Parachute working principle demonstrating device

Abstract

The invention relates to a parachute working principle demonstrating device, which comprises a base, a circular concave groove, an LED light band, a fan, a horizontal circular hole, a speed adjusting rotation button, a vertical circular hole, an electric control plate, a direct current power source, a cylindrical glass container, a parachute model, a counterweight object, and a support pin. The base is of a cylindrical shape. The top panel edge is designed with the circular concave groove used to place the cylindrical glass container. The fan is connected with the electric control plate through the conductive wire. The electric control plate is connected with the fan switch and the direct current power source through the conductive wire. The parachute face of the parachute model is made from thin plastic cloth, and the parachute lines are connected with the counterweight object below. According to the invention, when the fan switch is turned on and the speed adjusting rotation button is adjusted, the demonstration wind force increases, the parachute model rises and finally, the parachute model stays still in the air; in addition, the device can also demonstrate that when the gravity of the counterweight object is reduced, the parachute model rises to a stable balanced state finally. Beyond that, the fact that the height of the parachute model varies according to the wind speeds can also be demonstrated.

Description

technical field [0001] The invention relates to a scientific teaching aid, in particular to a demonstration device for the working principle of a parachute. Background technique [0002] In the science courses of primary and middle schools, it will involve imparting the knowledge of the working principle of the parachute. The traditional teaching method is to explain its working principle with molecular kinetic theory knowledge by watching pictures, and it is impossible for students to watch how the parachute works stably at close range. This cannot cultivate students' observation ability and practical ability, especially explaining how the wind speed changes, the counterweight changes, and how the parachute moves. It is difficult for students to understand the relevant knowledge without personal experience, so it is necessary to invent a working principle of the parachute Demonstration device. Contents of the invention [0003] In order to overcome the deficiencies of th...

AI Technical Summary

Problems solved by technology

[0002] In the science courses of primary and middle schools, it will involve imparting the knowledge of the working principle of the parachute. The traditional teaching method is to explain its working principle with molecular kinetic theory knowledge by watching pictures, and it is impossible for students to watch how the parachute works stably at close range. This cannot cultivate students' observation ability and practical ability, especially explaining how the wind speed changes, the counterweight changes, and how the parachute moves. It is difficult for students to understand the relevant knowledge without personal experience, so it is necessary to invent a working principle of the parachute Demonstration device

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