CN1376929A - Monitor of electric cable breaking and its method - Google Patents
Monitor of electric cable breaking and its method Download PDFInfo
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- CN1376929A CN1376929A CN 02114757 CN02114757A CN1376929A CN 1376929 A CN1376929 A CN 1376929A CN 02114757 CN02114757 CN 02114757 CN 02114757 A CN02114757 A CN 02114757A CN 1376929 A CN1376929 A CN 1376929A
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Abstract
A device for monitoring the broken line in cable is composed of signal source, transformer with its primary winding connected to the output of signal source and the input of load detector and its secondary winding connected with at least one pair of core lines in the cable, load detector connected between primary winding of transformer and input of broken lind judging circuit, broken line judging circuit connected between load detector and warning circuit, and warning circuit. Its advantages are simple structure, low cost and high practicality.
Description
Technical field
The invention belongs to the cable communication field, particularly relate to a kind of monitor of electric cable breaking and method thereof that is used to detect the break-make situation of differentiating cable line.
Background technology
High speed development along with modern communications, the various types of communication circuit is more and more, and the complexity of arranging net, and along with the development in city, the excavation of urban road also increases day by day, elemental influence such as storm wind heavy rain causes communication cable to be scraped disconnected phenomenon to make communication line not only be subjected to freely, also being subjected to stealing various artificial factor such as cable as road excavation and robber causes communication cable to be scraped disconnected phenomenon, influence the service of whole communication network, but how could in time grasp the break-make situation of various communication cables reliably, also rest at present and have only on this inefficient level of handling of the break-make of when user's service goes wrong, just going site inspection to judge communication line by some specific purpose tools, do not catch up with the development of communication, influence the service quality of whole communication.
Summary of the invention
The objective of the invention is the problem at above-mentioned existence, a kind of simple in structure, with low cost, monitor of electric cable breaking and the method thereof that can in time grasp the break-make situation of understanding telecommunication cable reliably is provided, this monitor of electric cable breaking comprises:
Signal source is used to produce the input end that oscillator signal is supplied with the former limit of transformer;
Transformer, the former limit of described transformer is connected with the output terminal of signal source and the input end of load detecting circuit respectively, and its secondary connects at least one pair of cable core in the monitored cable respectively, and the load end short circuit of this cable core;
Load detecting circuit is connected between the input end of the former limit output terminal of transformer and the judging circuit that breaks, and is used to detect the load variations of transformer secondary;
The broken string judging circuit is connected load detecting circuit and alarms between the output circuit, and whether the load end that is used for differentiating according to the load variations of the detected transformer secondary of load detecting circuit the transformer secondary is in off-state;
The alarm output circuit is connected the output terminal of broken string judging circuit, is used to export the alarm signal that the load end of indication transformer secondary has disconnected.
The method of cable break monitoring of the present invention may further comprise the steps:
1), with an end short circuit of at least one pair of cable core in the monitored cable, and its other end is connected with the secondary of transformer, make monitored cable core become the load of transformer secondary;
2), the input end with the former limit of transformer is connected with signal source, the former limit output terminal of transformer is connected with the load detecting the judging circuit whether load that detects transformer secondary load variations and differentiation transformer secondary opens circuit, differentiates the load of determining the transformer secondary by the load variations that detects the transformer secondary and whether open circuit.
The present invention is owing to choose the secondary load of a pair or more of cable core as transformer dexterously in communication cable, judge by the secondary load that detects transformer whether communication cable breaks, thereby in time grasp the break-make situation of whole piece communication cable reliably, better for the user provides quality services, and the present invention is simple in structure, with low cost, practical.
Describe basic composition of the present invention and principle of work in detail below in conjunction with accompanying drawing:
Description of drawings
Fig. 1 is a circuit block diagram synoptic diagram of the present invention;
Fig. 2 is an electric principle schematic of the present invention.
Embodiment
As Fig. 1～shown in Figure 2, the present invention includes:
Signal source is used to produce the input end that oscillator signal is supplied with the former limit of transformer, and signal source adopts oscillator in the present embodiment;
Transformer, the former limit of described transformer is connected with the output terminal of signal source and the input end of load detecting circuit respectively, and its secondary connects at least one pair of cable core in the monitored cable respectively, and the load end short circuit of this cable core;
Wherein an enough strong input signal is arranged for the former limit that guarantees transformer, be provided with driving circuit between above-mentioned transformer and the signal source, this driving circuit is connected between the former limit input end of the output terminal of signal source and transformer, flows to the input end on the former limit of transformer after being used for the oscillator signal that signal source produces amplified again.
Load detecting circuit is connected between the input end of the former limit output terminal of transformer and the judging circuit that breaks, and is used to detect the load variations of transformer secondary; Wherein for making the detection signal that enters the broken string judging circuit stable, reliable, be provided with current rectifying and wave filtering circuit between above-mentioned load detecting circuit and the broken string judging circuit, this current rectifying and wave filtering circuit carries out the signal of the detected load variations of load detecting circuit to deliver to the broken string judging circuit again behind the rectifying and wave-filtering.
The broken string judging circuit is connected load detecting circuit and alarms between the output circuit, and whether the load end that is used for differentiating according to the load variations of the detected transformer secondary of load detecting circuit the transformer secondary is in off-state;
The alarm output circuit, the output terminal that it is connected the broken string judging circuit is used to export the alarm signal that the load end of indication transformer secondary has disconnected.
Wherein the oscillator described in the present invention, driving circuit, load detecting circuit, broken string identification circuit all can utilize prior art, its structure is formed varied, general those of ordinary skill all can promptly can not realized by creative work, its all structure no longer is described in detail in detail herein to be formed, basic composition and principle of work in the present embodiment are only described, in the present embodiment, oscillator is by comparer U
2A, U
2B, voltage stabilizing diode Z
1, Z
2, capacitor C
2, C
3, C
4, resistance R
10, R
11, R
12, R
13Form a typical oscillatory circuit, be used to produce oscillator signal, wherein comparer U
2A, U
2BAll adopt LM324, voltage stabilizing diode Z
1, Z
2Adopt the voltage stabilizing diode of 5.1V voltage, be used to guarantee that oscillator signal is stabilized in one than higher magnitude of voltage; Driving circuit is by comparer U
2C, triode Q
1, Q
3Form a typical push-pull driver circuit, wherein comparer U
2CAlso adopt LM324, triode Q
1, Q
3Adopt BF422 and BF423 respectively; Load detecting circuit is by comparer U
2D, U
3A, U
3B, diode D
1, capacitor C
5, C
6, C
7, resistance R
5, R
7, R
14, R
15, R
16, R
20, R
27Form a signal deteching circuit, wherein comparer U with comparison, rectification, filter function
2D, U
3A, U
3BAll adopt LM324, diode D
1Adopt IM4148; The broken string judging circuit is by comparer U
3C, transition suppresses diode U
5, capacitor C
8, adjustable resistance R
11, resistance R
17, R
22, R
23Form a typical judging circuit, wherein comparer U
3CAdopt LM324, transition suppresses diode U
5Adopt TL431.
Above-mentioned alarm output circuit comprises comparer U
3D, triode Q
2, relay J DQ
2With light emitting diode D
7, diode D
12, resistance R
8, comparer U wherein
3DAdopt LM324, its negative input meets the output terminal of differentiating comparator circuit, its electrode input end ground connection, its output terminal series resistor R
8Back and triode Q
2Base stage connect triode Q
2Adopt BF422, its collector passes through by relay J DQ
2With diode D
12Behind the potential circuit that composes in parallel with power supply V
CCConnect its emitter serial connection light emitting diode D
7After meet power supply V
SSFor making the present invention have lightning protection function, avoid thunder and lightning and various electromagnetic interference, the cable core of the monitored cable of transformer secondary of the present invention is provided with lightning protection device, and this lightning protection device comprises and is arranged between two cable cores and the voltage dependent resistor (VDR) between two cable cores and the ground or gas-discharge tube or both combinations.Wherein lightning protection device comprises the voltage dependent resistor (VDR) VR that is arranged between two cable cores in the present embodiment
1And be arranged on gas-discharge tube G between two cable cores and the ground
2, G
3For reducing the influence of distributed capacitance, be provided with the rectification circuit that AC signal is become direct current signal between transformer of the present invention former limit output terminal and the load detecting circuit, the bridge rectifier circuit of this rectification circuit for connecting to form according to the order of sequence by four diodes.Reliable and stable for the original edge voltage that makes transformer of the present invention, the former limit of above-mentioned transformer also is provided with pressure limiting circuit, and this pressure limiting circuit comprises bistable diode U
1, resistance R
3, bistable diode U wherein
1Adopt P6EK12A, this bistable diode U
1Be connected in parallel between the two ends, former limit of transformer resistance R
5Be connected between the former limit output terminal and ground of transformer.
The method of cable break monitoring of the present invention may further comprise the steps:
1), with an end short circuit of at least one pair of cable core in the monitored cable, and its other end is connected with the secondary of transformer, make monitored cable core become the load of transformer secondary;
2), the input end with the former limit of transformer is connected with signal source, the former limit output terminal of transformer is connected with the load detecting the judging circuit whether load that detects transformer secondary load variations and differentiation transformer secondary opens circuit, differentiates the load of determining the transformer secondary by the load variations that detects the transformer secondary and whether open circuit.
Basic functional principle of the present invention and process are as follows:
The oscillator signal that oscillator produces is after driving circuit amplifies, enter the former limit input end of transformer, under the normal condition, the load end of (behind the monitored line short) transformer is in connection status when disconnected when communication cable is not scraped, this moment, the former limit of transformer was in normal condition, the former limit output terminal that is transformer is a low level, i.e. the comparer U of load detecting circuit
2DElectrode input end be low level, its output terminal output low level then, the comparer U of broken string identification circuit
3CElectrode input end be low level also, thereby make the alarm output circuit comparer U
3DNegative input be low level, make triode Q
2Be in cut-off state, then make light emitting diode D
7Can not conducting, the state that the expression whole piece cable that promptly do not work is communicated with, otherwise, if the load end of communication cable disconnected by scraping (being that monitored circuit formation is opened circuit) transformer is in off-state, this moment, the former limit of transformer was in abnomal condition, and the former limit output terminal of transformer is a high level, thereby makes load detecting circuit, broken string identification circuit all be in conducting state, thereby makes the comparer U of alarm output circuit
3DNegative input be high level, make triode Q
2Be in conducting state, then make light emitting diode D
7Conducting, promptly shinny, the expression cable is in off-state, and carries out corresponding operation by the follow-up system of relay control.
Claims (10)
1, a kind of monitor of electric cable breaking is characterized in that comprising:
Signal source is used to produce the input end that oscillator signal is supplied with the former limit of transformer;
Transformer, the former limit of described transformer is connected with the output terminal of signal source and the input end of load detecting circuit respectively, and its secondary connects at least one pair of cable core in the monitored cable respectively, and the load end short circuit of this cable core;
Load detecting circuit is connected between the input end of the former limit output terminal of transformer and the judging circuit that breaks, and is used to detect the load variations of transformer secondary;
The broken string judging circuit is connected load detecting circuit and alarms between the output circuit, and whether the load end that is used for differentiating according to the load variations of the detected transformer secondary of load detecting circuit the transformer secondary is in off-state;
The alarm output circuit is connected the output terminal of broken string judging circuit, is used to export the alarm signal that the load end of indication transformer secondary has disconnected.
2, monitor of electric cable breaking according to claim 1, the cable core that it is characterized in that the monitored cable of above-mentioned transformer secondary is provided with lightning protection device, this lightning protection device comprise be arranged between two cable cores and two cable cores and ground between voltage dependent resistor (VDR) or gas-discharge tube or both combinations.
3, monitor of electric cable breaking according to claim 2 is characterized in that above-mentioned lightning protection device comprises the voltage dependent resistor (VDR) VR that is arranged between two cable cores
1And be arranged on gas-discharge tube G between two cable cores and the ground
2, G
3
4, monitor of electric cable breaking according to claim 1 is characterized in that above-mentioned signal source is by comparer U
2A, U
2B, voltage stabilizing diode Z
1, Z
2, capacitor C
2, C
3, C
4, resistance R
10, R
11, R
12, R
13Form a typical oscillatory circuit, be used to produce oscillator signal, wherein comparer U
2A, U
2BAll adopt LM324, voltage stabilizing diode Z
1, Z
2Adopt the voltage stabilizing diode of 5.1V voltage, be used to guarantee that oscillator signal is stabilized in one than higher magnitude of voltage.
5, according to claim 1 or 4 described monitor of electric cable breaking, it is characterized in that being provided with driving circuit between above-mentioned transformer and the signal source, this driving circuit is connected between the former limit input end of the output terminal of signal source and transformer, flows to the input end on the former limit of transformer after being used for the oscillator signal that signal source produces amplified again.
6, monitor of electric cable breaking according to claim 1, it is characterized in that being provided with the rectification circuit that AC signal is become direct current signal between above-mentioned transformer former limit output terminal and the load detecting circuit bridge rectifier circuit of this rectification circuit for connecting to form according to the order of sequence by four diodes.
7, monitor of electric cable breaking according to claim 1, it is characterized in that being provided with current rectifying and wave filtering circuit between above-mentioned load detecting circuit and the broken string judging circuit, this current rectifying and wave filtering circuit carries out the signal of the detected load variations of load detecting circuit to deliver to the broken string judging circuit again behind the rectifying and wave-filtering.
8, monitor of electric cable breaking according to claim 1 is characterized in that above-mentioned alarm output circuit comprises comparer U
3D, triode Q
2, relay J DQ
2With light emitting diode D
7, diode D
12, resistance R
8, comparer U wherein
3DAdopt LM324, its negative input meets the output terminal of differentiating comparator circuit, its electrode input end ground connection, its output terminal series resistor R
8Back and triode Q
2Base stage connect triode Q
2Adopt BF422, its collector passes through by relay J DQ
2With diode D
12Behind the potential circuit that composes in parallel with power supply V
CCConnect its emitter serial connection light emitting diode D
7After meet power supply V
SS
9, monitor of electric cable breaking according to claim 1 is characterized in that the former limit of above-mentioned transformer is provided with pressure limiting circuit, and this pressure limiting circuit comprises bistable diode U
1, resistance R
3, bistable diode U wherein
1Adopt P6EK12A, this bistable diode U
1Be connected in parallel between the former limit input end and output terminal of transformer resistance R
5Be connected between the former limit output terminal and ground of transformer.
10, a kind of method of cable break monitoring is characterized in that may further comprise the steps:
1), with an end short circuit of at least one pair of cable core in the monitored cable, and its other end is connected with the secondary of transformer, make monitored cable core become the load of transformer secondary;
2), the input end with the former limit of transformer is connected with signal source, the former limit output terminal of transformer is connected with the load detecting the judging circuit whether load that detects transformer secondary load variations and differentiation transformer secondary opens circuit, differentiates the load of determining the transformer secondary by the load variations that detects the transformer secondary and whether open circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114757 CN1238726C (en) | 2002-01-18 | 2002-01-18 | Monitor of electric cable breaking and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114757 CN1238726C (en) | 2002-01-18 | 2002-01-18 | Monitor of electric cable breaking and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1376929A true CN1376929A (en) | 2002-10-30 |
| CN1238726C CN1238726C (en) | 2006-01-25 |
Family
ID=4743275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02114757 Expired - Fee Related CN1238726C (en) | 2002-01-18 | 2002-01-18 | Monitor of electric cable breaking and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1238726C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100510762C (en) * | 2004-07-07 | 2009-07-08 | 三菱电机株式会社 | Resolver malfunction diagnostic circuit |
| CN103344874A (en) * | 2013-06-28 | 2013-10-09 | 清华大学 | Detection circuit of active shielding wiring |
| CN103454557A (en) * | 2013-08-29 | 2013-12-18 | 华为技术有限公司 | Method and device for detecting cable fault |
| CN103792458A (en) * | 2012-10-30 | 2014-05-14 | Ls产电株式会社 | Disconnection detecting apparatus and method |
| CN103930935A (en) * | 2011-08-18 | 2014-07-16 | Ss7咨询与顾问公司 | System for monitoring installed infrastructure |
| CN103983883A (en) * | 2014-04-01 | 2014-08-13 | 杭州电子科技大学 | Low-voltage direct-current load open circuit monitoring circuit |
| CN104330695A (en) * | 2014-09-26 | 2015-02-04 | 国家电网公司 | Multifunctional secondary cable tester |
| CN104464150A (en) * | 2014-12-06 | 2015-03-25 | 冷静 | Cable theft alarm system |
| CN104569734A (en) * | 2013-10-12 | 2015-04-29 | 北京航天计量测试技术研究所 | Fault diagnosis method for redundant lines of cable system |
| CN104854463A (en) * | 2012-12-18 | 2015-08-19 | 皇家飞利浦有限公司 | Problem detection in cable system |
| CN105372555A (en) * | 2015-11-05 | 2016-03-02 | 国网山西省电力公司大同供电公司 | Electric power monitoring system having fault position detection function |
| CN105606943A (en) * | 2015-10-27 | 2016-05-25 | 上海斐讯数据通信技术有限公司 | Alarm device of cable broken line fault and method thereof |
| CN108630492A (en) * | 2018-06-11 | 2018-10-09 | 宁波星成电子股份有限公司 | Novel high-pressure relay |
| CN109031180A (en) * | 2018-07-26 | 2018-12-18 | 西门子电力自动化有限公司 | Detect the method and apparatus of the residual voltage state of capacitance type potential transformer |
| CN117855972A (en) * | 2023-12-29 | 2024-04-09 | 东莞市铭瑞电子有限公司 | Communication cable connection module |
-
2002
- 2002-01-18 CN CN 02114757 patent/CN1238726C/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100510762C (en) * | 2004-07-07 | 2009-07-08 | 三菱电机株式会社 | Resolver malfunction diagnostic circuit |
| CN103930935A (en) * | 2011-08-18 | 2014-07-16 | Ss7咨询与顾问公司 | System for monitoring installed infrastructure |
| US9312915B2 (en) | 2012-10-30 | 2016-04-12 | Lsis Co., Ltd. | Disconnection detecting apparatus and method |
| CN103792458A (en) * | 2012-10-30 | 2014-05-14 | Ls产电株式会社 | Disconnection detecting apparatus and method |
| CN104854463A (en) * | 2012-12-18 | 2015-08-19 | 皇家飞利浦有限公司 | Problem detection in cable system |
| CN103344874A (en) * | 2013-06-28 | 2013-10-09 | 清华大学 | Detection circuit of active shielding wiring |
| CN103344874B (en) * | 2013-06-28 | 2015-08-19 | 清华大学 | A kind of testing circuit of active shielding wiring |
| CN103454557A (en) * | 2013-08-29 | 2013-12-18 | 华为技术有限公司 | Method and device for detecting cable fault |
| CN103454557B (en) * | 2013-08-29 | 2016-06-22 | 华为技术有限公司 | The detection method of a kind of cable fault and detecting device |
| CN104569734B (en) * | 2013-10-12 | 2017-07-18 | 北京航天计量测试技术研究所 | A kind of cable system redundant line method for diagnosing faults |
| CN104569734A (en) * | 2013-10-12 | 2015-04-29 | 北京航天计量测试技术研究所 | Fault diagnosis method for redundant lines of cable system |
| CN103983883A (en) * | 2014-04-01 | 2014-08-13 | 杭州电子科技大学 | Low-voltage direct-current load open circuit monitoring circuit |
| CN103983883B (en) * | 2014-04-01 | 2016-11-23 | 杭州电子科技大学 | Low-voltage direct load cut-off observation circuit |
| CN104330695A (en) * | 2014-09-26 | 2015-02-04 | 国家电网公司 | Multifunctional secondary cable tester |
| CN104464150A (en) * | 2014-12-06 | 2015-03-25 | 冷静 | Cable theft alarm system |
| CN105606943A (en) * | 2015-10-27 | 2016-05-25 | 上海斐讯数据通信技术有限公司 | Alarm device of cable broken line fault and method thereof |
| CN105372555A (en) * | 2015-11-05 | 2016-03-02 | 国网山西省电力公司大同供电公司 | Electric power monitoring system having fault position detection function |
| CN105372555B (en) * | 2015-11-05 | 2018-04-06 | 国网山西省电力公司大同供电公司 | A kind of electric power monitoring system with abort situation detection function |
| CN108630492A (en) * | 2018-06-11 | 2018-10-09 | 宁波星成电子股份有限公司 | Novel high-pressure relay |
| CN108630492B (en) * | 2018-06-11 | 2024-04-26 | 宁波星成电子股份有限公司 | High-voltage relay |
| CN109031180A (en) * | 2018-07-26 | 2018-12-18 | 西门子电力自动化有限公司 | Detect the method and apparatus of the residual voltage state of capacitance type potential transformer |
| CN109031180B (en) * | 2018-07-26 | 2020-08-11 | 西门子电力自动化有限公司 | Method and device for detecting residual voltage state of capacitor voltage transformer |
| CN117855972A (en) * | 2023-12-29 | 2024-04-09 | 东莞市铭瑞电子有限公司 | Communication cable connection module |
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| Publication number | Publication date |
|---|---|
| CN1238726C (en) | 2006-01-25 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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Effective date of registration: 20201204 Address after: Room 1513-1514, 2 / F, Kechuang City, 17 Huaguoshan Avenue, hi tech Industrial Development Zone, Lianyungang City, Jiangsu Province 222000 Patentee after: Jiangsu Dafa Environmental Protection Technology Co.,Ltd. Address before: Shenzhen Science and Technology Park Patentee before: Vertiv Tech Co.,Ltd. |
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Granted publication date: 20060125 Termination date: 20210118 |
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