The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2020
Filed:
Jan. 10, 2019
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Ryozo Takasu, Isehara, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A measurement apparatus includes: a measurement tank including an air inlet and an air outlet; a fan; a light source configured to irradiate micro-particulate matter with light; a photodetector configured to detect scattered light from the micro-particulate matter; a first circuit configured to detect individual particles of the micro-particulate matter based on an output of the photodetector; a second circuit configured to detect a micro-particle group of the micro-particulate matter based on the output of the photodetector; a switch configured to switch into one of a first state in which the output of the photodetector is input to the first circuit and a second state in which the output of the photodetector is input to the second circuit; and a controller configured to control a drive and stop of the fan, a turn-on and a turn-off of the light source, and a switching of a state of the switch.