scholarly journals Ultra Wideband Radar for Respiratory Monitoring on Sleep Position

2021 ◽  
Author(s):  
Nurul Qashri Mahardika T ◽  
Erfansyah Ali ◽  
Fiky Yosef Suratman
Keyword(s):  
Body Mass Index ◽  
Sleep Apnea ◽  
Respiratory Rate ◽  
Systematic Study ◽  
Ultra Wideband ◽  
Sleep Position ◽  
Radar Sensor ◽  
Body Contact ◽  
The Doppler Effect ◽  
Wideband Radar

Sleep apnea is a sleep disorder that has a relation with respiratory system during sleep. One of the sleep apnea characteristic is suddenly stop breathing during sleep. People have the different of respiratory rate (RR) which is affected by sleep positions and body mass index (BMI).There are four sleep positions affecting the respiratory rate (RR). Polysomnography (PSG) is conventionally used to analysis the sleep apnea. This technique requires body contact that might be uncomfortable for the patient. In this study, the Xethru X4M200 radar sensor is proposed as non-contact tool to detect the RR by implementing the Doppler effect. Furthermore, the relation between RR with the sleep position and the BMI are discused. For that purpose, 20 participants (10 males and 10 females) with dierent BMIs and sleep positions are examined by monitoring their chest movement. This method is able to detect the indication of bradypnoea or tachypnoea. Futher systematic study and more participants are required to confirm our results and provide better non-contact technique for RR measurement.

scholarly journals Validation of a New Contactless and Continuous Respiratory Rate Monitoring Device Based on Ultra-Wideband Radar Technology

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4027
Author(s):  
Timo Lauteslager ◽  
Michal Maslik ◽  
Fares Siddiqui ◽  
Saad Marfani ◽  
Guy D. Leschziner ◽  
...  
Keyword(s):  
Respiratory Rate ◽  
Clinical Sample ◽  
Study Data ◽  
Ultra Wideband ◽  
Clinical Settings ◽  
User Characteristics ◽  
Novel Device ◽  
Gold Standard Reference ◽  
Wideband Radar ◽  
Remote Patient

Respiratory rate (RR) is typically the first vital sign to change when a patient decompensates. Despite this, RR is often monitored infrequently and inaccurately. The Circadia Contactless Breathing Monitor™ (model C100) is a novel device that uses ultra-wideband radar to monitor RR continuously and un-obtrusively. Performance of the Circadia Monitor was assessed by direct comparison to manually scored reference data. Data were collected across a range of clinical and non-clinical settings, considering a broad range of user characteristics and use cases, in a total of 50 subjects. Bland–Altman analysis showed high agreement with the gold standard reference for all study data, and agreement fell within the predefined acceptance criteria of ±5 breaths per minute (BrPM). The 95% limits of agreement were −3.0 to 1.3 BrPM for a nonprobability sample of subjects while awake, −2.3 to 1.7 BrPM for a clinical sample of subjects while asleep, and −1.2 to 0.7 BrPM for a sample of healthy subjects while asleep. Accuracy rate, using an error margin of ±2 BrPM, was found to be 90% or higher. Results demonstrate that the Circadia Monitor can effectively and efficiently be used for accurate spot measurements and continuous bedside monitoring of RR in low acuity settings, such as the nursing home or hospital ward, or for remote patient monitoring.

High-resolution imaging of dielectric profiles by using a time-domain ultra wideband radar sensor

Measurement ◽  
2011 ◽  
Vol 44 (5) ◽  
pp. 859-870 ◽  
Author(s):  
Mohd Z. Abdullah ◽  
Saed A. Binajjaj ◽  
Tareq F. Zanoon ◽  
Anthony J. Peyton
Keyword(s):  
High Resolution ◽  
Time Domain ◽  
Ultra Wideband ◽  
High Resolution Imaging ◽  
Radar Sensor ◽  
Resolution Imaging ◽  
Wideband Radar

scholarly journals Non-contact diagnosis of obstructive sleep apnea using impulse-radio ultra-wideband radar

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sun Kang ◽  
Dong-Kyu Kim ◽  
Yonggu Lee ◽  
Young-Hyo Lim ◽  
Hyun-Kyung Park ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Impulse Radio ◽  
Ultra Wideband ◽  
Obstructive Sleep ◽  
Wideband Radar

scholarly journals Linear Tapered Slot Antenna for Ultra-Wideband Radar Sensor: Design Consideration and Recommendation

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1212 ◽  
Author(s):  
Vincent Tseng ◽  
Cheng-Yuan Chang
Keyword(s):  
Radiation Pattern ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Far Field ◽  
Radar Sensor ◽  
Different Types ◽  
Field Radiation ◽  
Critical Characteristics ◽  
Wideband Radar ◽  
Design Simplicity

Radar is a type of wireless, noncontact sensor that does not need to be placed on or near a test object for detection. A key component of any radar sensor is the antenna. Among different types of antennas, the linear tapered slot antenna (LTSA) is a wideband antenna that has the advantages of small size, design simplicity, and easy adaptation to an array. This study examined and analyzed the 10 primary parameters that define the LTSA design when operated in the ultra-wideband (UWB) frequency range. The study method involved varying each of the 10 parameters to discern how the variations impact the three critical characteristics of an antenna, namely, (1) return loss, (2) the far field radiation pattern on the E-plane, and (3) the far field radiation pattern on the H-plane. By analyzing the changes in these critical characteristics, a set of design recommendations for the 10 parameters was developed for the LTSA.

Detection and Localization of People Inside Vehicle Using Impulse Radio Ultra-Wideband Radar Sensor

2020 ◽  
Vol 20 (7) ◽  
pp. 3892-3901 ◽  
Author(s):  
Sohee Lim ◽  
Seongwook Lee ◽  
Jaehoon Jung ◽  
Seong-Cheol Kim
Keyword(s):  
Impulse Radio ◽  
Ultra Wideband ◽  
Radar Sensor ◽  
Wideband Radar ◽  
Detection And Localization

scholarly journals Robot vision ultra-wideband wireless sensor in non-cooperative industrial environments

2018 ◽  
Vol 15 (4) ◽  
pp. 172988141879576 ◽  
Author(s):  
Pavol Galajda ◽  
Alena Galajdova ◽  
Stanislav Slovak ◽  
Martin Pecovsky ◽  
Milos Drutarovsky ◽  
...  
Keyword(s):  
Data Fusion ◽  
Real Time ◽  
Sensor Network ◽  
Ultra Wideband ◽  
Fusion Center ◽  
Radar Sensor ◽  
Robot Gripper ◽  
Industrial Environments ◽  
Wideband Radar ◽  
Localization And Tracking

In this article, the ultra-wideband technology for localization and tracking of the robot gripper (behind the obstacles) in industrial environments is presented. We explore the possibilities of ultra-wideband radar sensor network employing the centralized data fusion method that can significantly improve tracking capabilities in a complex environment. In this article, we present ultra-wideband radar sensor network hardware demonstrator that uses a new wireless ultra-wideband sensor with an embedded controller to detect and track online or off-line movement of the robot gripper. This sensor uses M-sequence ultra-wideband radars front-end and low-cost powerful processors on a system on chip with the advanced RISC machines (ARM) architecture as a main signal processing block. The ARM-based single board computer ODROID-XU4 platform used in our ultra-wideband sensor can provide processing power for the preprocessing of received raw radar signals, algorithms for detection and estimation of target’s coordinates, and finally, compression of data sent to the data fusion center. Data streams of compressed target coordinates are sent from each sensor node to the data fusion center in the central node using standard the wireless local area network (WLAN) interface that is the feature of the ODROID-XU4 platform. The article contains experimental results from measurements where sensors and antennas are located behind the wall or opaque material. Experimental testing confirmed capability of real-time performance of developed ultra-wideband radar sensor network hardware and acceptable precision of software. The introduced modular architecture of ultra-wideband radar sensor network can be used for fast development and testing of new real-time localization and tracking applications in industrial environments.

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