CN201297931Y

CN201297931Y - Simple sun-shadow compass

Info

Publication number: CN201297931Y
Application number: CN 200820218795
Authority: CN
Inventors: 崔喜权
Original assignee: Angang Group Mining Co Ltd
Current assignee: Angang Group Mining Co Ltd
Priority date: 2008-10-31
Filing date: 2008-10-31
Publication date: 2009-08-26
Anticipated expiration: 2018-10-31

Abstract

The utility model relates to technique field of a non-magnetic north-seeking device, especially relates to a simple sun-shadow compass. The utility model is characterized by comprising an index dial, a solar azimuth angle meter, a front collimation, a rear collimation, a centre hole of the index dial and a sun-shadow pointer needle. Wherein the solar azimuth angle meter is arranged on the card of the index dial, the front collimation is arranged at the top end of a longitudinal axis of the index dial, the rear collimation is arranged at the bottom end of the longitudinal axis of the index dial, the centre hole is arranged at the center of the index dial, and the sun-shadow pointer needle is inserted into the center hole of the index dial. The sun-shadow pointer needle comprises a pointer needle seat, a pointer needle connected with the pointer needle seat and a pointer needle clamp spring arranged at the joint of the pointer needle seat and the pointer needle. The utility model overcomes the error that the magnet needle of the compass occurs to indication bias caused by interference of local magnetic field. The utility model has the advantages of convenient carrying and simple and convenient operation.

Description

A kind of simple and easy shadows cast by the sun compass

Technical field

The utility model relates to the northern device technique of non magnetic finger field, particularly a kind of simple and easy shadows cast by the sun compass.

Background technology

Compass is the greatness invention of ancient Chinese, also is the basic observation instrument of military affairs, navigation, geology, exploring indispensability.Compass also is north arrow, and it is to suspend or the needle of slight drag very with one, and because of this needle is attracted to deflect by the magnetic field of the earth, an end is guide side all the time, and the other end then refers to the north.We can say that it indicates the North and South direction of terrestrial magnetic pole accurately.Looking for north with compass, take one's bearings to people and brought convenience, is more also more convenient method efficiently of usefulness.Compass also can be because of strong magnetic environment, indicates the mistake that departs from as the influence of the large-scale converting equipment of underground magnetic iron ore etc.

The sun is the most reliable " north arrow " as everybody knows.In order to overcome influence of magnetic field, people utilize the annual fixedly recurrent mutation rule of the sun, a GPRS some time somewhere solar rays movement law on the ground, just can determine the direction in geographical north, make shadows cast by the sun compass not affected by magnetic fields.Defectives such as the shadows cast by the sun box compass is the indispensable instrument of iron ore mine field geological work, and still currently used shadows cast by the sun box compass exists accessory more, and use is complicated, should not carry.

Summary of the invention

The purpose of this utility model is to overcome the defective that currently used shadows cast by the sun box compass exists, and provides a kind of usable range a kind of simple and easy shadows cast by the sun compass wide, easy to carry, easy and simple to handle.Can utilize solar azimuth to calculate real north in the geomagnetic anomaly zone, overcome north arrow and the mistake that indication departs from takes place because of local magnetic field disturbance makes needle.

A kind of simple and easy shadows cast by the sun compass of the present utility model, it is characterized in that by scale, be located at the red azimuth table on the card of this scale, be located at this scale longitudinal axis top before sight, be located at this scale longitudinal axis bottom after sight, be located at the scale center pit at this scale center, the shadows cast by the sun pointer that is inserted in this scale center pit is formed.

Described shadows cast by the sun pointer is by hand rest, the pointer that is connected of hand rest therewith, and the pointer jump ring that is located at this hand rest and pointer junction is formed, and this pointer jump ring and pointer are perpendicular.

Described red azimuth table is by outer toroid 360 degree scales, in the scale by 12 equidistantly distribute isocentric circular arc month scale mark and therewith isocentric circular arc month the radially small time taking line that intersects of scale mark formed.

Sight before described and after sight with described scale and be rotatably connected.

Adopt a kind of simple and easy shadows cast by the sun compass of the present utility model, according to sun recurrent mutation rule, the earth is in the motion of rotation and revolution, constitute 23 ° 26 ecliptic obliquity, because ecliptic obliquity does not change with the change of earth revolution time and orbital position, so it has determined that subsolar point plying between the tropic of north and south is mobile.GPRS solar azimuth Changing Pattern during the somewhere, just can determine the direction in geographical north according to the projection of sunray on ground level.Solar azimuth is meant projection and the local meridianal angle of sunray on ground level, can regard as approx to be erected at ground straight line shade in the sun and positive northern angle.

Solar azimuth is a definite value during annual somewhere, can calculate or actual measurement be tried to achieve by formula.Make the time and the solar azimuth conversion table in different months, and the time and the solar azimuth conversion table in different months is integrated on the scale.According to shadows cast by the sun position angle and solar azimuth value here and now, determine the direction in north.And then try to achieve the orientation of observation station.

The shadows cast by the sun box compass is usually used in measuring the point-to-point transmission measurement of azimuth.The method is measured direction, consider the local time difference, Beijing time should be converted into local time.

Because of the latitude difference, certain solar azimuth constantly is also different, and therefore, different latitude should be selected corresponding red azimuth table.Can not use in the tropic of Cancer (23 ° 27 ' of the north latitude) areas to the south of China summer.

One, measures orientation α.During use compass needle seat 6 is connected the jump ring 7 vertical fixing pointers vertical with pointer with compass center pit 3.With shadows cast by the sun compass horizontal, shadows cast by the sun pointer 8 is erect, sight before erecting 4 and after sight 5, and aim at measured object (point) with it, sight (0 ° of point, 180 ° of points), shadows cast by the sun pointer 8, measured point point-blank before and after making.Observation pointer 8 is projected in the reading β value on the scale 1.According to month and observation time (will consider the local time difference, Beijing time should be converted into local time), in the red azimuth table 2 on being integrated in scale, search corresponding solar azimuth γ value, the azimuth angle alpha=β+γ of measured object (point) again.The γ value has just to be had negatively, and on the occasion of for adding, negative value is for subtracting.When the α value less than 0 the time, the α value adds 360; When the α value greater than 360 the time, the α value subtracts 360.

Two, measure inclination angle δ.Put the shadows cast by the sun compass is perpendicular, shadows cast by the sun compass limit (90 ° of one side) is close to measured object, and compass needle jump ring 7 is connected with compass center pit 3, and shadows cast by the sun pointer 8 can winding degree disk center 3 freely rotate, when shadows cast by the sun pointer 8 is vertical, and the reading Ω value on the pointer 8 sensing scales 1.Measured object inclination angle δ=Ω-90.

The utility model has overcome compass and because of local magnetic field disturbance makes needle the mistake that indication departs from has taken place.Easy to carry, easy and simple to handle.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of simple and easy shadows cast by the sun compass of the present utility model, it is characterized in that by scale, be located at the red azimuth table on the card of this scale, be located at this scale longitudinal axis top before sight, be located at this scale longitudinal axis bottom after sight, be located at the scale center pit at the center of this scale, the shadows cast by the sun pointer that is inserted in this scale center pit is formed.

Claims

1, a kind of simple and easy shadows cast by the sun compass, it is characterized in that by scale, be located at the red azimuth table on the card of this scale, be located at this scale longitudinal axis top before sight, be located at this scale longitudinal axis bottom after sight, be located at the scale center pit at the center of this scale, the shadows cast by the sun pointer that is inserted in this scale center pit is formed.

2, a kind of simple and easy shadows cast by the sun compass according to claim 1, it is characterized in that: described shadows cast by the sun pointer is by hand rest, the pointer that is connected of hand rest therewith, the pointer jump ring that is located at this hand rest and pointer junction is formed, and this pointer jump ring and pointer are perpendicular.

3, a kind of simple and easy shadows cast by the sun compass according to claim 1, it is characterized in that: described red azimuth table is by outer toroid 360 degree scales, in the scale by 12 equidistantly distribute isocentric circular arc month scale mark and therewith isocentric circular arc month the radially small time taking line that intersects of scale mark formed.

4, a kind of simple and easy shadows cast by the sun compass according to claim 1 is characterized in that: sight before described and after sight with described scale and be rotatably connected.