Double electromagnetism spot instrument-based standing wave experiment demonstrator

A dual electromagnetic and demonstrator technology, applied in instruments, educational appliances, teaching models, etc., can solve problems such as small size, inability to describe waveform characteristics in language, and students without personal experience, to avoid rote memorization.

Pending Publication Date: 2017-08-11
郭金虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Patent No. 200910045097.7 discloses a wall-mounted standing wave demonstration board, which can solve the problem of students calling out one, two, or three standing waves during class time. It is interactive and small in size, and is suitable for students to use. How many standing waves can be produced by elastic ropes of the same length and made of different materials? The students can’t answer, so it is necessary to invent a standing wave demonstration and comparison device, and there is no such comparison device on the

Method used

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  • Double electromagnetism spot instrument-based standing wave experiment demonstrator

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Example 1, such as figure 1 As shown, a standing wave experimental demonstrator based on a double electromagnetic inking device is composed of a vibration source left box body 1, a right box body 2, a pair of cylindrical support rods 3, a rope body, a student power supply 20, and a variable frequency power supply 21. It is characterized in that it also includes electromagnetic dot timer A4, electromagnetic dot timer B5, electromagnetic dot timer C6, electromagnetic dot timer D7, power cord 8, switch A9, switch B10, switch C11, switch D12, and electromagnetic dot timer E13, switch E14, signal reflection level adjustment rod 15, rope A16, rope B17, rope C18, rope D19, claw nut 22, vertical fixing plate 23, fixing part A24, fixing part B25;

[0013] The left box body 1 of the vibration source is seen as an "L" shaped box structure from the front side, and four electromagnetic ticking timers are horizontally and parallelly installed on the upper surface of the hollow box-sh...

Embodiment 2

[0016]Embodiment 2, connect student power supply 20, open switch A9 and switch E14; Keep the operating frequency 50Hz of electromagnetic dotting timer A4 constant, by adjusting the frequency knob, the frequency of variable frequency power supply 21 is changed between 45-55Hz, namely When the vibration frequency of the dotting needle of the electromagnetic dotting timer E13 changes between 45-55Hz, it will be observed that the standing wave waveform on the rope A16 is unstable and changes with time; further research will find that when the electromagnetic dotting timer E13 When the operating frequency of the rope is also 50Hz, a stable standing wave can be formed, which is convenient for the teacher to explain the two waves propagating along the rope. A stable standing wave waveform is obtained.

[0017] The beneficial effects of the present invention are as follows: (1) Turn on the power supply, turn on the four switches on the left box body 1 of the vibration source, use elas...

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PUM

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Abstract

The invention relates to a double electromagnetism spot instrument-based standing wave experiment demonstrator which comprises a left box body and a right box body of a vibration source, a pair of cylindrical support rods, a rope body, a power supply for a student, a variable-frequency power supply, five electromagnetic ticker timers, five switches and a signal reflecting level adjusting rod, wherein the left box body of the vibration source is of an L-shaped box structure, and four electromagnetic ticker timers are arranged on the upper surface of the left box body of the vibration source; and the right box body is also of an L-shaped box structure, and one electromagnetic ticker timer E powered by the variable-frequency power supply of which the frequency is adjustable between 1Hz and 100Hz is arranged on the upper surface of the right box body. The double electromagnetism spot instrument-based standing wave experiment demonstrator has the beneficial effects that (1) the standing wave experiment demonstrator is capable of assisting in understanding the relationship among a wave velocity, a frequency and a wavelength through comparing standing waves on four ropes; and (2) when the frequency of one electromagnetic ticker timer is kept invariable and the frequency of another electromagnetic ticker timer changes, stable standing waves can be formed only if the two electromagnetic ticker timers are the same in frequency, thereby understanding a superposition principle of the waves.

Description

technical field [0001] The invention relates to a standing wave demonstration device, in particular to a standing wave experiment demonstration device based on double electromagnetic inkers. Background technique [0002] Patent No. 200910045097.7 discloses a wall-mounted standing wave demonstration board, which can solve the problem of students calling out one, two, or three standing waves during class time. It is interactive and small in size, and is suitable for students to use. How many standing waves can be produced by elastic ropes of the same length and made of different materials? The students can’t answer, so it is necessary to invent a standing wave demonstration and comparison device, and there is no such comparison device on the market. That is, there is no device for demonstrating the superposition of standing waves by two electromagnetic dotting timers of different or the same frequency in the physical laboratory equipment of middle school at present. When the f...

Claims

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Application Information

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IPC IPC(8): G09B23/14
CPCG09B23/14
Inventor 刘茜邹文萱周逸龙
Owner 郭金虎
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