GORDON MARK FINCANNON
Pilots at Piccadilly, West Bloomfield, MI
License number
Michigan A5205485
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
5403 S Piccadilly S PICCADILLY, West Bloomfield, MI 48322
Professional information
In Situ Fluid Condition Monitoring
US Patent:
2005018, Aug 25, 2005
Filed:
Feb 24, 2004
Appl. No.:
10/786818
Inventors:
David Sosnowski - Lake Orion MI, US
Gordon Fincannon - West Bloomfield MI, US
Gordon Fincannon - West Bloomfield MI, US
Assignee:
EATON CORPORATION - Cleveland OH
International Classification:
G01N027/02
US Classification:
324444000
Abstract:
A database is compiled of values of the frequency fcorresponding to the minimum reactance Z″(Nyquist minimum) versus temperature Tover a selected range of temperatures for a probe immersed in a sample of the fluid to be monitored and excited by an a.c. voltage and the frequency swept over a range to cover both bulk fluid and electrode interface impedance characteristics. The probe is then excited in situ and the temperature measured. The Nyquist minimum is then determined from the database and the current measured on the low frequency (interfacial) side of the Nyquist minimum. The angle Θ of the rate of change of resistance Z″ with respect to resistance Z′ and magnitude of the impedance Zis then determined from the current measurement; and, the fluid condition Ψ determined from a previously compiled database of values of Ψ, Zand Θ.