Otis Elevator Company

CheongSik Shin

Arthur Hsu

Hansoo Shim

Harold Terry

Randall Keith Roberts

Theresa M Christy

Mauro Jorge Atalla

Seongrak Jeong

Cheng-Shuo Wang

A separation distance is maintained between a leading elevator car () and a trailing elevator car () traveling in the same direction in an elevator hoistway (). A shortest stopping distance (d) of the leading elevator car () and a normal stopping distance (d) of the trailing elevator car () are determined. The separation distance (d) is controlled such that a difference between the normal stopping distance (d) of the trailing elevator car () and the shortest stopping distance (d) of the leading elevator car () is greater than or equal to a threshold distance (d).

Multiple car hoistway including car separation control

Controlling the movement of elevator cars () within a single hoistway () prevents the cars from becoming too close while servicing assigned stops. Example control techniques include controlling door operation of at least one of the elevator cars () to effectively slow down a follower car or speed up a leader car for increasing a distance between the cars in an area within the hoistway () where the cars would otherwise be too close to each other.

Method and system for maintaining distance between elevator cars in an elevator system with multiple cars in a single hoistway

Growing community of inventors

Seoul, South Korea

CheongSik Shin