22 papers · ranked by Valyu relevance
Laurent Oudre, Rémi Barrois-Müller, Thomas Moreau, Charles Truong + 4 more
'Aliénor Vienne-Jumeau' 'Damien Ricard' 'Nicolas Vayatis' 'Pierre-Paul Vidal'] This article presents a method for step detection from accelerometer and gyrometer signals recorded with Inertial Measurement Units (IMUs). The principle of our step detection algorithm is to recognize the start and end times of the steps in…
Michał Zieliński, Andrzej Chybicki, Aleksandra Borsuk, Xiansheng Guo
Indoor navigation (IN) systems are increasingly essential in environments where GPS signals are unreliable, such as hospitals, airports, and large public buildings. This study explores a smartphone-based approach to indoor positioning that leverages inertial sensor data for accurate step detection and counting, which…
Estefania Munoz Diaz, Kourosh Khoshelham, Sisi Zlatanova
Inertial navigation systems use dead-reckoning to estimate the pedestrian's position. There are two types of pedestrian dead-reckoning, the strapdown algorithm and the step-and-heading approach. Unlike the strapdown algorithm, which consists of the double integration of the three orthogonal accelerometer readings, the…
Kaede Shintani, Hamada Rizk, Hirozumi Yamaguchi
The field of energy-free sensing and context recognition has recently gained significant attention as it allows operating systems without external power sources. Photovoltaic cells can convert light energy into electrical energy to power sensing devices, but their power may not be sufficient to ensure energy-free…
Maan Khedr, Nasser El-Sheimy
The growing market of smart devices make them appealing for various applications. Motion tracking can be achieved using such devices, and is important for various applications such as navigation, search and rescue, health monitoring, and quality of life-style assessment. Step detection is a crucial task that affects…
Hwan-hee Lee, Suji Choi, Myeong-jin Lee, Xue Wang
A novel algorithm is proposed for robust step detection irrespective of step mode and device pose in smartphone usage environments. The dynamics of smartphones are decoupled into a peak-valley relationship with adaptive magnitude and temporal thresholds. For extracted peaks and valleys in the magnitude of acceleration…
Roya Norouzi Kandalan, Kamesh Namuduri
Sight is essential for humans to navigate their surrounding environment independently. Tasks that are simple for the sighted are often close to impossible for the visually impaired. Throughout the years, many researchers dedicated their time and efforts to design and implement technologies and devices that can help the…
Adrian Rodriguez Rivadulla, Xi Chen, Gillian Weir, Dario Cazzola + 3 more
The accurate detection of foot-strike and toe-off is often critical in the assessment of running biomechanics. The gold standard method for step event detection requires force data which are not always available. Although kinematics-based algorithms can also be used, their accuracy and generalisability are limited…
Ahmad Abadleh, Eshraq Al-Hawari, Esra’a Alkafaween, Hamad Alsawalqah
— In this paper, a new Smartphone sensor based algorithm is proposed to detect accurate distance estimation. The algorithm consists of two phases; the first phase is for detecting the peaks from the Smartphone accelerometer sensor. The other one is for detecting the step length which varies from step to step. The…
Eduardo C. Latorre, Marcos D. Zuniga, Enrique Arriaza, Fabian Moya + 1 more
'Christopher Nikulin'] In collective sports, reactive agility training methodologies allow to evaluate and improve the player performance, being able to consider a mixture of technical, tactical, physical, and psychological abilities, similarly to real game-play situations. In this article, we present a new methodology…
Lorenza Angelini, Dimitar Stanev, Marta Płonka, Rafał Klimas + 11 more
Background: Many attempts to validate gait pipelines, a framework that processes sensor data to detect gait events for subsequent computation of gait-related measures, have focused on validating the detection of initial over final contacts in supervised settings using a single sensor. Objective: To evaluate the…
Margit M. Bach, Nadia Dominici, Andreas Daffertshofer
Accelerometers are low-cost measurement devices that can readily be used outside the lab. However, determining isolated gait events from accelerometer signals, especially foot-off events during running, is an open problem. We outline a two-step approach where machine learning serves to predict vertical ground reaction…
Van Thanh Pham, Duc Anh Nguyen, Nhu Dinh Dang, Hong Hai Pham + 3 more
'Van An Tran' 'Kumbesan Sandrasegaran' 'Duc-Tan Tran'] Accurate step counting is essential for indoor positioning, health monitoring systems, and other indoor positioning services. There are several publications and commercial applications in step counting. Nevertheless, over-counting, under-counting, and false walking…
Osman Darici, Chanel Cabak, Jeremy D Wong
Functional gait assessments in older adults have traditionally required manual in-person quantification of clinically-relevant metrics such as walking speed and step placement. This reliance on individuals trained in motion analysis hinders the frequency with which they are performed, and reduces their generalizability…
Osman Darici, Chanel Cabak, Jeremy D Wong
Functional gait assessments in older adults have traditionally required manual in-person quantification of clinical measures such as walking speed and step placement. This reliance on individuals trained in motion analysis hinders the frequency with which they are performed, and reduces their generalizability and…
Meng Jia, Troy Sorensen, Dorit Hammerling
We propose a generic, modular framework to optimize the placement of continuous monitoring sensors on oil and gas sites aiming to maximize the methane emissions detection efficiency. Our proposed framework substantially expands the problem scale compared to previous related studies and can be adapted for different…
Jinrae Kim, Sunggoo Jung, Sung-Kyun Kim, Youdan Kim + 1 more
'Ali‐akbar Agha‐mohammadi'] Abstract— A staircase localization method is proposed for robots to explore urban environments autonomously. The proposed method employs a modular design in the form of a cascade pipeline consisting of three modules of stair detection, line segment detection, and stair localization modules.…
Prasanna Sriganesh, Namya Bagree, Bhaskar Vundurthy, Matthew Travers
— Robotic systems need advanced mobility capabilities to operate in complex, three-dimensional environments designed for human use, e.g., multi-level buildings. Incorporating some level of autonomy enables robots to operate robustly, reliably, and efficiently in such complex environments, e.g., automatically "returning…
Vinicius Cavassano Zampier, Morten Bilde Simonsen, Fabio Augusto Barbieri, Anderson Souza Oliveira
Gait events (i.e., heel strikes and toe-offs) are essential for extracting spatiotemporal parameters and segmenting biological signals. While force platforms and optical motion capture (OMC) are ideal for identifying such events, inertial measurement units (IMUs) are cheaper and more applicable, especially for…
William Daniels, Meng Jia, Dorit Hammerling
We propose a generic, modular framework for methane emission event detection, localization, and quantification on oil and gas production sites that uses concentration and wind data collected by point-in-space continuous monitoring systems. The framework uses a gradient-based spike detection algorithm to estimate…
Luiza Wasiewska, Ian Seymour, Vuslat Juska, Kaye Burgess + 2 more
Escherichia coli (E. coli) are a group of bacteria, which are a natural part of the intestinal flora of warm-blooded animals, including humans. Most E. coli are non-pathogenic and are essential for the normal function of a healthy intestine, however, certain types such as Shiga toxin-producing E. coli (STEC) is a…
Andrew J Harvie, Surendra K Yadav, John C de Mello
We report a sensitive, fixed-wavelength, lock-in-based optical detector built from a light-emitting diode, two colour filters, a photodetector, a small number of discrete analogue components, and a low-cost microcontroller development board. We describe the construction, operating principle, use and performance of the…