US 11,987,472 B2
Air pressure sensor algorithm to detect elevator direction of motion
Derk Oscar Pahlke, Berlin (DE)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed on May 1, 2019, as Appl. No. 16/400,448.
Prior Publication US 2020/0346891 A1, Nov. 5, 2020
Int. Cl. B66B 1/34 (2006.01); B66B 5/00 (2006.01)
CPC B66B 1/3492 (2013.01) [B66B 5/0018 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of monitoring a direction of motion of a conveyance apparatus within a conveyance system, the method comprising:
detecting a first height of the conveyance apparatus at a first time;
detecting a second height of the conveyance apparatus at a first selected time period prior to the first time;
detecting a height change of the conveyance apparatus within the conveyance system in response to the first height and the second height;
determining whether the height change is greater than a first selected height change;
determining that the conveyance apparatus is moving in an upward direction when the height change is greater than the first selected height change;
applying an upward corrective value to shift the first time and the first time period prior to the first time; and
determining that the conveyance apparatus was moving in the upward direction in a time period between the first time minus the upward corrective value and the first selected time period prior to the first time minus the upward corrective value.