Teaching aid for demonstration for arc length between two points with different spherical latitudes and longitudes

Abstract

The present invention discloses a teaching aid for demonstration for an arc length between two points with different spherical latitudes and longitudes. The teaching tool comprises a support structure, a connection mechanism and a measurement mechanism. The measurement mechanism comprises uniformly distributed support longitude lines, support parallel lines and an upper supporting seat, a second support bar is fixedly installed on the connection mechanism, the other end of the second support bar is located at the centre of the sphere of a semi-spherical holding cavity, the end portion of the second support bar is connected with a third support bar through a spherical pair, a sector measuring ruler is fixedly installed at the other end of the third support bar, and the arc-shaped end face of the sector measuring ruler is pasted to the spherical surface of the semi-spherical holding cavity. The teaching aid for demonstration for the arc length between two points with different spherical latitudes and longitudes can rapidly measure the arc length between two points located at the spherical surface to save the calculation time, allow children or pupils to more visually feel the arc length between the two points located at the spherical surface and the straight length between the two points located at the spherical surface, greatly improve the demonstration efficiency of the spherical surface arc length and enhance the students' understanding to the course lines.

Description

technical field [0001] The invention relates to a teaching aid, in particular to a teaching aid for demonstrating the arc length between two points with different latitude and longitude on a spherical surface. Background technique [0002] In the current teaching system of early childhood or elementary school education, in many cases, students cannot personally participate in it, resulting in a lot of knowledge that cannot be vividly passed on to students, such as the determination of aircraft routes. At present, the existing aircraft flight process demonstrations are basically displayed through pictures or audio-visual materials, and the images displayed through video materials are all in two-dimensional pictures or video modes, which makes it difficult for young children or primary school students to intuitively understand the trajectory principle of aircraft routes. In fact, the flight path of an airplane is the spherical distance connecting two points on a certain sphere...

AI Technical Summary

Problems solved by technology

However, in the prior art, at least the above two data need to be measured, and then the calculation can be performed to determine the length of the arc between two points on the spherical surface. Therefore, it is not convenient to measure the length of the line between two points on the spherical surface by using the prior art. technical issues of the process

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