Search International and National Patent Collections

1. (WO2018203429) FLOW VELOCITY MEASUREMENT METHOD, FLOW VELOCITY MEASUREMENT DEVICE, AND PROGRAM

Pub. No.:    WO/2018/203429    International Application No.:    PCT/JP2018/005452
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Sat Feb 17 00:59:59 CET 2018
IPC: G01P 5/22
G01P 13/00
Applicants: SONY CORPORATION
ソニー株式会社
SONY SEMICONDUCTOR SOLUTIONS CORPORATION
ソニーセミコンダクタソリューションズ株式会社
Inventors: NAKAO, Isamu
中尾 勇
KISHII, Noriyuki
岸井 典之
KUWAYAMA, Tetsuro
桑山 哲朗
JO, Kensei
城 堅誠
Title: FLOW VELOCITY MEASUREMENT METHOD, FLOW VELOCITY MEASUREMENT DEVICE, AND PROGRAM
Abstract:
[Problem] To measure flow velocity of a light-scattering fluid in a simple and fast manner. [Solution] The flow velocity measurement method according to the present invention comprises: generating two or more speckle images by successively photographing a light-scattering fluid which is the object to be measured, with an exposure time shorter than the spatial correlation disappearance time which is the time that it takes for spatial correlation of speckle patterns generated by the light-scattering fluid to disappear, at a time interval shorter than the spatial correlation disappearance time; and calculating the velocity and direction of the flow of the light-scattering fluid from temporal fluctuation of the speckle patterns between two or more of the speckle images, wherein photographing the speckle images is performed either by using an imaging device having a line sensor mounted therein or by using an imaging device having an area sensor mounted therein but using a portion of pixel groups of the area sensor.