CN205792599U - Circumscribed infrared radio sensing receives all-in-one - Google Patents
Circumscribed infrared radio sensing receives all-in-one Download PDFInfo
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- CN205792599U CN205792599U CN201620481822.0U CN201620481822U CN205792599U CN 205792599 U CN205792599 U CN 205792599U CN 201620481822 U CN201620481822 U CN 201620481822U CN 205792599 U CN205792599 U CN 205792599U
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- infrared ray
- ray sensing
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Abstract
The utility model discloses a kind of circumscribed infrared ray sensing and receive all-in-one, including infrared ray sensing receiving portion, infrared wireless microphone part, infrared ray sensing receiving portion is independent of power amplifier, it is to be wirelessly transferred with infrared ray that circumscribed infrared ray sensing receives all-in-one, use, in the range of overcoming general radio voiceband facility large-scale cluster, the problem mutually producing frequency interferences, and device Host and infrared wireless microphone need not numbering uses, thoroughly solve the situation that equipment can not be general, original power amplification sound box can also retain use, greatly reduce the cost installing transformation.
Description
Technical field
This utility model relates to a kind of audio signaling device, is specifically related to a kind of circumscribed infrared ray sensing and receives all-in-one.
Background technology
At present, what a lot of schools used is all traditional common power amplifier or active audio amplifier teaching public address equipment, the mode that amplifies of imparting knowledge to students is the most all to use cable microphone to transmit audio frequency, and range is all around dais, teaching scope can only be confined to above dais, so some school uses existing power amplification sound box external wireless receiving main frame to carry out the modification scheme with the use of wireless microphone, although so solving teaching to use limitation and motility, also reduce the cost of equipment replacement transformation simultaneously, but owing to wireless radio transmission can be limited by electromagnetic wave band frequency, and signal penetrates readily through wall, the equipment that frequency is close to separate the problem that use is otherwise easy to occur interfering, wireless microphone also to be numbered and be carried out matching and could use simultaneously.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, wireless audio frequency transmission function is carried out with infrared ray, avoid signal through walls, equipment without problems such as numberings, thus solve use in the range of school's large-scale cluster mutually produce frequency interferences and equipment can not be general etc. problem.
This utility model be the technical scheme is that a kind of circumscribed infrared radio sensing receives all-in-one, including infrared ray sensing receiving portion, infrared wireless microphone part, infrared ray sensing receiving portion includes infrared receiver photosensitive tube, frequency demodulation circuit, digital decoding circuit, audio signal separating circuit, audio control circuit, audio signal amplification output circuit is linked in sequence, infrared wireless microphone part includes mike pickup circuit, audio coding circuit, audio control circuit, frequency modulation circuit, on-screen display circuit, signal drive amplification circuit, infrared transmitter is linked in sequence, infrared ray sensing receiving portion is independent of power amplifier.
Further, infrared wireless microphone part can use as PPT pointer and laser pointer.
Further, the on-screen display circuit of infrared wireless microphone part by the size of audio signal, can launch the power of signal, and battery electric quantity is shown on screen.
The beneficial effects of the utility model are: with infrared ray to carry out wireless audio frequency transmission function, owing to infrared ray can not be through walls, so the problem that will not mutually produce frequency interferences when using in the range of school's large-scale cluster, and device Host and infrared wireless microphone need not numbering uses, thoroughly solve the situation that equipment can not be general, and original power amplification sound box can retain use, greatly reduce the cost installing transformation, microphone also can use as PPT pointer and laser pointer, facilitate the teaching on classroom, the information such as signal electricity can be shown on screen by on-screen display circuit in real time, user is facilitated to grasp equipment situation in real time.
Accompanying drawing explanation
Fig. 1 is that circumscribed infrared radio sensing receives all-in-one infrared radio sensing receiving portion fundamental diagram.
Fig. 2 is that circumscribed infrared radio sensing receives all-in-one infrared wireless microphone fundamental diagram.
Detailed description of the invention
nullAs shown in Figure 2，The wireless microphone fundamental diagram of all-in-one is received for circumscribed infrared radio sensing，Including mike pickup circuit (5)、Audio coding circuit (10)、On-screen display circuit (15)、Audio control circuit (20)、Frequency modulation circuit (25)、Signal drive amplification circuit (30)、Infrared transmitter (35)，Sound wave is converted into audio electrical signal by pick-up head by mike pickup circuit (5)，Audio frequency is adjusted to the size needed by audio coding circuit (10) by audio control circuit (20)，Frequency modulation circuit (25) by the modulates audio signals adjusted in the frequency range that infrared ray can transmit，On-screen display circuit (15) is by the size of audio signal，Launch the power of signal，Battery electric quantity is shown on screen，Finally by signal drive amplification circuit (30) by infrared frequency drive amplification，By infrared transmitter (35), fixing carrier frequency is converted into infrared ray frequency to launch，Infrared wireless microphone can also use as PPT pointer and laser pointer.
nullAs shown in Figure 1，The infrared radio sensing receiving portion fundamental diagram of all-in-one is received for circumscribed infrared radio sensing，Including infrared receiver photosensitive tube (40)、Frequency demodulation circuit (50)、Digital decoding circuit (55)、Audio signal separating circuit (60)、Audio control circuit (65)、Audio signal amplification output circuit (70)，Receive, by infrared receiver photosensitive tube (40), the Infrared signal that infrared wireless microphone launches and again its light signal is converted into the signal of telecommunication，First pass through frequency demodulation circuit (50) from the signal of telecommunication, demodulate fixing carrier frequency，Digital decoding circuit (55) is by audio signal decoding out，Useful audio signal is separated by audio signal separating circuit (60)，Control audio volume size by audio control circuit (65) regulation to export，Finally by audio signal amplification output circuit (70), audio signal is amplified output.
Compared with prior art, infrared ray is utilized to be wirelessly transferred, owing to infrared ray can not be through walls, so the problem that will not mutually produce frequency interferences when using in the range of school's large-scale cluster, and device Host and infrared wireless microphone need not numbering uses, thoroughly solve the situation that equipment can not be general, and original power amplification sound box can retain use, greatly reduce the cost installing transformation.
Claims (3)
1. a circumscribed infrared ray sensing receives all-in-one, including infrared ray sensing receiving portion, infrared wireless microphone part, infrared ray sensing receiving portion includes infrared receiver photosensitive tube, frequency demodulation circuit, digital decoding circuit, audio signal separating circuit, audio control circuit, audio signal amplification output circuit is linked in sequence, infrared wireless microphone part includes mike pickup circuit, audio coding circuit, audio control circuit, frequency modulation circuit, on-screen display circuit, signal drive amplification circuit, infrared transmitter is linked in sequence, it is characterized in that: infrared ray sensing receiving portion is independent of power amplifier.
Circumscribed infrared ray sensing the most according to claim 1 receives all-in-one, it is characterised in that: described infrared wireless microphone part can use as PPT pointer and laser pointer.
Circumscribed infrared ray sensing the most according to claim 1 receives all-in-one, it is characterised in that: the on-screen display circuit of described infrared wireless microphone part by the size of audio signal, can launch the power of signal, and battery electric quantity is shown on screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620481822.0U CN205792599U (en) | 2016-05-25 | 2016-05-25 | Circumscribed infrared radio sensing receives all-in-one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620481822.0U CN205792599U (en) | 2016-05-25 | 2016-05-25 | Circumscribed infrared radio sensing receives all-in-one |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792599U true CN205792599U (en) | 2016-12-07 |
Family
ID=58114307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620481822.0U Active CN205792599U (en) | 2016-05-25 | 2016-05-25 | Circumscribed infrared radio sensing receives all-in-one |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205792599U (en) |
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2016
- 2016-05-25 CN CN201620481822.0U patent/CN205792599U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |