WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1981001877) KARMAN VORTEX CURRENT METER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001877    International Application No.:    PCT/JP1980/000094
Publication Date: 09.07.1981 International Filing Date: 02.05.1980
IPC:
G01F 1/32 (2006.01)
Applicants:
Inventors:
Priority Data:
79/172736 29.12.1979 JP
Title (EN) KARMAN VORTEX CURRENT METER
(FR) COMPTEUR DE COURANT A VORTEX DE KARMAN
Abstract: front page image
(EN)Current meter which comprises a vortex-generating pole arranged nearly perpendicular to the direction in which a fluid flows inside a duct, an ultrasonic wave transmitter so mounted as to propagate ultrasonic waves across a stream of Karman vortex-street which is generated downstream of the vortex-street generating pole, and an ultrasonic wave receiver for receiving ultrasonic waves modulated by the Karman vortexes, the ultrasonic wave transmitter being oppositely mounted on the upper side of the ultrasonic wave receiver. Since there is an improvement in the detecting ability in the generation frequency of Karman vortexes at a lower fluid stream velocity, the meter is suitable for measuring the intake air volume in an automobile.
(FR)Un compteur de courant comprend un pole generateur de vortex dispose presque perpendiculairement a la direction dans laquelle un fluide s"ecoule a l"interieur d"une conduite, un emetteur d"ondes ultrasoniques monte de telle sorte qu"il propage des ondes ultrasoniques au travers d"un courant de vortex de Karman qui est genere en aval d"un pole generateur de vortex, et un recepteur d"ondes ultrasoniques recevant des ondes ultrasoniques modulees par les vortex de karman, l"emetteur d"ondes ultrasoniques etant monte a l"oppose sur le cote superieur du recepteur d"ondes ultrasoniques. Etant donne qu"il y a une amelioration dans la capacite de detection de frequence de generation de vortex de karman aux petites vitesses du courant de fluide, le compteur est approprie pour mesurer le volume d"air d"admission dans une voiture.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)