Study on Soil Landslide by Optical Metrology
A new optical metrology method for measuring soil landslide displacement is presented in this paper. Under the optical experimental system, the soil micro-displacement field can be measured by obtaining the digital images of the soil specimen under water load and searching the gray value in sub-pixels by digital image surface fitting technology. The results show that through the optical system, this nondestructive testing method can improve the measurement accuracy, and has a very good prospect of application in the study of soil landslide. The experimentation can provide useful data for disaster prevention and mitigation research and actual construction. In addition, if using a CCD with higher resolution and more effective record area, or using synthetic aperture technology to increase effective record area, the accuracy of the experiment are expected to be further enhanced.
Paul P. Lin and Chunliang Zhang
W. W. Liu et al., "Study on Soil Landslide by Optical Metrology", Applied Mechanics and Materials, Vols. 105-107, pp. 2015-2018, 2012