US 12,084,310 B2
Pressure sensor algorithm to detect elevator status information
Derk Oscar Pahlke, Berlin (DE)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed on Jul. 31, 2019, as Appl. No. 16/527,261.
Prior Publication US 2021/0032076 A1, Feb. 4, 2021
Int. Cl. B66B 1/34 (2006.01); B66B 5/00 (2006.01); B66B 5/04 (2006.01); G01C 5/06 (2006.01)
CPC B66B 1/3492 (2013.01) [B66B 5/0031 (2013.01); B66B 5/04 (2013.01); G01C 5/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of monitoring motion of a conveyance apparatus within a conveyance system, the method comprising:
detecting a first atmospheric air pressure proximate the conveyance apparatus at a first time using a pressure sensor located on the conveyance apparatus;
detecting a second atmospheric air pressure proximate the conveyance apparatus at a second time using the pressure sensor located on the conveyance apparatus;
determining a change in atmospheric air pressure proximate the conveyance apparatus in response to the first atmospheric air pressure and the second atmospheric air pressure;
detecting a height change of a conveyance apparatus in response to at least the change in atmospheric air pressure proximate the conveyance apparatus;
confirming or disconfirming the height change using at least one of a rate of change in atmospheric air pressure prior to the first time, an acceleration of the conveyance apparatus, a rate of change in static atmospheric air pressure, a rate of change in temperature, and a rate of change in relative humidity detection;
detecting a rate of change in atmospheric air pressure prior to the first time;
determining that the conveyance apparatus was not moving prior to the first time in response to the rate of change in atmospheric air pressure prior to the first time;
determining a rate of change in atmospheric air pressure between the first time and the second time; and
adjusting the height change in response to a difference between the rate of change in atmospheric air pressure prior to the first time and the rate of change in atmospheric air pressure between the first time and the second time.