Easy-to-Build Textile Pressure Sensor

Abstract

This article presents the design, construction, and evaluation of an easy-to-build textile pressure resistive sensor created from low-cost conventional anti-static sheets and conductive woven fabrics. The sensor can be built quickly using standard household tools, and its thinness makes it especially suitable for wearable applications. Five sensors constructed under such conditions were evaluated, presenting a stable and linear characteristic in the range 1 to 70 kPa. The linear response was modeled and fitted for each sensor individually for comparison purposes, confirming a low variability due to the simple manufacturing process. Besides, the recovery times of the sensors were measured for pressures in the linear range, observing, for example, an average time of 1 s between the moment in which a pressure of 8 kPa was no longer applied, and the resistance variation at the 90% of its nominal value. Finally, we evaluated the proposed sensor design on a classroom application consisting of a smart glove that measured the pressure applied by each finger. From the evaluated characteristics, we concluded that the proposed design is suitable for didactic, healthcare and lifestyle applications in which the sensing of pressure variations, e.g., for activity assessment, is more valuable than accurate pressure sensing.

Single-Layer Pressure Textile Sensors with Woven Conductive Yarn Circuit

“…However, this method will also change the sensitivity of the sensors, so more experiments are needed in future work. In a comparison overview (Figure 8b), our sensors were found to be thinner than those of other studies [33−38], though they were a little bit thicker than those of [29] because of the laminating layers. A thin sensor will fit many wearable devices.…”

“…For example, Atalay et al [28] proposed the sensitive capacitive pressure sensor based on conductive fabrics and a microporous-dielectric layer. Pizarro et al [29] presented an easy method to create a textile pressure sensor. Jeong et al [30] studied a multilayer fabric pressure sensor for the real-time piezo-impedance imaging of pressure distribution.…”

The Effect of Position Time on the Formation of Pressure Ulcer in Bedridden Patients

“…Bu sensörler, kapasitif basınç değişimini ölçen sensörlerdir. [11][12][13] Uzun süre yatan hastalarda basınç yarası oluşumunun önlenmesi, hemşirelerin mesleki temel sorumlulukları arasında yer almaktadır. Basınç yarası oluşumuna hemşirelik bakımının yanı sıra hastaya pozisyon verebilen akıllı tekstillerin kullanımının da bakım kalitesini yükseltebilecek ve yara oluşumunu engelleyecek önemli bir potansiyele sahip olduğu düşünülmektedir.…”

Piezo-Sensitive Fabrics from Carbon Black Containing Conductive Cellulose Fibres for Flexible Pressure Sensors

“…A number of principles have been reported in the literature for measurement of pressure, i.e., force per area, e.g., via measurement of electrical capacity [ 6 ], resistivity [ 7 , 8 ], or optical effects [ 9 ]. Changes in inductance and the corresponding resonant frequency of circuits were also proposed as a principle to operate a pressure sensor [ 10 ].…”