Kabushiki Kaisha Toshiba

Makoto Futoo

Tatsuya Kimura

Hiroshi Nakatani

Yoshito Sameda

Takuya Iijima

Takashi Higuchi

Toshihiko Okamoto

Kiyonori Nishikawa

Hiroaki Nojiri

The invention consists in a capacitative electromagnetic flow meter in which excitation is performed at a frequency above the commercially available frequency and having a characteristic correction filter that corrects the gain frequency characteristic of the exciting current such that the exciting flux waveform has a flat section. In the detection unit, the value of the electrostatic capacitance between the face electrodes A, B and guard electrodes A, B is made smaller than the value of the electrostatic capacitance between the detecting face electrodes A, B and the fluid to be measured. The exciting coils are fixed to a cylindrical yoke, being electrostatically screened by coil fixing plates. Fixing by an earth ring is performed with this cylindrical yoke and the two ends of the measurement tube being symmetrical with respect to the tube axis and electrode axes. In addition, fixing is effected by filling the entire interior of the detection unit with epoxy resin.

Capacitative electromagnetic flow meter

Growing community of inventors

Kanagawa-ken, Japan

Makoto Futoo