CN2187821Y

CN2187821Y - Normal vibration curve display instrument

Info

Publication number: CN2187821Y
Application number: CN 94224110
Authority: CN
Inventors: 王美霞
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-11
Filing date: 1994-07-11
Publication date: 1995-01-18
Anticipated expiration: 2004-07-11

Abstract

The utility model relates to a demonstrating instrument for the curve of simple harmonic vibration. A toothed rack 3 and a connecting rod 1 can respectively drive a vibrator 10 to carry out the simple harmonic vibration and the uniform motion in a straight line. After two motions are combined, the standard curve of the simple harmonic vibration is available. The period, the amplitude and the initial phase of the curve all can be adjusted. The utility model can be used for the teaching of physics in middle schools, and can also be used for the teaching of physics and trigonometry in universities.

Description

Normal vibration curve display instrument

The utility model relates to a kind of instruments used for education, particularly a kind of simple harmonic oscillation figure line demonstrator.Also can be described as the plotting apparatus of a kind of sine or cosine figure line.

Demonstration teaching aid about the simple harmonic oscillation figure line, existing now many, these demonstrators mostly possess two cover kinematic systems, and a cover is the Harmonic Vibration System of pen, another set of is the linear uniform motion system of paper, two cover systems move simultaneously, can obtain the figure line of simple harmonic oscillation, and this teaching aid has 2 deficiencies, at first, have only and two cover kinematic systems to cooperate quite accurately, just can obtain the simple harmonic oscillation figure line of standard, and this point is difficult to realize; Secondly, utilize the resulting figure line of above-mentioned demonstrator, just perception ground is illustrated in the sine of simple harmonic oscillation figure line or cosine in face of the student, can only observe the size in amplitude and cycle on scheme, but can't judge the size of initial phase, let alone the adjustability of amplitude, cycle, initial phase, therefore, above-mentioned teaching aid can only be used for the teaching of middle school physics, and can not be used for College Physics and trigonometric teaching.

One of the purpose of this utility model is will overcome in the prior art, owing to two cover kinematic systems cooperate out of true to cause the non-type shortcoming of figure line to design a kind of simple harmonic oscillation figure line demonstrator that can accurately map.

Another purpose of the present utility model is will overcome the shortcoming that prior art can not complete embodiment simple harmonic oscillation three elements and design a kind of three elements fully can being illustrated in face of the student, and makes it adjustable simple harmonic oscillation figure line demonstrator.

The utility model is to realize above-mentioned purpose as follows.The utility model has been cancelled the kinematic system of paper, has kept the kinematic system of pen.The motion of pen is driven by sliding bar 1 and tooth bar 3.When sliding bar 1 slides on main guide rail 2, promptly drive nib 11 and do linear uniform motion, meanwhile, tooth bar 3 drives the gear 5 at sliding bar two ends, gear 5 drives nib 11 by phase place bar 7 and link rod 8 again and does simple harmonic oscillation, synthesizing of two motions can be the simple harmonic oscillation figure line that obtains a standard on the paper at drawing board 13 just, just sinusoidal line or cosine line.Say especially, no matter sliding bar 1 is a uniform motion on main guide rail 2, or variable motion, its figure line all will be the sinusoidal line or the cosine line of standard.By adjustment, can obtain the different simple harmonic oscillation figure line of cycle, initial phase and amplitude to tooth bar 3, phase place bar 7 and link rod 8.

Below in conjunction with accompanying drawing the utility model is described further.

Fig. 1 the utility model structural drawing

A-A view among Fig. 2 Fig. 1

Among the figure: 1. sliding bar, 2. main guide rail, 3. tooth bar, 4. main support, 5. gear heap, 6. index dial, 7. phase place bar, 8. link rod, 9. pair support, 10. oscillator, 11. nibs, 12. pairs of guide rails, 13. drawing boards, 14. belt pulleys, 15. handles, 16. nuts.

Main guide rail 2 and tooth bar 3, be installed in abreast on the main support 4, the installation site of its middle rack 3 is adjustable, sliding bar 1 can slide on main guide rail, respectively there is gear heap 5 at the two ends of sliding bar 1, gear heap 5 is to be formed by stacking by several gears, adjust tooth bar 3, can make it mutually meshing with the last different gear of gear heap, below the gear heap is index dial 6, radially installation phase place bar 7 along index dial, its installation site is adjustable, two phase place bar 7 usefulness link rods 8 connect, and its coupled position is adjustable, and there is the support 9 of paying in the central authorities of sliding bar 1, the guide rail 12 of paying is arranged on it, it is orthogonal to pay guide rail and main guide rail, and oscillator 10 can slide along paying guide rail, and link rod 8 is made guide rail shape, and it is enclosed within on the oscillator 10, so oscillator can slide along link rod 8 again, be nib 11 below the oscillator, nib has elasticity, make it and drawing board 13 between keep-up pressure, paying on the support 9 has a nut 16, by adjusting nut 16, a pair support 9 is moved up, and then control nib 11, itself and drawing board are separated, on the gear heap belt pulley 14 and handle 15 are arranged, rotate but shake handle driven gear heap.Concrete presentation process is: when the demonstration simple harmonic oscillation, should make rack and pinion from, at the uniform velocity shake handle again, under the drive of link rod 8, oscillator will be done simple harmonic oscillation along a pair guide rail; When demonstration vibration figure line, should make rack and pinion mutually meshing, spur sliding bar again, at this moment nib will be with its associated movement, and meanwhile, the rack drives gear rotates, and then make link rod drive the oscillator motion, and oscillator has participated in two motions, and the track of its resultant motion will appear vividly on drawing board.Adjust tooth bar and make it mutually meshing, can change the cycle of figure line with different gears; Adjust the phase place bar along the orientation on the index dial, can change the initial phase of figure line; Adjust the coupled position of link rod on the phase place bar, can change the amplitude of figure line.

The utility model has the advantage of:

1. simple to operate, need only slowly spur sliding bar 1, can obtain at drawing board the simple harmonic oscillation figure line of a width of cloth standard.

2. cycle, initial phase, the amplitude of vibration figure line are adjustable, by the adjustment to the vibration three elements, can greatly improve the student to the degree of understanding of vibration three elements.

3. this teaching aid is not only applicable to the teaching of Middle School Physics, and is applicable to College Physics and trigonometric teaching, and it is physical teaching aid, is again mathematics teaching aid, and as seen its scope of application is very wide.

Claims

1, the utility model relates to a kind of teaching aid, particularly a kind of simple harmonic oscillation figure line demonstrator, and this demonstrator is made up of main guide rail 2, main support 4, tooth bar 3 and sliding bar 1, it is characterized in that sliding bar 1 and main guide rail 2 are slidingly connected, and main guide rail parallels with tooth bar.

2, simple harmonic oscillation figure line demonstrator according to claim 1, the two ends that it is characterized in that sliding bar 1 have gear heap 5, index dial 6 are arranged below the gear heap 5, along index dial 6 phase place bar 7 radially arranged, the two phase place bar is linked by link rod 8.

3, simple harmonic oscillation figure line demonstrator according to claim 1, the central authorities that it is characterized in that sliding bar 1 are by having the guide rail 12 of paying on nut 16 connection pair supports 9, pair support, and paying on the guide rail has oscillator 10.

4, according to claim 1 and 3 described simple harmonic oscillation figure line demonstrators, it is vertical mutually with main guide rail 2 to it is characterized in that paying guide rail 12.

5,, it is characterized in that link rod 8 is guide rail shape, and it is enclosed within on the oscillator 10 according to claim 2 and 3 described simple harmonic oscillation figure line demonstrators.

6, simple harmonic oscillation figure line demonstrator according to claim 2 is characterized in that also having belt pulley 14 and handle 15 on the gear heap 5.