Connecting to concrete: wireless monitoring of chloride ions in concrete structures

Yawar Abbas; Bas ten Have; Gerrit I. Hoekstra; Arjan Douma; Douwe de Bruijn; Wouter Olthuis; Albert van den Berg

doi:10.1016/j.proeng.2015.08.827

Connecting to concrete: wireless monitoring of chloride ions in concrete structures

Yawar Abbas, Bas ten Have, Gerrit I. Hoekstra, Arjan Douma, Douwe de Bruijn, Wouter Olthuis, Albert van den Berg

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

4 Citations (Scopus)

Abstract

For the first time, chloride ions are measured wirelessly in concrete. The half-cell potential of a silver/silver chloride (Ag/AgCl) electrode, which corresponds to the concentration of chloride ions, is measured wirelessly. The sensor system (the Ag/AgCl and a reference electrode) is embedded in concrete, and a hand-held readout device is used. Wireless communication is achieved by an inductive coupling (reflected-impedance) between the coils of the sensor and the readout. The resonance frequency of the sensor coil changes due to the change in the capacitance of a varactor element connected to Ag/AgCl electrode system. The capacitance of the varactor increases with the increase in chloride ion concentration (20 pF/decade). Furthermore, the capacitance can be reliability measured up to a distance of 35 mm between sensor and readout coil. No battery is needed to power the sensor terminal, which makes it feasible to embed it in concrete structures

Original language	Undefined
Title of host publication	Eurosensors 2015
Publisher	Elsevier
Pages	965-968
Number of pages	4
DOIs	https://doi.org/10.1016/j.proeng.2015.08.827
Publication status	Published - 2015
Event	Eurosensors XXIX 2015 - Freiburg, Germany Duration: 6 Sep 2015 → 9 Sep 2015

Publication series

Name	Eurosensors
Publisher	Elsevier Ltd
Volume	120
ISSN (Print)	1877-7058
ISSN (Electronic)	1877-7058

Conference

Conference	Eurosensors XXIX 2015
Country	Germany
City	Freiburg
Period	6/09/15 → 9/09/15

Keywords

EWI-26725
IR-99202
METIS-315544

Access to Document

10.1016/j.proeng.2015.08.827

http://eprints.eemcs.utwente.nl/secure2/26725/01/Connecting-to-concrete-Wireless-monitoring-of-chloride-ions-in-concrete-structures_2015_Procedia-Engineering.pdf

Cite this

Abbas, Y., ten Have, B., Hoekstra, G. I., Douma, A., de Bruijn, D., Olthuis, W., & van den Berg, A. (2015). Connecting to concrete: wireless monitoring of chloride ions in concrete structures. In Eurosensors 2015 (pp. 965-968). (Eurosensors; Vol. 120). Elsevier. https://doi.org/10.1016/j.proeng.2015.08.827

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title = "Connecting to concrete: wireless monitoring of chloride ions in concrete structures",

abstract = "For the first time, chloride ions are measured wirelessly in concrete. The half-cell potential of a silver/silver chloride (Ag/AgCl) electrode, which corresponds to the concentration of chloride ions, is measured wirelessly. The sensor system (the Ag/AgCl and a reference electrode) is embedded in concrete, and a hand-held readout device is used. Wireless communication is achieved by an inductive coupling (reflected-impedance) between the coils of the sensor and the readout. The resonance frequency of the sensor coil changes due to the change in the capacitance of a varactor element connected to Ag/AgCl electrode system. The capacitance of the varactor increases with the increase in chloride ion concentration (20 pF/decade). Furthermore, the capacitance can be reliability measured up to a distance of 35 mm between sensor and readout coil. No battery is needed to power the sensor terminal, which makes it feasible to embed it in concrete structures",

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Connecting to concrete: wireless monitoring of chloride ions in concrete structures. / Abbas, Yawar; ten Have, Bas; Hoekstra, Gerrit I.; Douma, Arjan; de Bruijn, Douwe; Olthuis, Wouter ; van den Berg, Albert.

Eurosensors 2015. Elsevier, 2015. p. 965-968 (Eurosensors; Vol. 120).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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