Monostable circuit of automatic detection warning instrument for communication cable breakpoint

Abstract

The invention relates to a monostable circuit of an automatic detection warning instrument for communication cable breakpoints. The warning instrument comprises a control circuit and a monostable circuit electrically connected, wherein, the monostable circuit comprises an integrated circuit IC1, a capacitor C1, capacitor C2, a resistor R1 and a resistor R2; the earth terminal of the integrated circuit IC1 is connected with a control voltage end through the capacitor C2; the triggering end is connected with one end of the capacitor C1 and one end of the resistor R1; the other end of the capacitor C1 is connected with a triggering signal; the other end of the resistor R1 is connected with a power supply; the reset terminal is connected with the power supply; the threshold end is connected with the discharge end and one end of the resistor R2; the other cable is earthed; the other end of the resistor R2 is connected with the power supply; the monostable circuit and the control circuit are used to be matched to perform real-time detection on the cable breakpoints and judge the distance of breakpoints; the standby outer cable can be monitored only by simple arrangement, when the cable is stolen or fails, the distance of cable breakpoints can be rapidly measured, and audio alarm is performed by dialing the telephone number stored in advance.

Description

technical field [0001] The invention relates to a detection and alarm device, in particular to a monostable circuit of the detection and alarm device capable of automatically detecting breakpoints of communication cables, 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 b...

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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