Which component helps to prevent the doors from closing when an object is detected?

The component that helps prevent the doors from closing when an object is detected is the infrared sensors or door edge sill switches. These devices are designed to enhance safety by detecting obstructions within the door's closing path.

Infrared sensors use light beams to create a safety zone, and if anything interrupts this beam while the doors are closing, the sensors signal the door mechanism to reverse, preventing the doors from closing on an object or person. Similarly, door edge sill switches are placed on the edges of the doors and activate upon contact, providing an additional layer of protection by opening the doors when they come into contact with an obstruction.

These functionalities are critical for passenger safety in elevator systems, complying with safety regulations and standard practices in elevator door operation.