The departure from the current automation landscape to next generation automation concepts for the process industry has already begun. Smart functions of sensors simplify their use and enable plug-and-play integration, even though they may appear to be more complex at first sight. Smart sensors enable concepts like self-diagnostics, self-calibration, and self-configuration/parameterization when...

The global positioning system (GPS) has found application in many different fields, in areas where there is a good line-of-sight (LoS) to GPS satellites, this technique provides a good estimate of the location of user terminal (UT). However, in indoor and dense urban environments, localization has always been a more challenging problem for several reasons. Typically the GPS signal is not strong...

Accurate calibration is imperative to obtain reliable flow measurements using hot-wire anemometry. Calibration errors owing to temperature drift, wire degradation, changes in ambient conditions etc can lead to substantial uncertainties in hot-wire measurements. A new calibration procedure is implemented here to account for most forms of drift that are typically encountered during high quality f...

An Informal Memo by Wayne Olson .....................................................................1 Déjà vu – I’ve seen this before:.............................................................................

The Sky Net project proposes a mobile base transceiver station (BTS) for mobile communication service from airborne. In the preliminary study, a Microwave AirBridging (MAB) system is established on an Ultra-Light Aircraft (ULA) to offer relay mobile communication. In order to maintain sufficient Quality of Service (QoS) data-link, microwave system needs to establish critical Line-of-Sight (LoS)...

Manual search of project information on construction sites is a tedious and timeconsuming process. Evolving technologies such as location-aware computing offer significant potential of improving such processes and supporting important decision-making tasks in the field. For example, rapid and convenient access to contextual project information, through continuous position tracking of engineers,...

GPS vector receive make the tasks of signal tracking and navigation state estimation are integrated into an algorithm which can complement traditional scalar receiver tracking independent and parallel tracking disadvantage. Through integration with INS, the GPS signal in jamming or weak environment based on vector tracking ultra-tightly coupled GNSS/INS integration system has significant advant...

Ultra-wideband (UWB) radio is a new carrierless communication scheme using impulses and is a candidate technology for future communication and ranging applications. In this paper, we consider the problem of node localizing in ad-hoc networks ,in which positioning algorithm only exploits the high precision ranging capabilities offered by UWB and does not rely on GPS. A Time-of-Arrival (ToA) base...

In the indoor and outdoor transition area, due to its poor availability in a complex positioning environment, BDS/GPS SPP (single-point by combining BeiDou Navigation Satellite System (BDS) Global Positioning (GPS)) is unable provide an effective service. view of accuracy low sampling rate gross error, such as non-line-of-sight error UWB (Ultra-Wide-Band), making results poor, BDS/GPS/UWB tight...

We propose Direct Position Estimation (DPE) utilizing non-line-of-sight (NLOS) GPS signals for urban navigation. In urban environments, buildings reflect GPS signals, leading to reception of NLOS GPS signals. In addition, buildings obstruct GPS signals, resulting in reduced GPS signal availability. We treat NLOS GPS signals as additional line-of-sight (LOS) GPS signals to virtual satellites at ...