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Sensors 2016, 16(8), 1169; doi:10.3390/s16081169

Short-Range Noncontact Sensors for Healthcare and Other Emerging Applications: A Review

Google Inc., Mountain View, CA 94043, USA
Academic Editor: Changzhi Li
Received: 5 June 2016 / Revised: 18 July 2016 / Accepted: 18 July 2016 / Published: 26 July 2016
(This article belongs to the Special Issue Non-Contact Sensing)

Abstract

Short-range noncontact sensors are capable of remotely detecting the precise movements of the subjects or wirelessly estimating the distance from the sensor to the subject. They find wide applications in our day lives such as noncontact vital sign detection of heart beat and respiration, sleep monitoring, occupancy sensing, and gesture sensing. In recent years, short-range noncontact sensors are attracting more and more efforts from both academia and industry due to their vast applications. Compared to other radar architectures such as pulse radar and frequency-modulated continuous-wave (FMCW) radar, Doppler radar is gaining more popularity in terms of system integration and low-power operation. This paper reviews the recent technical advances in Doppler radars for healthcare applications, including system hardware improvement, digital signal processing, and chip integration. This paper also discusses the hybrid FMCW-interferometry radars and the emerging applications and the future trends. View Full-Text
Keywords: radar; CW; FMCW; noncontact; biomedical; gesture; microwave; Doppler; vital sign radar; CW; FMCW; noncontact; biomedical; gesture; microwave; Doppler; vital sign
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gu, C. Short-Range Noncontact Sensors for Healthcare and Other Emerging Applications: A Review. Sensors 2016, 16, 1169.

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