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The following topics are dealt with : sensor device; sensor-based localization and tracking; sensor signal conditioning; sensor interfacing circuit; and medical sensors.
The control of air quality is of great importance, in particular for the protection of the workers who can be exposed to toxic gas. The present work reports the development of new chemical sensors for the detection of halogenated gases. These sensors are based on the use of nanoporous matrices doped with cationic surfactants and acting as sponges to trap the targeted pollutants. These chemical sensors...
This article is addressed to developing flexible all-organic bi layer (BL) film-based sensors being capable of measuring strain as a well-defined electrical signal in a wide range of elongations and temperature. The purpose was achieved by covering polycarbonate films with the polycrystalline layer of a high piezoresistive organic molecular conductor. This type of sensors is able to take the place...
Nowadays, a vast range of construction and agricultural machines, such as tractors, graders, scrapers, and back hoes are equipped with computerized control devices for earth moving processes. The main job of these devices consists of the topography surveying, cutting and filling of elevated and spotted low area, and these actions depend on machine ability in elevation and thickness measurement and...
A new and simple method to measure distance and cable length together with its design and implementation is described on this paper. The idea here presented is based on the endless repetition of an electric pulse. At either end or terminal of the distance or cable to be measured a repetition system is installed to resend the pulse to the other terminal. This endless pulse repetition creates a frequency,...
In this work, a white light interferometry technique has been developed for measuring the thickness of a multi-layer structure. Essentially, the method utilizes a white light source, which illuminates a test object mounted on a translation stage, using a modified Michelson interferometer configuration. Images of the object are recorded at certain prescribed vertical movements of the translation stage...
The possibility of recycling ambient energies with miniature electrical generators instead of using batteries with limited lifespan has stimulated important research efforts over the past years. Integration of such miniature generators is mainly envisioned into low power autonomous systems, for various industrial or domestic applications. Advances in the field of new smart materials have suggested...
The paper presents theoretical and experimental research concerning the manufacture of an intelligent piezoceramic sensor for non-destructive tests (NDT) applications in non-metallic materials. The non-destructive impact-echo method is a suitable technique for the flaw detection in the material structure, based on stress wave propagation. A transient stress pulse is introduced into the sample by an...
Human activity quantification consists of computing a numerical or qualitative metric that indicates the amount of movement a person engaged in a given time interval. Such a metric has important applications in elderly care, wellness and healthcare given the strong empirical relation between a person's health and his or her activity level. This paper proposes and evaluates methods to quantify the...
Radar is an attractive technology for long term monitoring of human movement as it operates remotely, can be placed behind walls and is able to monitor a large area depending on its operating parameters. A radar signal reflected off a moving person carries rich information on his or her activity pattern in the form of a set of Doppler frequency components produced by the specific combination of limbs...
This article presents an indoor localization system based on Impulse-Radio Ultra-Wideband. A novel peak detection technique is proposed to be used for Round-Trip-Time ranging. Additionally, the accuracy and complexity of different positioning algorithms are studied. The effect of different configurations of the fixed and mobile transceivers on the accuracy is also analyzed. Simulations have been performed...
The precision of ultrasonic flowmeter is mainly depending on ultrasonic path adaptability for velocity profile of pipe, especially for the special cases, such as ultrasonic flowmeter located near the elbow of pipe. In this paper, the flow fields of some typical pipes were numerically calculated with commercial CFD software, and the velocity profiles in different section of pipe were investigated....
A wireless pressure monitoring system was developed by Florida Institute of Technology to measure wind induced pressure on low-rise structures during hurricanes. This study presents tests made to evaluate the performance of the sensors and their ability to measure accurate pressure variations. To test the reliability of the pressure sensors, a series of tests were designed. The resulting measurements...
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