A Capacitively-Fed Inverted-F Antenna for Displacement Detection in Structural Health Monitoring

Xue, Songtao; Zheng, Zhiquan; Guan, Shuai; Xie, Liyu; Wan, Guo Chun; Wan, Chunfeng

doi:10.3390/s20185310

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…A lot of antenna sensors have been developed, such as the deformation sensor, strain sensor, temperature sensor, humidity sensor, bolt loosening sensor, corrosion sensor, and so on [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental test of patch antenna sensor for simultaneous crack and temperature sensing

2023

Materials Research Proceedings

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Abstract. This paper presents a patch antenna sensor for simultaneous crack and temperature sensing, and its actual performance is tested. The patch antenna sensor consists of an off-center fed underlying patch and an overlapping sub-patch, which is tightly attached to the underlying patch and allowing the electric current to flow through the integrated patch. The off-center feeding of the patch antenna can activate the resonant modes in both transverse and longitudinal directions. The resonant frequency shift in transverse direction is utilized for temperature sensing, and the crack width can be sensed by the longitudinal resonant frequency shift. Furthermore, this unstressed structure of the patch antenna sensor can avoid the problems of incomplete strain transfer ratio and the insufficient bonding strength. In this paper, the theoretical relationships between the antenna resonant frequencies, the environment temperature, and the crack width were studied. Experimental tests were also conducted, the off-center fed patch antenna sensor was fabricated and several days of continuous monitoring were performed to test the sensing performance of the patch antenna sensor. The experimental results demonstrate the feasibility of the proposed patch antenna sensor for simultaneous crack and temperature sensing.

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“…A lot of antenna sensors have been developed, such as the deformation sensor, strain sensor, temperature sensor, humidity sensor, bolt loosening sensor, corrosion sensor, and so on [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental test of patch antenna sensor for simultaneous crack and temperature sensing

2023

Materials Research Proceedings

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show abstract

“…In addition, the antenna's electromagnetic waves can penetrate non-metal coverings, making antenna-based sensing technology better suited for structural health monitoring. Various antenna-based sensors have been proposed for many tasks, including strain sensing [18][19][20], crack sensing [21], displacement sensing [22][23][24], temperature sensing [25], humidity sensing [26], bolt loosening detection [27], and cement hydration setting time detection [28]. Some early antenna-based sensors only tracked the change of a single physical variable.…”

Section: Introductionmentioning

confidence: 99%

An off-center fed patch antenna with overlapping sub-patch for simultaneous crack and temperature sensing

Li¹,

Xue²,

Xie³

et al. 2022

Smart Mater. Struct.

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This paper presents an off-center fed patch antenna for simultaneous crack and temperature sensing. The antenna sensor consists of an off-center fed underlying patch and an overlapping sub-patch. The bottom copper sheet of the sub-patch is tightly attached to the underlying radiation patch allowing the electric current to flow through the integrated patch. The off-center feeding can activate the resonant modes in both transverse and longitudinal directions. The transverse resonant frequencies of the combined patch are utilized for temperature sensing. Therefore, the crack width sensed by the longitudinal frequency shift can be adjusted, eliminating the temperature effect. In addition, this unstressed structure of the combined patch can avoid the issues of incomplete strain transfer ratio and the insufficient bonding strength of a monolithic antenna. The authors developed theoretical relationships between the antenna resonant frequencies, the temperature, and the crack width. They also developed simulations of the off-center fed patch antenna sensor as well as a series of experimental tests to demonstrate the feasibility of the proposed sensor for simultaneous crack and temperature sensing.

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“…In order to judge the state of bolts more accurately, some new approaches are urgently needed to remedy this deficiency and even realize the quantitative judgment of the bolt status. Patch antenna-based sensors, which are commonly used for quantitative strain or crack monitoring in the field of structural health monitoring, have attracted our attention due to their advantages such as simple configuration, multimodality, and low cost [17,18].…”

Section: Introductionmentioning

confidence: 99%

An angle sensor based on a sector ring patch antenna for bolt loosening detection

Wan¹,

Zheng²,

Xue³

et al. 2022

Smart Mater. Struct.

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This paper presents an angle sensor based on a sector ring patch antenna (SRPA) for loose bolt detection. The sensor is comprised of two parts, a ring substrate sandwiched between a ground plane and a sector ring radiation patch, and a sector ring substrate covered by a radiation patch. The two radiation patches are partially overlapped and the overlapped areas are in contact allowing the electric current to flow within the combined radiation patch. The resonant cavity theory is adopted to explain the relationship between the frequency shift and the overlapped angle. The Ansoft high Frequency Structure Simulator (HFSS) software is used to simulate SRPA, and the dimensional parameters of the antenna are optimized to make the antenna perform better. For verification, two sets of SRPAs are fabricated and tested.

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A Capacitively-Fed Inverted-F Antenna for Displacement Detection in Structural Health Monitoring

Cited by 8 publications

References 44 publications

Experimental test of patch antenna sensor for simultaneous crack and temperature sensing

Experimental test of patch antenna sensor for simultaneous crack and temperature sensing

An off-center fed patch antenna with overlapping sub-patch for simultaneous crack and temperature sensing

An angle sensor based on a sector ring patch antenna for bolt loosening detection

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