Terrestrial latitude measuring instrument

Abstract

The invention discloses a terrestrial latitude measuring instrument. The instrument comprises a supporting frame, a rotating platform, a motor, a horizontal shaft, and a base which is fixedly connected with the supporting frame, wherein the horizontal shaft is supported on the supporting frame through a bearing; a speed reducer is connected to the motor and fixedly connected to the outer side of one end of the supporting frame; an output shaft of the speed reducer is fixedly connected with the horizontal shaft; an angle coder is arranged on the motor; the rotating platform is fixedly connected with the horizontal shaft; a shading barrel and nine light sensitive elements are arranged on the rotating platform; a through hole is formed in the top end of the shading barrel; a lens is mounted on the through hole; the nine light sensitive elements are distributed at the inside and outside of the shading barrel; a gradienter, a compass and a display are arranged on the base; the angle coder, the light sensitive elements, the motor and the display are all connected with a controller in the base. The instrument is simple in structure, reasonable in design, convenient to mount, fast to measure the local latitude, accurate and effect in measurement result, simple and convenient to operate, good in use effect, and high in popularization value.

Description

technical field [0001] The invention belongs to the field of measuring equipment, in particular to an earth latitude measuring instrument. Background technique [0002] At present, the teaching textbook introduces the method of measuring and calculating the local latitude by using the vertical pole measuring shadow algorithm. This method needs to measure the length of the vertical pole and the length of the shadow, and the result can only be obtained through trigonometric function calculations. The operation process is not convenient enough, and A large error will be caused due to human reasons, and when the sun is very low, the shadow of the pole is too long, and the image is blurred, so it is impossible to judge and measure the length of the shadow of the pole. Using a digital camera to measure latitude at night and using Polaris to measure latitude is very accurate, but the process is very cumbersome, and the latitude positioning is performed with the help of stars in the...

AI Technical Summary

Problems solved by technology

[0002] At present, the teaching textbook introduces the method of measuring and calculating the local latitude by using the vertical pole measurement shadow algorithm. This method needs to measure the length of the vertical pole and the length of the shadow, and the result can only be obtained through trigonometric function calculations. The operation process is not convenient enough, and Due to human reasons, there will be a lot of error, and when the sun is very low, the shadow of the pole is too long, and the image is blurred, so it is impossible to judge and measure the length of the shadow of the pole

Using a digital camera to measure latitude at night and using the Polaris to measure latitude is very accurate, but the process is very cumbersome, and all use the stars in the night sky for latitude positioning, so it is only suitable for night measurement

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