Free falling device based on electromagnetic induction coil and acclamation measurement method

Abstract

The invention discloses a free falling device based on an electromagnetic induction coil and an acclamation measurement method. The device comprises a control base, a wire column and a hollow column are arranged on the control base and provided with a first coil fixing device, a second coil fixing device and a third coil fixing device, and the first coil fixing device, the second coil fixing device and the third coil fixing device are internally provided with a first coil, a second coil and a third coil respectively; a fixing rack is arranged at the top of the hollow column, a button and a magnet exciting coil are arranged on the fixing rack, a magnet is arranged in the magnet exciting coil, an attraction sleeve is connected to the bottom of the magnet, and a steel ball is arranged in theattraction sleeve; the first coil, the second coil and the third coil are connected with a signal amplifier, the signal amplifier is connected with an A / D converter, the A / D converter is connected with the controller, and the controller is connected with a display screen, a timer and the button. According to the device, the acceleration of the steel ball during free falling can be measured, a numerical value is displayed, and the richness of a teaching experiment is improved.

Description

technical field [0001] The invention relates to the field of experimental teaching instruments, in particular to a free-fall device and an acceleration measurement method based on an electromagnetic induction coil. Background technique [0002] According to the basic theory of mechanics, it can be known that all objects near the earth, regardless of their mass and shape, are subject to the vertical downward attraction of the earth, which we call gravity. In physics, the object is only under the action of gravity, and the vertical downward motion with the initial velocity of zero is called free fall. However, due to the teaching method of the free fall of the object, the current teachers only show the steel ball in front of the students that the steel ball is moving uniformly under the gravitational force of the earth, but the students can only see the steel ball falling, but they cannot intuitively know the specific acceleration of the steel ball. Increased the limitations ...

AI Technical Summary

Problems solved by technology

However, due to the teaching method of the free fall of the object, the current teachers only show the steel ball in front of the students that the steel ball is moving uniformly under the gravitational force of the earth, but the students can only see the steel ball falling, but they cannot intuitively know the specific acceleration of the steel ball. Increased limitations of teaching experiments

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