Parameter sensors for vibrating conduit utilizing normal modal decomposition

Abstract From the Canadian patent

A plurality of motion signals is received representing motion at a plurality of locations of a vibrating conduit containing material. The received plurality of motion signals is processed to resolve the motion into a plurality of real normal modal components. A process parameter is estimated from a real normal modal component of the plurality of real normal modal components. The motion signals may be processed by applying a mode pass filter to produce an output that preferentially represents a component of the motion associated with a real normal mode of the vibrating conduit. A process parameter may be estimated from the filtered output using conventional phase difference …