scholarly journals Characterization of low-cost inkjet printed-photonic cured strain gauges for remote sensing and structural monitoring applications

2021 ◽  
Author(s):  
Juho Kerminen ◽  
◽  
Jenny Wiklund ◽  
Alp Karakoç ◽  
Kalle Ruttik ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Low Cost ◽  
Structural Monitoring ◽  
Strain Gauges ◽  
Monitoring Applications

scholarly journals Characterization of Low-Cost Inkjet Printed-Photonic Cured Strain Gauges for Remote Sensing and Structural Monitoring Applications

2021 ◽  
Author(s):  
Juho Kerminen ◽  
Jenny Wiklund ◽  
Alp Karakoç ◽  
Kalle Ruttik ◽  
Riku Jäntti ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Low Cost ◽  
Effective Strain ◽  
Cost Effective ◽  
Structural Monitoring ◽  
Strain Gauges ◽  
Gauge Factor ◽  
Ohmic Resistance ◽  
Monitoring Applications ◽  
Potential Applications

In the present work, cost-effective strain gauges were fabricated by using inkjet printing and photonic curing on flexible and recyclable PET substrates. Ohmic resistance (a.k.a. DC resistance) (R0) and complex electrical impedance (Z) as a function of test frequency were characterized, respectively, with the state-of-the-art electronic testing equipments. For the fabrication process, commercially available silver nanoparticle (AgNP) inks and printing substrates were used in order to eliminate any apriori ink processing. In order to validate the in-house cantilever beam measurement setup and devices, first, commercially available metallic foil strain gauges (with the provided gauge factor GF=2 by the manufacturer) were tested at different locations. Thereafter, the printed strain gauges were investigated with several repetitions at different measurement locations. The measurement results demonstrated an affordable, rapid and tailorable design and repeatable fabrication approach for strain gauges with GFavg~6.6, which has potential applications in remote sensing and structural monitoring applications.

scholarly journals Performance Assessment of Low-Cost Thermal Cameras for Medical Applications

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1321 ◽  
Author(s):  
Enrique Villa ◽  
Natalia Arteaga-Marrero ◽  
Juan Ruiz-Alzola
Keyword(s):  
Low Cost ◽  
Home Monitoring ◽  
Medical Applications ◽  
Competitive Advantages ◽  
Monitoring Applications ◽  
Thermal Cameras ◽  
Recent Developments ◽  
Controlled Environments ◽  
Noise Equivalent Temperature Difference

Thermal imaging is a promising technology in the medical field. Recent developments in low-cost infrared (IR) sensors, compatible with smartphones, provide competitive advantages for home-monitoring applications. However, these sensors present reduced capabilities compared to more expensive high-end devices. In this work, the characterization of thermal cameras is described and carried out. This characterization includes non-uniformity (NU) effects and correction as well as the thermal cameras’ dependence on room temperature, noise-equivalent temperature difference (NETD), and response curve stability with temperature. Results show that low-cost thermal cameras offer good performance, especially when used in temperature-controlled environments, providing evidence of the suitability of such sensors for medical applications, particularly in the assessment of diabetic foot ulcers on which we focused this study.

Fiber optic sensors for characterization of composite structural materials and structural monitoring

1997 ◽  
Author(s):  
Robert P. Kenny ◽  
E. Gutierrez ◽  
Alfredo C. Lucia ◽  
Maurice P. Whelan ◽  
F. Gaiazzi
Keyword(s):  
Fiber Optic ◽  
Structural Materials ◽  
Fiber Optic Sensors ◽  
Structural Monitoring

scholarly journals Microstructure and Thermoelectric Properties of (Bi0.48Sb1.52)Te3 Thick Films Prepared with Tape Casting Method

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 140
Author(s):  
Lichen Liu ◽  
Ziping Cao ◽  
Min Chen ◽  
Jun Jiang
Keyword(s):  
Thermoelectric Properties ◽  
Low Cost ◽  
Thick Films ◽  
Tape Casting ◽  
Casting Process ◽  
Casting Method ◽  
Glass Substrates ◽  
Conductive Films ◽  
Casting Technology

This paper reports the fabrication and characterization of (Bi0.48Sb1.52)Te3 thick films using a tape casting process on glass substrates. A slurry of thermoelectric (Bi0.48Sb1.52)Te3 was developed and cured thick films were annealed in a vacuum chamber at 500–600 °C. The microstructure of these films was analyzed, and the Seebeck coefficient and electric conductivity were tested. It was found that the subsequent annealing process must be carefully designed to achieve good thermoelectric properties of these samples. Conductive films were obtained after annealing and led to acceptable thermoelectric performance. While the properties of these initial materials are not at the level of bulk materials, this work demonstrates that the low-cost tape casting technology is promising for fabricating thermoelectric modules for energy conversion.

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