the present document can be used to denote various components in any order and / or importance, and to distinguish one component from another But is not limited to those components. For example, the first user equipment and the second user equipment may represent different user equipment, regardless of order or importance. For example, without departing from the scope of the rights described in this document, the first component can be named as the second component, and similarly the second component can also be named as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this document may be interpreted in the same or similar sense as the contextual meanings of the related art and, unless expressly defined in this document, include ideally or excessively formal meanings . In some cases, even the terms defined in this document can not be construed as excluding the embodiments of this document.

Hereinafter, a configuration of an apparatus for measuring surface contamination of a solar cell panel according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIGS. 1, 2, and 3, an apparatus for measuring surface contamination of a solar cell panel including a reflector according to an embodiment of the present invention will be described.

FIG. 1 is a perspective view of a solar cell panel surface pollution measuring apparatus including a reflector according to a first embodiment of the present invention, FIG. 2 is a schematic view of a solar cell panel surface pollution measuring apparatus according to a first embodiment of the present invention And a reflector. 3 is a view schematically showing a cover for covering a reflector.

Referring to FIG. 1, an apparatus 100 for measuring surface contamination of a solar cell panel according to a first embodiment of the present invention includes a light emitting device 110, a light receiving device 120, and a reflector 130.

The light emitting device 110 is attached to one surface of the base 140. The light emitting device 110 includes a light source 115 that outputs light. The light source 115 may be a rare light source that outputs laser light, but the type of the light source 115 is not limited thereto, and an LED light source or the like may be used.

The light receiving element 120 is attached to one surface of the base 140 and disposed to face the light emitting element 110. The light receiving element 120 includes an optical sensor 125 and detects light through the optical sensor 125. [ The light sensor 125 may include a device such as a cadmium sulfide (CdS) device whose resistance changes when light arrives. Thus, when light reaches the optical sensor 125, the value of the resistor can be transferred to the processor. The optical sensor 125 is not limited to the optical sensor described above, and a sensor capable of outputting a different value according to the amount of light may be used as the optical sensor 125 of the light receiving element 120. That is, the optical sensor 125 may use a photodiode, a solar cell, an image sensor, a photodiode array, or the like.

The reflector 130 is attached to one surface of the base 140 and reflects light output from the light emitting device 110. The light reflected by the reflector 130 reaches the light receiving element 120. The reflector 130 uses a reflective mirror capable of reflecting incident light with little loss.

The light output from the light emitting device 110 is reflected by the reflector 130 before the reflector 130 is contaminated with the external environment and the reference value of the pollution degree is calculated based on the output value according to the amount of light reaching the light receiving device 120 .

The reflector 130 is embedded on one surface of the base 140. However, the reflector 130 may be attached to the base 140 in a protruding manner.

Further, the reflector 130 is made of a reflective glass having a reflectance close to 100%. The reflector 130 can be replaced after the pollution is measured and cleaned at the time of cleaning. To this end, the reflector 130 may comprise a magnet or may have a fixing protrusion. Correspondingly, the base 140 may be a magnetic body or have a fixing groove, and the reflector 130 may be fixed to the base 140 by the magnetic force of the magnet, or the fixing protrusion and the fixing groove may be hooked.

The lower case 180 may be attached to the bottom of the base 140. The lower case 180 may include a power unit (not shown), a communication unit (not shown), and a processor (not shown). The power unit supplies energy for emitting light to the light emitting device 110 and supplies power to each component for operation of the solar panel surface contamination measuring apparatus 100. The communication unit can transmit an output value according to the amount of light sensed by the light receiving element 120 to a processor outside the apparatus.

The processor may be disposed inside the lower case 180, and the degree of contamination can be measured based on the output value of the light receiving element 120. Specifically, the output value calculated from the amount of light currently sensed by the light receiving element 120 is compared with a reference value that is previously measured and calculated in a reflector with a reflectance of 100%, and the amount of light reaching the light receiving element 120 It is judged that the pollution degree is high, and the cleaning time of the solar cell panel is judged. In the case of the optical sensor 125 using a cadmium sulfide (CdS) element, when the amount of light reaching the optical sensor 125 is large, the resistance of the optical sensor 125 is low and the optical sensor 125 And outputs it to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. If the output resistance value is high, it is determined that the amount of light reaching the optical sensor 125 is small.

If the processor has an output value higher than the reference value, it is determined that the degree of contamination is severe, and the cleaning timing is determined based on the determination.

When the optical sensor 125 is of the same type as the photodiode, the processor sets the reference value and the output value based on the current value. If the optical sensor 125 has an output value lower than the reference value, it is determined that the degree of contamination is severe. .

That is, the processor compares the output value with a reference value calculated on the basis of the intensity of the light sensed by the optical sensor 125 to determine a cleaning time.

The lower case 180 can attach a member having a high frictional force to prevent slippage in the solar cell panel. Further, in order to increase the bonding force between the lower surface of the base and the solar cell panel, the lower case 180 may be formed of a material such as a magnet or may include a magnet. Alternatively, the lower case 180 may be fixed to the solar cell panel by hook coupling. In addition, the lower case 180 surface may include a rubber material for preventing slipping.

In addition, the solar panel surface contamination measuring apparatus 100 has an upper case 190 for enclosing the apparatus. The case has openings 191 and 192 on the side of the light emitting element 110 and the light receiving element 120 so that the case does not interfere with the flow of light.

The solar panel surface contamination measuring apparatus 100 includes an upper case 190 so that the solar cell surface contamination measuring apparatus 100 can improve stability from external environments such as dust and humidity. The upper case 190 may have a structure in which only the reflector 130 is exposed to the outside and the light emitting device 110 and the light receiving device 120 are enclosed.

Referring to FIG. 2, the light emitting device 110 includes a plurality of light receiving devices 120 and a plurality of reflectors 130.

A semi-transparent mirror and a total reflection mirror may be provided on the optical path of the light emitting device 110 so that the light emitted from the light emitting device 110 may be directed to the respective reflectors 130, as described later with reference to FIG.

A plurality of reflectors 130 may be disposed and disposed between the light emitting element 110 and the light receiving element 120. One of the plurality of reflectors 130 is encased in a cover 150.

Referring to FIG. 3, the cover 150 surrounds one side of the reflector 130. The cover 150 includes a light oil inlet 151 and a light oil outlet 152 so that light can pass therethrough. The light oil inlet 151 is an opening for allowing the light output from the light emitting element 110 to reach the reflector 130 and the light oil outlet 152 is formed by a light reflected from the reflector 130 to the light receiving element 120 To be reached. The mineral oil inlet 151 and the mineral oil outlet 152 are located on the path of light travel. Therefore, the cover 150 does not interfere with the path of light travel.

The cover 150 covers one side of the reflector 130 and thus the reflector 130 with the cover 150 covered by the solar panel surface contamination measuring apparatus 100 is not exposed to the outside environment Block access to foreign objects.

Light output from the light emitting element 110 is reflected by the reflector 130 covered with the cover 150 and reaches the light receiving element 120. The reference value is set based on the output value of the light receiving element 120 that senses the light reflected by the reflector 130.

The processor compares the reference value and the output value to determine the degree of contamination. A method of determining the degree of contamination can be performed as in the method described above in Fig. That is, depending on the type of the optical sensor 125, the resistance value or the current value of the optical sensor 125 is transferred to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. The processor determines the degree of contamination and determines the timing of cleaning based on this.

The structure of the light emitting device 110 and the light receiving device 120 will be described with reference to FIGS. 4A and 4B.

Fig. 4A is a view schematically showing the internal structure of the light emitting element, and Fig. 4B is a view schematically showing the internal structure of the light receiving element.

Referring to FIG. 4A, the light emitting device 110 includes a light source 115, an optical filter 116, and lenses 117 and 118.

The optical filter 116 adjusts the intensity of light output from the light source 115. The optical filter 116 is located on the path of the light output from the light source 115. The lens may be composed of a convex lens 117 and a concave lens 118. Light passing through the convex lens 117 is condensed by focusing, and a concave lens 118 is disposed near the position of the focus so that the condensed light can be straightened in parallel.

Referring to FIG. 4B, the light receiving element 120 includes an optical sensor 125 and an optical filter 126.

The optical filter 126 adjusts the intensity of light reaching the light receiving element 120. Light passing through the optical filter 126 reaches the optical sensor 125 and detects the amount of light. The optical filter 126 of the light receiving element 120 and the optical filter 116 of the light emitting element 110 may be omitted in consideration of the degree of saturation of the optical sensor 125. [

In Fig. 4B, a plurality of sensing elements of the optical sensor 125 of the light receiving element 120 are shown. In this case, the sensitivity of the optical sensor 125 is better than that of a single sensing element, and the light receiving area is advantageously widened. Of course, the sensing element may be composed of one. The sensing element is appropriately selected according to the amount of light reaching the light receiving element 120.

In the case where the light source 115 of the light emitting element 110 is an LED light source, the light receiving element may further include a convex lens 117 and a concave lens 118 like the light emitting element 110 in order to increase light condensation.

In the case of FIG. 1, the light emitting devices 110 are composed of one. Therefore, the reference value and the output value calculated on the basis of the amount of light sensed by the light receiving element 120 are not measured at the same time. That is, in the case of the embodiment of FIG. 1, the reference value is measured and set before use of the apparatus 100 for measuring surface contamination of the solar cell panel. In the embodiment of FIG. 2, the light reflected from the reflector 130 without the cover of the solar panel surface contamination measuring apparatus 100 is sensed, and the reflector 130 covered with the cover is used before or after the measurement of the output value of the light- So that the reference value can be measured. As shown in Fig. 2, when calculating the reference value and the output value at the same time, the pollution degree can be determined by comparing the values calculated under the same conditions, so that the accuracy of the determined pollution degree can be increased.

Referring to FIG. 5, a structure for simultaneously calculating and comparing a reference value and an output value using a semi-transparent mirror will be described.

5 is a view showing that light is split using a translucent mirror and a total reflection mirror which are located on the optical path of the light emitting element.

Referring to FIG. 5, the solar panel surface contamination measuring apparatus includes a translucent mirror 160 and a total reflection mirror 170.

The translucent mirror 160 passes a part of the light output from the light emitting device 110 toward one of the reflectors 130 and reflects the remaining output light toward the total reflection mirror 170. At this time, the reflection amount and the transmission amount of light of the translucent mirror 160 can be adjusted so that the amount of each of the lights branched from the translucent mirror 160 is constant.

The total reflection mirror 170 refracts the light reflected by the semitransparent mirror 160 to the other reflector 130.

Hereinafter, the operation of the solar cell panel surface contamination measuring apparatus 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4B.

The intensity of the light emitted from the light source 115 of the light emitting device 110 can be adjusted through the optical filter 116. The light having passed through the optical filter 116 passes through the convex lens 117 and the concave lens 118, is condensed and goes straight to the reflector 130. The reflector 130 reflects the light at an angle of reflection equal to the incident angle of the incident light. At this time, the reflector 130 can use a front reflector whose reflectance is close to 100%. The light reflected by the reflector 130 travels toward the light receiving element 120. Light passes through the optical filter 126 of the light receiving element 120 and reaches the optical sensor 125.

Light reaching the optical sensor 125 reduces the resistance of the optical sensor 125 and applies a voltage across the resistance of the optical sensor to measure the resistance value or the current value.

The processor sets a reference value according to the degree of contamination based on the measured resistance value or current value. For example, if the measured resistance is 1 ohm (ohm) and the resistance of the reflector 130 surface is about 30% contaminated is 1.3 ohm (ohm), the processor sets the 1.3 ohm do.

The solar panel surface contamination measuring device 100 is installed on the solar cell panel, and after a predetermined time passes, the resistance value is measured by the above-described method. In this case, external dust or foreign matter adheres to the reflector 130 and the reflectivity is lowered. If the contamination level of the surface exceeds 30%, the resistance measurement value becomes 1.3 (Ω) or more. At this time, the processor can notify that the cleaning time of the solar panel has come through an output unit such as a display (not shown).

When the optical sensor 125 measures the current value, the processor determines that the contamination degree is high when the current value sensed by the optical sensor is measured to be smaller than the reference value, and determines the cleaning time.

Referring to FIGS. 2 and 5, the operation of the solar cell surface contamination measuring device in the case where the reflectors 130 are formed in plural is explained.

5, the translucent mirror 160 reflects a part of the light output from the light emitting device 110 toward one of the plurality of reflectors 130 And reflects the remaining output light. The total reflection mirror 170 refracts the light reflected by the semitransparent mirror 160 to the other one of the plurality of reflectors 130 and proceeds. One of the plurality of reflectors 130 is covered with a cover 150.

Although not shown in the drawings of the present invention, when a plurality of light emitting devices 110 are provided, one light emitting device 110 advances light to a reflector 130 covered with a cover 150, 110 advance the light to a reflector 130 that is not covered with a cover.

One of the light output from the light emitting device 110 goes to the reflector 130 covered with the cover 150. The light output from the light emitting device 110 passes through the light oil inlet 151 of the cover 150 and is incident on the reflector 130. The reflector 130 reflects the light at an angle of reflection equal to the incident angle of the incident light. At this time, the reflector 130 can use a front reflector whose reflectance is close to 100%. The light reflected by the reflector 130 passes through the light oil outlet 152 of the cover 150 and travels toward the light receiving element 120. Light passes through the optical filter 126 of the light receiving element 120 and reaches the optical sensor 125.

Light reaching the optical sensor 125 reduces the resistance of the optical sensor 125 and applies a voltage across the resistance of the optical sensor to measure the resistance value. The processor sets the reference value based on this.

The other one of the light output from the light emitting device 110 goes to the reflector 130, which is not covered with the cover 150. The reflector 130 reflects the light at an angle of reflection equal to the incident angle of the incident light. The light reflected by the reflector 130 travels toward the light receiving element 120. Light passes through the optical filter 126 of the light receiving element 120 and reaches the optical sensor 125.

Light reaching the optical sensor 125 reduces the resistance of the optical sensor 125 and applies a voltage across the resistance of the optical sensor to measure and output the resistance value.

The processor determines the degree of contamination based on the output resistance value and the reference value, as described above in the operation method of the embodiment of FIG.

When the optical sensor 125 measures the current value, the processor determines that the contamination degree is high when the current value sensed by the optical sensor is measured to be smaller than the reference value, and determines the cleaning time. The cleaning timing judgment process is similar to the case of using the resistance value as the reference value.

In this case, the processor can notify the cleaning time of the solar panel through an output unit such as a display (not shown) based on the determination of the contamination degree.

6 and 7, an apparatus for measuring surface contamination of a solar cell panel including a transmission window according to a second embodiment of the present invention will be described.

FIG. 6 is a cross-sectional view showing an apparatus for measuring surface contamination of a solar cell panel according to a second embodiment of the present invention. FIG. 7 is a sectional view of a solar cell panel surface contamination measuring apparatus according to a second embodiment of the present invention, Fig.

Referring to FIG. 6, an apparatus 200 for measuring surface contamination of a solar cell panel includes a light emitting device 210, a light receiving device 220, and a transmission window 230.

The light emitting device 210 is attached to one side of the base 240. The light emitting device 110 includes a light source 215 that outputs light. The light source 215 may be a rare light source that outputs laser light as described above with reference to FIG. 1. However, the light source 215 is not limited to this, and may be used as an LED light source.

The light receiving element 220 is attached to one surface of the base 240 or is embedded on one surface of the base 240. The light sensor 225 of the light receiving element 220 may be arranged to be exposed on one side of the base 240. The light sensor 225 detects the amount of light reaching the light receiving element 220. The transmission window 230 is disposed on the upper surface of the light receiving element 220 and allows light output from the light emitting element 210 to pass through the light receiving element 220. It is preferable that the transmission window 230 uses a glass whose transmittance of light is close to 100%.

The light output from the light emitting element 210 passes through the transmission window 230 and reaches the light receiving element 220 before the transmission window 230 is contaminated with the external environment. The reference value is determined. At this time, the reference value of the pollution degree can be determined by calculating an output value when the reflector is contaminated to a certain degree.

The transmission window 230 is embedded in one surface of the base 240 but the present invention is not limited thereto and the transmission window 230 may be attached to the base 240 in a protruding manner . The transmission window 230 may be a magnet or a hook, similar to the reflector 130 of the apparatus for measuring surface contamination of a solar cell panel 100 according to the first embodiment of the present invention.

The lower case 270 may be attached under the base 240. The lower case 270 may include a power unit (not shown), a communication unit (not shown), and a processor (not shown). The power supply unit supplies energy for emitting light to the light emitting device 210 and supplies power to each component for operation of the solar panel surface pollution measuring apparatus 200. The communication unit can transmit an output value according to the amount of light sensed by the light receiving element 220 to a processor outside the apparatus.

1 and 2, the apparatus 200 for measuring surface contamination of a solar cell panel may include an upper case 290. The light receiving element 220 is different from the first embodiment in that the light receiving element 220 is not exposed to the outside,

The processor can be disposed inside the lower case 270, and the degree of contamination can be measured based on the output value of the light receiving element 220. Specifically, the reference value is determined in advance based on the amount of light that has passed through the transmission window 230 with the transmittance of 100% and reaches the light receiving element 220. The output value calculated from the amount of light currently detected by the light receiving element 220 is compared to determine that the degree of contamination is high if the amount of light arriving at the light receiving element 220 is less than a certain standard. Through the above-described process, the processor determines the cleaning timing of the solar cell panel. In the case of the optical sensor 225 using a cadmium sulfide (CdS) element, if the amount of light reaching the optical sensor 225 is large, the resistance of the optical sensor 225 is lowered and the optical sensor 225 And outputs it to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. If the output resistance value is high, it is determined that the amount of light reaching the optical sensor 225 is small.

If the resistance value is higher than the reference value, it is determined that the degree of contamination is severe, and based on this, the cleaning time is determined.

As described above, the processor can calculate the reference value and the output value based on the current value using the photodiode, and it is possible to determine the degree of contamination and the cleaning time based on the reference value and the output value.

Referring to FIG. 7, there is a plurality of transmission windows 230. As described above with reference to FIG. 5, the light emitting device 210 can make a plurality of light paths using the semi-transparent mirror 160 and the total reflection mirror 170. On the basis of this, the path of light output from the light emitting device 210 can be directed toward one of the plurality of transmission windows 230. One of the plurality of transmission windows 230 has a cover 250. The cover 250 covering the transmission window 230 has only the light oil inlet 251 different from the cover 150 covered with the reflector 130 and does not have a separate light oil outlet. The transmission window 230 covering the cover 250 can be kept clean. Therefore, the reference value is set based on the value of the optical sensor 225 of the light receiving element 220 which senses the light passing through the transmission window 230 covered with the cover 250.

Conversely, the output value output from the light receiving element 220, which senses the light passing through the transmission window 230 not covered with the cover, is calculated. The processor measures the pollution degree of the solar panel based on the reference value and the output value, and determines the cleaning time.

The upper case 290 may have an opening 291 corresponding to the optical path and surrounds the light emitting element 210.

4A and 4B, the light emitting device 210 includes an optical filter, a convex lens, and a concave lens.

Hereinafter, the operation of the apparatus 200 for measuring surface contamination of the solar cell panel according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG.

Referring to FIG. 6, the light emitted from the light source 215 of the light emitting device 210 is adjusted in intensity through the optical filter, as in the operation of the apparatus for measuring surface contamination of the solar cell panel according to the first embodiment . The light passing through the optical filter passes through the convex lens and the concave lens, is condensed, and goes straight to the transmission window 230. At this time, the transmission window 230 can use glass having a transmittance close to 100%. The light transmitted by the transmission window 230 travels toward the light receiving element 220. The light passing through the transmission window reaches the light sensor 225 of the light receiving element 220.

Light reaching the light sensor 225 reduces the resistance of the light sensor 225 and applies a voltage across the resistance of the light sensor to measure the resistance value or the current value.

Based on the measured resistance value, the processor sets the resistance value or current value according to the degree of contamination as a reference value. For example, based on the resistance value, if the measured resistance is 1 ohm (ohms) and the resistance of the transmissive window 230 when the surface of the transmissive window 230 is contaminated by about 30% is 1.3 ohms, Set the 1.3 ohm (Ω) as the reference value.

A solar cell surface contamination measuring device 200 is installed on a solar cell panel, and after a predetermined time has elapsed, the resistance value is measured by the above-described method. In this case, external dust or foreign matter adheres to the transmission window 230, and the degree of transmission is reduced. If the contamination level of the surface exceeds 30%, the resistance measurement value becomes 1.3 (Ω) or more. At this time, the processor can notify that the cleaning time of the solar panel has come through an output unit such as a display (not shown).

Referring to FIG. 7, a plurality of transmission windows 230 are formed. The semitransparent mirror 160 and the total reflection mirror 170 of FIG. 5 are applied to the present invention. The semitransparent mirror 160 reflects a part of the light output from the light emitting device 210 to any one of the plurality of transmission windows 230 Towards one And reflects the output light. The total reflection mirror 170 refracts the light reflected by the semitransparent mirror 160 to the other one of the plurality of transmission windows 230 and proceeds. One of the plurality of transmission windows 230 is covered with a cover 250.

Any one of the light output from the light emitting device 210 proceeds to the transmission window 230 covered with the cover 250. The light output from the light emitting device 210 passes through the light oil inlet 251 of the cover 250 and enters the transmission window 230. The transmission window 230 preferably uses glass having a transmittance close to 100%. The light transmitted by the transmission window 230 travels toward the light receiving element 120 and reaches the light sensor 225 of the light receiving element 220.

Light reaching the optical sensor 225 reduces the resistance of the optical sensor 225 and applies a voltage across the resistance of the optical sensor to measure the resistance value. The processor sets the reference value based on this.

The other one of the lights outputted from the light emitting device 210 goes to the transmission window 230 where the cover 250 is not covered. The light transmitted by the transmission window 230 travels toward the light receiving element 220 and light reaches the light sensor 225 of the light receiving element 220.

Light reaching the light sensor 225 reduces the resistance of the light sensor 225 and applies a voltage across the resistance of the light sensor 225 to measure and output the resistance value.

The processor determines the degree of contamination based on the output resistance value and the reference value, as described above in the operation method of the embodiment of FIG.

Even when a plurality of light emitting devices 210 are provided, the processor obtains a reference value from the light receiving device 220 through which the light reaches the transmission window 230 covered by the cover 250. Also, the processor compares the resistance value output from the light-receiving element 220 to which the light transmitted from the transmission window 230, which is not covered with the cover 250, reaches a reference value to determine the degree of contamination. In this case, the processor can notify the cleaning time of the solar panel through an output unit such as a display (not shown) based on the determination of the contamination degree.

Hereinafter, the configuration of an apparatus for measuring surface contamination of a solar cell panel according to a third embodiment of the present invention will be described with reference to Figs. 8A to 9. Fig.

FIGS. 8A, 8B, 8C, and 8D are views showing a reflection film application pattern of a glass specimen of a solar cell panel surface contamination measuring device according to a third embodiment of the present invention, and FIG. FIG. 2 is a perspective view illustrating a solar cell surface contamination measuring device according to an embodiment of the present invention. FIG.

8A to 8D, a reflection film application pattern of the glass specimen will be described.

In Fig. 8A, half of the glass specimen 530 has a reflecting portion 531 coated with a reflective film, and the remaining half of the specimen 530 is composed of a transmitting portion 532. Fig. 8B, the reflection portion 531 and the transmission portion 532 are disposed. In Fig. 8C, the reflection portion 531 and the transmission portion 532 are arranged in a lattice pattern. In Fig. 8D, the reflective portion 531 and the transmissive portion 532 are arranged concentrically.

The patterns of the glass specimen representing the reflection portion 531 and the transmission portion 532 may be formed using a photolithography process.

Referring to FIG. 9, a solar panel surface contamination measuring apparatus 500 includes a light emitting element 510, a light receiving element 520, and a glass specimen 530.

The light emitting element 510 and the light receiving element 520 are the same as the light emitting element and the light receiving element in the above-described embodiments in the first and second embodiments.

The glass specimen 530 is composed of a reflecting portion 531 and a transmitting portion 532. The ultimate glass specimen 530 is composed only of the transmitting portion 532 having a transmittance close to 100%. Thereafter, a reflective film is deposited on the glass piece 530 to form a reflective portion 531. [ The reflective film is coated so that its reflectance approaches 100%. Therefore, the reflective portion 531 on which the reflective film of the glass specimen 530 is deposited has a reflectance close to 100%, and the transmissive portion 532 on which the reflective film is not deposited has a transmissivity close to 100%.

The light receiving element 520 is composed of a plurality of light receiving elements. The first light receiving element among the plurality of light receiving elements 520 is disposed below the transmissive portion 532 of the glass specimen 530 and the light sensor 526 of the first light receiving element is disposed below the transmissive portion 532 of the glass specimen 530 Respectively.

The second light-receiving element of the plurality of light-receiving elements 520 is disposed on one side of the base 540 and faces the light-emitting element 510. Between the second light receiving element and the light emitting element 510, the glass specimen 530 is positioned on the upper surface of the base 540.

The light emitting device 510 can divide the optical path using the translucent mirror 160 and the total reflection mirror 170, as in the embodiment of FIG. The light proceeding to one of the branched optical paths is referred to as a first light, and the other light is defined as a second light. When one of the first light and the second light is directed to the reflection portion 531 of the glass sample 530, the other of the first light and the second light is adjusted to be directed to the transmission portion 532 of the glass sample 530 .

Hereinafter, the operation of the apparatus 500 for measuring surface contamination of a solar cell panel according to the third embodiment of the present invention will be described with reference to FIG.

In the case of the embodiment of FIG. 9, the light output from the light emitting device 510 can be diverted using the translucent mirror 160 of FIG.

The semitransparent mirror 160 is located in an optical path of the light output from the light source 515 of the light emitting device 510 and divides the output light into the first light and the second light and transmits the first light, It reflects light.

The total reflection mirror 170 reflects the second light reflected from the semitransparent mirror.

One of the first and second lights is directed to the transmissive portion 532 and the other of the first and second lights is directed toward the reflective portion 531. In this case, the light transmitted through the transmissive portion 532 is sensed by the light sensor 526 of the first light receiving element located below the transmissive portion 532. Light reflected by the reflection part 531 proceeds to the second light receiving element, and light reflected by the light sensor 525 of the second light receiving element is sensed.

The reference value can be set by sensing the light transmitted through the transmission portion 532 and the light reflected by the reflection portion 531 before the glass specimen 530 is contaminated, as in the first and second embodiments described above. The processor compares the set reference value with the output value of the currently measured light receiving element 520 to determine the degree of contamination of the solar cell panel. Since the measurement is separately performed by the first light receiving element and the second light receiving element, the precision of the contamination degree measurement can be improved.

In addition, a plurality of lasers may be used. In this case, a cover may be covered with the glass specimen 530 as described above, and the measured output value may be used as a reference value. The solar cell panel surface contamination measuring apparatus 500 of FIG. 9 can have both a configuration for measuring the contamination degree using the reflector, which is the embodiment of FIG. 2, and a configuration for measuring the pollution degree using the transmission window, which is the embodiment of FIG. Further, when a plurality of light sources are used, one of the glass specimens 530 can cover the cover to measure the reference value at the same time.

Further, when the glass sample 530 is utilized as having a pattern as shown in Figs. 8A to 8D, it can be used in place of the reflector or the transmission window of the first to second embodiments. In this case, it can have an advantage that it can be precisely measured even if it is contaminated with small particles such as fine dust.

10 to 12B, a configuration of a solar cell panel for measuring contamination according to a fourth embodiment of the present invention will be described.

FIG. 10 is a perspective view showing a solar cell panel measuring contamination according to a fourth embodiment of the present invention, and FIG. 11 is a view showing that a solar cell according to a fourth embodiment of the present invention includes a further reflecting plate And FIGS. 12A and 12B are cross-sectional views showing the coupling relationship between the reflector and the solar cell module.

Referring to FIG. 10, a solar cell panel 300 for measuring contamination according to a fourth embodiment of the present invention includes a light emitting device 310, a light receiving device 320, and a reflector 330.

The light emitting device 310 is attached to one corner of the panel frame 370. The light emitting device 210 includes a light source 315 that outputs light. The light source 315 may be a rare light source that outputs laser light, but the type of the light source 315 is not limited thereto.

The light receiving element 320 is attached to one corner of the panel frame 370 and disposed to face the light emitting element 310. The light receiving element 320 includes an optical sensor 325 and senses light through the optical sensor 325. The light sensor 325 may include a device such as a cadmium sulfide (CdS) device whose resistance changes when light arrives. Thus, when light reaches the optical sensor 325, the value of the resistor can be transferred to the processor. The optical sensor 325 is not limited to the optical sensor described above. A sensor capable of outputting different values depending on the amount of light can be used as the optical sensor 325 of the light receiving element 320.

The reflector 330 is attached to one surface of the solar cell module 340 and reflects light output from the light emitting device 310. The light reflected by the reflector 330 reaches the light receiving element 320. The reflector 330 is used so that it can reflect the incident light with little loss. That is, the reflector 330 can use a front reflector whose reflectance is close to 100%.

The light output from the light emitting device 310 is reflected by the reflector 330 before the reflector 330 is contaminated with the external environment and is converted into a reference value of the pollution degree based on the output value according to the amount of light reaching the light receiving device 320 .

When the reflector 330 is contaminated or the contamination level is measured and cleaned, the reflector 330 can be replaced. In this regard, the coupling relationship of the reflector 330 will be described later. The light emitting device 310 and the light receiving device 320 may include an optical filter, a convex lens, and a concave lens as described above with reference to FIGS. 4A and 4B.

A power source (not shown), a communication unit (not shown), and a processor (not shown) may be included outside the solar cell. The power supply unit supplies energy for emitting light to the light emitting device 310 and supplies power to each component for measuring the pollution degree of the solar cell module. The communication unit can transmit an output value according to the amount of light sensed by the light receiving element 320 to a remote processor such as a control room.

The processor may be disposed around the solar panel 300 for measuring the contamination, and the pollution degree may be measured based on the output value of the light receiving element 320. Specifically, the output value calculated from the amount of light currently sensed by the light receiving element 320 is compared with a reference value previously measured and calculated in a reflector with a reflectance of 100%, and the amount of light reaching the light receiving element 320 Is less than the predetermined standard, it is determined that the pollution degree is high, and the cleaning timing of the solar cell module is determined. In the case of the optical sensor 325 using a cadmium sulfide (CdS) element, if the amount of light reaching the optical sensor 325 is large, the resistance of the optical sensor 325 is lowered and the optical sensor 325 And outputs it to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. If the output resistance value is high, it is determined that the amount of light reaching the optical sensor 325 is small. If the resistance value is higher than the reference value, it is determined that the degree of contamination is severe, and based on this, the cleaning time is determined.

When the optical sensor 325 measures the current value, the processor determines that the contamination degree is high when the current value sensed by the optical sensor is measured to be smaller than the reference value, and determines the cleaning time.

Referring to FIG. 11, a solar cell panel 300 for measuring contamination includes a plurality of light emitting devices 310, a plurality of light receiving devices 320, and a plurality of reflectors 330.

The light emitting device 310 may be coupled to the panel frame 370 and the hinge 312 so as to be inclined with respect to the surface of the solar cell module 340 and may include a rotating plate 311 to be rotatable by the panel frame 370 can do. The position of the light emitting element 310 may be adjusted so that the light emitted from the light emitting element 310 may be directed to the reflector 330.

The light receiving element 320 may be coupled to the panel frame 370 and the hinge 322 such that the light receiving element 320 is tilted with respect to the surface of the solar cell module 340 like the light emitting device 310, (321). It is possible to adjust the position of the light receiving element 320 so that the light reflected from the reflector 330 can reach the light receiving element 320.

A plurality of reflectors 330 may be disposed and disposed between the light emitting element 310 and the light receiving element 320. One of the plurality of reflectors 330 is encased in a cover 350.

The cover 350 surrounds one side of the reflector 330. 3, the cover 350 includes a light oil inlet and a light oil outlet so that light can pass therethrough. The mineral oil inlet and the mineral oil outlet are located on the light travel path. Therefore, the cover 350 does not interfere with the light travel path.

The cover 350 covers one side of the reflector 330. Therefore, when the apparatus for measuring the surface contamination of the solar panel is used, the reflector 330 with the cover 350 enclosed therein is not exposed to the external environment, .

The light output from the light emitting element 310 is reflected by the reflector 330 covered with the cover 350 and reaches the light receiving element 320. The reference value is set based on the output value of the light receiving element 320 that senses the light reflected by the reflector 330.

The processor compares the reference value and the output value to determine the degree of contamination. The method of determining the degree of contamination can be performed as in the method described above in Fig. That is, in the case of the optical sensor 325 using a cadmium sulfide (CdS) element, when the amount of light reaching the optical sensor 325 is large, the resistance of the optical sensor 325 is lowered, Value or current value to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. If the output resistance value is high or the current value is low, it is determined that the amount of light reaching the optical sensor 325 is small.

If the resistance value is higher than the reference value or the current value is lower than the reference value, the processor judges that the contamination degree is severe and determines the cleaning timing based on the judgment.

Referring to FIG. 12A, it can be seen that the reflector 330 has the fitting protrusion 331, and the solar cell module 340 has the fitting hole 342.

The fitting protrusion 331 of the reflector 330 may be inserted into the fitting hole 342 of the solar cell module 340 and fixed thereto. That is, the reflector 330 and the solar cell module 340 may be coupled to each other by a hook coupling method.

Referring to FIG. 12B, the reflector 330 includes a magnet 332.

The reflector 330 may be coupled to the solar cell module 340 with a magnet 332 included in the reflector. If the solar cell module 340 is made of a magnetic material, it can be magnetically coupled to the reflector 330. It is preferable to use a magnet 332 having a strong magnetic field so that the reflector 330 is fixed.

Since the reflector 330 is a consumable item, the reflector 330 can be replaced with a new reflector 330 after the cleaning time is determined by determining the degree of contamination by detachably attaching as shown in FIGS. 12A and 12B.

Hereinafter, the operation of the solar cell panel 300 for measuring contamination according to the third embodiment of the present invention will be described with reference to FIGS. 10 to 11. FIG.

The light output from the light emitting device 310 goes straight to the reflector 330. The reflector 330 reflects light at an angle of reflection equal to the incident angle of the incident light. At this time, the reflector 330 can use a front reflector whose reflectance is close to 100%. Light reflected by the reflector 330 travels toward the light receiving element 320, and light reaches the light sensor 325.

Light reaching the light sensor 325 reduces the resistance of the light sensor 325 and applies a voltage across the resistance of the light sensor 325 to measure the resistance value.

The processor sets the resistance value according to the degree of contamination as a reference value based on the measured resistance value. For example, if the measured resistance is 1 ohm (ohm) and the resistance of the reflector 130 surface is about 30% contaminated is 1.3 ohm (ohm), the processor sets the 1.3 ohm do.

After the reflector 330 is installed in the solar cell module, the resistance value is measured by the above-described method. In this case, external dust or foreign matter adheres to the reflector 330 and the reflectivity is lowered. If the contamination level of the surface is 30% or more, the resistance measurement value is 1.3 (Ω) or more. At this time, the processor can notify that the cleaning time of the solar cell module has come through an output unit such as a display (not shown).

When the optical sensor 325 measures the current value, the processor determines that the contamination degree is high when the current value sensed by the optical sensor is measured to be smaller than the reference value, and determines the cleaning time.

11, the light emitting device 310 is rotated by the panel frame 370 by the rotation plate 311, and the inclination of the light emitting device 310 with respect to one surface of the solar cell module 340 can be adjusted by the hinge 312. The position of the light emitting device 310 can be adjusted so that light can be reflected to be reflected by the reflector 330 covered with the cover 350 and light can be reflected to be reflected to the reflector 330 not covered with the cover.

In the case of having a plurality of light emitting devices 310, one light emitting device 310 advances the light to the reflector 330 covered with the cover 350, and the remaining light emitting device 310 is a reflector (330).

In addition, when one light emitting device is used, the light output from one light emitting device 310 can be divided into two by using a semitransparent mirror and a total reflection mirror as described above with reference to FIG. In this case, the translucent mirror reflects a part of the light output from the light emitting element toward one of the plurality of reflectors 330 And reflects the output light. The total reflection mirror refracts the light reflected by the semitransparent mirror to the other one of the plurality of reflectors 330 and proceeds. One of the plurality of reflectors 330 is covered with a cover 350.

One of the light output from the light emitting device 310 goes to the reflector 330 covered with the cover 350. The light output from the light emitting device 310 passes through the light oil inlet of the cover 350 and is incident on the reflector 330. The reflector 330 reflects light at an angle of reflection equal to the incident angle of the incident light. At this time, the reflector 330 can use a front reflector whose reflectance is close to 100%. The light reflected by the reflector 330 passes through the light oil outlet of the cover 350 and advances toward the light receiving element 320 to reach the light sensor 325.

Light reaching the light sensor 325 reduces the resistance of the light sensor 325 and applies a voltage across the resistance of the light sensor to measure the resistance value. The processor sets the reference value based on this.

The other one of the lights outputted from the light emitting device 310 goes to the reflector 330, which is not covered with the cover 350. The reflector 330 reflects light at an angle of reflection equal to the incident angle of the incident light. The light reflected by the reflector 330 travels toward the light receiving element 320. Light reflected by the reflector 33 reaches the light sensor 325 of the light receiving element 320. [

Light reaching the light sensor 325 reduces the resistance of the light sensor 325 and applies a voltage across the resistance of the light sensor to measure and output the resistance value.

The processor determines the degree of contamination based on the output resistance value and the reference value, as described above in the operation method of the embodiment of FIG.

The processor obtains the reference value from the light receiving element 320 through which the light reflected from the reflector 330 covered by the cover 350 reaches. In addition, the processor compares the resistance value output from the light-receiving element 320 to which the light reflected from the reflector 330, which is not covered with the cover 350, reaches a reference value to determine the degree of contamination. In this case, the processor can notify the cleaning timing of the solar cell module through an output unit such as a display (not shown) based on the determination of the degree of contamination.

Hereinafter, the configuration of the solar cell panel for measuring contamination according to the fifth embodiment of the present invention will be described with reference to Figs. 13 and 14. Fig.

FIG. 13 is a perspective view showing a solar cell according to a fourth embodiment of the present invention, and FIG. 14 is a perspective view showing that a solar cell according to a fourth embodiment of the present invention further includes a transparent plate.

Referring to FIG. 13, a solar cell panel 400 for measuring contamination includes a light emitting device 410, a light receiving device 420, and a transmission window 430.

The light emitting element 410 is attached to one corner of the panel frame 470. The light emitting device 410 includes a light source 415 that outputs light. The light source 415 may be a rare light source that outputs laser light as described above with reference to FIG. 1, but the type of the light source 415 is not limited thereto. The light emitting element 410 may be fastened by a "C" shaped latch 480 and a screw 490 to be fixed to the panel frame 470. The fastening method is not limited to this, and it is possible that the fastening method is such that the light emitting element 410 can be fastened. 10 and 11, the light emitting device 310 and the light receiving device 320 may be similarly coupled.

Although not shown in FIGS. 10 and 11, the "C" shaped latch 480 and the screw 490 are provided on the solar cell panel 300 for measuring contamination according to the fourth embodiment of FIGS. 10 and 11, The light emitting element 310 and the light receiving element 320 of FIG.

In addition, the "C" -shaped latch 480 and the screw 490 are also applied to a plurality of light emitting devices 410 of FIG. 14 to be described later.

The light receiving element 420 is attached to one surface of the solar cell module 440 or embedded in one surface of the solar cell module 440. The light sensor 425 of the light receiving element 420 may be disposed to be exposed on one side of the solar cell module 440. The light sensor 425 detects the amount of light reaching the light receiving element 420. The transmission window 430 is disposed on the upper surface of the light receiving element 420 and allows light output from the light emitting element 410 to pass through the light receiving element 420. It is preferable that the transmission window 430 is made of glass having a light transmittance close to 100%.

The light output from the light emitting device 410 passes through the transmission window 430 and reaches the light receiving device 420 before the transmission window 430 is contaminated with the external environment, The reference value is determined. At this time, the reference value of the pollution degree can be determined by calculating an output value when the reflector is contaminated to a certain degree.

The transmission window 430 is projected on one side of the solar cell module 440 but the present invention is not limited thereto and the transmission window 430 may be in the form of being embedded in the solar cell module 440. [ . The transmission window 430 is detachably attachable to the solar cell module, like the reflector 330 of Figs. 12a and b.

A power source (not shown), a communication unit (not shown), and a processor (not shown) may be included outside the solar cell panel 400 for measuring contamination. The power supply unit supplies energy for emitting light to the light emitting device 410 and supplies power to each component for measuring contamination of the solar cell panel 400 for measuring the contamination. The communication unit can transmit an output value according to the amount of light sensed by the light receiving element 420 to a processor outside the apparatus.

The processor may be disposed near the solar panel 400 for measuring the contamination or may be disposed in a remote control room and may measure the contamination degree based on the output value of the light receiving element 420. Specifically, the reference value is determined in advance based on the amount of light that has passed through the transmission window 430 with the transmittance of 100% and reaches the light receiving element 420. The output value calculated from the amount of light sensed by the light receiving element 420 is compared to determine that the degree of contamination is high if the amount of light reaching the light receiving element 420 becomes less than a certain standard. After the process described above, the processor determines the cleaning time of the solar cell module. In the case of the optical sensor 425 using a cadmium sulfide (CdS) element, when the amount of light reaching the optical sensor 425 is large, the resistance of the optical sensor 425 is lowered, and the optical sensor 425 And outputs it to the process as an output value. The process compares the output value with the reference value to determine the degree of contamination. If the output resistance value is high, it is determined that the amount of light reaching the optical sensor 425 is small.

If the resistance value is higher than the reference value, it is determined that the degree of contamination is severe, and based on this, the cleaning time is determined.

Referring to FIG. 14, there is a plurality of transmission windows 430. 7, the light emitting device 410 rotates in the panel frame 470 by the rotation plate 411 and can change the tilt of the solar cell module 440 with respect to one surface of the solar cell module 440 by the hinge 412 have. On the basis of this, the path of the light emitted from the light emitting device 410 can be directed toward one of the plurality of transmission windows 430. One of the plurality of transmission windows 430 has a cover 450. Unlike the cover 450 which is covered by the transmission window 430, the cover 450 which is covered by the transmission window 430 has only a light oil inlet and does not have a separate light oil outlet. The transmission window 430 covering the cover 450 can be kept clean. Therefore, the reference value is set based on the value of the optical sensor 425 of the light receiving element 420 which senses the light passing through the transmission window 430 covered with the cover 450.

On the contrary, the output value output from the light receiving element 420 which senses the light passing through the transmission window 430 not covered with the cover is calculated. The processor measures the pollution degree of the solar cell module based on the reference value and the output value, and determines the cleaning time.

Although not shown in Fig. 14, as described above with reference to Fig. 5, the light traveling path can be branched by using a semitransparent mirror and a total reflection mirror. It is possible to simultaneously calculate the reference value and the output value by adjusting the amount of each light traveling along the movement path of the branched light to be constant.

The light emitting element 410 is coupled to the panel frame 470 with the latch 480 and the screw 490 of the "C" shape as shown in FIG.

4A and 4B, the light emitting device 410 includes an optical filter, a convex lens, and a concave lens, and the light receiving element 410 may include an optical filter, a convex lens, and a concave lens.

Hereinafter, the operation of the solar cell panel 400 for measuring contamination according to the fifth embodiment of the present invention will be described with reference to FIGS. 13 and 14. FIG.

Referring to FIG. 13, light emitted from the light source 415 of the light emitting device 410 can be controlled in intensity through an optical filter, as in the operation of the solar cell according to the third embodiment. The light passing through the optical filter passes through the convex lens and the concave lens, is condensed, and goes straight to the transmission window 430. At this time, the transmission window 430 can use glass having a transmittance close to 100%. The light transmitted by the transmission window 430 travels toward the light receiving element 420. The light passing through the transmission window reaches the optical sensor 425 of the light receiving element 420.

Light reaching the light sensor 425 reduces the resistance of the light sensor 425 and applies a voltage across the resistance of the light sensor to measure the resistance value or the current value.

The processor sets the resistance value according to the degree of contamination as a reference value based on the measured resistance value. For example, if the measured resistance is 1 ohm (ohm) and the resistance of the transmission window 430 surface is about 30% contaminated by 1.3 ohms (ohms), then the processor will assume 1.3 ohms Setting.

After a certain period of time has elapsed after the transmission window 430 is installed in the solar cell module 440, the processor measures the resistance value by the above-described method. In this case, external dust or foreign matter adheres to the transmission window 430 and the transmittance is lowered. If the contamination level of the surface exceeds 30%, the resistance measurement value becomes 1.3 (Ω) or more. At this time, the processor can notify that the cleaning time of the solar cell module has come through an output unit such as a display (not shown).

Referring to FIG. 14, a plurality of transmission windows 430 are formed. The light emitting device 410 is rotated by the panel frame 470 by the rotating plate 411 and can adjust the inclination of the light emitting device 410 with the one surface of the solar cell module 440 by the hinge 412. The light emitted from the light emitting device can be transmitted through the transmission window 430 covered with the cover 450 and transmitted through the transmission window 430 not covered with the cover.

One light emitting device 410 advances the light to the transmission window 430 covered with the cover 450 and the remaining light emitting device 410 advances the light to the transmission window 430 not covered with the cover.

Although not shown in FIG. 14, when the semitransparent mirror 160 and the total reflection mirror 170 of FIG. 5 are applied to the present invention, the semitransparent mirror 160 separates a part of the light output from the light emitting element 110 into a plurality of transmission windows Lt; RTI ID = 0.0 > 430 < / RTI & And reflects the output light. The total reflection mirror 170 refracts the light reflected by the semitransparent mirror 160 to the other one of the plurality of transmission windows 430 and proceeds. One of the plurality of transmission windows 430 is covered with a cover 450.

One of the light output from the light emitting device 410 goes to the transmission window 430 covered with the cover 450. The light output from the light emitting device 410 is incident on the transmission window 430 through the optical oil inlet of the cover 450. It is preferable that the transmission window 430 uses glass having a transmittance close to 100%. The light transmitted by the transmission window 430 travels toward the light receiving element 420 and reaches the light sensor 425 of the light receiving element 420.

The light reaching the light sensor 425 reduces the resistance of the light sensor 425 and applies a voltage across the resistance of the light sensor to measure the resistance value. The processor sets the reference value based on this.

The other one of the lights output from the light emitting device 410 goes to the transmission window 430 where the cover 450 is not covered. Light transmitted by the transmission window 430 travels toward the light receiving element 420, and light reaches the light sensor 425 of the light receiving element 420.

Light reaching the light sensor 425 reduces the resistance of the light sensor 425 and applies a voltage across the resistance of the light sensor 425 to measure and output the resistance value.

The processor determines the degree of contamination based on the output reference value, as described above in the method of operation of the embodiment of FIG.

Even when a plurality of light emitting devices 210 are provided, the processor obtains a reference value from the light receiving device 220 through which the light reaches the transmission window 230 covered by the cover 250. Also, the processor compares the resistance value output from the light-receiving element 220 to which the light transmitted from the transmission window 230, which is not covered with the cover 250, reaches a reference value to determine the degree of contamination. In this case, the processor can notify the cleaning timing of the solar cell module through an output unit such as a display (not shown) based on the determination of the degree of contamination.

If the optical sensor 425 measures the current value, the processor determines that the contamination degree is high when the current value sensed by the optical sensor is measured to be smaller than the reference value, and determines the cleaning time.

The glass specimen 530 of Figs. 8A to 8D can be applied to the solar cell panel for measuring the contamination according to the fourth embodiment of Figs. 10 and 11, and the contamination according to the fifth embodiment of Figs. 13 and 14 The present invention can be applied to a solar cell panel that measures a solar cell.

When the glass specimen 530 is utilized as having a pattern as shown in Figs. 8A to 8D, it can be used in place of the reflector or the transmission window of the fourth to fifth embodiments. In this case, it can have an advantage that it can be precisely measured even if it is contaminated with small particles such as fine dust.

As described above, the processor can determine the degree of contamination by comparing the output value calculated based on the light sensed by the light-receiving element in advance, by setting the reference value in advance, and by using the reflector, the transmission window, or the glass specimen , And at the same time, the reference value and the output value are obtained and compared to determine the degree of contamination.

The apparatus for measuring surface contamination of a solar cell panel and the solar cell panel according to an embodiment of the present invention can determine the pollution degree of the solar cell module to appropriately inform the cleaning timing of the solar cell panel and various methods for measuring the reference value Precise contamination measurement is possible.

In addition, the glass specimen coated with various patterns can improve the precision of measuring the degree of contamination by fine particles such as fine dust.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

100,200,500: Solar panel surface contamination measuring device
300, 400: solar cell panel
110, 210, 310, 410, 510:
120, 220, 320, 420, 520: Light receiving element
130, 330: reflector
230, 430: Transmission window
530: Glass Specimen

Claims (15)

Base;
A light emitting element located at one end of the one surface of the base to output light;
A light receiving element located at the other end of the one surface of the base;
A reflector disposed on one side of the base and reflecting the output light to the light receiving element; And
And a processor for determining a degree of contamination based on an amount of light sensed by the light receiving element,
Wherein the light receiving element and the reflector are plural,
Wherein one of the plurality of reflectors is enclosed in a cover,
Wherein the cover includes a cavity corresponding to an optical path. The method according to claim 1,
The processor comprising:
The output value of the light receiving element which senses the light reflected from the reflector in the predetermined state is set as a reference value and the output value of the light receiving element which senses the light reflected by the reflector in the state at the measuring time is compared with the reference value, A device for measuring solar panel surface contamination. delete The method according to claim 1,
A plurality of reflectors disposed in the optical path, wherein a portion of the light output from the light emitting device is directed toward one of the plurality of reflectors A semi-transparent mirror for reflecting the output light; And
And a total reflection mirror for refracting the light reflected by the translucent mirror to another one of the plurality of reflectors. The method according to claim 1,
Wherein the light emitting device includes a lens unit that condenses and outputs the light so as to pass through the cavity. The method according to claim 1,
The light emitting element is controlled so that the output light is directed toward the reflector,
Wherein the light receiving element is adjusted so that light reflected from the reflector is sensed. Base;
A light emitting element located at one end of the one surface of the base to output light;
A light receiving element located on one side of the base;
A transmission window covering the upper surface of the light-receiving element and transmitting the output light to the light-receiving element;
And a processor for determining a degree of contamination based on an amount of light sensed by the light receiving element,
Wherein the light receiving element and the transmission window are plural,
Wherein one of the plurality of transmissive windows is enclosed by a cover,
Wherein the cover includes a cavity corresponding to an optical path. delete 8. The method of claim 7,
A translucent mirror positioned in the optical path for passing a part of the light output from the light emitting element toward one of the plurality of transmission windows and reflecting the output remaining light; And
And a total reflection mirror for refracting the light reflected by the semi-transparent mirror to the other one of the plurality of transmission windows. 8. The method of claim 7,
Wherein the light emitting device includes a lens unit that condenses and outputs the light so as to pass through the cavity. Base;
A light emitting element located at one end of the base and outputting light;
A first light receiving element located on one side of the base;
A second light receiving element located at the other end of the one surface of the base;
A glass specimen positioned on an upper surface of the first light receiving element and including a reflection part for reflecting the output light and a transmission part for transmitting the light;
A processor for determining the degree of contamination based on the amount of light sensed by the first and second light receiving elements;
A semitransparent mirror positioned at an optical path of light output from the light emitting device, for diverting the output light into first light and second light, transmitting the first light, and reflecting the second light; And
And a total reflection mirror for reflecting the second light reflected from the translucent mirror,
Wherein one of the first and second lights is directed to the transmissive portion and the other of the first and second lights is directed to the reflective portion. delete Panel frame;
A solar cell module located inside the panel frame;
A reflector detachably coupled to an upper surface of the solar cell module;
A light emitting element located at one corner of the panel frame and outputting light, the output light being adjusted to face the reflector;
A light receiving element positioned at the other corner of the panel frame facing the light emitting element and being adjusted to sense light reflected from the reflector; And
And a processor for determining a degree of contamination based on an amount of light sensed by the light receiving element,
Wherein the light receiving element and the reflector are plural,
Wherein one of the plurality of reflectors is enclosed in a cover,
Wherein the cover includes a cavity corresponding to an optical path. Panel frame;
A solar cell module located inside the panel frame;
A light receiving element located on one surface of the solar cell module;
A transmission window that surrounds the upper surface of the light receiving element;
A light emitting element located at one corner of the panel frame to emit light and being controlled so that the output light passes through the transmission window and reaches the light receiving element; And
And a processor for determining a degree of contamination based on an amount of light sensed by the light receiving element,
Wherein the light receiving element and the transmission window are plural,
Wherein one of the plurality of transmissive windows is enclosed by a cover,
Wherein the cover includes a cavity corresponding to an optical path. Panel frame;
A solar cell module positioned inside the panel frame;
A light emitting element located at one corner of the panel frame and outputting light;
A first light receiving element located on one surface of the solar cell module;
A second light receiving element located at the other corner of the panel frame;
A glass specimen including a reflective portion surrounding the upper surface of the first light receiving element and reflecting the output light, and a transmissive portion transmitting the light; And
And a processor for determining the degree of contamination based on the amount of light sensed by the first and second light receiving elements,
A semitransparent mirror positioned at an optical path of light output from the light emitting device, for diverting the output light into first light and second light, transmitting the first light, and reflecting the second light; And
And a total reflection mirror for reflecting the second light reflected from the translucent mirror,
Wherein one of the first and second light is directed to the transmissive portion and the other of the first and second light is directed to the reflective portion.

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