The Hong Kong Research Institute of Textiles and Apparel Limited

The Hong Kong Polytechnic University

Tao Hua

Xiaoming Tao

Qiao Li

Yangyong Wang

Jie Feng

Yee Kwan Chow

Bin Xu

Bingang Xu

Bo Zhu

Xiao Ming Tao

Heng Guo

Yunhui Jia

A process for manufacturing a fabric pressure sensor comprises cutting a sensing fabric to a pre-determined size, connecting a flexible electric wire with a wire of the sensing fabric by sewing, fixing the sensing fabric by means of a clamping positioner at a pre-determined tension, bonding a lower conversion layer with the sensing fabric by means of a lower conversion layer positioning box, bonding an adjustable column with the sensing fabric by means of an upper conversion layer positioning box, and bonding the upper conversion layer with the adjustable column by means of the upper conversion layer positioning box. A tool for manufacturing the sensor comprises an electrical property measuring device, a wire connecting tool, and a sensor structural component assembling tool. The present invention provides an easy and convenient way of manufacturing a fabric pressure sensor, monitoring the quality of manufacture, and enhancing the manufacturing precision and product yield.

Process for manufacturing fabric pressure sensor and tool for manufacturing fabric pressure sensor

Process for manufacturing fabric pressure sensor

A method and apparatus for imparting false twist to a short staple yarn delivered from a nip of a pair of front drafting rollers before ring spinning. Downstream of the nip, the twisted yarn is drawn sequentially across first and second runs of travelling endless belts, such that the yarn wraps about a first convex surface of the first run, then passes between the first and second runs, before wrapping about a second convex surface of the second run. Friction between each of the first and second convex surfaces and the yarn imparts the false twist in a common direction. Maintaining a differential between first and second linear speeds of the first and second runs, respectively, has been found to reduce yarn defects, particularly the nep count.

Method and apparatus for imparting false twist to yarn before ring spinning

Method and apparatus for reducing residual torque in singles ring yarns, achieved by imparting two separate false twisting points on the traveling strand of fibers (or yarn) after the strand exits from the spinning triangle with a proper ratio between the belt speed and the strand feeding speed. In addition to reducing the residual torque, this double false twist technique also reduces yarn hairiness to the same level as achieved by more expensive compact spinning devices, reduces yarn twist by more than 20% and significantly enhances yarn and fabric softness. Furthermore, by combining the double false twist technique with a compact spinning device, the numbers of neps, thick and thin places are significantly reduced to produce high-quality yarns and fine-count yarns.

Method and apparatus for reducing residual torque and neps in singles ring yarns

A pressure sensing device includes a first conversion layer and a second conversion layer, an electrically conductive element between the first and second conversion layers, and a pair of electrically conductive yarns connected to the electrically conductive element, wherein the first and second conversion layers include at least one deformation member adapted to deform the electrically conductive element and change the resistivity of the electrically conductive element, when pressure exerts on the first and/or the second conversion layer.

Soft pressure sensing device

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Hong Kong, China

Tao Hua