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In this paper the elimination of image distortion and subsequent estimation of intrinsic camera parameters, while extracting the real object dimensions from photographs is presented. Research analysis includes description of the basic concepts related to the camera calibration. Following the analysis, the most suitable calibration method has been chosen and implemented as a software solution. The...
While compression therapy is the cornerstone in managing leg venous disorders, the applied pressure has to be in specific ranges in order to have an effective treatment. Medical bandages and compression stockings lack an embedded pressure measurement system. The listed class of compression for medical stockings is not utterly reliable, and achieving desired pressure profiles in medical bandages is...
This work proposes a low cost calibration method for micro-electro-mechanical inertial (MEMS) gyroscopes, using a camera pan-tilt base. The use of MEMS gyroscopes in practical robotics measurements requires preliminary calibration. Three calibration procedures are currently found in the literature to estimate the sensor calibration parameters which are based on static, quasi-static and dynamic measurements...
This paper introduces a first-order noise-shaped time-domain ADC utilizing SAR-TDC as quantizer. The high resolution correlated double sampling SAR-TDC improves the quantization noise level of the ADC. The VCO non-linearity is resolved by employing a 1-bit folded VCO architecture. The ADC linearity is further improved using foreground digital calibration. Implemented in 65nm CMOS, the 675MS/s time-domain...
A new topology of piezoresistive pressure sensor signal conditioner based on the alternative current loop is proposed. The optimal procedure for model parameter estimation based on the maximum likelihood method is described. The convenient calibration technique of the sensor system that enables to simplify the necessary calculations drastically is offered. The results of computer simulation confirming...
Microwave-induced plasma optical emission spectrometry (MIP OES) and a simple dilute-and-shoot sample preparation procedure with 1-propanol are used to determine Ca, K, Mg and Na in biodiesel fuel. MIP naturally occurring molecular species are used to probe plasma condition variations during sample introduction, and then correct analytical signals to improve accuracies. The electronic transitions...
A comprehensive observational sequence using the Deep Impact (DI) spacecraft instruments (consisting of cameras with two different focal lengths and an infrared spectrometer) will yield data that will permit characterization of the nucleus and coma of comet Tempel 1, both before and after impact by the DI Impactor. Within the constraints of the mission system, the planned data return has been optimized...
In this paper we described the development of both the hardware and the algorithms for a novel laser vision system suitable for measuring distances from both solid and mesh-like targets in underwater environments. The system was developed as a part of the AQUABOT project that developed an underwater robotic system for autonomous inspection of offshore aquaculture installation. The system takes into...
KLOE-2 at the e+e− DAφNE φ-factory is the main experiment of the INFN Frascati National Laboratories (LNF) and is the first high-energy experiment using the GEM technology with a cylindrical geometry, a novel idea that was developed at LNF exploiting the kapton properties to build a light and compact tracking system. Four concentric cylindrical triple-GEM detectors, for a total material budget below...
A first prototype of a readout ASIC in CMOS 65 nm for a pixel detector at High Luminosity LHC is described. The pixel cell area is 50×50 μm2 and the matrix consists of 64×64 pixels. The chip was designed to guarantee high efficiency at extreme data rates for very low signals and with low power consumption. Two different analogue front-end designs, one synchronous and one asynchronous, were implemented,...
The current paper is dealing with the use of a novel system that takes advantage of several sensors (Global Navigation Satellite System-GNSS, Inertial Measurement Units-IMU and Digital Imaging Sensors — DIS) that are integrated on a single platform to visualize and provide augmented pictures of underground infrastructure networks (electricity, water, district heating, irrigation, sewerage and communication...
We describe a new method for calibrating large phased arrays, namely the Mobile Fourier Gauge (MFG), that permits rapid calibration of large phased arrays on site, and removes the need for expensive near field facility testing. This calibration method has been demonstrated on a large S-Band phased array, and its accuracy validated.
Localization, a process of determining the position of a blind node, can be used in various applications. Signal-strength localization provides a low-cost and lowpower solution to positioning. Signal-strength positioning approaches using fingerprinting or calibrated approaches require a time-consuming calibration phase. Existing selfcalibrating approaches, which do not require a priori calibration,...
An AC power standard for high voltages and high currents for power frequencies is presented. It consists of commercially available components and is traceable to the primary standards of PTB. A dedicated correction algorithm automatically corrects the systematic errors of the components and leads to uncertainties in the order of 0.004 % of the active power for voltages up to 220 kV / V3 and up to...
With the growing interest in III-V-based nano-scale transistors as potential candidates for next-generation switches there is a need for efficient simulation tools capable to predict the impact of inherent quantum effects. In this paper we show how quantum drift-diffusion (QDD) models can be used to mimic those quantum effects. The models do not only properly account for geometrical confinement in...
Camera calibration is one of the essential components of a vision based tracking system where the objective is to extract three dimensional information from a set of two dimensional frames. The information extracted from the calibration process is significant for examining the accuracy of the vision sensor, and thus further for estimating its effectiveness as a tracking system in real applications...
In this paper, we illustrate how high resolution two-dimensional (2D) carrier maps obtained from scalpel scanning spreading resistance microscopy (s-SSRM) can be applied to calibrate a technology computer aided design (TCAD) simulator in order to predict and understand the performance of sub-10nm WFIN FinFETs. In the proposed approach, process simulations are calibrated such that the resulting simulated...
This paper presents a 12b 180 MS/s partial-interleaving Pipelined-SAR analog-to-digital converter (ADC). The 1st-stage is implemented with a 2b/cycle SAR ADC for high speed, where we propose a merged-residue-DAC technique to improve the noise performance. The capacitor pre-charging in conventional 2b/cycle operation wastes settling time and switching energy, while with this design approach the switching...
Partial discharge is measured simultaneously using free-space radiometry (FSR) and a galvanic contact measurement technique based on the IEC 60270 standard. Several types of PD (Partial Discharge) sources are specially constructed: two internal PD emulators and an emulator of the floating-electrode type. The excitation applied to the source is AC and the radiated signal is captured using a wideband...
La July 25th, 2013, the Alphasat satellite was launched, carrying a Component Technology Test-Bed (CTTB) to assess the space radiation damage in electronic components. Embedded, in each of the three experimental boards of the CTTB, are RADFETs to measure the radiation levels at the Alphasat geostationary orbit. In this work values of accumulated dose are presented for the RADFETs onboard the ALPHASAT...
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