CN207443129U - A kind of novel classroom intelligence loudspeaker - Google Patents
A kind of novel classroom intelligence loudspeaker Download PDFInfo
- Publication number
- CN207443129U CN207443129U CN201721558039.0U CN201721558039U CN207443129U CN 207443129 U CN207443129 U CN 207443129U CN 201721558039 U CN201721558039 U CN 201721558039U CN 207443129 U CN207443129 U CN 207443129U
- Authority
- CN
- China
- Prior art keywords
- sound
- classroom
- microcontroller
- speaker
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of novel classroom intelligence loudspeaker, which possesses intelligence and amplify and two kinds of working methods of sleep standby.Under intelligent speakerphone mode, the voice signal that A/D conversion circuits collect sound transducer is converted into digital signal and is transported to microcontroller, audio amplifier circuit is controlled according to preset value after control system identification intensity of sound, make it that signal is made Intelligent treatment according to the different position of speaker, amplified sound is spread out of eventually by speaker, reduces influence of the teachers volume to classroom teaching effect.Under sleep standby pattern, control system automatic identification voice signal, to confirm current public address device use state, break, review one's lessons, the periods such as night are automatically into sleep state, automatically shut down amplifying circuit.The intelligence microphone circuit is simple and practical, has innovatively arrived intelligent Application on loudspeaker with reference to the actual demand of teacher, signal stabilization, ensures the teaching efficiency of teacher on classroom, and sleep pattern has achieved the purpose that low consumption is economized on electricity.
Description
Technical field
The utility model is related to public address equipment technical fields, and in particular to a kind of novel classroom intelligence loudspeaker.
Background technology
Loudspeaker makes it propagate farther equipment as the term suggests being exactly to be amplified sound.Loudspeaker technology has been at present
Through highly developed, even more it is applied to the every aspect of life, it is small to family party, department greatly to various international conferences, concert
Meeting etc..Its classification is also very extensive, can be divided into wired intercom and wireless microphone according to signal transmission form, according to
Way can be divided into classroom instruction loudspeaker and amusement loudspeaker etc..Especially inside major institution of higher learning, loudspeaker is in size
Be seen everywhere in small classroom, have mounted to a wall either some is then that teacher's back of the body piggyback or is clipped on blackboard
On waistband, these loudspeakers function simple in structure is single, has seriously affected classroom teaching effect.It is first for portable type loudspeaker
First teacher is inconvenient to carry and a class terminates to be easy to tired out, also suffers from battery capacity deficiency, joint looseness letter sometimes
Number unstable influence for waiting undesirable elements.Compared with Portable loudspeaker, embedding fixed loudspeaker on the wall is due to that cannot move
It is dynamic, the function of amplifying almost is lost when teacher walks about in teacher, is influenced by distance bigger, and is in work for a long time
State causes the severe attrition of electric energy.Therefore, for above deficiency, design a kind of novel classroom intelligence loudspeaker and integrate two
The common advantage to amplify of kind assists classroom to give lessons, and is very important.
The content of the invention
The purpose of this utility model is to provide a kind of novel classroom intelligence loudspeaker, by microcontroller each mechanism is controlled to assist
With cooperation, amplification and transmission to teacher's voice in classroom are realized.
The utility model uses following technical solution：
A kind of novel classroom intelligence loudspeaker, including microcontroller, the input interface of the microcontroller connects sound inspection respectively
Mechanism, A/D switching mechanisms and the first power supply are surveyed, the output interface connection sound enlarger and speaker of microcontroller export speaker
Second source is directly connected to, sound detecting mechanism, A/D switching mechanisms and sound enlarger pass through transformer and second source phase
Even.
Preferably, the input interface of the microcontroller is connected to crystal oscillator and reset circuit.
Preferably, the sound enlarger includes three high-performance low-noise operational amplifiers, high-performance low-noise fortune
The model NE5532 of amplifier is calculated, each operational amplifier is all connected with two speakers, and three operational amplifiers connect respectively
Six, tri- tunnels of Zhong Hou speaker before classroom.
Preferably, the model STM32F103 of the microcontroller, the sound detecting mechanism is by three road sound transducer groups
Into sound transducer output is analog signal, and using two kinds of chips of LM386 and LM393, the A/D switching mechanisms include three
A/D converter, A/D converter use the ADC8009 chips of 8, and the three road sound that three A/D converters connect classroom respectively pass
Sensor.
The utility model has an advantageous effect in that：
Under intelligent speakerphone mode, the voice signal of the various frequencies collected is transmitted to A/D and converted by sound transducer
Circuit is transported to microcontroller after being converted into digital signal, is put after control system identification intensity of sound according to preset value control audio
Big circuit makes it that signal is made Intelligent treatment according to the different position of speaker, spreads out of amplified sound eventually by speaker, subtracts
Few teachers volume is to the shadow case of classroom teaching effect.Under sleep standby pattern, control system automatic identification voice signal,
To confirm current public address device use state, break, review one's lessons, the periods such as night are automatically into sleep state, automatic to disconnect amplification
Circuit.
The intelligence microphone circuit is simple and practical, with reference to teacher actual demand innovatively by intelligent Application to amplifying
On device, signal stabilization, sound amplification is undistorted, ensure that the teaching efficiency of teacher on classroom, sleep pattern has reached low consumption section
The purpose of electricity.
Description of the drawings
Fig. 1 is the structure diagram of novel classroom intelligence loudspeaker.
Fig. 2 is the scheme of installation of novel classroom intelligence loudspeaker.
Specific embodiment
The utility model is specifically described below in conjunction with the accompanying drawings：
With reference to Fig. 1, a kind of novel classroom intelligence loudspeaker is mainly made of, the model of microcontroller microcontroller
STM32F103。
Wherein, the input interface of microcontroller connects sound detecting mechanism, A/D switching mechanisms and the first power supply, sound respectively
Testing agency can identify sound size, and the output voltage of the first power supply is 3.3V, and the input interface of microcontroller is also respectively connected with
There are crystal oscillator and reset circuit.
The output interface of microcontroller is connected to sound enlarger and output speaker, and output speaker is directly connected to second
Power supply, sound detecting mechanism, A/D switching mechanisms and sound enlarger are connected by transformer with second source.
Sound enlarger includes three high-performance low-noise operational amplifiers, the type of high-performance low-noise operational amplifier
Number for NE5532, each operational amplifier is all connected with two speakers, three operational amplifiers connect respectively before classroom in after three
Six, road speaker.
Sound detecting mechanism is made of three road sound transducers, and sound transducer is exported as analog signal, A/D switching mechanisms
Including three A/D converters, A/D converter uses the ADC8009 chips of 8, and three A/D converters connect the three of classroom respectively
Road sound transducer.
The voice signal that sound detecting mechanism collects forms digital signal through A/D switching mechanisms and is sent into microcontroller, monolithic
The numerical value of the signal received and default is compared to determine amplification factor by machine, and control signal is passed to sound amplification
Mechanism performs, and the amplified sound of teacher is spread out of eventually by speaker.
The loudspeaker possesses intelligence and amplifies and two kinds of working methods of sleep standby, and microcontroller is the control system of intelligent loudspeaker
System, plays the role of control enlarger, signal transmission.Under sleep standby pattern, microcontroller processing sound detecting mechanism passes
The signal sent when signal is less than default value, judges that current public address device is unmanned and uses, disconnect sound detecting mechanism, sound automatically
The circuit of sound enlarger and speaker, microcontroller enter standby mode, to reach the economize on electricity purpose that nobody autotomys.
The intelligence microphone circuit is simple and practical, with reference to teacher actual demand innovatively by intelligent Application to amplifying
On device, signal stabilization, sound amplification is undistorted, ensure that the teaching efficiency of teacher on classroom, sleep pattern has reached low consumption section
The purpose of electricity.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model also should
Belong to the scope of protection of the utility model.
Claims (4)
1. a kind of novel classroom intelligence loudspeaker, including microcontroller, which is characterized in that the input interface of the microcontroller connects respectively
Sound detecting mechanism, A/D switching mechanisms and the first power supply are connect, the output interface of microcontroller connects sound enlarger and speaker,
Output speaker is directly connected to second source, and sound detecting mechanism, A/D switching mechanisms and sound enlarger pass through transformer and the
Two power supplys are connected.
2. a kind of novel classroom intelligence loudspeaker according to claim 1, which is characterized in that the input of the microcontroller connects
Mouth is connected to crystal oscillator and reset circuit.
A kind of 3. novel classroom intelligence loudspeaker according to claim 1, which is characterized in that the sound enlarger bag
Include three high-performance low-noise operational amplifiers, the model NE5532 of high-performance low-noise operational amplifier, each computing
Amplifier is all connected with two speakers, and three operational amplifiers connect six, tri- tunnels of Zhong Hou speaker before classroom respectively.
A kind of 4. novel classroom intelligence loudspeaker according to claim 1, which is characterized in that the model of the microcontroller
STM32F103, the sound detecting mechanism are made of three road sound transducers, and sound transducer output is analog signal, is used
Two kinds of chips of LM386 and LM393, the A/D switching mechanisms include three A/D converters, and A/D converter is using 8
ADC8009 chips, three A/D converters connect the three road sound transducers in classroom respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558039.0U CN207443129U (en) | 2017-11-21 | 2017-11-21 | A kind of novel classroom intelligence loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558039.0U CN207443129U (en) | 2017-11-21 | 2017-11-21 | A kind of novel classroom intelligence loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207443129U true CN207443129U (en) | 2018-06-01 |
Family
ID=62286748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721558039.0U Expired - Fee Related CN207443129U (en) | 2017-11-21 | 2017-11-21 | A kind of novel classroom intelligence loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207443129U (en) |
-
2017
- 2017-11-21 CN CN201721558039.0U patent/CN207443129U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180601 Termination date: 20181121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |