Title :
A respiration sensor for a chest-strap based wireless body sensor
Author :
Hesse, Marc ; Christ, Peter ; Hormann, Timm ; Ruckert, Ulrich
Author_Institution :
Cognitronics & Sensor Syst. Group, Bielefeld Univ., Bielefeld, Germany
Abstract :
In this paper we present a respiration sensor suitable for an integration into a wireless body sensor worn around the chest. The thorax expansion and contraction during in- and exhalation is captured using a force-sensing resistor. Based on the captured thoracic movements, the breaths are determined with a peak detection algorithm. For evaluation, a treadmill experiment with five subjects was conducted using an ergospirometry system as a reference. Overall, an average deviation of -0.32±0.68 min-1 in the respiration rate between the ergospirometry and our sensor was observed. In general, the captured thoracic movements showed breaths as distinctive oscillations, but in some cases a non-optimal pressure transfer between thorax and sensor was observed. Therefore, a mechanical housing mechanism was developed. A comparison of our construction with a respiratory inductance plethysmography (RIP)-based sensor shows a close relationship with the captured thoracic movements during normal and deep respiration.
Keywords :
biomedical transducers; body sensor networks; force sensors; packaging; peak detectors; pressure sensors; wireless sensor networks; RIP; chest-strap based wireless body sensor; ergospirometry system; force-sensing resistor; mechanical housing mechanism; nonoptimal pressure transfer; oscillation; peak detection algorithm; respiration sensor; respiratory inductance plethysmography; thoracic movement; thorax contraction; thorax expansion; treadmill experiment; Accelerometers; Biomedical monitoring; Plethysmography; Resistors; Temperature measurement; Wireless communication; Wireless sensor networks;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6985042