Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Monitoring for settlement of railroad bed

A railway roadbed and roadbed technology, applied in the direction of hydrostatic pressure, etc., can solve the problems of monitoring railway settlement, etc., and achieve the effect of strong adaptability, simple structure and good repeatability

Inactive Publication Date: 2013-06-26
NUCTECH CO LTD
View PDF6 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It is known that there is currently no case of using fiber grating sensor network analysis system to monitor railway settlement in the world

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Monitoring for settlement of railroad bed
  • Monitoring for settlement of railroad bed
  • Monitoring for settlement of railroad bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the signal acquisition subsystem shown in Embodiment 1, through water pressure monitoring, it mainly includes a water tank and a water channel laid on site, an optical fiber grating sensor, an optical fiber network, and an optical fiber grating demodulator.

[0031]As shown in Figure 2 and Figure 3, the basic principle of the information collection subsystem is: by laying soft water pipes under the railway subgrade, and installing fiber optic grating sensors on the top of the water pipes to detect the water pressure changes of the corresponding pipelines. When settlement occurs, the pipeline will sink with the settlement, and its position change will cause the water pressure measured by the sensor to change. The grating fiber optic sensor senses the settlement by detecting the change of water pressure in the pipeline.

[0032] Wherein, the water pipe and the sensor are generally arranged in a suitable layer in the subgrade, such as a sandy soil filling layer...

Embodiment 2

[0049] According to Embodiment 2, another acquisition subsystem for collecting settlement information includes: installing an optical fiber grating sensor for measuring pressure changes in the settlement layer of the roadbed.

[0050] Wherein, the railway embankment can generally be divided into several layers, and each layer is covered with the upper layer after compaction. Generally, there are one or several layers prone to subsidence. Specifically, a pre-set plate is set at a certain position on the top of the layer that is prone to settlement, which separates the layer that is easy to settle (such as sand and soil landfill) and the non-settling layer (such as stone filling or cement pouring layer), and the lower surface can be A fiber grating pressure sensor is provided for measuring the pressure exerted by the sensed sedimentation layer on it. In the case of subsidence, the pressure it measures decreases until it reaches zero. In this way, the subsidence situation at a ...

Embodiment 3

[0057] According to Embodiment 3, another information collection and analysis system is proposed, including: setting an optical fiber grating sensor structure for measuring relative displacement in the subsidence layer of the roadbed. Specifically, as shown in Figures 6a and 6b, a sleeve and a pole are set at each position, wherein the sleeve is relatively fixed due to friction with each layer, and the pole moves downward with the settlement of the sedimentation layer. A fiber grating displacement sensor is arranged at a certain position of the casing or the pole. By measuring the relative displacement between the casing and the pole, it is possible to measure whether and how much settlement has occurred.

[0058] The signal acquisition subsystem according to Embodiment 3 can also be represented by FIG. 4 . The information collection subsystem includes: a distributed array of optical fiber grating displacement sensors, optical fiber cables, and optical fiber grating demodulat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a monitoring system for settlement of a roadbed. The monitoring system comprises a settlement information acquiring system, a settlement information analysis system and an alarming system; and when in use, the settlement information analysis system determines the condition that the settlement occurs and / or the settlement reaches the dangerous level, and an alarm signal and / or intelligence information is sent in one or more ways.

Description

technical field [0001] The invention relates to the field of railway operation safety monitoring, in particular to the monitoring of railway embankment settlement. Background technique [0002] At present, the railway system is in a period of rapid construction and development. At the same time, railway transportation safety is also facing more challenges and tests. The surrounding environment of railways is more complex, the natural climate environment changes frequently, and disaster weather increases, which has a negative impact on railway transportation safety, especially the operation safety of high-speed rail. [0003] For the consideration of comprehensive protection, various new technologies have been developed, such as vehicle-mounted detection devices, high-speed camera technology, GPS infrared detection technology, microwave wireless detection, etc., which are widely used in positioning and monitoring, providing effective protection for railway safety permits and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/04
Inventor 钱鸿治温海宁张植俊杨小军赵金霞梁立志
Owner NUCTECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com