Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Railway roadbed state monitoring system
The invention discloses a railway roadbed state monitoring system which comprises a railway roadbed state monitoring system body; the railway roadbed state monitoring system body comprises a set of distributed optical fiber sonic sensors, a sensing optical fiber laid along a railway roadbed, vibration waves generated when a train travels along a railway, and a railway roadbed state alarm. The railway roadbed state alarm is connected with the distributed optical fiber sonic sensors through a line; the distributed optical fiber sonic sensors are connected with the sensing optical fiber; and the sensing optical fiber is laid below the railway roadbed and used in cooperation with the vibration waves. The railway roadbed state monitoring system is based on a principle of coherent Rayleigh scattering, adopts single-core common single-mode communication optical cables as the sensors, and utilizes the characteristic that the optical fiber is sensitive to the sound (vibration) waves, so that when external vibration acts on the sensing optical fiber, the refractive index and length of the optical fiber are slightly changed due to an elasto-optical effect. Therefore, the phase change of a transmission signal in the optical fiber is caused, and the light intensity is changed.
本发明公开了一种铁路路基状态监测系统，包括铁路路基状态监测系统，铁路路基状态监测系统包含一套分布式光纤声波传感器、一根沿铁路路基铺设的传感光纤、列车沿铁路行驶时产生的振动波和铁路路基状态报警器，铁路路基状态报警器通过线路与分布式光纤声波传感器相连接，分布式光纤声波传感器与传感光纤相连接，传感光纤铺设于铁路路基的下方且配合振动波使用。本发明的实施监测系统是基于相干瑞利散射的原理，采用单芯普通单模通信光缆作为传感器，利用光纤对声波(振动)敏感的特性，当外界振动作用于传感光纤上时，由于弹光效应，光纤的折射率、长度将产生微小变化，从而导致光纤内传输信号的相位变化，使得光强发生变化。
Railway roadbed state monitoring system
The invention discloses a railway roadbed state monitoring system which comprises a railway roadbed state monitoring system body; the railway roadbed state monitoring system body comprises a set of distributed optical fiber sonic sensors, a sensing optical fiber laid along a railway roadbed, vibration waves generated when a train travels along a railway, and a railway roadbed state alarm. The railway roadbed state alarm is connected with the distributed optical fiber sonic sensors through a line; the distributed optical fiber sonic sensors are connected with the sensing optical fiber; and the sensing optical fiber is laid below the railway roadbed and used in cooperation with the vibration waves. The railway roadbed state monitoring system is based on a principle of coherent Rayleigh scattering, adopts single-core common single-mode communication optical cables as the sensors, and utilizes the characteristic that the optical fiber is sensitive to the sound (vibration) waves, so that when external vibration acts on the sensing optical fiber, the refractive index and length of the optical fiber are slightly changed due to an elasto-optical effect. Therefore, the phase change of a transmission signal in the optical fiber is caused, and the light intensity is changed.
本发明公开了一种铁路路基状态监测系统，包括铁路路基状态监测系统，铁路路基状态监测系统包含一套分布式光纤声波传感器、一根沿铁路路基铺设的传感光纤、列车沿铁路行驶时产生的振动波和铁路路基状态报警器，铁路路基状态报警器通过线路与分布式光纤声波传感器相连接，分布式光纤声波传感器与传感光纤相连接，传感光纤铺设于铁路路基的下方且配合振动波使用。本发明的实施监测系统是基于相干瑞利散射的原理，采用单芯普通单模通信光缆作为传感器，利用光纤对声波(振动)敏感的特性，当外界振动作用于传感光纤上时，由于弹光效应，光纤的折射率、长度将产生微小变化，从而导致光纤内传输信号的相位变化，使得光强发生变化。
Railway roadbed state monitoring system
一种铁路路基状态监测系统
LIANG WENBO (Autor:in) / LIANG QILIN (Autor:in) / ZHANG JINJIE (Autor:in) / ZHANG YU (Autor:in)
27.08.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
/
E01B
PERMANENT WAY
,
Gleisoberbau
/
G01H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
,
Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen
/
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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