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. 30, 2013
Filed:
Nov. 30, 2011
Takehiro Imai, Tokyo, JP;
Tomonobu Matsuda, Tokyo, JP;
Toshiyuki Abe, Tokyo, JP;
Tsutomu Nakajima, Tokyo, JP;
Takehiro Imai, Tokyo, JP;
Tomonobu Matsuda, Tokyo, JP;
Toshiyuki Abe, Tokyo, JP;
Tsutomu Nakajima, Tokyo, JP;
Rion Co., Ltd., Tokyo, JP;
Abstract
A particle counting method that can count the number of the particles precisely. The method discriminates a wave pattern of the scattered light from a normal particle (subject of the counting) and a wave pattern of the light scattered by the agitation such as a floating particle, a radiation or changes in the intensity of the light. In one embodiment, a method for counting particles is disclosed which irradiates a light to a sample gas, detects a scattered light from a particle included in the sample gas by a photoelectric conversion device, counts the number of the particles of every particle size division by the output voltage wave pattern of the photoelectric conversion device, calculate a time difference (Ta−T) from a point (T) being a peak of output voltage wave pattern and a point (Ta) being a falling detection threshold (A), when the time difference (Ta−T) is beyond counting cancellation time (B), the output voltage wave pattern is not counted as a particle.