Magnetic coupling with 3D knitted helical coils

Fobelets, Kristel; Sareen, K.S.; Thielemans, Kris

doi:10.1016/j.sna.2021.113213

Cited by 5 publications

(3 citation statements)

References 23 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This variation in response shows that the way in which the metal wires overlap between neighboring stitches in the wale direction has an important influence. Stretching the coil not only changes its diameter but also forces the legs of the stitches to reposition [17] causing changes in inductance [18].…”

Section: Fig 3 Schematic Drawings Of the Stitch Patterns Used In This Workmentioning

confidence: 99%

“…( 3)), column 2 shows that the current drawn by the circuit is lower for a higher number of windings and thus is preferable for longer battery lifetime. Increasing N decreases the current drawn from the batteries because the quality factor of the coil increases as a function of N 0.3 [18]. Microcontroller and counter draw additional current from the battery.…”

Section: Analysis Of Performancementioning

confidence: 99%

See 1 more Smart Citation

Low Power Respiration Monitoring Using Wearable 3D Knitted Helical Coils

et al. 2022

Self Cite

View full text Add to dashboard Cite

We demonstrate a novel low power inductive wearable plethysmography system. This consists of ultrasensitive 3D knitted helical coils integrated in a garment and an oscillator circuit with high quality factor. The low power oscillator is built using two cross coupled FET pairs with low capacitance drawing only 95 A during operation and with a response time smaller than 10 s. The sensor system is linear, with negligible hysteresis. The best compromise in sensitivity and power consumption is obtained with a 3D knitted helical coil using jersey knit with elastic yarn, a lower knitting needle size than recommended for the yarn and minimizing both the number of stitches per winding as well as the stitches containing metal. A sensitivity of 2.7 kHz per mm change in circumference with a power consumption of 6.85 mW per 30 ms measurement time is reported. This system can be used for long term breathing monitoring using a garment indistinguishable from everyday clothing.

show abstract

Section: Fig 3 Schematic Drawings Of the Stitch Patterns Used In This Workmentioning

confidence: 99%

Section: Analysis Of Performancementioning

confidence: 99%

Low Power Respiration Monitoring Using Wearable 3D Knitted Helical Coils

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Inductive sensors can be used in a variety of environments, one of which is non-contact body sensing networks. Application areas include respiration monitoring [1], ambulatory monitoring [2] and wireless power transfer [3]. Sensors require not only appropriate sensing characteristics but also readout electronics to transform the signal into practical data for further processing.…”

Section: Introductionmentioning

confidence: 99%