CN108154872A - A kind of mining select frequency automatically loudspeaker - Google Patents
A kind of mining select frequency automatically loudspeaker Download PDFInfo
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- CN108154872A CN108154872A CN201711380127.0A CN201711380127A CN108154872A CN 108154872 A CN108154872 A CN 108154872A CN 201711380127 A CN201711380127 A CN 201711380127A CN 108154872 A CN108154872 A CN 108154872A
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- circuit
- integrated circuit
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- input terminal
- capacitance
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of mining select frequency automatically loudspeaker, and wider with frequency range using intelligent frequency selection circuit design achievements, environment self-adaption is strong.No matter how environment changes, the work sounding that loudspeaker can normally be stablized, while sound is melodious.
Description
Technical field
The present invention relates to mine anti-explosion mechanical electric apparatus field more particularly to a kind of mining non-maintaining select frequency automatically loudspeaker.
Background technology
Mining loudspeaker must have it is explosion-proof, the characteristics such as moisture-proof are divided into mine equipment loudspeaker and mining electronic loudspeaker.With it is common
Loudspeaker are different, mining loudspeaker other than vibrating diaphragm remaining include circuit part epoxy encapsulation, wanted with meeting downhole anti-explosion
It asks.
Although present mining frequency stabilization electronic horn has some superiority on mechanical horn is replaced, there are still centainly ask
Topic.Mechanical horn advantage is that have adaptive characteristic to environment, can guarantee mechanical horn always sounding under resonance condition.But
Shortcoming is that have mechanical contact, under long-term high-frequency rush of current, the short life of loudspeaker.
Frequency stabilization electronic horn eliminates mechanical contact, extends the service life of loudspeaker, and sound quality is also more melodious than mechanical horn, but
During environmental change, loudspeaker always do not work under resonance condition, need constantly to adjust the natural oscillation frequency of horn frequency and diaphragm
Rate is consistent, the work that could stablize.
For mining product, downhole operations maintenance personnel needs periodically to open loudspeaker upper cover according to the variation of environment,
The frequency adjustment potentiometer of electro coupled oscillator is adjusted, is not otherwise adjusted for a period of time, electronic horn cannot work normally, to behaviour
It makes troubles as maintenance personnel.According further to the requirement of mining product, entire circuit part is to use epoxy other than vibrating diaphragm
It is sealed in housing, the potentiometer for causing adjustment electro coupled oscillator is also inconvenient, and sled is needed to fall a part of ring on potentiometer top
Oxygen can just find potentiometer and be adjusted.After the adjustment, the exposed portion of circuit board is also needed to according to the requirement of explosion proof of mining product
Point with epoxy again encapsulation, Operation and Maintenance personnel in ore deposit is given additionally to increase many work, and adjusted and again after encapsulation, easily
The explosion-proof performance of loudspeaker is destroyed, to bringing security risk in ore deposit.
Invention content
The purpose of the present invention is in order to overcome the problems referred above, proposing a kind of mining select frequency automatically loudspeaker, using circuit design, increase
Sensing element is added, and automatic frequency adjustment is realized using dedicated signal processing integrated circuit.
A kind of mining select frequency automatically loudspeaker proposed by the invention, including the housing with resonant cavity, upper cover, internal original paper
It is whole to be sealed with epoxy glue in addition to vibrating diaphragm with power supply and loud speaker, it is extremely suitable for containing explosive gas or quick-fried
It is used in place existing for fried property dust and wet environment.With common mining loudspeaker are different is that this loudspeaker further includes control
Wiring board, the sound sent out feed back to control circuit board by sensing element again, constantly adjustment wiring board output frequency and
The intrinsic frequency of vibrating diaphragm is consistent, and signal processing integrated circuit finally automatically selects the intrinsic frequency conduct of horn membrane
Signal exports, and makes the sound that loudspeaker are sent out most loud and clear.On the frequency signal to horn coil of wiring board output, alternation magnetic is generated
, vibrating diaphragm under the action of alternating magnetic field, in resonant cavity occur movement make a sound.
Its circuit specifically includes：
Power supply circuit, respectively in parallel
1. drain electrode, the source electrode of power speakers, power supply connection loud speaker and field-effect tube, form circuit；And
2. integrated circuit, power supply connects the power input and output terminal of several resistance, integrated circuit, forms circuit；
The grid of the output terminal access field-effect tube of integrated circuit；
Biasing circuit, it is in parallel with output terminal with the power input of integrated circuit including resistance and sensing elements；
Frequency selection circuit, including the first capacitance, the second capacitance, first resistor, second resistance, the circuit specifically includes
1. charging and frequency reception circuit, ic output connection first resistor, and it is defeated with the second of integrated circuit
Enter end connection；Wherein, between first capacitance one end access first resistor and the second input terminal of integrated circuit, other end connection the
Three resistance, are accessed between the resistance of biasing circuit and sensing elements；Second capacitance is accessed between the first capacitance and 3rd resistor, separately
Power supply circuit is accessed in one end；
2. discharge circuit, the diode including second resistance is connect, be directed toward with second resistance, the diode and the second electricity
Resistance is in parallel with first resistor；And
3. comparison circuit, including the 4th resistance being connect with first resistor, the third of other end connection integrated circuit is defeated
Enter end；
When the second input terminal voltage of integrated circuit is increased to third input terminal voltage, the first output terminal saltus step, output
It is 0；When the second input terminal voltage of integrated circuit is reduced to third input terminal voltage, the first capacitance, the second capacitance are to integrated
The first output terminal electric discharge of circuit, until the second input terminal voltage of integrated circuit turns over and is reduced to third input terminal voltage, at this time
First output end voltage is overturn again as supply voltage.
Further, the field-effect tube is replaced with triode.Wherein, the grid of field-effect tube corresponds to the base of triode
Pole, the collector of the corresponding triode of drain electrode of field-effect tube, the source electrode of field-effect tube correspond to the emitter of triode.
Further, the sound sensor element is sensor.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the circuit structure diagram of the present invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Diagram is closed, above-mentioned technical proposal is expanded on further.
As shown in Figure 1, this patent product is mainly made of upper cover 1, housing 2, wiring board 3, vibrating diaphragm 4.Housing is one
A resonant cavity, the frequency signal of wiring board output are output on horn coil, generate alternating magnetic field, vibrating diaphragm is in alternating magnetic field
Under the action of, it moves, and make a sound.
Fig. 2 is this patent product electrical schematic diagram, and electro coupled oscillator work makes sound horn and common mining electronic loudspeaker not
The same is that the sound that loudspeaker are sent out feeds back to control circuit board by sensing element again, can adjust the frequency of wiring board output
Rate is consistent with the intrinsic frequency of vibrating diaphragm, and the signal processing integrated circuit of loudspeaker finally automatically selects horn membrane
Intrinsic frequency is exported as signal, makes the sound that loudspeaker are sent out most loud and clear.
In the implementation of technical solution, mainly realized by control circuit board.Wiring board consists of the following parts, resistance R1
To R10, capacitance C and C2, diode D1 and D2, zener diode ZD1 insure FS1, special signal processing integrated circuit U1, field
Effect pipe Q1, microphone H1 and loudspeaker L1 etc. compositions.
The implementation of mining select frequency automatically loudspeaker technical solution is field-effect tube Q1 for IRF840, and integrated circuit U1 is
LM258。
Specific connection relation is, 1 foot of integrated circuit U1 and one end of R2, one end of R4, one end of R5, R9 one end connect
Connect, 2 feet are connect with the anode of one end of capacitance C1, the other end of R4, D1, one end of 3 feet and R5, one end of R7, R8 one end
Connection, 4 feet are connected as IC1 input powers cathode with power input Ui ends cathode, and 8 feet are connected as IC1 power inputs anode
To one end of resistance R10, one end of R3, one end of R8, ZD1 anode；The other end of R9 connects field as audio input signal
Effect pipe Q1 grid Gs, field-effect tube Q1 drain Ds connection horn coil L1 one end, power input Ui positive terminals are connected to horn wire
The other end of circle, field-effect tube Q1 source Ss are connect with power supply Ui negative inputs, high-performance sound pick-up H1 one end and resistance R3 mono-
End, the connection of R6 one end, other end connection power input Ui cathode.
The present invention increases sensing element on the basis of original mining electronic loudspeaker, and is integrated using dedicated signal processing
Circuit, the output of the intrinsic frequency of signal processing integrated circuit final choice vibrating diaphragm as voice signal, and be output to
Horn coil power device uses field-effect tube, exports so more stable, and circuit efficiency is high, and not only loudspeaker are from safeguarding, and
It is not interfered by external environment, output sound is loud and clear.Wiring board is mainly formed by with lower part, resistance R1 to R10, capacitance C1 and
C2, diode D1 and D2, zener diode ZD1 insure FS1, signal processing integrated circuit U1, field-effect tube Q1, sensing element
The compositions such as H1 and loudspeaker L1.
The connection relation of Integrated circuit portion is：
One end of 1 foot and R2, one end connection of one end of R4, one end of R5, R9, one end of 2 feet and capacitance C1, R4 it is another
One end, the anode connection of D1,3 feet and one end of R5, one end connection of one end of R7, R8,4 feet are as IC1 input power cathode
It is connected with power input Ui ends cathode, power supply passes through R1, R10 and voltage-stabiliser tube ZD1, is carried to 8 feet of signal processing integrated circuit U1
For stable operating voltage, while by R3 biasing is provided to sensing element H1.
U1 output end voltages are supply voltage, then are charged by R4 to C1 and C2, and 2 foot voltage of U1 input terminals increases at this time,
When being increased to 3 foot voltage of U1 input terminals, the life saltus step of 1 human hair combing waste of U1 output terminals, it is 0 to export, at this time C1, and C2 is by D1 and R2 to U1
1 foot of output terminal discharges so that and 2 foot of U1 input terminal voltages reduces, when being reduced to 3 foot voltage of U1 input terminals, 1 foot of U1 output terminals electricity
Pressure changes into supply voltage.Since C1 and C2 are constantly charged and discharged in positive and negative both direction, make the 1 foot output terminal of U1 in power supply
It is overturn between voltage and 0, exports some cycles and the signal of frequency.
The frequency signal of 1 foot of U1 output terminals output is input to the grid G of field-effect tube Q1 by R9, as triode,
Also there are three electrodes for field-effect tube, are grid G, source S and drain D respectively.Field-effect tube can regard a common triode as,
Grid G corresponds to base stage B, and drain D corresponds to collector C, and source S corresponds to emitter E.N-channel corresponds to NPN type triode, P-channel pair
Answer PNP type triode.Effect pipe Q1 source Ss connect power cathode, and Q1 drain Ds and the series connection of coil one end, the coil other end are connected to electricity
Source anode, when field-effect tube Q1 works, square wave frequency signal is added to by Q1 amplifications on horn coil, generates alternating magnetic field,
Vibrating diaphragm moves under the action of alternating magnetic field, and makes a sound.
H1 is a sound sensor element, and supply voltage provides mono- bias voltage of H1 by R3.H1 receives the sound of loudspeaker
Sound signal, by transform acoustical signals into voltage signal, into the voltage control signal processing circuit of special signal processing integrated circuit U1
In, for changing C1 and C2 charging and discharging states, control has adjusted the signal of the electro coupled oscillator output of signal processing integrated circuit
Frequency.It is exactly frequency that diaphragm vibration occurs that the voice signal that microphone receives is practical.When changes in environmental conditions diaphragm
Natural mode shape just changes, and the frequency of signal processing integrated circuit output at this time is also with variation, such closed loop feedback
System ensures that the sound frequency of signal processing integrated circuit selection output is forever consistent with the intrinsic frequency of loudspeaker.It ensure that
Loudspeaker always work under resonance condition, maintain maximum lasting sound pressure level.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (3)
1. a kind of mining select frequency automatically loudspeaker, including the housing with resonant cavity, upper cover, inside has power supply and loud speaker,
It being characterized in that, further includes control circuit board, circuit includes-
1) power supply circuit, respectively in parallel-
A) drain electrode, the source electrode of power speakers, power supply connection loud speaker and field-effect tube, form circuit；And
B) integrated circuit, power supply connect the power input and output terminal of several resistance, integrated circuit, form circuit；It is integrated
The grid of the output terminal access field-effect tube of circuit；
2) biasing circuit, it is in parallel with output terminal with the power input of integrated circuit including resistance and sensing elements；
3) frequency selection circuit, including the first capacitance, the second capacitance, first resistor, second resistance, the circuit specifically includes-
A) charging and frequency reception circuit, ic output connection first resistor, and with the second input terminal of integrated circuit
Connection；Wherein, between first capacitance one end access first resistor and the second input terminal of integrated circuit, other end connection third electricity
Resistance, is accessed between the resistance of biasing circuit and sensing elements；Second capacitance is accessed between the first capacitance and 3rd resistor, the other end
Access power supply circuit；
B) discharge circuit, the diode including second resistance is connect, be directed toward with second resistance, the diode and second resistance with
First resistor is in parallel；And
C) comparison circuit, including the 4th resistance being connect with first resistor, the other end connects the third input terminal of integrated circuit；
When the second input terminal voltage of integrated circuit is increased to third input terminal voltage, the first output terminal saltus step, it is 0 to export；
When the second input terminal voltage of integrated circuit is reduced to third input terminal voltage, the first capacitance, the second capacitance are to integrated circuit
The electric discharge of the first output terminal, until the second input terminal voltage of integrated circuit turns over and is reduced to third input terminal voltage, at this time first
Output end voltage is overturn again as supply voltage.
2. a kind of mining select frequency automatically loudspeaker according to claim 1, which is characterized in that the field-effect tube is with triode
Instead of, wherein, the grid of field-effect tube corresponds to the base stage of triode, the collector of the corresponding triode of drain electrode of field-effect tube, field
The source electrode of effect pipe corresponds to the emitter of triode.
3. a kind of mining select frequency automatically loudspeaker according to claim 1, which is characterized in that the sound sensor element is passes
Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380127.0A CN108154872A (en) | 2017-12-20 | 2017-12-20 | A kind of mining select frequency automatically loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711380127.0A CN108154872A (en) | 2017-12-20 | 2017-12-20 | A kind of mining select frequency automatically loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108154872A true CN108154872A (en) | 2018-06-12 |
Family
ID=62464017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711380127.0A Pending CN108154872A (en) | 2017-12-20 | 2017-12-20 | A kind of mining select frequency automatically loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108154872A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107086U (en) * | 1991-04-29 | 1992-06-10 | 陶金林 | Wireless calling system |
| CN1085019A (en) * | 1993-07-21 | 1994-04-06 | 淮南矿业学院 | The high-effect long distance power supply of colliery mine lighting and signal and short-circuit protection method |
| JP2003216183A (en) * | 2002-01-25 | 2003-07-30 | Sony Corp | Method and device for retrieving information |
| CN2685967Y (en) * | 2004-03-09 | 2005-03-16 | 程叙然 | Computer radio operating and controlling device |
| CN107347170A (en) * | 2017-07-04 | 2017-11-14 | 上海理工大学 | A kind of mining universal electronic loudspeaker device |
-
2017
- 2017-12-20 CN CN201711380127.0A patent/CN108154872A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107086U (en) * | 1991-04-29 | 1992-06-10 | 陶金林 | Wireless calling system |
| CN1085019A (en) * | 1993-07-21 | 1994-04-06 | 淮南矿业学院 | The high-effect long distance power supply of colliery mine lighting and signal and short-circuit protection method |
| JP2003216183A (en) * | 2002-01-25 | 2003-07-30 | Sony Corp | Method and device for retrieving information |
| CN2685967Y (en) * | 2004-03-09 | 2005-03-16 | 程叙然 | Computer radio operating and controlling device |
| CN107347170A (en) * | 2017-07-04 | 2017-11-14 | 上海理工大学 | A kind of mining universal electronic loudspeaker device |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180612 |