JPS60206160A - Solar-cell panel device - Google Patents

Abstract

PURPOSE:To control the directivity against the sun positively by providing a detecting means for sun-direction error signals of the peripheries of each shaft of a plurality of solar-cell panels and a detecting means for the mean values of the azimuth and elevation angles of solar rays. CONSTITUTION:When the angles of incidence of solar rays to first and second solar-cell panels 21, 22 change, solar sensors 25-28 detect the changes and output detecting values to a differential signal detecting circuit. Sun-direction error signals with respect to each Yp and Xp axis 30, 31 of the solar-cell panels 21, 22 are detected while sun-direction error signals with respect to a mean Yp axis 30 are detected by a summed signal detecting circuit, and sun-direction error signals with respect to a mean Xp axis 31 are detected by an arithmetic circuit and outputted to a direction control driving section. The solar-cell panels 21, 22 are rotated and driven, and the directivity against the sun is controlled. Sun-direction error signals can be detected even under the state in which the directions of normals of the solar-cell panels 21, 22 do not coinide with each other, and the directivity against the sun can be controlled positively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to, for example, a solar cell and solar panel device mounted on an artificial satellite.

[Technical background of the invention]

Generally, this type of solar panel device is equipped with a solar sensor to detect attitude errors with respect to sunlight and control the direction of the solar cells and panels toward the sun, as shown in Figure 1. For example, a pair of first and second solar cell panels 2.3 are rotatably provided at both ends of the satellite 10 via rotational shafts 4.5. One of the first and second solar panels 2 and 3 is equipped with first and second solar sensors 6.7 for attitude error detection, and the other solar panel 2 is equipped with first and second solar sensors 6.7 for attitude error detection. The second solar panel 3 is equipped with third and fourth solar sensors 8 for attitude error detection.
, 9 are installed. These first to fourth solar sensors 6 to
As shown in FIG. 2, reference numeral 9 is 2 in the normal direction substantially perpendicular to the surfaces of the first and second solar cell iR channels 2 and 3, and an angle α (only one point is shown in the figure) with respect to the axis 10. The first and fourth solar sensors 6.
9 is approximately parallel to the rotation axes 4 and 5, and the YP axis 11 and the zP
iI (110), and the other second and third solar sensors 7.8 are attached to the zpM'c1
0, the XP axis 12 which is substantially orthogonal to the YP axis 11, and the zP axis 10.

Directional control of the first and second solar panels 2 and 3 is performed by processing the detection signals from the first to fourth solar sensors 6 to 9 as shown in FIG. 3. That is, the first and second solar panels 2 and 3 are aligned with the XP axis 12
The first and fourth sun sensors 6 input an error signal Qx with respect to the direction of the surrounding sun to the first difference signal detection circuit 13.
．． 9, and the error signal QY with respect to the sun direction around the Yp axis 11 is determined by each output signal of the second and third sun sensors 7.8 input to the second difference signal detection circuit 14. By doing so, directivity control in the direction of the sun is performed.

[Problems with background technology]

However, in the above solar panel device, the first and second solar panels 2 and 3 rotate approximately in the same manner about the rotation axis 4.5,
In the driven state (that is, in the state where the normal directions match), reliable pointing control is performed, but when the normal directions do not match, such as when the first and second solar cell tunnels 2.3 are rotationally driven separately. There is a problem if the situation occurs. That is,
Error signals Qx and QY for each solar direction around the xP axis 12 and the YP axis 11 are generated by the first and second solar sensors 6.7 of the first solar cell A panel 2 and the second solar cell panel 3.
This is because if the normal directions of the mutual panel surfaces do not match, a detection error will occur and proper pointing control will not be possible.

[Purpose of the invention]

This invention was made in view of the above circumstances, and in particular, even when a plurality of solar cells/gunnels have mismatched normal directions, the error signal with respect to the solar direction can be reliably detected.
It is an object of the present invention to provide a solar panel device that can reliably perform solar direction control.

[Summary of the invention]

That is, the present invention provides a solar cell panel device having a plurality of solar cell panels whose orientation is controlled in the direction of the sun. The present invention is characterized in that it is equipped with a detecting section comprising a first detecting means for detecting the azimuth and a second detecting means for detecting the average value of the azimuth and elevation angle of sunlight with respect to the plurality of solar panels.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 4 shows a solar cell nozzle device according to an embodiment of the present invention, in which a pair of first and second solar cells 7'e 21 and 22 are located at both ends of a satellite 200, respectively, with rotational axes. It is rotatably provided via 23 and 24. These first
First and second solar sensors 25 and 26 for attitude error detection are respectively mounted on both ends of the first solar panel 2 of the second solar 'IiT and pond panels 21 and 22, At both ends of the other second solar panel 220, there are third and fourth solar sensors 27, 2 for attitude error detection.
& are installed respectively.

As shown in FIG. 5, these first to fourth solar sensors 25 to 28 are arranged at an angle β (in the figure, (only one location is shown) and the rotation axis 23.
24 and YPP2O3 and 2. Axis 29 and YPP2O
3 are each attached at a position of approximately 45° with respect to the XP axis 31 which is substantially perpendicular to the XP axis 31.

FIG. 6 shows the configuration of the signal processing circuit of the first to fourth solar sensors 25 to 28, and the output terminal of the solar sensor 25 of the fungus 1 is connected to the YPP2O3 and X of the first solar panel 21.
First and third difference signal detection circuits 32 that output solar direction error signals QY1 and Qxl, respectively, that are too sensitive to the P axis 31.
33 in common. The output ends of the second and third sun sensors 26 and 27 are connected to the other input ends of the first and third difference signal detection circuits 32 and 33, respectively. Still these 2nd and 3rd
The respective output ends of the solar sensors 26, 27 are connected to the X, axis 31 and Y, axis 30-! of the second solar panel 22. The fourth and second difference signal detection circuits 34 and 35 are connected to one input terminal of each of the fourth and second difference signal detection circuits 34 and 35 that output the solar direction '° error signals Qx2 and QY2, respectively.
d, fourth solar sensor 28 at each other input end of 4.35
The output ends of the two are connected in common. Among these, the first and second difference signal detection circuits, ? Each output terminal of the first sum signal detection circuit 36 outputs a solar direction error signal QY3 around the average YP axis 3 degrees of the first and second solar panels 21.22 to each output terminal of 2 and 35. connected to.

On the other hand, each output terminal of the third and fourth difference signal detection circuits 33 and 34 is connected to each input terminal of a second sum signal detection circuit 37 that outputs a sum signal QX3 of the solar direction error signal QX+ and QX2. be done. This second sum signal detection circuit 3
7, the third and fourth difference signal detection circuits 33.
The output end of 34 is connected to the first and second solar panel 21.
゜220 average solar direction error signal Qx around the XP axis 31
It is connected to the input terminal of the arithmetic circuit 38 which outputs 4.

Now, the solar cell panel device configured as described above operates as described below. That is, in the solar panel device, when the angle of incidence of sunlight on the first and second solar panels 21 and 22 changes, the first to fourth solar sensors 25 to 28 detect it and - Output to fourth difference signal detection circuits 32.35, 33.34. Then, these first to fourth difference signal detection circuits 32°35.33.3
4, the solar direction error signals Q, Q, Q, Q are detected, and the first sum signal detection circuit 36 detects the average Y, solar direction error signal QY3 around the axis 30, and calculates The circuit 38 averages XPQa, ? A solar direction error signal QX4 of 1-5 is detected and output to a pointing control drive section (not shown). Therefore, the first and second solar panels 21 and 22 receive the solar direction error signal QY1'.
QY2' QY31QX1 +Q, and is rotationally driven via x2 x4 through the above-mentioned pointing control drive unit responsive to Q, and solar pointing control is performed.

〔Effect of the invention〕

As detailed above, according to the present invention, the minimum number of first to
The first solar sensor using the fourth solar sensor 32, 35133J34
and each YP and XP of the second solar panel 21.22
Axis 30. :31 thick IX bow direction error signal Q,Q
and Q, QYj Y2 XI
The state in which the normal directions of the first and second solar panels 21 and 22 are rotationally driven in a substantially concave manner is thermal theory, and even in a state in which the normal directions do not match, a solar direction error signal can be detected. , it is possible to perform reliable solar pointing control.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made within the scope of 91i without departing from the gist of the present invention.

[Brief explanation of drawings]

Figures 1, 2, and 3 are block diagrams showing a conventional solar cell/armpit device, a circuit diagram, and a circuit diagram, respectively, and Figure 4 is a solar cell according to an embodiment of the present invention. A configuration diagram showing the panel device, FIG. 5 is a detailed configuration diagram showing the main parts of FIG. 4, and FIG. 6 is a circuit 1 showing the signal processing circuit of FIG. 4;
It is a 1・ν composition diagram. 20... Satellite, 21... First solar cell node,
22... Second solar cell panel, 23.24... Rotating shaft, 25-28... First to fourth solar sensors, 29
-ZP axis, 30 -Yp axis, 31 ・XPI axis, 32...
・First difference signal detection circuit, 33... Third difference signal detection circuit, 34... Fourth difference signal detection circuit, 35... Second difference signal detection circuit, 36... Third difference signal detection circuit 1 sum signal detection circuit, 37... second sum signal detection circuit, 38... arithmetic circuit. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] In a solar cell panel device having a plurality of solar cell panels whose orientation is controlled in the direction of the sun, a solar cell panel device that detects a solar direction pointing error signal around one axis of rotation of each of the plurality of solar cells/9 channels; 1. A solar cell characterized in that it is equipped with a detection unit comprising a first detection device and a second detection device that detects an average value of the azimuth and elevation angle of sunlight with respect to the plurality of solar cell channels. Battery/e-nel device.