US 12,339,252 B2
Fluid aeration detection systems and methods
Michael J. Cronin, Apple Valley, MN (US); and Xiaobin Wang, Chanhassen, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Appl. No. 17/621,617
Filed by Donaldson Company, Inc., Bloomington, MN (US)
PCT Filed Jul. 2, 2020, PCT No. PCT/US2020/040625
§ 371(c)(1), (2) Date Dec. 21, 2021,
PCT Pub. No. WO2021/003346, PCT Pub. Date Jan. 7, 2021.
Claims priority of provisional application 62/870,386, filed on Jul. 3, 2019.
Prior Publication US 2022/0357302 A1, Nov. 10, 2022
Int. Cl. G01N 29/036 (2006.01); G01N 29/44 (2006.01)
CPC G01N 29/036 (2013.01) [G01N 29/4427 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for fluid aeration monitoring comprising:
a vibration sensor configured to be mounted along a fluid flow path;
a control circuit in signal communication with the vibration sensor;
wherein the control circuit is configured to evaluate a signal received from the vibration sensor to determine
frequencies of vibration; and
magnitudes of vibration at particular frequencies;
wherein the control circuit is further configured to calculate one or more aeration parameters based on the frequencies and magnitudes of vibration, the aeration parameters comprising at least one of an aeration amount, an aeration percentage, a size of air bubbles, a size classification of air bubbles.