Sinusoidal wave demonstrating device with adjustable playing speed

Abstract

The invention discloses a sine wave demonstration device with adjustable playback speed, which comprises a fixing base, a rotation speed adjustment button and a waveform block. A working bin, and the inside of the working bin is provided with a storage bin, the inside of the storage bin is connected to the motor through a connecting shaft, and the motor is connected to the rotating shaft through a conveyor belt. Motor controller. In the present invention, first of all, a motor is provided inside the storage bin, and the motor is connected to the rotating shaft through a conveyor belt. There are multiple waveform blocks on the rotating shaft, and the multiple waveform blocks form a sine wave shape. Therefore, when the motor drives the rotating shaft to rotate, The rotation of the sine wave waveform can be displayed, so that students can better understand the movement of the sine wave waveform, and at the same time, it can better assist the teacher in explaining.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to a sine wave demonstration device with adjustable playback speed. Background technique [0002] A sine wave is a signal with the most single frequency component, so it is named because the waveform of this signal is a mathematical sine curve. Any complex signal—such as a music signal, can be regarded as a composite of many sine waves with different frequencies and sizes. We can set a function as y=sin X, when X is 0, 30, When 60, 90, 120, 150, 180 (unit: degree), the values ​​corresponding to Y are 0, 0.5, 0.8660, 1, 0.8660, 0.5, 0 respectively. Draw the corresponding point in the coordinate system to get the image of the sine wave. This image has a characteristic that it changes periodically. For example, when X=0, Y=0, and when X=180, Y=0; the opposite of (in the fourth quadrant). This is the image of a sine wave. [0003] Many students nowadays have difficulties...

AI Technical Summary

Problems solved by technology

[0003] Many students nowadays have difficulties in learning trigonometric functions. However, when teaching teachers explain sine wave waveforms, they just draw waveforms on PPT or blackboards for explanations, so students cannot understand them better, and they cannot understand them better. Therefore, it is still an important issue to develop a sine wave demonstration device for teaching to assist students in learning.

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