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The following topics are dealt with: sensors; image processing; measurements; transducers; calibration; noninvasive measurements; inverse problems; telecommunications; measurement uncertainty; digital signal processing; automated test systems; diagnostics systems; sensor networks; analog signals; mixed signals; soft computing; analog conversion; digital conversion; mathematical modeling; and sensor...
Sensing reliability is an important issue in wireless sensor networks because of the generally existing failures of sensor nodes. In this paper, we design a reputation-based method to assure sensing reliability for acoustic target location estimation. Sensor reputation is defined here as the probability that a node's measurement is trustable, i.e., reputation actually represents the sensing reliability...
The paper presents specific approach to the designing of the mobile measurement station using the quality engineering rules. Specific expectations of the market and engineers as well, for such equipment, need to find non standard approach to the design procedures. One of the most important part of this design is the central processing unit selection. Authors describe the selection procedure and final...
Cross-correlation methods in combination with electrostatic sensing technology offer a promising solution to the on-line continuous measurement of velocity of particulate solids in pneumatic pipelines. The sampling frequency and integral time are two fundamental parameters in cross-correlation calculation. This paper describes the principles and steps of the selection of these two parameters. The...
An electrical resistance tomography sensor consists of a set of measurement electrodes. In general, finite element method (FEM) is used to solve the forward problem (i.e. calculate the resistance value for a given conductivity distribution and electrodes setup). In this paper, a new approach is proposed. The equivalent resistor network model of an electrical resistance tomography (ERT) sensor has...
Coupling-induced oscillations are a feature that appears to be universal in coupled systems that are (individually) described by bi-or multi-stable potential energy functions U(x); these properties are being exploited in a new class of dynamical sensors being developed by us. Here, we describe one of these devices, a coupled core fluxgate magnetometer (CCFM), whose operation is underpinned by this...
This paper reports recent advances in the optimisation of intrusive electrostatic sensors for the continuous velocity measurement of particles in pneumatic conveying pipelines. The effects of electrode dimensions and intrusion depth on sensor signals and correlation based velocity measurement have been investigated. Different cross sectional shapes of the electrodes have been compared. The optimum...
An advanced automated calibration technique for a trimming inaccuracy (calibration tolerance) of low-cost quartz resonators that are using in the Universal Sensors and Transducers Interface (USTI) integrated circuits for precision frequency (period)-to-digital conversion is described in the paper. It was shown that such technique can be used also for reducing an error due to a quartz crystal aging...
Interdigital sensors have been successfully employed in various fields; in this paper we attempted to determine the looseness in sheep skins using interdigital sensors. Looseness is one of the quality attributes that determines the value of the leather. A low cost interdigital based sensing system with an effective data acquisition system has been designed.
Time-of-Flight sensors have recently become available at reasonable prices. In comparison to stereo vision system and laser range scanners they combine the advantages of active sensors providing accurate distance measurements and camera-based systems recording a 2D matrix at a high frame rate. Moreover low cost 3D imaging has the potential to open a wide field of additional applications and solutions...
In this study, an experimental setup for a noncontacting high speed thickness measurement of planar objects is constructed. A simple calibration procedure is introduced and performance of the measurement setup is characterized. The setup includes two industrial cameras and two stripe lasers installed on opposite sides of the planar object. For a demonstration and characterization of the system, a...
During the last few decades a growing interest in monitoring and preserving strategic heritage and civil structures, has pushed the research towards the development of new devices and strategies for measuring the quantities of interest. The measuring strategies, based on innovative transducers, are required to avoid any significant influence on the monitored structure either in terms of functionality...
A new procedure to estimate the value of the individual components of a two-terminal impedance network is presented. It is based on the application of genetic algorithms to the spectral fitting of the impedances' model. The expanded uncertainty of the estimated parameters is obtained through simulations and the algorithm is also applied to the measured frequency response of two impedance networks...
On-line measurement of physical parameters of solution means a great deal in the osmotic dehydration process of food. Ternary solution with NaCl and sucrose is widely employed in this process. This study aims at reconstructing concentrations of two components and estimating density, viscosity of this ternary solution with multifunctional sensing technique in which the multifunctional sensor was previously...
A novel planar interdigital sensor based sensing and instrumentation system has been developed for detection of dangerous contaminated chemicals in seafood. Three novel interdigital sensors have been designed and fabricated. The sensors were designed with different configurations and analyses of all sensors were conducted from the experiments in order to select the best sensor for further analysis...
This paper presents the latest development in the velocity measurement of pulverized coal and biomass fuels in pneumatic pipelines using electrostatic sensors in combination with correlation signal processing techniques. A comparative study of electrostatic sensors with circular and rod electrodes was conducted on a 94mm bore horizontal pipeline feeding a 4 MW industrial scale furnace. Experimental...
The instrumentation technologies required to achieve optimized combustion in pulverized fuel power plants represent an important challenge under increasing economical and environmental pressures. The present paper reports on the final results of a British government funded project to bring together various new and emerging sensing technologies aimed at achieving this goal. Both fuel flow and burner...
Quality control, cost reduction and above all, human and environmental safety are great reasons that stimulate the investments in technologies like automatic inspection. The automatic inspection of weld lines in storage tanks is of special interest, due to the fact that such tanks are currently used to store harmful products. For a reliable inspection it is necessary to accurate detect the weld line...
In this paper, a new view planning algorithm of generating 3-D models automatically is presented. It is realized based on the trend surface of the visual field and limit visual region of the vision system. The candidate next best view (NBV) position is obtained by computing the unknown space area according to the trend surface of the acquired the object surface information and limit region of the...
Under Balanced Drilling Process (UBD) is a drilling technique that is usually used as a remedy for the drawbacks of the Over Balanced Drilling (OBD) processes. It is an unconventional drilling procedure which adds the ability of production from the reservoir while drilling and reducing or total elimination of formation damage from the drilling fluid as well as faster drilling rates. Faster drilling...
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