Title:
PARTICULATE MATTER DETECTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/110660
Kind Code:
A1
Abstract:
The present invention is provided with a sensor unit (1) for outputting a signal corresponding to an amount of particulate matter, and a sensor control unit (4) for detecting a particle count (N) of the particulate matter. The sensor control unit has: a collection control unit (41) for applying a first voltage to a pair of electrodes (21), (22) and causing particulate matter to be electrostatically collected; and a particle count calculation unit (42) for detecting a resistance value (R) between the pair of electrodes after a change to a second voltage different from the first voltage is made in a state in which the sensor output at the first voltage has reached a threshold value, and calculating the particle count using the average particle diameter of the particulate matter estimated from the resistance value and the mass (M) of the particulate matter estimated from the sensor output.
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Inventors:
KOIKE KAZUHIKO (JP)
MIYAGAWA GO (JP)
MIYAGAWA GO (JP)
Application Number:
PCT/JP2017/044959
Publication Date:
June 21, 2018
Filing Date:
December 14, 2017
Export Citation:
Assignee:
SOKEN INC (JP)
DENSO CORP (JP)
DENSO CORP (JP)
International Classes:
G01N27/04; G01N15/06
Domestic Patent References:
WO2011083581A1 | 2011-07-14 | |||
WO2017163650A1 | 2017-09-28 | |||
WO2017034583A1 | 2017-03-02 |
Foreign References:
JP2016075668A | 2016-05-12 | |||
JP2015225022A | 2015-12-14 | |||
US20120186227A1 | 2012-07-26 | |||
JP2016138449A | 2016-08-04 | |||
JP2012047722A | 2012-03-08 | |||
JP2018021889A | 2018-02-08 |
Attorney, Agent or Firm:
AICHI, TAKAHASHI, IWAKURA & ASSOCIATES (JP)
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