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Source: Sensors

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Total 1478 results found since Jan 2013.

Sensors, Vol. 15, Pages 30093-30103: GNSS Single Frequency, Single Epoch Reliable Attitude Determination Method with Baseline Vector Constraint
For Global Navigation Satellite System (GNSS) single frequency, single epoch attitude determination, this paper proposes a new reliable method with baseline vector constraint. First, prior knowledge of baseline length, heading, and pitch obtained from other navigation equipment or sensors are used to reconstruct objective function rigorously. Then, searching strategy is improved. It substitutes gradually Enlarged ellipsoidal search space for non-ellipsoidal search space to ensure correct ambiguity candidates are within it and make the searching process directly be carried out by least squares ambiguity decorrelation algori...
Source: Sensors - December 2, 2015 Category: Biotechnology Authors: Ang GongXiubin ZhaoChunlei PangRong DuanYong Wang Tags: Article Source Type: research

Sensors, Vol. 16, Pages 102: Drivers’ Visual Behavior-Guided RRT Motion Planner for Autonomous On-Road Driving
This paper describes a real-time motion planner based on the drivers’ visual behavior-guided rapidly exploring random tree (RRT) approach, which is applicable to on-road driving of autonomous vehicles. The primary novelty is in the use of the guidance of drivers’ visual search behavior in the framework of RRT motion planner. RRT is an incremental sampling-based method that is widely used to solve the robotic motion planning problems. However, RRT is often unreliable in a number of practical applications such as autonomous vehicles used for on-road driving because of the unnatural trajectory, useless sampling, and slow ...
Source: Sensors - January 15, 2016 Category: Biotechnology Authors: Mingbo DuTao MeiHuawei LiangJiajia ChenRulin HuangPan Zhao Tags: Article Source Type: research

Sensors, Vol. 16, Pages 194: Validity of the Kinect for Gait Assessment: A Focused Review
In conclusion, the Kinect may have the potential to be used as a tool for measuring spatiotemporal aspects of gait, yet standardized methods should be established, and future examinations with both healthy subjects and clinical participants are required in order to integrate the Kinect as a clinical gait analysis tool.
Source: Sensors - February 4, 2016 Category: Biotechnology Authors: Shmuel SpringerGalit Yogev Seligmann Tags: Review Source Type: research

Sensors, Vol. 16, Pages 979: Parameters Identification of Fluxgate Magnetic Core Adopting the Biogeography-Based Optimization Algorithm
The main part of the magnetic fluxgate sensor is the magnetic core, the hysteresis characteristic of which affects the performance of the sensor. When the fluxgate sensors are modelled for design purposes, an accurate model of hysteresis characteristic of the cores is necessary to achieve good agreement between modelled and experimental data. The Jiles-Atherton model is simple and can reflect the hysteresis properties of the magnetic material precisely, which makes it widely used in hysteresis modelling and simulation of ferromagnetic materials. However, in practice, it is difficult to determine the parameters accurately o...
Source: Sensors - June 24, 2016 Category: Biotechnology Authors: Wenjuan JiangYunbo ShiWenjie ZhaoXiangxin Wang Tags: Article Source Type: research

Sensors, Vol. 16, Pages 1043: A Wireless Sensor Network with Soft Computing Localization Techniques for Track Cycling Applications
In this paper, we propose two soft computing localization techniques for wireless sensor networks (WSNs). The two techniques, Neural Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN), focus on a range-based localization method which relies on the measurement of the received signal strength indicator (RSSI) from the three ZigBee anchor nodes distributed throughout the track cycling field. The soft computing techniques aim to estimate the distance between bicycles moving on the cycle track for outdoor and indoor velodromes. In the first approach the ANFIS was considered, whereas in the second approach the AN...
Source: Sensors - August 5, 2016 Category: Biotechnology Authors: Sadik Gharghan Rosdiadee Nordin Mahamod Ismail Tags: Article Source Type: research

Sensors, Vol. 16, Pages 1550: Design and Implementation of Sound Searching Robots in Wireless Sensor Networks
A sound target-searching robot system which includes a 4-channel microphone array for sound collection, magneto-resistive sensor for declination measurement, and a wireless sensor networks (WSN) for exchanging information is described. It has an embedded sound signal enhancement, recognition and location method, and a sound searching strategy based on a digital signal processor (DSP). As the wireless network nodes, three robots comprise the WSN a personal computer (PC) in order to search the three different sound targets in task-oriented collaboration. The improved spectral subtraction method is used for noise reduction. A...
Source: Sensors - September 20, 2016 Category: Biotechnology Authors: Lianfu Han Zhengguang Shen Changfeng Fu Chao Liu Tags: Article Source Type: research

Sensors, Vol. 16, Pages 2138: Estimation of Full-Body Poses Using Only Five Inertial Sensors: An Eager or Lazy Learning Approach?
Human movement analysis has become easier with the wide availability of motion capture systems. Inertial sensing has made it possible to capture human motion without external infrastructure, therefore allowing measurements in any environment. As high-quality motion capture data is available in large quantities, this creates possibilities to further simplify hardware setups, by use of data-driven methods to decrease the number of body-worn sensors. In this work, we contribute to this field by analyzing the capabilities of using either artificial neural networks (eager learning) or nearest neighbor search (lazy learning) for...
Source: Sensors - December 14, 2016 Category: Biotechnology Authors: Frank Wouda Matteo Giuberti Giovanni Bellusci Peter Veltink Tags: Article Source Type: research

Sensors, Vol. 17, Pages 105: Pruning-Based Sparse Recovery for Electrocardiogram Reconstruction from Compressed Measurements
Due to the necessity of the low-power implementation of newly-developed electrocardiogram (ECG) sensors, exact ECG data reconstruction from the compressed measurements has received much attention in recent years. Our interest lies in improving the compression ratio (CR), as well as the ECG reconstruction performance of the sparse signal recovery. To this end, we propose a sparse signal reconstruction method by pruning-based tree search, which attempts to choose the globally-optimal solution by minimizing the cost function. In order to achieve low complexity for the real-time implementation, we employ a novel pruning strate...
Source: Sensors - January 6, 2017 Category: Biotechnology Authors: Jaeseok Lee Kyungsoo Kim Ji-Woong Choi Tags: Article Source Type: research

Sensors, Vol. 17, Pages 146: The Clinical Benefits and Accuracy of Continuous Glucose Monitoring Systems in Critically Ill Patients—A Systematic Scoping Review
In conclusion, studies on the efficacy and accuracy were heterogeneous and difficult to compare. There was no consistent clinical benefit in the small number of studies available. Overall accuracy was moderate to good with some intravascular devices. CGM systems seemed however safe, and might positively affect workload and costs.
Source: Sensors - January 13, 2017 Category: Biotechnology Authors: Sigrid van Steen Saskia Rijkenberg Jacqueline Limpens Peter van der Voort Jeroen Hermanides J. DeVries Tags: Review Source Type: research

Sensors, Vol. 17, Pages 921: A New Method for Single-Epoch Ambiguity Resolution with Indoor Pseudolite Positioning
Ambiguity resolution (AR) is crucial for high-precision indoor pseudolite positioning. Due to the existing characteristics of the pseudolite positioning system, such as the geometry structure of the stationary pseudolite which is consistently invariant, the indoor signal is easy to interrupt and the first order linear truncation error cannot be ignored, and a new AR method based on the idea of the ambiguity function method (AFM) is proposed in this paper. The proposed method is a single-epoch and nonlinear method that is especially well-suited for indoor pseudolite positioning. Considering the very low computational effici...
Source: Sensors - April 21, 2017 Category: Biotechnology Authors: Xin Li Peng Zhang Jiming Guo Jinling Wang Weining Qiu Tags: Article Source Type: research

Sensors, Vol. 17, Pages 2063: A Tailored Ontology Supporting Sensor Implementation for the Maintenance of Industrial Machines
Bernard The longtime productivity of an industrial machine is improved by condition-based maintenance strategies. To do this, the integration of sensors and other cyber-physical devices is necessary in order to capture and analyze a machine’s condition through its lifespan. Thus, choosing the best sensor is a critical step to ensure the efficiency of the maintenance process. Indeed, considering the variety of sensors, and their features and performance, a formal classification of a sensor’s domain knowledge is crucial. This classification facilitates the search for and reuse of solutions during the design of a new ...
Source: Sensors - September 8, 2017 Category: Biotechnology Authors: Elaheh Maleki Farouk Belkadi Mathieu Ritou Alain Bernard Tags: Article Source Type: research

Sensors, Vol. 17, Pages 2681: A Lightweight Anonymous Authentication Protocol with Perfect Forward Secrecy for Wireless Sensor Networks
hicai Liu Due to their frequent use in unattended and hostile deployment environments, the security in wireless sensor networks (WSNs) has attracted much interest in the past two decades. However, it remains a challenge to design a lightweight authentication protocol for WSNs because the designers are confronted with a series of desirable security requirements, e.g., user anonymity, perfect forward secrecy, resistance to de-synchronization attack. Recently, the authors presented two authentication schemes that attempt to provide user anonymity and to resist various known attacks. Unfortunately, in this work we shall sh...
Source: Sensors - November 21, 2017 Category: Biotechnology Authors: Ling Xiong Daiyuan Peng Tu Peng Hongbin Liang Zhicai Liu Tags: Article Source Type: research

Sensors, Vol. 18, Pages 119: A Novel Residual Frequency Estimation Method for GNSS Receivers
ng Ta In Global Navigation Satellite System (GNSS) receivers, residual frequency estimation methods are traditionally applied in the synchronization block to reduce the transient time from acquisition to tracking, or they are used within the frequency estimator to improve its accuracy in open-loop architectures. There are several disadvantages in the current estimation methods, including sensitivity to noise and wide search space size. This paper proposes a new residual frequency estimation method depending on differential processing. Although the complexity of the proposed method is higher than the one of traditional ...
Source: Sensors - January 4, 2018 Category: Biotechnology Authors: Tu Nguyen Vinh La Tung Ta Tags: Article Source Type: research

Sensors, Vol. 18, Pages 561: Force Modeling, Identification, and Feedback Control of Robot-Assisted Needle Insertion: A Survey of the Literature
ong Sun Robot-assisted surgery is of growing interest in the surgical and engineering communities. The use of robots allows surgery to be performed with precision using smaller instruments and incisions, resulting in shorter healing times. However, using current technology, an operator cannot directly feel the operation because the surgeon-instrument and instrument-tissue interaction force feedbacks are lost during needle insertion. Advancements in force feedback and control not only help reduce tissue deformation and needle deflection but also provide the surgeon with better control over the surgical instruments. The ...
Source: Sensors - February 12, 2018 Category: Biotechnology Authors: Chongjun Yang Yu Xie Shuang Liu Dong Sun Tags: Review Source Type: research

Sensors, Vol. 18, Pages 1123: Signal Quality Improvement Algorithms for MEMS Gyroscope-Based Human Motion Analysis Systems: A Systematic Review
dén Motion sensors such as MEMS gyroscopes and accelerometers are characterized by a small size, light weight, high sensitivity, and low cost. They are used in an increasing number of applications. However, they are easily influenced by environmental effects such as temperature change, shock, and vibration. Thus, signal processing is essential for minimizing errors and improving signal quality and system stability. The aim of this work is to investigate and present a systematic review of different signal error reduction algorithms that are used for MEMS gyroscope-based motion analysis systems for human motion analysis...
Source: Sensors - April 6, 2018 Category: Biotechnology Authors: Jiaying Du Christer Gerdtman Maria Lind én Tags: Review Source Type: research