A wearable yarn-based piezo-resistive sensor

Huang, Ching‐Tang; Shen, Chien-Lung; Tang, Chien-Fa; Chang, Shuo-Hung

doi:10.1016/j.sna.2007.10.069

Cited by 229 publications

(132 citation statements)

References 17 publications

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“…Fiber based sensors were also developed primarily from piezo-resistive fibers, elastic and regular polyester fibers. These sensors were used for conducting experiments for different applications like respiration [148] and cardiovascular diseases [149]. Another category called, plastic optical fibers were used to pressure sensors [150].…”

Section: Sensor Network For Wearable Flexible Sensorsmentioning

confidence: 99%

Wearable Flexible Sensors: A Review

2017

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Abstract-The paper provides a review on some of the significant research work done on wearable flexible sensors (WFS). Sensors fabricated with flexible materials have been attached to a person along with the embedded system to monitor a parameter and transfer the significant data to the monitoring unit for further analyses. The use of wearable sensors has played a quite important role to monitor physiological parameters of a person to minimize any malfunctioning happening in the body. The paper categorizes the work according to the materials used for designing the system, the network protocols and different types of activities that were being monitored. The challenges faced by the current sensing systems and future opportunities for the wearable flexible sensors regarding its market values are also briefly explained in the paper.

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Section: Sensor Network For Wearable Flexible Sensorsmentioning

confidence: 99%

Wearable Flexible Sensors: A Review

2017

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“…When the fluid reaches the end of the channel it is stored using a super absorbent (SAB) material, which acts to continuously draw fresh sweat from the skin surface to provide a passive pumping action. The absorbent (Absortex) is supplied by Smartex (www.smartex.ie) and has a free swell capacity of 25 g/g and a basis weight of 172 g/m 2 . To obtain 2 hours operation at an average sweat rate of 17 mg/min, for the lower back [9], the pump must be able to collect 2 g of sweat.…”

Section: Wearable Technology For Bio-chemical Analysis Of Body Fluidsmentioning

confidence: 99%

Wearable technology for bio-chemical analysis of body fluids during exercise

Morris

Schazmann

et al. 2008

2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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Abstract-This paper details the development of a textile based fluid handling system with integrated wireless biochemical sensors. Such research represents a new advancement in the area of wearable technologies. The system contains pH, sodium and conductivity sensors. It has been demonstrated during on-body trials that the pH sensor has close agreement with measurements obtained using a reference pH probe. Initial investigations into the sodium and conductivity sensors have shown their suitability for integration into the wearable system. It is thought that applications exist in personal health and sports performance and training. I. INTRODUCTIONO date the majority of research in the area of wearable sensors has focused on the development of devices which measure physical parameters such as motion, respiration and heart rate [1]- [3]. However, textiles are often employed in sports applications to capture body fluids and wick them away from the skin surface. Such fabrics can be used as a platform for the development of biochemical sensors used to monitor the changing composition of fluids such as sweat under stress or exercise.Sweat is a clear hypotonic odorless fluid often described as an ultrafiltrate of plasma. Its major constituents are sodium, potassium, calcium, magnesium and chloride [4]. It is easily accessible with the sweat rate in human males during exercise measured in the region of 0.85 mg cm -2 min -1 for the lower back. Changes in the composition of sweat can be used to provide information on a person's physiological condition [5]. In addition, prolonged exercise can lead to dehydration and a change in the electrolyte concentrations in sweat. For elite athletes, a visible reduction in performance will occur for a 2 % drop in body weight due to dehydration. Further fluid loss can lead to symptoms such as irritability, headache, dizziness, cramps, vomiting, increased body temperature and heart rate, increased perceived work rate, reduced mental function, slower gastric emptying [6].

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“…Although prior studies regarding thread as a substrate focused exclusively on one aspect, such as microfluidics or sensors 29,32 with a single thread type for ex vivo low-cost diagnostic applications, we demonstrate an integrated TDD platform for implantable applications with a diverse and greatly expanded toolkit of sensors, electronics, and microfluidic functions, such as custom-designed nano-infused threads as multiple chemical and physical sensors.…”

Section: Introductionmentioning

confidence: 99%

A toolkit of thread-based microfluidics, sensors, and electronics for 3D tissue embedding for medical diagnostics

et al. 2016

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Threads, traditionally used in the apparel industry, have recently emerged as a promising material for the creation of tissue constructs and biomedical implants for organ replacement and repair. The wicking property and flexibility of threads also make them promising candidates for the creation of three-dimensional (3D) microfluidic circuits. In this paper, we report on thread-based microfluidic networks that interface intimately with biological tissues in three dimensions. We have also developed a suite of physical and chemical sensors integrated with microfluidic networks to monitor physiochemical tissue properties, all made from thread, for direct integration with tissues toward the realization of a thread-based diagnostic device (TDD) platform. The physical and chemical sensors are fabricated from nanomaterial-infused conductive threads and are connected to electronic circuitry using thread-based flexible interconnects for readout, signal conditioning, and wireless transmission. To demonstrate the suite of integrated sensors, we utilized TDD platforms to measure strain, as well as gastric and subcutaneous pH in vitro and in vivo.

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A wearable yarn-based piezo-resistive sensor

Cited by 229 publications

References 17 publications

Wearable Flexible Sensors: A Review

Wearable Flexible Sensors: A Review

Wearable technology for bio-chemical analysis of body fluids during exercise

A toolkit of thread-based microfluidics, sensors, and electronics for 3D tissue embedding for medical diagnostics

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