The sensor is the front-end component of bridge structural health monitoring system. In this study, three fault diagnosis methods based on principal element analysis are applied to a diagnostic results show that significant differences among operating conditions will deteriorate robustness methods. applicability method verified practical

In this paper, we describe the design, fabrication and calibration results of a 6-degree of freedom force-moment micro sensing chip utilizing the piezoresistance effect in silicon. The sensing chip is designed to be able to simultaneously detect three components of force and three components of moment in three orthogonal directions. Conventional p-type and four-terminal p-type piezoresistors ha...

Nowadays, there is an increasing number of robotic applications that need to act in real three-dimensional (3D) scenarios. In this paper we present a new mobile robotics orientated 3D registration method that improves previous Iterative Closest Points based solutions both in speed and accuracy. As an initial step, we perform a low cost computational method to obtain descriptions for 3D scenes p...

Sensors have been increasingly used for many ubiquitous computing applications such as asset location monitoring, visual surveillance, and human motion tracking. In such applications, it is important to place sensors such that every point of the target area can be sensed by more than one sensor. Especially, many practical applications require 3-coverage for triangulation, 3D hull building, and ...

Resource aware operation of sensor networks requires adaptive re-organization to dynamically adapt to the operational environment. A complex dynamical system of interacting components (e.g., computer network and social network) is represented as a graph, component states as spins, and interactions as ferromagnetic couplings. Using an Isinglike model, the sensor network is shown to adaptively se...

We have developed a noncontact proximity sensor which can measure the distance and orientatiorr of a surface in a range of four to jive centimeters. The sensor is based on the scheme of active illumination and triangulation It uses multiple infrared LEDs as the light sources and a PIN-diode area sensor chip f i r detecting the spot positions. Six LEDs with optics for collimating the beam are mo...

in this research by applying the theoretical framework of socio-technical systems and literature review using the form of e-government has been identified as a core component. to realize the model results and the results indicated that each of the six components of e-government in 1404 particularly in the areas of communication and access to digital content. based on the results of the highest ...

This paper considers the problems of sensor data publication, taking advantage of research on components and Web service standards. Sensor data is widely used in scientific experiments – e.g., for model validation, environment monitoring, and calibrating running applications. Heterogeneity in sensing devices hamper effective use of their data, requiring new solutions for publication mechanisms....