Honeywell International Inc.
FLOW MEASUREMENT BY COMBINING 3L ECHO WITH DELTA TIME-OF-FLIGHT CROSS CORRELATION

Abstract:

Methods and systems for flow measurement can involve calculating an absolute-time-of-flight with respect to a flow of a fluid in a flow channel by reflected signals, reflected and unreflected signals, or a pulse train, determining a delta-time-of-flight with a cross correlation of two signals with respect to the flow of the fluid in the flow channel, and calculating the flow rate of the flow of the fluid in the flow channel based on the absolute-time-of-flight and the cross correlation of the delta-time-of-flight.