Magnetic flowmeter with empty pipe detector

Details Magnetic flowmeter with empty pipe detector Magnetic flowmeter with empty pipe detector

G - Physics

01

F

G01F 1/58 (2006.01) G01F 1/00 (2006.01) G01F 1/60 (2006.01) G01N 27/02 (2006.01)

Patent

CA 2169443

An electromagnetic fluid flowmeter includes empty pipe detection circuitry. The empty pipe detection circuitry applies to a common mode asynchronous signal into a pair of electrodes in the flowmeter. Impedance of fluid is determined by measuring the magnitude of the asynchronous signal between an electrode and electrical ground. Impedance is used to determine an empty pipe condition.

Un débitmètre (26) électromagnétique à fluides comprend un circuit de détection de tuyau vide. Ce circuit applique un signal asynchrone en mode commun à une paire d'électrodes (16A, 16B) dans le débitmètre (26). L'impédance du fluide est déterminée par la mesure de la grandeur du signal asynchrone entre une électrode (16A, 16B) et la terre. L'impédance est utilisée pour détecter un état vide du tuyau.

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