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A Collision Warning Method for Highway Guardrail Based on Distributed Optical Cable Sensing

A highway guardrail, distributed technology, applied in the direction of alarms, instruments, etc., can solve the problem of guardrail accident expansion, etc., and achieve the effect of simple structure, strong adaptability and low construction cost

Active Publication Date: 2017-02-08
GUILIN G LINK TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In highway operation, the guardrail of the highway is often damaged due to the collision of vehicles, and the failure to detect the damage of the guardrail in time will lead to the expansion of the accident

Method used

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  • A Collision Warning Method for Highway Guardrail Based on Distributed Optical Cable Sensing

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Embodiment

[0028] refer to figure 1 , a highway guardrail collision warning device based on distributed optical cable sensing, including Φ-OTDR module 1, white light interference module 2, wavelength division multiplexer 3, sensing optical cable 4, optical fiber reflector 5, wavelength division multiplexer 3. The common port is connected to a near-end optical fiber in the sensing optical cable 4; the other two interfaces of the wavelength division multiplexer 3 are respectively connected to the input and output interfaces of the Φ-OTDR module 1 and the input and output interfaces of the white light interference module 2, and the Φ-OTDR The optical signal of the module 1 and the optical signal of the white light interference module 2 are multiplexed to the optical fiber in the sensing optical cable 4; the optical fiber reflector 5 is connected to the far end of the sensing optical cable 4, and reflects the optical signal of the white light interference module 2 back.

[0029] The waveleng...

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Abstract

The invention discloses a road guardrail bump alarm method based on distributed cable sensing. The method comprises a step of fixing a cable with a road guardrail and further comprises steps that: 1), a phi-OTDR tests a fiber in a real time mode; 2), a gradient value of a final signal data sequence acquired in the step1) is acquired through calculation, and an abrupt change point of the signal data sequence gradient value is found out; 3), according to a time value of a backward scattering signal acquired in the step2) and a transmission rate of a light signal in the fiber, length of the fiber is acquired through calculation: 4), according to the fiber length acquired in the step 3), length of the cable is acquired through calculation, and a bumped position of the cable is then determined; 5), a bump audio signal is recorded; and 6), according to the generation time of vibration, audio signals recorded in the step 5) near the generation time segment are extracted, and the bumped position of the cable is a bumped position of the road guiderail. The road guardrail bump alarm method has advantages of wide monitoring scope, strong monitoring timeliness and fast fault response. The invention further discloses a road guardrail bump alarm device based on distributed cable sensing.

Description

technical field [0001] The present invention relates to the field of optical cable sensing, in particular to OTDR (Optical Time Domain Reflectometer, Optical Time Domain Reflectometer) technology, optical fiber coherent detection technology and optical cable vibration sensing technology, specifically a road guardrail collision based on distributed optical cable sensing Alarm method and device. Background technique [0002] In highway operation, highway guardrails are often damaged due to vehicle collisions, and accidents may expand due to failure to detect guardrail damage in time. Contents of the invention [0003] The purpose of the present invention is to provide a road guardrail collision warning method and device based on distributed optical cable sensing, which can realize collision warning and positioning of road guardrails, wide monitoring range, strong real-time monitoring, and fast fault response; The device has low construction cost, simple structure, convenien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/00G08B25/00
Inventor 蒋宗伯黄凤玲赵奎文金朝刘丹蕾彭怀敏蒋海霞
Owner GUILIN G LINK TECH
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