Flow meters and related systems and methods

A method of measuring a fluid flow rate, the method comprising:

• directing a fluid over a first structure positioned within a first channel defined by a flow meter, the first structure spanning the flow meter such that the fluid flows over a first and a second side of the first structure;
• producing a first flow-induced vibration that varies according to a rate of fluid flow in a first channel with the first structure;
• measuring the first flow-induced vibration of a remote structure coupled to the first channel;
• determining the rate of fluid flow in the first channel from the measured first flow-induced vibration;
• directing a fluid over a second structure positioned within a second channel defined by the flow meter, the second structure spanning the flow meter such that the fluid flows over a first and second side of the second structure;
• producing a second flow-induced vibration that varies according to a rate of fluid flow in the second channel with the second structure;
• determining the rate of fluid flow in the second channel from the measured first flow-induced vibration;
• converting the measured second flow-induced vibration to an electrical signal;
• and
• separating the electrical signal to a first signal corresponding to the first flow-induced vibration and a separate second signal corresponding to the second flow-induced vibration.

A flow metering system comprising:

• at least one flow meter comprising:
• a body defining a fluid channel therein;
• and
• at least one structure positioned within the fluid channel and fixed relative to the body, the at least one structure shaped and positioned to produce a flow-induced vibration that varies according to a rate of fluid flow through the fluid channel, wherein the at least one structure comprises at least one vortex shedding structure, the at least one vortex shedding structure comprising a plurality of cylindrical pins oriented transverse to a direction of the fluid channel;
• a structure coupled to the at least one flow meter;
• at least one vibration sensor coupled to the structure at a location remote from the at least one flow meter;
• and
• a signal processor configured to receive a signal from the at least one vibration sensor and determine at least one flow rate.