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Fluctuation demonstrator

A technology of a demonstrator and a DC motor, applied in the field of wave demonstrators, can solve the problems of cumbersome structure, inability to demonstrate standing waves, etc., and achieve the effect of simple structure

Inactive Publication Date: 2019-06-25
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the classroom teaching demonstrations of fluctuations are still demonstrated by mechanical methods. The structure is not only cumbersome, but also cannot demonstrate standing waves. The present invention provides a wave demonstration instrument with the function of demonstrating standing waves.

Method used

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  • Fluctuation demonstrator
  • Fluctuation demonstrator

Examples

Experimental program
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Effect test

Embodiment Construction

[0011] exist figure 1 Among them, from the bulb installation port of the flashlight 1 with the lampshade removed, two wires 2 are drawn out to connect to the DC motor 4, and the feature is that an eccentric hammer 3 is installed on the rotating shaft of the DC motor 4, and the DC motor 4 is fixed on the elastic slat 5, and the elastic plate One end of the bar 5 is welded to the front end of the flashlight 1, the other end is connected to the elastic band 6, the other end of the elastic band 6 is connected to the sliding ball 10, the sliding ball 10 is threaded on the vertical sliding rod 9, and the bolt 11 is screwed on the sliding ball 10, The slide bar 9 is fixed on the bow support 8 on the base 7 .

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Abstract

A fluctuation demonstrator is composed of a flashlight, wires, an eccentric weight, a direct-current motor, an elastic batten, an elastic band, a base, an arched bracket, a sliding bar, a sliding balland a bolt. A dry battery in the flashlight supplies power to the direct-current motor, the eccentric weight on a rotating shaft of the direct-current motor makes the free end of the elastic batten vibrate, energy is transmitted to the sliding ball sleeving the sliding bar through the elastic band, and the fluctuation characteristics are demonstrated; when the sliding ball is fixed to the slidingbar through the bolt, a standing wave form can appear on the elastic band.

Description

technical field [0001] The invention relates to a wave demonstration instrument, in particular to a wave demonstration instrument with the function of demonstrating standing waves. Background technique [0002] At present, most of the demonstrations in the classroom teaching of fluctuations are still demonstrated by mechanical means. The structure is not only cumbersome, but also cannot demonstrate standing waves. The present invention provides a wave demonstration instrument with the function of demonstrating standing waves. Contents of the invention [0003] The technical problem to be solved by the present invention is: to provide a wave demonstration instrument, the dry battery in the flashlight supplies power to the DC motor, and the eccentric hammer on the shaft of the DC motor makes the free end of the elastic slats vibrate, and the energy is transmitted to the sleeve through the elastic band. The sliding ball on the rod demonstrates the wave feature. When the slidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/06
Inventor 卢春燕
Owner NANJING POLYTECHNIC INSITUTE