What's New
Remote Real-Time Monitoring for UCLA Test Levee
August 30, 2011
Geodaq provides real-time levee monitoring for researchers at UCLA. Geodaq's in-place inclinometer with a high density of MEMS accelerometer sensors was chosen to accurately monitor settlement of the test levee system. Pore water pressures and string pot displacements are also being monitored using Geodaq GST network modules. Results are viewable in real-time using interactive software that runs in a standard web browser.
Scientists shake fragile Delta levee in hope of averting statewide catastrophe
Newly Developed Dynamic Test Pile Uses Geodaq GST Modules
June 2011
Researchers at UC Davis are working with Caltrans to develop a reusable instrumented test pile to be used at the site investigation phase of a project to improve deep foundation design. Geodaq is working with the project team to develop a digital network of high-speed measurement devices capable of withstanding repeated impact forces exceeding 1,000g. See page 42 for the complete story.
"Developed Test Pile Intended to Improve Pile Design" - Civil Engineering – ASCE, June 2011
Geodaq Presents Paper on Perris Dam at USSD Conference
April 2011
Geodaq presents paper at the 31st Annual USSD Conference in San Diego, California. The presentation provided an in-depth look at how the Internet provides a reliable way to collect and disseminate tangible field monitoring results during excavation construction work at the toe of Perris Dam in Riverside County, California. Perris Dam is a 125-foot high earth dam extending 2.2 miles in length and is located immediately upstream from residential neighborhoods. Geodaq is an organizational member of the United States Society on Dams and was also an exhibitor at the conference.
Geodaq INC500 and Seismic Testing of Earth Retaining Walls
October 2009
Geodaq MEMS based inclinometers used by researchers at UC Davis to monitor deformations for seismic testing of earth retaining walls at the UC San Diego shake table facility.
"Simulated Quakes Test Retaining Wall Design" CBS News, October 2, 2009
John Lemke Presents Paper at Annual TRB Meeting
January 2008
John Lemke presents paper at the 87th Annual Meeting of the Transportation Research Board in Washington, DC. The topic included remote monitoring of an active landslide using innovative high-density network of MEMS accelerometer sensors. Monitoring results helped engineers at Caltrans characterize the extent of the active landslide and the direction of landslide movement. The ability of the Geodaq in-place inclinometer to withstand significant shear displacements provided a unique opportunity to investigate the existence of deeper failure surfaces.
John Lemke Presents Paper on Remote Internet Based Vibration Monitoring
March 2000
John Lemke presents paper on a new Internet based data collection system for a session on the Nondestructive Evaluation of Highways, Utilities and Pipelines at a conference for the International Society for Optics and Photonics (SPIE) in San Diego, California. The paper provided a description of one of the first web-based data collection and delivery systems developed for civil engineering field monitoring applications. The Geodaq remote data collection system dynamically acquired vibrations signals from a MEMS accelerometer sensor and calculated relevant frequency and peak velocity values and transmitted the results to a web server. Peak velocity and frequency values were available in real-time via web browser applications for immediate comparison to several criteria.
Lemke, J. (2000). "Remote vibration monitoring system using wireless internet data transfer."