The need for a permanent an unobtrusive axle sensor for vehicle detection and classification has long been recognised.Both triboelectric and piezoelectric cables are candidates for in- ground operation.Field tests of the triboelectric cable sensor have already indicated that, if properly interfaced. It is suitable for above- ground use. The operating characteristics of the piezoelectric cable sensor are relatively unknown and depend on how it is installed. This paper describes several mounting configurations for both cable sensors.
Abstract