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A kind of standing wave experimental device and experimental method

An experimental device and standing wave technology, applied in the field of standing wave experimental devices for physical experiments, can solve problems such as poor repeatability, inability to observe standing wave phenomena, and non-persistence.

Active Publication Date: 2022-04-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The instrument is simple and the demonstration time is not long-lasting, relying on artificial movement to generate the standing wave formation process, the repeatability is poor; due to structural design defects, when the observer's line of sight is on the same plane as the motor shaft, the standing wave phenomenon will not be observed

Method used

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  • A kind of standing wave experimental device and experimental method
  • A kind of standing wave experimental device and experimental method
  • A kind of standing wave experimental device and experimental method

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Embodiment 1

[0107] Such as figure 1 and figure 2 As shown, this embodiment 1 describes a standing wave experimental device, which includes a vibration source 1, a horizontal slide rail 2, a horizontal scale 3, a sliding seat 4 with a slit knife edge, a string 5 and a string tension test mechanism.

[0108] Wherein, both the vibration source 1 and the string tension testing mechanism are located on the horizontal slide rail 2, and the two are respectively located at the opposite ends of the horizontal slide rail 2, for example figure 2 The left and right ends of the horizontal slide rail 2 shown in .

[0109] The function of the vibration source 1 is to generate incident waves. The incident waves generated by the vibration source 1 are divided into two identical paths. There are two output ports of the vibration source 1, which are respectively defined as 6a and 6b. Each incident wave passes through a Output output.

[0110] Such as image 3 and Figure 4 As shown, the vibration so...

Embodiment 2

[0197] like Figure 13 As shown, this embodiment 2 describes an experimental method for verifying the standing wave formula experiment, which is implemented based on the standing wave experimental device mentioned in the above embodiment 1. The experimental method will be described in detail below.

[0198] According to the wave theory, the wave equation between the parameters of the standing wave on the string is:

[0199]

[0200] Among them, λ is the standing wave wavelength, f is the standing wave frequency, μ is the linear density of the string, and T is the tension of the string.

[0201] like figure 1 Two reflection mechanisms with different structures are provided in , which are respectively the reflection mechanisms where the string 5a and the string 5b are located.

[0202] In the reflection mechanism where the string 5a is located, the incident wave with a frequency of f is reflected by the slit edge 21 to form a reflected wave, and the incident wave and the r...

Embodiment 3

[0212] like Figure 14 As shown, this embodiment 3 describes an experimental method for studying the establishment conditions of the wave equation, which is realized based on the standing wave experimental device mentioned in the above embodiment 1. The experimental method will be described in detail below.

[0213] According to the derivation theory of the one-dimensional wave equation, only when the disturbance of the wave on the string is very small, and the additional elongation of the string caused by the disturbance can be ignored compared with the original elongation due to the tension in the string, The wave equation can only be established.

[0214] This precondition is not mentioned in the prior art, and there is no relevant experiment to verify the supporting effect of this condition on the theory.

[0215] In this embodiment, the vibration source 1 is provided with an amplitude adjustment knob 13, which can set the amplitude of fluctuation.

[0216] By using the...

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Abstract

The invention discloses a standing wave experimental device and an experimental method, wherein the standing wave experimental device includes a vibration source, a horizontal slide rail, a horizontal scale, a sliding seat with a slit knife edge, a string, a string tension testing mechanism and a wave Overlay parts such as demo units. Wherein, both the vibration source and the string tension testing mechanism are located on the horizontal slide rail, and are respectively located at opposite ends of the horizontal slide rail. The invention can not only accurately measure the tension of the string, but also fine-tune the tension of the string, and can provide the real-time change curve of the tension of the string when the wave propagates on the string. The experimental method of the present invention includes the experimental method of verifying the standing wave formula, the experimental method of verifying the condition that the wave equation is established, the experimental method of the comparative experiment of studying the influence of different reflection mechanisms on the reflected wave amplitude, and the experimental method of demonstrating the superposition process of two columns of waves Methods, through the above experimental methods, to meet the teaching requirements of a variety of physical experiments.

Description

technical field [0001] The invention relates to a standing wave experimental device for physical experiments and an experimental method based on the device. Background technique [0002] Fluctuation is a common form of material motion, such as mechanical waves, electromagnetic waves, light waves, etc. all belong to fluctuations. [0003] Although they are not the same in nature, they all have the common characteristics of fluctuations, that is, they all have a certain propagation speed, and they are all accompanied by the propagation of energy. Both of them can produce phenomena such as interference and diffraction, and they have similar mathematical expressions. [0004] Standing wave is a special kind of mechanical wave, which is a special interference phenomenon formed by the superposition of two columns of coherent waves with the same amplitude, frequency and propagation speed propagating in opposite directions on the same straight line. [0005] At present, string stan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/06
CPCG09B23/06
Inventor 苗永平刘维慧代坤魏军英梁润泽
Owner SHANDONG UNIV OF SCI & TECH
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