JPS6073250A - Solar position tracking device - Google Patents

Abstract

PURPOSE:To utilize the contracting force of a shape memory alloy wire most effectively by a method wherein the same wire, arranged so as to be located at the focus of light collecting section, is utilized as a swing motion transmitting mechanism to permit to track the sun without employing electric power and sliders as well as differential wires, connecting these sliders, are equipped in the device. CONSTITUTION:When a sensor collector 10x, opposing to solar light, collects the light to the focus thereof, the shape memory alloy wire 11x is heated and contracted into the shape of coil thereby pulling a tension wire 12x, connected to one end of the wire 11x, into X-direction. As a result, a rotating frame 6, connected through a pair of worm gears 16, is rotated into Y-direction and changes the position of a main collector 8 so as to oppose to the sun. When the sun moves and the shape memory alloy wire 11b begins to be contracted, the tension wire 12b, connected to the wire 11b, moves the slider 17b into B-direction. All of the sliders 17 are connected by wires 21 whose both ends are fixed, therefore, the slider 17a is pulled back into A-direction and the shape memory alloy wire 11a is extended to a condition before being heated.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a solar position tracking device a that tracks a photoreceptor to the sun.
Regarding.

[Prior art and its problems]

In order to collect solar energy more efficiently with photoreceptors that use solar energy, such as solar panels or solar heat collectors consisting of a reflector and a heat collection tube, it is necessary for the photoreceptor surface to follow the movement of the sun. It is desirable to always face sunlight, and in order to achieve this, conventional systems have been used that include a timer, a computer that stores the sun's position, or a sun sensor! 11 system and an electric motor to drive the photoreceptor and make its photoreceptor surface track the sun.

This conventional method requires unused power for the motor and control system, so when generating power using solar energy, a portion of the generated power must be supplied as in-house power for the tracking device. First, there was a drawback that the amount of +11□1 sent to the outside was reduced. Furthermore, in cases where hot water from a solar heat collector is used, it is also necessary to supply power from outside for the device.

[Purpose of the invention]

An object of the present invention is to provide a solar position tracking device that can automatically track the sun without using gravity in the above-mentioned areas.

[Summary of the invention]

The present invention relates to a solar cell panel, a solar panel, a solar heat collector, etc., which is made up of a reflector, a heat collector tube, etc., in which a photoreceptor is swingably installed to face sunlight. A plurality of light condensing parts fixedly arranged with respect to the ground at an angle n along the line, a shape memory alloy wire arranged so as to face the focal point of the light condensing parts, and a shape-memory alloy wire that receives the contraction of the wire. a transmission mechanism consisting of a tension wire and a gear for transmitting the swinging motion of the slider, a slider is connected to the tension wire, and all the sliders are connected to each other by a differential wire. This is a solar position tracking device.

〔Effect of the invention〕

According to the present invention, the sun can be tracked without using electric power, and since the slider and the differential wire connecting these are provided, the contractile force of the shape memory alloy wire can be used most efficiently.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 5 show an embodiment of the present invention. Here, as an example, the photoreceptor (d) is a solar heat collector consisting of a reflector and a heat collecting tube, and the direction of solar tracking is a north-south axis type east-west tracking. bending height] ia 11.

In Figure 1, the back bracket (3) of the pace (1) Kii frame (2) is supported by the spindle (4), and the frame (2) has a Hayabusa M "iri" (5).
is supported.

The boss (7) of the rotating frame (6) is connected to this heat collecting pipe by word of mouth.
/-mu (61J: Supported in a swingable manner around the heat collecting pipe (5), especially the force.

The i'+iI rotary frame 1/- has a parabolic warp j♀;

A main collector (8) consisting of
The curvature of this main collector (8) is
) is arranged so that the sunlight reflected by the heat source (5) will be concentrated on the heat source (5). In this embodiment, this main collector (8) and the heat collecting? t& (5) constitutes a photoreceptor.

At the end of the frame (2) there are 44 of the forward bent heat collecting tubes (5).
A fixed frame (9) is provided protruding in a plane perpendicular to the 11 beam, and a sensor collector (10) consisting of a parabolic reflecting mirror serving as a light condensing part is mounted on this fixed frame. As shown in the figure, there is a lot of interaction with the movement of the sun.
/′1 placed at different angles6. has been done.

A shape memory alloy wire (11) faces the hot spot of each sensor collector (10), and this shape memory 'B1
One end of the alloy wire (11) is fixed to the fixed frame (9). This shape memory alloy wire contracts into a coil shape when heated, and the other end is tied to the d-tension wire (12). The tension wires (12) are each wound around a boot IJ (15) fixed to a drive shaft (14) via an intermediate pulley (13).

On the other hand, the lower boss (7a) of the rotating frame (6) and 1
The drive shaft (14) No. 11 is rotationally coupled by a pair of worm gears (16).

Each of the tension wires (12) has a slider (
17) is connected. This slider (17) is the third
As shown in Figures 1 to 5, it consists of a slide base (18) and a movable pulley (19), and the tension wire (12) is moved by two guides (20) each. 1
It moves orthogonally with 1J. The transfer pulley (19) of each slider (17) has an IC7 old fI as shown in Figure 3.
The cross-section 7 (21) is wound around the guide roller (22), and both ends thereof are fixed.

Next, the effects of the four actual IEI examples described above will be explained.

Now thick l (if i is in the direction j (1) as shown in Figure 2, ha,
In addition, only one solid sensor (Cl0X) facing the sunlight from the multiple sensors (10) is illuminated at one point, and the shape memory alloy wire (IJ, x
)e/Kawayo-8. Then this shape memory alloy wire (
llx) is contracted into a coil and tied at one end. Pull the tension wire (12x) with the force indicated by arrow X in Figure 1. As a result, the wheel 9 (15) I-1 fixed to the drive shaft (14) rotates due to the unwinding action of the tension wire (12x) wound around it, and thereby the pair of worm gears ( The rotating frame (6) rotatably coupled at 16) rotates in the direction of arrow Y in FIG. 2, changing its position so that the main collector (8) faces the sun.

Next, let's examine the effect when the sun moves using Figure 3. The shape memory alloy wire (lla), which was heated and contracted by the sun's heat at a certain time, maintains its exact shape even when the sun no longer receives heat as it moves 1-. Furthermore, the sun moves and other shape memory alloy wires (111
)) is heated and begins to contract, the tension wire (121)) connected thereto moves the slider (17b) in the direction of arrow B. All sliders (17)
are connected to each other by a differential wire (21) with both ends fixed, so when the slider (17b) moves, the slider (17a) is pulled back in the direction of the arrow, and as a result, the shape memory alloy wire (lla ) undergoes initial heating, so A
This will be extended to state i1.

According to the solar position tracking device according to the present invention described in detail above, it is possible to make the receiver body track the sun without using force. There are two methods for returning the shape: a bias method that uses a spring or weight, and a placement method that uses part of the shrinkage force of the shape memory alloy wire.The differential force method uses the shrinkage force of the shape memory alloy wire most efficiently. According to the present invention, this differential power type can be realized by a slider (17) and a differential wire (21), which is known to be widely used.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the solar position i tracking device according to the present invention, FIG. 2 is a view taken along the line 1-1 in FIG.
FIG. 3 is a partially enlarged explanatory diagram of FIG. 1. Figure 4 is a view taken along the l-1 line in Figure 3, and Figure 5 is a view taken along the line l-1 in Figure 3.
The figure is drawn in the direction of the arrow shown by the ``G'' line in the figure. 10. Sensor force 1/cuta, 11... Shape memory alloy wire, 12... Tension wire 515... Pulley, 1
6...worm gear, 17...slider, 21-difference"+')) wire. Patent attorney: Kuzusuke Norichika (and 1 other person) Fig. 2 Fig. 8

Claims (1)

[Claims] In a device having a photoreceptor positioned so as to be swingable so as to face sunlight, a portion fixed to the ground at different angles as if moving with the movement of the sun; a plurality of light condensing parts,
It has a shape memory alloy wire arranged so as to face the focal point of the light condensing section, and a transmission mechanism consisting of a tension wire and a gear for transmitting the contraction of the wire to the swinging motion of the photoreceptor. Further, a slider is attached to the tension wire, and all the sliders are mutually lagged by a spacing wire.
Tai 1 Senmi rank 1 which makes all li 11 changes
<'j it"j, I-chin device.