CN101996463A - Armoured cable anti-theft external damage protection detection alarm method - Google Patents
Armoured cable anti-theft external damage protection detection alarm method Download PDFInfo
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- CN101996463A CN101996463A CN2009100235472A CN200910023547A CN101996463A CN 101996463 A CN101996463 A CN 101996463A CN 2009100235472 A CN2009100235472 A CN 2009100235472A CN 200910023547 A CN200910023547 A CN 200910023547A CN 101996463 A CN101996463 A CN 101996463A
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Abstract
The invention discloses an armoured cable anti-theft external damage protection detection alarm method in which the integrity of a grounded closed loop consisting of an armoured layer and a copper shielding layer of an armoured cable is detected to judge whether the armoured cable is stolen or damaged by external force. The method is characterized in that a characteristic signal injected from the armoured layer reaches an armoured layer grounded side through the grounded loop and is detected at the armoured layer grounded side to judge whether the armoured cable is stolen or damaged by external force. The method comprises the following specific steps: a detection unit is connected with the armoured layer and a grounding point in series or arranged in the armoured layer; the characteristic signal injected to a far ground end of the armoured layer reaches a near ground end of the armoured layer through the loop consisting of the armoured layer and the copper shielding layer and is detected at the near ground end of the armoured layer; and whether theft or external damage happens is judged according to the following method: if the cut-off detection characteristic signal of the armoured layer or the copper shielding layer disappears, judging that cable theft or external damage is happening.
Description
Technical field
The present invention relates to electric power detection technique field, relate in particular to a kind of armored electric cable theft prevention anti-outside destroy detection, alarm method and device, mainly be applicable to the antitheft, tamper-proof of 10-35KV sheathed cable and warning.
Background technology
In recent years, sheathed cable brings about great losses for commercial production and daily life because the malicious event that artificial pilferage activity and barbarous construction cause frequently takes place.Cable theft-prevention product in the market, mainly divide five big classes: 1. whether manhole cover anti-theft, its ultimate principle are to have the people to enter conduit line by the well lid place by the monitoring of human body infrared probe is installed at conduit line well lid place, carry out cable anti-theft alarm.Shortcoming: can not report to the police when cable duct is stolen when the people who steals cable enters by digging out a tunnel; And the method is robber's conventional process.2. infrared acquisition or laser correlation, its ultimate principle are by installing infrared at conduit line or whether the monitoring of laser correlation has the people to enter conduit line by the well lid place, carrying out cable anti-theft alarm.Shortcoming: wrong report when other objects such as mouse shut out the light.More than the common drawback of two class detection methods: powerup issue is difficult to solve, and adopts powered battery later maintenance workload big; Many units are difficult to coordinate; The cost height; Install additional video camera since raceway groove too picture black be difficult to see clearly.3. current-voltage transformer, its ultimate principle are by installing current-voltage transformer additional at cable core, change by detecting current/voltage, carrying out cable anti-theft alarm.Shortcoming: (1) when the robber shells do not report to the police (2) cable when screen layer does not cut off heart yearn can't burglar alarm under stand-by state; 4. power carrier, its ultimate principle are by in the cable core load signal, adopt Principle of Communication, carry out cable anti-theft alarm.Shortcoming: (1) when the robber shells do not report to the police when screen layer does not cut off heart yearn often report by mistake when (2) load current changes greatly (3) influence original cable insulation state.5. cable pipe, shortcoming: great in constructing amount, long in time limit, the cost height, later stage cable maintenance difficulty is big.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the detection method of the anti-outside destroy of a kind of armored electric cable theft prevention is provided, this method can in time be reported to the police when armouring (steel band) layer of sheathed cable or copper shield are destroyed.
Technical scheme of the present invention is: a kind of armored electric cable theft prevention is prevented the outside destroy detection method, lay standard according to power cable, the necessary ground connection of the armor of sheathed cable and metal screen layer, armor and external shielding layer just constitute the ground loop of a closure like this, wherein mainly to act on be to strengthen the cable compression and tensile strength to armor, screen layer its mainly to act on be that electromagnetic screen and uniform electric field distribute, the anti-outside destroy detection method of this armored electric cable theft prevention is to realize that by the integrality that detects this closed ground loop the anti-outside destroy of cable theft-prevention reports to the police.It is characterized in that: by armouring far side inject characteristic signal, detect this signal in ground connection near-earth side, judge the destruction whether cable suffers the external force effect according to the variation of detection signal, the concrete steps of method are as follows:
1, cable theft-prevention detecting unit (10) is serially connected with in armor and earth point or the armor.
2, whether outside destroy or thievery taking place, judges according to following method:
Inject characteristic signal by cable theft-prevention detecting unit (10) output A (13) side direction armouring, detect this characteristic signal in cable theft-prevention detecting unit (10) output B (12) side, when cable sheath (2) armor (16) or copper shield (17) are cut off, output B (12) side characteristic signal disappears, and judges that then the outside destroy incident takes place.
Realize the anti-outside destroy warning device of cable theft-prevention of said method; be made up of cable theft-prevention detecting unit (10) and high voltage isolated power supply (11), wherein cable theft-prevention detecting unit (10) is made up of signals collecting and disposal system (5), signal generator (7), signal detector (6), wave filter (8), protected location (9), communication module (4).
Its course of work is that signals collecting and disposal system (5) control-signals generator (7) are sent characteristic signal, this characteristic signal injects cable sheath by cable theft-prevention detecting unit output A end (13) and copper litz wire (15) and far holds (16), signal flow arrives cable theft-prevention detecting unit (10) output B end (12) behind copper shield (17) and cable sheath (2) and copper litz wire (14), signal detector (6) detects signal, the detected signal of signal detector (6) is handled through signals collecting and disposal system (5), as judging that cable is stolen or suffer that outside destroy sends to warning message on Surveillance center and the related personnel's mobile phone by communication module (4) immediately.
Among the present invention, the major function of protected location (9) is to provide passage for surge voltage and surge current, and then reaches the purpose of protection cable theft-prevention detecting unit (10).
Among the present invention, the major function of wave filter (8) is to provide the low impedance path for the 50Hz alternating current.
Among the present invention, high voltage isolated power supply (11) mainly is the low pressure insulating power supply to be provided and to prevent that high pressure from pouring into low-voltage network for cable theft-prevention detecting unit (10).
Description of drawings
Fig. 1 implements the cable construction artwork of the inventive method.
Fig. 2 implements the apparatus structure synoptic diagram of the inventive method.
Embodiment
The explanation of mark among Fig. 1: the 1-oversheath, 2-armor near end, the 3-inner sheath, the 16-armor is far held.
The explanation of mark among Fig. 2: 2-armor near end, 4-communication module, 5-signals collecting and disposal system; the 6-signal detector, 7-control-signals generator, 8-wave filter; the 9-protected location, 10-cable theft-prevention detecting unit, 11-high voltage isolated power supply; 12-detecting unit output B end; 13-detecting unit output A end, 14-copper litz wire, 15-copper litz wire; the 16-armor is far held, the 17-copper shield.
The present invention is described in further detail below in conjunction with drawings and Examples.
According to shown in Figure 1 cable is carried out the following steps construction:
Mode one:
1. after determining the cable no-voltage,, select bigger location, conduit line gap to operate according to on-site actual situations.
2. divest cable armouring; Measure 250mm and divest oversheath (1), respectively will be apart from armor (2) armor (16) colligation of both sides oversheath gap 50mm, remove the interlude armor, with the section of staying armor hacking.
3. weld ground wire; With two 25mm
2Copper litz wire (14) copper litz wire (15) one ends use firing iron and armor (2) armor (16) to weld respectively, and solder joint is good.
4. copper litz wire (14) copper litz wire (15) insulation; With the J-20 para tape copper litz wire is wrapped up the 3-4 layer.
5. waterproof measure; Adopt water blocking tape that oversheath (1) gap is added 100mm and wrap up layer 2-3 with water blocking tape.
6. copper litz wire (15) other end presses the 200A Electric nose to connect detecting unit output A end (13), and copper litz wire (14) other end presses the 200A connection terminal to connect detecting unit output B end (12).
Mode two:
Detecting unit output A end (13) passes through 25mm
2Copper litz wire (15) connects cable sheath, and detecting unit output B end (12) passes through 25mm
2Copper litz wire (14) connects earth point.
The present invention is described in further detail in conjunction with embodiment illustrated in fig. 2:
The PUB-220/12 type high voltage isolated power supply that high voltage isolated power supply (11) selects for use POP, Xi'an special power supply company limited to produce; The LM567 that signal detector (6) selects for use U.S. BB company to produce; The NE555 that signal generator (7) selects for use TI company to produce, frequency is penetrated and is decided to be 60KHz; Wave filter (8) is selected the 20mH/100A inductance for use; The army grade TD-2006C type communication module that communication module (4) selects for use western ADT communication company limited to produce.
Utilize device shown in Figure 2, signals collecting and disposal system (5) control-signals generator (7) is sent characteristic signal, this characteristic signal injects cable sheath (2) by detecting unit output A end (13) and copper litz wire (15), signal flow arrives cable theft-prevention detecting unit (10) output B end (12) behind external shielding layer (17) and cable sheath (2) and copper litz wire (14), signal detector (6) detects signal, the detected signal of signal detector (6) is handled through signals collecting and disposal system (5), as judging that cable is stolen or suffer that outside destroy sends to warning message on Surveillance center and the related personnel's mobile phone by communication module (4) immediately.
Whether outside destroy or thievery take place can be judged according to following method:
Inject characteristic signal by cable theft-prevention detecting unit (10) output A (13) side direction armouring, detect this characteristic signal in cable theft-prevention detecting unit (10) output B (12) side, when cable sheath (2) armor (16) or copper shield (17) are cut off, output B side characteristic signal disappears, and judges that then the outside destroy incident takes place.Through a large amount of hanging net operations, the result shows that this method construction is simple, and cost is low, and is stable, can be reliable, there is not the wrong report phenomenon, and can well realize the purpose that the antitheft anti-outside destroy of cable is reported to the police.
Claims (1)
1. an armored electric cable theft prevention is prevented outside destroy detection alarm method, be to utilize the armor of sheathed cable and the closed-loop path that copper shield constitutes, judge that sheathed cable is whether stolen or suffer outside destroy by the integrality that detects this ground loop, it is characterized in that: inject characteristic signal by armor, characteristic signal arrives armor ground connection side by ground loop, judge whether stolen or outside destroy of sheathed cable at armor near-earth side detected characteristics signal, if detected characteristics blackout, judge that cable sheath or copper shield are destroyed, and then the judgement cable is stolen or the outside destroy incident takes place.The concrete steps of method are as follows:
1) detecting unit is serially connected with in armor and earth point or the armor;
2) far hold the injection characteristic signal to armor, characteristic signal arrives armor near end, armor near end detected characteristics symbol by the loop that armor and screen layer constitute;
3) whether theft or outside destroy taking place judges according to following method:
Armor or screen layer are cut off the detected characteristics blackout, judge that then cable theft or outside destroy incident take place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100235472A CN101996463A (en) | 2009-08-10 | 2009-08-10 | Armoured cable anti-theft external damage protection detection alarm method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100235472A CN101996463A (en) | 2009-08-10 | 2009-08-10 | Armoured cable anti-theft external damage protection detection alarm method |
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| Publication Number | Publication Date |
|---|---|
| CN101996463A true CN101996463A (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100235472A Pending CN101996463A (en) | 2009-08-10 | 2009-08-10 | Armoured cable anti-theft external damage protection detection alarm method |
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| CN (1) | CN101996463A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150861A (en) * | 2013-02-01 | 2013-06-12 | 西安秦骊成套电器有限公司 | Non-injection clamping-type cable anti-theft and alarming mechanism |
| CN107993391A (en) * | 2017-12-31 | 2018-05-04 | 国网山东省电力公司龙口市供电公司 | Cable anti-theft system |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
-
2009
- 2009-08-10 CN CN2009100235472A patent/CN101996463A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103150861A (en) * | 2013-02-01 | 2013-06-12 | 西安秦骊成套电器有限公司 | Non-injection clamping-type cable anti-theft and alarming mechanism |
| CN107993391A (en) * | 2017-12-31 | 2018-05-04 | 国网山东省电力公司龙口市供电公司 | Cable anti-theft system |
| CN115144791A (en) * | 2022-09-06 | 2022-10-04 | 浙江新图维电子科技有限公司 | Method and system for online detection of high-voltage cable armor grounding state |
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Application publication date: 20110330 |