CN208046889U - Audio collection subsystem and court's trial conference system - Google Patents
Audio collection subsystem and court's trial conference system Download PDFInfo
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- CN208046889U CN208046889U CN201820316446.9U CN201820316446U CN208046889U CN 208046889 U CN208046889 U CN 208046889U CN 201820316446 U CN201820316446 U CN 201820316446U CN 208046889 U CN208046889 U CN 208046889U
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- sound
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- amplification
- audio collection
- collection subsystem
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Abstract
The utility model discloses a kind of audio collection subsystem and court's trial conference systems,It is related to meeting monitoring,The problem of sound size is not sufficiently stable when for sound collection,Provide following technical scheme,Including sound detection circuit,Amplify stage circuit,Sound amplifying circuit,Gating circuit,After sound detection signals of the sound detection circuit output corresponding to sound size,Sound detection signals are compared by amplification stage circuit with sound datum signal,Then sound detection signals are classified,Output amplification graded signal,Distinguished corresponding to different grades of sound of different sizes,Then gating circuit respectively amplifies different size of sound different multiples in response to amplification graded signal control amplifying circuit,The specially larger multiple of the smaller amplification of sound,The smaller multiple of the larger amplification of sound,To realize the output of sound size stabilization,Improve the acquisition quality of sound.
Description
Technical field
The utility model is related to meeting monitoring, more specifically, it relates to a kind of audio collecting system and court's trial meeting system
System.
Background technology
Court's trial meeting often needs to be monitored the image and audio document of meeting, but when actually recording, due to
Collected sound may due to far and near or source of sound itself, after too small sound collection the later stage can not understand and differentiate, and
If unified amplify all sound, and will appear meeting bigger after the larger amplification of sound itself, thus recording effect needs to be carried
It rises.
Utility model content
In view of the deficienciess of the prior art, the first of the utility model is designed to provide a kind of audio collection subsystem
System has the advantages that sound output size stabilization.
To achieve the above object, the utility model provides following technical solution：
A kind of audio collection subsystem, including
Sound detection circuit, the sound detection signals for exporting corresponding sound size；
Amplify stage circuit, be electrically connected with sound detection circuit, compares sound detection signals and sound datum signal
Size is to export amplification graded signal；
Sound amplifying circuit is electrically connected with sound detection circuit, for amplifying different size of sound detection signals
Different multiples exports audio signal；
Gating circuit, in response to amplification graded signal selection conducting with control sound amplifying circuit will compared with small voice amplify compared with
Big multiple.
It is put after sound detection signals of the sound detection circuit output corresponding to sound size using above-mentioned technical proposal
Sound detection signals are compared by big stage circuit with sound datum signal, are then classified to sound detection signals, defeated
Go out and amplify graded signal, i.e., is distinguished corresponding to different grades of sound of different sizes, then gating circuit is in response to putting
Big graded signal control amplifying circuit respectively amplifies different size of sound different multiples, the specially smaller amplification of sound
Larger multiple, the smaller multiple of the larger amplification of sound improve the acquisition matter of sound to realize the output of sound size stabilization
Amount.
Preferably, the amplification stage circuit includes ten for comparing sound detection signals and sound datum signal magnitude
Step voltage comparator circuit.
Using above-mentioned technical proposal, the connection of ten step voltage comparator circuits is simple, at low cost, the operation is stable, and error is small.
Preferably, the amplification stage circuit further includes the reference circuit for adjusting sound datum signal magnitude.
Using above-mentioned technical proposal, the size of sound datum signal is set by reference circuit, can be set as needed
Sound amplifies the classification point of different multiples.
Preferably, the gating circuit includes the transistor switching circuit of several parallel connections.
It is in parallel by different transistor switching circuits using above-mentioned technical proposal, and in response to amplification graded signal into
And select conducting to realize the selection and switching of different amplification.
Preferably, the sound amplifying circuit is voltage amplifier circuit.
Using above-mentioned technical proposal, voltage amplifier circuit is relatively conventional, and repair and replacement are more convenient, and the operation is stable,
It is more practical, meet need of work.
Preferably, the sound amplifying circuit is electrically connected with filter circuit.
Using above-mentioned technical proposal, filter circuit can inhibit noise jamming, keep sound output purer.
Preferably, the sound amplifying circuit is electrically connected with the power conditioning circuitry of adjustment output power.
Using above-mentioned technical proposal, although carrying out a degree of voltage amplification after sound detection, output resistance compared with
Greatly, when the resistance of late-class circuit is compared with one hour rated output deficiency, distortion is serious, therefore makes after access power adjusting circuit follow-up defeated
More support circuits are provided.
Preferably, the power conditioning circuitry is voltage follower circuit.
Using above-mentioned technical proposal, voltage follower circuit can reduce output resistance, improve the load capacity of output, drop
Distortion when low access low ohmic load.
In view of the deficienciess of the prior art, the second of the utility model is designed to provide a kind of court's trial conference system,
Has the advantages that sound collection size stabilization.
To achieve the above object, the utility model provides following technical solution：
A kind of court's trial conference system, including court's trial conference system as described above.
Using above-mentioned technical proposal, the sound size recorded by audio collecting system is more stablized.
In conclusion the utility model has the advantages that：
1. the size of detection sound to be collected, and sound size is classified, the sound of sound smaller portions is put
The sound of big larger multiple, sound major part amplifies smaller multiple, to realize that stablizing for sound recording exports；
2. reducing output resistance by voltage follower, distortion when helping to reduce access low ohmic load；
3. circuit structure is simple, component is at low cost, easy to maintain.
Description of the drawings
Fig. 1 is the functional block diagram of court's trial conference system in the utility model；
Fig. 2 is the functional block diagram of the utility model sound intermediate frequency acquisition subsystem；
Fig. 3 is the circuit diagram of sound detection circuit and amplification stage circuit in the utility model；
Fig. 4 is the circuit diagram of gating circuit and amplifying circuit in the utility model；
Fig. 5 is the circuit diagram of power conditioning circuitry in the utility model.
In figure：1, sound detection circuit；2, sound amplifying circuit；3, amplify stage circuit；31, ten step voltage comparator electricity
Road；32, reference circuit；4, gating circuit；5, power conditioning circuitry.
Specific implementation mode
With reference to the accompanying drawings and embodiments, the utility model is described in detail.
A kind of court's trial conference system, referring to Fig.1, including audio collection subsystem, video acquisition subsystem and court's trial master
The sound that machine, wherein audio collection subsystem are used to acquire court's trial scene carries out being recorded as audio data being transmitted to court's trial host,
Video acquisition subsystem is converted into video data transmission to court's trial host for that will influence data.
Court's trial conference system further includes that information publication host, display subsystem and sound equipment subsystem, information issue host
For notes, evidence in court to be shown, influence information is sent to display subsystem and is shown, and sound is believed
Breath is sent to sound equipment subsystem and plays out.In addition, court's trial conference system further includes issuing host to court's trial host and information
The power-supply controller of electric of power supply.
With reference to Fig. 2, audio collection subsystem include sound detection circuit 1, amplification stage circuit 3, sound amplifying circuit 2 with
And gating circuit 4, wherein sound detection circuit 1 are used to export the sound detection signals corresponding to sound size, amplification classification electricity
Road 3 is electrically connected with sound detection circuit 1, and the size for comparing sound detection signals and sound datum signal examines sound
It surveys signal and amplification graded signal is exported according to the classification of sound size, sound amplifying circuit 2 is for amplifying sound detection signals
Different multiple exports audio signals, gating circuit 4 control sound amplification electricity in response to amplification graded signal selection conducting
Road 2 selects different amplification factors, i.e., to small voice when beating larger multiple, loud noise amplifies smaller multiple, to realize entirety
The balance and stability of sound size exports.
With reference to Fig. 3, sound detection circuit 1 includes detection unit MIC and RC filter circuit, and detection unit is by voice signal
It is converted into voltage signal, sound detection signals are exported after RC filter circuits remove some interference signals.
It includes for comparing sound detection signals compared with ten step voltages of sound datum signal magnitude to amplify stage circuit 3
Device circuit 31 and reference circuit 32 for adjusting sound datum signal magnitude, sound datum signal correspond to sound size
Classification exports different amplification graded signals for the signal positioned at different classifications is corresponding respectively, amplifies the specific of stage circuit 3
It is connected as:
Ten step voltage comparator circuits 31 include chip IC 2, capacitance C2, and reference circuit 32 includes resistance R2 and adjustable electric
RP is hindered, wherein chip IC 2 is LM3914, and there is LM3941 1-18 to amount to 18 pins, and 5 pins of LM3941 are connected to capacitance C1
To receive sound detection signals, 2, the 4 pins ground connection of LM3941,3,9 pins of LM3941 are connected to power supply, while LM3941
3 pins are connected to the anode of electrolytic capacitor C2, and the cathode of electrolytic capacitor C2 is connected with 4 pins of LM3941,6,7 pipes of LM3941
It is grounded after foot serial adjustable resistance RP, is connected to 7 pins of LM3941 after the 8 pin series resistance R2 of LM3941, the 1 of LM3941
Pin, 18 to 10 pins are used to export ten grades of amplification graded signal, and 1,18,17,16,15 pins are taken respectively in the present embodiment
Amplification graded signal.
With reference to Fig. 4, gating circuit 4 includes the transistor switching circuit of several parallel connections, and amplifying circuit is adopted as voltage amplification
Device circuit, specific in the present embodiment are connected as：Five in parallel of transistor switching circuit, is adopted as PNP type triode, five three
The base stage of pole pipe is separately connected 1,18,17,16,15 pins with LM3941, and is put with operation in the emitter of each triode
It is all connected with different size of resistance between the reverse input end of big device, by the pre-error input circuitry for changing reverse amplification circuit
To adjust amplification factor.
With reference to Fig. 4 and Fig. 5, sound amplifying circuit 2 be electrically connected with the filter circuit that is useful for inhibiting interference signal with
And the power conditioning circuitry 5 for adjusting output power.Power conditioning circuitry 5 is voltage follower circuit, tool in the present embodiment
Body circuit is connected as：
Filter circuit includes resistance R11, diode D1, capacitance C3 and resistance R12, one end connection of wherein resistance R11
In the output end of operational amplifier IC1 to receive amplified audio signal, the other end of resistance R11 is connected to diode D1's
Anode is grounded after the cathode series capacitance C3 of diode D1, the both ends parallel resistance R12 of capacitance C3, while the moon of diode D1
Pole is connected to the input terminal of voltage follower circuit.
The operation principle and process of the present embodiment：
Sound detection circuit 1 detects the size of sound first, and output is corresponding to the sound detection signals of sound size, amplification
Stage circuit 3 compares sound detection signals and is corresponded to output amplification graded signal, amplified signal after the size of sound datum signal
In in the classification that sound detection signals are located at sound size, gating circuit 4 makes amplification in response to amplifying graded signal, selection conducting
Different size of sound is amplified different multiples by circuit, and the specially smaller sound of sound amplifies larger multiple, larger sound
Sound amplifies larger multiple, and then realizes the balance and stability of sound collection.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of audio collection subsystem, it is characterized in that：Including
Sound detection circuit (1), the sound detection signals for exporting corresponding sound size；
Amplify stage circuit (3), is electrically connected with sound detection circuit (1), compares sound detection signals and sound datum signal
Size to export amplification graded signal；
Sound amplifying circuit (2) is electrically connected with sound detection circuit (1), for putting different size of sound detection signals
Different multiple exports audio signal；
Gating circuit (4) will be amplified in response to amplification graded signal selection conducting with controlling sound amplifying circuit (2) compared with small voice
Larger multiple.
2. audio collection subsystem according to claim 1, it is characterized in that：The amplification stage circuit (3) includes being used for
Compare ten step voltage comparator circuits (31) of sound detection signals and sound datum signal magnitude.
3. audio collection subsystem according to claim 2, it is characterized in that：The amplification stage circuit (3) further includes using
In the reference circuit (32) for adjusting sound datum signal magnitude.
4. audio collection subsystem according to claim 1, it is characterized in that：The gating circuit (4) includes several parallel connections
Transistor switching circuit.
5. audio collection subsystem according to claim 1, it is characterized in that：The sound amplifying circuit (2) is put for voltage
Big device circuit.
6. audio collection subsystem according to claim 1, it is characterized in that：The sound amplifying circuit (2) is electrically connected
There is filter circuit.
7. audio collection subsystem according to claim 1, it is characterized in that：The sound amplifying circuit (2) is electrically connected
There is the power conditioning circuitry (5) of adjustment output power.
8. audio collection subsystem according to claim 7, it is characterized in that：The power conditioning circuitry (5) be voltage with
With device circuit.
9. a kind of court's trial conference system, it is characterized in that：Including audio collection subsystem as described in any of the claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820316446.9U CN208046889U (en) | 2018-03-07 | 2018-03-07 | Audio collection subsystem and court's trial conference system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820316446.9U CN208046889U (en) | 2018-03-07 | 2018-03-07 | Audio collection subsystem and court's trial conference system |
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| Publication Number | Publication Date |
|---|---|
| CN208046889U true CN208046889U (en) | 2018-11-02 |
Family
ID=63950569
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820316446.9U Active CN208046889U (en) | 2018-03-07 | 2018-03-07 | Audio collection subsystem and court's trial conference system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031083A (en) * | 2021-03-10 | 2021-06-25 | 远景能源有限公司 | Signal processing device and method for detecting metal particles in working solution |
| CN113643719A (en) * | 2021-08-26 | 2021-11-12 | Oppo广东移动通信有限公司 | Audio signal processing method and device, storage medium and terminal equipment |
-
2018
- 2018-03-07 CN CN201820316446.9U patent/CN208046889U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031083A (en) * | 2021-03-10 | 2021-06-25 | 远景能源有限公司 | Signal processing device and method for detecting metal particles in working solution |
| CN113643719A (en) * | 2021-08-26 | 2021-11-12 | Oppo广东移动通信有限公司 | Audio signal processing method and device, storage medium and terminal equipment |
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Address after: 518000 1012, maikelon building, no.6, Gaoxin South 6th Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN TIANDAO RIXIN TECHNOLOGY Co.,Ltd. Address before: 518066 south of 3rd floor, building 2, fengzeyuan storage and distribution center, Shahe West Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TIANDAO RIXIN TECHNOLOGY Co.,Ltd. |