US 11,885,838 B2
Measuring dissipated electrical power on a power rail
Daniel Adam Warren, San Francisco, CA (US); Michael Mitchell, San Francisco, CA (US); Gwendolyn van der Linden, Mountain View, CA (US); Ford Rylander, Mountain View, CA (US); Brian Silverstein, Mountain View, CA (US); and Arun Raghupathy, Pleasanton, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Aug. 28, 2020, as Appl. No. 17/006,780.
Prior Publication US 2022/0065906 A1, Mar. 3, 2022
Int. Cl. G01R 22/06 (2006.01); G01R 22/10 (2006.01); G05D 23/19 (2006.01)
CPC G01R 22/065 (2013.01) [G01R 22/10 (2013.01); G05D 23/1917 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A smart-home device comprising:
a main power rail that provides power to one or more components of the smart-home device;
an integrator coupled to the main power rail that stores energy on an energy-storage device, wherein the energy stored on the energy-storage device is representative of an amount of power provided to the smart-home device through the main power rail during an integration cycle of the integrator, and wherein:
each integration cycle of the integrator begins when the energy stored on the energy-storage device is reset; and
each integration cycle of the integrator ends when an electrical measurement of the energy-storage device meets or exceeds a threshold; and
a counter that stores a number of integration cycles performed by the integrator during a time interval, wherein a total amount of power provided to the smart-home device through the main power rail during the time interval is represented by:
a product of a number of integration cycles performed by the integrator during the time interval and a known total amount of energy provided to the main power rail during a single integration cycle divided by a length of the time interval; and
the energy stored on the energy-storage device.