US 11,874,295 B2
Electromagnetic slosh and liquid position detection
Eduardo Antonio Rojas, Port Orange, FL (US); Bogdan Udrea, Kihei, HI (US); Daniel Sommer, South Daytona, FL (US); and Nicholas Moline, Daytona Beach, FL (US)
Assigned to Embry-Riddle Aeronautical University, Inc., Daytona Beach, FL (US)
Filed by Embry-Riddle Aeronautical University, Inc., Daytona Beach, FL (US)
Filed on Sep. 17, 2021, as Appl. No. 17/478,212.
Claims priority of provisional application 63/080,490, filed on Sep. 18, 2020.
Prior Publication US 2022/0091156 A1, Mar. 24, 2022
Int. Cl. G01P 15/125 (2006.01); G01F 23/263 (2022.01); G01F 23/00 (2022.01)
CPC G01P 15/125 (2013.01) [G01F 23/263 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for monitoring slosh of a liquid within a propellant tank without requiring use of a moving part, the system comprising:
an electromagnetic transmitter positioned at a first location on or within the tank, the electromagnetic transmitter coupled to a source of electromagnetic energy and arranged to establish a specified electromagnetic field configuration within the tank using a signal from the source;
an electromagnetic receiver positioned at a different second location on or within the tank, the electromagnetic receiver arranged to sense an electromagnetic field established within the tank by the electromagnetic transmitter; and
a control circuit coupled to the electromagnetic receiver, the control circuit configured to determine a characteristic of a spatial configuration of the liquid using the sensed electromagnetic field;
wherein the electromagnetic transmitter is driven using a swept-frequency excitation scheme by the source; and
wherein the control circuit is configured to determine a position or a distribution of the liquid using at least one of a magnitude value, a phase value, a frequency value, or a quality factor value associated with a frequency-domain resonance excited by the swept-frequency excitation scheme.