Solar apparent motion measurement and demonstration device and demonstration method thereof

Abstract

The invention relates to a solar apparent motion measurement and demonstration device and a demonstration method thereof. The solar apparent motion measurement and demonstration device comprises a support foot, a laser lamp, a controllable reversible motor, a unidirectional rotary motor, an electricity-conductive sliding ring, a simple terrestrial globe, a solar term time sphere, a sky hemisphere and an earth hemisphere. The simple terrestrial globe is positioned at the inner center of the solar term time sphere, azimuth angle scale lines and elevation angle scale lines are engraved on the sky hemisphere, a power socket, a control switch A and a control switch B are mounted on a flange of the earth hemisphere, solar term latitude lines, time scale lines and observation place latitude scales are engraved on the spherical surface of the solar term time sphere, the laser lamp is mounted on a rotating shaft of the controllable reversible motor, and the controllable reversible motor is mounted on a rotating shaft of the unidirectional rotary motor and drives the laser lamp to bidirectionally swing in a limited mode. The solar apparent motion measurement and demonstration device and the demonstration method thereof have the advantages that solar apparent motion in any day in any solar term in any latitude area on the earth can be measured visually and accurately, and the position and the motion trail of the sun in the sky of an observation place can be demonstrated visually and accurately.

Description

technical field [0001] The invention relates to a solar apparent motion measurement and demonstration method and a demonstration device thereof, belonging to the field of demonstration instruments of natural geographical laws. Background technique [0002] The earth moves around the sun with a cycle of one year. Since the angle between the ecliptic plane and the equator plane is 23.5 degrees, the direct sunlight point swings back and forth between the Tropic of Cancer and the Tropic of Cancer on the earth. Due to the rotation of the earth, one cycle per day, Day and night alternate. For the observers on the earth, the sun rises and sets in the east and west in the sky, and draws a track in the sky, and the sun's altitude and azimuth angle are constantly changing. Since the earth is spherical, so for different latitudes on the earth In different regions, the observed movement of the sun in the sky and its changes in altitude and azimuth angles are different. For example, pola...

AI Technical Summary

Problems solved by technology

[0002] The earth moves around the sun with a cycle of one year. Since the angle between the ecliptic plane and the equator plane is 23.5 degrees, the direct sunlight point swings back and forth between the Tropic of Cancer and the Tropic of Cancer on the earth. Due to the rotation of the earth, one cycle per day, Day and night alternate. For the observers on the earth, the sun rises and sets in the east and west in the sky, and draws a track in the sky, and the sun's altitude and azimuth angle are constantly changing. Since the earth is spherical, so for different latitudes on the earth In different regions, the observed movement of the sun in the sky and its changes in altitude and azimuth angles are different. For example, polar day and polar night phenomena will also appear in polar regions. It is difficult to demonstrate the solar terms, time, The change of the apparent motion trajectory caused by the change of the observed latitude

Images