CN101951537A - Magnetorheological technology-based volume adjusting method and device - Google Patents
Magnetorheological technology-based volume adjusting method and device Download PDFInfo
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- CN101951537A CN101951537A CN201010270266XA CN201010270266A CN101951537A CN 101951537 A CN101951537 A CN 101951537A CN 201010270266X A CN201010270266X A CN 201010270266XA CN 201010270266 A CN201010270266 A CN 201010270266A CN 101951537 A CN101951537 A CN 101951537A
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Abstract
The invention relates to a magnetorheological technology-based volume adjusting method. A volume adjusting device comprises a controllable magnetic field and a container consisting of two diaphragms and a flexible material, wherein magnetorheological liquid is filled in the container, and the viscosity of the magnetorheological liquid in the paramagnetic direction is changed by changing the size of the magnetic field so as to change the transmission efficiency of sound vibration energy between the two diaphragms and fulfill the aim of adjusting the volume. Compared with the conventional volume adjusting technology, the volume adjusting method is a method for directly adjusting the transmission of the sound vibration energy.
Description
Technical field
The present invention relates to sound technique, be specifically related to utilize the volume regulation technology of magnetic flow liquid as acoustic propagation medium.
Background technology
It mainly is to adopt potentiometer to change the voltage signal that enters pre-amplifier to finish that volume is adjusted in the common electronic circuit, in circuit, can adopt modes such as mechanical potentiometer or electronic potentiometer that volume is regulated, but these volume regulative modes are all finished by certain circuit; As everyone knows, sound is produced by object vibration, just can regulate if can regulate also volume to the vibration of object, the present invention utilizes the propagation medium of magnetic flow liquid as acoustical vibration, change the viscosity of magnetic flow liquid on the paramagnetic direction by electromagnetic field, the propagation efficiency of acoustical vibration energy on magnetic flow liquid paramagnetic direction changed and reach the technology that volume is regulated.
Summary of the invention
The object of the present invention is to provide a kind of brand-new volume regulation technology, utilize magnetic converting technique that volume is regulated, expanded the application of magnetorheological materials.
Technical scheme of the present invention is as follows:
A kind of volume adjusting method and device based on magnetic converting technique, described method is to adopt the propagation medium of magnetic flow liquid as sound, it is arranged on two needs carries out between the object of sound transmission, with solenoid or electromagnet it is applied magnetic field, change the viscosity of magnetic flow liquid on the paramagnetic direction by changing magnetic field intensity, thereby change the propagation efficiency of acoustical vibration energy between two articles.
The present invention further proposes a kind of volume adjustment device based on magnetic converting technique of realizing said method, it comprises the container that is made of two diaphragms and flexible material, be full of magnetic flow liquid at this internal tank, the external stability of container has solenoid or electromagnet, solenoid or electromagnet are connected with the control power supply, two objects that two diaphragms of container are used for respectively with needs carry out sound transmission contact or are fixing, and two diaphragms of this container are made of magnetic conduction elastomeric material not.
Sound is produced by object vibration, and sound mainly by gas, propagate by liquid, solid dielectric, and the propagation of sound in medium finished by vibration medium itself; Because the communication process of sound is exactly in fact the communication process of acoustical vibration energy, so we can reach the purpose that volume is regulated by the efficient that changes vibration medium propagation acoustical vibration energy; The propagation velocity of sound in different media is different, as: the propagation velocity of sound in solid is greater than the propagation velocity of sound in liquid, the propagation velocity of sound in liquid is greater than the propagation velocity of sound in gas, again because the acoustical vibration energy is directly proportional with sound propagation velocity, so, can change sound propagation velocity as long as change the form of acoustic propagation medium, make volume adjusted thereby reach the propagation efficiency that changes the acoustical vibration energy.
Magnetic flow liquid is a kind of good suspension that flows under no external magnetic field effect, externally rapid variation can take place in its physical form under the action of a magnetic field, promptly become semi-solid state from liquid condition, in case after removing magnetic field, become flowable liquid again, this variation is continuous in reversible, and its microcosmic shows as, the distribution of ferromagnetic material is mixed and disorderly in the magnetic flow liquid under zero magnetic field condition, and the magnetic flow liquid of this moment is liquid condition; Under the effect of outside magnetic field, ferromagnetic material in the magnetic flow liquid is arranged along magnetic direction chaining pencil, magnetic flow liquid just becomes semi-solid state from liquid condition, the present invention is exactly the change that utilizes form under this outside magnetic field effect of magnetic flow liquid, realize change, thereby reach the purpose that volume is regulated acoustical vibration energy transmission efficient.
Function of the present invention is achieved in that
Magnetic flow liquid is liquid condition under zero magnetic field condition, after a diaphragm based on the volume adjustment device of magnetic converting technique receives acoustical vibration, the acoustical vibration energy is such from the process that the magnetic flow liquid of this diaphragm by liquid condition propagates into another diaphragm: because the magnetic flow liquid of this moment is liquid condition, the propagation velocity of acoustical vibration when passing through liquid magnetic flow liquid is slower, therefore, the propagation efficiency of acoustical vibration energy when passing through liquid magnetic flow liquid is lower, so, the acoustical vibration energy of propagating by liquid magnetic flow liquid is the part of whole energy, in addition, because liquid magnetic flow liquid is can not be compressed, therefore, another part of acoustical vibration energy will cause the deformation of flexible material shell during magnetic flow liquid and is converted to heat energy after being absorbed and dissipates in extruding, so the efficient of acoustical vibration energy transmission is lower between two diaphragms;
Under the effect of outside magnetic field, make based on ferromagnetic material interior in the magnetic flow liquid in the volume adjustment device of magnetic converting technique and arrange along magnetic direction chaining pencil, make magnetic flow liquid become semi-solid state from liquid condition, the propagation velocity of acoustical vibration energy when passing through the magnetic flow liquid of semi-solid state is very fast, and the acoustical vibration energy causes that the deformation of flexible material shell is very little when the magnetic flow liquid of extruding semi-solid state, therefore, the major part of acoustical vibration energy will be directly delivered to another diaphragm from the magnetic flow liquid of a diaphragm by semi-solid state, make the efficient of acoustical vibration energy delivery between two diaphragms higher; Can also regulate the state of cure of magnetic flow liquid on the paramagnetic direction by the size of regulating external magnetic field, thereby change the efficient that the acoustical vibration energy is propagated on the paramagnetic direction by magnetic flow liquid, also just changed the transmission efficiency of acoustical vibration energy between two diaphragms, realized that magnetic flow liquid regulates the volume between two diaphragms.
Volume adjusting method provided by the invention is a kind of brand-new volume control mode, compare with existing volume adjusting method, volume adjusting method of the present invention and device are a kind of acoustical vibration to be carried out direct control method, this method is except can regulating wave volume, can also be than the control and the delay in sound propagation time that are easier to solve sound propagation velocity, and can in solenoid or electromagnet, feed the electric current of special waveform, the external magnetic field that makes solenoid or electromagnet produce special shape realizes some special processings to sound.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the present invention;
Fig. 2 is the top view of Fig. 1.
Fig. 3 is a kind of application principle figure of the present invention.
Embodiment
Referring to Fig. 1 and Fig. 2, upper diaphragm 1 and following diaphragm 4 are fixed on the two ends of cylindrical shape flexible material 2 and constitute cylindrical container, in container, be full of magnetic flow liquid 5, cylindrical shape solenoid or electromagnet 3 are on the excircle of container, and between cylindrical shape solenoid or electromagnet 3 and the cylindrical shape flexible material 2 gapped 6.Cylindrical shape solenoid or electromagnet 3 are connected with control power supply 8 by lead-out wire 7.Behind cylindrical shape solenoid or electromagnet 3 feeding direct currents, form electromagnetic field (dotted line among Fig. 1 is a magnetic line of force direction) at upper diaphragm 1 and 4 on following diaphragm, magnetic flow liquid 5 between upper and lower diaphragm is changed to semi-solid state from liquid under the effect of electromagnetic field, thereby the efficient of acoustical vibration energy delivery between upper and lower diaphragm is changed.
The implementation procedure of function of the present invention is described below by Fig. 3:
Referring to Fig. 3, end at the cylindrical shape flexible material 2 of " based on the volume adjustment device of magnetic converting technique " is fixed with cone frame 10, the small end of cone 11 is fixed on the upper diaphragm 1, the big end of cone 11 is fixed on the cone frame 10, the hole 13 that the drive link 12 that is made of non-magnet_conductible material passes through on the armature 14, its two ends are separately fixed at down on diaphragm 4 and the tongue 22, and tongue 22 places between pole shoe 20 and 23 by fulcrum 15, between tongue 22 and pole shoe 20 and 23 free gap 17 are arranged; Armature 14 and armature 19 are separately fixed on two magnetic pole strengths of permanent magnet 18, and pole shoe 20 and 23 is separately fixed on armature 19 and the armature 14, is wound with coil 16 between pole shoe 20 and 23, and coil 16 links to each other with audio signal source 25 by lead-out wire 24; Pole shoe 20 and 23 and armature 19 and 14 constitute by permeability magnetic material.
When audio signal source 25 is not exported, tongue 22 will remain static in the gap between pole shoe 20 and 23 17; When the audio electrical signal of audio signal source 25 output behind coil 16, the electromagnetic field and the pole shoe 20 and 23 that produce at coil 16 produce under the acting in conjunction of magnetostatic field, make tongue 22 produce vibration, the vibration of tongue 22 is with drive link 12 to produce axial vibration again, the vibration of drive link 12 makes down diaphragm 4 do axial vibration, when controlling power supply 8 not to cylindrical shape solenoid or electromagnet 3 output DCs stream, magnetic flow liquid 5 in " based on the volume adjustment device of magnetic converting technique " is liquid condition, the propagation velocity of the axial vibration of following diaphragm 4 when passing through liquid magnetic flow liquid 5 is slower, therefore, the propagation efficiency of the axial vibration energy of following diaphragm 4 when passing through liquid magnetic flow liquid 5 is lower, and making the axial vibration amplitude of upper diaphragm 1 less, the sound that upper diaphragm 1 promotion cone 11 sends is less;
When controlling power supply 8 behind cylindrical shape solenoid or electromagnet 3 output DCs stream, under the action of a magnetic field of cylindrical shape solenoid or electromagnet 3 generations, make in " based on the volume adjustment device of magnetic converting technique " magnetic flow liquid 5 in ferromagnetic material arrange along magnetic direction chaining pencil, magnetic flow liquid 5 has become semi-solid state from liquid, the propagation velocity of the axial vibration energy of following diaphragm 4 by semisolid magnetic flow liquid 5 time is very fast, make down the propagation efficiency of axial vibration energy when passing through liquid magnetic flow liquid 5 of diaphragm 4 higher, and making the axial vibration amplitude of upper diaphragm 1 bigger, the sound that upper diaphragm 1 promotion cone 11 sends is bigger;
By regulating the size of control power supply 8 to cylindrical shape solenoid or electromagnet 3 output DCs stream, just changed the size in the magnetic field of cylindrical shape solenoid or electromagnet 3 generations, thereby changed the state of cure of magnetic flow liquid 5 on the paramagnetic direction, make down the axial vibration energy of diaphragm 4 obtain changing, thereby realized the volume adjusting between 5 pairs of upper and lower two diaphragms of magnetic flow liquid by magnetic flow liquid 5 propagation efficiency on the paramagnetic direction.
Claims (2)
1. volume adjusting method based on magnetic converting technique, it is characterized in that, described method is to adopt the propagation medium of magnetic flow liquid as sound, it is arranged on two needs carries out between the object of sound transmission, with solenoid or electromagnet it is applied magnetic field, change the viscosity of magnetic flow liquid on the paramagnetic direction by changing magnetic field intensity, thereby change the efficient that the acoustical vibration energy is propagated between two articles.
2. volume adjustment device of realizing said method based on magnetic converting technique, it is characterized in that, it comprises the container that is made of two diaphragms and flexible material, be full of magnetic flow liquid at described internal tank, the external stability of container has solenoid or electromagnet, solenoid or electromagnet are connected with the control power supply, and two objects that two diaphragms of container are used for respectively with needs carry out sound transmission contact or be fixing, and two diaphragms of described container are made of magnetic conduction elastomeric material not.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010270266XA CN101951537A (en) | 2010-09-01 | 2010-09-01 | Magnetorheological technology-based volume adjusting method and device |
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| CN201010270266XA CN101951537A (en) | 2010-09-01 | 2010-09-01 | Magnetorheological technology-based volume adjusting method and device |
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| CN101951537A true CN101951537A (en) | 2011-01-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009665A (en) * | 2018-08-27 | 2018-12-18 | 樊旭 | A kind of earplug automatically adjusting sound-proofing |
| CN109077848A (en) * | 2018-08-27 | 2018-12-25 | 樊旭 | A kind of Intelligent earplug |
| CN109223306A (en) * | 2018-08-27 | 2019-01-18 | 樊旭 | A kind of adaptive earplug |
| CN110501419A (en) * | 2019-07-18 | 2019-11-26 | 江苏大学 | A kind of acoustic measurement system of the axially adjustable uniform magnetic field loading device of band |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201805541U (en) * | 2010-09-01 | 2011-04-20 | 谭和平 | Volume adjustment device based on magneto-rheological technology |
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2010
- 2010-09-01 CN CN201010270266XA patent/CN101951537A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201805541U (en) * | 2010-09-01 | 2011-04-20 | 谭和平 | Volume adjustment device based on magneto-rheological technology |
Non-Patent Citations (2)
| Title |
|---|
| C. A. ARANCIBIA-BULNES, AND J. C. RUIZ-SUÁREZ: "Sound in a Magnetorheological Slurry", 《PHYSICAL REVIEW LETTERS》, vol. 82, no. 4, 25 January 1999 (1999-01-25), pages 727 - 730 * |
| F DONADO, J L CARRILLO AND M E MENDOZA: "Sound propagation in magneto-rheological suspensions", 《JOURNAL OF PHYSICS: CONDENSED MATTER》, vol. 14, no. 9, 22 February 2002 (2002-02-22), pages 2153 - 2157 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009665A (en) * | 2018-08-27 | 2018-12-18 | 樊旭 | A kind of earplug automatically adjusting sound-proofing |
| CN109077848A (en) * | 2018-08-27 | 2018-12-25 | 樊旭 | A kind of Intelligent earplug |
| CN109223306A (en) * | 2018-08-27 | 2019-01-18 | 樊旭 | A kind of adaptive earplug |
| CN110501419A (en) * | 2019-07-18 | 2019-11-26 | 江苏大学 | A kind of acoustic measurement system of the axially adjustable uniform magnetic field loading device of band |
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Application publication date: 20110119 |