US Patent 10055657 Depth sensor based passenger detection

A passenger conveyance system includes a depth-sensing sensor within a passenger conveyance enclosure for capturing depth map data of objects within a field of view that includes a passenger conveyance door. A processing module in communication with the depth-sensing sensor to receive the depth map data, the processing module uses the depth map data to determine that the passenger conveyance enclosure is empty. a passenger conveyance controller receives the passenger data from the processing module to control operation of a passenger conveyance door in response to an empty car determination.