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The presence of electrostatic charge in a bubbling fluidized bed influences the operation of the bed. In order to maintain an effective operation, the electrostatic charges in different positions of the bed should be monitored. In this paper a wire-mesh electrostatic sensor is introduced to reconstruct the charge distribution in a bubbling fluidized bed. The wire-mesh sensor is fabricated by two mutually...
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Pressure sensitive mats provide an opportunity for non-intrusive continuous monitoring of patient health and physiology. Pressure sensitive mats have been used to analyze balance, bed transfers, pressure ulcers and sleep. This paper describes a model that can be used to measure the characteristics of pressure sensitive mats. The main contribution of this paper is the design and fabrication of a 2D...
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In this paper, we proposed a imitated light field image architecture based on Haar discrete wavelet transform for light field instrument. We can get different characteristic from subband images by using discrete wavelet transform (DWT) decomposition. Each subband contains different energy and edge type. The image is composed of many subbands by using high-order discrete wavelet transform and makes...
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For exploring and researching the mechanism of the GNSS/SINS ultra-tightly integrated navigation system, an efficient tool is critical to evaluate the performance of the design. In this paper, a design of distributed GNSS/SINS ultra-tightly integrated navigation system is implemented by VC++ and Matlab mixed programming which brings a low-cost and flexible approach to evaluate the performance of the...
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Micro-oxygenation processes that happen while aging wine in barrels give the necessary final traits to reach quality and determine the wine aging rates. The measurement of oxygen transfer rates across wood and the oxygen distribution within the wood can provide data on the kinetics of the oxygen dosage by wine barrels. Previous attempts at measurement with electrochemical probes achieved the required...
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It is important to get reliable measurement data in Electrical impedance tomography (EIT) for getting satisfactory reconstruction result. Because EIT inverse problem is non-linear and ill-posed, incorrect data such as measured data through fault electrode can effect the estimation of resistivity distribution. So, EIT measurement system with methods for checking reliability has been developed. However,...
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Voltage measurement is critical in power system and optic-voltage sensing is one of the promising ways. However, optical voltage sensors can be easily influenced by the environmental conditions in application, such as temperature, stress etc. In this paper, some methods to improve sensing stability are introduced and further challenges are analyzed. Thermal stress distribution in the sensing crystal...
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In this study, the Pt thin films were deposited on the quartz substrate at 300oC by ALD using MeCpPtMe3 and oxygen as precursors. The in-situ resistance of Pt film during ALD reaction was measured by four-point probe resistance measurement. When the ALD cycle number exceeded 80, the resistance dropped rapidly from 107 ohm to nearly 400 ohm, indicating that the resistance gets smaller by a factor of...
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Effects of increasing the numbers of views and spectral lines on hyperspectral temperature distribution tomography is compared in this paper via numerical experiments. The theory of multi-view hyperspectral temperature tomography is introduced mathematically, and some basic principles are explained. Given a bimodal Gaussian distribution, simulation results are obtained by changing the numbers of views...
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Alkali-activated fly ash geopolymers are structural materials that can be used as a sustainable alternative to ordinary portland cement concrete in infrastructure applications. However, the widespread use of geopolymers by the construction industry has been limited in part by a lack of understanding about the fundamental reaction mechanisms that occur during their formation. Since microwave signals...
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Initial voltage step in the input of an SC amplifier is a major cause of nonlinearity. This paper presents methods to quickly estimate the initial voltage step as the aim is to reduce it by proper pre-charging the load capacitance. Three methods of calculating the initial voltage are presented and compared, and a linear state model is capable of modeling the effects of switch on resistance and the...
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Crack marking in RC experiments is not only a labor intensive job but also carries a certain level of risk. Some cracks are too thin to be detected by edge-detection based methods. Public available image analysis software ImPro Stereo developed by the authors of this paper estimates the surface deformation by using image analysis. New formula has been added into ImPro Stereo in this work to estimate...
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The replica consistency detection of text images is of great significance in office automation. For example, it can be applied to detect the consistency of the printed documents of commercial contracts and the original electronic documents. In this paper, we propose a method for replica consistency detection of text images based on multi-feature assessment. Firstly, we make a photocopy of the printed...
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This paper presents a signal reconstruction algorithm for sequential equivalent time sampling (SETS). SETS has been incorporated in digital acquisition system to capture a repetitive waveform with a single analog to digital converter (ADC) clocked at a rate that is much lower than the signal's Nyquist rate. However, in order to achieve a high time resolution, a great number of acquisition runs need...
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This paper evaluates Compressed Sensing (CS) techniques for image recovery from sparse measurement of wideband microwave synthetic aperture radar. A specimen under test (SUT) consists of a tray of small rocks of different densities and with/without one piece that is wrapped in aluminum foil. The fully-sampled measurements of the SUT are randomly under-sampled in the space domain and the images are...
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A precision angle measurement system, also called autocollimator, is a precise module at optical testing or fabricating system. A precision angle measurement system can be measured straightness of guideway, accuracy of rotating platform, parallel and decentered of optical components. Instrument Technology Research Center (ITRC), National Applied Research Laboratories (NARLabs) develops precise opto-mechanical...
