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High-speed rail long-span foundation micron subsidence decoherent optical monitoring system and method

An optical monitoring, large-span technology, used in measuring devices, liquid/fluid solids measurement, instruments, etc., can solve problems such as inability to meet high precision and inapplicability, and achieve stable structure, stable performance, and good environmental adaptability.

Active Publication Date: 2016-01-20
DALIAN UNIV OF TECH
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Problems solved by technology

However, because GPS needs to observe satellites, it is not suitable for tunnels or areas where it is difficult to observe satellites, and its accuracy is best at 10 cm, which is far from meeting high precision

Method used

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  • High-speed rail long-span foundation micron subsidence decoherent optical monitoring system and method
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  • High-speed rail long-span foundation micron subsidence decoherent optical monitoring system and method

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with accompanying drawing

[0037] High-speed railway large-span foundation micron subsidence low-coherence optical monitoring system, consisting of a central liquid storage tank 31, a reference liquid storage tank 1; multiple test liquid storage tanks, liquid connection pipes 28, gas connection pipes 29, observation pipes 30, and low-coherence optical sensors , low-coherence optical liquid level measurement and signal transmission system and computer; the central liquid storage tank 31 and the reference liquid storage tank 1 are located on the foundation of the non-subsidence area, and a plurality of test liquid storage tanks are located on the foundation of the subsidence area; all storage tanks The upper part of the liquid tank is gas; the bottom ends of all the liquid storage tanks communicate with each other through the liquid connection pipeline 28, and the upper ends communicate with each other...

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Abstract

The invention relates to a low coherence optical monitoring system and method for micron settlement of the long-span foundation of a high speed railway, and belongs to the technical field of photo-electro-mechanical integration measurement. A central liquid storage tank and a reference liquid storage tank are arranged on the foundation of a non-settlement area; a plurality of testing liquid storage tanks are arranged on the foundation of a settlement area; the upper half parts of the liquid storage tanks are filled with gas; the bottom ends of the liquid storage tanks are communicated with one another through a liquid connecting pipeline; the upper ends of the liquid storage tanks are communicated with one another through a gas connecting pipeline; the liquid connecting pipeline for communicating the liquid storage tanks is communicated with the gas connecting pipeline for communicating the liquid storage tanks through a vertical observation pipeline; low coherence optical sensors are mounted inside the testing liquid storage tanks. A signal transmission system converts the measured optical information into an electric signal to be input into a computer, and the settlement is displayed in real time. The low coherence optical monitoring system is stable in performance and is not influenced by severe environments such as a tunnel, and the low coherence optical monitoring method is a novel optical fiber settlement monitoring method suitable for existing structures and new structures.

Description

technical field [0001] The invention relates to a low-coherence optical monitoring method for micron subsidence of large-span foundations of high-speed railways. It is a measurement system combining optical fiber transmission, low-coherence optical interference and precision leveling technology, and belongs to the field of optical-mechanical-electrical integration measurement technology. Background technique [0002] Settlement monitoring is an important indicator of long-span civil structures such as high-speed railways. At present, precision levels, precision triangular elevation measurements, and global satellite positioning systems (GPS) are commonly used for ground and bridge foundation settlement monitoring. The precision leveling survey developed by Kang Company is the main method used in high-speed railway settlement monitoring. Due to the cost of monitoring, precision triangular elevation measurement is a supplement to precision leveling, and these two methods play ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/04
CPCG01F23/292
Inventor 孙长森张平磊魏鹤鸣赵雪峰
Owner DALIAN UNIV OF TECH
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