A new implementation of a wearable respiratory inductive plethysmography garment is obtained by knitting a 250 μm thin insulted Cu wire simultaneously with yarn in the round. This was used to integrate a knitted coil in the body of a baby romper suit. During simulated breathing the diameter of knitted coil changes by stretching the knit circularly, causing a variation of the self-inductance of the coil. Coils with 5 rows of integrated metal wire with different stitch types and patterns were investigated to determine their influence on inductance, series resistance and sensitivity. We observed that knit styles that reduce the resistance of the coil, such as lace and jacquard also reduce the inductance and flexibility of the garment. Jacquard with three colours and one metal wire for each colour, gave the highest coil quality factor but also the poorest flexibility. We found that 1/1 rib stitch has the highest self-inductance for all yarn types. Its sensitivity of 0.5 – 0.6 μH/cm is similar to stockinette stitch except when elastic viscose yarn is used. Coils in stockinette stitch and elastic viscose yarn have the highest sensitivity of 0.84 μH/cm. No hysteresis in self-inductance was observed for circumference variations between 44 and 53 cm of the body of the baby romper in 1/1 rib stitch due to the elasticity of knitted garments.

一种新的可穿戴式呼吸感应体积描记术服装的实现是通过同时编织一条250μm的薄铜线和一圈纱线而获得的。它用于将针织线圈集成到婴儿背带裤的身上。在模拟呼吸期间，编织线圈的直径会通过圆形拉伸编织而变化，从而导致线圈的自感发生变化。研究了5排具有不同线迹类型和样式的集成金属线的线圈，以确定它们对电感，串联电阻和灵敏度的影响。我们观察到，降低线圈电阻的编织样式（例如花边和提花）也降低了服装的电感和柔韧性。提花有三种颜色，每种颜色有一根金属丝，线圈品质因数最高，柔韧性也最差。我们发现1/1罗纹针迹在所有类型的纱线中具有最高的自感。其灵敏度为0.5 – 0.6μH/ cm，除了使用弹性粘胶纱线外，其与纱网针迹相似。细纱针迹线圈和弹性粘胶纱线中的线圈的最高灵敏度为0.84μH/ cm。由于针织服装的弹性，在1/1罗纹针脚处的婴儿背带身长在44至53厘米之间的圆周变化，未观察到自感的滞后现象。