CN2241344Y

CN2241344Y - Communication cable theft-proof alarm device

Info

Publication number: CN2241344Y
Application number: CN 96227108
Authority: CN
Inventors: 李庆彬; 韩玉木
Original assignee: JI-NAN TELECOMMUNICATION OFFICE
Current assignee: JI-NAN TELECOMMUNICATION OFFICE
Priority date: 1996-01-29
Filing date: 1996-01-29
Publication date: 1996-11-27
Anticipated expiration: 2006-01-29

Abstract

The utility model provides a technical scheme, which relates to a special anti-theft alarm for communication cables. The utility model is characterized in that only one circuit board is arranged in a casing; a power circuit, a detection circuit and an alarm circuit are arranged on the circuit board, wherein the circuits are composed of electronic elements. The power circuit takes direct current power supply of 48 V from an exchanger, and outputs the power supply of 9 V to the detection circuit and the alarm circuit after voltage regulation and stabilization by a voltage stabilizer. The detection circuit monitors a detection line by an inverter integrated circuit and a trigger integrated circuit, and transfers monitor signals to a light alarm light-emitting diode and a sound alarm circuit. The sound alarm circuit which uses only one triode has a very simple structure.

Description

The telecommunication cable burglar alarm

The utility model relates to burglar alarm, especially the telecommunication cable burglar alarm used of long-distance call communication line.

In the prior art, it is No. 96227016.4 patents at the application number of Patent Office of the People's Republic of China's application formerly that the burglar alarm that is specifically designed to telecommunication cable has only the applicant, the technical scheme of this patented claim can realize sending when telecommunication cable is stolen light and acoustic alarm effectively, but this scheme needs multiple power supply, so sound alarm circuit needs independent time-base oscillation circuit its circuit structure complexity again, the integrated circuit that adopts all is that TTL type power consumption is also bigger, detects the low event of voltage simultaneously and has problems such as poor anti jamming capability.

The purpose of this utility model provides the technical scheme of the telecommunication cable burglar alarm that a kind of circuit is simple, energy consumption is low, antijamming capability is strong exactly at the existing in prior technology weak point.

For clearly demonstrating the technical characterstic of this programme, this programme is elaborated now by the burglar alarm specific embodiment that can monitor ten eight road cables, and in conjunction with its accompanying drawing.

Description of drawings:

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the power circuit synoptic diagram of the utility model embodiment;

Fig. 3 is the unit testing circuit of the utility model embodiment and the synoptic diagram of sound alarm circuit;

The telecommunication cable burglar alarm has a housing 2 that a circuit board 6 is housed within it, and power switch 1,8,18 light warnings of power supply indication light emitting diode indication light emitting diode 5, reset button 7, hummer 3 compositions are housed on the panel 4 of housing 2.The characteristics of this programme are to be to be equipped with on the described circuit board 6 power circuit be made up of electron device and detection, warning circuit; Described power circuit is to be defeated by 3 pin of integrated circuit (IC) 1 simultaneously through diode connected in parallel D1 and capacitor C 1 ground connection by getting the 48V power supply on the telephone exchange, also connect 2 pin of IC1 through reverse diode D2,1 pin of IC1 is through resistance R 1 ground connection, connect 2 pin of IC1 again through diode D3,2 pin of IC1 connect resistance R 2 capacitor C 2 ground connection of the 1 pin while of integrated circuit (IC) 2 through series connection, contact in resistance R 2 and capacitor C 2 links to each other with 1 pin of IC1 again, 1 pin of integrated circuit (IC) 2 is through the capacitor C 3 of parallel connection, C4 and voltage stabilizing diode D4 ground connection connect 3 pin of IC2 simultaneously through reverse diode D5,2 pin ground connection, the 3 pin output 9V power supply of IC2, while is through the capacitor C 5 of parallel connection, C6 and voltage stabilizing diode D6 ground connection, indicate light emitting diode 8 ground connection through the resistance R 3 and the power supply of series connection again, used integrated circuit (IC) 1 is a LM317T type three-port variable voltage regulator in this circuit, and integrated circuit (IC) 2 is fixedly three terminal regulators of 7809 types.Described detection, warning circuit is by forming with report to the police indication light emitting diode 5 numbers identical 18 unit testing circuits and a sound alarm circuit, and the unit testing circuit is detection line two terminals X, the Y end connects the 48V power supply through backward dioded D7 among the Y, the X end connects 1 pin of integrated circuit (IC) 3 through resistance R 4, the 1 pin while is through the capacitor C 7 and resistance R 5 ground connection of parallel connection, 7 pin ground connection, 14 pin of IC3 connect the 9V power supply, 2 pin of IC3 connect 3 pin of integrated circuit (IC) 4, indicate light emitting diode 5 and voltage stabilizing diode D8 ground connection through the warning of series connection simultaneously, again through the series connection capacitor C 8 and resistance R 6 ground connection, connect 9 pin of IC4 through diode D9 at the contact of capacitor C 8 and resistance R 6,9 pin are simultaneously through parallel resistor R7 and capacitor C 9 ground connection, 8 pin ground connection, 16 pin of IC4 connect the 9V power supply, 1 pin of IC4 connects the 9V power supply simultaneously through capacitor C 10 ground connection through resistance R 8, the two ends of capacitor C 10 also connect two contacts of

reset button

7,2 pin of IC4 connect the triode T1 base stage of sound alarm circuit through diode D10 and resistance R 9, this warning circuit is that the base stage of triode T1 is through parallel resistor R10 and capacitor C 11 ground connection, the emitter of T1 is ground connection also, and collector connects the 9V power supply through hummer 3, used integrated circuit (IC) 3 is CD4069 type phase inverters in this circuit, and integrated circuit (IC) 4 is CD40174 D-flip flops, and the model of used triode T1 is TIP41C.

The input of this programme power circuit is taken from the direct current 48V power supply of telephone exchange and is exported one+9V direct current for detection, warning circuit usefulness after the adjustment voltage stabilizing of IC1 and IC2.Detect, warning circuit also is to adopt detection line to monitor that under normal circumstances, 1 pin of IC3 is that noble potential 2 pin are electronegative potential, the light not luminous warning of the luminous two machine pipes of indication of reporting to the police, the IC4 also silent alarm of not overturning.When detection line cuts off with telecommunication cable is stolen, it is noble potential that 1 pin of IC3 becomes electronegative potential 2 pin, light warning lumination of light emitting diode is reported to the police, this high potential signal is coupled to positive pulse of 9 pin of IC4 simultaneously, makes the IC4 2 pin output noble potential that overturns, and this noble potential makes triode T1 conducting, hummer sounding alarm then, if need stop acoustic alarm, press reset button and IC4 is resetted get final product still continuation but light is reported to the police.As seen have only a kind of power supply in this programme, sound alarm circuit also has only a triode, and entire circuit is simple in structure, and in addition, integrated circuit all adopts cmos circuit again, and circuit power consumption is low and detect the voltage height, so its antijamming capability is strong.This shows, the utility model compared with prior art, its effect is conspicuous.

Embodiment illustrates in technical scheme, no longer repeats at this.

Claims

The telecommunication cable burglar alarm mainly by housing (2) and interior circuit board (6) thereof and panel (4) and on power switch (1), power supply indication light emitting diode (8), at least six the indication light emitting diodes (5) of reporting to the police, reset button (7), hummers (3) form, of the present utility model being characterised in that is equipped with the power circuit be made up of electron device and detection, warning circuit on the described circuit board (6); Described power circuit is to be defeated by 3 pin of integrated circuit (IC) 1 simultaneously through diode connected in parallel D1 and capacitor C 1 ground connection by getting the 48V power supply on the telephone exchange, also connect 2 pin of IC1 through reverse diode D2,1 pin of IC1 is through resistance R 1 ground connection, connect 2 pin of IC1 again through diode D3,2 pin of IC1 connect resistance R 2 capacitor C 2 ground connection of the 1 pin while of integrated circuit (IC) 2 through series connection, contact in resistance R 2 and capacitor C 2 links to each other with 1 pin of IC1 again, 1 pin of integrated circuit (IC) 2 is through the capacitor C 3 of parallel connection, C4 and voltage stabilizing diode D4 ground connection connect 3 pin of IC2 simultaneously through reverse diode D5,2 pin ground connection, the 3 pin output 9V power supply of IC2, while is through the capacitor C 5 of parallel connection, C6 and voltage stabilizing diode D6 ground connection are indicated light emitting diode (8) ground connection through the resistance R 3 and the power supply of series connection again; Described detection, warning circuit is by forming with report to the police indication light emitting diode (5) number identical unit testing circuit and a sound alarm circuit, and the unit testing circuit is detection line two terminals X, the Y end connects the 48V power supply through backward dioded D7 among the Y, the X end connects 1 pin of integrated circuit (IC) 3 through resistance R 4, the 1 pin while is through the capacitor C 7 and resistance R 5 ground connection of parallel connection, 7 pin ground connection, 14 pin of IC3 connect the 9V power supply, 2 pin of IC3 connect 3 pin of integrated circuit (IC) 4, indicate light emitting diode (5) and voltage stabilizing diode D8 ground connection through the warning of series connection simultaneously, again through the series connection capacitor C 8 and resistance R 6 ground connection, connect 9 pin of IC4 through diode D9 at the contact of capacitor C 8 and resistance R 6,9 pin are simultaneously through parallel resistor R7 and capacitor C 9 ground connection, 8 pin ground connection, 16 pin of IC4 connect the 9V power supply, 1 pin of IC4 connects the 9V power supply simultaneously through capacitor C 10 ground connection through resistance R 8, the two ends of capacitor C 10 also connect two contacts of reset button (7), 2 pin of IC4 connect the triode T1 base stage of sound alarm circuit through diode D10 and resistance R 9, this warning circuit is that the base stage of triode T1 is through parallel resistor R10 and capacitor C 11 ground connection, the emitter of T1 is ground connection also, and collector connects the 9V power supply through hummer (3).
2. telecommunication cable burglar alarm according to claim 1 it is characterized in that described integrated circuit (IC) 1 is a LM317T type three-port variable voltage regulator, and integrated circuit (IC) 2 is fixedly three terminal regulators of 7809 types.
3. telecommunication cable burglar alarm according to claim 1 it is characterized in that described integrated circuit (IC) 3 is CD4069 type phase inverters, and integrated circuit (IC) 4 is CD40174 D-flip flops, and the model of used triode T1 is TIP41C.