CN2590095Y

CN2590095Y - Standing wave demonstrating device for teaching

Info

Publication number: CN2590095Y
Application number: CN 02251191
Authority: CN
Inventors: 徐云友
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-13
Filing date: 2002-12-13
Publication date: 2003-12-03
Anticipated expiration: 2012-12-13

Abstract

The utility model relates to a standing wave demonstrating device for teaching. The utility model is used for the physics teaching in a high school. The utility model is composed of a box body 7, weights 1, a pulley support frame 2, a string 3, a blocking plate 4, a dot type timer 5 and a power supply for students 6. The demonstrating device has the advantages of reasonable design, simple structure, simple fabrication and convenient usage. Through the utility model, a standing wave and a formed process of the standing wave can be visually and directly demonstrated. A better teaching effect can be obtained.

Description

Teaching Standing wave demonstration device

Technical field: the utility model relates to a kind of apparatus for demonstrating that physics teaching is used that is used for.

Technical background: standing wave and formation thereof are important contents in the senior middle school physics teaching.So far for a long time, owing to lack instrument or the teaching aid that to demonstrate standing wave and formation aspect thereof visually, the Physical Education Teacher can only self-dependent experience with students and ability to express very explained arduously, it is also very painstaking that the student pays attention to the class, digests this top knowledge, thereby teaching efficiency is a greater impact.

Summary of the invention: the purpose of this utility model is to provide a kind of can the convenience and demonstration visually, thereby makes the student can comparatively fast grasp the teaching Standing wave demonstration device of standing wave and formation knowledge thereof.

The utility model is to realize like this.This kind demonstration device is made up of casing, counterweight, pulley bracket, cord, baffle plate, dotted timer, student's power supply, the box top left end is provided with a pulley bracket, the right side is provided with dotted timer, be provided with a cord between pulley bracket and the dotted timer, cord one end is connected with the pin that shakes on the dotted timer, another end span is walked around pulley, and the lower end connects hangs a counterweight; The positive inboard of casing be provided with one with the perpendicular baffle plate of end face, student's power supply is housed in the casing, be connected with lead between power supply and the dotted timer.During use, connect student's power switch, electric current promptly reaches dotted timer by lead, the sheet that shakes on it drives the pin up-down vibration of shaking, and the ripple that shakes that sends is propagated left by cord, is then propagated to the right by the train wave that pulley reflects, like this, two train waves of propagating to the right are superimposed left, promptly form standing wave, and the size of wave amplitude can be regulated by the weight that changes counterweight.

The utility model is reasonable in design, and is simple in structure, is easy to make, easy to use, utilizes it can demonstrate the process of standing wave and formation thereof visual in imagely, obtains good teaching effective, is suitable for and applies.

Description of drawings: Fig. 1 is a structural representation of the present utility model.Fig. 2 is the dotted timer structural representation.

Embodiment: enforcement of the present utility model is illustrated below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model is made up of counterweight 1, pulley bracket 2, cord 3, baffle plate 4, dotted timer 5, student's power supply 6 and casing 7.Wherein, dotted timer 5 (see figure 2)s are made up of base plate 8, the pin 9 that shakes, the sheet 10 that shakes, permanent magnet 11, coil 12 and binding post 13, and the sheet 10 that shakes adopts the rectangle scale copper.Student's power supply 6 adopts present physics laboratory low-voltage alternating current power supply commonly used, the alternating current about output 6V.Counterweight 1 can adopt common laboratory to weigh and use counterweight, also can adopt weight, and about weight 20 grams, cord 3 adopts white cord, and baffle plate 4 and box top platform are black, also can stick black paper, so that vibrating effect is more obvious.Casing 7 is the rectangle box-shaped body of long 800-1000mm, wide 200mm, high 300mm.

Claims

1, a kind of teaching Standing wave demonstration device, form by counterweight (1), pulley bracket (2), cord (3), baffle plate (4), dotted timer (5), student's power supply (6) and casing (7), it is characterized in that, casing (7) end face left end is provided with a pulley bracket (2), the right side is provided with dotted timer (5), be provided with a cord (3) between pulley bracket (2) and the dotted timer (5), cord (3) one ends are connected with the pin that shakes on the dotted timer (5), another end span is walked around pulley, and a counterweight (1) is hung in the lower end; The positive inboard of casing (7) be provided with one with the perpendicular baffle plate (4) of end face, student's power supply (6) is housed in the casing, be connected with lead between power supply (6) and the dotted timer (5).

2, teaching according to claim 1 Standing wave demonstration device is characterized in that, dotted timer (5) is made up of base plate (8), the pin that shakes (9), the sheet that shakes (10), permanent magnet (11), coil (12) and binding post (13).