B7.2 - Low-Cost Smart Self-Adaptive Humidity Sensors with Parametric Adaptation

Event
SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
Band
Proceedings SENSOR 2009, Volume II
Chapter
B7 - Gas and Humidity
Author(s)
S. Yurish - Technical University of Catalonia, Barcelona, Spain
Pages
117 - 122
DOI
10.5162/sensor09/v2/b7.2
ISBN
978-3-9810993-5-5
Price
free

Abstract

A low cost humidity and temperature smart self-adaptive sensors systems with parametric adaptation is described in the paper. The system is based on dedicated humidity and temperature transducer HTF3130 and Universal Sensors and Transducers Interface (USTI) integrated circuit, especially designed for such applications. The transducer consists of rugged HTS2030SMD humidity sensor and NTC temperature sensor. The USTI directly converts frequency proportional to the humidity
(10 %RH … 95 %RH) and resistance proportional to the temperature (-40 0C…+85 0C) into digits according to three popular sensor interfaces: RS232, SPI or I2C. Simple decision rule of adaptive measuring algorithm lets chose an appropriate accuracy for frequency-to-digital conversion in particular humidity ranges in order to reduce the conversion time. Sensors system is realized with minimum possible hardware. Experimental results have confirmed high metrological performances of designed sensors system.

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