Passive tension fence intrusion detection system

Abstract

The invention discloses a passive tension fence intrusion detection system, which includes a passive detector, a tension barbed wire and a signal line; in a normal state, the tension barbed wire maintains a fixed tension, and the passive detector maintains a state of tension balance. The movable contact and the static contact at the lower part of the sensing spindle are in a normally open state; in an abnormal state, the tension between several tension barbed wires is unbalanced, and the viscoelastic inverter material body becomes temporary after being stressed. The position of the static contact is relatively fixed by a solid body, and after the relative movement of the sensing spindle, the moving contact and the static contact are triggered, so that an alarm signal is generated after the signal line is closed. The invention has a purely mechanical structure, the passive detector does not contain any electronic components, and the design value of the mean time between failures of the product is 25 million hours; it has the advantages of low cost, long service life and wide application range.

Description

technical field [0001] The invention relates to the technical field of tension fences, in particular to a passive tension fence intrusion detection system. Background technique [0002] With the continuous improvement of people's living standards, people pay more and more attention to safety, and a lot of safety protection products have been produced, which are widely used in residential quarters, enterprises and institutions, government agencies, schools, factories, substations, Railways, key protected areas and other places. Nowadays, products such as vibration cables and infrared cross-radiation are easily affected by the external environment and cause false alarms. For example, vibration cables are easily affected by vehicles, lightning, etc. and cause false alarms. Infrared detection products have higher requirements for the environment. In the case of shading, strong light, animals coming in and out, or heavy wind and rain, these are prone to false alarm information, ...

AI Technical Summary

Problems solved by technology

Vibrating optical fiber has certain advantages, but it is expensive and easily corroded by sewage, which affects the reliability of the detection system

[0006] The applicant has invented a variety of fence intrusion detection systems, such as an intrusion detection grid system recorded in Chinese patent CN202020130388.8, and a tension fence intrusion prevention detection system recorded in Chinese patent CN201922011016.3. These products all need power supply , high cost, limited applicable area and other issues

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