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We introduce a novel combined temperature and conductivity needle probe measuring system for local void fraction measurements in two-phase flow experiments. The system is able to deal with direct sheathed micro thermocouples as well as open thermocouples. It consists of a thermo needle probe connected to a special electronic circuit using AC measuring technique for the conductivity measurements and...
The performance capabilities of high-voltage high-power systems are significantly impacted by the thermal limitations of power electronic components. To address this issue, numerous current research efforts have been conducted to examine advanced packaging materials and structures as well as novel cooling techniques. Critical to the success of this work is the accurate measurement and characterization...
The development of an indirect measurement model for electro thermal furnace and its implementation in a reconfigurable architecture are the main issues of this article. The proposed measurement system is based on the system model, the principle of conservation of energy and the laws of thermodynamics are applied to build a model of the thermal system and the Kalman theory is applied for filtering...
Infrared (IR) image sequences and physiological data (heart rate, blood pressure, blood oxygenation) were acquired in a well-controlled environment adhering to stringent experimental protocols from several test persons who chewed nicotine gums or smoked cigarettes. Task-optimized digital image processing techniques (registration, segmentation, morphological operations) were implemented in a MATLABtrade-based...
A blood-impedance measurement system is presented. It is intended for in-vivo analysis of hematocrit and blood viscosity. Using a specially designed central-venous catheter, blood impedance and blood temperature is on line examined. The measurements are performed inside the right atrium, where a strong intracavitary ECG signal is recorded as well. The impedance is measured with sinusoidal signals...
A novel multifunctional distributed optical fiber sensor basing on fiber attenuation is proposed to measure ambient temperature and distributed pressure. The sensor is composed of two fibers, the first fiber is used to sense pressure and temperature value while the second fiber is for position information and pressure indication. Distributed sensing is realized based on the attenuation of the second...
This paper presents a low-cost tide measurement system based on a set of two inclinometers. The inclination sensors deliver a DC output voltage which varies linearly with the angle of its working direction. Thus, with two inclinometers assembled in orthogonal directions, it is possible to provide the tide direction and intensity. The tide measurement system was developed for a stand alone operation...
In this paper a four-electrode measurement cell is proposed for conductivity measurements. The main advantages of these cells include a wide measurement range and an intrinsic capability to minimize errors caused by fouling and polarization effects. The implemented prototype provides a flexible solution for data acquisition and signals processing and includes a capability to generate excitation signals...
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