A Wireless Passive Sensing System for Displacement/Strain Measurement in Reinforced Concrete Members

Ozbey, Burak
DEMİR, Hilmi Volkan
Kurç, Özgür
In this study, we show a wireless passive sensing system embedded in a reinforced concrete member successfully being employed for the measurement of relative displacement and strain in a simply supported beam experiment. The system utilizes electromagnetic coupling between the transceiver antenna located outside the beam, and the sensing probes placed on the reinforcing bar (rebar) surface inside the beam. The probes were designed in the form of a nested split-ring resonator, a metamaterial-based structure chosen for its compact size and high sensitivity/resolution, which is at mu m/microstrains level. Experiments were performed in both the elastic and plastic deformation cases of steel rebars, and the sensing system was demonstrated to acquire telemetric data in both cases. The wireless measurement results from multiple probes are compared with the data obtained from the strain gages, and an excellent agreement is observed. A discrete time measurement where the system records data at different force levels is also shown. Practical issues regarding the placement of the sensors and accurate recording of data are discussed. The proposed sensing technology is demonstrated to be a good candidate for wireless structural health monitoring (SHM) of reinforced concrete members by its high sensitivity and wide dynamic range.


A Wireless Metamaterial-Inspired Passive Rotation Sensor With Submilliradian Resolution
Gargari, Ali Maleki; Ozbey, Burak; DEMİR, Hilmi Volkan; ALTINTAŞ, AYHAN; Albostan, Utku; Kurç, Özgür; ERTÜRK, VAKUR BEHÇET (2018-06-01)
A novel passive wireless rotation sensing system with high levels of sensitivity and resolution is proposed and demonstrated for measuring elastic-region bending in materials such as steel. This system is composed of a transceiver antenna and a double-plate sensor in the form of an inter-digital configuration, which does not incorporate any active component. The sensor exhibits a large rotation resolution of 20 mu-rad, an excellent sensitivity of 28 MHz/degrees in average, and a large linear dynamic range o...
An Electromagnetic Sensing System Incorporating Multiple Probes and Single Antenna for Wireless Structural Health Monitoring
Ozbey, Burak; ALTINTAŞ, AYHAN; DEMİR, Hilmi Volkan; ERTÜRK, VAKUR BEHÇET; Kurç, Özgür (2017-03-24)
In this study, a wireless and passive displacement/strain sensing system is proposed for structural health monitoring (SHM). The wireless and passive interrogation of the sensing unit [a variant of a nested split-ring resonator (NSRR)] is achieved through the near-field interaction and electromagnetic coupling between the single antenna in the system and the multiple sensors called the NSRR probes. It is demonstrated that the system can acquire data from more than one NSRR probe simultaneously in a real-lif...
Gokce, Furkan; Aydın, Eren; Kangül, Mustafa; Toral, Taylan B.; Zorlu, Ozge; Sardan-Sukas, Ozlem; Külah, Haluk (2017-06-22)
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A laterally resonating gravimetric sensor with uniform mass sensitivity and high linearity
Eroglu, D.; Bayraktar, E.; Külah, Haluk (2011-09-01)
In this paper, a laterally resonating gravimetric sensor with high linearity and uniform mass sensitivity is presented for biochemical sensor applications including rare-cell detection. The sensor utilizes symmetrically placed, balanced, folded spring beam structures to ensure lateral motion of the proof mass and limit the displacement difference between the proof mass center and edges. The dynamic mass sensitivity range of the resonator is increased by using the above mentioned properties of the resonators...
A dual modality system for high resolution-true conductivity imaging
Eyüboğlu, Behçet Murat; İder, Yusuf Ziya (2001-06-01)
In this study, a dual modality imaging system which utilises the magnetic flux density measurements, acquired using Magnetic Resonance Current Density Imaging (MRCDI) techniques, and the surface potential measurements, obtained from conventional Electrical Impedance Tomography (EIT) techniques, to reconstruct high resolution absolute conductivity images. An iterative algorithm is developed to minimise the difference between the current densities calculated based on the potential and the magnetic field measu...
Citation Formats
B. Ozbey, V. B. ERTÜRK, H. V. DEMİR, A. ALTINTAŞ, and Ö. Kurç, “A Wireless Passive Sensing System for Displacement/Strain Measurement in Reinforced Concrete Members,” SENSORS, pp. 0–0, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42277.