A See-through-Wall System for Device-Free Human Motion Sensing Based on Battery-Free RFID

2018 ◽  
Vol 17 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Zhongqin Wang ◽  
Fu Xiao ◽  
Ning Ye ◽  
Ruchuan Wang ◽  
Panlong Yang
Keyword(s):  
Human Motion ◽  
Motion Sensing ◽  
Device Free ◽  
Wall System

DF-Mose : Device-Free Motion Sensing with Wireless Backscattering

2019 ◽  
Author(s):  
Ning Xiao ◽  
Panlong Yang ◽  
Yubo Yan ◽  
Hao Zhou ◽  
Jiahui Hou ◽  
...  
Keyword(s):  
Free Motion ◽  
Motion Sensing ◽  
Device Free

A New Hybrid Lead‐Free Metal Halide Piezoelectric for Energy Harvesting and Human Motion Sensing

Small ◽  
2021 ◽  
pp. 2103829
Author(s):  
Tian‐Meng Guo ◽  
Yong‐Ji Gong ◽  
Zhi‐Gang Li ◽  
Yi‐Ming Liu ◽  
Wei Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Human Motion ◽  
Metal Halide ◽  
Lead Free ◽  
Motion Sensing ◽  
Free Metal

scholarly journals Antibacterial, Flexible, and Conductive Membrane Based on MWCNTs/Ag Coated Electro-Spun PLA Nanofibrous Scaffolds as Wearable Fabric for Body Motion Sensing

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 120 ◽  
Author(s):  
Lu Gan ◽  
Aobo Geng ◽  
Ying Wu ◽  
Linjie Wang ◽  
Xingyu Fang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silver Nanoparticles ◽  
Three Dimensional ◽  
Antibacterial Properties ◽  
Human Motion ◽  
Body Motion ◽  
Body Parts ◽  
Motion Sensing ◽  
Nanofibrous Scaffolds ◽  
Conductive Membrane

In the present study, flexible and conductive nanofiber membranes were prepared by coating PLA nanofibrous scaffolds with carbon nanotubes and silver nanoparticles. The morphology and structure of the prepared membrane was characterized, as well as its mechanical properties, electrical sensing behavior during consecutive stretching-releasing cycles and human motion detecting performance. Furthermore, the antibacterial properties of the membrane was also investigated. Due to the synergistic and interconnected three-dimensional (3D) conductive networks, formed by carbon nanotubes and silver nanoparticles, the membrane exhibited repeatable and durable strain-dependent sensitivity. Further, the prepared membrane could accurately detect the motions of different body parts. Accompanied with promising antibacterial properties and washing fastness, the prepared flexible and conductive membrane provides great application potential as a wearable fabric for real-time body motion sensing.

Wi-Fi based passive human motion sensing for in-home healthcare applications

2015 ◽  
Author(s):  
Bo Tan ◽  
Alison Burrows ◽  
Robert Piechocki ◽  
Ian Craddock ◽  
Qingchao Chen ◽  
...  
Keyword(s):  
Human Motion ◽  
Home Healthcare ◽  
Motion Sensing ◽  
Healthcare Applications

Development of IoT Device for Human Motion Sensing

2020 ◽  
Vol 2020 (0) ◽  
pp. 1P1-E01
Author(s):  
Kensuke TAKITA ◽  
Shu ISHIGURO ◽  
Hiroshi YAMAKAWA ◽  
Qi AN ◽  
Hajime ASAMA
Keyword(s):  
Human Motion ◽  
Motion Sensing

scholarly journals A Lightweight Passive Human Tracking Method Using Wi-Fi

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 541
Author(s):  
Jian Fang ◽  
Lei Wang ◽  
Zhenquan Qin ◽  
Bingxian Lu ◽  
Wenbo Zhao ◽  
...  
Keyword(s):  
Target Tracking ◽  
Human Motion ◽  
Wireless Devices ◽  
Target Movement ◽  
Channel State ◽  
Time Model ◽  
Tracking Method ◽  
Extensive Evaluation ◽  
Device Free ◽  
The Impact

Target tracking is a critical technique for localization in an indoor environment. Current target-tracking methods suffer from high overhead, high latency, and blind spots issues due to a large amount of data needing to be collected or trained. On the other hand, a lightweight tracking method is preferred in many cases instead of just pursuing accuracy. For this reason, in this paper, we propose a Wi-Fi-enabled Infrared-like Device-free (WIDE) method for target tracking to realize a lightweight target-tracking method. We first analyze the impact of target movement on the physical layer of the wireless link and establish a near real-time model between the Channel State Information (CSI) and human motion. Secondly, we make full use of the network structure formed by a large number of wireless devices already deployed in reality to achieve the goal. We validate the WIDE method in different environments. Extensive evaluation results show that the WIDE method is lightweight and can track targets rapidly as well as achieve satisfactory tracking results.

scholarly journals Analysis of a Dynamic Calibration Target for Through-Wall and Through-Rubble Motion Sensing Doppler Radar

Instruments ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 37
Author(s):  
Ram M. Narayanan ◽  
Michael J. Harner ◽  
John R. Jendzurski ◽  
Nicholas G. Paulter
Keyword(s):  
Doppler Radar ◽  
Human Motion ◽  
Human Detection ◽  
Dynamic Calibration ◽  
Motion Sensing ◽  
Calibration Target ◽  
Cross Sectional ◽  
Sensing Systems ◽  
Human Respiration ◽  
Field Deployment

Through-wall and through-barrier motion-sensing systems are becoming increasingly important tools to locate humans concealed behind barriers and under rubble. The sensing performance of these systems is best determined with appropriately designed calibration targets, which are ones that can emulate human motion. The effectiveness of various dynamic calibration targets that emulate human respiration, heart rate, and other body motions were analyzed. Moreover, these targets should be amenable to field deployment and not manifest angular or orientation dependences. The three targets examined in this thesis possess spherical polyhedral geometries. Spherical geometries were selected due to their isotropic radar cross-sectional characteristics, which provide for consistent radar returns independent of the orientation of the radar transceiver relative to the test target. The aspect-independence of a sphere allows for more accurate and repeatable calibration of a radar than using a nonspherical calibration artifact. In addition, the radar cross section (RCS) for scattering spheres is well known and can be calculated using far-field approximations. For Doppler radar testing, it is desired to apply these calibration advantages to a dynamically expanding-and-contracting sphere-like device that can emulate motions of the human body. Monostatic RCS simulations at 3.6 GHz were documented for each geometry. The results provide a visual way of representing the effectiveness of each design as a dynamic calibration target for human detection purposes.

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