JPH0738894Y2 - Solar lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a solar lighting device.

(Prior Art) As a simple sunlight collecting device, one having a plurality of azimuth sensors arranged and fixed around a reflecting mirror and a sun sensor rotating with the reflecting mirror is known. For example, the fifth,
As shown in FIGS. 6, 7 and 8, the conventional solar light collecting device includes a reflecting mirror 102 as a light collecting member in a transparent dome 101, which comprises a base plate 103 and a supporting column 104 standing thereon. Then
Attach the azimuth motor block 105 to the upper end of the column 104,
The azimuth motor block 105 is projected below the rotary shaft 106 so as to hang down, a forked rod 107 is attached to the lower end of the rotary shaft 106, and the lighting member 102 is supported by a rotary shaft 108 disposed between the forked rods 107 so that the elevation angle can be changed. I am letting you. 109 is an elevation motor block attached to one lower end of the forked rod 107, and 110 is a forked rod 1
The sun sensor attached to the other lower end of 07, 111 is a circuit block.

Then, the orientation sensor 112 formed by inserting the optical fiber cable 113 as the light receiving element into an aluminum tube or the like.
Are arranged under the motor block 105 in a radial pattern, and five azimuth sensors 112a to 11 are arranged at 50-degree intervals centering on the azimuth sensor 112c protruding in the true south direction.
Each of 2e has a fixed elevation angle θ that is determined.

In the lighting method with the above configuration, first, a plurality of direction sensors 11
When each of 2a to 112e receives light, the presence or absence of direct light is determined by the difference in the amount of light. Then, when there is direct light, the daylighting member 102 is rotationally moved to the position of the direction sensor that detects the maximum light amount. As a result, the primary adjustment of the azimuth angle (so-called coarse adjustment) is performed. Next, the lighting member 102 is rotated downward from the previous vertical position until sunlight enters the sun sensor 110. The sun sensor 110 is a sensor that detects azimuth and elevation with high accuracy. When the sensor 110 detects direct light, fine adjustment of azimuth and elevation is performed by rotating the rotary shafts 106 and 108. .

The azimuth angle and the altitude angle of the azimuth sensor of such a sunlight collecting device are determined on the basis of the azimuth angle and the altitude angle in the area where the device is installed, the summer solstice, the winter solstice, the sunrise and the sunset. For example, the azimuth angle of the summer solstice in the Kanto region is approximately ± 12 centered on the true south.
0 °, that of the winter solstice is about ± 60 °, the altitude angle in the south of the summer solstice is about 80 °, that of the winter solstice is about 30 °,
The altitude difference is about 50 °. The altitude angle at sunrise and sunset of the winter solstice is 0 °, and that at the summer solstice is about 70 °, and the difference in altitude angle is about 70 °.

Therefore, it is sufficient to dispose a plurality of orientation sensors within a certain range (for example, within ± 120 ° in the Kanto region) centered on the center of the south, and not at other locations. It makes sense. On the other hand, the altitude angle of the sun changes during the day (daytime), so that the altitude angle of each azimuth sensor is set to the middle of the altitude angle of the sun at each azimuth angle of the summer solstice and winter solstice.

When an optical fiber is used for the azimuth sensor, the light receiving area 2α shown in FIG. 8 needs to cover the altitude angle between the sunrise of the winter solstice and the summer solstice of the day when the difference in altitude angle is maximum. It will be ± 35 ° or more.

(Problems to be Solved by the Invention) As described above, the altitude angle of the azimuth sensor using the optical fiber is set to the altitude angle of each azimuth sensor intermediate between the azimuth angles of the summer solstice and winter solstice. Therefore, it is necessary to select a material having a wide light receiving range. In addition, the light-receiving surface may become dirty due to long-term use, or a slight installation error may cause the light-receiving range to be narrowed or deviated, so that it may not be possible to receive light at sunrise or sunset in the winter solstice.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a direction sensor that uses an optical fiber that controls the rotation of a daylighting member such as a reflecting mirror and a condenser lens, and changes the direction and elevation angle of the daylighting member. In a sunlight collecting device including a sun sensor for controlling, a timer, a motor rotating in response to a control signal from the timer, and a sensor capable of rotating an azimuth sensor only in an elevation direction in accordance with the rotation of the motor. And a drive unit.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS.

Reference numerals 2a to 2f are azimuth sensor driving units according to the present invention, which are arranged on the base 4. The azimuth sensor drive unit 2 includes a sensor 8 in which an optical fiber is inserted and fixed in a cylinder such as an aluminum pipe, a sensor mounting base 6 in which the sensor 8 is fixed, a rotary shaft 10 provided on both sides of the sensor mounting base 6, and the rotary shaft. A column 12 rotatably supporting the worm 10, a worm wheel 14 fixed to one of the rotary shafts 10, a worm gear 16 for transmitting the rotation of a motor described later to the worm wheel 14, and a worm coupling gear fixed to the worm gear 16. It is composed of 18.
A light receiving surface 9 is extended on one side of the sensor 8 and a flexible fiber cable 11 is extended on the other side of the sensor 8 to transmit the amount of light incident from the light receiving surface 9 to a predetermined control circuit.

A motor 20 is fixed to the upper plate 22, and a gear 26 is attached to the output shaft 24. The motor 20 has a timer 21.
Based on a control signal from the output shaft 24,
It is transmitted to the gear 26, the worm connecting gear 18, the worm gear 16, and the worm wheel 14 to set the altitude angle of the sensor 8. Therefore, in the case of the present embodiment, if the configurations of the transmission mechanisms are the same, the amount of change in the altitude angle of the sensor due to the rotation of the motor 20 becomes equal. The altitude angle of the sensor 8 is controlled by a timer. For example, on the basis of spring equinox day and autumn equinox day,
Spring equinox day (or autumn equinox day) from spring equinox day to autumn equinox day
Set to an altitude angle near the middle of the altitude angle of
From the autumn equinox day to the spring equinox day, it may be set to an altitude angle near the middle of the altitude angle of the winter solstice and the altitude angle of the spring equinox day (or the autumn equinox day).

Further, in the present embodiment, since the center of the azimuth sensor drive units 2c and 2d is set to true south and the interval between the sensors 8 is set to 40 °, in the case of the Kanto region, the azimuth sensor drive units 2a and 2f are The altitude angle may be fixed near the middle of the altitude angle of the day (or the autumnal equinox day) and the altitude angle of the summer solstice, and only the other azimuth sensor driving units 2b to 2e may be controlled by the timer as described above.

(Effect of the Invention) According to the present invention, the azimuth sensor includes a timer, a motor that rotates in response to a control signal from the timer, and a sensor driving unit that can rotate only in an elevation angle direction as the motor rotates. Since the optical fiber material is configured so as to have a wider range of selection of the optical fiber material, finely controlling the altitude angle eliminates the possibility that light cannot be received.

[Brief description of drawings]

FIG. 1 is a plan view of an orientation sensor mounting portion according to the present invention. FIG. 2 is an explanatory view of a sensor driving unit according to the present invention. FIG. 3 is a diagram showing the relationship between the sensor and the sensor mount according to the present invention, in which (a) is a plan view and (b) is a front view. FIG. 4 is a block diagram for explaining the operation of the sensor driving unit according to the present invention. FIG. 5 is an explanatory diagram of a conventional sunlight collecting device. FIG. 6 is a plan view showing an arrangement example of a conventional direction sensor. FIG. 7 is a front view showing an arrangement example of a conventional direction sensor. FIG. 8 is a sectional view showing a structural example of a conventional orientation sensor. Sensor drive unit …… 2, sensor …… 8 Timer …… 21, motor …… 26

Claims (2)

[Scope of utility model registration request] 1. A solar light collecting device comprising a direction sensor using an optical fiber for controlling rotation of a daylighting member such as a reflecting mirror and a condenser lens, and a sun sensor for controlling change in direction and elevation of the daylighting member. A sunlight collecting device comprising: a timer; a motor that rotates in response to a control signal from the timer; and a sensor drive unit that can rotate the azimuth sensor only in the elevation direction in accordance with the rotation of the motor. . 2. The solar lighting device according to claim 1 of the utility model registration, characterized in that only an azimuth sensor arranged within an azimuth angle of sunrise or sunset in the winter solstice can rotate in the elevation angle direction. A solar lighting device.