Automatic detection alarm of breakpoints of communication cable

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 [0001] The invention relates to a detection and alarm device, in particular to a detection and alarm device capable of automatically detecting communication cable breakpoints, which belongs to the field of electronic technology. Background technique [0002] With the rapid development of modern communication, there are more and more communication lines of various types, and the network layout is complex. With the development of cities, the excavation of urban roads is also increasing, so that communication lines are not only affected by natural forces, but also cause communication cables to appear. Breakpoints are also affected by some human factors, such as road excavation and cable theft, which cause breakpoints in communication cables, which affect the operation of the entire communication network. How to grasp the on-off status of various communication cables in a timely and reliable manner, at present, only when there is a breakpoint failure in the commu...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of modern communication, there are more and more communication lines of various types, and the network layout is complex. With the development of cities, the excavation of urban roads is also increasing, so that communication lines are not only affected by natural forces, but also communication cables appear. The situation of breakpoints is also affected by some human factors, such as road excavation and cable theft, which cause breakpoints in communication cables, which affect the operation of the entire communication network

How to grasp the on-off status of various communication cables in a timely and reliable manner, at present, only when there is a breakpoint fault in the communication cable, only use special tools to detect the on-off of the communication line on site. The efficiency of this detection method is relatively low. A lot of manpower and material resources are wasted, which brings great difficulties to the timely maintenance of communication cables, and cannot adapt to the development of the communication industry, affecting the service quality of the entire communication industry

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