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Coriolis flowmeters are commonly used to measure single phase flow. In recent years attempts are being made to apply Coriolis flowmeters to measure two-phase flows. This paper presents a neural network based approach that has been applied to Coriolis flowmeters to measure both the liquid flow rate and the gas volume fraction of a two-phase flow. Experimental tests were conducted on a purpose-built...
As a critical component of high-speed locomotive, wheel set bearing fault identification and prognosis based on vibration analysis has attracted an increasing attention in recent years. However, heavy background noise and adverse working conditions make it difficult to excavate the hidden weak fault feature. Variational Mode Decomposition (VMD), which can extract the Intrinsic Mode Functions from...
The pupil response to light can reflect various kinds of neural diseases, and different response for two eyes can be analyzed relative afferent pupillary defect. This study presents the novel wearable pupillometer for recording the pupil response and designs the experiment for verifying the synchronization of two cameras. Compared with other devices, the main feature of this study is proven reliable,...
A new circuit-based method for performance evaluation of mid-range wireless power transfer links is presented. The characterization is based on the measurement of selected node voltages, which allows to define the performance of the link in terms of its efficiency, output power, and mutual inductance. The main feature of the proposed method is that it can be applied to wireless power transfer systems...
Accurate skin degree-of-burn assessment is critically important and can assist burn technicians and physicians to make appropriate treatment decisions. Millimeter wave imaging is a potential diagnosis tool capable of distinguishing between healthy and burned skin as the dielectric properties of the latter is significantly different from that of the former. In this paper, the layered model of human...
Accurate non-destructive online measurement is more and more important to control and optimize the complex industrial process. In this paper, a MFI (multisensory fusion and integration) system design and its applications in Pulp and Paper, Mining and Lumber Board Drying are presented. The MFI refers to the synergistic combination of sensory data from multiple sensors to provide more reliable and accurate...
Image super-resolution technique mainly aims at restoring high-resolution image with satisfactory novel details. In recent years, sparsity-based super-resolution has attracted great interests for its impressive results. By using learning dictionaries, sparsity-based methods try to find some mapping relationships as prior knowledge between low- and high-resolution example images for better reconstruction...
In this paper, a near-infrared spectroscopy instrument adapted for in-vivo NIRS measurements of rodent's brain is presented. This prototype was designed for non-invasive analysis of the two main forms of hemoglobin: oxy-hemoglobin and deoxy-hemoglobin. These two chromophores are markers of the degree of tissue oxygenation, thus providing an index of blood levels and therefore of brain metabolism....
In order to improve the classification accuracy of hyperspectral image, its internal relations and mutual relations should be paid attention to. This paper proposes a compound non-linear dimensionality reduction method with the help of non-negative matrix factorization (NMF) to show the relationships between samples within the same class and locality preserving projections (LPP) to show the relationships...
Based on the heat transfer theory, a new gas flow measurement with wide range is proposed. Firstly, the structure of the sensor is simulated by the software of FLUENT and the optimal size of the sensor is determined by the method of Weighting. Secondly, the temperature characteristics of the sensing element are studied so as to automatically compensate error caused by gas temperature. Finally, the...
In modern communication networks, Voice over IP (VoIP) users are even more interested to quantify the quality experienced in a VoIP call. This practice very often addresses the common need of rating the service of a telecommunication provider. To this aim, international standard committees have defined suitable metrics at application layer of the ISO/OSI protocol stack. Unfortunately, the evaluation...
A rapid displacement sensor with a varifocal lens based on a method of fitting scan is proposed for 3D surface profiling. The focal length of the varifocal lens can be adjusted by varying the driving current. By detecting the reflective power of the reflected laser, the displacement can be obtained. By integrating a LabVIEW program based on a Levenberg-Marquardt algorithm in this system, the measuring...
In order to improve the image reconstruction quality of electromagnetic tomography (EMT), a new EMT image reconstruction method based on finite rate of innovation (FRI) is put forward in this paper. The FRI sampling process is used to extract the feature information and combined a new measurement equation. Firstly, the conductivity distribution of the target object inside pipeline is modeled as an...
Electrical capacitance tomography (ECT) is considered as one of the tomography techniques with a broad developing prospect owning to the distinct advantages such as low cost, non-invasive and high safety. However, the image reconstruction in ECT is an ill-posed and nonlinear problem. In order to relieve the non-linearity of ECT system, this paper proposed a self-adapting Landweber (SAL) algorithm...
A detailed characterization of 3D-MEMS based tilt sensors, i.e. inclinometers, is presented. This revealed that the perturbations in the tilt signal is best modeled by a Cauchy-Lorentz distribution, this is a previously unreported behavior. A new data fusion procedure is presented which merges the data form reference measurements with a reconstruction from the inclinometer values. This procedure uses...
This paper presents a study of Internal Model Control (IMC) scheme to improve control performance of industrial wireless networked control system subject to measured round trip delays. As compared to the auto-tuned optimized PID controller, IMC controller helps to significantly reduce percentage of overshoot for a first order with dead-time process plant. The paper also highlights the differences...
This paper highlights the importance of describing the cyclostationary (CS) phenomena in (tele) communication systems by observing and characterizing the behavior of signal(s) at the output of the considered system. Various circuit blocks in (tele) communication systems such as frequency converters, samplers and oscillators have a periodically time varying nature. Stochastic signals generated and...
Wireless sensor networks have found their way into a wide range of applications among which environmental monitoring systems have attracted increasing interests of researchers. The main challenges for the applications are scalability of the network size and energy efficiency of the spatially distributed motes. These devices are mostly battery-powered and spend most of their energy budget on the radio...
The rise of Internet of Things (IoT) has impacted the industrial automation world. Traditional fleldbus and new fieldbus based on Real Time Ethernet (as PROFINET) have been challenged to include IoT solutions, whose real possibilities are still under evaluation. On the other hand, there are properties of industrial automation devices (e.g. robustness, “proven in use”, explosion proof) that may be...
Power line communications (PLCs) have been used for a long time as a viable solution for implementing wired digital communications over high and medium voltage lines. They recently gained momentum also for low voltage lines, in order to integrate home area networks into smart grids. Despite obvious advantages, including low-cost, the communication channel robustness is low and most of commercially...
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