阅读说明：本技术 一种交互式音叉共振装置 (Interactive tuning fork resonance device ) 是由 刘莹 杜伯源 任泳键 孙润桐 崔新宇 潘尚峰 杨建新 于 2020-06-04 设计创作，主要内容包括：一种交互式音叉共振装置,包括音叉起振装置以及同轴且均为环柱状的外圈部分、中圈平台和内圈平台,其中中圈平台能够沿中轴转动；音叉起振装置包括中央运动系统、连杆系统和音叉系统,中央运动系统设置于轴心,连杆系统包括末端带有敲击小球的若干组连杆装置,音叉系统包括固定在中圈平台上的若干频率不完全相同的中圈音叉以及与中圈音叉一一对应的球摆机构,以及固定在内圈平台上的若干内圈音叉,内圈音叉涵盖的频率与中圈音叉涵盖的频率相同,且内圈音叉的数量少于中圈音叉的数量,敲击小球与各内圈音叉一一对应,中央运动系统通过连杆系统带动各敲击小球敲击各内圈音叉。利用本发明,使用者可通过主动探索了解声波传递与共振的原理。(An interactive tuning fork resonance device comprises a tuning fork vibration starting device, an outer ring part, a middle ring platform and an inner ring platform which are coaxial and all in a ring column shape, wherein the middle ring platform can rotate along a central shaft; the tuning fork vibration starting device comprises a central motion system, a connecting rod system and tuning fork systems, the central motion system is arranged at the axis, the connecting rod system comprises a plurality of groups of connecting rod devices with knocking small balls at the tail ends, the tuning fork systems comprise a plurality of middle-ring tuning forks with incompletely identical frequencies, ball pendulum mechanisms in one-to-one correspondence with the middle-ring tuning forks and a plurality of inner-ring tuning forks fixed on inner-ring platforms, the frequencies of the tuning forks covered by the inner rings are identical to the frequencies covered by the middle-ring tuning forks, the number of the inner-ring tuning forks is less than that of the middle-ring tuning forks, the knocking small balls are in one-to-one correspondence with the inner rings of the tuning forks, and. By using the invention, a user can learn about the principles of sound wave transmission and resonance by actively exploring.)

1. An interactive tuning fork resonance device comprises a table body, a table top device and a tuning fork vibration starting device, and is characterized in that:

the table body and the table top device comprise an outer ring part (8), a middle ring platform (7) and an inner ring platform (10) which are coaxial and are all in an annular column shape, wherein the middle ring platform (7) can rotate along a central shaft;

the tuning fork vibration starting device comprises a central motion system, a connecting rod system and a tuning fork system, wherein the central motion system is arranged at the axle center of the table body and the desktop device, the connecting rod system comprises a plurality of groups of connecting rod devices with small knocking balls (21) at the tail ends, the tuning fork system comprises a plurality of middle ring tuning forks with incompletely identical frequencies fixed on a middle ring platform (7) and ball pendulum mechanisms in one-to-one correspondence with the middle ring tuning forks, and a plurality of inner ring tuning forks fixed on an inner ring platform (10), the frequencies covered by the inner ring tuning forks are identical to the frequencies covered by the middle ring tuning forks, the number of the inner ring tuning forks is less than that of the middle ring tuning forks, the small knocking balls (21) are in one-to-one correspondence with the inner ring tuning forks, and the central motion system drives the small.

2. The interactive tuning fork resonating device of claim 1, further comprising a platform support structure, the platform support structure comprising:

an inner shaft (34) for fixing and supporting the inner ring platform (10);

an upper bracket (24), a flange structure (25) and an outer shaft (30) which are connected with and support the middle ring platform (7), wherein a large synchronous belt wheel (29) is arranged on the outer shaft (30);

and a lower bracket (33) below the inner shaft (34);

wherein, a hand wheel (39) is arranged on the outer ring part (8), the hand wheel (39) is connected with a rotating shaft (37), a synchronous belt wheel (36) is arranged on the rotating shaft (37), and the synchronous belt wheel (36) transmits power to the large synchronous belt wheel (29).

3. The interactive tuning fork resonator device of claim 2, further comprising a limiting mechanism, wherein the limiting mechanism comprises a ball-hitting mechanism support (28) disposed on the lower support (33), a ball-hitting mechanism (27) is disposed at a top end of the ball-hitting mechanism support (28), and a top portion of the ball-hitting mechanism (27) is spherical and is matched with the ball-hitting groove (26) on the lower surface of the flange structure (25).

4. The interactive tuning fork resonance device according to claim 1, wherein the central motion system comprises a mechanical energy input device (17), a sleeve (16) and a central platform (15), the central platform (15) is located at the center of the table body and the table top device, the mechanical energy input device (17) is a linear motor, a push rod of the linear motor is in interference connection with the sleeve (16) through a pin shaft to completely limit the relative motion between the sleeve and the sleeve, the sleeve (16) is fixed at the lower end of the central platform (15) through welding, and the push rod of the linear motor, the sleeve (16) and the central platform (15) form a rigid body and jointly perform vertical translation.

5. The interactive tuning fork resonator device according to claim 1, wherein the linkage devices are connected to the central motion system through a horizontal revolute pair, several groups of linkage devices are uniformly distributed in the circumferential direction, and the knocking balls (21) are fixed to the ends of the outermost links (20).

6. The interactive tuning fork resonator device according to claim 1, wherein the hinged ends are uniformly distributed on the outer side of the central platform (15) along the circumferential direction for being connected with the innermost connecting rod (23) through pin shaft clearance, so as to realize the up-and-down rotation of the innermost connecting rod (23) relative to the central platform (15), the innermost connecting rod (23) is connected with the outermost connecting rod (20), and the outermost connecting rod (20) is connected with the connecting rod supporting column (19) through pin shaft clearance.

7. The interactive tuning fork resonance device according to claim 1, wherein the middle tuning fork comprises two low frequency tuning forks I (1) separated by 180 degrees, two intermediate frequency tuning forks I (6) separated by 180 degrees and two high frequency tuning forks I (9) separated by 180 degrees, the ball pendulum mechanism comprises six small ball supports (3), the small ball supports (3) are in an inverted L shape, the bottom ends of the vertical rods are fixed on the middle ring platform (7), the tail ends of the cross rods are connected with the top ends of the small ball swing rods (4) through the horizontal rotating shaft 2, the bottom ends of the small ball swing rods (4) are fixed with small balls (5), and each small ball (5) corresponds to and contacts with each middle tuning fork one to one.

8. The interactive tuning fork resonance device of claim 7, wherein the inner tuning fork comprises a second low frequency tuning fork (22), a second intermediate frequency tuning fork (18) and a second high frequency tuning fork (14).

9. The interactive tuning fork resonator device of claim 8, wherein six of the middle tuning forks are circumferentially distributed at 60 ° intervals, three of the inner tuning forks are circumferentially distributed at 120 ° intervals, and three sets of the linkage devices are circumferentially distributed at 120 ° intervals.

10. The interactive tuning fork resonance device of claim 8, wherein the frequencies of the low frequency tuning fork one (1) and the low frequency tuning fork two (22) are 256Hz, the frequencies of the intermediate frequency tuning fork one (6) and the intermediate frequency tuning fork two (18) are 512H, and the frequencies of the high frequency tuning fork one (9) and the high frequency tuning fork two (14) are 1024 Hz.

Technical Field

The invention belongs to the technical field of advanced manufacturing, and particularly relates to an interactive tuning fork resonance device.

Background

The resonance phenomenon is a very common physical phenomenon in life. Patents on presentation devices of resonance phenomenon mainly include presentation devices as exhibits, such as: a resonance demonstration instrument (patent No. ZL201721873392.8, publication No. CN 208298431U); and demonstration devices as teaching aids, such as: a resonance demonstration instrument and a demonstration method thereof (patent No. ZL201610913200.5, publication No. CN 106340230B). These resonance phenomenon demonstration devices only have a set of resonance media with the same natural frequency, and the oscillation is usually initiated by manually knocking a tuning fork, or directly initiated by an instrument, that is, directly generating a set of waves (acoustic waves, mechanical waves, electromagnetic waves, etc.) with fixed frequency by the instrument. This makes these devices less interactive and can only exhibit one resonance state, no contrast of resonance to non-resonance states, and no frequency condition required to highlight resonance.

Disclosure of Invention

In order to overcome the defects of the existing tuning fork resonance demonstration device and demonstrate the transmission of sound waves and the resonance phenomenon of the sound waves, the invention aims to provide the interactive tuning fork resonance device. Meanwhile, the user can observe the small ball close to the surface of the middle tuning fork, and the small ball is bounced by the movement of the tuning fork when the middle tuning fork generates resonance, so that the visual and auditory effects of the resonance are amplified. When the user is controlling the middle ring to rotate, whether the small ball bounces when tuning forks with different frequencies approach is observed in a contrast mode, and the principle of sound wave transmission and resonance is known through active exploration.

In order to achieve the purpose, the invention adopts the technical scheme that:

an interactive tuning fork resonance device comprises a table body, a table top device and a tuning fork vibration starting device, and is characterized in that:

the table body and the table top device comprise an outer ring part 8, a middle ring platform 7 and an inner ring platform 10 which are coaxial and are all in an annular column shape, wherein the middle ring platform 7 can rotate along a central shaft;

the tuning fork vibration starting device comprises a central motion system, a connecting rod system and a tuning fork system, wherein the central motion system is arranged at the axle center of the table body and the desktop device, the connecting rod system comprises a plurality of groups of connecting rod devices with knocking small balls 21 at the tail ends, the tuning fork system comprises a plurality of middle tuning forks with incompletely identical frequencies fixed on the middle ring platform 7 and ball pendulum mechanisms in one-to-one correspondence with the middle tuning forks, and a plurality of inner ring tuning forks fixed on the inner ring platform 10, the frequencies covered by the inner ring tuning forks are identical to the frequencies covered by the middle ring tuning forks, the number of the inner ring tuning forks is less than that of the middle ring tuning forks, the knocking small balls 21 are in one-to-one correspondence with the inner ring tuning forks, and the central motion system.

Preferably, the present invention further comprises a platform support structure comprising:

an inboard shaft 34 that fixes and supports the inner ring platform 10;

an upper bracket 24, a flange structure 25 and an outer shaft 30 which are connected with and support the middle ring platform 7, wherein the outer shaft 30 is provided with a large synchronous belt pulley 29;

and a lower bracket 33 below the inner shaft 34;

wherein, the outer ring part 8 is provided with a hand wheel 39, the hand wheel 39 is connected with a rotating shaft 37, the rotating shaft 37 is provided with a synchronous belt wheel 36, and the synchronous belt wheel 36 transmits power to the large synchronous belt wheel 29.

Preferably, the invention further comprises a limiting mechanism, the limiting mechanism comprises a ball-contacting mechanism support 28 arranged on the lower support 33, the top end of the ball-contacting mechanism support 28 is provided with a ball-contacting mechanism 27, and the top of the ball-contacting mechanism 27 is spherical and matched with the ball-contacting groove 26 on the lower surface of the flange structure 25.

Preferably, the central motion system comprises a mechanical energy input device 17, a sleeve 16 and a central platform 15, the central platform 15 is located at the center of the table body and the table top device, the mechanical energy input device 17 is a linear motor, a push rod of the linear motor is in interference connection with the sleeve 16 through a pin shaft, relative motion between the push rod and the sleeve is completely limited, the sleeve 16 is fixed at the lower end of the central platform 15 through welding, and the push rod of the linear motor, the sleeve 16 and the central platform 15 form a rigid body and jointly perform vertical translation.

Preferably, the connecting rod devices are connected with the central motion system through horizontal rotating pairs, a plurality of groups of connecting rod devices are uniformly distributed in the circumferential direction, and the knocking small balls 21 are fixed at the tail ends of the outermost connecting rods 20.

Preferably, hinged ends are uniformly distributed on the outer side of the central platform 15 along the circumferential direction and are used for being in clearance connection with the innermost connecting rod 23 through a pin shaft, so that the innermost connecting rod 23 rotates up and down relative to the central platform 15, the innermost connecting rod 23 and the outermost connecting rod 20 are connected, and the outermost connecting rod 20 and the connecting rod supporting column 19 are also in clearance connection through a pin shaft to achieve connection.

Preferably, the middle ring tuning fork includes two low frequency tuning forks 1, two intermediate frequency tuning forks 6 and two high frequency tuning forks 9 of 180 of being separated by 180, the pendulum mechanism includes six bobble supports 3, bobble support 3 is the shape of falling L, and the montant bottom mounting is on middle ring platform 7, and the horizontal pole end is connected the top of bobble pendulum rod 4 through horizontally pivot 2, and the bottom mounting of bobble pendulum rod 4 has bobble 5, and each bobble 5 and each middle ring tuning fork one-to-one and contact.

Preferably, the inner ring tuning forks comprise a second low frequency tuning fork 22, a second intermediate frequency tuning fork 18 and a second high frequency tuning fork 14.

Preferably, six the center circle tuning forks are in 60 degree equidistant distribution on the circumference, three the inner circle tuning forks are in 120 degree equidistant distribution on the circumference, and three sets of the link devices are in 120 degree equidistant distribution on the circumference.

Preferably, the frequencies of the low-frequency tuning forks I1 and the low-frequency tuning forks II 22 are 256Hz, the frequencies of the medium-frequency tuning forks I6 and the medium-frequency tuning forks II 18 are 512H, and the frequencies of the high-frequency tuning forks I9 and the high-frequency tuning forks II 14 are 1024 Hz.

Compared with the prior art, the invention has the beneficial effects that:

through the reasonable design of the connecting rod mechanism, in the single-pass movement process of the central push rod, the connecting rod connected with the knocking small ball can realize three steps of falling, hitting and leaving the tuning fork. Compared with the scheme that the traditional central push rod moves to the stroke to realize the falling and knocking of the connecting rod and moves to the return stroke to realize the lifting of the connecting rod, the invention can improve the knocking frequency and avoid the sudden stop returning action, thereby reducing the requirement on the working capacity of an input source.

The invention utilizes the mode of uniformly arranging the connecting rods and the tuning forks in the circumferential direction, and uses the central motion system as the only input, thereby ensuring that the force, the time and the positions of knocking the small balls are the same. The mode of symmetrically arranging the connecting rods and the tuning forks not only can realize the effect of generating multiple outputs by single input, but also plays a role in controlling variables.

The invention uses the motor as a power source, can accurately control the frequency and the speed of movement, and can realize the function of continuously knocking the tuning fork so as to facilitate audiences to observe the resonance phenomenon.

According to the invention, through arranging the rotatable middle ring platform and the limiting device, audiences can rotate the hand wheel to operate the middle ring to rotate, and tuning forks with different frequencies are close to each other, so that the invention has strong interactivity; after the tuning forks at the same frequency are close to each other after the inner ring is excited, the tuning forks at the middle ring generate stronger resonance corresponding to the tuning forks, and further bounce the small balls leaning against the surfaces of the tuning forks, so that an equivalent method and an amplification method in scientific research are adopted, and the sound wave transmission which is not obvious in tuning fork vibration and difficult to understand is converted into macroscopic small ball motion and visualization is realized; the movement states of the small balls are different when the different tuning forks are aligned, so that curiosity of audiences can be excited, the phenomena of independent thinking and contrast of the audiences are promoted, and the principles of sound wave propagation and resonance are understood.

Drawings

Fig. 1 is a schematic diagram of the overall effect of the present invention.

FIG. 2 is a schematic view of the striking mechanism of the present invention.

Fig. 3 is a schematic view of the support and transmission mechanism of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings and examples.

The invention discloses an interactive tuning fork resonance device, which is based on an amplification method and an electric control knocking sound production, and the general idea comprises the following steps:

first, to show the relationship between resonance and frequency more clearly, three sets of tuning forks with different frequencies are used for comparative demonstration, and the audience can change the pitch of the tuning forks with different frequencies to actively participate in the link generating resonance. With such a more interactive device, the viewer can more actively explore, think about, recognizing that resonance occurs only between objects having the same natural frequency. Meanwhile, according to the forced damping vibration equation, when the difference between the input angular frequency and the natural angular frequency of the forced vibration tuning fork exceeds 20Hz, the energy absorbed by the forced vibration tuning fork is almost 0. Therefore, as long as the natural frequencies of the tuning forks with different frequencies differ by more than 20Hz, they do not affect each other. Secondly, the module of shaking of this device does: the specially designed connecting rod structure drives the small hammer to knock the tuning fork at the middle ring part, so that the vibration starting effect is achieved. Compared with manual tapping of audiences, the device simplifies the operation of the audiences, improves the tapping consistency, controls the variable and also enables the audiences to visually observe that two tuning forks with the same natural frequency resonate.

The specific structure of the invention can refer to fig. 1, and mainly comprises a set of table body and table top device and a tuning fork vibration starting device, wherein:

the table body and the table top device comprise an outer ring part 8, a middle ring platform 7 and an inner ring platform 10 which are coaxial and are all in an annular column shape, wherein the middle ring platform 7 can rotate along a central shaft, namely the middle ring platform 7 can rotate, and the outer ring part 8 and the inner ring platform 10 can be fixed parts;

the tuning fork vibration starting device mainly comprises a central motion system, a connecting rod system and tuning fork systems, wherein the central motion system is arranged at the axle centers of the table body and the desktop device, the connecting rod system comprises a plurality of groups of connecting rod devices with knocking small balls 21 at the tail ends, the tuning fork systems comprise a plurality of middle tuning forks with different frequencies and ball pendulum mechanisms which are in one-to-one correspondence with the middle tuning forks, which are fixed on the middle ring platform 7, and a plurality of inner ring tuning forks are fixed on the inner ring platform 10, the frequencies covered by the inner ring tuning forks are the same as the frequencies covered by the middle ring tuning forks, the number of the inner ring tuning forks is less than that of the middle ring tuning forks, the knocking small balls 21 are in one-to-one correspondence with the inner ring tuning forks.

In this embodiment, the middle tuning forks include two low-frequency tuning forks one 1 spaced apart by 180 °, two medium-frequency tuning forks one 6 spaced apart by 180 °, and two high-frequency tuning forks one 9 spaced apart by 180 °, and the six middle tuning forks are equally spaced at 60 ° on the circumference. Correspondingly, the ball pendulum mechanism includes six bobble supports 3, bobble support 3 is the shape of falling L, and the montant bottom mounting is on well circle platform 7, and the bottom mounting of bobble pendulum rod 4 has bobble 5, and the horizontal pole end of bobble support 3 is through the top of horizontally pivot 2 connection bobble pendulum rod 4 to the degree of freedom of restriction bobble 5 and the motion of pendulum rod 4 prevents that acceleration from influencing bobble 5 motion when well circle platform 7 is rotatory. Each ball 5 corresponds to and contacts each middle tuning fork one by one, namely, the ball 5 leans against the surface of the tuning fork in a static state, and the ball 5 can bounce at a larger angle when the tuning forks resonate. The inner ring tuning forks comprise a low-frequency tuning fork II 22, an intermediate-frequency tuning fork II 18 and a high-frequency tuning fork II 14, and the three inner ring tuning forks are distributed at equal intervals of 120 degrees on the circumference.

Referring to fig. 2, in this embodiment, the central motion system includes a mechanical energy input device 17, a sleeve 16, and a central platform 15, the sleeve 16 providing an interface between the mechanical energy input device 17 and the central platform 15. The central platform 15 is located at the center of the table body and the table top device, the mechanical energy input device 17 is a linear motor, a push rod of the linear motor is in interference connection with a sleeve 16 through a pin shaft to completely limit the relative movement between the table body and the table top device, the sleeve 16 is fixed at the lower end of the central platform 15 through welding, the push rod of the linear motor, the sleeve 16 and the central platform 15 form a rigid body, and under the action of a linear input power source, the push rod pushes the central platform 15 through the sleeve 16 to jointly move horizontally in the vertical direction.

Correspondingly, three groups of link devices are distributed at equal intervals of 120 degrees on the circumference, in the embodiment, the link devices are connected with the central motion system through horizontal revolute pairs, and the link devices comprise the innermost link 23, the link support column 19 and the outermost link 20. Specifically, hinged ends are evenly distributed on the outer side of the central platform 15 along the circumferential direction and are used for being connected with the front end of the innermost connecting rod 23 through pin shaft gaps, so that the innermost connecting rod 23 can rotate up and down relative to the central platform 15, the tail end of the innermost connecting rod 23 and the rod body of the outermost connecting rod 20, the front end of the outermost connecting rod 20 and the top end of the connecting rod supporting column 19 are also connected through pin shaft gaps, the knocking small ball 21 is fixed at the tail end of the outermost connecting rod 20, and the knocking small ball can be fixedly connected in an adhesive mode.

The frequencies of the low-frequency tuning forks I1 and the low-frequency tuning forks II 22 are 256Hz, the frequencies of the intermediate-frequency tuning forks I6 and the intermediate-frequency tuning forks II 18 are 512H, and the frequencies of the high-frequency tuning forks I9 and the high-frequency tuning forks II 14 are 1024 Hz.

Referring to fig. 3, in order to perform the necessary basic support and to realize the rotation function of the center ring platform 7, the present invention provides a feasible platform support structure, which comprises:

an inner side shaft 34 of the inner ring platform 10 is fixed and supported, and in order to allow a push rod of the linear motor to pass through, the inner side shaft 34 adopts a large inner hole design;

the upper bracket 24, the flange structure 25 and the outer shaft 30 are connected and support the middle ring platform 7, the flange structure 25 is arranged above the outer shaft 30, the upper bracket 24 is arranged on the flange 25 structure to support the middle ring platform 7, an end cover 32 is arranged below the outer shaft 30 to seal a bearing 31, a large synchronous belt pulley 29 is arranged on the outer shaft 30, and the rotation of the middle ring platform 7 depends on the driving of the outer shaft 30;

and a lower bracket 33 below the inner shaft 34;

wherein, in order to drive the middle ring 7 to rotate, a hand wheel 39 is arranged on the outer ring part 8, the hand wheel 39 is connected with a rotating shaft 37, a synchronous belt wheel 36 is arranged on the rotating shaft 37, and the synchronous belt wheel 36 transmits power to the large synchronous belt wheel 29. The rotating shaft 37 is used for driving the synchronous belt wheel 36, the synchronous belt 35 is used for driving the large synchronous belt wheel 29 on the outer shaft to rotate, and the outer shaft 30, the flange structure 25 and the bracket 24 are used for driving the middle ring platform 7 and six middle ring tuning forks and the ball pendulum mechanism on the middle ring platform to rotate.

Meanwhile, in order to realize the intermittent motion function, the rotation of the middle ring platform 7 uses a limiting mechanism, the limiting mechanism comprises a ball-hitting mechanism support 28 arranged on the lower support 33, the top end of the ball-hitting mechanism support 28 is provided with a ball-hitting mechanism 27, the top of the ball-hitting mechanism 27 is spherical and is matched with a ball-hitting groove 26 on the lower surface of the flange structure 25, so that the ball-hitting of the ball-hitting mechanism 27 enters the ball-hitting groove 26 after the middle ring platform 7 rotates by a certain angle to generate resistance, the middle ring platform 7 is prevented from continuing to rotate, and the intermittent motion effect is achieved.

The working principle of the embodiment is as follows:

when the viewer presses the start button 11, the mechanical energy input device 17 reciprocates up and down to drive the central platform 15 to move up and down in a reciprocating manner. Through the connecting rod devices, the up-and-down reciprocating translation of the central platform 15 is converted into the fixed-shaft reciprocating rotation of the three sets of connecting rod devices, so that the knocking small balls 21 on the three sets of connecting rod devices are driven to knock the low-frequency tuning fork II 22, the medium-frequency tuning fork II 18 and the high-frequency tuning fork II 14 respectively, simultaneously and continuously, and the two tuning forks generate vibration with different frequencies respectively. Spectators rotate the hand wheel 39 to drive the middle ring platform 7 to rotate, and the limiting device can indicate spectators to enable the inner ring tuning forks and the middle ring tuning forks with various frequencies to be close to each other; if the tuning forks of the same frequency are close, the middle tuning fork generates stronger resonance, and then the ball 5 leaning against the surface of the tuning fork is bounced. The spectators comparatively observe the movement of the small ball 5 when the tuning forks with different frequencies approach, and further explore the principle of sound wave propagation and resonance.