Noncontact Respiration Measurement Inside and Outside Electromagnetic Anechoic Chamber Using Millimeter-Wave Radar

Abstract

Noncontact vital signs sensing is the technology for measuring vitals without attaching measuring instruments to the human body. Compared with the contact type, the noncontact type does not require the stress of mounting a measuring instrument. In addition, it is an effective means for patients who have difficulty attaching measurement instruments. This paper focuses on a millimeter-wave (MMW) radar as a device for noncontact vital signs sensing, and we develop a noncontact respiration measurement system using the MMW radar. We have experimentally measured the respiration rate of a subject using the developed system inside and outside the electromagnetic anechoic chamber. As a result, we have confirmed that the measured respiration rate corresponds to the subject-counted respiration rate. Moreover, there was almost no effect of environmental noise on the respiration rate measurement with this study's experimental environment and parameters.