Measuring method of locus measuring apparatus based on LED luminous pendulum ball

Abstract

The invention provides a locus measuring apparatus based on an LED luminous pendulum ball and a measuring method thereof. The apparatus is composed of a suspended LED luminous pendulum ball and a digital camera. The LED luminous pendulum ball is a metal ball, an axis of the ball is provided with a large through hole and a small through hole which are penetrated through, the small through hole is at bottom and is provided with an LED, and a cell, a resistor and a lead are in the large through hole. A suspension hook at a hanging cover center is fixed by a large hole port with screw fixing and is bolted with a pendulum line, another end of the pendulum line is fixed at a ceiling or a support, and the luminous pendulum ball which is embedded with an LED and related devices inside is formed and a center of gravity and a motion state of the metal ball are not influenced. The digital camera is placed under the metal ball and is used for shooting and recording various swing loci of the LED luminous pendulum ball under different initial velocity conditions and sending a shot image to a PC machine for storage and processing so as to observe and analyze the motion loci of the LED luminous pendulum ball. The locus measuring apparatus has the characteristics of a simple structure and convenient operation, a simple physical phenomenon can be accurately reproduced, a motion locus of sphere pendulum is recorded, and the apparatus has good popularization application prospect.

Description

technical field [0001] The present invention relates to a single pendulum track measuring device with a novel structure and its measuring method, more precisely, it relates to a track measuring device and its measuring method based on an LED luminous pendulum ball, which belongs to the physics teaching experimental equipment and experimental method of colleges and universities. technology field. Background technique [0002] Simple gravitational pendulum and conical pendulum are commonly used vibration models in the teaching of physics experiments in colleges and universities. In the teaching practice of physics experiments in colleges and universities, when the large angle, tangential initial velocity, damping and no external driving force are comprehensively considered, the movement of the pendulum ball is more complicated, not the movement in the vertical plane or the movement of the conical pendulum , but a two-dimensional swing on a spherical surface, usually called a ...

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Problems solved by technology

[0005] However, there is no good experimental equipment or technical means at home and abroad so far, which can collect the corresponding data of the two-dimensional motion state of the pendulum ball. analyze it theoretically

As for whether this theoretical model and analysis are in line with the actual situation, and what are the factors that affect the movement of the swing ball, at present, it can only be judged by observing the experimental phenomena with the naked eye, and there is a lack of a practical experimental device or trajectory measurement device.

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