Contactless Apnœa Detector Based on Radar

Caro, C.G.; Bloice, J.A.

doi:10.1016/s0140-6736(71)90274-1

Cited by 66 publications

(32 citation statements)

References 1 publication

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“…These examples give an insight about the working principle of respiratory sensing using EM waves, the different components used in such sensing systems and the antenna types and operating frequencies applied. This section also introduces SIW A preliminary experiment of an apnea detector that used radar to monitor respiratory movement dates back to 1971 [11]. The detector is composed of a radar transmitter and receiver operating in the 10 GHz range; i.e.…”

Section: Chapter 2 Backgroundmentioning

confidence: 99%

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Substrate‐integrated waveguide based antenna in remote respiratory sensing

Muharram

Okoniewski

2018

Micro & Optical Tech Letters

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In a hospital environment, continuous respiratory monitoring is important. It could reduce mortality incidents such as in central sleep apnea. Remote monitoring can be achieved using electromagnetic (EM) waves. Experimental EM systems use horn and patch antennas which do not offer low-profile or wide bandwidth features. This thesis proposes a substrateintegrated waveguide based antenna in respiratory monitoring.A leaky-wave array antenna is designed and fabricated. It operates between 8-9 GHz.The antenna size is 300 mm × 55 mm × 0.78 mm. It offers inexpensive beam-scanning ability to scan the bed. The antenna's beam width sufficiently covers a typical hospital bed.The fabricated antenna has measured return loss higher than 10 dB and radiates more than 90% of power in frequency range of interest. Measured main beam scans in E-plane (27• → 57 • ) with frequency. Measured peak gain is higher than 10 dBi.

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Section: Chapter 2 Backgroundmentioning

confidence: 99%

“…The detector in [11] was tested on newborn infants in incubators. The detector was about 2.5 cm above the incubator with the apparatus working through the walls of the incubator.…”

Section: Chapter 2 Backgroundmentioning

confidence: 99%

Substrate‐integrated waveguide based antenna in remote respiratory sensing

Muharram

Okoniewski

2018

Micro & Optical Tech Letters

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“…One radar based apnoea detection system by Caro and Bloke [7] was also able to work through the walls of an incubator. One downside was that it could not distinguish between breathing and body movement.…”

Section: A Magnetic Induction and Eddy Currentmentioning

confidence: 99%

Non-contact respiratory monitoring in neonates

Eastwood‐Sutherland

Gale

Dargaville

et al. 2014

The 7th 2014 Biomedical Engineering International Conference

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Breathing difficulties are common in neonatal pa-TABLE I tients, and non-contact respiratory monitoring is an area of BREAKDOWN OF VARIOUS NON-INVASIVE PLETHYSMOGR APHY METHODS.research which may potentially benefit patients and medical professionals alike by reducing disturbance of the patients by the monitoring system. This paper discusses a range of approaches used in recent years including magnetic, radio, optoelectronic and structured light. We also outline our research into using an optical time-of-f1ight system based on a game controller (Microsoft Kinect ™ v2) to measure respiratory parameters.

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“…oncontact sensing of human vital signals using Doppler radar technology has attracted much attention over the past decades [1]- [6]. There are numerous potential applications for a non-invasive technique to monitor respiration and/or heartbeat.…”

Section: Introductionmentioning

confidence: 99%

Effects of Antenna Characteristics on the Performance of Heart Rate Monitoring Radar Systems

Nosrati

Tavassolian

2017

IEEE Trans. Antennas Propagat.

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This paper presents an experimental study to evaluate the effects of antenna radiation parameters on the detection capabilities of a 2.4 GHz Doppler radar used in non-contact heart rate monitoring systems. Four different types of patch antennas and array configurations were implemented on both the transmitter and receiver sides. Extensive experiments using a linear actuator were performed and several interesting and nontrivial results were reported. It is shown that using a linearly polarized single patch antenna at the transmitter and a circularly polarized antenna array at the receiver results in the highest signal quality and system performance. Proof-ofconcept experiments on human subjects further validated the suggested results. It was also shown that using the recommended antenna arrangement will boost the heart rate detection accuracy of the radar by an average of 11%.

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Contactless Apnœa Detector Based on Radar

Cited by 66 publications

References 1 publication

Substrate‐integrated waveguide based antenna in remote respiratory sensing

Substrate‐integrated waveguide based antenna in remote respiratory sensing

Non-contact respiratory monitoring in neonates

Effects of Antenna Characteristics on the Performance of Heart Rate Monitoring Radar Systems

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