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:
Aug. 05, 1986
Filed:
Dec. 27, 1984
Kaoru Machida, Ootawara, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An ultrasonic flowmeter for ultrasonically measuring physical parameters of a media flowing in a measuring path between two ultrasonic transducer circuits each including transmitting and receiving circuits, each including respective transducers. The measuring path has at least one component in the direction of flow and over which ultrasonic signals are sent alternately upstream and downstream. A detector connected to the receiving circuit operates to detect an envelope curve of the received ultrasonic signal. After detecting the envelope curve of the ultrasonic signal, the zero-crossing point of the envelope curve is determined electrically or arithmetically. The propagation period of ultrasonic waves is developed by defining the zero-crossing point as the beginning of receiving of the ultrasonic signal. Then, the velocity of flow and the volume of flow are calculated based on the propagation periods obtained from the envelope curve of the received ultrasonic signal.