Study of Wearables with Embedded Electronics Through Experiments and Simulations

Chow, Justin; Sitaraman, Suresh K.; May, Christopher; May, Joseph W.

doi:10.1109/ectc.2018.00126

Cited by 19 publications

(10 citation statements)

References 12 publications

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“…The strain resistance signal generated by a single exercise is of little significance for professional exercise guidance, but the analysis of multiple exercise signals is very important for exercise guidance. Based on this, Chow et al [38] prepared a textile pressure sensing monitoring sock using conductive yarn to connect the communication module at the ankle joint and observe the wearer's foot movement according to the strain image.…”

Section: Professional Sports Guidancementioning

confidence: 99%

Research progress of knitted sensors in the field of sports and fitness apparel

Ma¹,

Liu²,

Niu³

et al. 2022

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<p>Knitted sensor has the advantages of lightness, conformity, good strain tensile recovery and formability, which provides a possibility for flexible and non-inductive motion signal monitoring and smart wearable sports health clothing preparation. This paper reviews the preparation methods of knitted sensors, analyzes the influence of yarn types, fabric microstructure and tensile sensing direction on its sensing performance, and compares the advantages and disadvantages of knitted sensors in the fields of life and health, human movement and other fields. It is pointed out that the type, structure and weaving method of the conductive yarn are important factors affecting the performance and wearing comfort of knitted sensors, and the electrical characteristics of the two-dimensional extension and three-dimensional deformation in the strain stretching process of knitted sensors determine the effective strain sensing range. This paper outlines the development opportunities and challenges faced by knitted sensors in the field of sports and health clothing.</p>

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Section: Professional Sports Guidancementioning

confidence: 99%

Research progress of knitted sensors in the field of sports and fitness apparel

Ma¹,

Liu²,

Niu³

et al. 2022

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“…Figure 4 -FHE would experience different types of deformation when in application of (a) the vehicle sensor, (b) the foldable display, and (c) the wearable electronics [54]. (c) twisting test [57].…”

Section: List Of Figuresmentioning

confidence: 99%

“…During usage, flexible printed electronics would undergo different types of deformation. Figure 4 shows several applications of flexible electronics and relevant types of deformation during usage [52][53][54]. A sensor would be uniaxially or biaxially bent to conform onto the vehicle's body, as shown in Figure 4(a).…”

Section: Mechanical Testing Of Flexible Printed Electronicsmentioning

confidence: 99%

Mechanical and High-Frequency Electrical Study of Printed, Flexible Antenna Under Deformation

Zhou

Sivapurapu

Swaminathan

et al. 2020

IEEE Trans. Compon., Packag. Manufact. Technol.

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The meaningful discussions we shared on research work and life have indeed made my experience in graduate school more than enjoyable. In addition, I would like to thank other professionals and students who are involved in my research including Dr. Jim Huang from Hewlett Packard Enterprise as well as Sridhar Sivapurapu and Nahid Aslani Amoli from Dr. Swaminathan's group. Many thanks are due to my parents who always stood behind every critical decision I made. I would not have accomplished this milestone without their love, support, and trust. I would like to acknowledge that this material is based, in part, on research sponsored by Air Force Research Laboratory under agreement number FA8650-15-2-5401, as conducted through the flexible hybrid electronics manufacturing innovation institute, NextFlex. ivTABLE OF CONTENTS ACKNOWLEDGEMENTS iii LIST OF TABLES vi LIST OF FIGURES vii LIST OF SYMBOLS AND ABBREVIATIONS xiv SUMMARY xvi CHAPTER 1. INTRODUCTION CHAPTER 2. BACKGROUND AND LINTERATURE REVIEW 2.1 History of Conformal Antenna and Flexible Printed Antenna 2.2 Mechanical Testing of Flexible Printed Electronics 2.3 Antenna Performance Under Strain CHAPTER 3. OBJECTIVES AND SCOPE CHAPTER 4. ANTENNA DESIGN AND FABRICATION RESULTS 4.1 Fabrication Process 4.2 Antenna Design in HFSS 4.2.1 Layer Thickness 4.2.2 Material Electrical Properties 4.2.3 HFSS Simulation Setup and Results 4.3 Fabrication Results and Comparison to Simulation CHAPTER 5. MANDREL BENDING TEST AND RESULTS 5.1 Mandrel Bending Test Over Different Sizes of Mandrel 5.1.1 Experimental Setup and Procedure 5.1.2 Experimental Test Results 5.2 Cyclic Mandrel Bending Test over Mandrel Size of 0.625 in. Radius 5.2.1 Experimental Procedure and Results of Sample P1 5.2.2 Experimental Procedure and Results of Sample P2 CHAPTER 6. MECHANICAL FINITE-ELEMENT ANALYSIS OF MANDREL BENDING TEST 6.1 Geometry Modeling 6.2 Material Modeling 6.2.1 Characterization of Printed Silver Ink's Property 6.2.2 Other Materials' Properties 6.3 Loading and Boundary Conditions v 6.4 Initial Meshing Details 6.5 Mesh Convergence and Simulation Results CHAPTER 7. BIAXIAL BENDING TEST AND RESULTS 7.1 Experimental Fixture Design and Setup 7.2 Experimental High-Frequency Measurement Results 7.3 SEM Images Results CHAPTER 8. MECHANICAL FINITE-ELEMENT ANALYSIS OF THE BIAXIAL BENDING TEST 8.1 Loading and Boundary Conditions 8.2 Mesh Convergence and Simulation Results CHAPTER 9. Conductivity Change Impact on Patch Antenna's High-Frequency Electrical Behavior 9.1 Updated HFSS Model 9.2 Conductivity Impact on the S11 Response CHAPTER 10. Conclusion, Contributions, and Future Work 10.1 Conclusion 10.2 Contributions 10.3 Future Work REFERENCES CHAPTER 1.

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“…21 Chow et al presented the intelligent fitness socks that use textile pressure sensors, which are attached to a communication wristband via a conductive yarn. 22 In the literature, wearable technologies were applied in a limited area. Thermophysiological comfort parameters were ignored, could not be applied to every piece of clothing and had a portable battery problem.…”

Section: Introductionmentioning

confidence: 99%

Development of upholstery electro-fabric for smart textile applications

Coskun

Öner

2021

Journal of Industrial Textiles

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Smart textile products developed by evaluating the human body’s data through sensors have become widespread in recent years. The majority of these products include textile-based information and communication technologies that integrate electronic components into clothing. People use seats, chairs, armchairs, etc., to sit constantly in vehicles, work or at home. The use of these items varies according to the requirements and purposes. In this study, an electro-textile-based upholstery fabric design was carried out to be used in sitting furniture. Electronic components containing capacitive sensors were placed in the designed fabric structure to make it usable in different areas where upholstery fabrics are used. In addition, the sensor connection circuit was developed to receive data from the fabric surface. The data taken from the fabric surface were made meaningful using the calibration and normalization algorithm. The 3D pressing map of the reaction on the fabric surface for different sitting positions was drawn. Electromagnetic field and vibration tests were carried out to examine the response behaviour in different environments where the fabric can be used. According to the findings, it was observed that the pressing areas formed on the surface were displayed in a significant way over the 3D pressing map, and the system was not affected by the electromagnetic field and vibrations. Besides, the fabric was applied on the various surfaces to test calibration and threshold algorithm. Obtained results and circumstances showed that the designed calibration and threshold algorithm were successful to obtained significant results. As a result of the study, upholstery electro fabric with a response time of 0.01 seconds in data collection was developed, which can be used in different environments such as home, workplace and vehicle. It can be used over furniture and in wet and dry conditions and is not affected by the electromagnetic field and vibration in the environment.

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Study of Wearables with Embedded Electronics Through Experiments and Simulations

Cited by 19 publications

References 12 publications

Research progress of knitted sensors in the field of sports and fitness apparel

Research progress of knitted sensors in the field of sports and fitness apparel

Mechanical and High-Frequency Electrical Study of Printed, Flexible Antenna Under Deformation

Development of upholstery electro-fabric for smart textile applications

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