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Non-invasive human breath sensor

Roopa, G and Rajanna, K and Nayak, MM (2011) Non-invasive human breath sensor. In: 2011 IEEE Sensors, 28-31 Oct. 2011, Limerick,Ireland.

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Official URL: http://dx.doi.org/10.1109/ICSENS.2011.6127073


In this paper, the design and development of a novel low-cost, non-invasive type sensor suitable for human breath sensing is reported. It can be used to detect respiratory disorders like bronchial asthma by analyzing the recorded breathing pattern. Though there are devices like spirometer to diagnose asthma, they are very inconvenient for patient's use because patients are made to exhale air through mouth forcefully. Presently developed sensor will overcome this limitation and is helpful in the diagnosis of respiratory related abnormalities. Polyvinylidene fluoride (PVDF) film in cantilever configuration is used as a sensing element to form the breath sensor. Two identical sensors are mounted on a spectacle frame, such that the tidal flow of inhaled and exhale air will impinge on sensor, for sensing the breathing patterns. These patterns are recorded, filtered, analyzed and displayed using CRO. Further the sensor is calibrated using a U-tube water manometer. The added advantage of piezoelectric type sensing element is that it is self powered without the need of any external power source.

Item Type: Conference Proceedings
Publisher: IEEE
Additional Information: Copyright of this article belongs to IEEE.
Keywords: Polyvinylidene Fluoride (PVDF); Respiration Rate; Breathing Pattern; Bronchial Asthma
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 02 May 2013 06:13
Last Modified: 02 May 2013 06:13
URI: http://eprints.iisc.ac.in/id/eprint/46277

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