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Vol. 14-1, Special Issue, March 2012, pp.112-121




Experimental Validation of a Sensor Monitoring Ice Formation over a Road Surface



Dipartimento di Elettronica of Politecnico di Torino,

Corso Duca degli Abruzzi 24, Torino, 10129, Italy

Tel.: +39 011 5644103, fax: +39 011 5644103

E-mail: amedeo.troiano@polito.it, eros.pasero@polito.it, luca.mesin@polito.it



Received: 23 November 2011   /Accepted: 20 December 2011   /Published: 12 March 2012

Digital Sensors and Sensor Sysstems


Abstract: The reliable detection of ice over road surfaces is an important issue for reducing maintenance costs and improving traffic safety. An innovative capacitive sensor was developed to detect the presence of ice on its surface, and its repeatability, stability and reliability were assessed in simulations and experiments described in previous papers. The indications of the sensor are compared in this paper with the objective identification of ice formation or melting over a road surface in laboratory, under dynamic or stationary conditions, using tap water or a solution with 5 % of salt concentration. The sensor provides indications which are in line with the condition of the road surface, with a mean error in the identification of the time instants of ice-wet and wet-ice transitions lower than about 10 and 40 minutes in the case of tap water and salt water, respectively, both under different temperature gradients or in stationary conditions. Moreover, the indication provided by the sensor always anticipates the formation of ice over the road surface.


Keywords: Ice detection, Road information system, Road pavement condition


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