Kabushiki Kaisha Toshiba

Japan Atomic Energy Agency

Noriyuki Takeshima

Kuniaki Ara

Masafumi Komai

Kenji Katsuki

Rie Aizawa

Mitsuhiro Enomoto

Daigo Kittaka

Junzo Taguchi

Takeshi Shimizu

Ryoichi Sugawara

Mamoru Konomura

Yoshitaka Chikazawa

Kousuke Aizawa

An electromagnetic flow meter comprises: an excitation member () in which a plurality of magnets () are arranged spaced apart from one another along an outer circumferential surface of a flow channel () through which liquid metal flows, and in which a magnetic field is formed in a direction perpendicular to the outer circumferential surface of the flow channel (); and electrodes () provided between the magnets () of the excitation member (), for measuring the voltage generated when the liquid metal crosses the magnetic field. A pulse excitation electric-current supply device () for supplying a pulsed excitation current to the excitation member () is provided, whereby a flow speed distribution can be suppressed from being generated in the circumferential direction of the channel () even when the flow speed of the liquid metal is low, and the flow rate can be accurately measured.

Electromagnetic flowmeter, electromagnetic flow rate measurement system, and electromagnetic flow rate measurement method

An electromagnetic flowmeter designed to use a smaller excitation device and applicable to measurement on tubular channels of various sectional shapes. The electromagnetic flowmeter includes an excitation device for forming a magnetic field perpendicular to an outer wall of a tubular channel, and a pair of electrodes for measuring an electromotive force generated by the movement of the electroconductive fluid across the magnetic field. The electrodes and two magnetic poles of the excitation device are collectively placed on the outer wall at one side of the tubular channel.

Electromagnetic flowmeter including electrodes and magnetic pole placed in proximity on one side of the outer wall

Growing community of inventors

Yokohama, Japan

Noriyuki Takeshima