CN1038523A - Cable core check mark device circuit improves - Google Patents
Cable core check mark device circuit improves Download PDFInfo
- Publication number
- CN1038523A CN1038523A CN 88103693 CN88103693A CN1038523A CN 1038523 A CN1038523 A CN 1038523A CN 88103693 CN88103693 CN 88103693 CN 88103693 A CN88103693 A CN 88103693A CN 1038523 A CN1038523 A CN 1038523A
- Authority
- CN
- China
- Prior art keywords
- circuit
- cable core
- potentiometer
- signal output
- diode
- 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.)
- Withdrawn
Links
- 230000006698 induction Effects 0.000 claims abstract description 4
- 230000005236 sound signal Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
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- Monitoring And Testing Of Exchanges (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention is that cable core check mark device circuit improves, and relates to electricity field.Existing buzzerphone adopts the induction type circuit, when heart yearn is differentiated, is to differentiate by the height of output signal.The present invention connects an electronic door circuit at audio signal output end, when cable core is differentiated, if with single line signal output is arranged then, if not with then no signal output of single line.
Description
Cable core check mark device circuit improves, and relates to electricity field, is specially adapted to the check mark of cable core.
Existing " buzzerphone " adopts the induction type circuit, promptly is made of audio oscillator circuit, when check and correction cable core line preface, utilizes the power of induction AC signal to judge whether to be same heart yearn.Its weak point is: bigger to survey cable line capacitance, when insulation resistance was low, positive and negative signal difference was less, was difficult for signing not.To the telephone cable in using, during to line, owing to existence ± 60V(or 48V on the bus) direct current is by battery, and formation buzzerphone sound signal loop does not reduce positive and negative beat, makes the line difficulty.
The object of the invention is to solve above-mentioned weak point of the prior art, and by at output signal termination one electronic gate, making has signal output when connecing same heart yearn, during non-same heart yearn, and no signal output.
The present invention improves as follows:
The present invention is output line circle termination one electronic door circuit at audio oscillator circuit, and electronic door circuit is by diode D
1, two triode T
1, T
2And resistance R
7Potentiometer W constitutes, and output line circle (3) meets diode D
1Negative pole, (4) termination triode T
1Collector, T
1Base stage connecting resistance R
7An end, resistance R
7The other end link to each other T with potentiometer W
1Emitter connect battery cathode, triode T
2Collector connect battery cathode, T
2Base electrode connect anode, T
2Emitter and diode
, potentiometer W is connected to the sound line output terminal mutually.
The invention will be further described below in conjunction with symbol figure:
Show T as accompanying drawing
2For power amplification integrated package LA4100, be used to cooperate other Resistor-Capacitor Unit, the audio frequency oscillator about component frequency 300HZ is got and is decided 300HZ, and purpose is to distinguish the dialing sound of local call 450HZ, and B is an output transformer, T
1Be 3DG6 transistor, D
1Be the 2CP12 diode.
During test, an end uses buzzerphone of the present invention, and the other end uses common monophone, when not finding same heart yearn as yet, and D
1AC signal rectification by the interelectrode capacity coupling is come oppositely is added to T
1Base stage, make T
1End, give certain door territory voltage, the sound line can not send sound signal when guaranteeing not last same heart yearn.When both sides find same heart yearn,
Terminal+6V is added on the sound line, makes T
1Base stage and collector obtain positive potential, T simultaneously
1Conducting, sound signal is exported by the sound line.
Claims (2)
1, cable core check mark device circuit improves, existing buzzerphone adopts the induction type circuit, promptly constitute by an audio oscillator circuit, the present invention is characterised in that, output line circle termination one electronic door circuit at audio oscillator circuit, making has signal output when connecing same heart yearn, during non-same heart yearn, and no signal output.
2, buzzerphone circuit according to claim 1 improves, and it is characterized in that electronic door circuit is by diode D
1, two triode T
1, T
2And resistance R
7, potentiometer W constitutes, output line circle (3) meets diode D
1Negative pole, (4) termination triode T
1Collector, T
1Base stage connecting resistance R
7An end, resistance R
7The other end link to each other T with potentiometer W
1Emitter meet battery cathode triode T
2Collector connect battery cathode, T
2Base electrode connect anode, T
2Emitter and diode D
1, potentiometer W is connected to the sound line output terminal mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103693 CN1015207B (en) | 1988-06-15 | 1988-06-15 | Improvement of circuit for cable core wires identifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88103693 CN1015207B (en) | 1988-06-15 | 1988-06-15 | Improvement of circuit for cable core wires identifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1038523A true CN1038523A (en) | 1990-01-03 |
| CN1015207B CN1015207B (en) | 1991-12-25 |
Family
ID=4832709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88103693 Expired CN1015207B (en) | 1988-06-15 | 1988-06-15 | Improvement of circuit for cable core wires identifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015207B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307817A (en) * | 2018-10-24 | 2019-02-05 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of cable electrification identifier and recognition methods |
| CN109579665A (en) * | 2018-12-24 | 2019-04-05 | 上海起帆电缆股份有限公司 | Metal tape armour gap measuring method |
-
1988
- 1988-06-15 CN CN 88103693 patent/CN1015207B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307817A (en) * | 2018-10-24 | 2019-02-05 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of cable electrification identifier and recognition methods |
| CN109307817B (en) * | 2018-10-24 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司柳州局 | Cable live identification instrument and identification method |
| CN109579665A (en) * | 2018-12-24 | 2019-04-05 | 上海起帆电缆股份有限公司 | Metal tape armour gap measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1015207B (en) | 1991-12-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |