CN101865965B - Automatic detection alarm of breakpoints of communication cable - Google Patents
Automatic detection alarm of breakpoints of communication cable Download PDFInfo
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- CN101865965B CN101865965B CN201010179810XA CN201010179810A CN101865965B CN 101865965 B CN101865965 B CN 101865965B CN 201010179810X A CN201010179810X A CN 201010179810XA CN 201010179810 A CN201010179810 A CN 201010179810A CN 101865965 B CN101865965 B CN 101865965B
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Abstract
The invention relates to an automatic detection alarm of breakpoints of a communication cable, which comprises a control circuit, a dialing circuit and a telephone interface circuit, wherein the telephone interface circuit comprises an amplifying circuit and a trigger circuit; the amplifying circuit comprises a computing amplifier IC2, a computing amplifier IC3, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7; the inverted input end of the computing amplifier IC2 is connected with one end of the resistor R3, one end of the resistor R4 and one end of the resistor R5; the other end of the resistor R3 is connected with an AUD audio signal through the capacitor C4; and the other end of the resistor R4 is connected with the dialing circuit through the capacitor C5. A monostable circuit is utilized to be matched with the control circuit to carry out real-time detection on the breakpoints of the cable to judge the distance of the breakpoints; when the cable is cut and stolen or generates faults, the distances of the breakpoints of the cable can be rapidly measured, and simultaneously, a telephone number saved in advance is dialled to give a voice alarm.
Description
Technical field
The present invention relates to a kind of detection alarm appearance, specifically, relate to a kind of detection alarm appearance that can detect automatically communication cable breakpoint, belong to electronic technology field.
Background technology
Along with the high speed development of modern communications, the various types of communication circuit is more and more, and the complicacy of arranging net; And along with development of city; The excavation of urban road also increases day by day, makes communication line not only receive elemental influence and causes communication cable the situation of breakpoint to occur, also receives the influence of some human factors; Cause communication cable the situation of breakpoint to occur as road excavation and cable are stolen etc., influence the operation of whole communication network.How in time to grasp the break-make situation of various communication cables reliably, at present, also rest on and have only when breakpoint fault appears in communication cable; Just go the on-the-spot break-make that detects communication line by specific purpose tool; This detection means efficiency ratio is lower, and the waste lot of manpower and material resources has brought very big difficulty for the on-call maintenance of communication cable; Can not adapt to the development of telecommunications, influence the service quality of the whole communications industry.
Summary of the invention
The problem that the present invention will solve is to above deficiency, and a kind of automatic detection alarm of breakpoints of communication cable of detection streamer breakpoint automatically is provided.
For overcoming the above problems; The technical scheme that the present invention adopted is: automatic detection alarm of breakpoints of communication cable is characterized in that: said alarm comprises control circuit, monostable circuit, dial-up circuit, telephone interface circuit and the bell flowing detecting circuit of electrical connection;
Said bell flowing detecting circuit comprises IC 5, resistance R 8, resistance R 9, resistance R 10, capacitor C 10, capacitor C 11, capacitor C 12 and photoelectrical coupler OC; A ringing-current input end of IC 5 is through the resistance R 8 of series connection and the capacitor C 10 line TP1 that answers the call; Another ringing-current input end line TP2 that answers the call; The end of rectifying and wave-filtering termination capacitor C11, the end of oscillation frequency setting-CSET termination capacitor C12, the end of oscillation frequency setting-RSET terminating resistor R9; The other end, the other end of capacitor C 12 and the other end of resistance R 9 of ground termination capacitor C11; The output terminal of IC 5 connects the input end of photoelectrical coupler OC, another input end grounding of electric coupler OC, the output terminal connection control circuit of photoelectrical coupler OC through resistance R 10.
Further improvement as technique scheme:
Dial-up circuit comprises IC 4, capacitor C 8, capacitor C 9 and crystal oscillator G; Crystal oscillator G is connected between two crystal oscillator incoming ends of IC 4; The end of crystal oscillator G is through capacitor C 8 ground connection; The other end of crystal oscillator G is through capacitor C 9 ground connection, the chip selection signal input end of IC 4, serial signal synchronous input end and serial signal input end connection control circuit 1, the power supply positive input termination power supply of IC 4; The answer the call capacitor C 5 of interface circuit of the signal output part of IC 4, the power-input end grounding of IC 4.
The present invention adopts technique scheme; Have the following advantages: utilize monostable circuit and control circuit to cooperate breakpoint to detect in real time, judge the breakpoint distance, only need just can monitor to subsequent use external cable through simple setting to cable; When cable is cut or break down; Can measure the distance of breakpoint of cable rapidly, the telephone number of dialing prior storage simultaneously carries out audio alert, for the automatic detection of cable provides method fast and effectively.
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Description of drawings
Accompanying drawing 1 is the circuit block diagram of detection alarm appearance in the embodiment of the invention;
Accompanying drawing 2 is the circuit theory diagrams of monostable circuit in the embodiment of the invention;
Accompanying drawing 3 is the circuit theory diagrams of telephone interface circuit in the embodiment of the invention;
Accompanying drawing 4 is the circuit theory diagrams of dial-up circuit in the embodiment of the invention;
Accompanying drawing 5 is the circuit theory diagrams of bell flowing detecting circuit in the embodiment of the invention.
Among the figure,
The 1-control circuit, 2-monostable circuit, 3-dial-up circuit, 4-telephone interface circuit, 5-bell flowing detecting circuit, 6-R232 interface circuit, 7-channel selection circuit, 8-external cable interface circuit, 9-recording and playing circuit.
Embodiment
Embodiment; As shown in Figure 1; Automatic detection alarm of breakpoints of communication cable comprises control circuit 1, monostable circuit 2, dial-up circuit 3, telephone interface circuit 4, bell flowing detecting circuit 5, R232 interface circuit 6, channel selection circuit 7, external cable interface circuit 8 and the recording and playing circuit 9 of electrical connection.
As shown in Figure 2, a pair of cable that only drawn among the figure, monostable circuit 2 comprises IC 1, capacitor C 1, capacitor C 2, resistance R 1 and resistance R 2; IC 1 is 555 integrated circuit; The earth terminal of IC 1 meets the control voltage end CVOLT of IC 1 through capacitor C 2, and the trigger end TRIG of IC 1 connects an end of capacitor C 1 and an end of resistance R 1, and the other end contact of capacitor C 1 is signaled; Another termination power of resistance R 1; The reset terminal R of IC 1 connects power supply, and the threshold value end THR of IC 1 connects the discharge end DIS of IC 1 and an end of resistance R 2, and the threshold value end THR of IC 1 connects a cable through external cable interface circuit 8; Another root cable grounding, another termination power of resistance R 2.
After the cable detection power on circuitry,, be equivalent to its threshold value end THR and discharge end DIS are passed through the equivalent capacity C3 ground connection between cable, thereby constituted monostable circuit 555 integrated circuit.This moment is if send the trigger end TRIG of a low pulse signal to 555 integrated circuit through control circuit 1; Will trigger out a high level pulse signal at the output terminal Q of 555 integrated circuit; Detect the duration T s (Ts=1.1*C3*R2 second) of this high level through control circuit 1, and should preserve by time initial value Ts.During operate as normal, control circuit 1 scan round, and the duration of detected high level, Ts compares with initial value, if identical, then continues scan round.When line failure, when promptly the duration of detected high level and Ts are inequality, by control circuit 1 computational scheme electric capacity, the capacity C 3=Ts/1.1*R2 of capacitor C 3.Then this value again with the proof test value contrast of the cable length that is kept at control circuit 1 storage, can judge the distance of disconnected cable exactly.
As shown in Figure 3; Telephone interface circuit 4 comprises amplifying circuit and trigger circuit; Amplifying circuit comprises operational amplifier IC2, operational amplifier IC3, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 4, capacitor C 5, capacitor C 6 and capacitor C 7; The in-phase input end ground connection of operational amplifier IC2, the end of the inverting input connecting resistance R3 of operational amplifier IC2, an end of resistance R 4 and an end of resistance R 5, the other end of resistance R 3 connects the AUD sound signal through capacitor C 4; The other end of resistance R 4 connects dial-up circuit 3 through capacitor C 5; The output terminal of another termination operational amplifier IC2 of resistance R 5, the output terminal of operational amplifier IC2 is through the capacitor C 6 of series connection, the inverting input that resistance R 6 meets operational amplifier IC3, the in-phase input end ground connection of operational amplifier IC3; The inverting input of operational amplifier IC3 connects the output terminal of operational amplifier IC3 through resistance R 7, and the output terminal of operational amplifier IC3 is through capacitor C 7 contact Power Generation Roads.
Trigger circuit comprise triode Q1, isolating transformer T, relay J, diode V1, diode V2, diode V3, diode V4 and diode V5; Diode V2, diode V3, diode V4 and diode V5 form full bridge rectifier; One termination capacitor C7 of isolating transformer T primary coil, the other end ground connection of isolating transformer T primary coil, an input end of a termination full bridge rectifier of isolating transformer T secondary coil; The other end of isolating transformer T secondary coil connects another input end of full bridge rectifier through the normal open switch K of relay J; The base stage connection control circuit 1 of triode Q1, the grounded emitter of triode Q1, the collector of triode Q1 connects the positive pole of diode V1; The negative pole of diode V1 connects power supply, and the coil of relay J is parallelly connected with diode V1.
When detecting when disconnected cable occurring, control circuit 1 is output as high level, makes triode Q1 conducting, the relay J adhesive; The dtmf signal that while dial-up circuit 3 sends is added on the isolating transformer T after operational amplifier IC2 and operational amplifier IC3 amplification; Secondary, full bridge rectifier through isolating transformer T are added to external telephone wire TP1, TP2 end, thereby realize dialing of alarm call.Behind the other side's off-hook, the voice signal of warning is also through passing to outside line after operational amplifier IC2 and the operational amplifier IC3 amplification.
As shown in Figure 4; Dial-up circuit 3 comprises IC 4, capacitor C 8, capacitor C 9, crystal oscillator G; The model of IC 4 is the dtmf signal generator of HT9200A, and crystal oscillator G is connected between two crystal oscillator incoming ends of IC 4, and capacitor C 8, capacitor C 9 and crystal oscillator G form the 3.58MHz crystal oscillator; The end of crystal oscillator G is through capacitor C 8 ground connection; The other end of crystal oscillator G is through capacitor C 9 ground connection, the chip selection signal input end CS of IC 4, serial signal synchronous input end SK and serial signal input end DATA connection control circuit 1, the power supply positive input termination power supply of IC 4; The answer the call capacitor C 5 of interface circuit 4 of the dtmf signal output terminal of IC 4, the power-input end grounding of IC 4.Adopt dtmf signal generator; Use the 3.58MHz crystal oscillator; This chip has characteristics such as low-power consumption, total harmonic distortion be low; Dtmf signal generator can be produced 16 kinds of two-frequency signals and 8 kinds of simple signals and exported to telephone interface circuit 4 by the dtmf signal output terminal by control circuit 1 control, thereby realizes dialing.
As shown in Figure 5, bell flowing detecting circuit 5 comprises IC 5, resistance R 8, resistance R 9, resistance R 10, capacitor C 10, capacitor C 11, capacitor C 12 and photoelectrical coupler OC, and the model of IC 5 is the ring detection chip of LS1240; 1 pin and 8 pin of IC 5 are respectively the ringing-current input end, and 2 pin are earth terminal, and 3 pin are oscillation frequency setting-CSET end; 4 pin are oscillation frequency setting-RSET end, and 5 pin are output terminal, and 7 pin are the rectifying and wave-filtering end; 1 pin of IC 5 is through the resistance R 8 of series connection and the capacitor C 10 line TP1 that answers the call, the 8 pin line TP2 that answers the call, and 7 pin connect an end of capacitor C 11; 3 pin connect an end of capacitor C 12; The end of 4 pin connecting resistance R9,2 pin connect the other end of capacitor C 11, the other end of capacitor C 12 and the other end of resistance R 9, and 5 pin of IC 5 connect the input end of photoelectrical coupler OC through resistance R 10; Another input end grounding of electric coupler OC, the output terminal connection control circuit 1 of photoelectrical coupler OC.
When disconnected cable appears in cable, dial the police emergency number, after the other side's off-hook is answered; Again during clawback, 70-120V, the ringing signal of 25Hz can be added to the ring detection chip through C10 after straight, R8 current limliting; Portion exports from 5 pin through the oscillator and the amplifier generation ringdown of inside, again through photoelectrical coupler output digital signal to control circuit 1 behind rectifying and voltage-stabilizing within it; After control circuit 1 detects, stop to report to the police.
Claims (1)
1. automatic detection alarm of breakpoints of communication cable, it is characterized in that: said alarm comprises control circuit (1), monostable circuit (2), dial-up circuit (3), telephone interface circuit (4) and the bell flowing detecting circuit (5) of electrical connection;
Monostable circuit (2) comprises IC 1, capacitor C 1, capacitor C 2, resistance R 1 and resistance R 2; The earth terminal of IC 1 meets the control voltage end CVOLT of IC 1 through capacitor C 2, and the trigger end TRIG of IC 1 connects an end of capacitor C 1 and an end of resistance R 1, and the other end contact of capacitor C 1 is signaled; Another termination power of resistance R 1; The reset terminal R of IC 1 connects power supply, and the threshold value end THR of IC 1 connects the discharge end DIS of IC 1 and an end of resistance R 2, and the threshold value end THR of IC 1 connects a cable through external cable interface circuit (8); Another root cable grounding, another termination power of resistance R 2;
Dial-up circuit (3) comprises IC 4, capacitor C 8, capacitor C 9 and crystal oscillator G; Crystal oscillator G is connected between two crystal oscillator incoming ends of IC 4; The end of crystal oscillator G is through capacitor C 8 ground connection; The other end of crystal oscillator G is through capacitor C 9 ground connection, the chip selection signal input end of IC 4, serial signal synchronous input end and serial signal input end connection control circuit (1), the power supply positive input termination power supply of IC 4; The answer the call capacitor C 5 of interface circuit (4) of the signal output part of IC 4, the power-input end grounding of IC 4;
Telephone interface circuit (4) comprises amplifying circuit and trigger circuit; Amplifying circuit comprises operational amplifier IC2, operational amplifier IC3, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 4, capacitor C 5, capacitor C 6 and capacitor C 7; The in-phase input end ground connection of operational amplifier IC2; The end of the inverting input connecting resistance R3 of operational amplifier IC2, an end of resistance R 4 and an end of resistance R 5; The other end of resistance R 3 connects the AUD sound signal through capacitor C 4, and the other end of resistance R 4 connects dial-up circuit (3) through capacitor C 5, the output terminal of another termination operational amplifier IC2 of resistance R 5; The output terminal of operational amplifier IC2 is through the capacitor C 6 of series connection, the inverting input that resistance R 6 meets operational amplifier IC3; The in-phase input end ground connection of operational amplifier IC3, the inverting input of operational amplifier IC3 connects the output terminal of operational amplifier IC3 through resistance R 7, and the output terminal of operational amplifier IC3 is through capacitor C 7 contact Power Generation Roads;
Trigger circuit comprise triode Q1, isolating transformer T, relay J, diode V1, diode V2, diode V3, diode V4 and diode V5; Diode V2, diode V3, diode V4 and diode V5 form full bridge rectifier; One termination capacitor C7 of isolating transformer T primary coil, the other end ground connection of isolating transformer T primary coil, an input end of a termination full bridge rectifier of isolating transformer T secondary coil; The other end of isolating transformer T secondary coil connects another input end of full bridge rectifier through the normal open switch K of relay J; The base stage connection control circuit (1) of triode Q1, the grounded emitter of triode Q1, the collector of triode Q1 connects the positive pole of diode V1; The negative pole of diode V1 connects power supply, and the coil of relay J is parallelly connected with diode V1;
Said bell flowing detecting circuit (5) comprises IC 5, resistance R 8, resistance R 9, resistance R 10, capacitor C 10, capacitor C 11, capacitor C 12 and photoelectrical coupler OC; A ringing-current input end of IC 5 is through the resistance R 8 of series connection and the capacitor C 10 line TP1 that answers the call; Another ringing-current input end line TP2 that answers the call; The end of rectifying and wave-filtering termination capacitor C11, the end of oscillation frequency setting-CSET termination capacitor C12, the end of oscillation frequency setting-RSET terminating resistor R9; The other end, the other end of capacitor C 12 and the other end of resistance R 9 of ground termination capacitor C11; The output terminal of IC 5 connects the input end of photoelectrical coupler OC, another input end grounding of electric coupler OC, the output terminal connection control circuit (1) of photoelectrical coupler OC through resistance R 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010179810XA CN101865965B (en) | 2010-05-24 | 2010-05-24 | Automatic detection alarm of breakpoints of communication cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010179810XA CN101865965B (en) | 2010-05-24 | 2010-05-24 | Automatic detection alarm of breakpoints of communication cable |
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| Publication Number | Publication Date |
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| CN101865965A CN101865965A (en) | 2010-10-20 |
| CN101865965B true CN101865965B (en) | 2012-07-04 |
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| CN201010179810XA Expired - Fee Related CN101865965B (en) | 2010-05-24 | 2010-05-24 | Automatic detection alarm of breakpoints of communication cable |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201716388U (en) * | 2010-05-24 | 2011-01-19 | 山东科技大学 | Communication cable break-point automatic detection alarm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201716388U (en) * | 2010-05-24 | 2011-01-19 | 山东科技大学 | Communication cable break-point automatic detection alarm |
Non-Patent Citations (3)
| Title |
|---|
| 仲兆团.CS8204和LS1240振铃集成电路简介.《电信技术》.1996,(第3期),44-45. * |
| 廖晓东.通信电缆故障电容测距系统设计.《闽江学院学报》.2005,第25卷(第2期),50-52. * |
| 李学海.数控DTMF发生器HT9200及其应用.《实用无线电》.1998,(第2期),4-6、17. * |
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| CN101865965A (en) | 2010-10-20 |
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Granted publication date: 20120704 Termination date: 20130524 |