CN105898652A - Sound playing matching circuit - Google Patents
Sound playing matching circuit Download PDFInfo
- Publication number
- CN105898652A CN105898652A CN201610229367.XA CN201610229367A CN105898652A CN 105898652 A CN105898652 A CN 105898652A CN 201610229367 A CN201610229367 A CN 201610229367A CN 105898652 A CN105898652 A CN 105898652A
- Authority
- CN
- China
- Prior art keywords
- playback
- circuit
- cable core
- buzzer
- audio
- 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.)
- Pending
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
The invention provides a sound playing matching circuit comprising a sound playing end (1), a receiving end (2), and a cable core wire (3). The sound playing end (1) comprises a buzzer (11) and an earphone (12). The receiving end (2) comprises an audio frequency amplification circuit (22). The first end of the audio frequency amplification circuit (22) is connected with a cable shielding layer or the public wire of the cable core wire (3), and the second end of the audio frequency amplification circuit (22) is connected with the contact line (33) of the cable core wire (3), and in addition, the contact line (33) is parallely connected with a testing line (34). The problem of the prior art that the sound heard via a sound playing receiving end by the earphone is flawed is solved, and therefore the working efficiency is improved, and the user experience is improved.
Description
Technical field
The present invention relates to the communications field, especially relate to a kind of playback number check circuit.
Background technology
Buzzerphone is applicable to general communication cable, signal cable is checked the number at construction, maintenance process SMIS line ordering and finds certain line
To operation.And in use can also judge whether cable core exists the events such as broken string, swinging cross, ground connection the most easily
Barrier.
BSF-3E type local cable dress with playback buzzerphone be called for short buzzing buzzerphone, be primarily adapted for use in local line construction, safeguard,
Distribute telephone numbers cutover time the indispensable supplementary instrument of lineman.It can be hung several earphones on cross-connecting box junction box simultaneously get in touch with, with
Ensure accurate to line effect, the most easily complete thousands of lineman being made to cable core at cable two ends.Buzzerphone is at electricity
Choosing on road and use low power consumption integrated circuit, miniaturization high-quality electronics, without device, makes this product have low consumption, high-performance, volume
Little, lightweight, the feature of simple operation.Apparatus structure is the most novel, firm dependable performance, is communication engineering line crew
Requisite instrumentation instrument.
At present, it is to utilize buzzer audio playback method that cable cores is checked the number, and Fig. 1 is according to the buzzer panel in correlation technique
Figure and the schematic diagram of buzzer playback number check circuit, as it is shown in figure 1, playback end buzzer " " terminal is connected to electricity
On good line on cable screen layer or in cable core (title common line), " saying " terminal of buzzer connects earphone one end, ear
The other end of machine connects good heart yearn (title interconnection) in cable, and " sound " terminal on buzzer connects the wanted playback of cable core
(claim playback line) on heart yearn, terminate the good line (common line) in cable shield or cable core at receiving terminal the one of earphone,
The other end of earphone connects the good heart yearn (interconnection) in cable, a p-wire (also referred to as touching line) in parallel on interconnection.
Finding out from this, first end playback, second end audition is earphone, and volume is little be can't hear, and the ear that given great volume be can't stand, one day
Work is got off, the most arduous.
For passing through the earphone problem at playback receiving terminal audition existing defects in correlation technique, prior art does not also propose effectively
Solution.
Summary of the invention
Object of the present invention is to provide the low noise communication apparatus that can dispel the heat, solve in correlation technique and received in playback by earphone
The problem of end audition existing defects.
The invention provides a kind of playback number check circuit, including playback end (1), receiving terminal (2), cable core (3), wherein,
Described playback end (1) including: buzzer (11), earphone (12), the ground terminal of described buzzer (11) and described cable screens
The common line covering layer or described cable core (3) connects, described buzzer (11) say the of terminal and described earphone (12)
One end connects, and described in the second end of described earphone (12), the interconnection (33) of cable core (3) connects, described buzzer (11)
Sound terminal be connected with the playback line (31) of described cable core (3)；Described receiving terminal (2) including: audio amplifier circuit
(22), the first end of described audio amplifier circuit (22) and described cable shield or the common line of described cable core (3)
Connecting, the second end of described audio amplifier circuit (22) is connected with the interconnection (33) of described cable core (3), described
A piece p-wire (34) of parallel connection gone up by winding thread (33).
Further, described audio-frequency amplifier circuit is made up of pre-amplification circuit and audio power amplifying circuit, wherein, described
The input of pre-amplification circuit is connected with the p-wire (34) of described receiving terminal (2), outfan and described Audio power amplifier electricity
The audio input end on road connects.
Further, the chip model that pre-amplification circuit uses is LM358AD.
Further, the chip model of described audio power amplifying circuit is LM386.
By the playback number check circuit of the present invention, including playback end (1), receiving terminal (2), cable core (3), wherein, institute
State playback end (1) to include: buzzer (11), earphone (12), the ground terminal of described buzzer (11) and described cable shield
Layer or described cable core (3) common line connect, described buzzer (11) say the first of terminal and described earphone (12)
End connects, and described in the second end of described earphone (12), the interconnection (33) of cable core (3) connects, described buzzer (11)
Sound terminal be connected with the playback line (31) of described cable core (3)；Described receiving terminal (2) including: audio amplifier circuit
(22), the first end of described audio amplifier circuit (22) and described cable shield or the common line of described cable core (3)
Connecting, the second end of described audio amplifier circuit (22) is connected with the interconnection (33) of described cable core (3), described
Winding thread (33) is a upper in parallel p-wire (34), is solved to be existed at playback receiving terminal audition by earphone in correlation technique and lacks
The problem fallen into, improves work efficiency, improves Consumer's Experience.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the buzzer panel figure in correlation technique and the schematic diagram of buzzer playback number check circuit；
Fig. 2 is the schematic diagram of playback number check circuit according to embodiments of the present invention；
Fig. 3 is the schematic diagram of audio-frequency amplifier circuit according to the preferred embodiment of the invention；
Fig. 4 is the schematic diagram of pre-amplification circuit according to the preferred embodiment of the invention.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the case of not conflicting,
Embodiment in the application and the feature in embodiment can be mutually combined.
Providing a kind of playback number check circuit in the present embodiment, Fig. 2 is showing of playback number check circuit according to embodiments of the present invention
Being intended to, as in figure 2 it is shown, include playback end 1, receiving terminal 2, cable core 3, wherein, described playback end 1 includes: buzzing
Device 11, earphone 12, the ground terminal of described buzzer 11 is connected with the common line of described cable shield or described cable core 3,
Described buzzer 11 say that terminal is connected with the first end of described earphone 12, cable core 3 described in the second end of described earphone 12
Interconnection 33 connect, the sound terminal of described buzzer 11 is connected with the playback line 31 of described cable core 3；Described receiving terminal
2 include: audio amplifier circuit 22, the first end of described audio amplifier circuit 22 and described cable shield or described cable core
The common line of 3 connects, and the second end of described audio amplifier circuit 22 is connected with the interconnection 33 of described cable core 3, described
A p-wire 34 in parallel on winding thread 33.
Fig. 3 is the schematic diagram of audio-frequency amplifier circuit according to the preferred embodiment of the invention, as it is shown on figure 3, described audio frequency amplifies
Device circuit is made up of pre-amplification circuit and audio power amplifying circuit, and wherein, the input of described pre-amplification circuit is with described
The p-wire of receiving terminal connects, and outfan is connected with the audio input end of described audio power amplifying circuit.
Fig. 4 is the schematic diagram of pre-amplification circuit according to the preferred embodiment of the invention, and as shown in Figure 4, front end circuit parameter is selected
Select: because it is more weak to be transferred to second end signal from first end playback line, so one-level pre-amplification circuit to be added.Preamplifier inputs
End is the p-wire connecting playback receiving terminal, and lead-out terminal is the audio input end connecting audio power amplifying circuit.Optional at one
Example in, pre-amplification circuit use chip model be LM358AD, i.e. preamplifier chip use LM358AD collection
Become double operational.VCC is supply voltage 4～12 volts, and VEE is ground terminal (power cathode).R6=1K, R7 are 2K current potential
Device, R8=10K, amplifying circuit is voltage profound and negative feedbck, and output voltage stabilization, amplifier characteristic is fine.
In another optional embodiment, the chip model of described audio power amplifying circuit is LM386.Audio power amplifier
Circuit uses LM386 chip, and LM386 chip is the audio power amplifier that National Semiconductor produces.It
Amplification is 20 to 200 times, and quiescent dissipation is little, namely power saving, is suitable for battery supply set.
LM386 chip has eight pins, and 6 feet are positive sources, and 4 feet are ground terminal (power cathode), and 2 feet are anti-phase inputs
(INPUT), 3 feet are to input mutually (INPUT), and 5 feet are output (VOUT), and 7 feet are bypass interfaces, and 1 foot and 8 feet are gains
Arranging end, as it can be seen, 1 foot and 8 feet are unsettled, amplification is 20 times.1 foot and 8 feet add 10 μ F electric capacity, put
Big multiple is 200 times, as arranged 50,100,150 times, then in 10 one resistance of μ F capacitances in series, resistance size and amplification
Multiple is inversely proportional to.
Playback number check circuit just can carry out playback check mark, playback end playback line discharge signal after setting up, and goes with touching line at receiving terminal
Touch cable core, in touching heart yearn, heard sound when a certain, illustrate that line to be checked the number finds.Receiving terminal to lead to
Know that this line of playback end is tested, single line playback under playback end interchangeable, so circulate until whole lines are to testing,
Typically check the number one by one from trumpet to large size it should be noted that playback is checked the number.
The embodiment of the present invention, in traditional buzzer playback circuit, is improved to be made up of operational amplifier by the earphone of receiving terminal
Amplifier circuit, improve playback work sensitivity, reduce the labor intensity of communication staff, can be in actual work
Widely popularize.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., within protection scope of the present invention all should being included in.
Claims (4)
1. a playback number check circuit, it is characterised in that include playback end (1), receiving terminal (2), cable core (3), wherein,
Described playback end (1) including: buzzer (11), earphone (12), the ground terminal of described buzzer (11) and institute
The common line stating cable shield or described cable core (3) connects, described buzzer (11) say terminal and described ear
First end of machine (12) connects, and the interconnection (33) of cable core (3) described in the second end of described earphone (12) is even
Connecing, the sound terminal of described buzzer (11) is connected with the playback line (31) of described cable core (3)；
Described receiving terminal (2) including: audio amplifier circuit (22), the first end of described audio amplifier circuit (22) with
The common line of described cable shield or described cable core (3) connects, the second end of described audio amplifier circuit (22)
Being connected with the interconnection (33) of described cable core (3), described interconnection (33) goes up a piece p-wire (34) of parallel connection.
Playback number check circuit the most according to claim 1, it is characterised in that described audio-frequency amplifier circuit is amplified electricity by preposition
Road and audio power amplifying circuit composition, wherein, the input of described pre-amplification circuit and the survey of described receiving terminal (2)
Examination line (34) connects, and outfan is connected with the audio input end of described audio power amplifying circuit.
Playback number check circuit the most according to claim 2, it is characterised in that the chip model that pre-amplification circuit uses is
LM358AD。
Playback number check circuit the most according to claim 2, it is characterised in that the chip model of described audio power amplifying circuit
For LM386.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229367.XA CN105898652A (en) | 2016-04-13 | 2016-04-13 | Sound playing matching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229367.XA CN105898652A (en) | 2016-04-13 | 2016-04-13 | Sound playing matching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105898652A true CN105898652A (en) | 2016-08-24 |
Family
ID=56703735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610229367.XA Pending CN105898652A (en) | 2016-04-13 | 2016-04-13 | Sound playing matching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105898652A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048194U (en) * | 1989-06-16 | 1989-11-22 | 邱礼儒 | Multi-functional check the number appliance for cable |
| CN2234096Y (en) * | 1995-08-26 | 1996-08-28 | 靳青松 | Multi-core cable quick tracer |
| CN2270976Y (en) * | 1994-10-14 | 1997-12-17 | 黄琼标 | Electric cable tester |
| CN2453452Y (en) * | 2000-12-02 | 2001-10-10 | 向贵伦 | Cable detecting instrument |
| CN2802880Y (en) * | 2005-05-13 | 2006-08-02 | 李仕清 | Portable loudspeaker box |
| US20090051427A1 (en) * | 2007-08-20 | 2009-02-26 | Rohm Co., Ltd. | Output limiting circuit, class d power amplifier and audio equipment |
| CN204065308U (en) * | 2014-09-12 | 2014-12-31 | 广西电网公司南宁供电局 | A kind of polycore cable is to line and fault detection system |
-
2016
- 2016-04-13 CN CN201610229367.XA patent/CN105898652A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048194U (en) * | 1989-06-16 | 1989-11-22 | 邱礼儒 | Multi-functional check the number appliance for cable |
| CN2270976Y (en) * | 1994-10-14 | 1997-12-17 | 黄琼标 | Electric cable tester |
| CN2234096Y (en) * | 1995-08-26 | 1996-08-28 | 靳青松 | Multi-core cable quick tracer |
| CN2453452Y (en) * | 2000-12-02 | 2001-10-10 | 向贵伦 | Cable detecting instrument |
| CN2802880Y (en) * | 2005-05-13 | 2006-08-02 | 李仕清 | Portable loudspeaker box |
| US20090051427A1 (en) * | 2007-08-20 | 2009-02-26 | Rohm Co., Ltd. | Output limiting circuit, class d power amplifier and audio equipment |
| CN204065308U (en) * | 2014-09-12 | 2014-12-31 | 广西电网公司南宁供电局 | A kind of polycore cable is to line and fault detection system |
Non-Patent Citations (2)
| Title |
|---|
| 张思连: "《通信电缆线路及常见故障》", 31 March 1995 * |
| 郑州铁路局: "《光、电缆维修及工程施工》", 31 July 2000 * |
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| PB01 | Publication | ||
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Application publication date: 20160824 |