JPS59192210A - Gathering device of solar rays - Google Patents

Abstract

PURPOSE:To eliminate winding and twisting of a lead wire by providing a solar- ray direction detecting sensor on a solar-ray condensing device and converting a direction signal detected by this sensor to a radio signal and receiving this radio signal in a device provided in an optional place other than the place of the solar-ray condensing device. CONSTITUTION:The second parabolic reflection mirror 10 which is placed in the focus position of a parabolic reflection mirror 1 to convert reflected solar rays to a parallel light and reflects it, a photoconductor tube 11 which is rotated together with the first revolving shaft 2 as one body, and the second photoconductor tube 12 where one end is rotatable for the tube 11 and the other has the same axis as the second revolving shaft 7 are provided. Solar rays reflected and condensed by the parabolic reflection mirror 1 are converted to parallel rays by the second parabolic reflection mirror 10 and are led into the photoconductor tube 11. They are transmitted to an optional desired place through the second photoconductor tube 12.

Description

[Detailed Description of the Invention] Recently, we have entered an era of energy saving, and research and development is being actively conducted in various fields regarding the effective use of solar energy. In order to do this, devices that use solar energy are made to follow the movement of the sun. On the other hand, the most effective way to use solar energy is to use it directly as light energy without converting it into other forms of energy such as electrical energy or thermal energy. If the device follows the movement of the sun as described above, a light guide tube, light guide cable or guide port for transmitting the focused sunlight is provided.
The throat is connected around two axes (from the rotating solar concentrator to the fixed part that requires lighting, etc., so that the light conductor cable is not wound or twisted, for example, so as not to be affected by the rotational movement of the solar concentrator). It was very difficult to arrange it so that it wouldn't.

In view of the above-mentioned circumstances, the present applicant has proposed that the light focused by a solar light focusing device that follows the movement of the sun be unaffected by the following movement of the solar light focusing device (i.e., it can be used as a light transmission medium). We have proposed a solar collector that can transmit sunlight to a desired location without causing winding or twisting.

FIG. 1 is a schematic configuration diagram of main parts for explaining an example of a sunlight collecting device proposed by the present applicant.
3 is a first rotation axis for rotating the parabolic reflector 1, and 4 is a fixed arm for integrally fixing the parabolic reflector 1 to the rotation axis 2;
5 is a balance weight, 5 is a motor for rotating the first rotation shaft, 6 is a support arm for rotatably supporting the first rotation shaft 2, and 7 is integral with the support arm 6. 8 is a solar direction detection sensor, and as is well known, the second rotation axis 8 is arranged to be orthogonal to the first rotation axis 2. It detects whether or not it is facing the direction of the sun accurately.
For example, when the parabolic reflector is deviated in the north-south direction with respect to the direction of the sun, the motor 5 is rotated to rotate the first rotating shaft 2 so that the parabolic reflector 1 is accurately aligned with the sun in the north-south direction. When the parabolic reflector 1 is deviated in the east-west direction with respect to the direction of the sun, a motor (not shown) is rotated to rotate the second rotating shaft 7 to direct the parabolic reflector 1 in the east-west direction. The direction is precisely controlled to point in the direction of the sun.

As described above, it is easy to control the parabolic reflector to follow the movement of the sun and convert the sunlight focused at the focal point of the parabolic reflector into electrical energy, thermal energy, etc. for use. However, if you want to use it as optical energy as it is, it is necessary to transmit the focused optical energy as it is to the point of use. It is extremely difficult to transmit light to a fixed part without being affected by rotating parts because of the wrapping and twisting of the optical transmission medium and the wrapping of the lead wire that transmits the detection signal from the sunlight detection sensor. Met.

The sunlight collecting device shown in FIG. 1 was developed in view of the above-mentioned circumstances, and as shown in the figure, the sunlight reflected by the parabolic reflecting mirror 1 is parallel to the focal position of the parabolic reflecting mirror 1. a second parabolic reflector lO1 for converting and reflecting light beams; a first light transmission medium coaxial with and rotating integrally with the first rotation axis 2; for example a light guide tube or a light guide rod; 11, and a second light transmission medium, such as a light guide tube or a light guide rod 12, whose one end is rotatable with respect to the first light guide tube 11 and whose other end is coaxial with the second rotation axis 7; , as described above, the sunlight reflected and focused by the first parabolic reflector 1 is converted into parallel light beams by the second parabolic reflector 10 and guided into the first light guide chisup 11, and the second a third light transmission medium, for example a light guide tube or a light guide rod 13, guided through the light guide tube 11 and the second light guide tube 12 and, if necessary, pivotally coupled to the second light guide tube 12; It is designed so that it can be transmitted to any desired location. Note that the second light guide tube 1
It is also possible to extend and use the portion coaxial with the rotating shaft 7 of No. 2 as is, and in that case, the third light guide tube 13 is not required. Further, reference numeral 14 denotes a transparent container, and the container 14 is used to prevent dust from adhering to the parabolic reflecting mirror and preventing the parabolic reflecting mirror from being swayed by wind or the like.

As described above, according to the solar light collecting device, the light focused by the solar light focusing device can be fixed from the rotating solar light focusing device without being affected by the solar tracking movement of the solar light focusing device. The solar light concentrating device is further equipped with a solar direction detection sensor 8 for detecting the direction of the sun, and the solar direction detection sensor 8 can effectively transmit the solar light to the position. It is necessary to transmit the information to a fixed part where a controller, etc. (not shown) is installed. Various solar direction detection sensors have already been proposed, and in the present invention, as will be clear from the description below, any sensor can be used as long as it can detect the direction of the sun as an electrical or optical signal. For example, it is also possible to use a sunlight direction sensor as described in Japanese Patent Application No. 1978/69781, which was previously proposed by the present applicant. The sunlight direction sensor described in Japanese Patent Application No. 56-69781 converts the direction of the sun into an analog electrical signal using an optical sensor using a light-to-electrical conversion element. The electrical sunlight direction signal detected by the sensor is guided to a control circuit through a lead wire, and the control circuit rotates the first motor 5 that rotates the first rotation shaft 2 and the second rotation shaft 7. A second motor (not shown) is controlled. But in that case,
When an electrical detection signal is guided to a control circuit through a lead wire as in the prior art, the problem of winding or twisting of the lead wire arises as in the case of the optical transmission medium.

The present invention has been made in order to solve the above-mentioned problems of lead wires being wound around or twisted. The transmitter may be controlled to transmit a wireless signal, and the wireless signal may be received by a receiver to control the motor, or as shown in the figure, for example, a solar direction detection sensor controlling the light emitting diode by the electrical detection signal detected by 8;
The light emitted from the light emitting diode is guided around the second rotating shaft 7 through a light transmission medium 15 as shown, for example, and a light receiving end is provided coaxially with the second rotating shaft 7 from the end 15a thereof. The photocell 16 converts the optical signal into an electrical signal, transmits it to the control circuit via the lead wire 17, and controls the control circuit to control the motor. good. Note that the detection signal of the solar direction detection sensor 8 is transmitted to the optical conductor cable 15 as shown in the figure.
When transmitting through a light source, there are problems with the detection sensitivity of the photocell and the influence of extraneous light (noise) if the light is transmitted at different strengths, so the detection signal is converted into a pulse signal to control the on/off of the light emitting diode. However, it is preferable to transmit this optical pulse signal through the optical transmission medium 15. Note that as a means for transmitting the optical signal of the optical transmission medium 15 to the lead wire 17, for example, as shown in FIG.
6 is constructed such that a plurality of photocells 16a are arranged in a ring pattern around the second rotating shaft 7 to receive optical signals emitted from the optical transmission medium 15, and a lead wire 17 is connected to each photocell. may be led to the control circuit, or
Alternatively, as shown in FIG. 2(b), the light receiving surface 18a is
A light guide 18 is provided which is configured in an annular shape around the rotation axis 7 and whose light output end is concentrated at one point 18b, and the light output end 18
The photocell 16 may be arranged at b.

FIG. 3 is a schematic configuration diagram showing another example of a solar light collection device to which the present invention is applied. A light transmitting medium such as a light guide cable or a light receiving end of a light guide rod 21 is disposed at the focal position of the lens, and the sunlight that is focused by the lens 20 and introduced into the light transmitting medium 21 is arranged. Light is introduced through the light transmission medium 21 into a light transmission medium such as a light guide tube or light guide rod 11 disposed coaxially with the first rotating shaft 2 in the same manner as in the example shown in FIG. The subsequent light transmission path, solar direction detection sensor, etc. are the same as in the example shown in FIG.

FIG. 4 is a schematic configuration diagram of main parts showing another embodiment of the present invention. In this embodiment, as shown in the figure, sunlight reflected by a first parabolic reflector 30 is transferred to a second parabolic reflector. 3
1 into a parallel light beam, and this parallel light beam is again reflected by the parabolic reflector 30 of the box 1 to narrow the incident angle and be introduced into the light guide cable 32. A freely rotatable camp ring 33 is disposed coaxially with the second rotating shaft 7 through a point a coaxial with the first rotating shaft 2, and between the first rotating shaft 2 and the second rotating shaft 7. It is designed to be combined. In this way, when the first rotating shaft 2 and the second rotating shaft 7 rotate, the optical conductor cable 32 is twisted around these axes. It is absorbed by the camera ring 33, so that no twisting, winding, etc. occur in the light guide cable.

Similarly, the lead wire 34 for transmitting the electrical output signal from the solar direction detection sensor 8 can also be arranged so as to pass through a point coaxial with the first rotation axis 2 and the second rotation axis 7. In this way, the lead wires 34 are twisted around these rotating shafts, but the twisting, for example, due to the rotation of the first rotating shaft 2,
Since both ends of the lead wire 34 are supported relatively freely due to the flexibility of the lead wire 34, the portion parallel to the rotation axis 2 and both ends of the lead wire 34 are supported relatively freely. It is absorbed, and problems such as winding of the lead wire do not occur. The same applies to torsion caused by the second rotating shaft 7, and the second rotating shaft is It is also possible to effectively absorb the torsion caused by the rotation of 7. It is easily understood that this lead wire 34 may be wired integrally with the optical conductor cable 33, or may be wired completely independently.

As is clear from the above description, according to the present invention, the light focused by the sunlight focusing device that follows the movement of the sun and the detection signal from the solar direction detection sensor installed on the sunlight focusing device, In other words, the optical transmission medium for transmitting the focused sunlight and the optical transmission medium for transmitting the detection signal or the lead wires are not affected by the following movement of the solar light focusing device, or are twisted or twisted. It is possible to transmit the information to the desired location without causing any interference.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of main parts for explaining an example of a sunlight collecting device to which the present invention is applied, and FIGS. 2(a) and (b)
3 is a schematic perspective view of a photocell suitable for use in carrying out the present invention, □ is a schematic configuration diagram of main parts showing another example of a sunlight collecting device to which the present invention is applied, and 4 is a schematic perspective view of a photocell suitable for use in carrying out the present invention. The figure is a schematic perspective view of main parts for explaining another embodiment of the present invention. 1...Solar light focusing device (parabolic reflector), 2...
1st rotation axis, 3... support arm, 4... balance weight. 5... Motor, 6... Support arm, 7... Second rotating shaft, 8... Sun direction detection sensor, 10... Reflector,
11-13... Light transmission medium, 14... Transparent container, 1
5... Optical transmission medium for detecting signal transmission, 16... Photocell, 17... Lead wire, 18... Light guide, 20...
...Lens, 21...Light transmission medium, 30.31...
Parabolic reflector. 32... Optical transmission medium, 33... Coupling, 34
···Lead.

Claims (3)

[Claims] (1) A solar light concentrating device for concentrating sunlight, a first rotating shaft for rotatably supporting the solar light focusing device, and a first rotating shaft that supports the first rotating shaft and that supports the first rotating shaft. a second rotation axis perpendicular to the rotation axis; and an optical transmission medium for receiving and transmitting the light focused by the solar light focusing device, and the optical transmission medium is connected to the first rotation axis and the optical transmission medium. A solar light collecting device disposed coaxially with the second rotating shaft, the solar light direction detecting sensor having a solar light direction detection sensor for detecting the direction of the sun on the solar light concentrating device. A solar light collecting device, characterized in that the sunlight direction signal detected by the solar light collecting device is converted into a radio wave signal and transmitted, and the signal is received by a receiving device installed at an arbitrary location other than the solar light concentrating device. . (2) A solar light concentrating device for concentrating sunlight, a first rotating shaft for rotatably supporting the sunlight concentrating device, and a first rotating shaft that supports the first rotating shaft and that rotates the first rotating shaft. a second rotation axis perpendicular to the axis; and a light transmission medium for receiving and transmitting the light focused by the solar light focusing device,
A solar light collecting device in which the light transmission medium is disposed coaxially with the first rotation axis and the second rotation axis, and a sunlight direction detection for detecting the direction of the sun on the solar light concentrating device. a sensor, which converts a sunlight direction signal detected by the sunlight direction sensor into an optical signal or an infrared signal and guides it into a light conductor cable; A solar light collection device, characterized in that it is arranged along a rotation axis and radiates to a photocell arranged coaxially with the second rotation axis. (3) a parabolic reflector for concentrating sunlight; a first rotating shaft for rotatably supporting the parabolic reflecting mirror; and a first rotating shaft for supporting the first rotating shaft and for supporting the first rotating shaft; a second rotation axis perpendicular to the parabolic reflecting mirror, a reflecting mirror for converting the light focused by the parabolic reflecting mirror into parallel rays and reflecting it to the parabolic reflecting mirror, and a light-receiving end face disposed at the focal position of the parabolic reflecting mirror. and a light guide cable disposed coaxially with the second rotation axis through a point coaxial with the first rotation axis, and a second rotation axis extending from the first rotation axis. A sunlight collecting device characterized in that it is connected by a rotatable coupling on the way to a rotating shaft.