Multi-functional sensing or measuring system

Details Multi-functional sensing or measuring system Multi-functional sensing or measuring system

G - Physics

01

N

73/71

G01N 27/04 (2006.01) G01N 27/12 (2006.01) G01N 27/22 (2006.01) G01W 1/17 (2006.01)

Patent

CA 1158062

TITLE OF THE INVENTION: Multi-Functional Sensing or Measuring System ABSTRACT OF THE DISCLOSURE: A single multi-functional sensing and measuring system capable of detecting both temperature and humidity is fabricated with a porous metal-oxide ceramics whose dielectric constant is varied with an ambient temperature and whose electric resistance is changed with ambient humidity. The single sensing element can detect simul- taneously and rapidly both the variations in the ambient temperature and humidity, respectively, by means of variation in electric resistance and dielectric constant of the sensing element. A multi-functional sensing or measuring system incorporating such single multi-functional sensing system described above is also provided in which a combination of the single multi-functional sensing element connected in series with a resistor is impressed with a rectangular pulse voltage so that the ambient temperature and humidity can be measured simultaneously in terms of a time constant of a transient state value and a steady state value of a divided voltage across the resistor. The single multi-functional sensing elements described in the present invention can find their wide applications not only in the air conditioning devices but also in other fields which require temperature and humidity controls. - 1 -

369951

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