CN104504972A - Sound transmission demonstration instrument - Google Patents
Sound transmission demonstration instrument Download PDFInfo
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- CN104504972A CN104504972A CN201410544101.5A CN201410544101A CN104504972A CN 104504972 A CN104504972 A CN 104504972A CN 201410544101 A CN201410544101 A CN 201410544101A CN 104504972 A CN104504972 A CN 104504972A
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- sound transmission
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/14—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for acoustics
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- Algebra (AREA)
- Business, Economics & Management (AREA)
- Acoustics & Sound (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Closures For Containers (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a sound transmission demonstration instrument, comprising a base, a sealed cover, a fixed base, and a suspension device. The demonstration instrument is characterized in that the base is connected with the sealed cover, the base is provided with a bleeder hole communicated with the sealed cover. The fixed base is disposed in the sealed cover. The fixed base is provided with a sounding body. The suspension device is disposed on the bottom of the base or in the sealed cover. The suspension device is matched with the fixed base. Through innovation of combining the base, the sealed cover, the fixed base, and the suspension device, and the connecting structure thereof, the sound transmission demonstration instrument which is simple in structure, high in vacuum-pumping degree, good in interference property and stable in performance is provided, and the sound transmission demonstration instrument is safe and reliable, and is accurate in demonstration of property of sound transmitting in vacuum or liquid.
Description
Technical field
The present invention relates to the technical field of teaching aid, relate to a kind of sound transmission demonstrator in particular.
Background technology
In physical teaching course, the principle of sound transmission is exactly one of them course.In order to the character that demonstrating sound is propagated in a vacuum, teacher often needs to have come by the teaching aid of sound transmission.In some teaching aids, sounding body wherein all needs stationary installation to be fixed, and makes sounding body have with other media the structure contacted, is difficult to the character that demonstrating sound is propagated in a vacuum, there is the problem that accuracy that demonstrating sound propagates in a vacuum is low.And in the teaching aid with magnetic suspension structure, because structure is unreasonable, magnetic interference is wherein relatively more serious, be also difficult to the character that demonstrating sound is propagated in a vacuum.But general teaching aid of the prior art is also difficult to the character that demonstrating sound is propagated in a vacuum.Such as Chinese patent notification number CN 101593446 A, publication date on Dec 02nd, 2009, the name of innovation and creation is called a kind of sound transmission teaching aid, this Patent Case discloses a kind of teaching aid of sound transmission, by the isostructural combined innovation of container, syringe and hummer, make student perception intuitively can demonstrate airborne sound ability, but the work that vacuumizes is carried out during the teaching aid of this Patent Case by syringe, suction is little, and can exist can not the effective problem that propagate in a vacuum of demonstrating sound.And for example such as Chinese patent Authorization Notice No. CN 202332014 U, authorized announcement date on 07 11st, 2012, the name of innovation and creation is called teaching device of sound propagation test, this Patent Case discloses a kind of teaching aid of sound transmission, pass through vial, electric bell, base plate, cover plate and the isostructural combined innovation of vacuum pump, this teaching aid achieves the object that sound can not be propagated and can propagate in atmosphere in vacuum environment, but the electric bell of this Patent Case is connected with cover plate by stationary installation, when demonstrating sound is propagated, the sound of electric bell is through stationary installation and cover plate, or can outwardly propagate, can existence can not the effective problem that propagate in a vacuum of demonstrating sound.And for example such as Chinese patent Authorization Notice No. CN 202917067 U, authorized announcement date on 05 01st, 2013, the name of innovation and creation is called sound transmission demonstrator, this Patent Case discloses the acoustic propagation demonstrator in a kind of physics teaching, pass through seal closure, electromagnetic suspension sound source, by microphone, radiotelephone transmitter and the isostructural combined innovation of wireless receiving loudspeaker, the character of sound transmission can be absolutely proved, but this Patent Case to be arranged on housing case by microphone and from magnetcisuspension buoyancy aid very close to, exist by extraneous and that magnetic interference is serious problem, sounding body and electromagnetic suspension apparatus are all arranged in seal closure, when demonstrating sound is propagated in a liquid, easy generation electric shock and other safety accidents, and there is so a kind of possibility, to be sounding body undertaken transmitting by liquid or seal closure and produce the sound sent by microphone, also there is the inaccurate problem of demonstration, no matter how vacuumize simultaneously, people's ear can hear sound in the place very near near outer cover, by microphone receiving sensitivity higher and through mistake loudspeaker amplify after sounding, and external interference, more difficult realization is completely quiet, sound is represented by loudspeaker simultaneously, more lack a kind of intuitive, there is the inaccurate problem of demonstration.The present invention passes through the combined innovation of base, seal closure, holder, sounding body and levitation device and syndeton thereof, and provide a kind of structure simple, suction is high, safe and reliable, anti-interference is good, stable performance, the accurate and visual in image sound transmission demonstrator of character that demonstrating sound is propagated.
Summary of the invention
The present invention solves general teaching aid in prior art and does not effectively solve the inaccurate technical matters of character that interference free performance is poor, security performance is low and demonstrating sound is propagated, a kind of sound transmission demonstrator is provided, by the structure innovation of base, seal closure, holder, sounding body and levitation device and syndeton thereof, realizing this demonstrator, to have structure simple, suction is high, safe and reliable, and anti-interference is good, stable performance, the accurate and visual in image feature of character that demonstrating sound is propagated.
In order to solve the technical matters of above-mentioned existence, the present invention takes following technical proposals: a kind of sound transmission demonstrator, comprise base, seal closure, holder and levitation device, it is characterized in that, described base is connected with seal closure, and base is provided with the aspirating hole be connected with seal closure, described holder is arranged in seal closure, holder is provided with sounding body, in the bottom that described levitation device is arranged on base or seal closure, levitation device and holder suitable.
When demonstrating, first sounding body work, sends the sound, and student can hear sound, illustrates what sound can be propagated in atmosphere; Then sounding body is placed on base together with holder, and the seal closure that closes, make seal closure and base seal, now student also can hear sound, illustrates that the seal closure that sound passes through to isolate and base also can be propagated; Be connected with aspirating hole by vacuum pump or other air extractors, be evacuated in seal closure, now student still can hear sound, illustrates under the condition of vacuum again, and sound also can be propagated by the seal closure of isolating and base; Then make levitation device work, holder is suspended in the top of base, and now student does not hear any sound, illustrates that sound can not be propagated in a vacuum when sounding body is not with object contact.Simultaneously, sounding body is placed on base, and after seal closure is connected with base seal, in seal closure, inject liquid by aspirating hole, the general liquid injected is tap water, then by levitation device, sounding body is floated on a liquid, student still can hear the sound that sounding body sends, illustrate that sound can be propagated in tap water, then tap water is changed into other liquid, and then illustrate that sound can be propagated in a liquid.In sum, sound transmission demonstrator of the present invention can the accurate character propagated in vacuum or liquid of demonstrating sound.
Base and seal closure, structure is simple, and the sounding body realizing this demonstrator has a stable environment; Holder, combines with levitation device, in vacuum or liquid environment, sounding body is not contacted with the external world, improves the accuracy that demonstrating sound is propagated in vacuum or liquid.
As preferably, described sound transmission demonstrator also comprises vacuum pump, described vacuum pump and aspirating hole suitable, described holder is provided with column, direct supply and switch, described sounding body is arranged on the top of column, is connected with switch, and described levitation device is arranged on the bottom of base.When demonstrating, first open switch, sounding body sends the sound, and student can hear sound, illustrates what sound can be propagated in atmosphere; Then sounding body is placed on base together with holder, and the seal closure that closes, make seal closure and base seal, now student also can hear sound, illustrates that the seal closure that sound passes through to isolate and base also can be propagated; Be evacuated in seal closure by vacuum pump, now student still can hear sound again, illustrates under the condition of vacuum, sound by isolation seal closure and base also can propagate; Then levitation device is energized, affected by magnetic fields, holder is suspended in the top of base, and now student does not hear any sound, illustrate when sounding body is not with object contact, sound can not be propagated in a vacuum, after demonstration completes, takes off vacuum pump, open seal closure, take off holder, closing switch, finally close the power supply of levitation device.Vacuum pump has the high feature of suction, ensures that base and seal closure can form the environment of vacuum fast, realizes the object of efficient demonstration; Column on holder, structure is simple, raises the distance between sounding body and levitation device, effectively reduces the interference of magnetic field to sounding body of levitation device, ensure carrying out smoothly of presentation process, improve stability during diamagnetic field jamming performance and the demonstration of this demonstrator; Switch, for manually opened and cut out direct supply, compared with teleswitch, avoids and interferes with the magnetic field of magnetic levitation system; Direct supply, compared with AC power, voltage is low, safe and reliable, little to magnetic levitation interference.
As preferably, described levitation device is made up of circuit board, at least one coil, permanent magnet, and described circuit board is arranged on the bottom of base, circuit board is provided with power lead, each described coil is connected with circuit board, coil and permanent magnet suitable, described permanent magnet is arranged on the bottom of holder.The all parts of this levitation device is drawn materials conveniently, cost is lower, can directly receive in the AC power of family expenses by power lead, wiring also facilitates, or power lead is connected direct supply, in order to improve demonstration time safe and reliable, this levitation device is magnetic suspension structure, and the properties of magnetic field force also can be described.
As preferably, described sounding body is the one in mechanical sounding body, electric bell, hummer or loudspeaker, and described direct supply is the one in dry cell, rechargeable battery or mobile battery.Electric bell, hummer and loudspeaker, be common sounding body, has the advantages that cost is low.Preferred version is sounding body is mechanical sounding body or electric bell, when demonstrating the character that electric bell is propagated in a vacuum, student can intuitively arrive the vibrations of electric bell and not hear the tinkle of bells, have more visual in image feature, and mechanical sounding body, can with mechanical clockwork spring as power source, environmental protection more, anti-interference is better; Dry cell, rechargeable battery and mobile battery, all have the feature that voltage is low and safe and reliable.Wherein dry cell has the low feature of cost; Rechargeable battery, can repeated multiple timesly charge, more environmental protection; Mobile battery, had both had the feature of rechargeable battery, can also support the use with other mobile devices
As preferably, described power lead is provided with current regulator, and the outside of described coil is provided with anti-interference layer.Manually adjust current regulator, can electric current in regulating winding, and then regulate its magnetic field intensity, holder is made to have a suitable height, reduce magnetic field to the interference of sounding body, ensure carrying out smoothly of presentation process, improve stability during demonstration; Anti-interference layer, reduces external magnetic field to the interference of magnetic levitation system, improves the stability of presentation process.
As preferably, described seal closure is provided with aerosol producer, is provided with isolating high-pressure ignitor in aerosol producer.Isolating high-pressure ignitor, can automatically or remote control open, make aerosol producer work; When the experiment that demonstrating sound is propagated in a vacuum, make to be full of smog in seal closure by aerosol producer, in pumping process, student can be allowed to know the change of the vacuum tightness known in seal closure, visual in image, and in the rarefied content that air is different, the different propagation properties of sound, this device can also demonstrate the test character that object burns in a vacuum simultaneously, because the oxygen in seal closure is completely consumed or by after being evacuated in seal closure, aerosol producer just quits work, and then object aphlogistic character is in a vacuum described.
As preferably, described sound transmission demonstrator also comprises mercury cup, and described mercury cup is provided with mercury tube, and the top of mercury cup is provided with connecting pipe, and the other end of connecting pipe is connected with seal closure.At the pump process of suction pump or the drainage procedure of unwatering pump, by the change of the mercury slug in mercury tube, the pressure change known in seal closure can be known, make this demonstrator can produce the demonstrator of principle as atmospheric pressure.
As preferably, described base is provided with the inner core storing liquid, described aspirating hole is connected with inner core, described levitation device is arranged in inner core, and levitation device is made up of air chamber, suction pump and unwatering pump, and described holder is arranged in air chamber, described suction pump is all connected with holder with unwatering pump, the liquid suction pipe of suction pump is all connected with inner core with the discharging tube of unwatering pump, and described sounding body is arranged on the outside of air chamber, is connected with holder.
First open seal closure, and remove seal closure, after sounding body work, sounding body, holder and air chamber are integrally placed in the inner core on base, close aspirating hole, in inner core, pour into liquid, then regulate the duty of suction pump or unwatering pump that sounding body is floated on a liquid, student still can hear the sound that sounding body sends, and illustrates that sound can be propagated in a liquid.When demonstrating, this levitation device, compared with magnetic levitation system, completely avoid the interference of magnetic field to presentation process, and have the advantages that demonstration accuracy is high, this demonstrator can as the demonstrator of demonstrating submarine boat principle simultaneously.
As preferably, described sound transmission demonstrator also comprises telepilot and loudspeaker, the sound receiver that described holder is provided with pilot lamp and links with sounding body, described loudspeaker and sound receiver suitable, described sounding body, suction pump and unwatering pump control by telepilot.Telepilot, facilitates the operation of presentation process; Loudspeaker, amplifies the sound of sounding body, ensures that student clearly can hear the sound that sounding body sends, and ensures that presentation process is carried out smoothly.
As preferably, described seal closure, inner core and air chamber are made by transparent material.Transparent seal closure, inner core and air chamber, be convenient to the presentation process of comprehensive this demonstrator of observation of student, convenient teaching.
Owing to taking above-mentioned technical scheme, a kind of sound transmission demonstrator provided by the invention has such beneficial effect: by the combined innovation of base, seal closure, holder and levitation device and syndeton thereof, there is provided a kind of structure simple, suction is high, visual in image, safe and reliable, anti-interference is good, stable performance, the character sound transmission demonstrator accurately that demonstrating sound is propagated in vacuum or liquid.
Accompanying drawing explanation
Accompanying drawing 1 is the first structural representation of the present invention;
Accompanying drawing 2 is that the A of accompanying drawing 1 of the present invention is to enlarged drawing;
Accompanying drawing 3 is the second structural representation of the present invention;
Accompanying drawing 4 is that the B of accompanying drawing 3 of the present invention is to enlarged drawing;
Accompanying drawing 5 is the third structural representation of the present invention;
Accompanying drawing 6 is that the C of accompanying drawing 3 of the present invention is to enlarged drawing.
In figure: base 1 seal closure 2 holder 3 aspirating hole 4 sounding body 5 vacuum pump 6 column 7 direct supply 8 switch 9 circuit board 10 coil 11 permanent magnet 12 power lead 13 current regulator 14 anti-interference layer 15 aerosol producer 16 mercury cup 17 mercury tube 18 inner core 19 air chamber 20 suction pump 21 unwatering pump 22 telepilot 23 loudspeaker 24 pilot lamp 25 sound receiver 26.
Embodiment
Accompanying drawings, is described in further detail of the present invention:
Embodiment one: by reference to the accompanying drawings 1, a kind of sound transmission demonstrator, comprise base 1, seal closure 2, holder 3 and levitation device, base 1 is connected with seal closure 2, base 1 is provided with the aspirating hole 4 be connected with seal closure 2, and holder 3 is arranged in seal closure 2, and holder 3 is provided with sounding body 5, levitation device is arranged on the bottom of base 1, levitation device and holder 3 suitable.
Embodiment two: by reference to the accompanying drawings 1 and 2, a kind of sound transmission demonstrator, comprise base 1, seal closure 2, holder 3, levitation device, vacuum pump 6 and mercury cup 17, seal closure 2 is provided with aerosol producer 16, isolating high-pressure ignitor is provided with in aerosol producer 16, base 1 is connected with seal closure 2, base 1 is provided with the aspirating hole 4 be connected with seal closure 2, vacuum pump 6 is suitable with aspirating hole 4, holder 3 is provided with column 7, direct supply 8 and switch 9, sounding body 5 is arranged on the top of column 7, be connected with switch 9, holder 3 is arranged in seal closure 2, holder 3 is provided with sounding body 5, levitation device is arranged on the bottom of base 1, levitation device is by circuit board 10, at least one coil 11, permanent magnet 12 forms, the outside of coil 11 is provided with anti-interference layer 15, circuit board 10 is arranged on the bottom of base 1, circuit board 10 is provided with power lead 13, power lead 13 is provided with current regulator 14, each coil 11 is connected with circuit board 10, coil 11 is suitable with permanent magnet 12, permanent magnet 12 is arranged on the bottom of holder 3, mercury cup 17 is provided with mercury tube 18, the top of mercury cup 17 is provided with connecting pipe, the other end of connecting pipe is connected with seal closure 2, sounding body 5 is mechanical sounding body, electric bell, one in hummer or loudspeaker, direct supply 8 is dry cell, one in rechargeable battery or mobile battery.
Embodiment three: by reference to the accompanying drawings 3 and 4, a kind of sound transmission demonstrator, comprise base 1, holder 3 and levitation device, base 1 is provided with the inner core 19 and aspirating hole 4 that store liquid, aspirating hole 4 is connected with inner core 19, holder 3 is provided with sounding body 5, levitation device is arranged in inner core 19, levitation device is by air chamber 20, suction pump 21 and unwatering pump 22 form, holder 3 is arranged in air chamber 20, suction pump 21 is all connected with holder 3 with unwatering pump 22, the liquid suction pipe of suction pump 21 is all connected with inner core 19 with the discharging tube of unwatering pump 22, sounding body 5 is arranged on the outside of air chamber 20, be connected with holder 3.
Embodiment four: by reference to the accompanying drawings 5 and 6, a kind of sound transmission demonstrator, comprise base 1, seal closure 2, holder 3, levitation device, telepilot 23 and loudspeaker 24, base 1 is connected with seal closure 2, base 1 is provided with the inner core 19 and aspirating hole 4 that store liquid, aspirating hole 4 is connected with inner core 19, holder 3 is provided with sounding body 5, levitation device is arranged in inner core 19, levitation device is by air chamber 20, suction pump 21 and unwatering pump 22 form, holder 3 is arranged in air chamber 20, suction pump 21 is all connected with holder 3 with unwatering pump 22, the liquid suction pipe of suction pump 21 is all connected with inner core 19 with the discharging tube of unwatering pump 22, sounding body 5 is arranged on the outside of air chamber 20, be connected with holder 3, the sound receiver 26 that holder 3 is provided with pilot lamp 25 and links with sounding body 5, loudspeaker 24 is suitable with sound receiver 26, sounding body 5, suction pump 21 and unwatering pump 22 control by telepilot 23, seal closure 2, inner core 19 and air chamber 20 are made by transparent material.
Above-described four specific embodiments, to invention has been detailed introduction.Apply specific embodiment herein to set forth principle of the present invention and embodiment, the explanation of embodiment just understands core concept of the present invention for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from core concept of the present invention; some modifications can also be carried out to the present invention; the sealing means of such as base and seal closure, seal closure and the size of inner core and the concrete technical parameter etc. of vacuum pump, suction pump and unwatering pump carry out the combination that some amendments or claim carry out some feasibilities, within the protection domain that should drop on the claims in the present invention.
Claims (10)
1. a sound transmission demonstrator, comprise base (1), seal closure (2), holder (3) and levitation device, it is characterized in that, described base (1) is connected with seal closure (2), base (1) is provided with the aspirating hole (4) be connected with seal closure (2), described holder (3) is arranged in seal closure (2), holder (3) is provided with sounding body (5), in the bottom that described levitation device is arranged on base (1) or seal closure (2), levitation device and holder (3) suitable.
2. a kind of sound transmission demonstrator according to claim 1, it is characterized in that, described sound transmission demonstrator also comprises vacuum pump (6), described vacuum pump (6) is suitable with aspirating hole (4), described holder (3) is provided with column (7), direct supply (8) and switch (9), described sounding body (5) is arranged on the top of column (7), and be connected with switch (9), described levitation device is arranged on the bottom of base (1).
3. a kind of sound transmission demonstrator according to claim 1 and 2, it is characterized in that, described levitation device is made up of circuit board (10), at least one coil (11), permanent magnet (12), described circuit board (10) is arranged on the bottom of base (1), circuit board (10) is provided with power lead (13), each described coil (11) is connected with circuit board (10), and coil (11) is suitable with permanent magnet (12), and described permanent magnet (12) is arranged on the bottom of holder (3).
4. a kind of sound transmission demonstrator according to claim 2, it is characterized in that, described sounding body (5) is the one in mechanical sounding body, electric bell, hummer or loudspeaker, and described direct supply (8) is dry cell, one in rechargeable battery or mobile battery.
5. a kind of sound transmission demonstrator according to claim 3, is characterized in that, described power lead (13) is provided with current regulator (14), and the outside of described coil (11) is provided with anti-interference layer (15).
6. a kind of sound transmission demonstrator according to claim 1, is characterized in that, described seal closure (2) is provided with aerosol producer (16), and aerosol producer is provided with isolating high-pressure ignitor in (16).
7. a kind of sound transmission demonstrator according to claim 1, it is characterized in that, described sound transmission demonstrator also comprises mercury cup (17), described mercury cup (17) is provided with mercury tube (18), the top of mercury cup (17) is provided with connecting pipe, and the other end of connecting pipe is connected with seal closure (2).
8. a kind of sound transmission demonstrator according to claim 1, it is characterized in that, described base (1) is provided with the inner core (19) storing liquid, described aspirating hole (4) is connected with inner core (19), described levitation device is arranged in inner core (19), levitation device is by air chamber (20), suction pump (21) and unwatering pump (22) composition, described holder (3) is arranged in air chamber (20), described suction pump (21) is all connected with holder (3) with unwatering pump (22), the liquid suction pipe of suction pump (21) is all connected with inner core (19) with the discharging tube of unwatering pump (22), described sounding body (5) is arranged on the outside of air chamber (20), be connected with holder (3).
9. a kind of sound transmission demonstrator according to claim 7, it is characterized in that, described sound transmission demonstrator also comprises telepilot (23) and loudspeaker (24), the sound receiver (26) that described holder (3) is provided with pilot lamp (25) and links with sounding body (5), described loudspeaker (24) is suitable with sound receiver (26), and described sounding body (5), suction pump (21) and unwatering pump (22) control by telepilot (23).
10. a kind of sound transmission demonstrator according to claim 7, is characterized in that, described seal closure (2), inner core (19) and air chamber (20) are made by transparent material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544101.5A CN104504972B (en) | 2014-10-15 | 2014-10-15 | Sound transmission demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544101.5A CN104504972B (en) | 2014-10-15 | 2014-10-15 | Sound transmission demonstration instrument |
Publications (2)
| Publication Number | Publication Date |
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| CN104504972A true CN104504972A (en) | 2015-04-08 |
| CN104504972B CN104504972B (en) | 2017-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410544101.5A Expired - Fee Related CN104504972B (en) | 2014-10-15 | 2014-10-15 | Sound transmission demonstration instrument |
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| CN (1) | CN104504972B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461356A (en) * | 2018-12-18 | 2019-03-12 | 温州市龙湾区教师发展中心 | Dust explosion apparatus for demonstrating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111145620A (en) * | 2020-01-20 | 2020-05-12 | 艾迪技术创新私人有限公司 | Teaching apparatus for demonstrating sound transmission through air |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156553Y (en) * | 1992-11-05 | 1994-02-16 | 袁学成 | Torricelli experiment device |
| CN2624313Y (en) * | 2003-04-28 | 2004-07-07 | 贺发亮 | A novel Torricelli experiment instrument |
| CN201210361Y (en) * | 2008-06-07 | 2009-03-18 | 陆培春 | Torricelli's experimental demonstrator convenient for storage |
| CN202332014U (en) * | 2011-10-11 | 2012-07-11 | 宁波市三江中学 | Teaching device of sound propagation test |
| CN102708730A (en) * | 2012-04-26 | 2012-10-03 | 中南大学 | Smoke adsorption capability demonstrating device |
| CN202795843U (en) * | 2012-08-02 | 2013-03-13 | 朱长明 | Experimental demonstration device for sound transmission incapability in vacuum |
| CN202917067U (en) * | 2012-06-09 | 2013-05-01 | 黄声会 | Sound propagation demonstration instrument |
-
2014
- 2014-10-15 CN CN201410544101.5A patent/CN104504972B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2156553Y (en) * | 1992-11-05 | 1994-02-16 | 袁学成 | Torricelli experiment device |
| CN2624313Y (en) * | 2003-04-28 | 2004-07-07 | 贺发亮 | A novel Torricelli experiment instrument |
| CN201210361Y (en) * | 2008-06-07 | 2009-03-18 | 陆培春 | Torricelli's experimental demonstrator convenient for storage |
| CN202332014U (en) * | 2011-10-11 | 2012-07-11 | 宁波市三江中学 | Teaching device of sound propagation test |
| CN102708730A (en) * | 2012-04-26 | 2012-10-03 | 中南大学 | Smoke adsorption capability demonstrating device |
| CN202917067U (en) * | 2012-06-09 | 2013-05-01 | 黄声会 | Sound propagation demonstration instrument |
| CN202795843U (en) * | 2012-08-02 | 2013-03-13 | 朱长明 | Experimental demonstration device for sound transmission incapability in vacuum |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109461356A (en) * | 2018-12-18 | 2019-03-12 | 温州市龙湾区教师发展中心 | Dust explosion apparatus for demonstrating |
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