CN2336429Y - Sidereal day and solar day demonstration board - Google Patents
Sidereal day and solar day demonstration board Download PDFInfo
- Publication number
- CN2336429Y CN2336429Y CN 98236015 CN98236015U CN2336429Y CN 2336429 Y CN2336429 Y CN 2336429Y CN 98236015 CN98236015 CN 98236015 CN 98236015 U CN98236015 U CN 98236015U CN 2336429 Y CN2336429 Y CN 2336429Y
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Abstract
The utility model relates to a sidereal day and solar day demonstration board, which is composed of a drawing board, marks, a connecting rod, a driving gear wheel, etc. Two parallel through slots are arranged on the drawing board; a sun model is arranged between the two through slots; the lower part of the drawing board is provided with an earth model and a model slot; the earth model is provided with a gear wheel which is cooperated with the fan-shaped gear wheel of the back of the drawing board; the earth model and the sun model are connected together through the connecting rod; the earth model can slide on the connecting rod; the top of the connecting rod is provided with fixed star marks. The utility model can demonstrates the earth, the sun, fixed stars and running tracks thereof on the demonstration board. The utility model can clearly demonstrate the difference between the solar day and the sidereal day by simulating the autorotation of the earth.
Description
The utility model relates to a kind of instruments used for education, particularly a kind of sidereal day of demonstrating sidereal day and solar day and difference on solar day and solar day demonstrator.
In geographical teaching, to relate to the problem on sidereal day and solar day.The earth rotation tour, the required time is 23: 56: 4, and this is called the sidereal day, i.e. and in the double time interval through upper transit of a certain fixed star of sky, this is the real cycle of earth rotation.One day 24 hours is the double time interval through upper transit of the sun, is called a solar day.Since earth rotation the time also around the day revolution, one solar day the earth wanted three-sixth turn 59 minutes, than the sidereal day more 59 minutes, so the more 3 minutes 56 seconds time interval than the sidereal day.The teaching process middle school student sidereal day and solar day are not familiar with owing to having intuitively, accept the comparison difficulty, usually influence teaching process.
The purpose of this utility model provide a kind of can know the demonstration sidereal day and solar day difference sidereal day and solar day demonstrator.
The purpose of this utility model be achieved in that a kind of sidereal day and solar day demonstrator, comprise chart board 1, sign, connecting rod 2 and transmission gear, above chart board 1, be provided with a groove 3, chart board 1 below is provided with earth model 6, be provided with the groove 4 parallel in earth model 6 and groove 3 midpoint with groove 1, be provided with solar model 5 between two grooves, also being provided with solar model 5 on the chart board 1 is the center of circle, distance is the deep-slotted chip breaker 7 of radius between solar model 5 and the earth model 6, earth model 6 is provided with gear 8 and matches with the sector gear 9 at the chart board back side, earth model 6 is connected by line 10 with solar model 5 and connects, earth model 6 fixed star signs 11 connect by connecting rod 2, earth model 6 can slide on connecting rod 2, and fixed star sign 11 is located at the top of connecting rod 2.
Sidereal day provided by the utility model and solar day demonstrator, the earth, the sun, fixed star and running orbit thereof are shown demonstrator, and can simulate the rotation of the earth, in the difference of clearly demonstrating on the demonstrator between solar day and sidereal day.
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the utility model schematic diagram.
Fig. 3 is the utility model gear structure synoptic diagram.
Structure of the present utility model is: a kind of sidereal day and solar day demonstrator, comprise chart board 1, sign, connecting rod 2 and transmission gear, above chart board 1, be provided with a groove 3, chart board 1 below is provided with earth model 6, be provided with the groove 4 parallel in earth model 6 and groove 3 midpoint with groove 1, be provided with solar model 5 between two grooves, also being provided with solar model 5 on the chart board 1 is the center of circle, distance is the deep-slotted chip breaker 7 of radius between solar model 5 and the earth model 6, earth model 6 is provided with gear 8 and matches with the sector gear 9 at the chart board back side, earth model 6 is connected by line 10 with solar model 5 and connects, earth model 6 fixed star signs 11 connect by connecting rod 2, earth model 6 can slide on connecting rod 2, and fixed star sign 11 is located at the top of connecting rod 2.
When the utility model is made, get one of 400mm * 260mm * 3mm sheet material material, make chart board 1, draw the sidereal day and solar day synoptic diagram.Earth model is gone up point topmost and is decided to be the P point.As SE1 among Fig. 2 is 200 millimeters, is that center of circle picture arc obtains a camber line with S; The M point is taken at the mid point of NE1, draws NN ' and is parallel to MM '.With NN ' and MM ' scrape out wide 3 millimeters groove chart board.Load onto radius at the back side of chart board 1 and be 185 millimeters sector gear 9, it is that 15 millimeters gear 8 matches with radius on the earth model 6.2 one ends of connecting rod are loaded onto fixed star sign 11 (being made into the five-pointed star shape), and the other end is loaded onto earth model 6, and pack into two parallel channels, 3,4 internal fixation of chart board 1 of connecting rod 2 are good, and the gear 8 on the earth model 6 is worked good with sector gear 9.On chart board 1
When the utility model uses, adjust connecting rod 2, line 10 and earth model 6 are to chart board 1 left side, make connecting rod 2, line 10, earth model 6 threes in a straight line, slide link 2 to the right, drive earth model 6 and move along track, earth model 6 rotation (being expressed as northern ball) counterclockwise under the driving of sector gear 9 again, connecting rod 2 is being with fixed star sign 11 with earth model 6 parallel moving simultaneously.Arrived the E2 place, earth model 6 is 360 degree from circling, and connecting rod 2 projections just overlap with the P point.Continue to slide into the E3 place again, line 10 projections ring and could overlap with the P point.At this moment line projection is 59 minutes a angle with formed one in the projection of E2 place in theory, forms this angle earth need rotation 3 minutes and 56 seconds, Here it is solar day the reason longer than time sidereal day.
Claims (1)
1, a kind of sidereal day and solar day demonstrator, comprise chart board (1), sign, connecting rod (2) and transmission gear, it is characterized in that: be provided with a groove (3) in chart board (1) top, chart board (1) below is provided with earth model (6), be provided with the groove (4) parallel in earth model (6) and groove (3) midpoint with groove (1), be provided with solar model (5) between two grooves, also being provided with solar model (5) on the chart board (1) is the center of circle, distance is the deep-slotted chip breaker (7) of radius between solar model (5) and the earth model (6), earth model (6) is provided with gear (8) and matches with the sector gear (9) at the chart board back side, earth model (6) is connected by line (10) with solar model (5) and connects, earth model (6) fixed star sign (11) connects by connecting rod (2), earth model (6) can be gone up at connecting rod (2) and slide, and fixed star sign (11) is located at the top of connecting rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98236015 CN2336429Y (en) | 1998-06-30 | 1998-06-30 | Sidereal day and solar day demonstration board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98236015 CN2336429Y (en) | 1998-06-30 | 1998-06-30 | Sidereal day and solar day demonstration board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2336429Y true CN2336429Y (en) | 1999-09-01 |
Family
ID=33984169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98236015 Expired - Fee Related CN2336429Y (en) | 1998-06-30 | 1998-06-30 | Sidereal day and solar day demonstration board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2336429Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686223A (en) * | 2019-02-02 | 2019-04-26 | 吉林师范大学 | The simulation comparison unit on solar day and sidereal day |
-
1998
- 1998-06-30 CN CN 98236015 patent/CN2336429Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686223A (en) * | 2019-02-02 | 2019-04-26 | 吉林师范大学 | The simulation comparison unit on solar day and sidereal day |
| CN109686223B (en) * | 2019-02-02 | 2024-03-01 | 吉林师范大学 | Simulation comparing device for sun day and sun day |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |