JP2930877B2 - Photodetector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photodetector, and more particularly, to a structure for mounting a sensor.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No.
In the sunlight collecting device disclosed in No. 8575, the position of the sun is detected by using a sensor unit for coarse detection and a sensor unit for fine detection. The coarse detection sensor unit has a plurality of optical sensors fixedly mounted at predetermined positions, and among these optical sensors, an optical sensor that detects the largest amount of sunlight can be used to roughly determine the sun position. To detect. In addition, the sensor unit for fine detection uses a pair of optical sensors that detect the direction of elevation of the sun by projecting a shadow of the light-shielding unit onto a partial area when the sunlight is incident from almost the front. Specify the position in the elevation direction. The sensor unit for fine detection similarly has a pair of optical sensors for detecting the azimuth direction of the sun, and specifies the position in the azimuth direction of the sun using the pair of optical sensors.

[0003]

However, in the above-described coarse detection sensor unit and fine detection sensor unit, in order to detect the position of the sun with high accuracy, the optical sensor is positioned and arranged with high accuracy. There is a need. In addition, there is a demand that the coarse detection sensor unit and the fine detection sensor unit be easily attached to and detached from the sunlight collecting device.

[0004] The present invention has been made in view of the background of the related art described above, and has as its object to provide a photodetector which can be easily positioned and easily detached.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art and achieve the above-mentioned object, a light detecting device of the present invention comprises a light detecting means and one end of the light detecting means. Mounting means having a first convex portion positioned in the direction of, and a second convex portion mounted on the mounting means and positioning the other end corresponding to the detection side of the light detecting means in the first direction. Mounting means having a guide portion for positioning the light detecting means in a second direction orthogonal to the first direction.

The light detecting means of the light detecting device of the present invention preferably has a substantially cylindrical shape having a predetermined flat surface, and when the mounting means is mounted on the mounting means, the light detecting means is flat. The surface and the predetermined surface of the mounting means are joined and positioned.

Further, in the light detecting device of the present invention, the positioning is performed by engaging an engaging portion provided on the mounting means with an engaged portion provided on the mounting means, and The mounting means is mounted on the mounting member.

Further, the light detecting device of the present invention has a light detecting means and a frame fixed at a predetermined position and fixed by pressing the light detecting means from the front via an elastic member.

The light detecting means of the light detecting device of the present invention preferably has a substantially cylindrical shape having a predetermined flat surface, and when fixed to the frame, the flat surface and the frame are fixed. Is positioned by bonding with a predetermined surface of

Preferably, the photodetector of the present invention further comprises a light-shielding portion and a joint supporting the light-shielding portion, wherein the light-detecting means detects the light when the light is substantially incident from the front. The shadows of the light-shielding portions are respectively projected on a part of the regions, and a pair of first and second pairs of first and second light-receiving portions for detecting an elevation direction in which light is incident.
And a pair of second light detection units that detect the azimuthal direction in which the light is incident, when the light is incident from almost the front, the shadows of the light-shielding units are respectively projected on some regions. The frame fixes the joint and presses and fixes the first light detection unit and the second light detection unit from the front via an elastic member.

Further, in the photodetector of the present invention, preferably, a second frame having a tapered opening whose inner diameter increases toward the front side is provided on the front side of the frame. The light detection unit and the second light detection unit
It is exposed to the front side through the opening of the second frame.

[0012]

In the light detecting device of the present invention, when the light detecting means and the mounting means are mounted on the mounting means, first, one end of the light detecting means is brought into contact with the first convex portion of the mounting means. In the first direction. Next, the mounting means is mounted on the mounting means while the light detecting means is fixed to the mounting means. At this time, the light detecting means is positioned in the first direction by bringing the second convex portion of the mounting means into contact with the other end corresponding to the detection side of the light detecting means. At the same time, the light detecting means is positioned in the second direction by the guide of the mounting means.

Further, in the light detecting device of the present invention, the light detecting means is fixed to the frame while the light detecting means is pressed against the frame via the elastic member.

[0014]

EXAMPLES The following first embodiment, will be described a solar position detecting device using a light detecting device according to a first embodiment of the present invention. In the present embodiment, a case where the shutter opening / closing operation driving unit is controlled based on the position of the sun detected by using the light detection device will be described as an example. FIG. 1 is a diagram for explaining the configuration on the front side of the sun position detection device, FIG. 2 is a diagram for explaining the configuration on the side surface of the sun position detection device, and FIG. FIG. 4 is a diagram for explaining the configuration on the plane side of the unit, FIG. 4 is a diagram for describing the configuration on the plane side of the azimuth rotation drive unit of the sun position detecting device and the arrangement of the limit switch and the return switch, and FIG. FIG. 3 is a diagram for explaining a control system of the position detection device.

As shown in FIGS. 1 and 5, the sun position detecting device 1 mainly includes a fine detecting light sensor portion 2 as a light detecting device, a coarse detecting light sensor portion 4 as a light detecting device, and an elevation angle direction. It comprises a rotation drive section 6, an azimuth direction rotation drive section 8, an azimuth direction rotation area defining section 9, and a control section 125. The fine detection optical sensor unit 2 can detect the position of the sun with high accuracy, but the detection range in the azimuth direction is relatively narrow. As shown in FIG. 3, the rough detection optical sensor unit 4 includes optical sensors 80a and 80a.
b, 80c, which can only detect the position of the sun roughly, but has a wide detection range in the azimuth direction. The azimuth direction rotation drive unit 8 drives the rotation of the fine detection optical sensor unit 2 in the azimuth direction.

The elevation rotation drive unit 6 is fixed to the upper part of the azimuth rotation drive unit 8, rotates in the azimuth direction by driving from the azimuth rotation drive unit 8, and rotates in the elevation direction of the fine detection optical sensor unit 2. Drive the rotation of. The azimuth direction rotation area defining unit 9 has a return switch and a limit switch, and turns on these switches when the fine detection optical sensor unit 2 rotates beyond a predetermined azimuth direction rotation area. The control unit 125 calculates the position of the sun based on the angle data from the elevation rotation drive unit 6 and the azimuth rotation drive unit 8, as shown in FIG. The control signal S125 is output to the unit 5. The shutter opening / closing drive section 5 drives a shutter opening / closing operation based on the control signal S125.

In the sun position detecting device 1, the position of the sun is roughly detected using the coarse detection optical sensor unit 4. Then, based on the detection result of the coarse detection optical sensor unit 4, the fine detection optical sensor is driven by the elevation rotation drive unit 6 and the azimuth rotation drive unit 8 so that the sun is positioned within the detection range. Rotate part 2 in elevation and azimuth directions. Thereafter, based on the detection result of the optical sensor unit 2 for fine detection, the optical sensor unit 2 for fine detection moves by the drive from the elevation rotation drive unit 6 and the azimuth rotation drive unit 8, and the optical sensor unit for fine detection. 2 faces the sun with high precision. Then, the elevation angle and azimuth direction angle data of the fine detection optical sensor unit 2 at that time are output from the elevation direction rotation drive unit 6 and the azimuth direction rotation drive unit 8 to the control unit 125. The control unit 125 detects the position of the sun based on the angle data,
Based on the detection result, a control signal S125 is output to the shutter opening / closing operation driving section 5, and the opening / closing operation of the shutter is controlled. In this case, the angle is angle data input according to the purpose of use, and is azimuth angle data elevation angle data azimuth angle data and elevation angle data.

Hereinafter, each component of the solar position detecting device 1 will be described in detail. First, the azimuth direction rotation drive unit 8 will be described with reference to FIGS. The azimuth rotation drive unit 8 has a motor 10, and a gear 12 is fixed to a drive shaft of the motor 10. The gear 14 is provided on the rotating shaft 17.
And the worm 19 are fixed. The rotating shaft 17 is supported by bearings 72 and 73 provided on the frame 56. The gear 14 meshes with the gear 12 and the worm 19 meshes with the wheel 18.
Is fixed to the rotating shaft 11. An elevation rotation drive unit 6 is fixed above the rotation shaft 11, and the fine detection sensor unit 2 rotates in the azimuth direction together with the elevation rotation drive unit 6 in accordance with the rotation of the rotation shaft 11.

As shown in FIG. 5, the azimuth direction rotation drive unit 8 receives azimuth drive signals S2a and S4a from the fine detection sensor unit 2 and the coarse detection sensor unit 4, and based on these signals, the motor 10 Is rotated at a predetermined rotation speed in a predetermined rotation direction. The rotation of the drive shaft of the motor 10
The gear 12, the gear 14, the rotating shaft 17, the worm 19 and the wheel 18 are sequentially transmitted to the rotating shaft 11 through
The elevation rotation drive unit 6 rotates according to the rotation of the rotation shaft 11. As described above, in the azimuth direction rotation drive unit 8, since the worm 19 and the wheel 18 are used in the final reduction unit of the path for transmitting the rotation of the drive shaft of the motor 10 to the rotation shaft 11, The effect of the generated backlash can be reduced, and the deviation of the rotation angle of the rotating shaft 11 can be suppressed.
As a result, the positioning of the fine detection sensor unit 2 in the azimuth direction can be performed with high accuracy, and the sun position can be detected with high accuracy.

Next, the azimuth rotation area defining section 9 will be described with reference to FIGS. On the upper part of the frame 56 fixed to the base 70, FIGS.
As shown in FIG. 6, a limit switch 13 and return switches 15a and 15b are fixedly provided at predetermined positions around the rotation shaft 11. A protrusion 50 is fixed to the rotating shaft 11 via a ground plate 52. The protrusion 50 rotates in accordance with the rotation of the fine detection optical sensor unit 2 in the azimuth direction, and the protrusion 5
By 0, the limit switch 13 and the return switches 15a, 15b are turned on / off.

As shown in FIG. 6, the return switch 15
Reference numerals a and 15b denote switches for defining an azimuth rotation region of the optical sensor unit 2 for fine detection. The return switches 15a and 15b are turned on when the fine detection optical sensor unit 2 reaches an azimuth rotation angle beyond a predetermined azimuth rotation area, and the on is used as a trigger to cause the control unit 125 to turn on. A control signal for reversing the rotation direction is output to the motor 10.

The return switch 15a has a lever 15a1 having one end fixed, and the lever 15a1 is only moved by the projection 50 when the rotating shaft 11 rotates in the reverse direction.
Is pushed in and turned on. The protrusion 50 has a tapered surface 5.
0a, has 50b, the tapered surface 50 a, pushes the lever 15 a 1. As a material of the protrusion 50, an elastic member such as stainless steel is used, for example. As described above, by using an elastic member as the material of the protrusion 50, the protrusion 50 allows the lever 15 of the return switch 15a to be moved.
When the a1 is pushed in, the protrusion 50 or the lever 15a1 can be prevented from being broken. Return switch 15b has a lever 15b1 of which one end is fixed, the rotation shaft 11 is only lever 15b1 by ingress of projection 50 when rotated in the forward direction is turned on is pushed. At this time, the projection 50 pushes the lever 15 b 1 by the tapered surface 50 b .

The limit switch 13 is used when the control of the motor 10 by the return switches 15a and 15b does not function properly, and an emergency occurs in which the optical sensor unit 2 for fine detection rotates beyond the azimuth rotation region. By forcibly turning off the power supply of the power supply 10, the destruction of the solar position detecting device 1 is prevented.

The limit switch 13 has a pressed portion 13a having a hemispherical shape. The tapered surface 50 of the projection 50 when the projection 50 enters by the rotation of the rotating shaft 11 in the forward direction.
The pressed portion 13a is pressed by b and turned on. When the protrusion 50 enters due to the rotation of the rotation shaft 11 in the opposite direction, the limit switch 13 is turned on by the pressed portion 13a being pressed by the tapered surface 50a of the protrusion 50.

As described above, in this embodiment, since both the limit switch 13 and the return switches 15a and 15b are turned on / off by the projection 50, the configuration is simple, the economy is excellent, and the apparatus is excellent. Can be downsized.

Next, the elevation rotation drive unit 6 will be described with reference to FIGS. The elevation direction rotation drive unit 6 is fixed to the upper part of the rotation shaft 11,
Rotates in the azimuth direction according to. One end of a spring 53 is fixed to the frame 52 of the elevation rotation drive unit 6, and the other end of the spring 53 is fixed to a frame 56 of the azimuth rotation drive unit 8. The spring 53 is attached so as to urge the elevation rotation drive unit 6 eastward when the fine detection optical sensor unit 2 is located southward.

A gear 28 is fixed to the drive shaft of the motor 26. The gear 22 and the gear 24 are fixed to the rotating shaft 60. The gear 28 and the gear 24 mesh with each other. The gear 20 and the worm 30 are fixed to the rotating shaft 61.
The gear 20 meshes with the gear 22. The wheel 32 and the joint 38 are fixed to the rotating shaft 34.
Are mounted on a frame 41. The wheel 32 and the worm 30 are engaged.

As shown in FIG. 5, the elevation rotation drive unit 6 receives elevation drive signals S2b and S4b from the fine detection sensor unit 2 and the coarse detection sensor unit 4, and based on these signals, the motor 26 Is rotated at a predetermined rotation speed in a predetermined rotation direction. The rotation of the drive shaft of the motor 26 is
Gear 28, gear 24, gear 22, gear 20, worm 3
0, and sequentially transmitted to the rotating shaft 34 via the wheel 32. The fine detection optical sensor section 2 rotates in the elevation direction according to the rotation axis 34. As described above, in the elevation rotation drive unit 6, since the worm 30 and the wheel 32 are used in the final reduction unit of the path for transmitting the rotation of the drive shaft of the motor 26 to the rotation shaft 34, the rotation is transmitted when the rotation is transmitted. The displacement of the rotation angle of the rotating shaft 34 due to the generated backlash can be reduced. As a result, positioning of the fine detection sensor unit 2 in the elevation angle direction can be performed with high accuracy, and the sun position can be detected with high accuracy.

A spring 36 is wound around the rotating shaft 34. One end of the spring 36 is fixed to a joint 38, and the other end of the spring 36 is fixed to a frame 41. The rotation of the rotation shaft 34 is urged by a spring 36 in one direction, for example, the direction of arrow C shown in FIG.

The rotating shaft 34 has protrusions 65a, 65b, 6
5c is fixed, and the levers of the return switches 64a and 64b are pushed in by the protrusions 65c, respectively.
As a result, the return switches 64a and 64b are turned on /
Turned off. By appropriately arranging the return switches 64a and 64b, the rotation area of the fine detection optical sensor unit 2 in the elevation direction is defined. That is, the return switches 64a and 64b are turned on when the fine detection optical sensor unit 2 reaches a rotation angle in the elevation direction that exceeds a predetermined rotation region in the elevation direction. A control signal for reversing the rotation direction is output from the motor 125 to the motor 26. Limit switch 1
3 is turned on by the pressed portions being pressed by the entry of the protrusions 65a and 65b.

Next, the rough detection optical sensor unit 4 will be described. As shown in FIG. 7, the coarse detection optical sensor unit 4 is provided with optical sensors 80a, 80b, and 80c at intervals of about 70 degrees in the azimuth direction from the point O. It is determined that the sun is located in the azimuth direction corresponding to the optical sensor that detected light most strongly.

The structure of the optical sensor 80a will be described.
FIGS. 8A and 8B are views for explaining the fixture 130 of the optical sensor 80a shown in FIG. 7, in which FIG. 8A is a plan view and FIG. 8B is a side view. As shown in FIG. 8 (B), the mounting fixture 130 has two holes 131b and two holes 131c formed in a mounting plate 131 having a substantially “U” shape near the center. As shown in FIG. 10B, the mounting fixture 130 is fixed to the frame 70 shown in FIG. 1 by screws 134 penetrating the holes 131c. Also, as shown in FIG. 10, the mounting tool 130 has a hole 131b and a hole 144 of the mounting tool 140 shown in FIG.
The mounting tool 140 is fixed by a screw 151 penetrating through a. As shown in FIG. 8, the mounting plate 131 has a hollow portion 131a formed therein, a boss 133 as a first convex portion, and a convex portion 1 located at a predetermined interval.
32 are formed. The boss 133, as shown in FIGS. 8B and 10, positions the photosensor 81a in the X-axis direction shown in FIG. 10B when the mounting tool 140 is mounted on the mounting tool 130. Photo sensor 8
The light receiving range of 1a is determined.

FIGS. 9A and 9B are views for explaining the mounting device 140 of the optical sensor 80a. FIG. 9A is a front view, FIG. 9B is a view as seen from the direction of arrow B shown in FIG. 9A, and FIG. Is (A)
FIG. 5 is a diagram viewed from the direction of arrow C shown in FIG. As shown in FIG. 9, the mounting tool 140 includes a substantially “U” -shaped plate 141.
And a plate 144 positioned orthogonal to the plate 141
Are formed as an integral structure.

The mounting device 140 is attached to the plate 144 as shown in FIG.
The two holes 144a are formed so as to coincide with the holes 131b of the mounting plate 131 when mounted on the mounting fixture 130 shown in FIG. The plate 141 protrudes inward,
A projection 143 as a second projection for positioning the photo sensor 81a is formed. A plate 142 is fixed to the bottom of the plate 141 as a guide for positioning the photosensor 81a. The tip of the plate 142 is a “V” -shaped tapered surface 142a, and by arranging the photosensor 81a along the tapered surface 142a, the photosensor 81a is aligned in the Y-axis direction shown in FIG. Determine the light receiving range of the photo sensor. Also,
Photosensor 81a utilizing the elasticity of tapered surface 142a
Is fixed with appropriate strength. The holding member of the photo sensor 81a has a D-cut 1 forming a flat surface on a part of its side surface.
50 is provided, and the side surface facing the D cut 150 is placed along the tapered surface 142a. Photo sensor 81a
The D-cut 150 shown in FIG.
When the attachment 40 is mounted on the attachment 130, the attachment 40 is surface-attached to the attachment plate 131 of the attachment 130, and the photosensor 81a is aligned in a stable state to determine the light receiving range of the photosensor 81a.

FIG. 10 shows the fixture 130 shown in FIG.
3A and 3B are configuration diagrams of the optical sensor 80a when the mounting tool 140 shown in FIG. 1 is mounted, wherein FIG. 3A is a plan view and FIG. As shown in FIG.
8 (A), (B) and FIG.
It is inserted so as to be located between the projections 132 of the fixture 130 from the directions of the arrows shown in (B) and (C). Then, as shown in FIG. 10B, by combining the leading end of the plate 141 and the hollow portion 131a using unevenness, the required dimensions can be secured even when the plate 141 is opened, and the light receiving range is kept constant. It is possible. And
The attachment 151 is attached to the attachment 130 by fixing the plate 144 and the attachment plate 131 by fixing the plate 144 and the attachment plate 131 by fixing the plate 144 and the attachment plate 131 in the holes 144a and 131b.

When the mounting device 140 is fixed to the mounting device 130, the photo sensor 81a is connected to the boss 133 shown in FIG.
And the convex portion 143 shown in FIGS. 9 and 10, the positioning is performed in the X-axis direction shown in FIG. 10B. Thus, according to the optical sensor 80a of the present embodiment,
The attachment / detachment of the attachment 140 with respect to the attachment 130 can be easily performed. In addition, according to the optical sensor 80a of the present embodiment, since the positioning can be performed with high accuracy, the sun position can be detected with relatively high accuracy. The structure of the optical sensors 80b and 80c is the same as that of the optical sensor 80 described above.
It is basically the same as the structure of a.

FIG. 11 shows photo sensors 81a, 81b,
It is a figure for explaining processing of a signal outputted from 81c. Note that the photo sensors 81b and 81c are
0b and 80c. FIG.
As shown in the figure, the output signals from the photo sensors 81a, 81b, 81c are amplified by the amplifier 120, and the output signal S
A / D converter 121 as 81a, S81b and S81c
Is output to In the A / D converter 121, the output signals S81a, S81b, S81c are digitally converted,
Converted output signals S121a, S121b, S121
c is output to the comparator 122. In the comparator 122, the photo sensor that has detected the light most strongly is specified based on the output signals S121a, S121b, and S121c, and a signal S122 indicating the result is output to the determiner 123.

The determinator 123 generates an azimuth drive signal S4a based on the signal S122 so that the optical sensor unit 2 for fine detection points in the azimuth direction corresponding to the photosensor that has detected the light most strongly. The azimuth drive signal S4a is output to the motor 10. At this time, the determination unit 123 performs the fine detection optical sensor unit based on the specified photosensor and data indicating the position of the sun in the elevation direction stored in advance as data corresponding to the specified photosensor. An elevation drive signal S4b is generated so that 2 faces the position in the elevation direction of the sun, and this elevation drive signal S4b is output to the motor 26.

For example, when the photosensor that most strongly detects light is 81a, the determiner 123 sets the elevation angle drive signal S so that the elevation angle of the fine detection optical sensor unit 2 becomes 40 degrees.
4b, and the photo sensor that detected light most strongly was 8
In the case of 1b and 81c, the elevation angle drive signal S4b is generated so that the elevation angle of the fine detection optical sensor unit 2 becomes 30 degrees. In addition, the determiner 123 includes the photo sensors 81a and 81
When b detects light having the same intensity, and when the photo sensors 81a and 81c detect light having the same intensity, the elevation angle of the fine detection optical sensor unit 2 is 35 degrees. The elevation drive signal S4b is generated such that

By providing such a coarse detection optical sensor unit 4, even when the sun is located outside the detection range of the fine detection optical sensor unit 2, based on the detection result by the coarse detection optical sensor unit 4. By driving the motors 26 and 10 to rotate the fine detection optical sensor unit 2, the sun can be positioned within the detection range of the fine detection optical sensor unit 2.

Next, the fine detection optical sensor unit 2 will be described. FIG. 12 is a diagram for explaining the optical sensor unit 2 for fine detection. As shown in FIG. 12, the fine detection optical sensor unit 2 has a support bar 86 provided on a substrate 87, and a square or round light-shielding plate 70 is attached to the tip of the support bar 86. Photosensors 88a, 88b, 88c, and 8 that output an output signal corresponding to the intensity of the irradiated light are provided at a position corresponding to the center of each side of the light shielding plate 70 on the substrate 87.
8d are provided. That is, when the position of the sun and the light-shielding plate 70 face exactly, the shadow of the light-shielding plate 70 is projected on the inner half of all of the photosensors 88a, 88b, 88c, and 88d. At this time,
For example, the difference between the amounts of light detected by the photo sensors 88a and 88c corresponds to a shift in the azimuth direction of the sun position with respect to the light shielding plate 70, and the difference between the amounts of light detected by the photo sensors 88b and 88d corresponds to the elevation angle with respect to the light shielding plate 70 at the sun position. Corresponding to the deviation.

FIG. 13 is a cross-sectional view for explaining a cross-sectional structure of the fine detection sensor unit 2. As shown in FIG. Sensor unit 2 for fine detection
As shown in FIG. 13, the plate 87 is fixed to the joint 38 by screws 167. Plate 87, 162
Is provided with four holes at a predetermined distance from the center, and the photosensors 88a, 88b, 88
c and 88d are stored. As shown in FIG. 13, the plates 87 and 162 are provided with holes through which one end of the support rod 86 can pass, and through this hole, one end 86a of the support rod 86 having a thread groove formed. It protrudes to the left of the plate 162 and is fixed by screws 163. At this time, the plate 160 is moved to the plate 8 by the support rod 86.
7 and is fixed, and at the same time, the photo sensors 88a to 88d are fixed. Also, the photo sensor 88a
88d are pressed toward the plate 160 via an elastic member plate 168 such as a sponge. The photo sensors 88a to 88d are the same as the photo sensor 81a described with reference to FIG.
The D-cut for forming a flat surface on some of the side surfaces is also applied to the holding members of ~ 88d. By imposing the D-cut surface on the inner surface of the frame 87, the photo sensor 88a
To 88d are positioned and fixed to the frame 87 with high precision.

The plate 160 has holes through which the support rods 86 pass, and photosensors 88a, 88b, 88c, 88.
A hole 160a as an opening having a tapered surface for exposing d is provided. In this way, by forming the hole 160a using the tapered surface, external sunlight can be incident on the light receiving portions 88a1 and 88c1 from a wide range of directions,
The photosensors 88a to 88d can have a wide light receiving range. A light-shielding plate 70 is fixed to the other end of the support rod 86 using a screw 166.

FIG. 14 shows photo sensors 88a, 88b,
It is a figure for explaining processing of output signals outputted from 88c and 88d. As shown in FIG. 14, output signals S88 from the photo sensors 88a, 88b, 88c, 88d
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
The output signals S110a and S110c are output to the comparator 111a, and the output signals S110b and S110d are output from the comparator 111c.
b. In the comparator 111a, the output signal S
110a and S110c are compared to determine, for example, which of the photosensors 88a and 88c has detected the strong light, and the difference between the output values of the two photosensors is determined, and a signal indicating the result of the comparison is obtained. S111a is output to the determiner 112a. In the comparator 111b, the output signals S110b and S110d are compared with each other.
As in the case of a, the signal S111b indicating the comparison result is output from the decision unit 1
12b.

In the decision unit 112a, the signal S111a
, An azimuth drive signal S2a for driving the fine detection optical sensor unit 2 to rotate in the azimuth direction is generated such that the light shielding plate 70 faces the sun accurately.
a is output to the motor 10. In the determiner 112b, based on the signal S111b, an elevation drive signal S2b for driving the rotation of the fine detection optical sensor unit 2 in the elevation direction is generated so that the light shielding plate 70 accurately faces the sun. S2b is output to the motor 26. The above-described A / D converter 110, comparators 111a and 111b,
The processing in the determiners 112a and 112b is performed using, for example, a microcomputer.

The above-described processing is performed until the light shielding plate 70 correctly faces the sun, that is, the photo sensors 88a and 88
c, and until the values of the output signals from the photosensors 88b and 88d become equal. That is, at the time when the above-described processing is completed, the light-shielding plate 70 accurately faces the sun, and the control unit 125 calculates the position of the sun based on the attitude of the fine detection optical sensor unit 2 at this time. .

FIG. 15 shows a light shielding plate projected on the photosensors 88a, 88b, 88c and 88d of the fine detection optical sensor unit 2 according to the relationship between the position of the sun and the attitude of the fine detection optical sensor unit 2. It is a figure for explaining the shadow of 70. In the optical sensor unit 2 for fine detection, when the light shielding plate 70 is correctly pointing in the direction of the sun, the photo sensors 88a, 88b, 88
c, 88d, the light-shielding plate 7
A shadow with 0 is projected.

For example, FIGS. 15A and 15B
15C shows a case where the sun is shifted in the azimuth direction with respect to the light shielding plate 70, and FIGS.
This is the case where the sun is shifted in the elevation direction with respect to.

FIG. 15A is a diagram for explaining the shadow of the light-shielding plate 70 when the sun is closer to the photosensor 88a with respect to the light-shielding plate 70, and the photosensor 88c is included in the photosensor 88c. The area on which the shadow is projected is larger than that of. In this case, the output value from the photo sensor 88a is larger than the output value of the photo sensor 88c, with a magnitude corresponding to the degree of deviation in the azimuth direction of the sun. FIG. 15B is a diagram for explaining the shadow of the light-shielding plate 70 when the sun is closer to the photosensor 88 c than the light-shielding plate 70.
In a, the area on which a shadow is projected is larger than that of the photosensor 88c.

FIG. 15C is a view for explaining the shadow of the light-shielding plate 70 when the sun is closer to the photosensor 88d with respect to the light-shielding plate 70, and the photosensor 88d is included in the photosensor 88b. The area on which the shadow is projected is larger than that of. In this case, the output value from the photo sensor 88d is larger than the output value of the photo sensor 88b, with a magnitude corresponding to the degree of deviation of the sun in the elevation direction. FIG. 15D is a diagram for explaining the shadow of the light-shielding plate 70 when the sun is closer to the photosensor 88 b than the light-shielding plate 70.
The area where the shadow is projected is larger in d than in the photosensor 88b.

According to the optical sensor unit 2 for fine detection, even when the sun and the light shielding plate 70 are slightly displaced from each other, the difference between the output values from the photosensors provided at the opposed positions is the same as the conventional one. As compared with the case, the position of the sun can be detected with high accuracy.

The operation of the sun position detecting device 1 will be briefly described below. FIG. 16 shows a solar position detecting device 1
5 is a flowchart of the process in. Step S1: The shutter opening / closing position is determined by a user operation. Step S2: The direction of the sun is roughly detected by the coarse detection optical sensor unit 4, and the azimuth drive signal S4a and the elevation drive signal S4b according to the detection result (see FIG. 11).
Is output to the azimuth direction rotation drive unit 8 and the elevation direction rotation drive unit 6, and the fine detection optical sensor unit 2 rotates in the direction of the sun.

Step S3: The azimuth direction and the elevation angle direction of the sun are detected with high accuracy by the fine detection optical sensor unit 2, and the azimuth drive signal S2a and the elevation drive signal S2b (see FIG. 14) corresponding to the detection result are obtained. The fine detection light sensor unit 2 is further output to the directional rotation drive unit 8 and the elevation direction rotation drive unit 6, and further rotates in the azimuth direction and the elevation direction. This process is performed until the light shielding plate 70 correctly faces the sun, and the signal S8 indicating the rotational position in the azimuth direction from the azimuth rotation drive unit 8 and the signal S6 indicating the rotation position in the elevation direction from the elevation rotation drive unit 6. Is output to the control unit 125.

Step S4: When the above processing is completed, the control unit 125 calculates the position of the sun based on the signals S8 and S6 input from the azimuth direction rotation drive unit 8 and the elevation direction rotation drive unit 6.

Step S5: Based on the position of the sun calculated in step S4, the control unit 125 determines whether or not it is necessary to open and close the shutter based on the data input in advance. An opening / closing instruction signal S125 is output to the shutter opening / closing operation driving section 5. Upon input of the open / close instruction signal S125, the shutter 1 closing operation driving unit 5 drives the shutter to open or close based on the signal S125.

Second Embodiment Hereinafter, a sunlight lighting device using a photodetector according to a second embodiment of the present invention will be described. FIG. 17 is a diagram for explaining the configuration of the front side of the sunlight collecting device 201,
FIG. 18 is a diagram for explaining the configuration on the side surface side of the sunlight collecting device 201, and FIG. 19 is a diagram for explaining the configuration on the flat surface side of the sunlight lighting device 201. FIG.
19 is mounted on, for example, the roof of a general house, controls the azimuth and elevation of the reflecting mirror by detecting sunlight, reflects the sunlight with the reflecting mirror, and indoors. Irradiation.

As shown in FIGS. 17 to 19, the sunlight collecting device 201 is provided with an azimuth rotation drive unit 210 on the upper part of an L-shaped support base 202, and is rotated by the azimuth rotation drive unit 210. The mirror gripper 208 is attached to the rotating shaft 209 which is
7 and a disc-shaped reflecting mirror 2 via the bearing 206
Numeral 04 is attached to the mirror holding portion 208 via the mirror receiving plate 220 so as to be rotatable in the elevation direction. A hollow 220a is formed in the mirror receiving plate 220,
The fine detection sensor 302 having a sectional structure as shown in FIG. 20 is fixed to the hollow 220a.

The sunlight collecting device 201 has a case 203 so as to cover the reflection mirror 204, the mirror holding portion 208, the elevation rotation driving portion 207 and the bearing portion 206.
Is provided, and the case 203 is fixed to the support base 202 via a case grip 205. Further, the support table 20
2 is fixed to a support 290 provided on the roof of a general house, for example, with a fastener 291.

The sunlight collecting apparatus 201 roughly detects the position of the sun using the coarse detection sensor unit 4 described with reference to FIGS.
Move 04. Then, the direction in which sunlight is incident is detected using the mirror detecting sensor unit 302 as a light detecting device, and based on the detection result, the azimuth direction rotation driving unit 210 is detected.
Further, the driving of the elevation direction rotation drive unit 207 is controlled so that the sun faces each other, and the azimuth angle data and the elevation angle data of the sun position detecting device 1 and the sun lighting device 201 shown in FIG.

The sunlight is reflected by the reflection mirror 204 and the window 2
12 to irradiate the room indoors. At this time, the rotation shaft 209 and the mirror gripper 208 rotate in the azimuth direction by the rotation drive of the azimuth rotation drive unit 210, and the elevation rotation drive unit 207 and the bearing unit 206 interlock with this rotation.
At the same time, the mirror gripper 208 rotates in the azimuth direction. In addition, the reflection mirror 204 is rotated in the elevation direction by the rotation of the elevation rotation drive unit 207.

The sectional structure of the fine detection sensor unit 302 will be described. FIG. 20 is a cross-sectional view for explaining a cross-sectional structure of the fine detection sensor unit 302. Sensor unit 3 for fine detection
02 is the fine detection sensor unit 2 described with reference to FIG.
Has the same function as, but has a different mounting structure.
As shown in FIG. 20, the fine detection sensor unit 302 has a plate 234 fitted and fixed in a hollow part 220a formed in the mirror receiving plate 220. Reflection mirror 204
Is formed with a hole 204a, and a plate 232 made of plastic or the like is fitted into the hole 204a.
The plates 234, 233, 204, and 230 are fixed at four places by screws 231 so as to overlap each other.

Further, holes of a predetermined shape are formed in four places on the plates 230 and 232, and these holes are formed in FIGS.
0, the photo sensors 88a, 88b, 88
c and 88d are stored. Photo sensors 88a to 88
A plate 235 using an elastic member such as a sponge is provided between d and the plate 232.

The plate 160 is placed on the surface of the plate 230.
Is provided. The plate 160 has holes through which the support rods 86 pass, and photosensors 88a, 88b,
A hole 160a having a tapered surface for exposing 88c and 88d is provided. In this way, by forming the hole 160a using the tapered surface, external sunlight can be incident on the light receiving portions 88a1 and 88c1 from a wide range of directions,
The photosensors 88a to 88d can have a wide light receiving range.

A thread groove is formed at one end 86a of the support rod 86, and as shown in FIG.
Penetrates the plates 160, 230, 232 and is stopped by a nut 236 on the left side of the plate 232. A light-shielding plate 70 is fixed to the other end of the support rod 86 using a screw 166.

The mirror detecting sensor unit 302 shown in FIG.
Is easy to attach and detach to and from the mirror receiving plate 220 because of its configuration. Further, the photo sensors 88a to 88d are moved by the pressing force of the screw 231 to the plate 2 using a sponge or the like.
Since the photosensors 88a to 88d are pressed toward the plate 232 via 35, the positioning of the photosensors 88a to 88d can be performed with high accuracy.

[0066]

According to the photodetector of the present invention, it is possible to easily attach and detach the photodetector to and from a device such as a sun position detecting device or a sunlight collecting device. Further, according to the light detection device of the present invention, the light detection unit can be positioned with high accuracy, and as a result, the light receiving range can be determined with high accuracy.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a configuration on the front side of a sun position detection device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining a configuration on a side surface of the sun position detecting device shown in FIG. 1;

FIG. 3 is a diagram for explaining a configuration on a plane side of an elevation direction rotation drive unit of the sun position detection device shown in FIG. 1;

FIG. 4 is a view for explaining a configuration on a plane side of an azimuth direction rotation drive unit of the sun position detection device shown in FIG. 1 and an arrangement of a limit switch and a return switch.

FIG. 5 is a diagram for explaining a control system of the sun position detecting device shown in FIG.

FIG. 6 is a diagram for explaining a return switch and a limit switch.

FIG. 7 is a diagram for explaining a coarse detection sensor unit.

FIGS. 8A and 8B are views for explaining a fixture for the coarse detection sensor unit, wherein FIG. 8A is a plan view and FIG. 8B is a side view.

FIGS. 9A and 9B are diagrams for explaining a mounting tool of the optical sensor of the coarse detection sensor unit, where FIG. 9A is a front view, FIG. 9B is a diagram viewed from the direction of arrow B shown in FIG. (C) is a diagram viewed from the direction of arrow C shown in (A).

10A and 10B are configuration diagrams of the optical sensor 80a when the mounting tool shown in FIG. 9 is mounted on the mounting tool shown in FIG. 8, where FIG. 10A is a plan view and FIG. 10B is a side view.

FIG. 11 is a diagram for explaining processing of an output signal output from a photo sensor of the coarse detection optical sensor unit.

FIG. 12 is a diagram for explaining an optical sensor unit for fine detection.

FIG. 13 is a diagram illustrating a cross-sectional structure of a fine detection sensor unit.

FIG. 14 is a diagram for explaining processing of an output signal output from the photosensor of the fine detection optical sensor unit.

FIG. 15 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.

FIG. 16 is a flowchart of a process in the sun position detection device.

FIG. 17 is a view for explaining a configuration on the front side of a solar light collecting apparatus according to a second embodiment of the present invention.

FIG. 18 is a view for explaining a configuration of a side surface side of the sunlight collecting device shown in FIG. 17;

19 is a view for explaining the configuration on the plane side of the elevation rotation drive unit of the sunlight collecting device shown in FIG. 17;

20 is a cross-sectional view for explaining a cross-sectional structure of a sensor unit for fine detection mounted on the sunlight collecting device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sun position detection device 2 ... Fine detection sensor part 4 ... Coarse detection sensor part 5 ... Shutter opening / closing operation drive part 6 ... Elevation direction rotation drive part 8 ... Azimuth direction Rotation drive unit 9 Azimuth direction rotation area defining unit 13 Limit switch 15a, 15b Return switch 50 Projection 81a to 81c, 88a to 88d Photo sensor 130 Mounting Device 140: Mounting device 201: Sunlight collecting device 204: Reflecting mirror 220: Mirror receiving plate 220a: Cut-out portion 302: Mirror detection sensor portion

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁶ identification symbol FI G05D 3/12 G05D 3/12 HW 305 305E (58) Fields investigated (Int.Cl. ⁶ , DB name) G01C 1/00 -1/14 G02B 7/00-7/198

Claims (8)

(57) [Claims] A light detecting means for positioning one end of the light detecting means in a first direction;
Mounting means having a convex part, a second convex part mounted on the mounting means and positioning the other end corresponding to the detection side of the light detecting means in the first direction, and the first direction. And a guide part for positioning the light detecting means in a second direction orthogonal to the mounting direction. 2. The light detecting means has a substantially columnar shape having a predetermined flat surface, and when the mounting means is mounted on the mounting means, the light detecting means has a flat surface and a predetermined surface of the mounting means. The photodetector according to claim 1, wherein the photodetector is positioned by bonding. 3. The photodetector according to claim 2, wherein the flat surface is formed using an elastic member. 4. The positioning means is mounted by engaging an engaging portion provided on the mounting means with an engaged part provided on the mounting means, and mounting the mounting means on the mounting means. Item 4. The photodetector according to any one of Items 1 to 3. 5. The light according to claim 1, further comprising: a light detecting means, and a frame fixed at a predetermined position, and pressing and fixing the light detecting means from the front via an elastic member. Detection device. 6. The light detection means has a substantially cylindrical shape having a predetermined flat surface, and when fixed to the frame, positions the flat surface by bonding the predetermined surface to the predetermined surface of the frame. The photodetector according to claim 5, wherein: 7. A light-shielding portion, and a joint for supporting the light-shielding portion, wherein the light detecting means is configured such that when light is incident from substantially the front, a shadow of the light-shielding portion is partially applied to each region. Projected,
A pair of first light detectors for detecting an elevation direction in which light is incident, and when the light is incident substantially from the front, a shadow by the light shielding unit is projected onto a partial area, and light is incident. The frame comprises a pair of second light detection units for detecting an azimuth direction, and the frame fixes the joint and the first light detection unit.
The light detection device according to claim 5, wherein the light detection unit and the second light detection unit are pressed and fixed from the front via an elastic member. 8. A second frame having a tapered opening whose inner diameter increases toward the front side is provided on the front side of the frame, and wherein the first light detection section and the second light detection section are provided. Is the second
The photodetector according to claim 7, wherein the photodetector is exposed to the front side through an opening of the frame.