86465 20230914083237.0 doi 10.1155/2019/2431731 sideral 115168 ART-2019-115168 eng Vanegas, Erik Piezoresistive Breathing Sensing System with 3D Printed Wearable Casing 2019 Access copy available to the general public Unrestricted Respiratory rate is an important parameter for many health, home care, work, or sport applications. In this paper, a new wearable sensing system based on a piezoresistive FlexiForce sensor has been developed. The sensor can be attached to any common chest strap. A compact 3D casing has been designed and printed with a 3D printer. This casing integrates the sensor and all auxiliary elements of the system: microcontroller, battery, Bluetooth module, connections, battery charger, and acquisition circuit. To the best of our knowledge, this is the first study presenting a FlexiForce respiration sensor that includes all system elements in a single compact casing. The source files with the design of the casing have been published as supplementary material to be reused by any interested researcher. The sensing system was tested with twenty-one subjects for different breathing rates. Two different algorithms were developed to obtain the respiratory rate from the voltage signals recorded by the sensor. Statistical tests were performed to determine the optimal computation time window and algorithm. This approach is also novel in this field. Low error values were obtained for a time window of 27¿s with an algorithm based on the calculation of time between zero-crossings (4.02%) and with an algorithm based on counting them (3.40%). To promote research transparency and reusability, the dataset with the recorded data and the source code of the algorithms and statistical tests have also been published. Therefore, an open, replicable, low-error, wearable, wireless, and compact sensing system to measure respiratory rate was developed and tested. info:eu-repo/grantAgreement/ES/DGA/T49-17R info:eu-repo/grantAgreement/ES/UZ/CUD2019-TEC-02 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 1.595 2019 INSTRUMENTS & INSTRUMENTATION 38 / 64 = 0.594 2019 Q3 T2 ENGINEERING, ELECTRICAL & ELECTRONIC 172 / 265 = 0.649 2019 Q3 T2 0.373 2019 Control and Systems Engineering 2019 Q2 Electrical and Electronic Engineering 2019 Q2 Instrumentation 2019 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Igual, Raúl Universidad de Zaragoza (orcid)0000-0002-1561-0536 Plaza, Inmaculada Universidad de Zaragoza (orcid)0000-0001-7550-6688 5008 785 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Tecnología Electrónica 5009 535 Universidad de Zaragoza Dpto. Ingeniería Eléctrica Área Ingeniería Eléctrica 2019 (2019), 1-19 J. sens. Journal of Sensors 1687-725X 1450397 http://zaguan.unizar.es/record/86465/files/texto_completo.pdf Versión publicada 20883 http://zaguan.unizar.es/record/86465/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:86465 articulos driver 2023-09-13-10:46:35 ARTICLE