CN210780691U - Infrared audio receiving network switching port transmission system - Google Patents
Infrared audio receiving network switching port transmission system Download PDFInfo
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- CN210780691U CN210780691U CN201922354281.1U CN201922354281U CN210780691U CN 210780691 U CN210780691 U CN 210780691U CN 201922354281 U CN201922354281 U CN 201922354281U CN 210780691 U CN210780691 U CN 210780691U
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Abstract
The utility model provides an infrared ray audio frequency is received and is changeed net gape transmission system, including infrared audio receiver, infrared audio receiver's output links to each other with the frequency-selective circuit, and the output of frequency-selective circuit links to each other with signal amplification circuit, and signal amplification circuit's output links to each other with differential signal processing circuit, and differential signal processing circuit's output is connected to the net gape, and the net gape passes through the audio signal processing system of paired line with differential signal transmission to distal end. The net gape transmission that adopts the paired line generally uses at network transmission, the utility model discloses creatively uses this technique to audio transmission technique, amplify and convert the audio frequency carrier signal that infrared wireless sent through this system, in order to obtain the difference signal that is used for the paired line transmission, and send to the paired line through the net gape and realize long distance's transmission, its transmission distance than the promotion that can be great in current coaxial cable, reach the transmission distance to tens of meters to hundreds of meters, can also effectually realize the audio transmission of high tone quality simultaneously.
Description
Technical Field
The utility model relates to an use infrared ray transmission audio signal's equipment, especially an infrared ray audio frequency is received and is changeed net gape transmission system.
Background
In the past, wireless microphones and the like adopt radio for wireless transmission, but are easily interfered by external signals to influence transmission quality. Therefore, a technology of wireless audio transmission by adopting infrared rays appears, and the technology is widely applied to occasions with high requirements on transmission tone quality. The infrared audio transmission technology is that audio signals are loaded into carrier waves and are wirelessly transmitted through an infrared transmitting device, and after receiving the infrared signals, an infrared receiving device needs to decode and extract corresponding audio signals to complete transmission. In practical application scenes, because the emission of infrared rays has directivity, in order to prevent the cutoff caused by shielding, the infrared emission device generally adopts infrared emission tubes which are arranged in multiple directions, and meanwhile, a plurality of infrared receiving devices are respectively arranged at multiple positions in the scenes, so that the cutoff condition caused by shielding is avoided by ensuring the receiving effect. The infrared receiving devices at different positions are connected to a group of audio decoding devices through lines to decode and obtain audio signals, the connecting line which is commonly used at present is a coaxial cable, although the coaxial cable has good anti-interference performance, for long-distance transmission, signals can still be attenuated, so that adverse effects are generated on the signals, and the transmission distance of the coaxial cable is generally only suitable for signal transmission within 20 meters.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned prior art, the utility model provides an infrared ray audio frequency is received and is changeed net gape transmission system to realize long distance audio signal transmission.
The utility model discloses a realize through following technical scheme:
the infrared audio receiving network port transmission system comprises an infrared audio receiver, wherein the output end of the infrared audio receiver is connected with a frequency selection circuit, the output end of the frequency selection circuit is connected with a signal amplification circuit, the output end of the signal amplification circuit is connected with a differential signal processing circuit, the output end of the differential signal processing circuit is connected to a network port, and the network port transmits differential signals to a far-end audio signal processing system through a twisted pair.
The infrared audio receiver is an infrared receiving tube array connected in parallel.
The infrared receiving tube arrays are in multiple groups, and the infrared receiving tube arrays of each group are respectively provided with a frequency selection circuit with corresponding frequency.
The frequency selection circuit is an inductor, the infrared audio receiver is connected with the inductor in series, and the connecting end of the series connection is connected with the input end of the signal amplification circuit.
The signal amplification circuit comprises a pre-amplification circuit and a post-amplification circuit.
The post-stage amplifying circuit is a push-pull amplifier.
The differential signal processing circuit is a mutual inductor which is connected in series between the output end of the signal amplifying circuit and the network port.
Wherein, the net mouth is RJ45 net mouth.
The utility model has the advantages that: the net gape transmission that adopts the paired line generally uses at network transmission, the utility model discloses creatively uses this technique to audio transmission technique, amplify and convert the audio frequency carrier signal that infrared wireless sent through this system, in order to obtain the difference signal that is used for the paired line transmission, and send to the paired line through the net gape and realize long distance's transmission, its transmission distance than the promotion that can be great in current coaxial cable, reach the transmission distance to tens of meters to hundreds of meters, can also effectually realize the audio transmission of high tone quality simultaneously.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
As shown in fig. 1 to fig. 2, the infrared audio receiving network port transmission system includes an infrared audio receiver U1, an output terminal of the infrared audio receiver U1 is connected to a frequency selection circuit U2, an output terminal of the frequency selection circuit U2 is connected to a signal amplification circuit U3, an output terminal of the signal amplification circuit U3 is connected to a differential signal processing circuit U4, an output terminal of the differential signal processing circuit U4 is connected to a network port, and the network port transmits a differential signal to a remote audio signal processing system through a twisted pair. The net gape transmission that adopts the paired line generally uses at network transmission, the utility model discloses creatively uses this technique to audio transmission technique, amplify and convert the audio frequency carrier signal that infrared wireless sent through this system, in order to obtain the difference signal that is used for the paired line transmission, and send to the paired line through the net gape and realize long distance's transmission, its transmission distance than the promotion that can be great in current coaxial cable, reach the transmission distance to tens of meters to hundreds of meters, can also effectually realize the audio transmission of high tone quality simultaneously.
In order to receive infrared signals carrying audio transmitted from various directions well, the infrared audio receiver U1 is an array formed by a plurality of infrared receiving tubes connected in parallel. In practical application, there may be a plurality of audio signal sources, for example, a plurality of microphones using infrared transmission technology, in order to prevent mutual interference, each microphone may select different carrier signals to perform carrier transmission on the audio signals, so that a plurality of infrared receiving tube arrays are correspondingly required to be arranged, and each infrared receiving tube array is respectively adapted to different frequency selecting circuits U2, so as to receive the infrared signals of different carriers. The frequency selection circuit U2 is inductors L3 and L4, the infrared audio receiver U1 is connected with the inductors L3 and L4 in series, only carrier signals with the same frequency as the inductors L3 and L4 are not filtered, and then the carrier signals are sent to the input end of the signal amplification circuit U3 for signal amplification.
In order to ensure the amplification effect of the signal, the signal amplification circuit U3 includes a pre-amplification circuit and a post-amplification circuit.
In order to convert the amplified carrier signal into a differential signal of a twisted pair, a differential signal processing circuit U4 is used, which is a mutual inductor L21 connected in series between the output end of the signal amplifying circuit U3 and the network port. The output end of the signal amplification circuit U3 is connected to one group of the mutual inductors L21, when the audio carrier signal is loaded to the group of the coils, the other group of the coils can generate induction signals through mutual inductance, the induction signals and the audio carrier signal are synchronous, have the same amplitude, but are opposite, namely differential signals are obtained, and the differential signals are transmitted to the twisted pair through the network port to be transmitted.
The network port is RJ45 network port, only need to adopt current comparatively general network interface can use, and current network twisted pair cable is four groups, can adopt a network twisted pair to realize that four groups of audio carrier are transmitted simultaneously.
Claims (8)
1. Infrared audio frequency is received and is changeed net gape transmission system, including infrared audio frequency receiver (U1), its characterized in that: the output end of the infrared audio receiver (U1) is connected with the frequency selection circuit (U2), the output end of the frequency selection circuit (U2) is connected with the signal amplification circuit (U3), the output end of the signal amplification circuit (U3) is connected with the differential signal processing circuit (U4), the output end of the differential signal processing circuit (U4) is connected to the network port, and the network port transmits the differential signal to the remote audio signal processing system through a twisted pair.
2. The infrared audio receiving network port transmission system according to claim 1, wherein: the infrared audio receiver (U1) is an array formed by a plurality of infrared receiving tubes connected in parallel.
3. The infrared audio receiving network port transmission system according to claim 1, wherein: the infrared receiving tube arrays are in multiple groups, and the infrared receiving tube arrays of each group are respectively provided with a frequency selection circuit (U2) with corresponding frequency.
4. The infrared audio receiving network port transmission system according to claim 1, wherein: the frequency selection circuit (U2) is inductors (L3 and L4), the infrared audio receiver (U1) is connected with the inductors (L3 and L4) in series, and the connecting end of the series connection is connected with the input end of the signal amplification circuit (U3).
5. The infrared audio receiving network port transmission system according to claim 1, wherein: the signal amplification circuit (U3) comprises a pre-amplification circuit and a post-amplification circuit.
6. The infrared audio receiving-to-network-port transmission system according to claim 5, wherein: the post-stage amplifying circuit is a push-pull amplifier.
7. The infrared audio receiving network port transmission system according to claim 1, characterized in that: the differential signal processing circuit (U4) is a mutual inductor (L21) which is connected in series between the output end of the signal amplifying circuit (U3) and the net port.
8. The infrared audio receiving network port transmission system according to claim 1, characterized in that: the net port is an RJ45 net port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354281.1U CN210780691U (en) | 2019-12-25 | 2019-12-25 | Infrared audio receiving network switching port transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354281.1U CN210780691U (en) | 2019-12-25 | 2019-12-25 | Infrared audio receiving network switching port transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210780691U true CN210780691U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922354281.1U Active CN210780691U (en) | 2019-12-25 | 2019-12-25 | Infrared audio receiving network switching port transmission system |
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| CN (1) | CN210780691U (en) |
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- 2019-12-25 CN CN201922354281.1U patent/CN210780691U/en active Active
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