Fiber-Optic Based Smart Textiles for Real-Time Monitoring of Breathing Rate

Issatayeva, Aizhan; Beisenova, Aidana; Tosi, Daniele; Molardi, Carlo

doi:10.3390/s20123408

Cited by 50 publications

(41 citation statements)

References 30 publications

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“…A competitive method for monitoring respiratory behavior for the chest and abdomen regions is based on Fiber Bragg Grating (FBG) sensors, which have been investigated for their advantages, such as high sensitivity, magnetic resonance compatibility, and the capability of performing distributed measurements [14,15]. Other breath monitoring solutions, still based on optical fiber, are also being considered [16,17].…”

Section: Introductionmentioning

confidence: 99%

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Piuzzi

Pisa

Pittella

et al. 2020

Sensors

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Unobtrusive and continuous monitoring of vital signs is becoming more and more important both for patient monitoring in the home environment and for sports activity tracking. Even though many gadgets and clinical systems exist, the need for simple, low-cost and easily applicable solutions still remains, especially in view of a more widespread use within everyone’s reach. The paper presents a fully wearable and wireless sensorized belt, suitable to simultaneously acquire respiratory and cardiac signals employing a single acquisition channel. The adopted method relies on a 50-kHz current injected in the subject thorax through a couple of textile electrodes and on envelope detection of the trans-thoracic voltage acquired from a couple of different embedded electrodes. The resulting signal contains both the baseband electrocardiogram (ECG) signal and the trans-thoracic impedance signal, which encodes respiratory acts. The two signals can be easily separated through suitable filtering and the cardio–respiratory rates extracted. The proposed solution yields performances comparable to those of a spirometer and a two-lead ECG. The whole system, with a realization cost below 100 €, a wireless interface, and several hours (or even days) of autonomy, is a suitable candidate for everyday use, especially if complemented by motion artifact removal techniques, currently under implementation.

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Section: Introductionmentioning

confidence: 99%

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Piuzzi

Pisa

Pittella

et al. 2020

Sensors

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“…A possible solution is to integrate multiple SMS fiber sensors into the elastic belts and attach to different positions of the body. Using diversity-based signal processing method [16] to process the measurements with different SMS sensors, it is possible to compensate the influence of body movements and realize accurate RR monitoring. Measurement of other physiological parameters are also possible using the developed SMS sensor.…”

Section: Discussionmentioning

confidence: 99%

“…Fiber Bragg Grating (FBG) is also applied to monitor respiration, by utilizing its sensing property to strain, curvature, temperature, and relative humidity [12][13][14][15]. In 2020, Aizhan Issatayera et al proposed a FBGs array-based system attached to the human chest and abdomen for respiration monitoring, which adopted multi-point measurements to counteract the interference of body measurements [16]. In 2019, Diaz et al proposed a portable interrogator for dynamic assessment of knee angle and displacement by embedding FBG and FPI in different flexible structures [17].…”

Section: Introductionmentioning

confidence: 99%

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

Pang

Liu

et al. 2021

IEEE Sensors J.

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Respiration rate (RR) is an important information related to human physiological health. A wearable optical fiber sensor for respiration monitoring based on a bend singlemode-multimodesinglemode (SMS) fiber structure, which is highly sensitive to bend, is firstly proposed and experimentally demonstrated. The sensor fastened by an elastic belt on the abdomen of a person will acquire the respiration signal when the person breaths, which will introduce front and back movement of the abdomen, and thus bend of SMS fiber structure. Short-time Fourier transform (STFT) method is employed for signal processing to extract characteristic information of both the time and frequency domain of the measured waveform, which provides accurate RR measurement. Six different SMS fiber sensors have been tested by six individuals and the experimental results demonstrated that the RR signals can be effectively monitored among different individuals, where an average Pearson Correlation Coefficient of 0.88 of the respiration signal has been achieved, which agrees very well with that of commercial belt respiration sensor. The proposed technique can provide a new wearable and portable solution for monitoring of respiratory with advantage of easy fabrication and robust to environment.

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“…In particular, Fiber Bragg Grating (FBG) sensors are able to convert the physical movement of the thorax during inspiration and expiration into a wavelength shift. For this reason, this technique has been exploited in several research works [ 71 ].…”

Section: Measurement Of Physiological Parametersmentioning

confidence: 99%

Smart Textiles and Sensorized Garments for Physiological Monitoring: A Review of Available Solutions and Techniques

Angelucci

Cavicchioli

Cintorrino

et al. 2021

Sensors

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Several wearable devices for physiological and activity monitoring are found on the market, but most of them only allow spot measurements. However, the continuous detection of physiological parameters without any constriction in time or space would be useful in several fields such as healthcare, fitness, and work. This can be achieved with the application of textile technologies for sensorized garments, where the sensors are completely embedded in the fabric. The complete integration of sensors in the fabric leads to several manufacturing techniques that allow dealing with both the technological challenges entailed by the physiological parameters under investigation, and the basic requirements of a garment such as perspiration, washability, and comfort. This review is intended to provide a detailed description of the textile technologies in terms of materials and manufacturing processes employed in the production of sensorized fabrics. The focus is pointed at the technical challenges and the advanced solutions introduced with respect to conventional sensors for recording different physiological parameters, and some interesting textile implementations for the acquisition of biopotentials, respiratory parameters, temperature and sweat are proposed. In the last section, an overview of the main garments on the market is depicted, also exploring some relevant projects under development.

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Fiber-Optic Based Smart Textiles for Real-Time Monitoring of Breathing Rate

Cited by 50 publications

References 30 publications

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Wearable Belt With Built-In Textile Electrodes for Cardio—Respiratory Monitoring

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

Smart Textiles and Sensorized Garments for Physiological Monitoring: A Review of Available Solutions and Techniques

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