Swing mechanism demonstration instrument and demonstration method thereof

Abstract

The invention discloses a swing mechanism demonstration instrument and a demonstration method thereof. The swing mechanism demonstration instrument comprises a base, wherein two pairs of supporting rods are installed on the base; a first cross beam for fixing an angle sensor is connected to the tops of one pair of supporting rods, a track display screen is mounted on the inner side of the bottom, and a second cross beam with a fixed pulley on the top is connected to the other pair of supporting rods; a rotating shaft with a fixed pulley is rotationally mounted between the two cross beams, a first swing rod and a second swing rod which are identical are connected to the rotating shaft, and a horizontal swing plate is mounted at the lower ends of the two swing rods; an angle pointer is mounted on one side of the swing plate; a weight bracket and a weight which can slide up and down are sleeved on the two swing rods; one side of the weight is connected with a connecting rod used for mounting a track drawing pen; the top of the weight bracket is hooked with a traction rope which passes through the two fixed pulleys, is wound on a driving wheel of a stepping motor and is used for lifting the weight; and the angle sensor and the stepping motor are connected with a controller. The demonstration instrument demonstrates swing playing method of squatting at a high position and standing at a low position, the influence of different parameters on swing playing and the difference between the different parameters and resonance.

Description

technical field [0001] The invention belongs to the field of teaching instruments and equipment, and in particular relates to a swing mechanism demonstration instrument and a demonstration method thereof. Background technique [0002] Swinging is a traditional folk sport. The method of swinging is to "squat high and stand low", that is, squat down quickly when the swing reaches the highest point, and stand up quickly when the swing reaches the lowest point; the functional principle of swinging It can be explained that the limbs of the human body make the body's center of mass move up and down according to the above rhythm to do work, transforming the internal energy of the human body into the mechanical energy of the system, making the swing higher and higher; the swing movement is physically described as parametric self-excited vibration. [0003] The Chinese utility model patent whose notification number is CN203677919U discloses a swing simulation device based on self-exc...

AI Technical Summary

Problems solved by technology

[0004] The swing devices in the above-mentioned patents only focus on showing the phenomenon that the swing becomes higher and higher, but do not explore the state and law of swing movement, the principle of swing and the mechanism of energy conversion in physics teaching, and the effects of various parameters on the swing. Influence, the difference between self-excited vibration and resonance of parameters, and how to eliminate self-excited vibration, these more theoretical and practical contents are the focus of attention

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