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The current method to detect allergies obliges the patient to stay within a room under the observation of the nurse during the allergy tests. Such tests last up to 4 hours. The authors have developed an allergy detection system based on the heart rate variability, which is monitored through electrocardiogram sensors. The detector is based on the correlation between variations of the heart rate and...
The use of Ultra -WideBand (UWB) techniques is considered an attractive solution for indoor Local Positioning Systems (LPS). In this case, the positioning is usually performed by hyperbolic trilateration techniques measuring the time difference of arrival (TDOA) between the received signals coming from the beacons placed in the environment. The detection of the true arrival instant for the used encoded...
The development of Local Positioning Systems (LPSs), that allow user positioning in areas where solutions based on GNSS (Global Navigation Satellite System) fail (as indoor environments), has been an active research field in the last years. In LPSs based on Ultra-Wideband (UWB), near-far effect is a significant issue that severely constrains the system performance. In this work, we present a novel...
In this paper, we tackle the problem of the food allergic detection in children, based on the analysis of the ECG signal. Through the detection of some changes of this signal, it is possible to detect any reaction before the tested subject experiments any physical reaction or any reaction that could be harmful to his/her life. To be able to realize this process in real-time and with portable devices,...
This paper proposes a way to improve the position estimates in an indoor location systems (ILS) based on readings from the power levels (RSSI) of an ad hoc ZigBee network. A mobile object, also equipped with a ZigBee device, can be located, positioned, and tracked by the system. The initial estimate of the mobile node position is extracted from IC devices from Texas Instruments, equipped with a specific...
This work proposes several techniques to validate the detection of objects in railway environments. The system for obstacle detection is based on an infrared emitting barrier and another of receivers placed on opposing side in the railway, establishing different optical links between them. The system is located at the segments of the railroads where it is desired to know the existence of objects,...
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