CN106888306B - A kind of simulated voice handle for test - Google Patents
A kind of simulated voice handle for test Download PDFInfo
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- CN106888306B CN106888306B CN201710198261.2A CN201710198261A CN106888306B CN 106888306 B CN106888306 B CN 106888306B CN 201710198261 A CN201710198261 A CN 201710198261A CN 106888306 B CN106888306 B CN 106888306B
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- resistance
- speech
- optocoupler
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a kind of simulated voice handles for test, it include: voice encoding/decoding chip, permalloy audio-frequency transformer, T-type attenuator and optocoupler, two groups of transformers are equipped in permalloy audio-frequency transformer, impedance ratio is respectively 150 Ω: 150 Ω, 600 Ω: 600 Ω, and the input terminal of two groups of transformers is with respectively having a terminal welding system；Output end respectively has a terminal, and ungrounded end is respectively MIC, PHONE lead with answering sound handle；Speech handle and systematically between pass through capacitance connection；T-type attenuator includes resistance R1, R2 and R3, the end AO of resistance R2 first end connection voice encoding/decoding chip, resistance R2 second end is separately connected the first end of resistance R1, R3, resistance R3 second end ground connection, resistance R1 second end connects the ungrounded end of 150 Ω: 150 Ω transformer inputs in permalloy audio-frequency transformer, and the ungrounded end of 600 Ω: 600 Ω transformer inputs in permalloy audio-frequency transformer is connected to the end AI of voice encoding/decoding chip；One output end of optocoupler is PTT lead.
Description
Technical field
The present invention relates to Speech Communication control class product, test class product more particularly to a kind of simulation words for test
Sound handle.
Background technique
Speech handle is the electrophone equipment used for backpack or vehicular coordinative composition of equipments, have send words, it is called,
The functions such as PTT.Speech handle mostly uses greatly passive design, has the circuits such as feed, signal condition in equipment end design, to speech hand
Handle is powered filtering with voice signal, enhanced processing.Currently, for the test and use of speech handle interface, mostly also
It is the quality for testing handle interface in such a way that people propagandas directed to communicate to microphone, there is no preferable automatic test and simulation means.
As the lightness of various types of vehicles develops, interior space becomes smaller, the miniaturization of equipment, it is integrated have become development trend, it is former
A case where interior equipment connects a speech handle will not exist yet, and be passed through centainly using 1 speech handle
Mechanism connect multiple equipment simultaneously.
However currently, it there is no effective replacement words when carrying out speaking test or a speech handle connection multiple equipment
The technological means of sound handle.
Summary of the invention
The present invention in view of the deficiency of the prior art, provides a kind of simulated voice handle for test, to obtain
Obtain good speech effect.
The technical scheme to solve the above technical problems is that a kind of simulated voice handle for test, comprising:
Voice encoding/decoding chip, permalloy audio-frequency transformer, T-type attenuator and optocoupler, wherein the permalloy audio transformation
Two groups of transformers are equipped in device, impedance ratio is respectively 150 Ω: 150 Ω, 600 Ω: 600 Ω, and the input terminal of two groups of transformers respectively has
One terminal welding system GND, ungrounded end be separately connected the voice encoding/decoding chip, the T-type attenuator；Output end is then
Respectively there is a terminal with answering sound handle AGND, ungrounded end is respectively MIC lead, PHONE lead；The speech handle
It is attached between AGND and the systematically GND by capacitor C1；The T-type attenuator includes resistance R1, R2 and R3,
In, the first end of resistance R2 connects the end AO of the voice encoding/decoding chip, and the second end of resistance R2 is separately connected resistance R1, R3
First end, the second end ground connection of resistance R3, the second end of resistance R1 connects 150 in the permalloy audio-frequency transformer
The ungrounded end of Ω: 150 Ω transformer inputs, 600 Ω: 600 Ω transformers in the permalloy audio-frequency transformer are defeated
The ungrounded end for entering end is then connected to the end AI of the voice encoding/decoding chip；The optocoupler there are two input terminal, one of them
Input terminal connection control IO, another input terminal are connected to+3.3V power supply by a resistance, and there are two outputs for the optocoupler
End, one of output end are the PTT signal lead of speech handle, and another output connects speech handle ground AGND.
Based on the above technical solution, the present invention can also be improved as follows.
Preferably, described resistance R1, R2 are 147 Ω, and R3 is 3 Ω.
Preferably, the capacitor C1 is 100uF.
Preferably, another input terminal of the optocoupler is connected to+3.3V power supply by the resistance that resistance value is 510 Ω.
Preferably, the optocoupler is MOSFET output photoelectric coupler AQW210.
Simulated voice handle for test of the invention devises T-type decaying in the output end of voice encoding/decoding chip
Device carries out impedance matching and sound attenuating to speech, believes in the transformer that the rear end of attenuator uses permalloy audio
Number it is isolated, using the key switch of the PTT of MOSFET output photoelectric coupler circuit simulated voice handle, closure, thus
Obtain good speech effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the simulated voice handle for test of the invention；
In the accompanying drawings, list of designations represented by each label is as follows:
100 voice encoding/decoding chips
200 permalloy audio-frequency transformers
300 T-type attenuators
400 optocouplers
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Please also refer to the structural schematic diagram for shown in Fig. 1, being the simulated voice handle for test of the invention.The words
Sound handle include: voice encoding/decoding chip (DAC chip) 100, permalloy audio-frequency transformer 200, T-type attenuator 300 and
Optocoupler 400, wherein
Two groups of transformers are equipped in the permalloy audio-frequency transformer 200, impedance ratio is respectively 150 Ω: 150 Ω, 600
Ω: 600 Ω, GND, ungrounded end are separately connected the speech and compile the input terminal of two groups of transformers with respectively having a terminal welding system
Decoding chip 100, the T-type attenuator 300；Output end then respectively has a terminal with answering sound handle AGND, ungrounded end point
It Wei not MIC (microphone, microphone) lead, PHONE (earphone, earpiece) lead；
The T-type attenuator 300 includes resistance R1, R2 and R3, wherein the first end of resistance R2 connects the speech and compiles solution
The end AO of code chip 100, the second end of resistance R2 are separately connected the first end of resistance R1, R3, the second end ground connection of resistance R3, electricity
The second end of resistance R1 connects the ungrounded of 150 Ω: 150 Ω transformer inputs in the permalloy audio-frequency transformer 200
It holds, the ungrounded end of 600 Ω: 600 Ω transformer inputs in the permalloy audio-frequency transformer 200 is then connected to described
The end AI of voice encoding/decoding chip 100；In general, the words sensitivity of sending of speech handle is 1mV/Pa, and voice encoding/decoding core
The level of piece output is much larger than this value, if the output signal at its end AO is directly connected with equipment, it will generates very
Big noise；And joined T-type attenuator in circuit after sound attenuating, impedance matching, then will can receive good speech effect
Fruit；The present invention is in the AO output end connecting T-shaped attenuator of voice encoding/decoding chip, and decay speech 40dB, due to speech handle
Typical input impedance be 150 Ω, therefore attenuator corresponding resistance representative value R1, R2 be 147 Ω, R3 be 3 Ω, but not as
Limit.
Speech handle by, to send words frequency range be 200Hz~4000Hz, common transformer is isolated under this frequency
Effect is poor, and voice distortion is serious after isolation；Thus, it is desirable to be isolated using permalloy audio-frequency transformer.Speech hand
It AGND and is systematically attached by capacitor C1 between GND to handle, the representative value of capacitor C1 is 100uF.This Isolation
Mode ensure that normal Speech Communication, and can effectively eliminate that multiple devices connect and bring interacts,
The noise for being mutually coupled and generating is eliminated, there is good speech effect.
There are two input terminal, one of input terminal connection control IO, another input terminals to pass through an electricity for the optocoupler 400
Resistance is connected to+3.3V power supply, which is preferably 510 Ω；There are two output end, one of output end is the optocoupler 400
The PTT signal lead of speech handle, another output connect speech handle ground AGND.When controlling IO is high level, PTT letter
Number be vacant state；When controlling IO is low level, PTT signal is connected with AGND, reaches and is opened by IO control simulation PTT
It closes, the effect of closure.The simulated voice handle for test of the invention is with four leads as a result: MIC, speech handle
AGND, PHONE and PTT.The optocoupler 400 may be, for example, MOSFET output photoelectric coupler AQW210, and but not limited to this；
The not only small in size, simple structure of this design, but also have many advantages, such as high reliablity, fast response time.
Current most of speech handles by, to send words frequency range be 200Hz~4000Hz；Sending words impedance is 150 Ω left
Words sensitivity 1mV/Pa is sent on the right side, and called impedance is 600 Ω or so, and called sensitivity is not less than 85dB/mW.The present invention is according to this
Kind characteristic devises T-type attenuator in the output end of voice encoding/decoding chip, carries out impedance matching and sound attenuating to speech；In
Audio signal is isolated in the transformer that the rear end of attenuator uses permalloy, uses MOSFET output photoelectric coupler
The key switch of the PTT of breadboardin speech handle, closure.
The present invention mainly has following characteristics:
1, impedance matching is carried out using T-type attenuator and voice volume is adjusted
The innovative point has the active effect that
Since the speech that the receiver of traditional voice handle is sent out is faint in the extreme, need to amplify in equipment end, and
If the audio signal of DAC chip output is directly connected with equipment, since the mismatch and audio signal of impedance pass through equipment
After internal amplifying circuit amplification, it will generate saturation, generate very big noise；T-type attenuator be joined in circuit by sound
After sound decaying, good speech effect can be received.
2, it is isolated using the transformer of permalloy
The innovative point has the active effect that
When the speech handle interface of multiple equipment links together, the noise of equipment can pass through the earth signal of speech handle
It is coupled, so that noise is generated, and the words sensitivity of sending of speech handle is 1mV/Pa, somewhat noise will be to speech
Generate large effect；Voice signal MIC and PHONE are isolated the present invention using the audio-frequency transformer of permalloy, will
Audio earth signal AGND and systematically GND by together with capacitance connection；This Isolation mode ensure that normal
Speech colleague, and can effectively eliminate that multiple devices connect and bring interacts, eliminate due to being mutually coupled
The noise of generation has good speech effect.
3, PTT is simulated using MOSFET output photoelectric coupler circuit
The innovative point has the active effect that
The PTT signal of speech handle is usually suspended state, be connected to ground after pressing together, in order to increase reliability and
Stability is carried out the switch of simulated voice handle PTT key using MOSFET output photoelectric coupler, is closed, not only small in size,
Simple structure, and have many advantages, such as that high reliablity, corresponding speed are fast.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of simulated voice handle for test characterized by comprising voice encoding/decoding chip, permalloy audio
Transformer, T-type attenuator and optocoupler, wherein
Two groups of transformers are equipped in the permalloy audio-frequency transformer, impedance ratio is respectively 150 Ω: 150 Ω, 600 Ω: 600
Ω, GND, ungrounded end are separately connected the voice encoding/decoding core to the input terminal of two groups of transformers with respectively having a terminal welding system
Piece, the T-type attenuator；Output end then respectively has a terminal with answering sound handle AGND, ungrounded end be respectively MIC lead,
PHONE lead；It is attached between AGND and the systematically GND by capacitor C1 to the speech handle；
The T-type attenuator includes resistance R1, R2 and R3, wherein the first end of resistance R2 connects the voice encoding/decoding chip
The end AO, the second end of resistance R2 is separately connected the first end of resistance R1, R3, the second end ground connection of resistance R3, the of resistance R1
Two ends connect the ungrounded end of 150 Ω: 150 Ω transformer inputs in the permalloy audio-frequency transformer, the perm
The ungrounded end of 600 Ω: 600 Ω transformer inputs in alloy audio-frequency transformer is then connected to the voice encoding/decoding chip
The end AI；
There are two input terminal, one of input terminal connection control IO, another input terminals to be connected by a resistance for the optocoupler
To+3.3V power supply, for the optocoupler there are two output end, one of output end is the PTT signal lead of speech handle, another
A output end connection speech handle ground AGND.
2. speech handle according to claim 1, which is characterized in that described resistance R1, R2 are 147 Ω, and R3 is 3 Ω.
3. speech handle according to claim 1 or 2, which is characterized in that the capacitor C1 is 100uF.
4. speech handle according to claim 1 or 2, which is characterized in that another input terminal of the optocoupler passes through resistance
Value is that the resistance of 510 Ω is connected to+3.3V power supply.
5. speech handle according to claim 3, which is characterized in that another input terminal of the optocoupler is by resistance value
The resistance of 510 Ω is connected to+3.3V power supply.
6. speech handle according to claim 1 or 2, which is characterized in that the optocoupler is the coupling of MOSFET output photoelectric
Device AQW210.
7. speech handle according to claim 3, which is characterized in that the optocoupler is MOSFET output photoelectric coupler
AQW210。
8. speech handle according to claim 4, which is characterized in that the optocoupler is MOSFET output photoelectric coupler
AQW210。
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| CN201710198261.2A CN106888306B (en) | 2017-03-29 | 2017-03-29 | A kind of simulated voice handle for test |
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| CN201710198261.2A CN106888306B (en) | 2017-03-29 | 2017-03-29 | A kind of simulated voice handle for test |
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| CN106888306A CN106888306A (en) | 2017-06-23 |
| CN106888306B true CN106888306B (en) | 2019-11-19 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4541040A (en) * | 1983-11-21 | 1985-09-10 | Doble Engineering Company | Power converting |
| CN201852564U (en) * | 2010-01-12 | 2011-06-01 | 武汉烽火富华电气有限责任公司 | Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding |
| CN202978961U (en) * | 2012-12-24 | 2013-06-05 | 中国电子科技集团公司第五十四研究所 | Ultra-low speed wireless communication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8901853B2 (en) * | 2012-07-11 | 2014-12-02 | Analog Devices, Inc. | Multi-string LED drive system |
-
2017
- 2017-03-29 CN CN201710198261.2A patent/CN106888306B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4541040A (en) * | 1983-11-21 | 1985-09-10 | Doble Engineering Company | Power converting |
| CN201852564U (en) * | 2010-01-12 | 2011-06-01 | 武汉烽火富华电气有限责任公司 | Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding |
| CN202978961U (en) * | 2012-12-24 | 2013-06-05 | 中国电子科技集团公司第五十四研究所 | Ultra-low speed wireless communication device |
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| CN106888306A (en) | 2017-06-23 |
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