CN204010437U - Standing wave demonstrating instrument - Google Patents
Standing wave demonstrating instrument Download PDFInfo
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- CN204010437U CN204010437U CN201420436769.3U CN201420436769U CN204010437U CN 204010437 U CN204010437 U CN 204010437U CN 201420436769 U CN201420436769 U CN 201420436769U CN 204010437 U CN204010437 U CN 204010437U
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- vibrating mass
- standing wave
- erecting frame
- wave
- contiguous block
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Abstract
Standing wave demonstrating instrument, comprises base, is arranged at erecting frame on described base, is fixed on the buncher on described erecting frame, and the contiguous block that vibrating mass is installed moves up and down under the drive of described buncher, thereby one end of described vibrating mass is vibrated; On described erecting frame, be provided with the synchrodrive part being connected with the motor shaft of described buncher, described synchrodrive part comprises a pair of transmission shaft and a pair of synchronizing wheel, on the transmission shaft of described synchrodrive part, be provided with crank connecting link, the lower end of described crank connecting link is connected with contiguous block, and described vibrating mass is arranged on described contiguous block; On described erecting frame, be provided with the guide rail of lateral arrangement, on described guide rail, being provided with can be along the running fix folder of described guide rail transverse shifting, and the described shear wave vibrating mass of described running fix folder clamping is away from one end of contiguous block.The utility model can be demonstrated transverse stationary wave and longitudinal stationary wave, and standing wave frequency can manually adjust, and facilitates teacher to carry out class demonstration, and has advantages of simple in structure.
Description
Technical field
The utility model belongs to teaching and experiment equipment technical field, relates in particular to a kind of for demonstrating the experimental apparatus of various standing wave phenomenas.
Background technology
When vibration frequency, amplitude and direction of vibration are identical, have the constant two row simple harmonic waves that differ, while propagating along contrary direction, the ripple forming after two train wave stacks is standing wave.Standing wave is the very common a kind of phenomenon of occurring in nature, trembles etc. such as ripples, musical instrument sounding, treetop; Before seashore cliff or vertical type hydraulic structure, though do in time cyclical upturn and downturn near near seawater face cliff, it is back and forth mobile that seawater is, but do not propagate forward, the water surface is level substantially, Here it is owing to being subject to the restriction of bulkhead wall, incident wave and reflection wave superposeed mutually and form the result of standing wave.
In Experiment of College Physics chamber, the demonstration of standing wave is mainly contained to three kinds of modes: 1) mechanical excitation method, comprising two classes, a class is traditional electrically driven tuning fork method; Another kind of is displacement of the lines mechanical oscillation method.These two kinds methods the most frequently used while being laboratory demonstration standing wave.2) electromagnetic exciting method, to tinsel energising, the online lower magnet of placing, excitation energising tinsel, produces vibration, as vibration source.3) magnetoelectricity advocate approach, tinsel no power, the online lower coil of placing, produces excitation field, produces vibration, as vibration source.
Publication number is that 102314787 Chinese invention patent application discloses a kind of Novel standing wave demonstration instrument, there is frame, in frame, be fixed with direct current generator, on the output shaft of direct current generator, disk is installed, disk is provided with minor axis, and T shape cutting ferrule is suspended on described minor axis, T shape cutting ferrule can be moved up and down by guide pin bushing constraint, there is an aperture lower end of T shape cutting ferrule, and one end of vibrating mass is fixed on described aperture, and the other end hangs weight.When machine operation, the motor of uniform rotation drives T shape cutting ferrule to do simple harmonic motion by disk, thereby vibrating mass is vibrated together, produces standing wave phenomena.But between the disk of this standing wave demonstrating instrument and vibrating mass, be to carry out transmission by T shape cutting ferrule, T shape cutting ferrule is connected with the minor axis being arranged on disk, easily there is card in the transmission in motion process between T shape cutting ferrule and minor axis, bumpy motion, stable wave source cannot be provided, can have influence on the observation of standing wave phenomena.Meanwhile, the vibrating mass of the shear wave of this demonstrator is to be connected with counterweight by pulley, utilizes fixedly one end of vibrating mass of counterweight, easily cause precession phenomenon interference experiment effect, parts are more in addition, and need to install can hanging counterweight device, take larger space.
Summary of the invention
For above deficiency, the purpose of this utility model is to provide a kind of simple in structure, the standing wave demonstrating instrument that can demonstrate multiple standing wave phenomena.
To achieve these goals, the utility model is taked following technical solution:
Standing wave demonstrating instrument, comprise: base, be arranged at erecting frame on described base, be fixed on the buncher on described erecting frame, the contiguous block that vibrating mass is installed moves up and down under the drive of described buncher, thereby one end of described vibrating mass is vibrated, in vibrating mass, produce standing wave; On described erecting frame, be provided with the synchrodrive part being connected with the motor shaft of described buncher, described synchrodrive part comprises a pair of transmission shaft and a pair of synchronizing wheel, on the transmission shaft of described synchrodrive part, be provided with crank connecting link, the lower end of described crank connecting link is connected with contiguous block, described vibrating mass is arranged on described contiguous block, and described vibrating mass comprises shear wave vibrating mass and compressional wave vibrating mass; On described erecting frame, be provided with the guide rail of lateral arrangement, on described guide rail, being provided with can be along the running fix folder of described guide rail transverse shifting, and the described shear wave vibrating mass of described running fix folder clamping is away from one end of contiguous block.
A kind of improvement as the utility model standing wave demonstrating instrument, described synchrodrive part is a pair of pitch wheel, active synchronization wheel is arranged on the motor shaft of described buncher, passive and synchronous wheel by bearing is fixed on erecting frame, the upper end of a crank connecting link is connected with the power axle of active synchronization wheel, and the upper end of another root crank connecting link is connected with passive and synchronous power axle of taking turns.
As a kind of improvement of the utility model standing wave demonstrating instrument, described compressional wave vibrating mass below hangs counterweight.
A kind of improvement as the utility model standing wave demonstrating instrument, is provided with limited block on described erecting frame, and described limited block is positioned at described crank connecting link below, is provided with the stopper slot that can pass for described contiguous block on described limited block.
As a kind of improvement of the utility model standing wave demonstrating instrument, described compressional wave vibrating mass is spring.
As a kind of improvement of the utility model standing wave demonstrating instrument, described shear wave vibrating mass is elasticity tightrope.
As known from the above, the utility model adopts buncher that different vibration frequencies are provided, motor is connected and is driven contiguous block as wave source by crank connecting link, the motor shaft connecting crank connecting rod in the vertical direction moving in a circle is projected as to simple harmonic oscillation, using the wave source of this simple harmonic oscillation as standing wave, by synchrodrive part, carry out transmission simultaneously, obtain two or more variable same frequency vibrations source as different elastic medium standing wave wave source contrast demonstrations, below contiguous block, can be used for realizing longitudinal stationary wave demonstration by linking springs, connect elasticity tightrope and realize transverse stationary wave demonstration, can carry out different elastic mediums, demonstration in the time of the different summation rules of medium of the same race and variety classes standing wave, be convenient to contrast study, overcome existing standing wave demonstrating instrument and needed manual adjustment, teacher cannot liberate the deficiency that both hands carry out content explanation when demonstration, have function many, volume is little, cost is low, the advantage of convenient demonstration.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing that need in embodiment or description of the Prior Art to use be done to simple introduction below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the schematic diagram that the utility model carries out transverse stationary wave demonstration;
Fig. 4 is the schematic diagram that the utility model carries out another kind of transverse stationary wave demonstration.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail; when the utility model embodiment is described in detail in detail, for ease of explanation, the accompanying drawing of expression device architecture can be disobeyed general ratio and be done local amplification; and described schematic diagram is example, it should not limit the scope of the utility model protection at this.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment clearly.
As depicted in figs. 1 and 2, standing wave demonstrating instrument of the present utility model comprises base 1, erecting frame 2, buncher 3, synchrodrive part 4, crank connecting link 5, limited block 6, contiguous block 7, compressional wave vibrating mass 8-1, shear wave vibrating mass 8-2 (Fig. 3), guide rail 9, running fix folder 10 and counterweight 11.Vibrating mass of the present utility model comprises compressional wave vibrating mass 8-1 and shear wave vibrating mass 8-2.
Erecting frame 2 is fixed on base 1, is fixed with buncher 3 on erecting frame 2, and buncher 3 is connected with external power source (not shown) by power lead, to obtain electric power.The motor shaft of buncher 3 is connected with synchrodrive part 4, this synchrodrive part at least comprises a pair of transmission shaft and a pair of synchronizing wheel, the present embodiment adopts two pitch wheels as synchronizing wheel, the wheel shaft of gear is transmission shaft, active synchronization wheel is arranged on the motor shaft of buncher 3, passive and synchronous wheel by bearing is fixed on erecting frame 2, when buncher 3 work, can drive two synchronizing wheels to rotate simultaneously.The upper end of crank connecting link 5 is installed on the transmission shaft of synchrodrive part 4, be in the present embodiment, the upper end of a crank connecting link 5 is connected with the wheel shaft (motor shaft of buncher 3) of active synchronization wheel, and the upper end of another root crank connecting link 5 is connected with passive and synchronous wheel shaft of taking turns.The lower end of crank connecting link 5 is connected with contiguous block 7, and compressional wave vibrating mass 8-1 is arranged on contiguous block 7, under compressional wave vibrating mass 8-1, can hang counterweight 11.The wheel shaft of the utility model active synchronization wheel can be connected with the motor shaft of motor by shaft coupling, can be also the motor shaft of motor.
In order to guarantee that compressional wave vibrating mass 8 keeps rectilinear motion when vibrating, preferably, the present embodiment is provided with limited block 6 on erecting frame 2, limited block 6 is positioned at crank connecting link 5 belows, on limited block 6, process stopper slot 6a, contiguous block 7 is through this stopper slot 6a, and limited block 6 is for limiting contiguous block 7 and move up and down in the space of stopper slot 6a (direction shown in Fig. 1 arrow).
On erecting frame 2, be provided with the guide rail 9 of lateral arrangement, on guide rail 9, being provided with can be along the running fix folder 10 of guide rail 9 transverse shiftings.Shear wave vibrating mass 8-2 is connected with contiguous block 7, running fix folder 10 for fixing shear wave vibrating mass 8-2 away from one end of contiguous block, when running fix folder 10 is positioned on guide rail 9 diverse location, can change length or the tension force of shear wave vibrating mass 8-2, thus the transverse stationary wave phenomenon of shear wave vibrating mass under demonstration different condition.
Below in conjunction with Fig. 1 and Fig. 3, Fig. 4, experimental implementation process of the present utility model is elaborated:
With reference to Fig. 1, when demonstration longitudinal stationary wave phenomenon, by compressional wave vibrating mass 8-1, as spring, be fixed on contiguous block 7, below compressional wave vibrating mass 8-1, hang counterweight, grant certain tension force to compressional wave vibrating mass 8-1, then open buncher 3, buncher 3 drives crank connecting link 5 motions by driving member, make contiguous block 7 up-down vibration as wave source, in compressional wave vibrating mass 8-1, produce standing wave phenomena.When showing single standing wave phenomena, can only on a contiguous block 7, hang compressional wave vibrating mass; When the longitudinal stationary wave phenomenon of two vibrating masies contrasts demonstration under need to be to different physical characteristicss, as contrast the asynchronous standing wave phenomena of the suffered tension force of vibrating mass, can below two contiguous blocks 7, all hang compressional wave vibrating mass 8-1, and hang up the counterweight of different quality, buncher drives two crank rod movements by synchrodrive part simultaneously, make contiguous block synchronous vibration, drive two vibrating masies to produce longitudinal stationary wave simultaneously, can be observed two kinds of standing wave phenomenas under different condition.
With reference to Fig. 3, when demonstration transverse stationary wave, by shear wave vibrating mass 8-2, as one end of elasticity tightrope is fixed on contiguous block 7, the other end of rope is fixed on running fix folder 10, now running fix folder 10 is positioned at the outboard end of guide rail 9, after fixing, open buncher 3, buncher 3 drives crank connecting link 5 motions, and make one end of rope carry out up-down vibration, in rope, form standing wave; In the time need to observing the standing wave phenomena of rope of different length or differential tension, can be by changing the position of running fix folder 10, or the diverse locations (Fig. 4) of running fix folder 10 clamping ropes are realized.
The utility model adopts crank connecting link that the circular motion of motor is converted to simple harmonic motion, by synchrodrive part is set, make motor can drive two vibrating masies to vibrate simultaneously, standing wave phenomena under convenient contrast demonstration different condition, and adopt buncher to provide power for vibration source, can change according to demand the frequency of vibration, the utlity model has not only and can demonstrate transverse stationary wave phenomenon, also can demonstrate longitudinal stationary wave phenomenon, different elastic medium material standing wave comparison of wave shape, and the relation of circular motion and simple harmonic motion, and can be by the advantage of the various standing wave phenomenas of the visual in image demonstration of change condition.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that, still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed among claim scope of the present utility model.For example, the synchrodrive part in previous embodiment adopts pitch wheel, but also can adopt belt and belt pulley to realize synchrodrive, or friction pulley etc.; Base and erecting frame can be Split type structures, can be also integral type designs, within all should being included in the scope described in claim such as these changes and equivalent transformation.
Claims (6)
1. standing wave demonstrating instrument, comprise: base, be arranged at erecting frame on described base, be fixed on the buncher on described erecting frame, the contiguous block that vibrating mass is installed moves up and down under the drive of described buncher, thereby one end of described vibrating mass is vibrated, in vibrating mass, produce standing wave;
It is characterized in that:
On described erecting frame, be provided with the synchrodrive part being connected with the motor shaft of described buncher, described synchrodrive part comprises a pair of transmission shaft and a pair of synchronizing wheel, on the transmission shaft of described synchrodrive part, be provided with crank connecting link, the lower end of described crank connecting link is connected with contiguous block, described vibrating mass is arranged on described contiguous block, and described vibrating mass comprises shear wave vibrating mass and compressional wave vibrating mass;
On described erecting frame, be provided with the guide rail of lateral arrangement, on described guide rail, being provided with can be along the running fix folder of described guide rail transverse shifting, and the described shear wave vibrating mass of described running fix folder clamping is away from one end of contiguous block.
2. standing wave demonstrating instrument as claimed in claim 1, it is characterized in that: described synchrodrive part is a pair of pitch wheel, active synchronization wheel is arranged on the motor shaft of described buncher, passive and synchronous wheel by bearing is fixed on erecting frame, the upper end of a crank connecting link is connected with the power axle of active synchronization wheel, and the upper end of another root crank connecting link is connected with passive and synchronous power axle of taking turns.
3. standing wave demonstrating instrument as claimed in claim 1 or 2, is characterized in that: described compressional wave vibrating mass below hangs counterweight.
4. standing wave demonstrating instrument as claimed in claim 1, is characterized in that: on described erecting frame, be provided with limited block, described limited block is positioned at described crank connecting link below, is provided with the stopper slot that can pass for described contiguous block on described limited block.
5. standing wave demonstrating instrument as claimed in claim 1, is characterized in that: described compressional wave vibrating mass is spring.
6. standing wave demonstrating instrument as claimed in claim 1, is characterized in that: described shear wave vibrating mass is elasticity tightrope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436769.3U CN204010437U (en) | 2014-08-04 | 2014-08-04 | Standing wave demonstrating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436769.3U CN204010437U (en) | 2014-08-04 | 2014-08-04 | Standing wave demonstrating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204010437U true CN204010437U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420436769.3U Expired - Fee Related CN204010437U (en) | 2014-08-04 | 2014-08-04 | Standing wave demonstrating instrument |
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| Country | Link |
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| CN (1) | CN204010437U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696411A (en) * | 2020-06-29 | 2020-09-22 | 天津中德应用技术大学 | Magnetic rope standing wave demonstrator |
| CN112284665A (en) * | 2020-10-22 | 2021-01-29 | 青岛农业大学 | Be used for building steel structure model anti-seismic test detection device |
| CN114299793A (en) * | 2021-12-31 | 2022-04-08 | 陕西科技大学 | Demonstration instrument for transverse wave and standing wave in different media |
-
2014
- 2014-08-04 CN CN201420436769.3U patent/CN204010437U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696411A (en) * | 2020-06-29 | 2020-09-22 | 天津中德应用技术大学 | Magnetic rope standing wave demonstrator |
| CN112284665A (en) * | 2020-10-22 | 2021-01-29 | 青岛农业大学 | Be used for building steel structure model anti-seismic test detection device |
| CN114299793A (en) * | 2021-12-31 | 2022-04-08 | 陕西科技大学 | Demonstration instrument for transverse wave and standing wave in different media |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20190804 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |