Title:
HUMIDITY SENSOR DEVICE
Document Type and Number:
Japanese Patent JP2008164380
Kind Code:
A
Abstract:
To provide a humidity sensor device capable of accurately detecting humidity, over a wide temperature range.
The humidity sensor device comprising a humidity sensor, in which impedance changes according to ambient humidity changes; and a transmission circuit, for outputting an AC (alternating current) signal of a predetermined frequency to the humidity sensor, is given temperature characteristics in an oscillation circuit so that AC signals of different frequencies can be outputted, according to the ambient temperature.
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Inventors:
IZAWA ICHIRO
OTAKE SEIICHIRO
OTAKE SEIICHIRO
Application Number:
JP2006353025A
Publication Date:
July 17, 2008
Filing Date:
December 27, 2006
Export Citation:
Assignee:
DENSO CORP
International Classes:
G01N27/02
Domestic Patent References:
JPH041562A | 1992-01-07 | |||
JPH1031000A | 1998-02-03 | |||
JP2001281183A | 2001-10-10 |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Taihei Nonobe
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