Yokogawa Electric Corporation

Akinori Yoshino

Nobuo Miyaji

Toshio Iino

Akimichi Kadoguchi

A Coriolis mass flowmeter includes a vibrator configured to vibrate a measurement conduct line, an upstream sensor and a downstream sensor, which are placed at a certain distance in the measurement conduct line and are configured to detect the vibration of the measurement conduct line, a first effective value reception section configured to receive an effective value of the first signal, a second effective value reception section configured to receive an effective value of the second signal, a ratio computation section configured to receive the effective value of the first signal and the effective value of the second signal and to compute the ratio of both values, and an anomaly diagnosis section configured to make a comparison between the computed ratio and a certain value and to generate an alarm.

Coriolis mass flowmeter

A Coriolis flowmetervibrates a measurement tube through which a fluid subject to measurement flows, detects vibrations including Coriolis force developed in the fluid from the vibrations, and measures a mass flow rate of the fluid from a detection signal. The Coriolis flowmeter is characterized by including fluctuation calculation sectionthat calculates fluctuations from a detection signal SA; status value calculation sectionthat calculates a status value showing a state of air bubbles in the fluid from the fluctuations calculated by the fluctuation calculation section, and determination sectionthat determines a state of air bubbles from the status value calculated by the status value calculation section

Growing community of inventors

Tokyo, Japan

Akinori Yoshino