US 12,000,902 B2
Multispectral impedance determination under dynamic load conditions
John Morrison, Butte, MT (US)
Assigned to Dynexus Technology, Inc., Loveland, CO (US)
Appl. No. 17/608,205
Filed by Dynexus Technology, Inc., Loveland, CO (US)
PCT Filed May 1, 2020, PCT No. PCT/US2020/031073
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/223651, PCT Pub. Date Nov. 5, 2020.
Claims priority of provisional application 62/842,141, filed on May 2, 2019.
Prior Publication US 2022/0206076 A1, Jun. 30, 2022
Int. Cl. G01R 31/385 (2019.01); G01R 31/36 (2020.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01)
CPC G01R 31/389 (2019.01) [G01R 31/3648 (2013.01); G01R 31/386 (2019.01); G01R 31/396 (2019.01)] 19 Claims
OG exemplary drawing
 
1. A method of measuring impedance using an impedance measurement device, comprising:
exciting a device under a load condition with a multispectral excitation signal having an excitation time period;
sampling a response of said device over a sample time period including an in-band interval during said excitation time period disposed between out-of-band intervals outside of the in-band interval;
estimating a load response of said device to said load condition during said in-band interval by analyzing said response included in said out-of-band intervals using a sum of sines analysis using a fundamental frequency including a period having a duration greater than said response including said in-band and said out-of-band intervals;
subtracting said load response during said in-band interval from said response during said in-band interval;
analyzing said response having said load response subtracted from said response using a sum of sines analysis; and
generating an impedance measurement of said device.