Horizontal base plane demonstration instrument for annual solar apparent motion

Abstract

The utility model relates to a scientific research teaching instrument, in particular to a solar annual apparent motion horizontal base plane demonstration instrument, which comprises a transparent spherical shell, an arch-shaped support and a base, two rotating shafts are arranged on the transparent spherical shell, and the two rotating shafts and the center of the transparent spherical shell are positioned on the same straight line; two ends of the arch-shaped bracket are respectively connected with the two rotating shafts; the transparent spherical shell rotates on the inner side of the arch-shaped support through the rotating shaft, and the central angle of the center lines of shaft holes in the two ends of the arch-shaped support is 180 degrees. Two pairs of clamping handles are arranged on the base, and the upper ends of the clamping handles penetrate through the arc edges of the arch-shaped support through fastening bolts so that the clamping handles can be fixedly connected to the base; the internal space of the transparent spherical shell is filled with built-in hemispherical liquid, and the volume of the built-in hemispherical liquid is half of the internal volume of the transparent spherical shell; through relative rotation between the transparent spherical shell and the liquid level of the built-in hemispherical liquid, the utility model provides a teaching instrument for observing the annual apparent motion trail of the sun and the position of the terminator line at all seasons at any latitude, and the teaching instrument is simple in structure, simple and convenient to operate and strong in intuition.

Description

Technical Field

[0001] This utility model relates to scientific research and teaching instruments, specifically to a horizontal base plane demonstrator of the apparent annual motion of the sun. Background Technology

[0002] While rotating on its axis, the Earth also revolves around the Sun. The plane of Earth's rotation is called the equatorial plane, and the plane of its revolution is called the ecliptic plane. Since the equatorial plane and the ecliptic plane intersect at an angle of 23.43°, when the Earth completes one revolution around the Sun, the point where the Sun's rays are directly overhead moves back and forth between the Tropic of Cancer and the Tropic of Capricorn in one tropical year. This annual movement of the apparent solar motion, observed from any location on Earth, follows the same pattern. This annual movement of the point where the Sun's rays are directly overhead causes the annual variations in the noon solar altitude angle and the length of day and night at different locations on the Earth's surface.

[0003] Because the Earth is an opaque sphere, the sun can only illuminate half of its surface at any given time. The hemisphere facing the sun experiences daytime, while the hemisphere facing away from the sun experiences nighttime. The dividing line between the day and night hemispheres is called the terminator. The terminator divides the latitude lines it passes through into day arcs and night arcs. Except for the spring and autumn equinoxes at the equator, when day and night are of equal length, day and night are of unequal length in all other places (except the equatorial region).

[0004] From the spring equinox to the autumn equinox, it is summer in the Northern Hemisphere. During this time, the sun shines directly on the Northern Hemisphere, and the days are longer than the nights at all latitudes. The higher the latitude, the longer the days and the shorter the nights, culminating in polar day (polar day) around the North Pole. On the summer solstice, the sun shines directly on the Tropic of Cancer, resulting in the longest day and shortest night in the Northern Hemisphere, with polar day occurring in the Arctic Circle and areas north of it. The opposite is true in the Southern Hemisphere.

[0005] From the autumnal equinox to the vernal equinox of the following year, it is the winter half-year in the Northern Hemisphere. The sun shines directly on the Southern Hemisphere, and at all latitudes in the Northern Hemisphere, the night is longer than the day. The higher the latitude, the shorter the day and the longer the night, culminating in polar night around the North Pole. On the winter solstice, the sun shines directly on the Tropic of Capricorn, resulting in the shortest day and longest night in the Northern Hemisphere, with the Arctic Circle and areas north of it experiencing polar day. The opposite is true in the Southern Hemisphere.

[0006] The length of day and night reflects the length of sunshine, and the noon solar altitude angle reflects the intensity of solar radiation. The combination of the two can qualitatively express the amount of solar radiation energy at a certain time and place. The distribution of solar radiation energy on the Earth's surface has an annual variation pattern, thus forming the four seasons and five climatic zones.

[0007] The above knowledge points constitute the main content of Chapter 1 of the regular high school geography textbook (compulsory 1). In the chapters on Earth's rotation and revolution, and the geographical significance of Earth's movements, multiple planar diagrams are used to help students understand this knowledge; however, for some students lacking spatial imagination, it is difficult to grasp the key points. Currently, there are no teaching aids for this content used to assist teaching in high school geography. Summary of the Invention

[0008] To address the aforementioned technical problems, this utility model provides a solar annual apparent motion horizontal base plane demonstrator, comprising a transparent spherical shell, an arc-shaped support, and a base;

[0009] Two rotating shafts are provided on the transparent spherical shell, and the two rotating shafts are aligned with the center of the transparent spherical shell.

[0010] The two ends of the bow-shaped bracket are respectively movably connected to the two rotating shafts; the transparent spherical shell is suspended on the bow-shaped bracket through the rotating shafts and can rotate inside the bow-shaped bracket;

[0011] The transparent spherical shell can rotate 360° around the pivot inside the bow-shaped support;

[0012] There is a gap between the bow-shaped bracket and the transparent spherical shell, and the central angle of the center line of the shaft hole at both ends of the bow-shaped bracket is equal to 180°;

[0013] Optionally, the arc length of the bow-shaped bracket is slightly greater than that of the semicircle;

[0014] Two pairs of clamps are fixedly installed on the base, and fastening bolts are provided at the upper end of the clamps.

[0015] The fastening bolt penetrates the arc edge of the bow-shaped bracket, fixing the bow-shaped bracket to the base;

[0016] Preferably, the penetration point is close to the outer arc edge of the bow-shaped support to ensure the stability of the instrument during use;

[0017] The internal space of the transparent spherical shell is filled with an internal hemispherical liquid, the volume of which is half the internal volume of the transparent spherical shell;

[0018] The selection of built-in hemispherical liquids generally requires good fluidity, environmental adaptability, and non-toxicity;

[0019] Because the liquid surface of the inner hemisphere placed inside the transparent spherical shell is always horizontal, the relative rotation between the isochronous meridians and latitude scales marked on the surface of the transparent spherical shell and the liquid surface of the inner hemisphere can show the trajectory of the sun's annual apparent motion and the position of the terminator in all four seasons from any latitude location.

[0020] In some embodiments, a semi-circular angle plate is fixedly provided on the outer side of one end of the bow-shaped bracket;

[0021] The straight edge of the semicircular angle disc is set horizontally upward, and its arc edge is set with a scale, marked with north and south latitude angle values ​​of 90°~0°~90° and corresponding text marks, with the scale division value being 1°.

[0022] In some embodiments, one end of the rotating shaft penetrates the semi-circular angle disk, and a pointer is fixedly installed on the rotating shaft on the outer side of the semi-circular angle disk panel, rotating with the rotating shaft.

[0023] In some embodiments, the transparent spherical shell is formed by tightly bonding two transparent hemispherical shells with an outer diameter of 100-300 mm and a wall thickness of 1-3 mm together.

[0024] Preferably, the outer diameter is 200mm and the wall thickness is 2mm;

[0025] The diameter of the shaft is 6mm and the length is 16mm.

[0026] In some embodiments, the bow-shaped bracket has an inner diameter of 212 mm, an outer diameter of 232 mm, a thickness of 10 mm, and an outer arc length of 380 mm.

[0027] The inner diameter of the bow-shaped support is larger than the outer diameter of the transparent spherical shell, ensuring that the transparent spherical shell can rotate around the axis of rotation.

[0028] In some embodiments, the semi-circular angle disk has a diameter of 70 mm and a thickness of 1 mm;

[0029] The pointer is 32mm long, 1.5mm wide, and 0.5mm thick.

[0030] In some embodiments, the base is a frustum structure;

[0031] The lower diameter of the base is 200mm, and the upper diameter is 120mm;

[0032] The handle has a height of 25mm, a width and thickness of 6mm, and a central groove width of 10mm.

[0033] In some embodiments, the built-in hemispherical liquid is an aqueous solution of blue dye with a volume of 1970 ml.

[0034] In some embodiments, the surface of the transparent spherical shell is provided with 24 isochronous meridians spaced at 15° intervals and latitude scales with a division value of 1°, along with corresponding time marks. The time on the isochronous meridian at the lower end of the sphere is 0:00, the time on the isochronous meridian at the rear end of the sphere is 6:00, the time on the isochronous meridian at the upper end of the sphere is 12:00, and the time on the isochronous meridian at the front end of the sphere is 18:00. The 0:00, 6:00, 12:00, and 18:00 of the isochronous meridians are also marked with latitude scales of 90° to 0° to 90° with a division value of 1° and corresponding text marks, forming two mutually perpendicular latitude scales.

[0035] The latitude scale circles include the solar term day latitude circle, the large interval latitude circle, and the North and South Poles;

[0036] In some embodiments, the transparent spherical shell 1 has a solar term latitude circle on its spherical surface; the solar term latitude circle is marked at 23.43°N, 22.6°N, 20.15°N, 16.34°N, 11.47°N, 5.91°N, 0°, 5.91°S, 11.47°S, 16.34°S, 20.15°S, 22.6°S, and 23.43°S, respectively, with the corresponding summer solstice (June 21-22) and Tropic of Cancer, Grain in Ear (June 5-6) and Minor Heat (July 7-8), Grain Buds (May 21-22) and Major Heat (July 23-24), and Beginning of Summer (May 5-6) and Beginning of Autumn. The dates and their corresponding dates are marked with text, including: Autumn (August 7-8), Grain Rain (April 20-21) and End of Heat (August 23-24), Pure Brightness (April 4-5) and White Dew (September 7-8), Spring Equinox (March 20-21) and Autumn Equinox (September 23-24) and the equator, Awakening of Insects (March 5-6) and Cold Dew (October 8-9), Rain Water (February 19-20) and Frost's Descent (October 23-24), Beginning of Spring (February 4-5) and Beginning of Winter (November 7-8), Major Cold (January 20-21) and Minor Snow (November 22-23), Minor Cold (January 5-6) and Major Snow (December 7-8), Winter Solstice (February 21-22) and the Tropic of Capricorn.

[0037] The large-interval latitude circles are marked with corresponding text labels at 30°N, 45°N, 60°N, 75°N, 30°S, 45°S, 60°S, and 75°S.

[0038] The Arctic and Antarctic Circles are located at 66.57°S and 66.57°N respectively, and are marked with the words "Arctic Circle" and "Antarctic Circle".

[0039] When the transparent shell sphere is rotated, the relative positions of the liquid surface of the inner semi-sphere, the isochronous meridians, and the scale circles of each latitude value coincide, which can be used to observe the annual apparent motion trajectory of the sun and the position of the terminator in all four seasons at any latitude location.

[0040] In simulating the apparent annual motion of the sun, the transparent spherical shell and pointer are first adjusted to the corresponding positions on the semi-circular scale based on the latitude of a specific observation location. The liquid surface of the inner hemisphere represents the Earth's surface, while the transparent spherical shell represents the celestial sphere. The latitude circles marked on the surface of the spherical shell for each solar term represent the apparent motion trajectory of the sun on the corresponding solar term day. For non-solar term days, the sun's position is determined by interpolation. In this way, the surface of the transparent spherical shell can display the apparent motion trajectory of the sun at that latitude location throughout the four seasons and its annual variation. By changing the latitude angle (from -90° to +90°), the apparent motion trajectory and annual variation of the sun at any latitude location globally can be simulated.

[0041] To simulate the position and changing patterns of the terminator on the Earth's surface throughout the four seasons, the transparent spherical shell, along with the pointer, is first rotated to the latitude position corresponding to the outer edge of the semicircular scale, based on the latitude of the subsolar point corresponding to the observation date (determined by interpolation for non-solar dates). In this model, the transparent spherical shell represents the Earth, the edge of the liquid surface inside the hemisphere represents the terminator, and the latitude circle of that day represents the daily trajectory of the subsolar point on the Earth's surface. Any latitude circle on the surface of the transparent spherical shell is divided into day arcs and night arcs by the liquid surface; the arc length above the liquid surface represents the day length, and the arc length below the liquid surface represents the night length. Combining this with the isochronous meridians marked on the surface of the transparent spherical shell, the specific times of sunrise and sunset at any latitude on that day can be obtained. By adjusting the transparent spherical shell to rotate according to the latitude of the subsolar point (within the range of -23.43° to +23.43°) corresponding to each observation date, information such as the position of the terminator and the specific times of sunrise and sunset at any latitude throughout the four seasons can be obtained from the spherical surface. When the pointer is at 0°, the latitude circles of each solar term are perpendicular to the liquid surface, reflecting that day and night are of equal length at all latitudes on the spring and autumn equinoxes. When the pointer is at 23.43° North latitude, the right side of the latitude circles of each solar term forms an angle of 66.57° with the liquid surface, the entire Arctic Circle is above the liquid surface, and the entire Antarctic Circle is below the liquid surface, reflecting that on the summer solstice, the Northern Hemisphere has the longest day, the Southern Hemisphere has the longest night, the equatorial region still has equal day and night, the Arctic Circle and areas north of it experience polar day, and the Antarctic Circle and areas south of it experience polar night. When the pointer is at 23° South latitude... At 43°, the left side of the latitude circle on each solar term forms an angle of 66.57° with the liquid surface. The entire Antarctic Circle is above the liquid surface, and the entire Arctic Circle is below the liquid surface. This reflects that on the winter solstice, the Southern Hemisphere has the longest day, the Northern Hemisphere has the longest night, the equatorial region still has equal day and night, the Antarctic Circle and areas south of it experience polar day, and the Arctic Circle and areas north of it experience polar night. On other dates, the length of day and night at each latitude falls between that of the summer solstice and the winter solstice. In this way, the position and changing patterns of the terminator at different latitudes around the world throughout the four seasons can be intuitively displayed and understood.

[0042] This invention fully utilizes the natural property that the surface of a liquid in a partially filled container remains horizontal. Through the relative rotation between a transparent spherical shell with a geographic coordinate grid and graphic markings on its surface and the liquid surface of the inner hemisphere, it provides a teaching instrument that can display the annual apparent motion trajectory of the sun and the position of the terminator in all four seasons from any latitude location. It covers the knowledge points in the chapter "The Geographical Significance of Earth's Movements". This three-dimensional teaching aid helps students understand and master common sense and textbook knowledge. It has the advantages of simple structure, easy operation, strong intuitiveness and complete functions, and is especially suitable for application in primary and secondary school geography teaching and popular science activities for teenagers. Attached Figure Description

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1 This is the front view of the present invention;

[0045] Figure 2 This is the right view of the present invention.

[0046] Figure label:

[0047] 1. Transparent spherical shell; 11. Rotating shaft; 12. Isochronous meridian; 13. Latitude value scale ring; 131. Latitude ring for solar terms; 132. Latitude ring with large intervals; 133. North and South Poles; 2. Bow-shaped support; 3. Base; 31. Clamping handle; 32. Fastening bolt; 4. Semi-circular angle plate; 41. Pointer; 5. Internal hemispherical liquid. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0049] In the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0051] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0052] like Figures 1-2 The above-displayed solar annual apparent motion horizontal base plane demonstrator includes a transparent spherical shell 1, an arc-shaped support 2, and a base 3. Two rotating shafts 11 are provided on the transparent spherical shell 1, and the two rotating shafts 11 are aligned with the center of the transparent spherical shell 1. The two ends of the arc-shaped support 2 are respectively movably connected to the two rotating shafts 11. The transparent spherical shell 1 is suspended on the arc-shaped support 2 through the rotating shafts and can rotate inside the arc-shaped support 2.

[0053] When the demonstrator is used to simulate the apparent annual motion of the sun, the transparent spherical shell 1 should rotate no more than 90° to the left or right to present the apparent motion trajectory of the sun throughout the four seasons and the annual variation pattern.

[0054] When the demonstrator is used to simulate the position of the terminator, the transparent spherical shell 1 should be rotated no more than 23.43° to the left or right to present information such as the position of the terminator and the specific times of sunrise and sunset;

[0055] There is a gap between the bow-shaped bracket 2 and the transparent spherical shell 1, and the central angle of the center line of the shaft hole at both ends of the bow-shaped bracket is equal to 180°; two pairs of clamps 31 are fixedly installed on the base 3, and a fastening bolt 32 is provided at one end of the clamp 31; the fastening bolt 32 penetrates the arc edge of the bow-shaped bracket 2 and fixes the bow-shaped bracket 2 to the base 3; the internal space of the transparent spherical shell 1 is filled with an internal hemispherical liquid 5, and the volume of the internal hemispherical liquid 5 is half of the internal volume of the transparent spherical shell 1.

[0056] In some embodiments, a semi-circular angle disc 4 is provided on the outer side of one end of the bow-shaped bracket 2; the straight edge of the semi-circular angle disc 4 is horizontally upward, and its arc edge is provided with a 90°~0°~90° scale and corresponding text markings, with the scale division value being 1°.

[0057] In some embodiments, one end of the rotating shaft 11 penetrates the semi-circular angle disk 4, and a pointer 41 is fixedly installed on the rotating shaft on the outer side of the panel of the semi-circular angle disk 4, which rotates with the rotating shaft 11.

[0058] In some embodiments, the transparent spherical shell 1 is formed by bonding two transparent hemispherical shells with an outer diameter of 200 mm and a wall thickness of 2 mm together; the rotating shaft 11 has a diameter of 6 mm and a length of 16 mm; the bow-shaped support 2 has an inner diameter of 212 mm, an outer diameter of 232 mm, a thickness of 10 mm, and an outer arc length of 380 mm; the semi-circular angle dial 4 has a diameter of 70 mm and a thickness of 1 mm; the pointer 41 has a length of 32 mm, a width of 1.5 mm, and a thickness of 0.5 mm; the base 3 is a frustum structure; the lower diameter of the base 3 is 200 mm, and the upper diameter is 120 mm; the handle 31 has a height of 25 mm, a width and a thickness of 6 mm, and the width of its central groove is 10 mm; the internal hemispherical liquid 5 is an aqueous solution of blue dye with a volume of 1970 ml;

[0059] The dimensions disclosed above for the solar annual apparent motion horizontal base plane demonstrator are sizes suitable for conventional teaching. The design of the demonstrator allows for size adjustments without altering its core teaching objectives and demonstration effects, in order to adapt to different teaching environments and needs.

[0060] In some embodiments, the transparent spherical shell 1 has 24 isochronous meridians 12 spaced at 15° intervals and latitude scale circles 13 with a division value of 1° on its spherical surface; the isochronous meridians 12 are marked with corresponding time marks from 0:00 to 23:00; the isochronous meridians 12 at 0:00, 6:00, 12:00, and 18:00 are also marked with latitude scales from 90° to 0° to 90° with a division value of 1° and corresponding text markings; the latitude scale circles 13 include solar term latitude circles 131 and large-interval latitude circles 131. The latitude circles 132 and 133 are used for the solar terms; the latitude circles 131 for the solar terms are marked at 23.43°N, 22.6°N, 20.15°N, 16.34°N, 11.47°N, 5.91°N, 0°, 5.91°S, 11.47°S, 16.34°S, 20.15°S, 22.6°S, and 23.43°S, respectively, with the corresponding summer solstice (June 21-22) and the Tropic of Cancer, the Grain in Ear (June 5-6) and Minor Heat (July 7-8), and Minor Fullness (May 21-22) markings. 2) and the Great Heat (July 23-24), the Beginning of Summer (May 5-6) and the Beginning of Autumn (August 7-8), the Grain Rain (April 20-21) and the End of Heat (August 23-24), the Pure Brightness (April 4-4) and the White Dew (September 7-8), the Spring Equinox (March 20-21) and the Autumn Equinox (September 23-24) and the equator, the Awakening of Insects (March 5-6) and the Cold Dew (October 8-9), the Rain Water (February 19-20) and the Frost's Descent (October 23-24), the Beginning of Spring (February 4-5) and the Beginning of Winter (November 7-8), the Great Cold ( The date is marked with text such as 1.20~21), Minor Snow (11.22~23), Minor Cold (1.5~6), Major Snow (12.7~8), Winter Solstice (2.21~22), and Tropic of Capricorn; the large-interval latitude circle 132 is marked with corresponding text at 30°N, 45°N, 60°N, 75°N, 30°S, 45°S, 60°S, and 75°S; the Arctic and Antarctic Circles 133 are located at 66.57°S and 66.57°N, respectively, and are marked with the text of the Arctic and Antarctic Circles.

[0061] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A solar annual apparent motion horizontal base plane demonstrator, characterized in that, It includes a transparent spherical shell (1), an arc-shaped support (2), and a base (3); Two rotating shafts (11) are provided on the transparent spherical shell (1), and the two rotating shafts (11) are in a straight line with the center of the transparent spherical shell (1); The two ends of the bow-shaped bracket (2) are movably connected to the two rotating shafts (11); the transparent spherical shell (1) is suspended on the bow-shaped bracket (2) through the rotating shafts (11) and can rotate inside the bow-shaped bracket (2); There is a gap between the bow-shaped bracket (2) and the transparent spherical shell (1), and the central angle of the center line of the shaft hole at both ends of the bow-shaped bracket (2) is equal to 180°; Two pairs of clamps (31) are fixedly installed on the base (3), and fastening bolts (32) are provided at the upper end of the clamps (31). The fastening bolt (32) penetrates the arc edge of the bow-shaped bracket (2) and fixes the bow-shaped bracket (2) to the base (3); The internal space of the transparent spherical shell (1) is filled with an internal hemispherical liquid (5), the volume of which is half the internal volume of the transparent spherical shell (1).

2. The solar annual apparent motion horizontal datum demonstrator according to claim 1, characterized in that, A semi-circular angle plate (4) is fixedly installed on the outer side of one end of the bow-shaped bracket (2). The straight edge of the semicircular angle disc (4) is set horizontally upward, and its arc edge is set with 90°~0°~90° scale and corresponding text markings, with the scale division value being 1°.

3. The solar annual apparent motion horizontal base plane demonstrator according to claim 2, characterized in that, One end of the rotating shaft (11) penetrates the semi-circular angle disk (4), and a pointer (41) is fixedly installed on the rotating shaft on the outer side of the panel of the semi-circular angle disk (4), which rotates with the rotating shaft (11).

4. The solar annual apparent motion horizontal datum demonstrator according to any one of claims 1 to 3, characterized in that, The transparent spherical shell (1) is formed by bonding two transparent hemispherical shells with an outer diameter of 100-300 mm and a wall thickness of 1-3 mm together.

5. The solar annual apparent motion horizontal datum demonstrator according to any one of claims 1 to 3, characterized in that, The base (3) is a frustum structure.

6. The solar annual apparent motion horizontal datum demonstrator according to claim 4, characterized in that, The built-in hemispherical liquid (5) is an aqueous solution of blue dye.

7. The solar annual apparent motion horizontal datum demonstrator according to claim 4, characterized in that, The transparent spherical shell (1) has 24 isochronous meridians (12) spaced at 15° intervals and a latitude scale (13) with a division value of 1° on its spherical surface. The isochronous meridians (12) are marked with corresponding time markers from 0:00 to 23:

00. The time of the isochronous meridian (12) at the lower end of the sphere is 0:00, the time of the isochronous meridian (12) at the rear end of the sphere is 6:00, the time of the isochronous meridian (12) at the upper end of the sphere is 12:00, and the time of the isochronous meridian (12) at the front end of the sphere is 18:

00. The isochronous meridians (12) at 0:00, 6:00, 12:00 and 18:00 are marked with latitude values ​​of 90°~0°~90° with a division value of 1° and corresponding text markings. The latitude scale circle (13) includes the large-interval latitude circle (132) and the North and South Poles (133). The large-interval latitude circle (132) is marked with corresponding text labels at 30°N, 45°N, 60°N, 75°N, 30°S, 45°S, 60°S, and 75°S respectively; The Arctic and Antarctic Circles (133) are located at 66.57°S and 66.57°N respectively, and are marked with the words "Arctic Circle" and "Antarctic Circle".

8. The solar annual apparent motion horizontal datum demonstrator according to claim 7, characterized in that, The transparent spherical shell (1) is also provided with a solar term latitude circle (131) on its spherical surface. The latitude circles (131) for the solar terms are located at 23.43°N, 22.6°N, 20.15°N, 16.34°N, 11.47°N, 5.91°N, 0°, 5.91°S, 11.47°S, 16.34°S, 20.15°S, 22.6°S, and 23.43°S, respectively marked with the corresponding dates: Summer Solstice (June 21-22) and Tropic of Cancer, Grain in Ear (June 5-6) and Minor Heat (July 7-8), Grain Buds (June 21-22) and Major Heat (July 23-24), and Beginning of Summer (June 5-6). The dates and times are marked as follows: Autumn 8.7-8, Grain Rain 4.20-21, End of Heat 8.23-24, Pure Brightness 4.4-5, White Dew 9.7-8, Spring Equinox 3.20-21, Autumn Equinox 9.23-24, Equator, Awakening of Insects 3.5-6, Cold Dew 10.8-9, Rain Water 2.19-20, Frost's Descent 10.23-24, Beginning of Spring 2.4-5, Beginning of Winter 11.7-8, Major Cold 1.20-21, Minor Snow 11.22-23, Minor Cold 1.5-6, Major Snow 12.7-8, Winter Solstice 2.21-22, and Tropic of Capricorn.

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