JP2022068556A - Inspection device for concentrating photovoltaic power generation module and inspection method - Google Patents

Abstract

To efficiently and easily inspect a concentrating photovoltaic power generation module.SOLUTION: The present invention relates to an inspection device 200 for a concentrating photovoltaic power generation module which is an aggregate of optical units in which sunlight is converged by a first condenser lens (Fresnel lens 12f) and guided to a light receiving section. The inspection device comprises: a second condenser lens (Fresnel lens 41) which is opposed with the first condenser lens on an extension of an optical axis of the optical unit and whose focal position is reverse to that of the first condenser lens; and a camera 40 which captures a real image formed by converging parallel light which arrives from the light-receiving section via the first condenser lens, by the second condenser lens.SELECTED DRAWING: Figure 13

Description

The present disclosure relates to an inspection device and an inspection method for a concentrating photovoltaic module.

The condensing type photovoltaic power generation device has a basic configuration of an optical unit that collects sunlight by a condensing lens and causes it to be incident on a light receiving portion including a small cell for power generation. The concentrating photovoltaic power generation module is a matrix of these optical units arranged in a housing. Further, a large number of the concentrating solar power generation modules are arranged side by side to form an array (panel), which becomes one condensing type photovoltaic power generation device. In order to track the sun, the tracking pedestal on which the array is mounted is supported by a support column so that it can be driven in two axes of azimuth and elevation (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-226205

In a concentrating photovoltaic power generation device, the condensed sunlight becomes extremely strong light, so after many years of use, for example, the transparent silicone resin used around the cell of the light receiving part deteriorates, and the transparency becomes high. It may turn into a low blackish or whitish color. When the transparency decreases, it becomes difficult for the collected sunlight to reach the cell. In addition, discoloration may occur in the condenser lens. If the number of such defective optical units is small, there is no particular problem, but as the number increases, the amount of power generation decreases, so it is necessary to replace each module.

However, in order to inspect whether the color has changed, a worker in a gondola such as an aerial work platform looks up at the array from below with the light receiving surface of the array facing down. Become. Such inspection work takes time (man-hours) and is not efficient. In addition, the physical burden on the workers is heavy.

In view of such a problem, it is an object of the present disclosure to enable an efficient and easy inspection of a concentrating photovoltaic power generation module.

The present disclosure includes the following inventions. However, the present invention is defined by the scope of claims.

The present disclosure is an inspection device for a condensing photovoltaic power generation module, which is an aggregate of optical units that condense sunlight by a first condensing lens and guide it to a light receiving unit.
A second condenser lens that is on an extension of the optical axis of the optical unit and faces the first condenser lens and has a focal position opposite to that of the first condenser lens.
A camera that captures a real image formed by condensing parallel light that arrives from the light receiving unit via the first condensing lens by the second condensing lens.
It is equipped with.

Further, the present disclosure is an inspection method for a condensing type solar power generation module, which is an aggregate of optical units that condense sunlight by a first condensing lens and guide it to a light receiving portion.
A second condenser lens whose focal position is opposite to that of the first condenser lens is positioned on an extension of the optical axis of the optical unit and faces the first condenser lens.
The parallel light arriving from the light receiving unit via the first condenser lens is condensed by the second condenser lens and photographed by a camera as a real image.
This is an inspection method for concentrating photovoltaic modules.

According to the present disclosure, the concentrating photovoltaic module can be inspected efficiently and easily.

FIG. 1 is a perspective view of an example of a concentrating photovoltaic power generation device for one unit as viewed from the light receiving surface side. FIG. 2 is a perspective view of an example of a concentrating solar power generation device for one unit as viewed from the light receiving surface side, and shows the concentrating solar power generation device in a state during assembly. FIG. 3 is a perspective view showing an example of the configuration of the concentrating photovoltaic power generation module. FIG. 4 is an exploded perspective view of the concentrating photovoltaic power generation module. FIG. 5 is a cross-sectional view showing an example of an optical unit as a basic configuration of an optical system constituting a concentrating photovoltaic power generation module. FIG. 6A is an enlarged perspective view of a light receiving portion at one location, and FIGS. 6B and 6C are exploded perspective views of FIG. 6A. FIG. 7 is a diagram showing a schematic shape of the light receiving portion of the optical unit when viewed from the outside. FIG. 8 is a reference diagram showing an example of the positional relationship between the array that tracks the sun and the camera. FIG. 9 is an optical schematic diagram showing how the light receiving portion looks through a Fresnel lens (shown in the shape of a plano-convex spherical lens) in one optical unit as a reference. FIG. 10 is a diagram showing the optical principle of the inspection device of the concentrating photovoltaic power generation module of the present disclosure. FIG. 11 is a perspective view showing an example of a drone aircraft. FIG. 12 is a perspective view showing the controller of the drone. FIG. 13 is a diagram showing an inspection device including a drone. FIG. 14 is two examples of a front view of the Fresnel lens viewed from the tip end side of the support. FIG. 15 is an example of an image of the light receiving portion in a normal state. FIG. 16 is an example of an image of a light receiving portion in an abnormal state. FIG. 17 is a diagram showing another embodiment of the inspection device. FIG. 18 is a diagram showing an example in which the support of the Fresnel lens is an arm.

[Explanation of Embodiments of the present disclosure]
The embodiments of the present disclosure include at least the following as a gist thereof.

(1) The present disclosure is an inspection device for a condensing type solar power generation module, which is an aggregate of optical units that condense sunlight by a first condensing lens and guide it to a light receiving portion, and the optics thereof. A second condenser lens that is on an extension of the optical axis of the unit and faces the first condenser lens and whose focal position is opposite to that of the first condenser lens, and the first collection from the light receiving unit. It includes a camera that captures a real image formed by condensing parallel light that reaches through an optical lens by the second condensing lens.

With the inspection device configured in this way, since the light receiving portion can be photographed as a real image, the light receiving portion can be photographed more clearly. Therefore, the concentrating photovoltaic module can be inspected efficiently and easily.

(2) The inspection device of (1) may include the second condenser lens and an unmanned flying object that supports the camera at a predetermined position in the air.
In this case, using, for example, a drone as an unmanned aerial vehicle, the process of shooting while hovering and moving to the next shooting position after shooting is repeated, and a large number of optical units can be shot.

(3) The inspection device according to (1) or (2) has, for example, a cylindrical support having one end attached to the camera and the other end supporting the second condenser lens.
In this case, the mutual positional relationship between the camera and the second condenser lens is fixed by the support, and a stable image formation can be obtained on the camera. In addition, it is possible to prevent light that is not from the second condenser lens from entering the camera.

(4) The inspection device according to (1) or (2) includes, for example, an arm-shaped support having one end attached to the camera and the other end supporting the second condenser lens.
In this case, the mutual positional relationship between the camera and the second condenser lens is fixed by the support, and a stable image formation can be obtained on the camera. Further, since the support has an arm shape, it is easy to finely adjust the mutual positional relationship.

(5) In any of the inspection devices (1) to (4), the first condenser lens and the second condenser lens are both Fresnel lenses, which are opposite to the surface on which the Fresnel lens is processed. It may be configured such that the faces face each other.
The Fresnel lens makes it possible to reduce the weight of the second condenser lens and facilitate support in the air.

(6) In any of the inspection devices (2) to (5), the camera, the support, and the second condenser lens are evenly spaced in the horizontal circumferential direction around the unmanned flying object. A plurality of sets may be arranged in.
In this case, the unmanned vehicle is easy to balance the weight and is suitable for hovering in a horizontal attitude.

(7) Further, the present disclosure is an inspection method for a condensing type solar power generation module, which is an aggregate of optical units that condense sunlight by a first condensing lens and guide it to a light receiving portion. The second condensing lens whose focal position is opposite to that of the first condensing lens is positioned on an extension of the optical axis of the optical unit and faces the first condensing lens to receive the light. The parallel light arriving from the unit via the first condenser lens is focused by the second condenser lens and photographed by a camera as a real image.

According to such an inspection method, since the light receiving portion can be photographed as a real image, the light receiving portion can be photographed more clearly. Therefore, the concentrating photovoltaic module can be inspected efficiently and easily.

[Details of Embodiments of the present disclosure]
Hereinafter, an example of a concentrating photovoltaic power generation module (hereinafter, also simply referred to as a module) to which the inspection device and the inspection method of the present disclosure is applied will be described with reference to the drawings.

<< Concentrated solar power generation device >>
1 and 2 are perspective views of an example of a concentrating photovoltaic power generation device 100 for one unit as viewed from the light receiving surface side, respectively. FIG. 1 shows a concentrating photovoltaic power generation device 100 in a completed state, and FIG. 2 shows a concentrating photovoltaic power generation device 100 in a state in the middle of assembly. FIG. 2 shows a state in which the skeleton of the gantry portion 25 of the tracking pedestal 2 can be seen in the right half, and a state in which the module 1M is attached is shown in the left half. When actually attaching the module 1M to the tracking pedestal 2, the pedestal portion 25 is attached while lying on the ground.

In FIG. 1, the concentrating solar power generation device 100 includes an array (solar power generation panel) 1 having a shape continuous on the upper side and divided into left and right on the lower side, and a tracking stand 2. The array 1 is configured by arranging the modules 1M on the gantry portion 25 (FIG. 2) on the rear side. In the example of FIG. 1, the array 1 is an aggregate of 200 modules 1M in total, consisting of (96 (= 12 × 8) × 2) pieces constituting the left and right wings and 8 pieces in the central crossover portion. It is configured.

The tracking pedestal 2 supports the array 1 and changes the posture of the array 1 so as to track the sun. The tracking pedestal 2 includes a support column 21, a foundation 22, a two-axis drive unit 23, a horizontal axis 24 (FIG. 2) as a drive axis, and a gantry unit 25. The lower end of the support column 21 is fixed to the foundation 22, and the upper end is provided with a two-axis drive unit 23.

In FIG. 1, the foundation 22 is firmly buried in the ground so that only the upper surface can be seen. With the foundation 22 buried in the ground, the columns 21 are vertical and the horizontal axis 24 (FIG. 2) is horizontal. The two-axis drive unit 23 can rotate the horizontal axis 24 in two directions, an azimuth angle (an angle with the support column 21 as the central axis) and an elevation angle (an angle with the horizontal axis 24 as the central axis). In FIG. 2, a reinforcing material 25a is attached to the horizontal shaft 24. Further, a plurality of horizontal rails 25b are attached to the reinforcing material 25a. Therefore, if the horizontal axis 24 rotates in the direction of the azimuth angle or the elevation angle, the array 1 also rotates in that direction.

Although FIGS. 1 and 2 show the tracking pedestal 2 in which the array 1 is supported by one support column 21, the configuration of the tracking pedestal 2 is not limited to this. In short, the array 1 may be configured to be movable in two axes (azimuth angle, elevation angle).

<< Module configuration example >>
FIG. 3 is a perspective view showing an example of the configuration of the module 1M. In the figure, the module 1M includes, as a physical form in appearance, a flat-bottomed container-shaped housing 11 having a rectangular contour in a plan view, and a light collecting portion 12 attached on the housing 11 like a lid. ing. The housing 11 is made of resin, for example. The light collecting unit 12 is configured, for example, by attaching a resin Fresnel lens 12f to the back surface of one transparent glass plate 12a. For example, each of the square (10 × 14) sections shown in the figure is a Fresnel lens 12f, and sunlight can be focused on the focal position.

FIG. 4 is an exploded perspective view of the module 1M. The module 1M has a housing 11 with a shielding plate 14 mounted on the housing 11 and a light collecting unit 12 mounted on the housing 11. A strip-shaped flexible printed wiring board 13 is provided on the bottom surface 11a. A power generation element (cell) described later is mounted at a predetermined position on the flexible printed wiring board 13. In FIG. 4, the portion of the two-dot chain line surrounded by “◯” is the light receiving portion R including the power generation element.

The light receiving portions R are arranged on the flexible printed wiring board 13 at equal intervals, and are provided in the same number and at the same interval corresponding to each Fresnel lens 12f of the condensing portion 12. A shielding plate 14 is provided between the light receiving unit R and the light collecting unit 12. The shielding plate 14 is formed with an opening 14a at a position corresponding to the optical axis of each Fresnel lens 12f. The light converged by the Fresnel lens 12f passes through the aperture 14a. When the incident direction of sunlight and the optical axis of the light receiving portion R are greatly deviated, the light to be collected at the deviated position hits the shielding plate 14.

<< Configuration example of optical unit >>
FIG. 5 is a cross-sectional view showing an example of an optical unit 1U as a basic configuration of an optical system constituting the module 1M. It should be noted that each part shown in FIG. 5 is enlarged as appropriate for the convenience of structural explanation, and is not necessarily a diagram proportional to the actual dimensions.

In FIG. 5, when the optical unit 1U faces the sun and the incident angle of the sunlight is 0 degrees, the ball lens 30 and the cell (power generation element) 33 of the light receiving unit R are placed on the optical axis Ax of the Fresnel lens 12f. There is. The light collected by the Fresnel lens 12f passes through the opening 14a of the shielding plate 14, enters the ball lens 30 of the light receiving portion R, and is guided to the cell 33.

In FIG. 5, the light receiving portion R includes a ball lens 30, a resin cell package 31, a protective plate 32, a cell 33, and a sealing portion 34. The cell package 31 is provided so as to surround the cell 33. The cell package 31 has, for example, a square cylinder or a cylinder, and may be made of resin, glass, or metal. The light receiving portion R is mounted on the flexible printed wiring board 13. A bypass diode is connected in parallel to the cell 33, but the illustration is omitted here.

The ball lens 30 is supported by the inner peripheral edge 31e of the upper end portion of the cell package 31 so as to form a gap in the optical axis Ax direction with the cell 33. The sealing portion 34 is a light-transmitting resin, for example, a silicone resin, and is provided so as to fill the space formed between the lower portion of the ball lens 30 and the cell 33 inside the cell package 31. When the sealing portion 34 deteriorates due to long-term use, its transparency decreases.

<< Configuration example of the light receiving part >>
FIG. 6A is an enlarged perspective view of the light receiving portion R at one location. (B) and (c) in FIG. 6 are exploded perspective views of (a). First, as shown in (c), a cell package 31 having a cell 33 built in is attached to a wide portion of one flexible printed wiring board 13. As shown in (b), the ball lens 30 is placed on the cell package 31 via a silicone resin. A protective plate 32 is placed and adhered on the ball lens 30. In this way, the state shown in (a) is obtained. The protective plate 32 is, for example, an annular metal body, and a commercially available washer can be used. The protective plate 32 prevents the focused light from causing thermal damage to the periphery of the cell when the focused light of sunlight deviates from the ball lens 30.

FIG. 7 is a diagram showing a schematic shape of the light receiving portion R of the optical unit 1U when viewed from the outside. When the light receiving portion R is viewed from the outside through the Fresnel lens 12f, a virtual image as if the light receiving portion R is magnified with a magnifying glass can be seen. The inner circle C1 in FIG. 7 is the contour of the head of the ball lens 30 exposed from the protective plate 32. The circle C2 is the contour of the protective plate 32. If the Fresnel lens 12f, the ball lens 30, and the sealing portion 34 are in good condition, the inside of the circle C1 looks blackish but transparent, and the surface of the cell 33 can be seen. On the contrary, when the Fresnel lens 12f, the ball lens 30, and the sealing portion 34 are deteriorated, the inside of the circle C1 looks cloudy and the surface of the cell 33 cannot be seen well.

As described above, it is not easy for the operator to visually inspect each optical unit 1U because the efficiency is low and the physical burden on the operator is heavy. Therefore, consider taking a picture of the optical unit 1U with a camera supported in the air. The method of supporting the camera in the air will be described later, but first, the basic concept will be explained.

<< Example of the optical principle of inspection equipment >>
FIG. 8 is a reference diagram showing an example of the positional relationship between the array 1 that tracks the sun and the camera 40. In the figure, the array 1 faces the sun at an elevation angle θ (for example, 20 degrees), and the incident angle of the sunlight on the surface of the array 1 is 0 degrees. The camera 40 is on the extension of the normal NL with respect to the surface of the array 1, and the shooting direction is directed to the array 1.

FIG. 9 is an optical schematic diagram showing how the light receiving portion R looks through the Fresnel lens 12f (shown in the shape of a plano-convex spherical lens) in one optical unit 1U for reference. The Fresnel lens 12f and the light receiving portion R are on a common optical axis Ax. The light reflected from the surface of the light receiving unit R due to the scattering of sunlight focused toward the light receiving unit R radiates parallel light via the Fresnel lens 12f as shown in the figure. When this parallel light is captured by the camera 40 (FIG. 8), the virtual image IR of the light receiving unit R is captured by the camera 40. However, since it is a virtual image, the image taken by the camera 40 is not clear.

FIG. 10 is a diagram showing the optical principle of the inspection device of the concentrating photovoltaic power generation module of the present disclosure. In the figure, the arrangement of the light receiving portion R and the Fresnel lens 12f is the same as in FIG. In FIG. 10, a camera 40 and a Fresnel lens 41 (shown in the shape of a plano-convex spherical lens) are further arranged on a common optical axis Ax. The Fresnel lens 41 is a member on the camera 40 side. The Fresnel lens 41 faces the Fresnel lens 12f. The focal point F1 of the Fresnel lens 12f and the focal point F2 of the Fresnel lens 41 are opposite to each other on the optical axis Ax.

The focal length L1 of the Fresnel lens 12f and the focal length L2 of the Fresnel lens 41 may have a relationship of L1 = L2, or may have different values. The distance L3 between the pair of Fresnel lenses 12f and 41 is not particularly limited in principle, but is preferably 30 cm or more and 1 m or less in order to prevent contact with each other and facilitate shooting. The light focused on the focal length F2 by the Fresnel lens 41 is imaged as a real image RR at a position separated from the focal length L4 of the camera 40 by the focal length L4, and is photographed by the camera 40.

<< Specific examples of actual inspection equipment >>
Next, a specific example of an actual inspection device will be described. As a device for supporting the camera 40 and the Fresnel lens 41 in the air, for example, an unmanned flying object can be used. A typical example of an unmanned aerial vehicle is a drone.

FIG. 11 is a perspective view showing an example of the drone aircraft 50 (hereinafter, simply referred to as a drone). The drone 50 is composed of a machine body 51, four frame arms 52 extending from the machine body 51 in four outward directions, a motor 53 attached to the tips of each of the four frame arms 52, and a motor 53. It is equipped with a rotating propeller 54 and a landing gear 55. The machine body 51 contains a battery, a communication device, a control device, a GPS (Global Positioning System), and the like. Further, the camera 40 is attached to the machine body 51 via the gimbal connector 56. The gimbal connector 56 allows the orientation of the camera 40 to be changed.

FIG. 12 is a perspective view showing the controller 60 of the drone 50. The controller 60 of the drone 50 includes a control stick 61, an antenna 62, a mobile device holder 63, and a mobile device 64 mounted on the mobile device holder 63. By operating the control stick 61, the orientation and movement of the aircraft can be controlled. In addition, the camera 40 can be directed in a desired direction. The antenna 62 transmits and receives an airframe control signal and a moving image signal. A predetermined application is installed on the mobile device 64, and a moving image transmitted from the camera 40 can be displayed on the display in real time. The controller 60 has a video recording function and a still image shooting function.

FIG. 13 is a diagram showing an inspection device 200 including a drone 50. It should be noted that this figure is enlarged as appropriate for the convenience of structural explanation, and is not necessarily a figure proportional to the actual dimensions. In the figure, one end of the support 70 is attached to the camera 40. A Fresnel lens 41 is attached to the other end of the support 70. The shape of the support depends on the difference in size between the camera 40 and the Fresnel lens 41, and is, for example, conical, pyramidal, cylindrical, or tubular.

FIG. 14 is two examples of a front view of the Fresnel lens 41 viewed from the tip end side of the support 70. (A) is a case where the support 70 has a pyramidal shape or a square cylinder shape, and (b) is a case where the support 70 has a conical shape or a cylindrical shape.

Returning to FIG. 13, the support 70 aligns the optical axes (central axes) of the Fresnel lens 41 and the camera 40, and secures a predetermined distance in the optical axis direction. The support 70 is preferably a lightweight and opaque material (eg, resin, carbon fiber). The light weight does not prevent the drone 50 from maintaining a horizontal position. Due to the opacity, only the light from the Fresnel lens 41 can be taken into the camera 40.

By operating the controller 60, the inspection device 200 approaches the surface of the module 1M and adjusts the orientation of the camera 40 so that the Fresnel lens 12f of the module 1M and the Fresnel lens 41 align with each other in the optical axis Ax. .. If the optical axes match, the light receiving unit R appears on the mobile device 64. In this way, the light receiving portion R can be photographed. By moving the drone 50 in parallel with the module 1M, it is possible to take a picture of all the light receiving portions R. Further, the moving image taken while continuously moving the drone 50 can be played back slowly or stopped, and the image of the light receiving unit R can be confirmed. The Fresnel lenses 12f and 41 in FIG. 13 are drawn with exaggerated shape features, and are actually thinner (about 2 mm).

<< Example of image >>
FIG. 15 is an example of an image of the light receiving unit R in a normal state. The image shows the shape of the outer protective plate 32 and the state of the ball lens 30 inside the protective plate 32. The surface of the cell 33 can be seen through the clear ball lens 30. In this case, the light receiving unit R is normal.

FIG. 16 is an example of an image of the light receiving unit R in an abnormal state. The image shows the shape of the outer protective plate 32 and the state of the ball lens 30 inside the protective plate 32. The ball lens 30 is cloudy and looks whitish. In this case, the light receiving unit R is abnormal.

<< Other Embodiments >>
FIG. 17 is a diagram showing another embodiment of the inspection device 200. The difference from FIG. 13 is that the camera 40, the support 70, and the Fresnel lens 41 are provided in two sets. In this case, the drone 50 is easier to balance the weight than the example of FIG. In addition, the camera position for pointing the camera 40 toward the module 1M can be taken more quickly. Although FIG. 17 shows an example in which two sets of the camera 40, the support 70, and the Fresnel lens 41 are provided, three or more sets may be provided at equal intervals in the circumferential direction around the drone 50.

FIG. 18 is a diagram showing an example in which the support of the Fresnel lens 41 is used as an arm. One end of the arm 71 is fixed to the camera 40, and the other end supports the Fresnel lens 41. The material of the arm 71 is preferably lightweight and durable resin or carbon fiber. For example, if a plurality of arm pieces are connected to each other so that the bending angle of the arm 71 can be adjusted, fine adjustment of the optical axis of the camera 40 and the optical axis of the Fresnel lens 41 can be easily performed.

In each of the above embodiments, a Fresnel lens is used as the condenser lens on the camera 40 side, but a convex glass lens can also be used.
Further, in each of the above embodiments, the drone 50 is used to support the camera 40 and the Fresnel lens 41, but instead, the camera 40 and the Fresnel lens 41 can be supported by a support device that moves on the ground. ..

<< Summary of Disclosure >>
As described above, the present disclosure relates to a condensing solar power generation module 1M which is an aggregate of optical units 1U that condense sunlight by a first condensing lens (Frenel lens 12f) and guide it to a light receiving unit R. The inspection device 200, which is on the extension line of the optical axis of the optical unit 1U, faces the first condenser lens (Frennel lens 12f), and has a focal position opposite to that of the first condenser lens. A two-condensing lens (Frenel lens 41) and a camera 40 that captures a real image (RR) formed by condensing parallel light arriving from the light receiving unit R through the first condensing lens by the second condensing lens. I have.

In the inspection device 200 configured in this way, since the light receiving unit R can be photographed as a real image, the light receiving unit can be photographed more clearly. Therefore, the concentrating photovoltaic power generation module 1M can be inspected efficiently and easily.

《Supplementary note》
It should be noted that at least a part of each of the above-described embodiments may be arbitrarily combined with each other.
It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 array 1M concentrating photovoltaic power generation module (module)
1U Optical unit 2 Tracking mount 11 Housing 11a Bottom surface 12 Condensing unit 12a Glass plate 12f Fresnel lens (condensing lens)
13 Flexible printed wiring board 14 Shielding board 14a Opening 21 Strut 22 Foundation 23 2-axis drive unit 24 Horizontal axis 25 Mount part 25a Reinforcing material 25b Rail 30 Ball lens 31 Cell package 31e Upper end inner peripheral edge 32 Protective plate 33 Cell 34 Sealing part 40 Camera 41 Fresnel lens (condensing lens)
50 Drone 51 Main body 52 Frame arm 53 Motor 54 Propeller 55 Landing leg 56 Gimbal connector 60 Controller 61 Control stick 62 Antenna 63 Mobile device holder 64 Mobile device 70 Support 71 Arm 100 Concentrating solar power generation device 200 Inspection device Ax Optical axis C1, C2 Circle F1, F2 Focus L1, L2, L4 Focal length L3 Distance NL Normal R Light receiving part IR Virtual image RR Real image θ Elevation angle

Claims (7)

An inspection device for a condensing photovoltaic power generation module, which is an aggregate of optical units that condense sunlight with a first condensing lens and guide it to a light receiving unit.
A second condenser lens that is on an extension of the optical axis of the optical unit and faces the first condenser lens and has a focal position opposite to that of the first condenser lens.
A camera that captures a real image formed by condensing parallel light that arrives from the light receiving unit via the first condensing lens by the second condensing lens.
Concentrated photovoltaic module inspection device equipped with. The inspection device for a concentrating solar power generation module according to claim 1, comprising the second condensing lens and an unmanned flying object that supports the camera at a predetermined position in the air. The inspection device for a concentrating solar power generation module according to claim 1 or 2, further comprising a tubular support having one end attached to the camera and the other end supporting the second condensing lens. .. The inspection device for a concentrating solar power generation module according to claim 1 or 2, further comprising an arm-shaped support having one end attached to the camera and the other end supporting the second condensing lens. .. The first condensing lens and the second condensing lens are both Fresnel lenses, and any one of claims 1 to 4 in which the surfaces opposite to the Fresnel lens-processed surfaces face each other. The inspection device for the condensing type solar power generation module described in the section. One of claims 2 to 5, wherein a plurality of sets of the camera, the support, and the second condenser lens are arranged at equal intervals in the horizontal circumferential direction around the unmanned flying object. The inspection device for the concentrating solar power generation module described in the section. This is an inspection method for a condensing photovoltaic power generation module, which is an aggregate of optical units that condense sunlight with a first condensing lens and guide it to a light receiving unit.
A second condenser lens whose focal position is opposite to that of the first condenser lens is positioned on an extension of the optical axis of the optical unit and faces the first condenser lens.
The parallel light arriving from the light receiving unit via the first condenser lens is condensed by the second condenser lens and photographed by a camera as a real image.
Inspection method for concentrating photovoltaic modules.

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