Patent attributes
A hand-washing compliance system can include: a sensor mounted to a chassis, the sensor configured to detect sensor readings; a processor coupled to the chassis and connected to the sensor with a communication conduit, the processor configured to: calculate movement estimations based on differences between the sensor readings at discrete times; count a number of crosses based on how often the movement estimations: are calculated above an upper threshold and are calculated below a lower threshold in consecutive movement calculations, are calculated below the lower threshold and are calculated above the upper threshold in the consecutive movement calculations, or a combination thereof, decrement a countdown timer based on the number of crosses being above a cross-threshold, and pause the countdown timer based on the number of crosses being below the cross-threshold; and a housing mounted to the chassis enclosing the processor and at least partially enclosing the sensor.
