A Scheme for Excavation Displacement Monitoring Based on Image Processing

Abstract:

Geotechnical monitoring is integral part of each excavation project and usually done with manual manner. This study proposes a new monitoring method, which combines with image processing and wireless communication to break traditional one. The scheme uses image sensors to capture the images of the cooperative boards. The camera system is calibrated by Zhang Zhengyou calibration method beforehand. Digital signal processors in the image acquisition module generate the undistorted version of the images by the calibration results and utilize Harris corner detection algorithm to extract grid corners’ coordinates. Then these coordinates are sent to the data processing center through wireless sensor network. In the data processing center, the computer calculates the real displacement of the target by the extrinsic parameters of the camera. The experiment in this paper proves that the systematic accuracy satisfies the national standard. The system realizes the automatic real-time monitoring to excavation works.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 1923-1926
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.1923
• Online since: November 2012
• Authors: Mao Heng Sun, Yi Xin Zhao, Wei Jiang, Tian Tian Feng
• Keywords: Displacement Detection, Excavation Monitoring, Image Processing, Sub-Pixel, Wireless Sensor Network (WSN)

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