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Lehigh University logo
Lehigh University logo

Kate Koser

Mobile Wireless Sensors in Structural Health Monitoring

Department: Civil and Environmental Engineering
Advisor: Shamim Pakzad

View: UGRS Research Poster (PDF)

Structural Health Monitoring is the process of assessing the health or damage state of structures by using technology and algorithms. This helps engineers with the maintenance and safety of structures. A newly developing technology for SHM is mobile wireless sensor networks. Mobile wireless sensors are dynamic sensors that collect acceleration or vibrational data from structures, which is used in modal system identification. When compared to static sensor networks, mobile sensing networks have many advantages. Mobile sensing networks require fewer sensors to collect vibrational data. Mobile sensing networks also offer less restricted sampling locations, have reduced setup, and have reduced costs. The practicality and accuracy of mobile sensing networks must be analyzed for long span bridges. The wireless sensors used during experimentation consist of a ISM400 sensor board, a IPR2420 Imote2 and a IBB2400CA battery board. A steel beam was constructed in ATLSS serving as a bridge for the wireless sensors. A network setup on the steel beam consists of four parallel lines of belts serving as traffic lanes. Theses belts are connected to a motor to allow sensing carts to move along the span of the beam. Multiple sensor configurations with different motor speeds are tested on the beam. Vibrational data collected from the sensors along with position vectors of the sensors are used in modal identification. The modal identification results document the accuracy and feasibility of the mobile wireless sensors.

About Kate Koser:
Kate Koser is a junior at Lehigh University pursuing a B.S. in Civil Engineering with a minor in Earth and Environmental Sciences. Koser has been researching mobile wireless sensors since the spring of 2015 with her advisor, Dr. Shamim Pakzad. She worked at ATLSS during the summer of 2015 to test the reliability and accuracy of mobile wireless sensors on long span bridges. She is also involved in several leadership positions on campus, including the National Society of Leadership and Success and as a manager at Taylor Gym. Koser is also involved in South Bethlehem Project. She plans to earn her master’s degree after graduating from Lehigh.