spring serpentine pendulum
A technology of serpentine pendulum and spring vibrator, which is applied in the field of teaching and demonstration instruments, can solve the problems of stopping the swing, difficulty in achieving the same initial swing angle, difficulty in achieving visual effects, etc., and achieves the effect of convenient adjustment and stable vibration cycle
Inactive Publication Date: 2015-07-29
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] A simple pendulum with a pendulum angle less than 5° can be regarded as a simple harmonic vibration, but due to the influence of air resistance and other factors, a simple pendulum with a too small pendulum angle will soon stop swinging
In addition, since the pendulums that make up the serpentine pendulum have different pendulum lengths, it is difficult to achieve the same initial swing angle of each pendulum, and it is also difficult to achieve a better visual effect
Method used
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Embodiment Construction
[0024] Attached below Figure 1-3 The present invention will be further described.
[0025] Such as figure 1 , use stainless steel square tube or plexiglass to make a square frame 1, open 10-15 holes evenly under the beam of the frame, and open 10-15 through holes on the side of the beam corresponding to the position of the lower hole; install in the through hole Hand screw 2, set a perforation at the position corresponding to the lower hole of the screw rod of the hand screw, and wind the silk thread 3 on the screw rod of the hand screw through the perforation; the other end of the silk thread 3 passes through the hole under the beam and is bolted to one end of the spring 4 , the other end of the spring 4 is connected to the vibrator 5 through a wire.
[0026] In order to make the demonstration phenomenon of the spring pendulum more abundant, a set of photogates 6 and an electronic piano can be installed. The number of photogates is the same as that of the vibrators. Pass ...
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The invention provides an s-shaped spring pendulum, belongs to the field of science and education instruments, and relates to teaching demonstration instruments. The s-shaped spring pendulum is composed of a frame, 10 to 15 springs sand 10 to 15 vibrators. The s-shaped spring pendulum is characterized in that the springs are lined up and are hung on the frame at equal intervals through rigid hanging lines, the elastic coefficients of the springs are the same, and the lengths of the springs are the same; the vibrators are respectively hung on the springs, the weights of the vibrators enable the vibration periods of the springs to be increased or decreased evenly in sequence; the lengths of the hanging lines are adjustable, and the vibrators are adjusted to be at the same height. The vibrators vibrate at the same time and in the uniform amplitude, the vibratos form various shapes, and the shapes formed by the vibrators change regularly. The elastic coefficients of the springs and the weights of the vibrators are chosen properly, and thus the s-shaped spring pendulum can return to an original position in a short time. The s-shaped spring pendulum can demonstrate interesting vibration combination phenomena and reveal mathematic regularities.
Description
technical field [0001] The invention belongs to the field of teaching instruments, and relates to a teaching demonstration instrument. Background technique [0002] The serpentine pendulum is a vibration formation formed by a series of vibrators with different frequencies on the same equilibrium position line. The current serpentine pendulum is composed of several pendulum balls with different periods at the same height, which are arranged in a straight line at equal intervals. Each pendulum has different periods, but there is a constant frequency difference between adjacent pendulums. , the relative position between pendulum balls will change periodically. [0003] A simple pendulum with a pendulum angle less than 5° can be regarded as a simple harmonic vibration, but due to the influence of air resistance and other factors, a simple pendulum with a too small pendulum angle will soon stop swinging. In addition, since the pendulums constituting the serpentine pendulum have...
Claims
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IPC IPC(8): G09B23/10
Inventor 刘凤艳卢海涛陈向枭杨旭东刘敏蔷王越
Owner BEIJING UNIV OF TECH