CN201302747Y

CN201302747Y - Anti-theft device for armored cable

Info

Publication number: CN201302747Y
Application number: CNU2008202124827U
Authority: CN
Inventors: 沈海彬; 谢保东; 谢立明
Original assignee: Shenzhen Kangbei Electronics Co Ltd
Current assignee: Shenzhen Kangbei Electronics Co Ltd
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2009-09-02
Anticipated expiration: 2018-10-17

Abstract

The utility model discloses an anti-theft device of an armored cable, which comprises a detection alarm module and an armor layer, wherein the armor layer serves as a detection object. Signals of the detection alarm module forms a return circuit through the armor layer. When someone stoles the armored cable, the armor layer can be destroyed, and the electrical parameter of the return and the completeness of the signals can be changed, then the cable is stolen can be detected after changes can be detected, and finally the alarm signals can be outputted. The utility model has the advantages of simple structure and low cost, which only needs one detector to be added because the armor of the cable is used to be the detection object.

Description

A kind of anti-theft device of sheathed cable

Technical field

The utility model relates to a kind of electric anti-thief device, relates in particular to a kind of anti-theft device of sheathed cable.

Background technology

The device of general cable theft-prevention is that cable is cut off or stolen warning device action generation sound or the visual alarm of just making, during some thief theft sheathed cables, often not that whole cable stolen, but removing conductor layer, after peeling off, steals the thing outside the flame retardant coating, these three layers of insulation courses, even have in the cable like this, also can not exert an influence, thereby not be found, but cable is then scrapped fully power supply.Armor be in order to make cable that certain intensity be arranged in cable core outside, one deck steel is being twined in the exocuticle the inside, prevents insect bite, breaks or the like.If the theft one's share of expenses for a joint undertaking will as above said theft cable then is bound to brokenly change armor.China Patent No. is 200720124407.0, name is called the utility model patent of " the antitheft detection alarm device of power circuit ", the antitheft detection alarm device of a kind of power circuit is disclosed, comprise relay J, hummer B and direct supply, it also comprises pilot lamp L, the first self-lock switch K1 and the second self-lock switch K2, the coil winding of the first self-lock switch K1 and the relay J composition loop inductance that is serially connected wherein, this loop inductance is serially connected on the AC network circuit; The second normally closed contact J of described relay J " with the described second self-lock switch K2, hummer B and the direct supply composition alarm circuit that is chained together.The weak point of the pick-up unit of general cable theft-prevention is to have only when the AC network power down, the alarm circuit conducting, it is normal the power failure or the unexpected broken string of AC network circuit appearance that the operator could investigate, and the utility model has overcome above deficiency, even during thief theft sheathed cable, whole cable do not stolen, but steal after thing these 3 layers of the conductor layers, flame retardant coating, insulation course is peeled off removing, the utility model also can detect and by the warning of the utility model warning device.

The utility model content

Technical problem to be solved in the utility model provides a kind of anti-theft device of sheathed cable, and it can as long as thief has been stolen armor, can detect and produce alerting signal when electrical network does not cut off the power supply.

For solving technical matters of the present utility model, the utility model discloses a kind of anti-theft device of sheathed cable, the anti-theft device of sheathed cable described in the utility model partly is made up of detection alarm module and armor, armor is as detected object, the signal of detection alarm module is formed a loop by armor, armor is bound to destroy when the people steals sheathed cable, at this moment electrical quantity or signal integrity change, detect this variation and judge that then cable is stolen, output alarm signal.The electrical quantity that detects includes but are not limited to the integrality of voltage, electric current, signal.

Be described further below in conjunction with accompanying drawing.

Fig. 2 is and a kind ofly utilizes the variation that detects voltage to judge the pick-up unit that sheathed cable is whether stolen.The P1 port of resistance R 1 one termination MCU, one termination power, P1 is by armor ground connection, P1 is numeral input or A/D input port, under normal circumstances armor is complete, whole path is intact, the level that the P1 point detects should be low level, P1 disconnects to the path on ground after armor is destroyed, and the level that the P1 point detects is a low level, after the level that detects P1 is low level, judge that promptly sheathed cable is stolen, MCU sends alarm command to alarm module, and alarm module rings alarming horn, and reports to the police to center on duty by wireless GSM communication module.

The utility model is simple in structure, and cost is low, utilizes the armouring of sheathed cable itself to do detected object, only needs to add 1 detecting device and gets final product.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 circuit theory diagrams of the present utility model.

Among the figure, 1, packing material, 2, conductor, 3, flame retardant coating, 4, insulation course, 5, inner sheath, 6, steel-tape armouring, 7, sheath, 8, the detection alarm module, 9, armor, 10, alarm module.

Embodiment

As shown in Figure 1, 2, the detection method of the described armored electric cable theft prevention of present embodiment is: an end ground connection of armor or shielding, detect the variation of an other end electrical quantity or the integrality of signal judges whether armor is destroyed by detecting device.Be specially armor as detected object, the signal of detection alarm module is formed a loop by armor to ground, and armor is bound to destroy when the people steals sheathed cable, at this moment the loop disconnects, input less than, judge that then cable is stolen, output alarm signal.The electrical quantity that detects includes but are not limited to the integrality of voltage, electric current, signal.

The anti-theft device of sheathed cable described in the utility model partly is made up of detection alarm module and armor.

Fig. 2 is and a kind ofly utilizes the variation that detects voltage to judge the pick-up unit that sheathed cable is whether stolen.Comprise detection alarm module 8 and armor 9, detection alarm module 8 comprises power supply, resistance R 1, MCU, alarm module 10; The P1 port of resistance R 1 one termination MCU, one termination power, P1 is by armor ground connection, P1 is numeral input or A/D input port, under normal circumstances armor is complete, whole path is intact, the level that the P1 point detects should be low level, P1 disconnects to the path on ground after armor 9 is destroyed, and the level that the P1 point detects is a low level, after the level that detects P1 is low level, judge that promptly sheathed cable is stolen, MCU sends alarm command to alarm module 10, alarm module 10 sound alarming horns, and pass through wireless GSM communication module and report to the police to center on duty.

Claims

1, a kind of anti-theft device of sheathed cable is characterized in that: comprise detection alarm module (8) and armor (9); Detection alarm module (8) comprises power supply, resistance (R1), MCU, alarm module (10); The P1 port of resistance (R1) termination MCU, a termination power, P1 is by armor ground connection, and P1 is digital input port.