A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters

Beitrag in einer Fachzeitschrift
(Online-Publikation)


Details zur Publikation

Autorinnen und Autoren: Michler F, Shi K, Schellenberger S, Steigleder T, Malessa A, Hameyer L, Neumann N, Lurz F, Ostgathe C, Weigel R, Kölpin A
Zeitschrift: Sensors
Jahr der Veröffentlichung: 2019
Band: 19
Heftnummer: 11
ISSN: 1424-8220
Sprache: Englisch


Abstract

Vital parameters are key indicators for the assessment of health. Conventional methods rely on direct contact with the patients’ skin and can hence cause discomfort and reduce autonomy. This article presents a bistatic 24 GHz radar system based on an interferometric six-port architecture and features a precision of 1 µm in distance measurements. Placed at a distance of 40 cm in front of the human chest, it detects vibrations containing respiratory movements, pulse waves and heart sounds. For the extraction of the respiration rate, time-domain approaches like autocorrelation, peaksearch and zero crossing rate are compared to the Fourier transform, while template matching and a hidden semi-Markov model are utilized for the detection of the heart rate from sphygmograms and heart sounds. A medical study with 30 healthy volunteers was conducted to collect 5.5 h of data, where impedance cardiogram and electrocardiogram were used as gold standard for synchronously recording respiration and heart rate, respectively. A low root mean square error for the breathing rate (0.828 BrPM) and a high overall F1 score for heartbeat detection (93.14%) could be achieved using the proposed radar system and signal processing.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Lurz, Fabian
Ostgathe, Christoph Prof. Dr.
Lehrstuhl für Technische Elektronik
Professur für Palliativmedizin
Malessa, Anke Dr.
Abteilung für Palliativmedizin
Michler, Fabian
Lehrstuhl für Technische Elektronik
Schellenberger, Sven
Lehrstuhl für Technische Elektronik
Shi, Kilin
Lehrstuhl für Technische Elektronik
Weigel, Robert Prof. Dr.-Ing.
Lehrstuhl für Technische Elektronik


Einrichtungen weiterer Autorinnen und Autoren

Brandenburgische Technische Universität Cottbus-Senftenberg (BTU)


Zitierweisen

APA:
Michler, F., Shi, K., Schellenberger, S., Steigleder, T., Malessa, A., Hameyer, L.,... Kölpin, A. (2019). A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters. Sensors, 19(11). https://dx.doi.org/10.3390/s19112492

MLA:
Michler, Fabian, et al. "A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters." Sensors 19.11 (2019).

BibTeX: 

Zuletzt aktualisiert 2019-31-05 um 23:53