US 9,810,665 B2
Sonic filter for measuring and capturing particles having a particular particle size in a fluid, mixture or process flow
Mark R. Fernald, Enfield, CT (US); and Timothy J. Bailey, Longmeadow, MA (US)
Assigned to CiDRA CORPORATE SERVICES, INC., Wallingford, CT (US)
Appl. No. 13/983,409
Filed by Mark R. Fernald, Enfield, CT (US); and Timothy J. Bailey, Longmeadow, MA (US)
PCT Filed Feb. 6, 2012, PCT No. PCT/US2012/023973
§ 371(c)(1), (2), (4) Date Nov. 7, 2013,
PCT Pub. No. WO2012/154238, PCT Pub. Date Nov. 15, 2012.
Claims priority of provisional application 61/439,557, filed on Feb. 4, 2011.
Prior Publication US 2014/0047909 A1, Feb. 20, 2014
Int. Cl. G01N 29/036 (2006.01); B01D 21/28 (2006.01); B01D 21/34 (2006.01); H04R 23/00 (2006.01); G01N 15/14 (2006.01)
CPC G01N 29/036 (2013.01) [B01D 21/283 (2013.01); B01D 21/34 (2013.01); H04R 23/00 (2013.01); G01N 2015/142 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A sonic filter (10) that uses a standing wave agglomeration technique to selectively measure particle sizes of particles forming part of a fluid, mixture or process flow (F) in a container (20), comprising:
an acoustic driver (12) that provides an acoustic driver signal having a frequency adjusted to yield a given wavelength for selectively capturing a particular particle size of particles forming part of a fluid, mixture or process flow (F) in a container (20) having a container wall (22), the acoustic driver signal being based upon a relationship between the frequency and the particular particle size using the equation:
Fd=(0.48υ)/2,
where Fd=acoustic drive frequency, ν=kinematic viscosity, and R=particle radius; and
a transducer (14) arranged on the container wall (22), that responds to the acoustic driver signal and provides an acoustic signal having a standing wave (w) at the frequency to yield the given wavelength and selectively capture the particular particle size of the particles in the fluid, mixture or process flow (F) in the container (20), in order to determine the mass of the particles having the particular particle size forming part of the fluid, mixture or process flow (F) and captured in the container (20).