KR102471089B1 - Device for adjusting heliostat - Google Patents

Abstract

According to an embodiment of the present invention, a heliostat angle adjusting device having two degrees of freedom includes a first pulley disposed so that a first wire is wound in parallel with a first axis, and a first wire Second and third pulleys disposed so as to be wound in parallel with the second axis, both ends of the first wire are differentially driven to rotate the reflector with respect to the second axis, and both ends of the first wire are simultaneously driven to form the reflector. It includes a driving unit that rotates on the basis of one axis. At this time, the first pulley is coupled to the support formed on the rear surface of the reflector, the reflector is rotated by rotation or movement of the first pulley, the first wire is connected to the upper end or lower end of the second pulley, the lower end or upper end of the first pulley, It is disposed to pass through the upper end or lower end of the third pulley.

Description

Heliostat angle adjusting device {DEVICE FOR ADJUSTING HELIOSTAT}

It relates to a heliostat device, and more particularly, to a device for adjusting the angle of a reflector of a heliostat device.

The reflector of the heliostat is fixed to a support structure such as a cradle or support and is controlled to move intermittently or continuously in a specific direction as needed. In other words, since the sun's azimuth and altitude angles change continuously throughout the year and throughout the day according to the earth's rotation and rotation, the reflector of the heliostat moves while tracking the sun's position according to the sun's azimuth and altitude angles so that the reflected light maintains a specific direction. controlled

In general, devices for tracking the position of the sun rotate a reflector or the like in two axes according to the altitude and azimuth angles of the sun, and a motor and a gear are used for this rotation. At this time, expensive motors and gears are used for precise control of motors and gears, and in particular, expensive and precise gears are used to reduce backlash in the case of gears.

Patent Literature 1 connects and fixes a total of three wires, one line at each of three points constituting a triangle, on the bottom surface of a plate-like member installed to be inclined in an arbitrary direction around a center point, and the length of each of these three lines of wire Disclosed is an invention that significantly simplifies the plate-like member drive section by allowing the plate-like member to be inclinedly driven in any desired direction by independently increasing or decreasing . However, since the wire is directly fixed to the rear surface of the plate-shaped member, stress is concentrated on the corresponding portion, requiring reinforcement, which limits precision driving.

Republic of Korea Patent Publication No. 10-2013-0135735

An object of the present invention is to provide a device capable of controlling the rotation of a reflector in two axes with a simple structure using a wire and a pulley without applying stress to the reflector.

According to an embodiment of the present invention, a heliostat angle adjusting device having two degrees of freedom includes a first pulley, a second pulley, a third pulley, and a driving unit.

The first pulley is arranged to wind the first wire parallel to the first axis, and the second pulley and the third pulley are arranged to wind the first wire parallel to the second axis.

The drive unit differentially drives both ends of the first wire to rotate the reflector about a second axis, and simultaneously drives both ends of the first wire to rotate the reflector about a first axis.

At this time, the first pulley is coupled to the support formed on the rear surface of the reflector, the reflector is rotated by rotation or movement of the first pulley, the first wire is connected to the upper end or lower end of the second pulley, the lower end or upper end of the first pulley, It is disposed to pass through the upper end or lower end of the third pulley.

According to an embodiment of the present invention, the first pulley, the second pulley, and the third pulley of the heliostat angle adjusting device have two tangent lines of the first pulley that coincide with the normal direction of the reflector, respectively, of the reflector of the second pulley and the third pulley. The first pulley, the second pulley, and the third pulley may be disposed so as to overlap one tangential line coincident with the normal direction.

According to another embodiment of the present invention, the heliostat angle adjusting device is disposed between the first pulley and the second pulley and between the first pulley and the third pulley, respectively, and the first auxiliary pulley and the first auxiliary pulley for changing the direction of the first wire. 2 auxiliary pulleys may be further included. At this time, the first auxiliary pulley has two tangent lines corresponding to the normal direction of the reflector of the first auxiliary pulley, respectively, one tangent in the normal direction of the reflector of the first pulley and the normal of the reflector of the second pulley. direction, and the second auxiliary pulley coincides with the normal direction of the reflector of the second auxiliary pulley, and the two tangents coincide with the normal direction of the reflector of the first pulley and the normal of the reflector of the third pulley, respectively. It may be arranged to overlap with one tangent of

According to another embodiment of the present invention, the heliostat angle adjusting device may further include a second wire and a fourth pulley. The second wire is fixed to the rear surface of the reflector to apply a preload to rotation in the first axial direction, and the fourth pulley is rotated by the second wire and may be disposed between the second pulley and the third pulley.

According to various embodiments of the present disclosure, the diameters of the first pulley, the second pulley, and the third pulley of the heliostat angle adjusting device may all be formed to be the same.

According to the present invention, stress is not applied to the reflector due to the wire, and rotation of the reflector can be controlled in two axes with a simple structure using a wire and a pulley.

1 is a perspective view of a heliostat angle adjusting device according to an embodiment of the present invention.
2a and 2b illustrate a concept of a first wire differential drive of a heliostat angle adjusting device according to an embodiment of the present invention.
3 illustrates a concept of simultaneous driving of a first wire of a heliostat angle adjusting device according to an embodiment of the present invention.
4 illustrates a pulley arrangement of a heliostat angle adjusting device according to an embodiment of the present invention.
5 illustrates a pulley arrangement of a heliostat angle adjusting device using an auxiliary pulley according to another embodiment of the present invention.
6 illustrates a pulley arrangement for applying a preload to a pulley arrangement of a heliostat angle adjusting device according to another embodiment of the present invention.

The foregoing and additional aspects are embodied through embodiments described with reference to the accompanying drawings. It is understood that the components of each embodiment are possible in various combinations within an embodiment unless otherwise stated or contradictory to each other. Each block in the block diagram may represent a physical component in one case, but in another case, it may be a logical representation of a function of a portion of a function of one physical component or a function across multiple physical components. Sometimes the substance of a block or part thereof may be a set of program instructions. All or part of these blocks may be implemented by hardware, software, or a combination thereof.

1 is a perspective view of a heliostat angle adjusting device according to an embodiment of the present invention. The heliostat is a device that reflects sunlight to a certain position using a reflector such as a mirror, and calculates the azimuth and elevation angles of the sun and precisely controls the reflector to rotate so that the sunlight is always reflected to a certain position. The reflector 30 shown in FIG. 1 is indicated using a dotted line and is expressed transparently. This is to prevent other components from being covered by the reflector 30, and the actual reflector 30 is not transparent. In the example shown in FIG. 1, the heliostat angle adjusting device has a support extending from the rear surface of the reflector 30 and the first pulley 10 coupled, and the first pulley 10 is driven by the first wire differential driving of the driving unit 20. By the rotation of the reflector 30 can be rotated left and right with respect to the second axis, by the simultaneous driving of the first wire by the first pulley 10 is moved upward can be rotated up and down with respect to the first axis have.

As shown in FIG. 1, according to an embodiment of the present invention, a Heliostat angle adjusting device having two degrees of freedom includes a first pulley 10 and a second pulley 11. , a third pulley 12, and a driving unit 20.

The first pulley 10 is arranged so that the first wire is wound parallel to the first axis. That is, the first pulley 10 is disposed parallel to the first axis, and the first pulley 10 is disposed such that the center of the first pulley 10 is located on the second axis. The first pulley 10 is coupled to a support formed on the rear surface of the reflector 30 and rotates together with the reflector 30 . That is, the rotation or movement of the first pulley 10 rotates the reflector 30 based on the first axis or the second axis. The first poly 10 is preferably arranged to be positioned away from the center of the first axis.

The second pulley 11 is arranged so that the first wire is wound parallel to the second axis. That is, the second pulley 11 is disposed parallel to the second axis, and the third pulley 12 is disposed such that the first wire is wound parallel to the second axis. That is, the third pulley 12 is disposed parallel to the second axis. At this time, the second pulley 11 and the third pulley 12 are disposed symmetrically about the second axis, and do not have to be disposed at the center of the first axis, and the size of the reflector 30 and the second pulley 11 and the second pulley 11 3 Depending on the diameter of the pulley 12, it may be located out of the center of the first shaft or may be located in the center of the first shaft.

At this time, the first wire is disposed to pass through the upper end of the second pulley 11, the lower end of the first pulley 10, and the upper end of the third pulley 12, or the lower end of the second pulley 11, It is disposed to pass the upper end of the first pulley 10 and the lower end of the third pulley 12 . The first wire is disposed such that upper ends and lower ends of the first pulley 10 and the second pulley 11 and the first pulley 10 and the third pulley 12 are crossed.

The driver 20 differentially drives both ends of the first wire to rotate the reflector 30 based on the second axis, and simultaneously drives both ends of the first wire to rotate the reflector 30 based on the first axis. The driving unit 20 may include a bobbin and use a motor for controlling rotation of a gear to wind the first wire around the bobbin. It is not limited thereto, and the first wire may be driven using a linear actuator.

2a and 2b illustrate a concept of a first wire differential drive of a heliostat angle adjusting device according to an embodiment of the present invention. 2A and 2B, an example in which the first wire 40 is arranged to pass through the upper end of the second pulley 11, the lower end of the first pulley 10, and the upper end of the third pulley 12 is shown. .

Figure 2a shows that the reflector 30 shown in (a) rotates the first pulley 10 with respect to the second axis by differential driving in which the driver pulls the end of the first wire 40a in the direction of the second pulley (b) As shown in , the reflector also shows the concept of rotating together. FIG. 2B shows that the reflector 30 shown in (a) rotates the first pulley 10 about the second axis by differential driving in which the driver pulls the end of the first wire 40b in the direction of the third pulley (b). As shown in , the reflector also shows the concept of rotating together.

As shown in FIGS. 2A and 2B , the drive unit rotates the first pulley 10 by a differential drive pulling one end of the first wire 40 to rotate the reflector 30 left and right with respect to the second axis. . Therefore, the heliostat angle adjusting device may adjust the angle of the reflector 30 based on the second axis by driving the first wire 40 differentially.

3 illustrates a concept of simultaneous driving of a first wire of a heliostat angle adjusting device according to an embodiment of the present invention. Both ends of the first wire, that is, the first wire end 40a in the direction of the second pulley and the end of the first wire 40b in the direction of the third pulley are simultaneously pulled to move the first pulley 10 upward (a ) shows the concept of rotating the reflector 30 relative to the first axis so that the reflector 30 in the state shown in (b) becomes the state shown in (b).

As shown in FIG. 3, the driving unit pulls both ends of the first wire 40 at the same time and moves the first pulley 10 up and down by simultaneous driving to rotate the reflector 30 up and down with respect to the first axis. . Therefore, the heliostat angle adjusting device may simultaneously drive the first wire 40 to adjust the angle of the reflector 30 with respect to the first axis.

4 illustrates a pulley arrangement of a heliostat angle adjusting device according to an embodiment of the present invention. In (a) of FIG. 4, an example in which the first wire 40 is arranged to pass through the upper end of the second pulley 11, the lower end of the first pulley 10, and the upper end of the third pulley 12 is shown. have. 4(b) shows a shape in which the first wire 40 is wound around the pulleys 10, 11 and 12. As shown in (a) of FIG. 4, according to an embodiment of the present invention, the first pulley 10, the second pulley 11, and the third pulley 12 of the heliostat angle adjusting device are directed in the normal direction of the reflector. Two tangent lines of the first pulley 10 coincident with may be arranged to overlap one tangent lines coincident with normal directions of the reflectors of the second pulley 11 and the third pulley 12, respectively. That is, among the tangent lines coincident with the normal direction of the reflector of the first pulley 10, one tangent line at a position close to the second pulley 11 is the first pulley among the tangent lines coincident with the normal direction of the reflector of the second pulley 11. Among the tangent lines disposed to overlap with one tangent at a position close to (10) and coincident with the normal direction of the reflector of the first pulley 10, the other tangent at a position close to the third pulley 12 is the third pulley 12 Of the tangents coincident with the normal direction of the reflector, it may be arranged to overlap with one tangent at a position close to the first pulley 10 . The first pulley 10, the second pulley 11, and the third pulley 12 are arranged in different rotational directions, so that the first pulley 10, the second pulley 11, and the third pulley 12 When the tangential lines in the normal direction of the reflector do not overlap, the first wire 40 is driven and the pulleys 10, 11 and 12 can be separated. The heliostat angle adjusting device is operated by arranging the first pulley 10, the second pulley 11, and the third pulley 12 so that the first wire 40 is driven and does not leave the pulleys 10, 11, and 12. 1 The direction of the wire 40 is switched. For example, according to the arrangement of the first pulley 10, the second pulley 11, and the third pulley 12 shown in FIG. 4, the driving unit differentially drives the first wire end 40a in the direction of the second pulley. When is pulled down, the first wire 40 passing through the first pulley 10 rotates the first pulley 10 and the first wire 40 moves in a direction tangential to one side of the first pulley 10 in the direction normal to the reflector. The tangential line of one side of the second pulley 11 in the normal direction of the reflector is disposed to overlap with the tangential line of one side of the first pulley 10 so as to be pulled and wound around the second pulley 11 . Then, the direction of the first wire 40 is changed while passing through the second pulley 11 .

5 illustrates a pulley arrangement of a heliostat angle adjusting device using an auxiliary pulley according to another embodiment of the present invention. According to another embodiment of the present invention, the heliostat angle adjusting device may further include a first auxiliary pulley 15 and a second auxiliary pulley 16 . At this time, the second pulley 11 and the third pulley 12 may be arranged so that their centers are positioned on a first axis passing through the center of the reflector. 5(b) shows a shape in which the first wire 40 is wound around the pulleys 10, 11, 12, 15, and 16. As shown in (a) of FIG. 5, the first auxiliary pulley 15 is disposed between the first pulley 10 and the second pulley 11, and the second auxiliary pulley 16 is the first pulley ( 10) and the third pulley 12 so that the first wire 40 passing through the tangential direction of the first pulley 10 passes through the tangential direction of the first pulley 10 and the third pulley 12 The direction of the first wire 40 may be changed. In the first auxiliary pulley 15, one tangential line of the first pulley 10 in the normal direction of the reflector plate overlaps with one tangential line of the first auxiliary pulley 15 in the normal direction of the reflector plate, and the tangential line of the second pulley 11 in the normal direction of the reflector plate overlaps. One tangential line and the other tangential line in the normal direction of the reflector of the first auxiliary pulley 15 are disposed to overlap, and the first wire 40 unwound from the first pulley 10 is changed in direction by the first auxiliary pulley 15, 2 to be wound on the pulley (11). In addition, in the second auxiliary pulley 16, the other tangential line in the direction of the reflector normal of the first pulley 10 overlaps with one tangential line of the second auxiliary pulley 16 in the direction of the reflector normal, and the normal of the reflector of the third pulley 12 The direction of the first wire 40 unwound from the first pulley 10 is changed by the second auxiliary pulley 16 so that one side tangent of the second auxiliary pulley 16 overlaps the other tangential line of the reflector normal direction. It is wound on the third pulley 12. When the first wire 40 is driven, the first wire 40 that is unwound by rotating the first pulley 10 is not wound directly to the second pulley 11 or the third pulley 12, but the auxiliary pulley 15, 16) can be used to change the direction of the first wire 40 and prevent the first wire 40 from being separated from the pulleys 10, 11, 12, 15, and 16. By using the auxiliary pulleys 15 and 16, the positions where the second pulley 11 and the third pulley 12 are disposed can be set more freely, so that the rotation of the reflector relative to the second axis can be more easily and precisely adjusted. .

6 illustrates a pulley arrangement for applying a preload to a pulley arrangement of a heliostat angle adjusting device according to another embodiment of the present invention. According to another embodiment of the present invention, the heliostat angle adjusting device may further include a second wire 41 and a fourth pulley 13 . The second wire 41 is fixed to the rear surface of the reflector 30 to apply a preload to rotation in the first axial direction, and the fourth pulley 13 is rotated by the second wire 41, and the second It may be disposed between the pulley 11 and the third pulley 12 . When the driving unit simultaneously drives both ends of the first wire to release it, the second wire 41 is pulled due to the preload and the reflector 30 starts to return to its original position. The heliostat angle adjusting device applies a preload to the second wire 41 in relation to the rotation of the reflector 30 so that the reflector 30 can be more easily restored to its original position from rotation caused by the driving of the first wire. . In particular, when both ends of the first wire are simultaneously released when the reflector 30 is rotated about the first axis through simultaneous driving of both ends of the first wire, it can be easily restored to its original position due to preload.

According to various embodiments of the present disclosure, the diameters of the first pulley 10, the second pulley 11, and the third pulley 12 of the heliostat angle adjusting device may all be formed to be the same. If the diameters of the first pulley 10, the second pulley 11, and the third pulley 12 are all the same, the amount by which the reflector 30 rotates from the driving of the first wire 40 can be more easily calculated. It is possible to adjust the angle of the reflector 30 more conveniently.

In the above, the present invention has been described through embodiments with reference to the accompanying drawings, but is not limited thereto, and should be interpreted to cover various modifications that can be obviously derived by those skilled in the art. The claims are intended to cover such variations.

10: first pulley
11: second pulley
12: 3rd pulley
13: 4th pulley
15: first auxiliary pulley
16: second auxiliary pulley
20: driving unit
30: reflector
40: first wire
41: second wire

Claims (5)

In the Heliostat angle adjusting device having two degrees of freedom (Degree of Freedom),
a first pulley around which a first wire is wound parallel to a first axis;
second and third pulleys around which the first wire is wound parallel to the second axis;
A driving unit that rotates the reflector about a second axis by differential driving pulling either end of both ends of the first wire and simultaneously driving the reflector by pulling or releasing both ends of the first wire to rotate the reflector about the first axis;
Including,
The first pulley is coupled to the support formed on the rear surface of the reflector so that the reflector is rotated by rotation or movement of the first pulley,
The first wire passes through the upper end or lower end of the second pulley, the lower end or upper end of the first pulley, and the upper end or lower end of the third pulley.
◈Claim 2 was abandoned when the registration fee was paid.◈ According to claim 1,
The first pulley, the second pulley, and the third pulley are arranged such that two tangents of the first pulley coincident with the normal direction of the reflector overlap the tangents of the second pulley and the third pulley corresponding to the normal direction of the reflector, respectively. Heliostat angle adjustment device.
◈Claim 3 was abandoned when the registration fee was paid.◈ According to claim 1,
The centers of the second pulley and the third pulley are located on a first axis passing through the center of the reflector, and between the first pulley and the second pulley and between the first pulley and the third pulley are the first auxiliary pulley and the second auxiliary pulley, respectively. A heliostat angle adjusting device is disposed to change the direction of the first wire.
◈Claim 4 was abandoned when the registration fee was paid.◈ According to claim 1,
A second wire fixed to the rear surface of the reflector and applying a preload to rotation in the first axial direction;
a fourth pulley rotated by a second wire and disposed between the second pulley and the third pulley;
Heliostat angle adjusting device further comprising a.
◈Claim 5 was abandoned when the registration fee was paid.◈ According to claim 1,
A heliostat angle adjusting device in which the diameters of the first pulley, the second pulley, and the third pulley are all formed the same.

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