Low-cost thermal s-d air flow sensor

© 2002 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to se...

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Main Authors: Domínguez Pumar, Manuel, Masana Nadal, Francisco, Jiménez Serres, Vicente, Bermejo Broto, Sandra, Amírola Sanz, Jorge, Ballester, Javier, Fueyo, Norberto, Castañer Muñoz, Luis María
Format: Text Resource
Language:English
Subjects:
Anemometer
Circuits integrats
Detectors
Enginyeria electrònica
Flow sensor
Instrumentació i mesura
Integrated circuits
Microelectrònica
Sensors i actuadors
Thermal sigma–delta
Àrees temàtiques de la UPC
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Summary:© 2002 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This paper describes the design and optimization of a hot-wire air flowmeter. A low-cost design of the packaging allows good thermal contact with the airflow, as well as good thermal isolation between the hot and cold points. It is a compact solution which allows easy PCB mounting and adaptation to standard-size small air pipes. The design has been optimized for low-cost applications. The sensor is read out by a thermal sigma–delta modulator. The dynamic range of this modulator has been extended by adding a constant power offset to its output. The fractal nature of the modulator response at low-clock frequencies is also experimentally shown. Peer Reviewed
ISSN:1530-437X
DOI:10.1109/JSEN.2002.806308