A Flexible Capacitive Pressure Sensor for Wearable Respiration Monitoring System

Park, Seong Won; Das, Partha Sarati; Chhetry, Ashok; Park, Jae Yeong

doi:10.1109/jsen.2017.2749233

Cited by 107 publications

(75 citation statements)

References 39 publications

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“…As a particular case of sensors placed in the nose or mouth, several researchers integrated them into a mask [ 66 , 75 , 80 , 82 , 92 , 101 , 107 , 137 , 156 ]. This contrasts with locations, like fingers, waist, arms, or wrists, in which use was residual [ 93 , 115 , 117 , 118 , 126 , 139 , 157 ].…”

Section: Resultsmentioning

confidence: 96%

“…It was called “human observation”, since an expert provided a value of the breathing parameter from direct observation of the signals recorded by the sensors. Figure 28 shows that validation using a reference device was the predominant approach (adopted by 67% of the studies that performed validation), followed by the use of an artificial validation prototype (10%) [ 69 , 74 , 77 , 90 , 93 , 97 , 110 , 114 , 116 , 119 , 123 , 135 , 141 , 146 , 150 , 226 ]. It is also worth noting that 53 studies presented the sensing systems without providing evidence of their validation.…”

Section: Resultsmentioning

confidence: 99%

“…Other parameters, such as size or weight, can also affect the adoption of the technology. These parameters have only been provided in a limited number of studies [ 2 , 3 , 17 , 21 , 49 , 62 , 64 , 68 , 72 , 85 , 93 , 94 , 97 , 98 , 99 , 103 , 105 , 108 , 110 , 113 , 114 , 116 , 119 , 120 , 124 , 126 , 135 , 136 , 138 , 141 , 143 , 144 , 146 , 148 , 161 ]. Future works should also consider size and weight as important factors in the design of sensing systems, subjecting them to evaluation.…”

Section: Discussionmentioning

confidence: 99%

“… 1 Note: The analysis for studies published before 2018 [ 2 , 3 , 17 , 21 , 49 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 ...…”

Section: Figureunclassified

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Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Vanegas

Igual

Plaza

2020

Sensors

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Respiratory monitoring is essential in sleep studies, sport training, patient monitoring, or health at work, among other applications. This paper presents a comprehensive systematic review of respiration sensing systems. After several systematic searches in scientific repositories, the 198 most relevant papers in this field were analyzed in detail. Different items were examined: sensing technique and sensor, respiration parameter, sensor location and size, general system setup, communication protocol, processing station, energy autonomy and power consumption, sensor validation, processing algorithm, performance evaluation, and analysis software. As a result, several trends and the remaining research challenges of respiration sensors were identified. Long-term evaluations and usability tests should be performed. Researchers designed custom experiments to validate the sensing systems, making it difficult to compare results. Therefore, another challenge is to have a common validation framework to fairly compare sensor performance. The implementation of energy-saving strategies, the incorporation of energy harvesting techniques, the calculation of volume parameters of breathing, or the effective integration of respiration sensors into clothing are other remaining research efforts. Addressing these and other challenges outlined in the paper is a required step to obtain a feasible, robust, affordable, and unobtrusive respiration sensing system.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Figureunclassified

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Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Vanegas

Igual

Plaza

2020

Sensors

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“…Pressure sensor is a critical component that has been commonly used for monitoring and controlling in areas such as biomedical technologies 1 and auto industries 2,3 . A number of pressure sensors that operate based on different sensing mechanisms such as resistive 4 , capacitive 5 and inductive 6 are commercially available. These sensors, however, require the involvement of wires and batteries, which can restrict their mobility.…”

mentioning

confidence: 99%

Compact organic liquid dielectric resonator antenna for air pressure sensing using soft material

Low

Chee

Lim

et al. 2020

Sci Rep

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For the first time, a flexible and deformable liquid dielectric resonator antenna (LDRA) is proposed for air pressure sensing. The proposed LDRA can be made very compact as it has employed liquidized organic dielectric with high dielectric constant (~ 33) with low loss tangent (~ 0.05). Here, a soft elastomer container has been fabricated using soft-lithography method for holding the liquid, and an air cavity is tactfully embedded into the central part of a cylindrical DRA to form an annular structure that can be used for sensing air pressure. It will be shown that the inclusion of the air cavity is essential for making the antenna structure sensitive to pressure changes. Simulations and experiments have been conducted to verify the functionalities of the proposed organic LDRA as microwave radiator and as air pressure sensor. It has been proven to have higher antenna gain than the water LDRA in the frequency range of 1.8–2.8 GHz, while achieving a good air pressure sensitivity of 270 MHz/bar.

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Stretchable Thermoplastic Elastomer Optical Fibers for Sensing of Extreme Deformations

Leber

Cholst

Sandt

et al. 2018

Adv Funct Materials

111

110

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The design of advanced materials with coupled optical and mechanical properties is an important challenge in materials science; especially, the implementation of soft materials in optics has recently gained significant interest. Soft optical systems are particularly versatile in sensing, where large and repeated deformations require dynamically responsive materials. Here, stretchable step‐index optical fibers, which are capable of reversibly sustaining strains of up to 300% while guiding light, are demonstrated. A continuous and scalable melt‐flow process is used to coextrude two thermoplastic elastomers, thereby forming the fibers' high index core‐low index cladding structure. Deformation of the fibers through stretching, bending, and indentation induces detectable, predictable, reversible, and wavelength‐dependent changes in light transmission. Quantitative knowledge about the coupling of the fibers' mechanical and optical properties forms the basis for the design of fiber‐based sensors that are capable of reliably assessing extreme mechanical stimuli. The fibers utility in sensing scenarios is demonstrated in a knee brace for continuous knee motion tracking, a glove for control of a virtual hand model, and a tennis racket capable of locating ball impacts. Such devices can greatly improve quantitative assessment of human motion in rehabilitation, sports, and anywhere else where large deformations need to be monitored reliably.

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A Flexible Capacitive Pressure Sensor for Wearable Respiration Monitoring System

Cited by 107 publications

References 39 publications

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Sensing Systems for Respiration Monitoring: A Technical Systematic Review

Compact organic liquid dielectric resonator antenna for air pressure sensing using soft material

Stretchable Thermoplastic Elastomer Optical Fibers for Sensing of Extreme Deformations

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