JPS5836885B2 - How to adjust the angle of a plane mirror in a heliostat reflector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting the angle of a plane mirror in a heliostat reflector.

As shown in FIG. 1, the reflecting mirror used in the heliostat, which tracks the sun and always reflects the sunlight in a fixed direction, has a large number of plane mirrors 1 fixed to a frame 2 at different angles.

Sunlight 5 incident parallel to the optical axis 4 of the reflecting mirror is reflected by the reflecting mirror 1, and all of the reflected light 6 is made to converge at a focal point 7.

As a method of checking whether the angle at which each plane mirror 1 of the reflecting mirror is fixed to the frame is correct, a method as shown in FIG. 2 has been conventionally used.

In Fig. 2, 1 is a plane mirror, 2 is a frame, 3 is a mirror mounting bracket, 4 is an optical axis of a reflecting mirror, 5 is a laser beam, 6 is a reflected light, 7 is a focal point of the reflecting mirror, 8 is a laser device, 9 is a translation device, and 10 is a screen.

This screen 7 is installed perpendicularly to the optical axis 4 at the focal point 7 position.

The parallel displacement device 9 is installed so that it can be translated in a plane perpendicular to the optical axis 4, and the laser beam 5 emitted from the laser device 8 attached to the parallel displacement device 9 always aligns with the optical axis 4. It is made to be parallel to.

This laser device 8 irradiates the center of each plane mirror 1 with laser light 5, and the reflected light 6 is reflected onto the screen 10.
The fixed angle of the plane mirror 1 to the frame 2 was checked by observing whether the focal point 7 was correctly reached at the top.

However, the above checking method had the following drawbacks.

First, a laser device 8 and a translation device capable of translating the laser device 8 over the entire area of the reflecting mirror are required, and these devices are large-scale and expensive, and this checking method is inefficient and time-consuming.

In view of the above drawbacks, the method of the present invention proposes a method for adjusting the fixing angle of a plane mirror to a frame at low cost using a simple device.

Hereinafter, the present invention will be explained using one embodiment shown in FIGS. 3 to 1.

In Figures 3 to 5, 1 is a plane mirror, 4 is the optical axis of the reflecting mirror 13, 7 is the focal point of the reflecting mirror 13, 11 is a checking frame, and a number plate 12 is attached to the intersection of the grid. .

Reference numeral 14 indicates a monitor camera installed at the focal point 7, 15 indicates a monitor television, and 16, 17, and 18 each indicate light from the frame 11 for the check.

The reflecting mirror 13 has a total of 16 square plane mirrors arranged in four rows each vertically and horizontally.

The Cheseok frame 11 has a square lattice in five rows each in the vertical and horizontal directions, and the number plate 12 attached to the intersection of the 1- and 1- squares forms a square, facing the reflecting mirror 13. There is.

This checking frame 11 is installed perpendicularly to the optical axis 4 at the focal point 7 position of the reflecting mirror 13.

In Figure 5, one plane mirror and one person are connected to the monitor TV 1.
Take a look at 5.

Then, if the fixed angle of one plane mirror is correct, the plane mirror 1
Light 16, 17, and 18 emitted from the area indicated by A in Figure 7, which faces the person, is reflected by one plane mirror and reaches the focal point 7.
reach.

That is, image B of range A appears reflected on the plane mirror.

Also, the light at 16, 17, and 18 is reflected by a plane mirror and follows an optical path twice the focal length until it reaches focal point 7, so
Image B reflected on the plane mirror appears to be half the size of the grid in range A of the checking frame.

In this way, it is possible to check whether the fixed angle of each plane mirror 1 of the reflecting mirror 13 is correct and by how much it is deviated just by focusing the monitor camera 14 and viewing it on the monitor TV 15. The time required for this is significantly reduced compared to traditional methods.

Also, what is required as a device is a check frame 11.
Since only the number plate 12, monitor camera 14, and monitor television 15 are required, it is extremely inexpensive compared to a method using a laser.

Note that letters or symbols may be used instead of the numbers on the number plate 12.

Further, the check frames may be color-coded for each grid.

[Brief explanation of the drawing]

FIG. 1 is a side view of a reflecting mirror, FIG. 2 is a side view for explaining a conventional checking method, FIGS. 3 to 7 show an embodiment of the present invention, and FIG. 3 is a perspective view. Fig. 4 is a plan view of the checking frame, Fig. 5 is a side view, Fig. 6 is an arrow view of the main part along the VI-Vl arrow direction in Fig. 5, and Fig. 7 is a - ■Shows a view of the main parts along the arrow. 1...Flat mirror, 2...Frame, 5.
...Sunlight, 13...Reflector, 7...
...Focus, 4...Optical axis, 11...Check frame, 14...Monitor camera lens O

Claims (1)

[Claims] 1 A large number of plane mirrors are fixed to the frame at different angles, and the focal position of the hemi-ostat reflector is perpendicular to its optical axis to track the sun and always reflect the sunlight in the -4 direction. A checking frame is installed, and the fixing angle of the plane mirror to the frame is adjusted by visually confirming the image of the checking frame reflected on the plane mirror with a monitor camera disposed at the focal position. A method for adjusting the angle of a plane mirror in a heliostat reflector.