Rockefeller Refuge Gulf Shoreline Protection Demonstration

Geesey, Brett L.; Heilman, Daniel J.; McPherson, Ronald L.

doi:10.1061/41190(422)55

Cited by 1 publication

(1 citation statement)

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“…So, how to accurately measure and control the ballastless track settlement has become a common concern in this filed. Currently, there are some methods available for the ballastless track settlement measurements, such as settlement monitoring piles [1], settlement plates [2], inclinometer [3,4], GPS (Global Positioning Sys-tem) technology [5]. However, these methods have the disadvantages of low accuracy and low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Online Surface Settlement Monitoring System of Ballastless Track with Difference Image Style

Min

Dang

Zhang

2013

AMM

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In order to achieve the online surface settlement monitoring of ballastless track,an online surface settlement monitoring system with difference image type has been established, of which the components, the preprocessing measures of images, the precise positioning methods of laser spot have also been researched. The device mainly contains a dot laser and a point-position measurement device that uses a CCD to detect the position change of the laser spot image. Any position change of the dot laser can be measured and the settlement for one point can be obtained remotely. The multi-point settlements can be obtained by using a series of such devices. Some methods such as automatic background sub-tractions and high-precision method for locating the centers of laser spots have been adopted to enhance the stability, adaptability and accuracy of the measurement system. The device has been used in some railway sites and it has the advantages of high accuracy, low-cost and easy installation.

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Section: Introductionmentioning

confidence: 99%