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Title:
ABSOLUTE HUMIDITY SENSOR
Document Type and Number:
WIPO Patent Application WO/2018/147004
Kind Code:
A1
Abstract:
An absolute humidity sensor that has: a temperature sensor (12c) that is arranged in an environment in which air is flowing and that outputs a temperature signal that is a sensor signal that corresponds to the temperature of the air; a relative humidity sensor (12b) that is arranged in the abovementioned environment and outputs a relative humidity signal that is a sensor signal that corresponds to the relative humidity of the air; and an absolute humidity acquisition unit (22) that acquires the absolute humidity of the air from the temperature signal and the relative humidity signal. The responsivities of the temperature sensor and the relative humidity sensor to changes in the temperature of the air are different. The absolute humidity sensor also has a delay adjustment unit (21a) that: delays the output of a high-responsivity sensor that, of the temperature sensor and the relative humidity sensor, has the faster responsivity; and thereby coordinates the output change behavior of the temperature sensor and the relative humidity sensor relative to changes in the temperature of the air. The absolute humidity acquisition unit acquires the absolute humidity from: the sensor signal from a low-responsivity sensor that, of the temperature sensor and the relative humidity sensor, has the slower responsivity; and the sensor signal from the high-responsivity sensor that has been delayed by the delay adjustment.

Inventors:
KITAHARA Noboru (C/O DENSO CORPORATION, 1-1 Showa-ch, Kariya-city Aichi 61, 〒4488661, JP)
MASHITA Hajime (C/O DENSO CORPORATION, 1-1 Showa-ch, Kariya-city Aichi 61, 〒4488661, JP)
OOGA Takashi (C/O DENSO CORPORATION, 1-1 Showa-ch, Kariya-city Aichi 61, 〒4488661, JP)
KAIFU Teruaki (C/O DENSO CORPORATION, 1-1 Showa-ch, Kariya-city Aichi 61, 〒4488661, JP)
Application Number:
JP2018/000918
Publication Date:
August 16, 2018
Filing Date:
January 16, 2018
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
G01N27/00; F02D21/08; F02D45/00; G01F1/68
Foreign References:
JP2014038056A2014-02-27
JP2015045515A2015-03-12
JP2015194440A2015-11-05
JP2013113778A2013-06-10
JP2012083119A2012-04-26
JP2011099757A2011-05-19
JP2010223179A2010-10-07
US20030034443A12003-02-20
Attorney, Agent or Firm:
JIN Shunji (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-k, Nagoya-city Aichi 03, 〒4600003, JP)
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