Enhancement and Field Test Evaluation of New Battery-less Wireless Traffic Sensors

Download or read book Enhancement and Field Test Evaluation of New Battery-less Wireless Traffic Sensors written by Sean Pruden and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This project focused on the enhancement of a previous battery-less wireless traffic flow sensor so as to enable it to provide weigh-in-motion (WIM) measurements and provide enhanced telemetry distance. The sensor consists of a 6-feet-long device which is embedded in a slot in the road flush with the pavement. As a vehicle travels over the sensor, vibrations are induced in the sensor. Using piezoelectric elements, energy is harvested from the vibrations and used to power the electronics in the sensor for signal measurements and wireless transmission. The sensor's performance was evaluated by embedding it in a slot in concrete pavement and driving various vehicles of known weight over it at a number of different speeds on different days.