CN2699403Y

CN2699403Y - Seasonal equator sundial

Info

Publication number: CN2699403Y
Application number: CN 200420026853
Authority: CN
Inventors: 郑军
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-30
Filing date: 2004-04-30
Publication date: 2005-05-11
Anticipated expiration: 2014-04-30

Abstract

The utility model relates to a seasonal equator sundial which can be used to confirm time and solar terms through observing the shadows of objects in the sun. The seasonal equator sundial is mainly applicable for the teaching of natural sciences in primary schools, the teaching of astronomy and geography in middle schools, etc. The seasonal equator sundial comprises a sundial surface 1 and a sundial needle 2, the sundial surface 1 appears as an annular disc, and the sundial needle 2 is vertically inserted in the center of the sundial surface 1. The seasonal equator sundial is characterized in that scales of traditional twelve two-hour periods and modern twenty-four hours are carved on the sundial surface 1, a movable meter 3 which is vertically arranged on the edge of the sundial surface 1 can rotate around the center of the sundial surface 1, and scales of twenty-four solar terms are arranged on the movable meter. The seasonal equator sundial can better help teachers explain and make students understood the principle and usage of the equator sundial which is an ancient astronomical instrument in China, and also can make up some disadvantages existing in prior equator sundials. The seasonal equator sundial has small volume, scientific design, portability, and accurate measurement, both time and solar terms can be measured, and the solar terms can be known as long as solar radiation is available.

Description

Time equator corona

Technical field:

The utility model relates to a kind of instrument of the shadow of observed objects in the sun.Particularly relate to a kind of time equator corona that comes acknowledging time, solar term by the shadow of observed objects in the sun.Mainly be applicable to the natural science teaching of primary school, the teaching of middle school astronomical geography etc.

Background technology:

At present, our tradition is used in the sun that the astronomical instrument of observed objects shadow mainly contains two kinds: a kind of is ancient Chinese sundial made of stones.Another kind of corona made of stones.Corona has face thing corona, horizontal corona and equator corona etc. again.

Ancient Chinese sundial is a kind of astronomical instrument of Ancient Times in China tolerance shadows cast by the sun length, is made up of " Gui " and " table " two parts.A normally upright bamboo pole or stone column 1 ' the observe variation of shadow on the level land, upright pole of this root or column just are called " table ", make Due South to the ruler of laying that is carved with scale mark 2 ' be called on " Gui " with slabstone, the North of Gui generally also upright have " a little table " 3 ', one of ruler connects the table base.As shown in Figure 1.Show shadow the positive period of the day from 11 a.m. to 1 p.m and throw on slabstone, ancients just can directly read the length value of table shadow, and know solar term according to length.

As the equator corona of distinct Chinese characteristics, be the instruments that clock of observation shadows cast by the sun, chief component is exactly the pointer 1 " and be sundial face 2 perpendicular to the projecting plane of pointer " of a projection sun shade.Sundial face 2 " on be carved with scale mark, as shown in Figure 2.The sundial face of equator corona is parallel with earth equatorial plane, and sundial pin directed north star is so there is this name.According to the position of pin shadow, with division of day and night of determining there and then or carve number.

Ancient Chinese sundial is to measure season, annual number of days according to the length of shadows cast by the sun, can calculate calendar etc., and corona is to know the time according to shadows cast by the sun.

The instrument that we observe season, solar term use generally is an ancient Chinese sundial made of stones.Domesticly only deposit several.Because its " Gui " keeps flat, and overlaps with the due south direct north, can survey tropic year, solar term with it.It just can predict solar term at noon the time.But the shadow according to ancient Chinese sundial can not predict the time.In the corona of observation time, wherein face thing corona and horizontal corona all are the time of can surveying can survey solar term again.As the equator corona of distinct Chinese characteristics, can only survey the time, can not survey solar term.

But their common shortcomings are: body is bigger, is stone material or other heavy materials and makes, and is generally official and uses, and involves great expense, and is fixing, not removable.

Summary of the invention:

The purpose of this utility model is at above-mentioned deficiency, provide a kind of can geodetic side's time, also can predict season, solar term, and volume time equator corona small and exquisite, easy to carry.

The purpose of this utility model is achieved in that equator corona of a kind of time, comprise sundial face and sundial pin, the sundial face is in the form of annular discs, the sundial pin vertically is inserted in sundial face center, be characterized in being carved with on the sundial face scale of the traditional twelve two time and the twenty four hours system in modern times, sundial face edge-perpendicular is provided with the trip table, the trip table rotates around sundial face center, be carved with the scale of the twenty-four solar terms above the trip table, this is to make according to the sun is parallel to the shadows of objects of the earth's axis in the tropic moving process of north and south movement law.

The sundial pin is equivalent to the table of ancient Chinese sundial, and the trip table is equivalent to the Gui or the little table of ancient Chinese sundial.Equator corona of this time combines the function of Ancient Times in China equator corona and ancient Chinese sundial, can geodetic side's time, also can predict season, solar term.

The utility model can help teacher to explain, allow the student understand Ancient Times in China the astronomical instrument principle and the using method of equator corona one by one better, and some shortcomings of existing equator corona have been remedied, volume is small and exquisite, design science, easy to carry, measure accurately, the time of promptly can surveying can be surveyed solar term again, promptly knows the place solar term as long as shine upon.

Fig. 1 is existing ancient Chinese sundial synoptic diagram.

Fig. 2 is existing equator corona synoptic diagram.

Fig. 3 is the front elevation of the utility model time equator corona.

Fig. 4 is the side view of the utility model time equator corona.

Embodiment:

As Fig. 3, the utility model is the equator corona of a kind of time.Mainly form by sundial face 1, sundial pin 2, trip table 3 and gauge stand 4.Sundial face 1 is in the form of annular discs, is carved with the scale of the traditional twelve two time and the twenty four hours system in modern times on the sundial face 1.Sundial pin 2 vertically is inserted in sundial face 1 center.Gauge stand 4 center place on the sundial pin 2.The trip table is carved with the scale of the twenty-four solar terms in the form of sheets above the trip table 3, trip table 3 is arranged at sundial face 1 edge, perpendicular to sundial face 1, links to each other with gauge stand 4 edges, and its length is that the twice of sundial pin 2 is many.

The utility model also can be without gauge stand, and directly offers chute at sundial face edge, and trip table one end is embedded in the chute, rotates around the sundial pin in chute.

Sundial face 1 can be two-sided, and it just, all there are traditional twelve two time and modern twenty four hours scale making in back of the body two sides.Numeral towards the south is design counterclockwise.Sundial needle penetration two sundial faces vertically are inserted in the front and back center of sundial face, 4 of gauge stands be folded in sundial face 1 just, between the back side.Trip table 3 is also established two accordingly, is vertically installed in the front and back edge of sundial face respectively, a shared gauge stand 4.

Sundial face 1 also can be a single face, and the scale of the traditional twelve two time and the twenty four hours system in modern times is carved with in its front clockwise.Sundial pin 2 can only expose north part up.Trip table 3 also has only up one, the front edge of sundial face 1 vertically is set, as Fig. 4.

Using method is as follows:

Characteristics according to the equator corona, the angle that tilts is laid the sundial face, the angle that tilts deducts local latitude for 90 °, and utilize compass make the sundial pin at the due south direct north, be parallel to the earth's axis, directed north star, can determine local time according to sundial pin shadow in the sun, traditional twelve two time and modern twenty four hours system all can contrast use; Any time that the sun is arranged as long as rotate the trip table, falls on the trip table shadow of sundial pin, and what the position of seeing shadow point place determined to belong to and saved what gas.The interior during this period of time shadow in the Autumnal Equinox to the Spring Equinox does not drop on the supine one side of sundial, can move the trip table yet, finds shadow, is certain about trip table center line, can find time line along center line.If sundial face down also has scale, its numeral, literal are to arrange counterclockwise, and that also can see what the pin shadow was fixed time.

Claims

1, a kind of time equator corona, comprise sundial face (1) and sundial pin (2), sundial face (1) is in the form of annular discs, sundial pin (2) vertically is inserted in sundial face (1) center, it is characterized in that being carved with on the sundial face (1) scale of the traditional twelve two time and the twenty four hours system in modern times, sundial face (1) edge-perpendicular is provided with trip table (3), and trip table (3) rotates around sundial face (1) center, is carved with the scale of the twenty-four solar terms above the trip table (3).

2, equator corona of a kind of time according to claim 1 is characterized in that being set with on the sundial pin (2) gauge stand (4), and trip table (3) links to each other with gauge stand (4).

3, equator corona of a kind of time according to claim 1 is characterized in that sundial face (1) edge offers chute, and trip table (3) one ends are embedded in the chute.

4, according to claim 1,2 or 3 described equator coronas of a kind of time, it is characterized in that sundial face (1) is two-sided, it just, all there is the scale of traditional twelve two time and modern twenty four hours system on back of the body two sides, trip table (3) also has two accordingly, is vertically installed in the front and back edge of sundial face (1) respectively.

5, equator corona of a kind of time according to claim 4, it is characterized in that gauge stand (4) be folded in sundial face (1) just, between the back side.

6, according to claim 1,2 or 3 described equator coronas of a kind of time, it is characterized in that sundial face (1) is a single face, the scale of the traditional twelve two time and the twenty four hours system in modern times is carved with in its front, and trip table (3) has one, and the front edge of sundial face (1) vertically is set.

7,, it is characterized in that trip table (3) length is that the twice of sundial pin (1) is many according to claim 1,2 or 3 described equator coronas of a kind of time.

8, equator corona of a kind of time according to claim 4 is characterized in that trip table (3) length is that the twice of sundial pin (1) is many.

9, equator corona of a kind of time according to claim 5 is characterized in that trip table (3) length is that the twice of sundial pin (1) is many.

10, equator corona of a kind of time according to claim 6 is characterized in that trip table (3) length is that the twice of sundial pin (1) is many.