CN204287861U - A kind of audio-frequency signal switching device - Google Patents
A kind of audio-frequency signal switching device Download PDFInfo
- Publication number
- CN204287861U CN204287861U CN201420804555.7U CN201420804555U CN204287861U CN 204287861 U CN204287861 U CN 204287861U CN 201420804555 U CN201420804555 U CN 201420804555U CN 204287861 U CN204287861 U CN 204287861U
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- audio
- mcu module
- switch chip
- switching device
- audio frequency
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Abstract
The utility model discloses a kind of audio-frequency signal switching device, comprise MCU module (1), the input interface of MCU module (1) connects computing machine (2), output interface connects audio switch chip AS1747, and the switching command that computing machine (2) sends is sent to audio switch chip AS1747 by MCU module (1); The input channel of audio switch chip AS1747 connects different audio frequency apparatuses respectively, output channel connection standard signal testing source (3); Adopt the switching command that audio switch chip AS1747 receiving computer sends, the audio frequency apparatus that need switch is switched on corresponding passage, and then makes this audio frequency apparatus set up audio frequency with standard signal test source to be connected; This switching device shifter structure is simple, can realize the switching between different audio frequency apparatus and standard measuring signal source rapidly, avoid common relay and analogue quantity switch in handoff procedure, cause the problem of sound signal distortion, ensures communication quality.
Description
Technical field
The utility model relates to the communications field, specifically a kind of audio-frequency signal switching device.
Background technology
In the field of communications, sound signal is widely used the medium for transmission, transmission quality for sound signal also becomes more and more higher, in the industry that ask for something is strict, generally all need to carry out strict testing and emulation before use is put into for audio frequency apparatus, generally all need to carry out strict testing and emulation before being put into use; Generally by these audio frequency apparatuses access standard measuring signal source, this standard measuring signal source is made to carry out emulation testing to each audio frequency apparatus respectively, and this audio frequency apparatus must be switched to standard measuring signal source when some audio frequency apparatus emulation testings, the switching mode that general employing is manual at present: first, manually by an audio frequency apparatus access standard measuring signal source, standard signal source is tested this audio frequency apparatus; Then, the audio frequency apparatus tested is unloaded, more manual by another audio frequency apparatus access standard measuring signal source, carry out the test to second audio frequency apparatus, complete the emulation to all audio frequency apparatuses and test in this manner.But above-mentioned switching mode needs staff to access each audio frequency apparatus and extract, and operating process is loaded down with trivial details, efficiency is low and greatly waste labour.Except traditional manual mode, also has a kind of switching adopting common relay or analog switch to carry out sound signal, although this mode can realize automatically switching, improve efficiency, but common relay and analog switch belong to the switch of physical equipment, because the reason of lead-in wire or contact can introduce noise, cause sound signal distortion, can not ensure the quality of signal in handoff procedure, making cannot proper communication between standard signal source and audio frequency apparatus.
Utility model content
The purpose of this utility model is to provide a kind of audio-frequency signal switching device, and this switching device shifter automatically can realize the switching between different audio frequency apparatuses and standard measuring signal source, and can ensure the quality of sound signal.
The utility model solves the technical scheme that its technical matters adopts:
A kind of audio-frequency signal switching device, comprises MCU module, and the input interface of MCU module connects computing machine, and output interface connects audio switch chip AS1747, and the switching command that computing machine sends by MCU module sends to audio switch chip AS1747; The input channel of audio switch chip AS1747 connects one group of audio frequency apparatus respectively, output channel connection standard signal testing source.
Further, described MCU module is connected with the toggle switch for arranging MCU module node address.
Further, described MCU module is connected with the LED charactron for showing MCU module node address.
Further, described audio switch chip AS1747 is connected with the status indicator lamp for display channel state.
The beneficial effects of the utility model are, adopt the switching command that audio switch chip AS1747 receiving computer sends, the audio frequency apparatus that need switch is switched on corresponding passage, and then make this audio frequency apparatus set up audio frequency with standard signal test source to be connected; This switching device shifter structure is simple, can realize the switching between different audio frequency apparatus and standard measuring signal source rapidly, avoid common relay and analogue quantity switch in handoff procedure, cause the problem of sound signal distortion, ensures communication quality.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the rear perspective view of Fig. 2.
Embodiment
As shown in Figure 1, the utility model provides a kind of audio-frequency signal switching device, comprises MCU module 1, and MCU module 1 input interface connects computing machine 2, and output interface connects audio switch chip AS1747; The input channel of audio switch chip AS1747 connects the first audio frequency apparatus 4 and the second audio frequency apparatus 5, the output channel connection standard signal testing source 3 of audio switch chip AS1747 respectively; MCU module 1 is connected with the toggle switch 6 for arranging MCU module 1 node address, and MCU module 1 is also connected with the LED charactron 7 for showing MCU module 1 node address; Described audio switch chip AS1747 is connected with the status indicator lamp 8 for display channel state.
Toggle switch 6 adopts 8421 yards to arrange the node address of MCU module 1, computing machine 2 is connected by the node address of MCU module 1 and MCU module 1, MCU module 1 can adopt STM32 high performance controller, computing machine 2 and MCU module 1 adopt RS485 bus to carry out data transmission, and use Modbus bus protocol, conventional Modbus debugging software is installed on the computer 2 and can sends corresponding control word according to Modbus standard bus protocol to MCU module 1; After MCU module 1 pair of control word is resolved, the switching command of correspondence is sent to audio switch chip AS1747, audio switch chip AS1747 is according to switching command, by the first audio frequency apparatus 4 or the second audio frequency apparatus 5 is switched on the passage corresponding with standard signal test source 3, set up audio frequency apparatus and be connected with the audio frequency of standard signal test source.Because an audio switch chip AS1747 comprises two groups of switching channels, as long as so the quantity of extended audio switch chip AS1747 just can increase the quantity of the audio frequency apparatus that will switch.
Composition graphs 2 is with shown in Fig. 3, during actual use, MCU module 1 is placed in a-b box 13 with audio switch chip AS1747, LED charactron 7, the case face that status indicator lamp 8 and toggle switch 6 are located at a-b box 13 conveniently arranges and observes, the case face of a-b box 13 is also provided with power interface 9, audio input interface 10, audio output interface 11 and computer interface 12, by the power supply that power interface 9 connection is powered for this switching device shifter, the connection of different audio frequency apparatuses and audio switch chip AS1747 is realized by audio input interface 10, the connection of standard signal test source 3 and audio switch chip AS1747 is realized by audio output interface 11, audio input interface 10 and audio output interface 11 all adopt standard DB44 interface, the connection of computing machine 2 and MCU module 1 is realized by computer interface 12, module integration is in a-b box 13, conveniently install and carry.
The ultralow on state resistance that audio switch chip AS1747 has 0.4 Ω concurrently mates with the splendid interchannel being less than 0.03 Ω, thus it is minimum that interchannel signal difference is down to.In addition, audio switch chip AS1747 also has the conducting resistance flatness of 0.25 Ω, makes total harmonic distortion be down to only 0.01%, can obtain splendid sound signal quality.
This switching device shifter structure is simple, and the sound signal that can realize rapidly between different audio frequency apparatus and standard measuring signal source switches, and avoids common relay and analogue quantity switch in handoff procedure, cause the problem of sound signal distortion, ensures communication quality.
The above is only preferred embodiment of the present utility model, not does any pro forma restriction to the utility model; Any those of ordinary skill in the art, do not departing under technical solutions of the utility model ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Therefore; every content not departing from technical solutions of the utility model; according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent replacement, equivalence change and modification, all still belong in the scope of technical solutions of the utility model protection.
Claims (4)
1. an audio-frequency signal switching device, it is characterized in that, described switching device shifter comprises MCU module (1), the input interface of MCU module (1) connects computing machine (2), output interface connects audio switch chip AS1747, and the switching command that computing machine (2) sends is sent to audio switch chip AS1747 by MCU module (1); The input channel of audio switch chip AS1747 connects one group of audio frequency apparatus respectively, output channel connection standard signal testing source (3).
2. a kind of audio-frequency signal switching device according to claim 1, is characterized in that, described MCU module (1) is connected with the toggle switch (6) for arranging MCU module (1) node address.
3. a kind of audio-frequency signal switching device according to claim 2, is characterized in that, described MCU module (1) is connected with the LED charactron (7) for showing MCU module (1) node address.
4. a kind of audio-frequency signal switching device according to claim 1,2 or 3, is characterized in that, described audio switch chip AS1747 is connected with the status indicator lamp (8) for display channel state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804555.7U CN204287861U (en) | 2014-12-18 | 2014-12-18 | A kind of audio-frequency signal switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804555.7U CN204287861U (en) | 2014-12-18 | 2014-12-18 | A kind of audio-frequency signal switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204287861U true CN204287861U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420804555.7U Expired - Fee Related CN204287861U (en) | 2014-12-18 | 2014-12-18 | A kind of audio-frequency signal switching device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204287861U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503322A (en) * | 2014-12-18 | 2015-04-08 | 姜斯平 | Audio signal switching device |
| CN110231786A (en) * | 2019-05-16 | 2019-09-13 | 杭州众传数字设备有限公司 | A kind of MCVF multichannel voice frequency switch |
-
2014
- 2014-12-18 CN CN201420804555.7U patent/CN204287861U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503322A (en) * | 2014-12-18 | 2015-04-08 | 姜斯平 | Audio signal switching device |
| CN110231786A (en) * | 2019-05-16 | 2019-09-13 | 杭州众传数字设备有限公司 | A kind of MCVF multichannel voice frequency switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |