JPS5813846B2 - solar collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sunlight collecting device that can efficiently collect sunlight by accurately tracking the movement of the sun.

Proposals have already been made to efficiently collect sunlight by making a solar collector automatically follow the movement of the sun.

However, conventional devices detect whether the solar collector is facing the sun or not, and then direct the solar collector toward the sun. It is not possible to detect how far the incident angle of the image is deviated, and as a result, the follow-up operation cannot be performed smoothly.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and in particular, detects the deviation of the angle of incidence of sunlight with respect to the sunlight collecting device, and detects the deviation of the incident angle of the sunlight into the solar collecting device based on the deviation. is moved in the direction of the sun, thereby facilitating the following operation of the solar light collecting device.

FIG. 1 is a schematic configuration diagram for explaining an embodiment of the sunlight collecting device according to the present invention. In the figure, 1 is a lens system for converging sunlight, and 2 is a lens system for converging sunlight. In the sunlight collection unit for collecting sunlight, the sunlight collected by the sunlight collection unit 2 is guided to a desired location through a light guide (not shown), where it is directly used as illumination light, or It is converted into electrical energy, thermal energy, etc. for use.

So is the sensor for detecting the total amount of sunlight, S1 is the sensor for detecting the amount of direct sunlight (or the sensor for detecting the amount of indirect sunlight), and S2 is the sensor for detecting the amount of indirect sunlight (or the sensor for detecting the amount of direct sunlight). When the focal length is f, the sensor S
1 and S2 are within the range of the focal length of the lens system 1 h (o≦
h≦f) and are arranged symmetrically so that one end touches the outer periphery of the light flux leading to the solar image formed by the lens system 1, and the other end is outside the light flux.

Here, the total amount of sunlight S (Lx) and the amount of direct sunlight D (L
x) and the amount of indirect sunlight I (Lx). There is a relationship between them, and the direct sunlight ratio is β
If (β=D/S), ? Become.

Here, the output signal related to the total sunlight amount S detected by the sensor So is L (mmV), and the output signal related to the direct sunlight amount D detected by the sensor S1 is L1 (
Let L2 (mmV) be the output signal related to the amount of indirect sunlight detected by the sensor S2, and let L2 (mmV) be the output signal related to the amount of indirect sunlight detected by the sensor S2, and the outer circumference of the luminous flux reaching the solar image formed by the lens system 1 of the sensor S, (or S2). As shown in FIG.
If α is the ratio of the position across 2) to the total length of the sensor, when α is within the range O < α < 1, direct sunlight coming through the lens system enters the α part of sensor S1, and 1
Since indirect sunlight enters the part -α and only indirect sunlight enters the sensor S2, we obtain .

Therefore, the angle of incidence of sunlight on the lens system 1 is O<α<
1, the incident angle of sunlight is uniquely determined by the output signals of the sensors so, s1 and tS2, as shown in equation (5), so the output signals of the sensors So to S2 are
) By calculating the equation, it is possible to detect how much the lens system 1 is deviated from the incident angle of sunlight, and therefore, the lens system can be rotated by the amount of the deviation angle. control, and overhunting can be effectively prevented.

In addition, when α>1, as is clear from Fig. 2, α
Since it is the same as in case 21, the control system is α=
1, and therefore, even if the angle of incidence of sunlight on the lens system 1 deviates by a considerable amount due to cloudy weather etc., it will quickly follow up to the position α21,
After that, when it enters the range of 0 to σ<1, it is driven by an amount commensurate with the amount of deflection.

As is clear from the above explanation, the detectable incident angle is determined by the lengths of the sensors S1 and S2. If it is extended to 180°, it is possible to detect an angle of declination of approximately 180°.In addition, a pair of sensors is arranged in the same way as sensors S1 and S2 on a line that is perpendicular to the line connecting sensors S1 and S2. It is also possible to detect the amount of deviation in a direction perpendicular to the direction.

Furthermore, it is also possible to configure the sensors S1 and S2 with a plurality of sensors, and it is also possible to configure the area from the sensor VSzS2 to the end of the re-lens system 1 with a plurality of lenses. be.

As is clear from the above description, according to the present invention, it is possible to detect the deviation of the angle of incidence of sunlight on the lens system 1, so the control system is driven by an amount commensurate with this deviation. Therefore, the following operation of the lens system can be performed smoothly.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram for explaining one embodiment of a sunlight collecting device according to the present invention, and FIG. 2 is an enlarged view of a sensor S1 portion shown in FIG. 1. 1... Lens system for sunlight convergence, 2...
Solar collector, so, s1 ts2...
sensor.

Claims (1)

[Claims] 1. A lens system for converging sunlight, a sunlight collection unit for collecting sunlight focused by the lens system, a l-th sensor for detecting the total amount of sunlight, and a focal length f of the lens system. Detecting the amount of direct sunlight within the range h (o≦h≦f) and arranged such that one end is in contact with the outer periphery of the light flux leading to the solar image formed by the lens system and the other end is outside the light flux. a second sensor that detects the amount of indirect sunlight, and a third sensor that has the same structure as the second sensor and is disposed at a symmetrical position and detects the amount of indirect sunlight. A sunlight collecting device characterized in that the polarization of the angle of incidence of light with respect to the lens system is detected.