JPS59202360A - Heliostatic sensor - Google Patents

Abstract

PURPOSE:To reduce the number of component parts and reduce cost, by a method wherein the second detecting surfaces having opposite surfaces inclined in opposite directions are provided at side edges of the first detecting surface, and a projected wall is provided between light-receiving elements provided on the first detecting surface. CONSTITUTION:The first detecting surface 21, which is a flat rectangular surface, is provided on the front end face of a main body 20, and an angular shaft form projected wall 22 is provided at the center or the first detecting surface 21. The light-receiving elements a1, a2, a3, a4 are provided at the outer periphery of the projected wall 22, the second detecting surfaces 24 having opposite surfaces inclined in opposite directions are provided at side edges of the first detecting surface 21, and light-receiving elements A1, A2, A3, A4 are provided respectively at substantially central parts of the second detecting surfaces 24. Accordingly, a roughly adjusting action can be performed by each of the light- receiving elements A1, A2, A3, A4, while a finely adjusting action can be performed by each of the light-receiving elements a1, a2, a3, a4, it is unnecessitated to provide any sensor for rough adjustment, and the cost can be reduced through reducing the number of component parts.

Description

Detailed Description of the Invention <Technical Field of the Invention> The present invention relates to, for example, a technique for adjusting the direction and vertical inclination of a light condensing plate. This invention relates to a solar tracking sensor that positions a solar panel facing the sun.

<Background of the Invention> Conventionally, this type of sensor has a total of 4 sensors at each 90 degree equiangular position.
The light-concentrating plate is tilted vertically and horizontally, and the movement of the light-condensing plate is stopped at a position where the amount of light received by each light-receiving element is balanced. However, although this type of sensor is suitable for adjusting the light condensing plate in a small angular range, it is not suitable for tracking the sun over a wide angular range.Therefore, the conventional device example In this method, a separately provided rough adjustment mechanism is used to move the light condensing plate in the direction of the sun, and then the direction of the light condensing plate is finely adjusted using the above-mentioned sun tracking sensor.

For this reason, the conventional method requires a sensor for rough adjustment, which causes many problems such as increased cost and complicated structure.

<Object of the Invention> The present invention provides a novel solar tracking sensor that can be applied to both coarse adjustment and fine adjustment operations, thereby reducing the number of parts such as a condensing device, reducing costs and improving the structure. The purpose is to simplify the process.

<Structure and Effects of the Invention> In order to achieve the second object, the present invention forms a second sensing surface whose opposing surface is inclined in the opposite direction at each edge of the rectangular flat first sensing surface. , a light-receiving element is disposed inside each edge of each of the second detection surface and the first detection surface, and
A protruding wall was formed between each light receiving element on the detection surface.

According to the present invention, each light receiving element on the second sensing surface can perform a coarse adjustment operation, and each light receiving element on the first sensing surface can perform a fine adjustment operation, and as in the conventional example, a rough adjustment sensor is separately provided. etc., and achieves the excellent effects of achieving the purpose of the invention, such as reducing costs and simplifying the structure.

<Description of Embodiments> FIG. 1 shows a schematic configuration of a light condensing device, in which a rectangular light condensing plate is erected on a circular track 4 so as to be freely slidable.

A direction adjustment motor 41 and an altitude adjustment motor 42 are connected to the light condensing plate 1. The direction adjustment motor 41 slides the light condensing plate 1 along the circular track 4, and the altitude adjustment motor 42 makes the light condensing plate 1 slide. Tilt up and down. A solar tracking sensor 2 according to the present invention is mounted on the upper side of the light condensing plate 1, and the control device 3 controls each motor 41,
42 by a predetermined angle to position the light collecting plate 1 facing the sun 10.

2 to 4 show the solar tracking sensor 2, and the device body 2
A flat first sensing surface 21 having a rectangular shape is formed on the front end surface of 0, and a protruding wall 22 having a rectangular shaft shape is formed at the center of the first sensing surface 21. Light receiving elements alla2+J+a4 are respectively arranged on the outer periphery. A vertical wall 23 is formed on each edge of the first detection surface 21, and each vertical wall 2
3 has a second sensing surface 24 that slopes downwardly toward the outside.
At the same time, each second sensing surface ? 4, there are light receiving elements A4, 4, A) at approximately the center of each of them.

A& is installed.

5 and 6 show other embodiments of the solar tracking sensor 2. FIG. The sensor 2 in the illustrated example has each second sensing surface 24 connected to the first
The light-receiving elements a1 to a4 and A, to A4 are arranged at the same positions as in the first embodiment. An example of a circuit configuration is shown in which light receiving elements A1 and A, , A, and 7'l-4! are located at opposing positions on each of the first and second detection surfaces 21.24. dl and a, 1
The outputs a5 and a constitute two outputs of the logarithmic differential amplifier 5, respectively. Each logarithmic differential amplifier 5 sends out a cutting signal according to the logarithmic ratio of two forces from the light receiving elements, and for example, each input of the light receiving elements A, , A,
, I (A,), the output P of the logarithmic differential amplifier 5
is expressed by the following formula.

P = K-4n I(A' ■(n) However, K is a constant.

A polarity determination circuit 6 consisting of a positive polarity signal detector 61 and a negative polarity signal detector 6o is connected to each logarithmic differential amplifier 5. This polarity determination circuit 6 determines the output of the logarithmic differential amplifier 5 using a certain threshold level.
When making a positive determination, the positive polarity signal detector 61 outputs a detection signal, and when making a negative determination, the negative polarity signal detector 60 outputs a detection signal. Each detector 61 .
The detection signal from 60 is input to the drive signal generation circuits 7 and 70, and the detection signals from the light receiving elements a1 to a and the respective detectors 6
The detection signal of 1.60 is inputted to the drive signal generation circuit 7.70 via gate circuits 91-94. These gate circuits 91 to 94 are connected to each detector 61 connected to the light receiving elements A1 to A4.
．． Opening/closing is controlled by the detection signal from 60, and the OR circuit 8
．． When a signal is input from 80, a "gate closed" prohibited state is formed. Each drive signal generation circuit 7.70 outputs a drive signal for driving the azimuth adjustment motor 41 and the altitude adjustment motor 42 in the forward and reverse directions, and in the illustrated example, the drive signal applied to the light receiving elements A1, A2 and allaff is The signal generating circuit 7゜70 generates a drive signal H for the direction adjustment motor 41.
A(+1゜HA(-), Ha(-1-1, Ha(-)
), and the light receiving elements A, , A, and as + 2
The drive signal generation circuits 7 and 70 related to 4 generate drive signals VA (→→r, VA(-), Va) of the altitude adjustment motor 42.
(−1→.

Va(-) is output respectively.

For example, when the sun is located in the direction opposite to the photodetector A3, the amount of light received by the photodetector A1 is greater than the amount of light received by the photodetector A2, and the amount of light received by the photodetector A5 is the amount of light received by the photodetector A. Become bigger.

As a result, the light receiving elements A, , A, and A, , A
Each positive polarity signal detector 61.61 related to 4 outputs a detection signal, and the drive signal generation circuits 7, 7 generate a drive signal HA(''→
.

VA (+1 is output. Thus, each of the motors 41 and 42 for azimuth adjustment and altitude adjustment is driven to slide the light condensing plate 1 along the circular trajectory 4 and tilting it upward, and the light condensing plate 1
Point it toward the sun 10 (coarse adjustment). In this case, each of the gate circuits 91 to 94j receives a prohibition signal from the OR circuits 8 and 80, and a prohibition state of "gate open" is formed.
Therefore, the driving signal generating circuits 7, 7o corresponding to the light receiving elements a1 to a, l do not operate. Then, due to the operation of the light condensing plate 1,
When the amounts of light received by the light receiving elements A, A, A, and A4 match, the drive signal HA (+l, VA
(-1-1 disappears, but each gate circuit 91 to 94
``Gate Open'', the inhibited state is canceled, and then the fine adjustment operation begins.

Now, assuming that the position of the sun 10 is slightly biased in the direction of the light receiving elements a, , a, sunlight to the light receiving element Jya4 is blocked by the protruding wall 22.

Therefore, the light receiving element a receives a larger amount of light than the light receiving element a2, and the light receiving element a5 receives a larger amount of light than the light receiving element a4. As a result, the positive polarity signal detectors 61, 61 connected to the light receiving elements "Inε12 and a, , a" output detection signals, and the drive signal generation circuits 7, 7 output drive signals Ha((1), Va(1) Output.

In this way, each motor 41, 42 is driven to slightly move the light condensing plate 1 until the amount of light received is balanced.
Position facing 0.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the schematic configuration of the condensing device, Fig. 2 is a perspective view of the solar tracking sensor, Fig. 3 is its front view, Fig. 4 is its side view, and Fig. 5 is another implementation. FIG. 6 is a perspective view of the solar tracking sensor according to the example, FIG. 6 is a side view thereof, and FIG. 7 is a block diagram showing the circuit configuration of the device. 21... 1st detection surface 24.°°... 2nd detection surface 2
2°°゛′ protruding wall A1-A4. a, ~a4 ... Light receiving element patent applicant Tateishi Electric Co., Ltd. / Country J-62

Claims (1)

[Claims] ■ A second sensing surface whose opposing surface is inclined in the opposite direction is formed at each edge of the rectangular flat first sensing surface, and each of the second sensing surface and the first sensing surface A solar tracking sensor in which light-receiving elements are arranged on the inner side of the periphery, and a protruding wall is formed between each light-receiving element on the first detection surface. (2) The solar tracking sensor according to claim 1, wherein each second detection surface is inclined outwardly. (2) The solar tracking sensor according to claim 1, wherein each second detection surface is inclined inwardly.