KR20100097478A - Apparatus and method for illuminating sunbeams - Google Patents

Abstract

PURPOSE: A sunlight dimmer and a sunlight dimming method thereof are provided to continuously supply sunlight to a sunlight dimmer by changing the position of a reflector according to the movement of the sun. CONSTITUTION: A reflector(110) reflects sunlight. A driving part comprises a first and a second drive motor. The first drive motor rotates the reflector around a horizontal axis. A second drive motor rotates the reflector around a vertical axis. A light direction detection part(220) senses the direction of the sunlight which is reflected from the reflector. A light sensor(210) senses the optical quantity of the sunlight. When the optical quantity of the sunlight is greater than a required amount, a driving control part drives the driving part in order to control the direction of the reflected light.

Description

Solar lighting device and solar lighting method {APPARATUS AND METHOD FOR ILLUMINATING SUNBEAMS}

The present invention relates to a solar light control device and a solar light control method for continuously supplying sunlight to a constant light control unit, and in particular, the attitude of the reflector changes according to the diurnal motion of the sun to continuously supply the light to the light control unit during the day. It is about a device.

Solar energy is the energy produced by the fusion energy of hydrogen and is the source of life energy on earth. Solar energy reaches the earth in the form of sunlight and radiant heat, and it is an almost infinite energy source that can be supplied continuously as long as the sun exists.

Solar energy can be used as electrical energy through solar cells, and heat energy can also be used to drive solar boilers. In particular, the sun's light energy has light of various wavelengths, and it also functions as a catalyst for synthesizing nutrients necessary for living things. In addition, solar energy is an infinite resource that does not generate pollution and needs to be actively utilized.

There is a need for dimming technology for supplying sunlight in various fields such as energy, landscape, construction, etc., and a device for supplying sunlight to places where sunlight is difficult to reach due to the shadows formed by indoors or structures. . However, since the sun moves around the celestial sphere every day due to the rotation of the earth, the sun changes its orientation and altitude with time, so that the position of the reflector is controlled according to the position of the sun in order to continuously irradiate the sunlight at a certain position. This is necessary.

1 conceptually illustrates a solar light control apparatus method according to the prior art.

In order to continuously irradiate the sunlight toward a constant dimming target, the reflector 10 must move by half (θ4) of the sun's moving angle [theta] 3 while the sun moves around S1 to S2. That is, the sun and the dimming target portion should be positioned at the same angle with respect to the normal lines N1 and N2 of the reflecting plate.

Therefore, conventionally, in the case of a solar light dimming device that measures the movement angle of the sun and controls the attitude of the reflector, when there is a measurement error of the movement angle of the sun, it is difficult to accurately illuminate the light dimming target portion. In addition, since only the posture of the reflector is controlled, there is a problem in that it is impossible to confirm whether sunlight is actually illuminated on the dimming target portion.

In addition, the amount of sunlight should be sufficient to determine the angle of movement by measuring the azimuth and altitude of the sun, but the appearance of the sun may not be constant depending on the weather conditions. It may malfunction and may go down. In addition, in order to reset the device in order to illuminate the sunlight at a certain position after the malfunction of the device, it is necessary to scan the dimming direction of the sunlight. There is a problem that this takes.

The present invention is to solve the above-mentioned problems, not to measure the angle of movement of the sun or to control the reflector according to the angle of movement of the sun, to check whether the sun is being directed toward the target of the light control, the reflected light of sunlight By directly controlling the attitude of the reflector to face the dimming target, errors in the dimming direction can be reduced, and the scanning interval is determined according to the time and date, so that even if it is reset, the scanning time is very short. The purpose is to provide value.

In order to achieve the above object, the present invention provides a light reflecting plate for reflecting sunlight, a driver for rotating the reflecting plate about two axes, and light for checking whether the reflected light of the sun reflected by the reflecting plate is directed to a target point. The reflected light is directed to the target point according to the direction of the reflected light which is detected by the direction detecting unit, the light quantity detecting unit detecting the amount of sunlight, and the amount of light detected by the light quantity detecting unit is more than the required amount of light. It provides a solar light control device including a drive control unit for controlling the drive unit to.

The driving unit may include a first driving motor for rotating the reflector with respect to a horizontal axis, and a second driving motor for rotating the reflector with respect to a vertical axis, wherein the light direction sensing unit is fixed between the reflector and the target point. It is preferable to be.

The light direction detecting unit is based on the intersection of the horizontal axis and the axis orthogonal to the horizontal axis on a plane orthogonal to the axis connecting the center of the reflecting plate and the center of the target point with the housing having one surface open toward the reflecting plate side. At least one scanning sensor disposed in the quadrant facing each other and an optical sensor provided inside the housing, and a micro sensing sensor provided inside the housing to sense a direction of the reflected light reflected from the reflecting plate, wherein the driving control unit When no light is detected in both of the scanning sensors, the first and second driving motors are driven so that light is sensed by both of the scanning sensors, and when the light is detected by both of the scanning sensors, the micro-sensing sensor detects the light. Scanning the first and second driving motors to the scanning point such that the reflected light is directed toward the target point; After all of the light is detected, and the drive, wherein the drive control member it is desirable to drive the first and the slower rate than before the light is detected in all of the scanning sensor to the second drive motor.

The micro-sensing sensor may include a shadow plate disposed on a plane orthogonal to an axis connecting the center of the reflection plate and the center of the target point, and the target spot side so that the orthographic projection of the shadow plate is projected and parallel to the shadow plate. The base plate may be disposed, and four shadow sensors may be disposed in contact with an orthogonal boundary line of the shadow plate on the base plate and provided on an axis perpendicular to a horizontal axis on the base plate and a horizontal axis on the base plate.

Preferably, the driving control unit drives the first or second driving motor to rotate the reflector in the direction of the sensor where the light is detected when there is a sensor in which the light is detected.

Preferably, the micro-sensing sensor further includes two support plates which are diagonally arranged to couple the base plate and the shadow plate to each other and partition the four shadow sensors from each other.

The apparatus may further include a clock connected to the driving controller, wherein the driving controller limits the scanning range of the second driving motor according to the time recognized by the clock, or the second driving motor according to the date and time recognized by the clock. It is desirable to limit the scanning range of.

The light direction detecting unit is preferably located at a distance 1.5 times the average width of the reflecting plate from the center of the reflecting plate.

The light amount detecting unit is preferably exposed in a direction toward the south middle altitude of the sun at the vernal equinox.

In another aspect, the present invention, in the solar light control method for adjusting the azimuth and altitude of the reflector plate to reflect the sunlight to the target point, by detecting the amount of light of the sunlight to continue to detect the amount of light is less than the reference light A first light quantity judging step; A scanning step in which the reflected light of the sunlight is reflected toward a target point by changing the azimuth and altitude of the normal of the reflecting plate when the amount of light of the sunlight determined in the first light determination step is higher than a reference light amount; The azimuth and altitude of the normal of the reflector are changed more slowly than the scanning step in the initial state after the scanning step and the reflected light of the sunlight is accurately irradiated to the target point, and then the coordinates of the sun are moved according to the diurnal motion of the sun. A fine adjustment step of maintaining the reflected light of the sunlight to be accurately incident on the target point; After the fine adjustment step, the light quantity of sunlight is detected and the second light quantity judgment is performed if the detected light amount is equal to or greater than the reference light amount, and if the light amount is less than the reference light amount, the second light quantity determination step is performed. It provides a photovoltaic lighting method comprising the step.

In the scanning step, the reflector is rotated by 15 degrees with respect to a horizontal axis and rotates about the vertical axis at a speed of 15 degrees per second to scan the direction of reflected light of the sunlight, and in the fine adjustment step, the reflector is configured to adjust the vertical axis or the horizontal axis. It is preferable to adjust the direction to which the reflected light of the sunlight is directed by rotating at a speed of 1 degree per second as a reference.

In the scanning step, it is preferable that the vertical rotation range of the reflective plate varies with time.

According to the present invention, when the amount of light is measured according to the weather, when the amount of light is insufficient, the operation of the device can be stopped to prevent malfunction of the device. In addition, when the amount of sunlight is recovered and the device needs to be operated again, the scanning range is narrowed down in consideration of the date or time, so that the scanning of the sunlight is performed quickly.

Hereinafter, the configuration of the solar light control apparatus according to the present invention with reference to FIGS. 2 to 5 in detail.

Figure 2 schematically shows an embodiment configuration of a solar light control device according to the present invention, Figure 3 shows a process of dimming the sunlight to the target point using the solar light control device according to the present invention.

In FIG. 3, the X axis and the Z axis are driving axes for rotating the reflector 110, and the Y axis is an axis connecting the center O 'of the reflector 110 and the center O ′ of the target point 1. The center O of the reflecting plate 110 is an intersection of the X-axis and the Z-axis, but the position does not change even when the reflecting plate 110 rotates about the X-axis or the Z-axis. The position of the reflecting plate is determined by the position of the normal of the reflecting plate, the normal of the reflecting plate can be represented by azimuth and elevation, the azimuth is represented by the rotation about the vertical axis, and the elevation is represented by the rotation about the horizontal axis. In the following description, the X axis (or X 'axis) is the horizontal axis, and the Z axis (or Z' axis) is the vertical axis.

As shown in FIG. 2 and FIG. 3, the solar light control apparatus according to the present invention reflects the sunlight 100 and the sunlight through the reflector 100 to target 1. It includes a control unit 200 for controlling the posture of the reflector 100 to supply to.

The reflector 100 includes a reflection plate 110, an X-axis driving motor 120 for rotating the attitude of the reflection plate 110 about the X axis, and a Z-axis driving for rotating the attitude of the reflection plate 110 about the Z axis. And a motor 130.

The controller 200 may include a light amount detector 210 for detecting a light amount of sunlight, a light direction detector 220 for detecting a direction of reflected light reflected by the reflector 110 of the reflector 100, The X-axis driving motor of the reflector 100 according to the clock 240, the amount of light detected by the light amount detector 210, the time recognized by the clock 240, and the direction of reflected light detected by the light direction sensor 220 ( 120 and a driving controller 230 for driving the Z-axis driving motor 130 to direct the reflected light reflected from the reflector 110 toward the target point 1.

Figure 4 shows an embodiment of the light amount sensor and the light direction sensor of the solar light control apparatus according to the present invention.

As shown in Figs. 3 and 4, in this embodiment, the light amount sensor 210 and the light direction sensor 220 are fixed together to the support 201.

The light amount detector 210 is fixed to the support 201 by the light amount detector bracket 203 and includes a light amount sensor 211 exposed in a direction generally toward the south side. The direction of the light amount sensor 211 is to prevent the shadow from occurring in the light amount sensor 211 while the sun is circling. It is preferable that the direction of the light amount sensor 211 varies depending on the date and the location, but it can be fixed so that the sun faces the southern position when the vernal equinox or the autumn equinox. For example, at the latitude 37 degrees, the mid-central altitude of the vernal equinox or the autumnal equinox is about 53 degrees, so the light quantity sensor may be installed in the direction toward 53 degrees southward.

In cloudy weather, when the amount of sunlight is less than a certain amount, it is difficult for the light direction sensor 220 to detect the direction of the reflected light reflected from the reflector 110. In this case, the drive control unit 230 may not normally control the X-axis drive motor 120 and the Z-axis drive motor 130 may cause an error in driving the drive motor. Accordingly, if the amount of light of sunlight is insufficient due to the cloudy weather or the late afternoon sun is tilted, the driving control unit 230 is X when the amount of light L1 sensed by the light amount sensor 211 of the light quantity detector 210 is less than a predetermined amount l1. The operation of the shaft and Z-axis driving motors 120 and 130 is stopped.

Figure 5 shows the shadow sensor arrangement inside the light direction sensor according to the present invention from the front. In FIG. 5, the Z 'axis is an axis parallel to the Z axis, and the X' axis is an axis orthogonal to the Z 'axis on a plane orthogonal to the Y axis.

4 and 5, the light direction sensor 220 is fixed to the support 201 by the light direction sensor bracket 202. The light direction sensor 220 is fixed between the reflector plate 110 and the target point 1. The light direction sensor 220 is a quadrant facing each other based on the intersection of the X 'and Z' axes on a plane including the housing 221 having one surface open toward the reflecting plate 110 and the X 'and Z' axes. Two first and second scanning sensors 222a and 222b disposed in the housing 221 and provided inside the housing 221, and a micro detection sensor 223 provided inside the housing 221 and finely detecting the direction of the reflected light. Equipped.

In this embodiment, the first and second scanning sensors 222a and 222b are disposed one by one in point symmetry in the opposing quadrant, but this is merely an example. Each of the first and second scanning sensors 222a and 222b senses the up and down based on the X 'axis and the left and right based on the Z' axis. It may be arranged to sense each. For example, each quadrant may be provided with a scanning sensor.

The micro sensor 223 is located in the housing 221 to finely sense the direction of the reflected light by excluding the interference effect of light. The shadow plate 2231 arranged on the reflection plate 110 side orthogonally to the Y axis, the base plate 2232 on which the orthographic projection of the shadow plate 2231 is projected, and arranged in parallel to the shadow plate 2231, and the shadow plate ( 2231 and 4 compartments separated by a diagonal support plate 2233 connecting the corners for joining the base plate 2232 and two support plates 2233a and 2233b installed and intersecting the base plate 2232. And four shadow sensors 2234a to 2234d, respectively. The two shadow sensors 2234a and 2234c are placed on the Z 'axis and the other two shadow sensors 2234b and 2234d are placed on the X' axis. In addition, each of the shadow sensors 2234a to 2234b is preferably located in contact with the inside of the boundary of the vertical orthogonal projection of the shadow plate 2231 formed on the base plate 2232. The diagonally arranged support plate 2333 prevents light incident on one of the diagonally divided sections from being reflected, scattered, diffracted, and irradiated to the other compartments, so that shadow sensors of each compartment are incident on their own compartments. Only light will be detected.

When the light quantity detector 210 detects a predetermined amount or more of light and determines that the weather is clear, the driving controller 230 controls the reflector 110 to light amount L2 of the reflected light detected by the first and second scanning sensors 222a and 222b. Scan rapidly while rotating about the X-axis or Z-axis at an angular velocity of, for example, 15 degrees per second. When the reflected light is sensed by both the first and second scanning sensors 222a and 222b, the driving controller 230 may control the amount of light L3 detected by each of the shadow sensors 2234a to 2234d of the fine detection sensor 223 to be a predetermined amount ( The reflector 110 is rotated slowly, for example at an angular velocity of 1 degree per second, until l3). That is, when light is not detected by all of the four shadow sensors 2234a to 2234b by the shadow of the shadow plate 2231, the reflected light reflected from the reflector 110 is incident orthogonally to the shadow plate. It is in the state of investigating precisely toward 1). When the direction of the reflected light changes according to the circumference of the sun, the reflected light is detected by one or two of the shadow sensors 2234a to 2234b, and the driving controller 230 drives the X-axis or Z-axis driving motor to reflect the plate 110. By changing the posture of all the shadow sensors (2234a to 2234b) to be in a state where no light is detected.

A process of controlling the posture of the reflector 110 will be described in detail. The reflection plate 110 rotates in the direction in which the light is detected among the shadow sensors 2234a to 2234b, thereby causing a shadow to the light sensor 2234a to 2234b.

For example, when light is detected by the upper shadow sensor (hereinafter, the first shadow sensor) 2234a among the shadow sensors on the Z 'axis in FIG. 5, the driving controller 230 may move the reflector 110 around the X axis. It rotates clockwise to move the direction of the reflected light upwards so that light is not detected by the first shadow sensor 2234a. In addition, when light is detected by the left shadow sensor (hereinafter, the second shadow sensor) 2234b among the shadow sensors on the X 'axis, the driving controller 230 rotates the reflector 110 in the counterclockwise direction about the Z axis. By moving the direction of the reflected light to the left side so that the light is not detected by the second shadow sensor (2234b). In addition, when light is detected by the lower shadow sensor (hereinafter, the third shadow sensor) 2234c among the shadow sensors on the Z 'axis, the driving controller 230 rotates the reflector 110 in a counterclockwise direction about the X axis. By moving the direction of the reflected light downward so that the light is not detected by the third shadow sensor (2234c). In addition, when light is detected by the right shadow sensor (hereinafter, the fourth shadow sensor) 2234d among the shadow sensors on the X 'axis, the driving controller 230 rotates the reflector 110 clockwise about the Z axis. The direction of the reflected light is moved to the right so that light is not detected by the fourth shadow sensor 2234d.

The intersection of the X 'axis and the Z' axis is preferably located on the Y axis, and the light direction sensor 220 is located at a distance 1.5 times the average width of the reflecting plate 110 from the center O of the reflecting plate 110. desirable.

Figure 6 illustrates the Z-axis reference position of the reflector for scanning of the solar light dimming device according to the present invention. Rotate the reflector about the Z axis to scan the azimuth of the sun. The driving controller 230 may reduce the scanning time by varying the Z-axis rotation range according to the time recognized by the clock 240. Since the position of the sun varies according to the date and time, it is preferable to change the Z-axis rotation range according to the date and time according to the position of the reflector 110 according to this embodiment. Assuming that the sun is circulating at 12:30, and the sun moves to emotion at 18:30, the scanning range is limited at intervals of 4 hours, and scans with margins of 10 degrees. That is, the actual azimuth movement of the sun for 4 hours is 60 degrees, but by scanning the 80 degree range can cover the error due to the change in the azimuth angle of the sun according to the date.

The center O of the reflecting plate 110 is the center of the azimuth coordinate of FIG. 6. θ1 is the azimuth angle based on the normal direction of the normal of the reflecting plate 110 for sending the sunlight to the target point 1 when the sun is in the orthogonal center, and is the center O ′ of the target point 1. And the line connecting the center (O) of the reflector 110 and the east-west axis is an intermediate position of the angle formed. θ2 is the azimuth angle of the normal of the reflecting plate 110 to direct sunlight to the target point 1 in the case of the sun, the center (O ') of the target point 1 and the reflecting plate 110 It is the middle position of the angle between the line connecting the center (O) and the north-south axis. θ3 is the azimuth angle of the normal of the reflecting plate 110 for the reflector 110 to send sunlight to the target point 1 when the sun is located in the emotion, the center O 'of the target point 1 and the reflecting plate 110 It is the middle position of the angle formed by the line connecting the center of (O) and the east-west axis.

Below, in the azimuth coordinate of Fig. 6, the forward direction is the origin of the Z-axis drive and the clockwise direction is the positive angle. From 6:30 to 10:30 (from 0 to 10:30, including the time before sunrise), 70 degrees clockwise from θ1 at 10 degrees counterclockwise (θ1-10) at θ1 (θ1-10) +70) is the Z-axis scanning range, and from 10:30 to 14:30, 40 degrees (θ2 ± 40) in the counterclockwise and clockwise directions at θ2, respectively, is the Z-axis scanning range, and 14:30 Minutes to 18:30 (18:30 to 24 hours, including after sunset) 10 degrees (θ3 + 10) clockwise at θ3 at 70 degrees (θ3-70) counterclockwise at θ3 Position is the Z-axis scanning range.

7 is a side view illustrating a process of rotating the reflector for scanning of the solar light control apparatus according to the present invention about the X axis. Scanning is performed by rotating the X axis about 15 times after the Z-axis scanning once and then Z-axis scanning.

A process of allowing light to be sensed by the first and second scanning sensors 222a and 222b is as follows. When light is sensed by the light quantity detecting sensor 211, the driving controller 230 starts a scanning process. Since the second scanning sensor 222a and the second scanning sensor 222b located in the fourth quadrant of FIG. 5 are different from each other in the upper and lower positions and the left and right positions thereof, the first and second scanning sensors 222a, In the case where light is sensed in all of 222b), almost no shadow of the housing 221 is generated, and the direction of the reflected light is generally directed toward the target point 1.

When the direction of the reflected light reflected by the reflector 110 does not substantially match the direction toward the target point 1, light is not detected by the first and second scanning sensors 222a and 222b by the shadow of the housing 221. Do not. The driving controller 230 drives the Z-axis driving motor 130 to check whether light is sensed by both the first and second scanning sensors 222a and 222b while rotating the reflector 110 by a predetermined range. If the directions of the reflected light do not coincide with each other, even if the reflector 110 is rotated in the full range around the Z axis, light may be detected by both of the first and second scanning sensors 222a and 222b even though light may be detected. It doesn't work. Therefore, if light is not sensed by both the first and second scanning sensors 222a and 222b while rotating the reflector 110 around the Z axis, the light is rotated 15 degrees around the X axis and then rotated about the Z axis. While repeating this process, scanning is terminated at a position where light is sensed by both the first and second scanning sensors 222a and 222b, and the direction of the reflector 110 is precisely adjusted by using the micro sensor 223.

8 shows the operation of the solar light control apparatus according to the present invention. As shown in FIG. 8, the light amount sensor 211 detects the light amount (S10). After the cloud is rolled up in the sunrise or cloudy weather to determine whether the amount of light above a certain amount reaches the light sensor (S20) when the clear reference light amount (l1) is less than the solar light control device does not operate the light sensor 211 continues to detect the light To repeat.

When the light of the clear reference light amount l1 or more is irradiated to the light amount sensor 211, the time is determined by the clock 240 (S30). If the time is from 0 o'clock to 10:30, the Z-axis is based on the intermediate position of the line connecting the east-west axis, the center of the reflector 110 and the center of the target 1 with the X axis every 15 degrees. The reflector 110 rotates at a speed of 15 degrees per second from 10 degrees counterclockwise to 70 degrees clockwise (S41). If the time is from 10:30 to 14:30, the Z-axis is located at the middle of the line connecting the north-south axis, the center of the reflector 110, the center (O), and the center of the target (1), every 15 degrees. As a reference, the reflector 110 rotates at a speed of 15 degrees per second from 40 degrees counterclockwise to 40 degrees clockwise (S42). If the time is earlier than 14:30 to 24 hours, the Z-axis is based on the middle position of the line connecting the east-west axis with the center (O) of the reflector 110 and the center (O ') of the target (1) every 15 degrees. The reflector 110 is rotated at a speed of 15 degrees per second from 70 degrees counterclockwise to 10 degrees clockwise (S43). Whether the light amount L2 detected by the first scanning sensor 222a and the light amount L3 detected by the second scanning sensor 222b among the reflector rotations S41, S42, and S43 exceed the scanning reference light amount l2. It judges (S51, S52, S53).

When the light amounts L2 and L3 detected by the first scanning sensor 222a and the second scanning sensor 222b both exceed the scanning reference light amount l2, the reflector 110 stops rotating and the first shadow detection sensor 2234a. In the light amount l4 and the second shadow sensor 2234b detected by the light amount l5 and the light amount l6 and the fourth shadow sensor 2234d detected by the third shadow sensor 2234c It is determined whether all of the detected light amount l7 is less than the shadow reference light amount l3 (S60). The reflection plate 110 rotates at a speed of 1 degree per second toward the shadow sensor in which the amount of light equal to or greater than the shadow reference light amount l3 is detected among the first to fourth shadow detection sensors 2234a, 2234b, 2234c, and 2234d (S70). When the light amount less than the shadow reference light amount l3 is sensed by all of the first to fourth shadow detection sensors 2234a, 2234b, 2234c, and 2234d, the direction of the reflected light of the sunlight by the reflector 110 is directed to the target point 1. It's exactly heading.

Thereafter, when the sun is blocked by the clouds or the sun goes down, it is necessary to stop the operation of the solar light control device because the amount of light is insufficient. Therefore, it is determined whether the light amount L1 of the light amount sensor 211 is equal to or greater than the clear reference light amount l1 (S80). When the light amount L1 of the light amount sensor 211 is equal to or greater than the clear reference light amount l1, the first and fourth shadow detection sensors 2234a, 2234b, 2234c, and 2234d detect light amounts smaller than the shadow reference light amount l3. The process returns to step S60 to determine whether the light amount L1 of the light amount sensor 211 is less than the clear reference light amount l1, and returns to the light amount detection step S10.

In the above-described embodiment, the clear reference light amount l1 in the light amount sensor 211 is 20000 lx. That is, when the light amount sensor 211 detects light of 20000 lx or more, the solar light control device operates. The scanning reference light amount l2 is 0.9 times the value obtained by multiplying the reflectance of the reflector 110 by the amount of light detected by the light amount sensor 211. That is, when 20000 lx light is detected by the light amount sensor 211, when the reflectance of the reflector is 90%, the scanning reference light amount is 16200 lx and light having a brightness higher than or equal to that detected by the first and second scanning sensors 222a and 222b. Until scanning. The shadow reference light amount l3 of the shadow sensors 2234a to 2234b of the fine detection sensor 223 is 50% of the scanning reference light amount. That is, when the amount of light detected by the shadow sensors 2234a to 2234b is less than or equal to 8100 lx, the shadow sensors 2234a to 2234b may be recognized by the shadow plate 2231. The above-described reference light quantity values l1, l2, and l3 are exemplary and not limited thereto, and may be set to specific values independently of each other.

In addition, in the accompanying drawings, the X-axis and X'-axis are shown as the horizontal axis, the Z-axis and Z 'axis is shown as the vertical axis. Therefore, if the X and X 'axes are parallel and the Z and Z' axes are parallel, but the target point and the reflector are not located on the horizontal plane, the X and X 'axes are horizontal, the Z axis is vertical, and the Z' axis is the reflector. It may be an axis orthogonal to the horizontal axis X 'on a plane orthogonal to the axis connecting the center and the center of the target point.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the spirit of the present invention. It will be apparent to those who have knowledge.

1 is a conceptual diagram showing a method of a solar light control apparatus according to the prior art,

Figure 2 is a block diagram schematically showing the configuration of an embodiment of a solar light control apparatus according to the present invention,

3 is a conceptual diagram illustrating a process of dimming sunlight to a target point using a solar light control device according to the present invention;

4 is a perspective view showing an embodiment of a light amount sensor and a light direction sensor of a solar light control apparatus according to the present invention;

5 is a front view showing the arrangement of the scanning sensor and the shadow sensor of the light direction sensor of FIG.

6 is a conceptual diagram illustrating a Z-axis reference position of a reflector for scanning a solar light dimming device according to the present invention;

FIG. 7 is a side view illustrating a process of rotating a reflector for scanning of a solar light control apparatus according to the present invention about an X axis; and

8 is a flow chart showing the operation of the solar light control apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: reflector 120: first drive motor

130: second drive motor 210: light amount sensor

220: light direction sensor 221: housing

222a, 222b: scanning sensor 223: fine detection sensor

2231: shadow plate 2232: base plate

2233: support plate 2234a to 2234d: shadow sensor

230: drive control unit 240: clock

Claims (14)

Reflector reflecting sunlight, A drive unit for rotating the reflector about two axes; A light direction detecting unit for checking whether the reflected light of the sunlight reflected by the reflector is directed to a target point; Light amount sensing unit for detecting the amount of sunlight, A driving control unit driving the driving unit to control the reflected light toward the target point according to the direction of the reflected light confirmed by the light direction detecting unit when the amount of light detected by the light quantity detecting unit is equal to or greater than the required light amount; Photovoltaic light control device comprising a. The method of claim 1, The driving unit includes: A first driving motor for rotating the reflector about a horizontal axis; A second driving motor for rotating the reflector about a vertical axis Photovoltaic light control device comprising a. The method according to claim 1 or 2, The light direction detecting unit is fixed between the reflecting plate and the target point Solar lighting equipment. The method of claim 3, The light direction detecting unit, At least in a quadrant facing each other on the basis of the intersection of the horizontal axis and the axis orthogonal to the horizontal axis on a plane orthogonal to the axis connecting the center of the reflective plate and the center of the target point to the housing with one surface open toward the reflecting plate; A scanning sensor which is disposed one by one and is an optical sensor provided inside the housing, and a micro sensor which is provided inside the housing and senses the direction of the reflected light reflected from the reflecting plate, The driving control unit drives the first and second driving motors so that light is detected by both of the scanning sensors when no light is detected by both of the scanning sensors, and when the light is sensed by both of the scanning sensors, by the fine detection. The first and second driving motors are driven such that the direction of the reflected light detected by the sensor faces the target point, The driving control unit drives the first and second driving motors at a slower speed than after the light is sensed by both the scanning sensors and before the light is sensed by both the scanning sensors. Solar lighting equipment. The method of claim 4, wherein The micro sensor is, A shadow plate disposed perpendicular to an axis connecting the center of the reflector and the center of the target point; A base plate disposed on the target point side such that the orthographic projection of the shadow plate is projected and parallel to the shadow plate; Four shadow sensors disposed in contact with the orthogonal boundary line of the shadow plate on the base plate and provided on each of two horizontal axes on the base plate and an axis perpendicular to the horizontal axis on the base plate. Photovoltaic light control device comprising a. The method of claim 5, The driving controller is configured to drive the first or second driving motor to rotate the reflector toward the sensor where the light is detected when there is a light sensor among the shadow sensors of the micro sensor. Solar lighting equipment. The method of claim 5, The micro sensor is Two support plates disposed diagonally to couple the base plate and the shadow plate to each other and partition the four shadow sensors from each other. Solar lighting device further comprising. The method of claim 2, Further comprising a clock connected to the drive control unit, The driving control unit limits the scanning range of the second driving motor according to the time recognized by the clock. Solar lighting equipment. The method of claim 8, The driving control unit limits the scanning range of the second driving motor according to the date and time recognized by the clock. Solar lighting equipment. The method of claim 1, The light direction detecting unit is located at a distance 1.5 times the average width of the reflecting plate from the center of the reflecting plate Solar lighting equipment. The method of claim 1, The light quantity detecting unit is exposed in the direction toward the south middle altitude of the sun at the vernal equinox Solar lighting equipment. In the solar light dimming method of reflecting the sunlight to the target point by adjusting the azimuth and altitude of the normal of the reflector, A first light quantity determining step of sensing light quantity of sunlight and continuously detecting light quantity when the detected quantity of sunlight light is less than a reference quantity; A scanning step of reflecting the reflected light of the sunlight toward a target point by changing the azimuth and altitude of the normal of the reflecting plate when the amount of light of the sunlight determined in the first light determination step is equal to or greater than a reference light amount; The azimuth and altitude of the normal of the reflector are changed more slowly than the scanning step in the initial state after the scanning step and the reflected light of the sunlight is accurately irradiated to the target point, and then the coordinates of the sun are moved according to the diurnal motion of the sun. A fine adjustment step of maintaining the reflected light of the sunlight to be accurately incident on the target point; And A second light quantity determining step of sensing the light amount of sunlight after the fine adjustment step and performing the fine adjustment step again if the detected light amount is equal to or greater than the reference light amount and performing the first light quantity determining step if the light amount is less than the reference light amount Solar lighting method comprising a. The method of claim 12, In the scanning step, the reflector is rotated by 15 degrees with respect to a horizontal axis and rotates about a vertical axis at a speed of 15 degrees per second to scan the direction of reflected light of the sunlight, In the fine adjustment step, the reflector is rotated at a speed of 1 degree per second based on the vertical axis or the horizontal axis to adjust the direction in which the reflected light of the sunlight is directed Solar lighting method. The method according to claim 12 or 13, In the scanning step, The reflector has a rotation range that changes with respect to the vertical axis over time. Solar lighting method.

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