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Development of Low Cost Piezoelectric Film WIM System
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1991-10-01
[PDF-1.13 MB]
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Edition:Final Report September 1990 November 1990
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Abstract:Truck weight data are required for pavement and bridge design, truck size and weight enforcement, and the development of administrative policy and legislation. The efficient collection and analysis of these data require that truck weighing-in-motion (WIM) equipment be used. Lower cost WIM systems are necessary for use in meeting the needs of national and state agencies. Several technologies have been investigated and used for lower cost WIM systems. Inexpensive, accurate, and reliable traffic sensors for weighing trucks, and detecting the presence of vehicles, as well as their axles, have been shown to be useful in previous research. One of these piezoelectric (piezo) cable, was investigated in a research effort jointly sponsored by the State of Iowa and Minnesota and Federal Highway Administration (FHW A) and in other work in the State of Washington and several European countries. A new piezo technology, which uses piezo film rather than the ceramic powder form employed in the piezo cable, was used in this study. This study was conducted to evaluate piezo film WIM sensor technologies, produce an electronic data collection unit, and integrate the different assemblies with appropriate software to produce a low cost piezoelectric film WIM system. This work has been successfully completed.
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