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In this paper, sensor characterization is done based on gene expression programming evolutionary algorithms. The process presented is suited for situations where there is no knowledge of the sensor equivalent circuit and a set of impedance responses can be obtained for different measurand values. These responses are used by the algorithm to determine the best suited equivalent circuit and choose the...
This paper introduces a new approach to the signal processing algorithms applied for the data provided by passive infrared (PIR) motion sensors used in Ambient Assisted Living Applications (AAL). In AAL, PIR sensors are deployed differently than in the typical security applications and different results are expected by the users from the sensors. In security applications, it is required to inform...
In this work, we propose wide-area measurement based control mechanism for future smart transmission grid applications. The design comprises measurements obtained from local area and geographically isolated remote area to damp out local and inter-area low-frequency oscillation mode to ensure desired dynamic performance of the large scale interconnected power transmission grid system. The synchronized...
With spectral management of the radio spectrum becoming such a large concern in modern society due to an increasing need for faster wireless data transfer, the current utilization of the radio frequency spectrum must first be measured and analyzed before improvements to the current system can be designed and implemented. Choosing the High Frequency (HF) band to serve as a representative of the entire...
This paper examines the advantages and disadvantages of noninvasive and remote temperature estimation employing magnetic nanoparticles (MNPs) in DC and AC applied fields. A Langevin function that describes the magnetization of the MNPs in different applied magnetic fields is investigated to obtain a noninvasive and remote measurement of on-site temperature using MNPs. Several nonlinear functions,...
Reliable operation of high power transformers (HPT) is an essential condition to maintain stable electric energy supply in the increasingly interconnected energy distribution nets. The electrical environment within HPT's ultimately prevents use of wired thermometers, as thermo-couples or diodes which rely on electrical bias. Here, we propose a rather simple sensor design approach that comprises the...
This work is focused on the voltage regulation stage of autonomous sensors powered via inductive links. At the receiving network, a rectifier and a voltage regulator are required to provide a DC voltage supply to the autonomous sensor. Three type of voltage regulators are compared from the point of view of the system power efficiency. Both a theoretical analysis and experimental results are presented...
In this paper, a leukocyte segmentation and recognition method is proposed for leukocyte differential counting. In general, leukocytes are usually manually classified in laboratories by using microscopes. It is a painstaking and subjective task for biologists. An automatic method is essential to reduce the overhead for biologists. The nuclei are used to identify five types of leukocyte in this paper...
Motion artifact (MA) corrupted photoplethysmographic (PPG) signals are the main source of errors in the estimation of arterial blood oxygen saturation (SpO2) in pulse oximeters. For addressing the issue of MA reduction in pulse oximetry applications, the physical origins of PPG signals are to be explored and effective signal processing technique may be employed. In this paper, we propose simple and...
The Debris Resistive Acoustic Grid Orbital Navy Sensor (DRAGONS) is a spacecraft-mounted instrument designed to detect microscopic sized particles in polar and sunsynchronous orbits at 800–900 km which are currently undetectable by ground-based systems. Current orbital debris detection systems are dependent on ground based radars, which only have the capabilities to detect particles with a characteristic...
In this paper, we adopt a Gaussian enveloped linear chirp as the incident signal of the reflectometry for localizing and analyzing concentric neutrals corrosion in the underground power cable. We model the concentric neutrals corrosion as the cutting of the concentric neutrals. In order to find the concentric neutrals corrosion in the underground power cable, we use the adaptive recursive least squares...
Acquisition of a variety of physiological signals is essential for monitoring and investigation of some specific diseases. Many medical instruments have been well developed and deployed in medical institutes, but many of them are bulky and clumsy for daily recording of subjects' activity. A distributed multi-channel physiological data monitoring system was developed for integrating versatile sensor...
This work shows a mathematic calculation of the hydrodynamic model for the Cormoran-AUV, together with a linear controller which is valid in a certain range of speeds. It also presents the navigation instruments needed to work correctly. The mathematic model has been simplified to three degrees of freedom of movement and the whole system has been simulated using the Matlab Simulink Software. The system...
The following paper focuses on the description of an open designed condition analysis system and its methods, which enable the continuous online- or discontinuous offline monitoring of the overall state of a diesel-, heavy fuel oil-, or gas operated large- respectively industrial engine and its subsystems like e. g. the turbocharger.
This paper introduces a high-speed fiber Bragg grating (FBG) sensor system for use in shape estimation of wind turbine tower under dynamic loads. A fiber Bragg grating interrogator was developed with a spectrometer-type demodulator based on a linear photo detector. In the high-speed demodulation mode, up to six arrayed FBGs can conduct 40 kHz sampling per each channel simultaneously, and in the low-speed...
This work presents intramuscular measurements of the electromyogram (EMG) during goal directed arm movements. Thin film electrode arrays were epimysially implanted on the deltoideus of a rhesus macaque and the encapsulation process was monitored by impedance measurements. Increase of impedance plateaued after four weeks indicating a complete incorporation of electrodes. EMG recorded with these electrodes...
The article designs and characterizes various band-pass filters in Fourier Transform Profilometry (FTP) for improvement of 3-D measurement accuracy. A commonly challenging problem still encountered by FTP particularly lies on its unreliable extraction of precise spectral information from the spectral domain. Thus, comprehensive studies on band-pass filtering were performed to investigate the filter...
Tomographic imaging of fluidized bed reactor is of great interest in pharmaceutical, chemical and food industries. A special application is the detection of granule moisture distribution inside the reactor. In this paper we consider electrical capacitance tomography to be used in in-line imaging of conical shaped fluidized bed reactor. Results of determining the granule moisture distribution are shown.
The fact that the photoplethysmographic (PPG) signal caries respiratory information in addition to arterial blood oxygen saturation attracted the researchers to extract the respiratory information from it. In this current work, we present an efficient algorithm, based on the multi scale principal component analysis (MSPCA) technique to extract the respiratory activity from the PPG signals. MSPCA is...
The aim of this paper is to present an acquisition system and experimental measurements of a new micromachined Thermal Conductivity Detector (μTCD), applied downstream of a gas-chromatography (GC) system. We describe a simple and innovative electronics for sensor control and data acquisition, outlining its resistance control, native imbalance compensation and automatic gain control (AGC) algorithm...
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