Additive manufacturing of flexible nanocomposite SAW sensor for strain detection

Govindarajan, Rishikesh Srinivasaraghavan; Xu, Xin; Sikulskyi, Stanislav; Madiyar, Foram; Rojas-Nastrucci, Eduardo A.; Kim, Daewon

doi:10.1117/12.2582864

Cited by 4 publications

(3 citation statements)

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“…Finite element modeling allows appropriate optimization of sensor performance with added microstructures conveniently before fabrication, which can be validated using experimental results. In this work, PVDF substrate with added microstructure shapes is simulated numerically using a COMSOL Multiphysics tool 18,19 . All the required mechanical and piezoelectric material properties related to the physics used for substrate (PVDF), electrode (gold), and microstructures (acrylic plastic -material similar to Nanoscribe IP-S resin printed during the experiment) are assigned to respective designed domains, as listed in Table 2.…”

Section: Numerical Analysis Of Saw With Microstructures 21 Microstruc...mentioning

confidence: 99%

“…The conventional methods for fabrication of microstructures in the sensing layer, such as photo structuring, etching, and molding [14][15][16] , are a monotonous multi-step process that lacks resolution and requires immense processing time. Additive manufacturing (AM) technology has advanced to the point where micro-and nano-scale structures fabrication is feasible with minimized material utilization and reduced mass production costs 17,18 . This research is geared towards a novel sensor *kimd3c@erau.edu; phone development with microstructure printed directly to the piezoelectric substrate using the two-photon polymerization (2PP) principle.…”

Section: Introductionmentioning

confidence: 99%

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On the performance of PVDF based piezoelectric sensor with microstructures

Govindarajan¹,

Stark²,

Madiyar³

et al. 2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

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This paper aims to investigate the performance of piezoelectric sensors with different shapes of 3D-printed microstructures. Based on the numerical analysis in the time-frequency domain, the microstructures are printed directly on the PVDF transparent film exhibiting higher piezoelectric coefficients using a high-resolution two-photon polymerization method. Bi-directional gold IDTs are fabricated by sputtering gold onto the substrate surface using a 3D-printed stencil. The mechanical properties of the film and surface morphology of printed microstructures are examined using a nanoindenter and a 3D profilometer. The change in frequency response due to the microstructure is measured using a network analyzer. This study will be a reference for developing an efficient wave-based gas sensor with enhanced sensitivity.

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Section: Numerical Analysis Of Saw With Microstructures 21 Microstruc...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the performance of PVDF based piezoelectric sensor with microstructures

Govindarajan¹,

Stark²,

Madiyar³

et al. 2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

View full text Add to dashboard Cite

show abstract

“…Input IDT Output IDT devices, considers mechanical, electrical, and piezoelectric properties with two physics: solid mechanics and electrostatics 15 . The material properties of substrate and electrodes made of PVDF and silver are assigned to respective domains.…”

Section: Piezoelectric Substratementioning

confidence: 99%

Wave-based sensor responses with embedded electrode layouts

Govindarajan¹,

Madiyar²,

Kim³

2023

Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2023

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Acoustic wave-based devices have attracted greater attention, particularly in the aerospace and bio-medical fields due to their passive and wireless capabilities. Interdigital transducer (IDT) is an integral part of the SHM wave-based sensor, as it transmits information about the structural state. Additionally, embedding the electrodes inside the piezoelectric substrate increases the acoustic coupling and protects the electrodes from potential external damage. This paper uses numerical analysis to discuss sensor responses with different IDT layouts in both frequency and time domains. The results investigate each type's sensitivity towards mechanical strains and figure of merit, which facilitates the development of an efficient embedded electrode sensor through advanced additive manufacturing techniques.

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A Novel 4-Bit U-Shaped Chipless Flexible Substrate RFID Sensor Sensing Characterization Study

Xie,

Hu,

Yang

et al. 2023

IEEE Access

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The technical method of strain detection by radio frequency identification (RFID) technology has the characteristics of flexibility, low cost and high intelligence. The traditional planar-based rigid sensing antennas are basically made of rigid substrates, which have the disadvantages of poor surface fit and flexibility, so flexible electronics are gradually applied in the field of structural health monitoring (SHM) to solve the challenge of nonplanar deformation monitoring. In this paper, we propose a flexible reconfigurable strain-gauge RFID sensor with an encoding capability of 4 bits. The encoding structure is based on a coupled U-shaped resonator with strain resonance in the UHF RFID frequency band from 0-4 GHz. Reconfigurability is achieved by introducing a diode with modulated bandstop filtering in the resonator. The proposed antenna uses an FPCB board with total dimensions of 100 mm × 71.4 mm × 0.508 mm. It is subjected to thermal stability experiments, four-point bending strain and strain monitoring inside concrete, and the simulation and measurement results verify the feasibility of the design. This is important for realizing high-performance integrated strain monitoring in structural health monitoring using RFID technology.INDEX TERMS Radio frequency identification (RFID), flexible, strain sensor, reconfigurable antenna

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Additive manufacturing of flexible nanocomposite SAW sensor for strain detection

Cited by 4 publications

References 0 publications

On the performance of PVDF based piezoelectric sensor with microstructures

On the performance of PVDF based piezoelectric sensor with microstructures

Wave-based sensor responses with embedded electrode layouts

A Novel 4-Bit U-Shaped Chipless Flexible Substrate RFID Sensor Sensing Characterization Study

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