L. Wang, who working at Chuo Kaihatsu Corporation, is a senior manager of geotechnical engineering with expertise in rain-induced slope instability, earthquake-induced slope instability, development of slope monitoring and alarm system. He undertook his PhD at the University of Tokyo, Japan, after graduation he is engaged in the research and development of the monitoring of landslide and slope failures in the long term.
Recently he carries out the research, supported by cabinet office, government of Japan, and finished the SIP (Cross ministerial Strategic Innovation Promotion Program) research during 2014-2017, which theme is R&D of Early Warning Monitoring System of Slope Failure Based on Multi-point Tilt Change by using IoT and MEMS technology. The results of research are now deployed to Japan, Australia, Taiwan, China and India during last ten years.
Talk Title: An Early Warning System of Landslide by Multi-Point MEMS Tilting Sensors Technology
(The case studies of IoT technology and MEMS technology which used to landslide and slope failures in Japan, Australia, India, Taiwan and China)
An early warning monitoring system is one of the most effective ways to reduce disasters induced by slope instabilities. Many large-scale disasters induced by rainfall and earthquakes occurred in the world, and many people’s life were lost by the disasters. To reduce vulnerability to such slope and landslide hazards, an early warning system becomes important, and for this purpose, a newly developed simple and low-cost early warning system for slope failure and landslides is presented here. The new system is based on a tilt sensor that is easy to install. The sensor can monitor water content and slope deformation with a tilt Micro Electro Mechanical Systems (MEMS) module embedded in the sensor unit, and it can transfer real time data via a wireless network based on IoT technology. Since 2010, the monitoring system has been used in many actual large-scale slope failure and landslide sites to validate field performance. We report on several monitoring cases by using IoT sensor technology to show that the early warning system adequately monitors the stability of landslide, slope failure fields in Japan, Australia, India, Taiwan and China. Based on the field site test results, the monitoring method is proposed for regions of increased hazard of earthquake-induced slope failure.
This research has been supported by SIP (the Cross-ministerial Strategic Innovation Promotion Program) of the Cabinet Office of Government of Japan, Grants-in-Aid for Scientific Research of the Japan Society for the Promotion of Science (JSPS), Core-to-Core Program “B. Asia-Africa Science Platforms” (JSPS), Construction Technology Research and Development Subsidy Program of the Ministry of Land, Infrastructure, Transport and Tourism of Japan, and International Cooperation Project of the Chinese Ministry of Science and Technology (projects: 07(2007DFA21150) and 09(2009DFB20190)).