JP2010256898A - Coriolis force verification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for clearly showing the Coriolis force with a small and simple structure. <P>SOLUTION: The device is so constituted that a disk-like article in which a hole is located in the center and a circular tube opened both ends is attached to the hole so that the upper side is long and the lower side is short and circumference edge is vertically bent downward, is horizontally installed in a horizontally set circular water tank slightly away from the bottom, and water is gently poured in the water tank so that a layer of air is formed under the disk-like article until the water comes above the upper end of the tube. In this state, by applying heat to the inside of the tube, a slow flow is generated between the bottom of the water tank and the disk-like thing from the side face side toward the center. By suitably preparing a structure wherein one end of a thread is tied to an object slightly lighter than the specific gravity of water and the other end of the thread is fixed to the bottom, the direction of the flow is detected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a Coriolis force verification apparatus.

  Foucault pendulum is an example of Coriolis' power.

Foucault pendulums must be large in order to keep moving for a long time against air resistance.
In other methods, it is said that a very large and precise device is required to verify the Coriolis force.

  An object of the present invention is to realize a device having a small and simple structure and clearly showing Coriolis force.

  The Coriolis force verification device of the present invention is a disk in which a circular cylinder having a hole in the center and open at both ends is attached so that the upper side is long and the lower side is short, and the circumferential end is bent vertically downward Place the water in a circular water tank placed horizontally, slightly away from the bottom, and gently place the water until the water level is above the top of the cylinder so that an air layer is formed on the lower side of the disk. In this state, by applying heat to the inside of the cylinder, a gentle flow from the side surface toward the center is generated between the bottom surface of the water tank and the disk-shaped one, and is slightly more than the specific gravity of water. A structure in which a thread is tied to a light object and the other end is fixed to the bottom is appropriately provided so that the flow direction can be detected.

  Since the Coriolis force verification apparatus of the present invention can achieve its purpose even on a small scale, it can be used as teaching materials in educational institutions.

  The Foucault pendulum rotates gradually in the direction of shaking, but its speed is slow and it takes a long time to observe, but the Coriolis force verification device of the present invention can detect the position of the object that detects the flow direction. You can immediately check the power of Coriolis.

  The Coriolis force verification apparatus according to the present invention makes water move in the same way as the atmosphere in a tropical cyclone, and this is also suitable as a science teaching material.

  Side sectional view showing an embodiment of the present invention   Plan view of partition plate support plate   Plan view of partition plate support   Side sectional view of partition plate support and flow direction detection object

  Hereinafter, embodiments of the Coriolis force verification apparatus of the present invention will be described with reference to examples.

  FIG. 1 is a side sectional view showing an embodiment of the Coriolis force verification apparatus of the present invention.

  When the water in the cylinder 7 is warmed by the heater 8, the water expands, and the expanded water is discharged from the upper side of the cylinder 7. Since the water inside the cylinder 7 is lighter than the water outside the cylinder 7, the water pressure inside the cylinder 7 is lower on the lower side of the cylinder 7, and water enters the cylinder 7 from the lower side of the cylinder 7. As a result, a gentle flow from the side surface toward the center occurs between the partition plate support plate 3 and the partition plate 2.

  This flow is hardly affected by the movement of air outside the aquarium. The only Coriolis force works, and in the northern hemisphere, it shifts slightly to the right in the direction of travel.

  When the thread 5 is tied to the object 6 slightly lighter than the specific gravity of water and the other end is fixed to the partition plate support 4, the object 6 floats on the water between the partition plate support plate 3 and the partition plate 2 and is in the same direction as the water. Shows the direction of water movement.

DESCRIPTION OF SYMBOLS 1 Water tank 2 Partition plate 3 Partition plate support plate 4 Partition plate support part 5 Yarn 6 Object slightly lighter than specific gravity of water 7 Tube 8 Heater 9 Weight 10 Air layer

Claims (1)

  A circular cylinder with a hole in the center and a circular cylinder with both ends open so that the upper side is longer and the lower side is shorter, and the circular end is bent vertically downward. Place the water tank in a horizontal position slightly away from the bottom surface, and gently inject water until the water level is above the upper end of the cylinder so that an air layer is formed on the lower side of the disk shape. By applying heat to the inside, a gentle flow from the side to the center is generated between the bottom of the aquarium and the disc-shaped object, and the other end is tied to a thread slightly lighter than the specific gravity of water. A verification device that can clearly indicate the Coriolis force by providing a structure that is fixed to the bottom so that the flow direction can be detected.

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