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Many researches have proved the significance of gait analysis since it strongly relates to several urgent health issues. As a response, we develop an unobtrusive sensor device, named SennoGait, which provides comprehensive gait information. In this paper, we verify the robustness and reliability of the device's hardware components, including a 16 pressure sensors array and a 9-axis inertial measurement...
A nonlinear model of a flapping-wing micro aerial vehicle (MAV) is built in which the load acceleration and equivalent moment are formulated linearly in the body frame. The aerodynamic force and moment are not considered directly because the mass and moment of inertia of the flapping-wing MAV are too tiny. The visual measurement system (VMS) is taken to measure the flight data such as the position...
Being instrumental in electric energy data collection for energy data collection and supervisory systems, the reliability of an electric energy collector not only affects the reliability of the system, but also directly influences users' satisfaction. With the objective of addressing the problem of reliability assessment of an electric energy data collector, the failure mechanism of the data collector...
The importance of detecting falls in real-time is more and more emphasized recently. In this paper, we develop a real-time fall detection system on the smartphone. It is based on our low-complexity fall detection algorithm [1] that can detect the fall after the fall event happens. The system can distinguish dangerous falls by setting a monitoring time. The system is implemented on the Android platform...
Fall accidents cause severe damage to health, sometimes even mortality in older adults. With the increasing number of the elderly suffering from fall events, wearable products are in great demand. However, most of them for fall detection have difficulty in reducing false positive caused by fall-alike activities. In this study, we focus on evaluating the accuracy of fall detection among a set of fall-alike...
It is predicted that fifty billion sensor-based devices are to be connected to the Internet by 2020 with the fast development of Internet of Things (IoT). Stream data mining on these tremendous sensor-based devices has become an urgent task. Dynamic time warping (DTW) is a popular similarity measure, which is the foundation of stream data mining. In the last decade, DTW has been well accelerated with...
In this paper, we present a vision-based relative sensing system for UAVs to realize leader-follower formation flight without inter-vehicle communication. A monocular camera is mounted on the follower to detected the leader and measure the relative distance by using the geometry information of the leader without artificial markers. The measured relative distance is utilized to estimate the velocity...
A method for analyzing wind-induced vibrations of 1000kv Hanjiang ultrahigh voltage long span power transmission towers coupled with power lines is discussed in this paper. This paper also discusses the influence on response characteristics of differences in transmission support systems and differences between peak factors, computed from a time-series and from power spectrum density. Through the analysis...
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