JPH07128575A - Lighting device for solar rays - Google Patents

Abstract

PURPOSE:To provide a lighting device for solar rays which can reflect solar rays appropriately and project it to the prescribed position. CONSTITUTION:In an optical sensor 11, a detecting range in which the maximum light quantity of solar rays is detected is specified out of plural detecting ranged previously classified, and a position of the sun is accurately detected based on the specified detecting range. And a reflecting mirror 4 is rotated in the direction of bearing and elevation by a bearing direction rotation deriving part 10 and a elevation direction rotation driving part 7 so that the reflecting mirror 4 reflects solar rays appropriately and projects it to the prescribed position based on a position of the sun accurately detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunlight collecting device for detecting the incident direction of sunlight with high accuracy and reflecting the sunlight to indoors or places where the sunshine conditions are not good.

[0002]

2. Description of the Related Art Conventionally, there has been known a sunlight collecting device which guides light from the sun indoors or in a place where the sunshine conditions are bad. An example of such a sunlight collecting device is, for example, Japanese Utility Model Laid-Open No. 62-1.
The one disclosed in No. 79615 is known. Figure 31
[Fig. 4] is a configuration diagram of a sunlight collecting device 220 disclosed in Japanese Utility Model Publication No. 62-179615. This solar lighting device 22
At 0, a motor 222 for rotating the reflection mirror 221 for reflecting sunlight in the elevation direction and a motor 223 for rotating it in the azimuth direction are fixed to the support base 225.
The rotations of the motors 222 and 223 are controlled by an elevation angle drive signal S224a and an azimuth drive signal S224b from a microcomputer (hereinafter referred to as a microcomputer) 224, respectively. The microcomputer 224 is equipped with a timer (not shown) for obtaining the date, and the internal memory (not shown) shows the installation location of the solar lighting device 220 and the history and latitude of the irradiation location. The data is stored.

In the sunlight collecting device 220, the position of the sun is calculated by the microcomputer based on the data indicating the date from the timer and the data indicating the history and latitude of the installation place, and the calculation result and the irradiation place. And the data indicating the latitude and the latitude are used to generate an elevation angle drive signal S224a and an azimuth drive signal S224b indicating the rotation of the reflection mirror 221 in the elevation angle direction and the azimuth direction. The elevation angle drive signal S2 is generated.
24a, the azimuth drive signal S224b is the motor 222, 22
3 are output respectively. Then, the elevation drive signal S
224a, the motor 22 according to the azimuth drive signal S224b
The reflecting mirror 221 is rotated in the elevation angle direction and the azimuth direction by driving 2, 223, and the sunlight reflected by the reflecting mirror 221 is appropriately irradiated to an appropriate position.

[0004]

However, in the above-mentioned sunlight collecting device 220, since the azimuth direction and the elevation direction of the reflecting mirror 221 are controlled based on the initial data and the data from the timer, for example, the actual installation place. If there is a discrepancy between the data indicating the position of the installation location and the data indicating the location of the installation location, appropriate control cannot be performed. In addition, it is necessary to store data according to the installation location in the internal memory, which is troublesome. Furthermore, in the sunlight collecting device 220, once the power is turned off, the data stored in the internal memory is erased, and the timer is cleared. Therefore, a backup power supply is required and the time is regularly adjusted. There is a problem that has to be.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a sunlight collecting device capable of appropriately reflecting sunlight and irradiating it to a predetermined position.

[0006]

In order to solve the above-mentioned problems of the prior art and to achieve the above-mentioned object, the sunlight collecting device of the present invention has a maximum sun among a plurality of detection ranges divided in advance. First light detecting means for specifying a detection range in which the amount of light is detected, and second for detecting the position of the sun based on the detection range specified by the first light detecting means.
The light detecting means, the light reflecting means for reflecting sunlight, and the first light rotating means for rotating the light reflecting means in the azimuth direction according to the position in the azimuth direction of the sun detected by the second light detecting means. It has a drive means and a second drive means for rotating the light reflection means in the elevation direction according to the position of the sun in the elevation direction detected by the second light detection means.

[0007]

In the sunlight collecting device of the present invention, the detection range in which the maximum amount of sunlight is detected is specified from the plurality of detection ranges preliminarily divided by the first light detecting means. Then, based on the detection range specified by the first light detection unit, the second light detection unit is moved so that the sun is located in a range that can be detected by the second light detection unit, for example. The position of the sun is detected with high accuracy by the second light detection means. Then, according to the position in the azimuth direction and the elevation angle direction of the sun detected by the second light detecting means, the first
The driving means and the second driving means rotate the light reflecting means in the azimuth direction and the elevation angle direction.

[0008]

EXAMPLE A solar lighting device according to an example of the present invention will be described below. FIG. 1 is a diagram for explaining an attachment example of the sunlight collecting device 1 according to the present embodiment.
As shown in FIG. 1, the sunlight collecting device 1 is attached to, for example, the roof of a general house, and detects the sunlight as described later to control the orientation of the reflecting mirror and the posture in the elevation angle direction, and The light is reflected indoors and reflected by a reflection mirror.

FIG. 2 is a diagram for explaining the configuration of the front side of the sunlight collecting device 1, FIG. 3 is a diagram for explaining the configuration of the side surface of the sunlight collecting device 1, and FIG. 4 is a sunlight collecting device. It is a figure for demonstrating the structure by the side of 1 plane. As shown in FIG. 2 to FIG.
The azimuth direction rotation drive unit 10 and the optical sensor 11 are provided on the upper portion of the character-shaped support base 2.
The mirror gripper 8 is attached to the rotary shaft 9 rotated by 0, and the disk-shaped reflection mirror 4 rotates in the elevation direction with respect to the mirror gripper 8 via the elevation direction rotation drive unit 7 and the bearing unit 6. It is attached freely. Also,
The sunlight collecting device 1 is provided with a case 3 so as to cover the reflection mirror 4, the mirror grip portion 8, the elevation direction rotation drive portion 7 and the bearing portion 6, and the case 3 supports the support base 2 via the case grip portion 5. It is fixed to. Further, the support base 2 is
For example, the fasteners 9 are attached to the columns 90 provided on the roof of a general house.
It is fixed by 1.

The sunlight collecting device 1 detects the incident direction of sunlight by the optical sensor 11, reflects the sunlight from this detecting direction by the reflection mirror 4, and irradiates it indoors through the window 12. The drive of the azimuth direction rotation drive unit 10 and the elevation angle direction rotation drive unit 7 is controlled. At this time, the rotary shaft 9 and the mirror gripper 8 are rotated in the azimuth direction by the rotational drive of the azimuth direction rotary drive unit 10, and the mirror gripper 8 along with the elevation direction rotary drive unit 7 and the bearing unit 6 are interlocked with this rotation. Rotate in the azimuth direction. Further, the reflection mirror 4 is rotated in the elevation direction by the rotation drive of the elevation direction rotation drive unit 7.

Hereinafter, each of the constituent elements of the sunlight collecting device 1 will be described in detail. Azimuth rotation drive unit 1
0 will be described. FIG. 5 is a front view for explaining the rotation driving operation in the azimuth direction rotation driving unit 10, and FIG. 6 is a azimuth direction rotation driving unit 10 from the direction A in FIG.
FIG. As shown in FIGS. 5 and 6, the azimuth direction rotary drive unit 10 has a worm 22 attached to a rotary shaft 21 that is rotationally driven by a motor 20.
A wheel 23 that meshes with the worm 22 is attached to the rotary shaft 9 that is orthogonal to the position 1. Further, the rotating shaft 9 is fixed to the mirror holding portion 8 by a screw 25 at its tip, and the mirror holding portion 8 rotates in the azimuth direction in conjunction with the rotation of the rotating shaft 9. The azimuth direction rotation drive unit 10 uses the azimuth drive signal generated according to the detection of the optical sensor 11 to drive the motor 20.
Is controlled to rotate, and the motor 20 drives the rotary shaft 21 and the worm 22 to rotate. Warm 22
The wheel 23 is rotated about the rotation axis 9 orthogonal to the rotation axis 21 in association with the rotation of the wheel 23, and the mirror gripper 8 is rotated in the azimuth direction together with the rotation axis 9 in association with the rotation of the wheel 23.

As shown in FIG. 6, the wheel 23 is provided with a fastener 26, one end of which is fastened by the fastener 26 and the other end of which is fixed to the support base 2 (not shown). ), And a spring 27 wound around the rotating shaft 9 is attached. The spring 27 is deformed according to the rotation of the wheel 23, and an elastic force corresponding to this deformation is generated.
The elastic force of the spring 27 acts on the wheel 23 so that the wheel 23 rotates in one direction, thereby stabilizing the rotation of the wheel 23 and mitigating the backlash that occurs during the rotation. Further, due to the elastic force of the spring 27, for example, the worm 22 is pressed in one direction, thereby suppressing the rattling of the bearing (bearing) in the thrust direction. As a result, it is possible to position the reflecting mirror 4 with high accuracy in the azimuth direction.

FIG. 7 is a diagram for explaining a sensor for detecting a rotation angle provided in the azimuth direction rotary drive unit 10, and the azimuth direction rotary drive unit 10 from the direction B in FIG.
FIG. As shown in FIG. 7, the azimuth direction rotation drive unit 10 is provided with return switches 92a and 92b and a limit switch 93. A protrusion (not shown) provided on the disc 94 attached to the rotating shaft 9.
These are turned on / off.

The return switches 92a and 92b limit the azimuth direction rotation region of the reflection mirror 4. In particular,
The motor is turned on when the rotation axis 9 reaches a rotation angle such that the azimuth direction rotation angle of the reflection mirror 4 exceeds the azimuth direction rotation area, and the turning mirror 9 is turned on to rotate the reflection mirror 4 in the azimuth direction direction. Reverse the direction of rotation of 20. The limit switch 93 is the return switch 92.
When the control of the motor 20 by a and 92b does not function properly and an emergency occurs in which the reflection mirror 4 rotates beyond the azimuth direction rotation region, the power supply to the motor 20 is forcibly cut off. The damage of the sunlight collecting device 1 is prevented.

FIG. 8 shows the return switches 92a and 92b.
It is a figure for explaining. As shown in FIG.
4 is provided with a protrusion 97, and the protrusion 97 rotates in accordance with the rotation of the disc 94 which is interlocked with the rotating shaft 9.
7 is a lever 92a for the return switches 92a and 92b
By pressing 1, 92b1, the return switch 92
a and 92b are turned on. Levers 92a1 and 92b1
Has one end fixed, for example, the lever 92a1 is pushed only by the protrusion 97 when the disc 94 rotates forward, and the lever 92b1 is pushed only by the protrusion 97 when the disc 94 rotates backward. Pushed in.
As a result, the rotation shaft 9 rotates at a rotation angle such that the protrusion 97 is located in the azimuth direction rotation region 96.

9A and 9B are views for explaining the limit switch 93. FIG. 9A is a front view and FIG. 9B is a side view. As shown in FIG. 9A, a protrusion 95 is provided on the disc 94.
Is provided, and the protrusion 95 pushes the pressed portion 93a of, for example, a hemispherical shape of the limit switch 93 by the rotation of the disk 94 that is interlocked with the rotation shaft 9,
3 turns on. The protrusion 95 has a shape having tapered surfaces 95a and 95b as shown in FIG. 10, for example.
As shown in FIG. 9A, the projection 95 has, for example, the tapered surface 95a pressing the pressed portion 93a by the positive rotation of the disk 94, and the tapered surface 95b by the reverse rotation of the disk 94. Presses the pressed portion 93a and the projection 95 enters the limit switch 93 from either the forward or reverse rotation direction, the limit switch 93 can be appropriately turned on (pressed).

As described above, according to the limit switch 93, unlike the return switches 92a and 92b described above, the limit switch 93 is turned on only when the protrusion enters only from one of the forward and reverse rotation directions. Since the switch can be turned on regardless of whether the protrusion 95 enters from the forward direction or the reverse direction of the mechanism, it is possible to reduce the number of switches and reduce the size of the switch mechanism. Further, according to the limit switch 93, the on / off operation can be performed without using a lever that is relatively unstable in operation, and the reliability of the operation can be improved. Further, since the limit switch 93 can be downsized, the return switches 92a and 92b can be arranged close to each other, and the rotation area of the reflection mirror 4 defined by the return switches 92a and 92b is widened. It becomes possible. As described above, the shape of the protrusion 95 of the limit switch 93 is such that, regardless of whether the disc 94 enters the pressed portion 93a from the normal direction or the reverse direction, the pressed portion 93a is pressed.
The shape is not limited to that shown in FIG. 10 as long as it has a tapered surface capable of pressing. For example, a tip having a circular shape may be used.

As shown in FIG. 9B, the limit switch 93 is fixed to, for example, the fixed portion 99 of the azimuth direction rotary drive unit 10 via an elastic joint 140, and the projection 95 is interposed via an elastic joint 141. It is fixed to the disc 94. Therefore, when the protrusion 95 and the limit switch 93 come into contact with each other, the joints 140 and 141 are deformed, and damage due to the impact of contact is suppressed.

In the azimuth direction rotary drive unit 10, a limit switch 93 is provided at a position shown in FIG. 7 so that the return switches 92a and 92b can be arranged closer to each other, and the rotary shaft 9 has a predetermined rotation angle. A protrusion 95 is provided at a position on the disk 94 where the limit switch 93 is turned on when the limit is reached.

FIG. 11 is a view for explaining the elevation direction rotary drive unit 7, (A) is a front view of the elevation direction rotary drive unit 7 from the direction A in FIG. 4, and (B) is (A). 3 is a plan view from the direction A in FIG. 12 is shown in FIG.
It is a side view of the elevation direction rotation drive part 7 from the direction B of (A). As shown in FIGS. 11 and 12, the elevation direction rotation drive unit 7 includes a reflection mirror receiving plate 4 that holds the reflection mirror 4.
A gear 32 is provided on a rotary shaft 31 which is rotatably driven by a motor 30 fixed on a, and a rotary shaft 37 is provided in parallel with the rotary shaft 31 and fixed to the reflection mirror receiving plate 4a.
Is provided with a gear 33 so as to mesh with the gear 32. A worm 35 is provided on the rotating shaft 37 so as to be located above the gear 33. The mirror grip 8 has
A rotation shaft 38 for rotating the reflection mirror 4 in the elevation direction.
Is rotatably supported, and a wheel 36 that meshes with the worm 35 is fixedly provided.

In the elevation direction rotation drive unit 7, the optical sensor 11
Is driven to rotate the reflection mirror 4 in the elevation direction, and the rotation shaft 31 and the gear 32 are rotated by the drive from the motor 30. The shaft 37 and the worm 35 are rotated. At this time, since the worm 35 and the wheel 36 are fixed to the mirror grip portion 8,
The worm 35 moves along the periphery of the wheel 36 according to the rotation thereof, and the rotation shaft 37 and the reflection mirror receiving plate 4a and the reflection mirror 4 integrally fixed to the rotation shaft 37 rotate as the worm 35 moves. It is rotated about the axis 38 in the elevation direction.

In the sunlight collecting device 1, the relatively heavy elevation angle rotation drive unit 7 is attached so that the center of gravity is located slightly below the rotation axis in the elevation direction on the back surface of the reflection surface of the reflection mirror 4. And the elevation direction rotation drive unit 7
Due to the weight of, the force to rotate in one direction is always applied to the reflection mirror 4 in the elevation angle rotation region. Therefore, the reflection mirror 4 can be rotated in the elevation angle direction in a relatively stable state, and the backlash generated between the worm 35 and the wheel 36 is reduced. Further, the worm 35 is pressed in one direction by the weight of the elevation direction rotational drive unit 7, and thereby the rattling of the bearing (bearing) in the thrust direction is suppressed. As a result, the rotary positioning of the reflection mirror 4 in the elevation direction can be performed with high accuracy.

The bearing 6 will be described. FIG.
(A) is a front view of the bearing section 6 from the direction B in FIG. 4, and (B) is a plan view of the bearing section 6 from the direction A in (A). FIG. 14 is a side view of the bearing portion 6 from the direction B in FIG. As shown in FIGS. 13 (A) and 13 (B), the bearing portion 6 is provided with the shaft 40 fixed to the mirror grip portion 8 and is a joint fixed to the reflection mirror receiving plate 4a. Reference numeral 43 (hatched portion) is rotatably attached to the shaft 40 via a bearing 42. As shown in FIG. 14, the bearing unit 6 is provided with return switches 100a and 100b and a limit switch 101. By turning on / off these switches, the motor 30 for rotating the reflection mirror 4 in the elevation direction is driven. Is controlled. Return switch 10
0a and 100b are the return switches 92a and 9 described above.
2b, and the limit switch 101 has the same function as the limit switch 93 described above. These switches keep the rotation of the reflection mirror 4 within the rotation region in the elevation direction, and prevent the sunlight collecting device 1 from being damaged by the abnormal rotation of the reflection mirror 4 in the elevation direction.

The optical sensor 11 will be described. FIG. 15 is a diagram for explaining the configuration on the front side of the optical sensor 11, FIG. 16 is a diagram for explaining the configuration on the side surface of the optical sensor 11, and FIG. 17 is a diagram for the planar side of the optical sensor 11. It is a figure for demonstrating a structure. As shown in FIG. 16, the optical sensor 11 is mainly configured by a fine detection optical sensor unit 50, a coarse detection optical sensor unit 62, an elevation direction rotation drive unit 60, and an azimuth direction rotation drive unit 61, and supports the same. An azimuth direction rotation drive unit 61 and a coarse detection optical sensor unit 62 are fixedly provided on a platform 68, and an elevation angle direction rotation drive unit 60 and a fine detection optical sensor unit 50 are sequentially provided above the azimuth direction rotation drive unit 61. Has been.

In the optical sensor 11, the azimuth direction in which sunlight is incident is roughly detected by the coarse detection optical sensor section 62. Then, based on the detection result of the coarse detection optical sensor unit 62, the drive of the azimuth direction rotation drive unit 61 is controlled so that the light shielding plate 70 of the fine detection optical sensor unit 50 faces the azimuth direction of the sun, and the elevation angle direction. The fine detection optical sensor unit 50 is rotated in the azimuth direction together with the rotation drive unit 60. Next, based on the output signal from the fine detection optical sensor unit 50, the elevation direction rotation drive unit 60 and the azimuth direction rotation are arranged so that the light shielding plate 70 accurately faces the azimuth direction and the elevation angle direction in which sunlight is incident. The drive of the drive unit 61 is controlled.

The elevation direction rotation drive unit 60 drives the rotation of the fine detection optical sensor unit 50 in the elevation direction, has a motor 54, and is rotationally driven by the motor 54, as shown in FIGS. The worm 53 is meshed with the wheel 58 attached to the rotary shaft 52,
2 is further provided with a fine detection optical sensor section 50 via a joint 51.
Is attached. The azimuth direction rotation drive unit 61 drives movement of the fine detection optical sensor unit 50 in the azimuth direction, and FIG.
As shown in FIG. 5 and FIG. 16, the worm 56 that has a motor 55 and is rotationally driven by the motor 55 has a rotating shaft 6
9 is engaged with a wheel 57 attached to the shaft 9, and an elevation angle direction rotary drive unit 60 is fixedly attached to the rotary shaft 69.

Further, in the elevation direction rotary drive unit 60, one end is fastened by a fastener 64 fixed to the elevation direction rotary drive unit 60, the other end is fixed to the joint 51, and a spring 63 wound around the rotary shaft 52. Is attached, and backlash that occurs between the worm 53 and the wheel 57 when the fine detection optical sensor unit 50 is rotated in the elevation angle direction and the elastic force of the rattling spring 63 in the thrust direction of the bearing (bearing). It is alleviated, and the fine detection optical sensor unit 50 can be positioned with high accuracy in the elevation angle direction. Further, one end is fastened with a fastener 66 fixed to the elevation rotation drive unit 60, the other end is fastened with a fastener 67 fixed to the azimuth rotation drive unit 61, and is wound around a rotation shaft 69. A backlash and a bearing (bearing) generated between the worm 56 and the wheel 57 when the spring 65 is attached and the fine detection optical sensor unit 50 is rotated in the azimuth direction.
The rattling in the thrust direction is relaxed by the elastic force of the spring 65, which enables highly accurate positioning of the fine detection optical sensor unit 50 in the azimuth direction.

The rough detection optical sensor section 62 will be described. As shown in FIG. 17, the coarse detection optical sensor unit 62 includes:
Optical sensors 80a, 80b, 80c are provided at intervals of about 70 degrees from the point O in the azimuth direction, and the sun moves in the azimuth direction corresponding to the optical sensor that detects the sun light most strongly among these optical sensors. Judge to be located.

FIG. 18 shows the optical sensor 80a shown in FIG.
It is an external view of 80b and 80c. As shown in FIG. 18A, the optical sensor 80a has a configuration in which the photosensor 81a is embedded inside a “U” -shaped light blocking portion 82b having a predetermined thickness. As shown in FIGS. 18B and 18C, the optical sensors 80b and 80c have a configuration in which photosensors 81a and 81b are embedded in L-shaped light blocking portions 82b and 82c having a predetermined thickness, respectively. ing.

The detection range of the photo sensor 81 in the azimuth direction is the detection range 83 shown in FIG. 19A, but the detection ranges of the optical sensors 80a, 80b, 80c are respectively determined by the light blocking sections 82a, 82b, 82c. As a result of blocking the light from the azimuth direction, the detection ranges 84a, 84b, 84c shown in FIGS. 19B, 19C, and 19D are obtained.

In this way, the light blocking portions 82a, 82b, 8
By providing 2c, the light blocking portions 82a, 82b, 8
By adjusting the shape of 2c, the optical sensors 80a, 80
It is possible to reduce the detection range overlapping with b and 80c in the azimuth direction, and to appropriately detect the azimuth direction in which sunlight is incident. That is, for example, if two photosensors have a very wide overlapping detection range in the azimuth direction, when the sunlight is located in this overlapping range,
Since each of the two optical sensors senses the sunlight with the same intensity, it is impossible to determine which of the optical sensors corresponds to the position of the sun. According to this, the size of such overlapping detection ranges can be reduced. In addition, the light blocking portions 82a, 82
In b and 82c, since the light blocking member is not provided in the elevation direction, it is possible to detect light in a wide range in the elevation direction.

When the sun is located in such an overlapping detection range, it is determined that the intermediate position of the optical sensor corresponding to the overlapping detection range is the position of the sun. For example, in FIG.
In the detection range 85 shown by 0, it is determined that the intermediate position between the optical sensor 80a and the optical sensor 80c is the position of the sun.

FIG. 21 shows photosensors 81a, 81b,
It is a figure for demonstrating the process of the signal output from 81c. As shown in FIG. 21, photosensors 81a, 81
The output signals from b and 81c are amplified by the amplifier 120 and output as A / A as output signals S81a, S81b and S81c.
It is output to the D converter 121. In the A / D converter 121, the output signals S81a, S81b, S81c are digitally converted, and the converted output signals S121a, S12
1b and S121c are output to the comparator 122. In the comparator 122, the output signals S121a, S121b, S
The photosensor that has detected the light most strongly is specified based on 121c, and the signal S122 indicating the result is determined by the decision unit 1
23 is output.

In the judging device 123, based on the signal S122, the azimuth drive signal S62a is generated so that the fine detection photosensor section 50 faces in the azimuth direction corresponding to the photosensor which has detected the light most strongly. Direction drive signal S6
2a is output to the motor 55. At this time, the determiner 12
In 3, the fine detection optical sensor unit 50 determines the elevation angle of the sun based on the specified photo sensor and the data indicating the position in the elevation angle direction of the sun stored in advance as data corresponding to the specified photo sensor. The elevation angle drive signal S62b is generated so as to face the position of the direction, and the elevation angle drive signal S62b is output to the motor 54.

For example, the determiner 123 generates the elevation drive signal S62b so that the elevation angle of the fine detection photosensor section 50 is 40 degrees when the photosensor that most strongly detects light is 81a. When the photosensors that have detected the light most strongly are 81b and 81c, the fine detection photosensor unit 5
The elevation angle drive signal S62b is generated so that the elevation angle of 0 becomes 30 degrees. In addition, the determiner 123 is the photo sensor 81a.
And 81b detect light having the same intensity, and the photosensors 81a and 81c detect light having the same intensity, the elevation angle of the fine detection optical sensor unit 50 is 35. The elevation drive signal S62b is generated so as to have a degree.

By providing such a rough detection optical sensor unit 62, even when the sun is located outside the detection range of the fine detection optical sensor unit 50, the coarse detection optical sensor unit 62 is used to detect the result based on the detection result. Drive the motors 54, 55 to rotate the fine detection optical sensor unit 50,
The sun can be located within the detection range of zero.

The fine detection optical sensor section 50 will be described. FIG. 22 is a diagram for explaining the fine detection optical sensor unit 50. As shown in FIG. 22, the fine detection optical sensor unit 50 includes a support rod 86 provided on a substrate 87.
A square light-shielding plate 70 is attached to the tip of the. Photosensors 88a, 88b, 88c, 88d for outputting output signals according to the intensity of the emitted light are provided on the substrate 87 at positions corresponding to the centers of the respective sides of the light shielding plate 70. That is, when the position of the sun and the light shielding plate 70 face each other accurately, the photo sensor 88a,
The shadow of the light shielding plate 70 is projected on the inner half of all of 88b, 88c, and 88d. At this time, for example, the difference in the amount of light detected by the photosensors 88a and 88c corresponds to the shift in the azimuth direction of the sun position with respect to the light shield plate 70, and the difference in the amount of light detected by the photosensors 88b and 88d corresponds to the light shield plate 70 in the sun position. Corresponds to the deviation in the elevation direction with respect to.

FIG. 23 shows photosensors 88a, 88b,
It is a figure for demonstrating the process of the output signal output from 88c, 88d. As shown in FIG. 23, output signals S88 from the photosensors 88a, 88b, 88c, 88d.
The signals a, S88b, S88c, and S88d are amplified by the amplifier 89 and output to the A / D converter 110. In the A / D converter 110, the output signals S88a, S88b, S
88c and S88d are digitally converted, the converted output signals S110a and S110c are output to the comparator 111a, and the output signals S110b and S110d are output to the comparator 111.
is output to b. In the comparator 111a, the output signal S
110a and S110c are compared, for example, which of the photosensors 88a and 88c senses strong light is determined, the difference between the output values of both photosensors is determined, and a signal indicating the comparison result is obtained. S111a is output to the determiner 112a. In the comparator 111b, the output signals S110b and S110d are compared, and the comparator 111
As in the case of a, the signal S111b indicating the comparison result is
It is output to 12b.

In the decision unit 112a, the signal S111a
Based on the above, an azimuth drive signal for driving the rotation of the fine detection optical sensor unit 50 in the azimuth direction is generated so that the light shielding plate 70 accurately faces the sun, and this azimuth drive signal is output to the motor 55. In the determiner 112b, the signal S1
Based on 11b, an elevation angle drive signal for driving the rotation of the fine detection optical sensor unit 50 in the elevation angle direction is generated so that the light shielding plate 70 accurately faces the sun, and this elevation angle drive signal is output to the motor 54. . A / D converter 11 described above
0, comparators 111a and 111b, determiners 112a and 11
The process in 2b is performed using, for example, a microcomputer.

The above-described processing is performed until the light shielding plate 70 exactly faces the sun, that is, the photo sensors 88a and 88a.
c and the output signals from the photo sensors 88b and 88d are equalized. That is, at the time when the above-described processing is completed, the light shielding plate 70 is accurately facing the sun, and the movement amount of the reflection mirror 4 is determined based on the attitude of the fine detection optical sensor unit 50 at this time. (Not shown). Then, based on the calculation result, the azimuth direction rotation drive unit 10 described above is arranged so that the reflection mirror 4 has an attitude that appropriately reflects the sunlight indoors.
Motor 20 and motor 30 of the elevation direction rotation drive unit 7
The drive signal output to is generated.

FIG. 24 shows the fine detection optical sensor unit 5 according to the relationship between the position of the sun and the attitude of the fine detection optical sensor unit 50.
It is a figure for demonstrating the shadow of the light-shielding plate 70 projected on the photosensors 88a, 88b, 88c, and 88d of 0. In the fine detection optical sensor unit 50, when the light shielding plate 70 accurately points in the direction of the sun, the photo sensors 88a, 88
In all of b, 88c, and 88d, the shadow of the light shielding plate 70 is projected on the half area thereof.

For example, FIG. 24 (A) and FIG. 24 (B)
24C is a case where the sun is displaced in the azimuth direction with respect to the light shielding plate 70, and FIGS. 24C and 24D show the light shielding plate 70.
In contrast, the sun is offset in the elevation direction.

FIG. 24A is a view for explaining the shadow of the light shielding plate 70 when the sun is at the position closer to the photo sensor 88a with respect to the light shielding plate 70. The photo sensor 88c is the photo sensor 88a. The area where the shadow is projected is larger than. In this case, the output value from the photo sensor 88a is larger than the output value of the photo sensor 88c in a magnitude according to the degree of deviation of the sun in the elevation direction. FIG. 24B is a diagram for explaining the shadow of the light shielding plate 70 when the sun is located near the photo sensor 88c with respect to the light shielding plate 70.
The area where a shadow is projected is larger in a than in the photo sensor 88c. FIG. 24C is a diagram for explaining the shadow of the light blocking plate 70 when the sun is near the photo sensor 88d with respect to the light blocking plate 70. The area where the shadow is projected is large. In this case, the output value from the photo sensor 88d is larger than the output value of the photo sensor 88b in a magnitude corresponding to the degree of deviation of the sun in the elevation direction. FIG. 24D is a diagram for explaining the shadow of the light shielding plate 70 when the sun is located closer to the photo sensor 88b with respect to the light shielding plate 70. The area where the shadow is projected is large.

According to the fine detection optical sensor section 50, even when there is a slight positional deviation between the sun and the light shielding plate 70, the difference in the output values from the photosensors provided at the opposing positions is the same as that of the conventional one. This is larger than the case, and the position of the sun can be detected with high accuracy.

The system and processing of the above-mentioned sunlight collecting device 1 will be briefly summarized below. FIG. 25 is a diagram for explaining the basic system of the sunlight collecting device 1, and FIG. 26 is a flowchart of processing in the sunlight collecting device 1. Step S1: The user selects an irradiation mode for irradiating the predetermined irradiation position with the sun and a setting mode for setting the irradiation position. Step S2: Executed when the irradiation mode is selected by the selection in Step S1, and by the user,
The irradiation position where sunlight is reflected and irradiated is input.

Step S3: The rough detection optical sensor unit 62 roughly detects the direction of the sun, and the azimuth drive signal S62a and the elevation drive signal S6 corresponding to the detection result.
2b (see FIG. 21) is output to the azimuth direction rotation drive unit 61 and the elevation angle direction rotation drive unit 60, and the fine detection optical sensor unit 50 is rotated in the direction of the sun. Step S4: The azimuth direction and the elevation angle direction of the sun are detected with high accuracy by the fine detection optical sensor unit 50, and the azimuth drive signal S50a and the elevation angle drive signal S50b (FIG. 23) according to the detection result and the irradiation position input in advance. reference)
Is an azimuth rotation drive 61 and an elevation rotation drive 6
0, and the fine detection optical sensor unit 50 is further rotated in the azimuth direction and the elevation angle direction. This process
The process is performed until the light-shielding plate 70 faces the sun accurately, and when the processing is completed, the azimuth direction rotation drive unit 61 indicates a azimuth direction rotation position signal S61, and the elevation angle direction rotation drive unit 60 indicates a elevation position rotation position signal. S60 is the control unit 125
Is output to.

Step S5: In the control section 125, based on the signals S61 and S60, the reflecting mirror receiving plate 4a.
Is calculated, and the amount of movement of the reflection mirror receiving plate 4a is calculated. Then, based on the calculation result, the azimuth drive signal S125a and the elevation drive signal S12 for setting the reflection mirror 4 in an attitude that appropriately reflects the sunlight indoors.
5b is generated and output to the azimuth direction rotation drive unit 10 and the elevation direction rotation drive unit 7, respectively. Then, in accordance with the azimuth drive signal S125a and the elevation drive signal S125b, the azimuth direction rotation drive unit 10 and the elevation angle direction rotation drive unit 7 perform rotational drive, and the reflection mirror 4 is placed in an attitude that appropriately reflects sunlight indoors. Is rotated.

Hereinafter, a usage mode of the sunlight collecting device 1 will be described. In the above-described embodiment, the case where the sunlight collecting device 1 is mounted on the roof as illustrated in FIG. 1 is illustrated, but the mounting form of the sunlight collecting device 1 is, for example, on a wall as illustrated in FIG. 27 (A). Installation, Fig. 27
It may be attached to the projecting portion as shown in (B), or may be attached to a supporting column longer than that in FIG. 27 (A) as shown in FIG. 28. FIG. 29 is an example in which a plurality of sunlight collecting devices 1 are attached to a general house. As described above, the sunlight collecting device 1 has various mounting configurations due to its structure,
It can be installed in various places. In addition, the range in which sunlight can be radiated is extremely wide depending on the setting of the irradiation position, which is highly practical. FIG. 30 shows an example in which a plurality of sunlight collecting devices 1 are attached to a building and a general house. When the sunlight collecting device 1 is used as shown in FIG. 30, even when a high-rise building is constructed, it is possible to improve the sunlight irradiation environment in the surrounding general houses. As shown in FIGS. 29 and 30, when using a plurality of sunlight collecting devices 1, the azimuth direction and the elevation angle direction of the reflecting mirror 4 are determined by the method described above for one of the plurality of sunlight collecting devices 1. It is also possible to generate an azimuth drive signal and an elevation angle drive signal for driving the rotation of, and use the azimuth drive signal and the elevation angle drive signal in the remaining solar lighting device 1.

[0049]

According to the sunlight collecting device of the present invention, the first
Since the detection range in which the maximum sunlight is detected is specified from among the plurality of detection ranges preliminarily divided by the light detection means, it is possible to detect the second light detection means based on the specified detection range. The sun can be located in a wide range. That is, even when the sun is located outside the range that can be detected by the second photodetector, for example, the second photodetector may detect the sun depending on the detection range specified by the first photodetector. The second light detecting means can be moved to a position where the position can be detected, and the position of the sun can be detected with high accuracy and certainty by the second light detecting means. As a result, according to the sunlight collecting device of the present invention,
The light reflecting means can be appropriately rotated based on the detected position of the sun to appropriately reflect the sunlight and irradiate it at a predetermined position. Further, according to the sunlight collecting device of the present invention,
Even when the power supply to the sunlight collecting device is stopped due to a power failure, the sun position is detected by the first light detecting means and the second light detecting means after the power is supplied again, so that the conventional sun is detected. A backup power source such as a light harvesting device is unnecessary. Furthermore, according to the sunlight collecting device of the present invention, when the sunlight is reflected using a plurality of sunlight collecting devices, the position of the sun is detected for one of them,
It is also possible to use the detection result in the remaining sunlight collecting devices.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an attachment example of a sunlight collecting device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining the configuration on the front side of the sunlight collecting device shown in FIG.

FIG. 3 is a diagram for explaining a configuration of a side surface side of the sunlight collecting device shown in FIG.

FIG. 4 is a diagram for explaining the configuration of the sunlight collecting device shown in FIG. 1 on the plane side.

FIG. 5 is a front view for explaining the rotation driving operation in the azimuth direction rotation driving unit.

FIG. 6 is a side view of the azimuth direction rotary drive unit from the direction A in FIG.

FIG. 7 is a plan view of the azimuth direction rotary drive unit from the direction B in FIG.

FIG. 8 is a diagram for explaining a return switch.

9A is a front view for explaining a limit switch, and FIG. 9B is a side view.

FIG. 10 is a diagram for explaining a protrusion used in a limit switch.

11A and 11B are views for explaining the elevation angle rotation drive unit, FIG. 11A is a front view of the elevation angle rotation drive unit from the direction A in FIG. 4, and FIG. 11B is a direction A in FIG. FIG.

FIG. 12 is a side view of the elevation direction rotation drive section from the direction B of FIG. 11 (A).

13A is a front view of the bearing section from the direction B in FIG. 4, and FIG. 13B is a plan view of the bearing section from the direction A in FIG.

FIG. 14 is a side view of the bearing section from the direction B in FIG. 13 (A).

FIG. 15 is a diagram for explaining the configuration of the front side of the optical sensor.

FIG. 16 is a diagram for explaining the configuration of the side surface of the optical sensor.

FIG. 17 is a diagram for explaining the configuration of the optical sensor on the plane side.

FIG. 18 is an external view of an optical sensor.

FIG. 19 is a diagram for explaining detection ranges of a photo sensor and an optical sensor.

FIG. 20 is a diagram for explaining overlapping detection ranges of adjacent optical sensors.

FIG. 21 is a diagram for explaining processing of an output signal output from the photo sensor of the photo sensor unit for rough detection.

FIG. 22 is a diagram for explaining an optical sensor unit for fine detection.

FIG. 23 is a diagram for explaining processing of an output signal output from the photo sensor of the fine detection optical sensor unit.

FIG. 24 is a diagram for explaining a shadow projected on the photosensor of the fine detection optical sensor unit according to the relationship between the position of the sun and the attitude of the fine detection optical sensor unit.

FIG. 25 is a system configuration diagram of a sunlight collecting device.

FIG. 26 is a flowchart of a process of the sunlight collecting device.

[Fig. 27] Fig. 27 is a diagram for describing a mounting form example of a sunlight collecting device.

[Fig. 28] Fig. 28 is a diagram for describing an example of how the sunlight collecting device is attached.

[Fig. 29] Fig. 29 is a diagram for describing a usage example of the sunlight collecting device in a general house.

[Fig. 30] Fig. 30 is a diagram for describing a usage example of the sunlight collecting device in a high-rise building and a general house.

FIG. 31 is a diagram for explaining a conventional sun tracking daylighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Solar lighting device 2 ... Support stand 3 ... Case 4 ... Reflection mirror 5 ... Case holding part 6 ... Bearing part 7 ... Elevation direction rotation drive part (mirror) 8 ... Mirror holding part 9 ... Rotation axis 10 ... Azimuth direction rotation drive part (mirror) 11 ... Optical sensor 12 ... Window 22 ... Worm 23 ... Wheel 27 ... Spring 80a, 80b, 80c ... Optical sensor 88a, 88b, 88c, 88d ... Photo sensor 93 ... Limit switch 93a ... Pressed portion 95 ... Protrusions 95a, 95b ... Tapered surface 50 ... Fine detection optical sensor unit 60 ... Elevation direction rotation drive unit (sensor) 61 ... Azimuth direction rotation drive unit (sensor) 62 ... Coarse detection optical sensor unit

Claims (2)

[Claims] 1. A sunlight collecting device for reflecting sunlight and irradiating it to a predetermined position, a first light for specifying a detection range in which a maximum amount of sunlight is detected among a plurality of detection ranges divided in advance. A detection means, a second light detection means for detecting the position of the sun in the azimuth direction and the elevation angle direction based on the detection range specified by the first light detection means, and a light reflection means for reflecting sunlight. A first driving unit that rotates the light reflecting unit in the azimuth direction according to the position of the sun in the azimuth direction detected by the second light detecting unit; A sunlight collecting device having a second drive unit that rotates the light reflection unit in the elevation direction according to the position of the sun in the elevation direction. 2. The second light detecting means is moved so that the second light detecting means can detect the position of the sun with reference to the detection range specified by the first light detecting means. The sunlight collecting device according to claim 1, further comprising a driving unit of 3.