JPS60179811A - Power generating set using solar light - Google Patents

Abstract

PURPOSE:To improve efficiency moreover by fitting a posture control means to a floating body having solar cells and turning the photodetecting surface of the solar cells always to the sun. CONSTITUTION:When solar light L is irradiated rectangularly to the photodetecting surface of the solar cells 2, the quantity of light made incident on respective sensors 13a-13c is approximately the same. When the sun rises moreover, the solar light L is irradiated obliquely to the photodetecting surface of the solar cells 2 and the quantity of light made incident on respective sensors 13a-13c are made different each other. The difference is detected by a comparator 15 as a voltage difference to detect the solar position. A control device controls the posture of the floating body 1 by actuating three underwater winches 8a-8c, loosing one wire 9a and winding up other wires 9b, 9c simultaneously so that the solar light L is irradiated rectangularly to the photodetecting surface of the solar cells 2. Consequently, the posture of the floating body 1 is continuously controlled in accordance with the movement of the sun and the photodetecting surface of the solar cells is always turned to the sun.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar power generation device suitable for use on the ocean or on isolated remote islands without power supply facilities.

BACKGROUND OF THE INVENTION Electric power may be required for various purposes such as ocean exploration and marine weather observation on the ocean, on isolated remote islands and coastal areas without power supply facilities. In such a case, it is conceivable to float a solar cell on the ocean and obtain luminous power. However, simply attaching a solar cell to a buoy and floating it on the ocean would not be able to receive a sufficient amount of light because the position of the sun changes every moment, resulting in inefficiency. There is a problem.

The present invention has been made in view of the above-mentioned circumstances, and includes attaching an attitude control means to a floating body equipped with a solar cell, and configuring the attitude control means so that the light-receiving surface of the thesora cell is always oriented toward the sun. The purpose is to provide a solar power generation device with even higher efficiency. Hereinafter, the present invention will be explained in detail based on the drawings.

7 to 3 show an embodiment of the solar power generation device of the present invention, in which numeral 1 represents a floating body floating on the sea surface W. FIG. This floating body 1 is made of metal material, glass fiber, etc. and has a substantially semi-spherical shape, and has a watertight structure with sufficient buoyancy.The circular plane part is protected from sunlight. A plurality of solar cells 2 that receive electric current and generate current are provided over almost the entire area. A pair of outputs @3 are connected to the electrodes of a predetermined solar cell 2 among these plurality of solar cells 2, and this output line 3 is branched in the middle,
They are respectively connected to a pantry 4 provided inside the floating body 1 and an attitude control means 5 to be described later. The electric power obtained by the solar cell 2 is used as it is, or is stored in the battery 4 and then used, and a part of it is used for operating the attitude control means 5. configured to be used. Furthermore, the output @3 of the solar cell 2 is branched in the middle, and its cathode is connected to a metal part 6 such as the floating body 1, and its anode is connected to an anode rod 7 that is submerged in the sea. The metal portion 6 is always subjected to cathodic protection.

On the other hand, the floating body 1 is attached with attitude control means 5 that detects the position of the sun, controls the attitude of the floating body 1 based on the detection signal, and directs the light-receiving surface of the solar cell 2 toward the sun. That is, each of the three sets of underwater winches 8a, 8b, and 8c has a spherical outer surface of the floating body l.
'9jL, 9b, 9c are connected at equal intervals, and these underwater winches 8+L,
8b and 8c are attached to each apex portion of a substantially triangular anchor 10 that is sunk into the sea. Also, inside the floating body 1, a detection device 1 for detecting the position of the sun is installed.
1, and the above 3 based on the signal obtained by this detection device 11.
A control device 12 is provided that controls the underwater winches 8a, 8b, 8c in coordination with each other and optimally adjusts the attitude of the floating body 1. Then, according to the position of the sun detected by the detection device 11, the control device 1-2 operates some or all of the three sets of underwater winches 8a + 8b + 8c to connect the respective wires 9a, 9b, 9e is wound up and unwound, thereby controlling the attitude of the floating body 1. The light receiving surface of the solar cell 2 is always directed toward the sun.

Here, as the detection device 11, for example, as shown in FIG.
3b and 13c are separated by a partition plate 14 and arranged on the same surface as the solar cell 2, and these three sets of sensors 13a
*It is possible to use a device configured to compare each voltage generated by 13 b and 13 c with each other by a comparator 15 to detect the direction of incidence of sunlight, that is, the position of the sun. In FIG. 5, the reference numeral 16 is a circuit that prevents the detection signal of the detection device 11 from fluctuating due to disturbances such as waves, and can be configured with an RC circuit or a timer.

In FIG. 7, the reference numeral 17 indicates equipment such as working machines and measuring instruments that use the power obtained from the solar cell 2.

Next, the operation of the solar power generation device of the present invention configured as described above will be explained.

When using the solar power generation device of the present invention, the entire device is floated on the sea surface W, as shown in FIG.

Then, during sunshine, sunlight irradiates the solar cell 2. The solar cell 2 receives this sunlight on its light-receiving surface, converts the energy into electrical energy, and generates a current. This current is either directly taken out from the output line 3 and used for various purposes, or it is temporarily stored in the battery 4 and used.

Furthermore, although the sun rises in the east and sets in the west, in the solar power generation device of the present invention, the attitude of the floating body 1 is controlled by the attitude control means 5 in accordance with the position of the sun, and the light-receiving surface of the solar cell 2 is is always directed toward the sun.

That is, as shown in FIG. 6(a), it is assumed that the device is floating on the sea surface WVc with the underwater winch 8a facing east, and the solar cell 2 has the sun rising in the east. It is assumed that the light is irradiating the light-receiving surface of the solar cell 2 at right angles. At this time, the amount of light incident on each sensor 13a, 13b, 13c of the detection device 11 is approximately the same. When the sun rises further from this state, the sunlight will irradiate the light-receiving surface of the solar cell 2 obliquely, and also obliquely irradiate each sensor 13a, 13b, 13c of the detection device 11. However, each sensor 13&, 13b.

Since the partition plate 14 is provided between the sensors 13c, the amount of light incident on each sensor 13a, 13b, and 13c varies. This is detected as a voltage difference by the comparator 15, the direction of sunlight irradiation is sensed, and the position of the sun is detected. Then, when this comparison signal enters the control device 12,
The control device 2 includes three sets of underwater winches 8a, 8b, 8c.
is activated to loosen one wire 9a and at the same time wind up the other wires 9b and 9c, thereby controlling the attitude of the floating body 1 so that sunlight irradiates at right angles to the light receiving surface of the solar cell 2. Make it. In this way, the attitude of the floating body 1 is continuously controlled according to the movement of the sun, and the solar cell 2
The light-receiving surface always faces the sun. Figure 6('b) shows the attitude of floating body 1 when the sun is located almost directly above floating body 1.
In addition, Figure 6 (C) shows floating body 1 when the sun moves to the west.
The postures are shown respectively.

In this way, in the solar power generation device described above, since the light-receiving surface of the solar cell 2 faces the normal-pressure sun, sunlight can be received to the maximum extent, and therefore, the device efficiency is extremely high.

Furthermore, the solar cell 2
A portion of the current generated by the force can be used to provide constant electrolytic protection, and the occurrence of rust on the metal parts 6 can be prevented, resulting in high durability of the device. Further, the current generated by the solar cell 2 can be directly extracted and used, or can be temporarily stored in the battery 4 and used.

Alternatively, after the control device 12 and the like are appropriately protected, a material with a light specific gravity may be filled inside the control device 12 and the like. Further, the method for attaching the solar cell 2 to the floating body 1 is arbitrary; after the solar cell 2 is attached, it may be covered and protected with transparent plastic or the like. Furthermore, the detection device 1
Although configuration 1-1 uses 1Fi and J sets of sensors, 13a, 13b, and 13c, accuracy may be increased by using 7-sensors of μ or more sets, or other types of detection devices may be used. You can. It is also possible to control the attitude of the floating body 1 without using the detection device 11, following a previously memorized orbit of the sun.

Furthermore, in the above, the attitude of the floating body 1 may be adjusted by using the three sets of underwater winches 8a, 8b, and 8c in operating inches to improve control efficiency. Further, for example, a rail is formed on the inner surface of the floating body 1, and a weight is made to roll along this rail, and the position of the weight is controlled by the control device 1.
2 may be used to adjust the attitude of the floating body 1.

In addition, as described above, instead of controlling the attitude of the floating body 1 to direct the light-receiving surface of the solar cell 2 toward the sun, the attitude of the solar cell 2 itself may be directly controlled.

As explained above, in the solar power generation device of the present invention, since the floating body is provided with an attitude control means, the light receiving surface of the solar cell can always be directed toward the sun, and sunlight can be maximized. can be taken into account. Therefore, the efficiency of the device is extremely high.

Furthermore, since it uses solar cells, it is a hot topic that it has the advantage of not requiring refueling or regular maintenance, and has a semi-permanent lifespan.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
7 is a front view, FIG. 1 is a view taken along the arrow n--■ in FIG. 7, FIG. 3 is a schematic circuit diagram, FIG. 3 is a block diagram, and FIG. 3 is a schematic circuit diagram of the detection device. Also, Figure 6 (a) to c)
FIG. 3 is a side view showing the state of attitude control of the floating body. 1...Floating body, 2...Solar cell, 5.
... Attitude control means. Figure 1 Figure 2 8c 8b Figure 3

Claims (1)

[Claims] A solar cell is provided on a floating body floating on the water surface, and the floating body is provided with attitude control means for controlling the attitude of the floating body or the solar cell to direct the light-receiving surface of the solar cell toward the sun. Tai 19 photovoltaic device.