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Proceedings Paper

Wireless monitoring of highways
Author(s): Richard Bennett; Barrie Hayes-Gill; John A. Crowe; Robert Armitage; Dale Rodgers; Adrian Hendroff
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Paper Abstract

Electronic hardware has been developed to telemetrically transmit temperature and strain measurements from within a public highway in the UK. These measurements provide an important health check for monitoring fatigue damage in pavements. Previous attempts at measuring strain and temperature have required lengths of cable to be installed in the highway. The installation of these cables is both expensive and damaging to the pavement and provides potentially unreliable electrical connections. The new systems consist of a retrofitted instrumented asphalt core which is bonded into the pavement structure. The core contains all the electronics necessary to record two temperatures and two strains. An analogue front end provides signal conditioning which is digitized and passed to microcontroller for endcoding. From there the data is transmitted via a low power radio link to a receiver and data logger positioned by the side of the road. The system has an in-situ operating life of 6 months on AA alkaline batteries. Results are presented of power management and fault tolerant radio protocol techniques, long term temperature variations, dynamic strain measurements within the highway, and RF transmission capabilities through a layer of asphalt.

Paper Details

Date Published: 18 May 1999
PDF: 10 pages
Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); doi: 10.1117/12.348667
Show Author Affiliations
Richard Bennett, Scott Wilson Pavement Engineering (United Kingdom)
Barrie Hayes-Gill, Univ. of Nottingham (United Kingdom)
John A. Crowe, Univ. of Nottingham (United Kingdom)
Robert Armitage, Scott Wilson Pavement Engineering (United Kingdom)
Dale Rodgers, Univ. of Nottingham (United Kingdom)
Adrian Hendroff, Univ. of Nottingham (United Kingdom)

Published in SPIE Proceedings Vol. 3671:
Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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