Three-wire pendulum for electromagnetic-controlled devices with oscillation angle

Abstract

The invention discloses a type of three-wire pendulum for electromagnetic-controlled devices with oscillation angel. The device includes a three-wire pendulum, a support, and a magnetic absorber, an electromagnetic chunk, and power supply. The magnetic absorber is fixed at the surface center of a disc below the three-wire pendulum. It includes the suspension wires of a magnetic suction head and a hanging magnetic suction head. The electromagnetic chunk is located right below the magnetic absorber; it consists of a base and a conductive magnetic head. Inside the base is a field coil, the power supply and the base are connected to supply electricity for the field coil. The present invention is simple in structure and easy to use; it can precisely control the oscillation angle of the three-wire pendulum, which is good for experiment operations and the precise measuring of rotation inertia.

Description

technical field [0001] The invention relates to a moment of inertia measuring instrument, in particular to a three-wire pendulum with a pendulum angle electromagnetic control device. Background technique [0002] The three-wire pendulum is a common mechanical experiment instrument for measuring the moment of inertia of objects. It is generally composed of an upper disc, a lower disc and three suspension wires connecting the upper disc and the lower disc. The lower disc is used to place the object to be measured. The change of the rotation period of the three-wire pendulum before and after the object to be measured is used to measure the moment of inertia of the object to be measured. During the experiment, the disc under the three-wire pendulum is required to swing at a small angle, and the swing angle does not exceed 5°. However, none of the existing three-wire pendulums has a swing angle control device, resulting in the inability to accurately control the swing angle of t...

AI Technical Summary

Problems solved by technology

However, none of the existing three-wire pendulums has a swing angle control device, which leads to the inability to accurately control the swing angle of the lower disk. Many students will have a swing angle greater than 50° during the experiment, which increases the experimental error.

In addition, if you want to stop the three-wire pendulum from swinging during the experiment, you can only block the lower disc with your hands, which brings inconvenience to the experimenter.

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