CN2708431Y

CN2708431Y - A day night ruler

Info

Publication number: CN2708431Y
Application number: CN 200320125880
Authority: CN
Inventors: 封琢; 常晓静
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-17
Filing date: 2003-12-17
Publication date: 2005-07-06
Anticipated expiration: 2013-12-17

Abstract

Disclosed is a day night ruler which relates to a teaching aid. The day night ruler not only can detect the sunrise time and the sunset time of a certain place or detect the latitude and the longitude of the stayed place according to the sunrise time and the sunset time in the stayed place, but also can perform particular presentations to the organic relations between time zone, longitude, latitude, solar term and time. The utility model is composed of a longitude time zone disk, a time disk, a latitude and terminator disk and a dial which are in overlapping in turn and are in rotary connection with the center of circle as the shaft. The longitude time zone disk is rotated, making the centerline of the time zone of the place which is to be tested aligns with the 12 o'clock of the time disk. Then the two disk are rotated together, which makes the longitude degree of the place which is to be tested is over against the central axis. The dial is rotated, making the indicating line intersect with the terminator of a certain solar term by the latitude line of the detected place. The readings of the indicating line at the left of the central axial line on the time disk are the sunrise time and at the right are the sunset time of the some solar time to the detected place, and the central axial line is towards the noon time.

Description

Day night ruler

Technical field:

The present invention relates to a kind of teaching aid.Particularly a kind of day night ruler.

Background technology:

Day alternates with night is the rule of the Nature invariability, and it makes the rhythmic work of human mater all things on earth, has a rest life, growth.But length round the clock is not unalterable, change along with changes of seasons, as; Winter, days are short and nights long, and summer, the days are long and the nights short, when up to the spring and fall equinoxes solar term, and equinox length.In addition, length round the clock is not only relevant with season, and is also relevant with the latitude that is located in.As seen, sunrise sunset, length is decided by time and space round the clock, that is to say, is to be determined by the rotation of the earth and the resultant motion of two motions of revolution.

At present, time zone in the teaching, longitude, latitude, solar term, the organic connections between the time still can't specifically be demonstrated.

Summary of the invention:

The utility model aims to provide a kind of day night ruler.It not only can measure the sun set/raise time in somewhere, or measures the longitude and latitude at place according to the sun set/raise time of locating ground, can also be for the time zone, and longitude, latitude, solar term, the organic connections between the time are specifically demonstrated.

The utility model comprises the longitude time zone disc, time disk, latitude and morning and evening drum, needle dial, and be axle with the center of circle, superimposed successively, be rotationally connected, as shown in Figure 1.Wherein, the longitude time zone disc is a circular discs, on card, is axle with the center line, evenly indicates 12 time zone lines on each circumference of thing.Time disk is a disk, evenly indicates 24 hour lines on the circumference of card.Latitude and morning and evening drum be a disk, card is marked with latitude circle and terminator; Latitude circle is several concentric circless, and radius is respectively the cosine of equatorial radius * latitude number, is polar circle with the cylindrical, is that 1 solid line is round every 10 °, is 1 broken circle every 5 °; Begin to be provided with to the center of circle latitude circle of 6 colours from polar circle, its radius is respectively the complementary angle number of the declination number of 24 solar term; Terminator be 12 semiellipse lines with 1 by the center of circle line segment vertical with central shaft, the terminator that these 13 lines are 24 solar term is the projection on the plane under the line, indicates the solar term title respectively.Needle dial is a transparent plate, is carved with cursor line along the needle dial radius.

Terminator of the present utility model also can indicate and the corresponding date of solar term.

Longitude time zone disc of the present utility model can be considered as the equator great circle of the earth; 24 hours of time disk is diel; Latitude and morning and evening the drum sign terminator projection on the plane under the line of the projection on the plane and 24 solar term under the line of the latitude line on the earth southern hemisphere and northern hemisphere; Cursor line on the needle dial is the longitude time zone disc, time disk, and the time zone on latitude and the morning and evening drum, longitude, latitude, solar term, the time organically connects, and reflects the Changing Pattern of the part space-time of the earth and the sun objectively.

Using method of the present utility model is:

1, rotate time the aliging of zone centerline and time disk that the longitude time zone disc will be treated geodetic at 12 o'clock, rotate this two dishes then together, make treat geodetic through the number of degrees over against the axis;

2, the rotating pointer dish, make cursor line by treating geodetic latitude line and the terminator joining of certain solar term, at this moment, the reading of cursor line on time disk axis left side for to treat certain solar term of geodetic at sunrise, cursor line is to treat certain solar term of geodetic at sunset the right side, axis, and what the axis faced toward is the positive period of the day from 11 a.m. to 1 p.m.

In sum, the utility model is a kind of day night ruler.It not only can measure the sun set/raise time in somewhere, or measures the longitude and latitude at place according to the sun set/raise time of locating ground, can also be for the time zone, and longitude, latitude, solar term, the organic connections between the time are specifically demonstrated.

Description of drawings:

Fig. 1 is the utility model synoptic diagram.

Among the figure: 1-longitude time zone disc, the 2-time disk, the 3-latitude and morning and evening drum, 4-cursor line, 5-time zone line, 6-hour line, 7-latitude circle, 8-terminator.

Embodiment:

Measure sunrise, sunset and the positive period of the day from 11 a.m. to 1 p.m in the Tianjin Limit of Heat with the utility model.

The time zone that Tianjin is located in is Dong8Qu, east longitude 117 degree, north latitude 39 degree.

Rotate the longitude time zone disc and alignd in eastern 8 zone centerline 12 o'clock with time disk, rotate this two dishes then together, east longitude 117 is spent over against the axis; The rotating pointer dish, make cursor line pass through the joining in north latitude 39 degree and the terminator in Limit of Heat left side, at this moment, the reading of cursor line on time disk is 5: 34, for day in the Tianjin Limit of Heat at sunrise between, the rotating pointer dish, make cursor line pass through the joining on north latitude 39 degree and the terminator right side in the Limit of Heat, at this moment, the reading of cursor line on time disk is 18: 50, for the day of day in the Tianjin Limit of Heat has no time, identical substantially after the empirical tests with People's Republic of China's lifting flag time.

It not only can measure the sun set/raise time in somewhere, or measures the longitude and latitude at place according to the sun set/raise time of locating ground, for the time zone, and longitude, latitude, solar term, the organic connections between the time are specifically demonstrated, and improve teaching efficiency.

Claims

1, a kind of day night ruler is characterized in that it comprises the longitude time zone disc, time disk, latitude and morning and evening drum, needle dial, and be axle with the center of circle, superimposed successively, be rotationally connected; Wherein, the longitude time zone disc is a circular discs, on card, is axle with the center line, evenly indicates 12 time zone lines on each circumference of thing; Time disk is a disk, evenly indicates 24 hour lines on the circumference of card; Latitude and morning and evening drum be a disk, card is marked with latitude circle and terminator; Latitude circle is several concentric circless, and radius is respectively the cosine of equatorial radius * latitude number, is polar circle with the cylindrical, is that 1 solid line is round every 10 °, is 1 broken circle every 5 °; Begin to be provided with to the center of circle latitude circle of 6 colours from polar circle, its radius is respectively the complementary angle number of the declination number of 24 solar term; Terminator be 12 semiellipse lines with 1 by the center of circle line segment vertical with central shaft, the terminator that these 13 lines are 24 solar term is the projection on the plane under the line, indicates the solar term title respectively; Needle dial is a transparent plate, is carved with cursor line along the needle dial radius.

2, according to the described day night ruler of claim 1, it is characterized in that sign and corresponding date of solar term on the terminator.