What is an automatic door operator? -- RWO Message Board

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Date Posted: 20:26:37 03/15/21 Mon
Author:

Usensor (usensor)
Subject: What is an automatic door operator?

Automatic operators are mainly used at accessible openings where assistance in opening the door is needed. Auto operators are ideal for meeting the needs of accessible openings especially at exterior entrance doors. There are two main types of auto operators and they can come with many options to help control the opening.
Automatic door opens when the door controller receives an activation signal by the sensor and activate the gear motor to drive the belt and pulley. When no one is detected inside the activation area, the door starts closing after a designated period of time.
An automatic door operator is a set of driving devices and controllers that opens/closes the door. It includes components such as gear motor and door controller.
The power to the door operator can be turned on/off easily during the maintenance of the door.Activation sensors are used to activate the door’s openings and closings by sending a signal to the door operator.
Safety sensors such as beam sensors detect people or objects on the door track, where it is difficult to be detected by activation sensors.
Automatic doors are equipped with two types of sensors, an activation sensor and a support sensor.
Activation sensor
Sensor to open the door
Different types of sensors such as infrared sensor and activation switches are available. The appropriate activation sensor shall be selected according to the uses and environment.
Safety sensor
Safety sensors are used to prevent the door panels from hitting an object or person near the door or on the door track.
Beam sensor and ultrasonic sensor are two common types of safety sensors.
Automatic doors come in a variety of configurations, but they all share one thing in common—they all have an automatic operator. Automatic doors are not complicated. The basic automatic door has a door, an automatic operator, and sensors with logic circuitry to initiate the automatic operator when someone approaches the door. Most older folks got their first introduction to automatic doors at a grocery supermarket.

Although basic automatic doors are simple, they become more complicated when coupled with electronic access control systems. Why? Because the door must lock until the automatic operator kicks into action. For the automatic operator to open the door, a mechanism must first unlock the door. This must be repeated in reverse order when the door is closed by the automatic operator. For doors with a higher security requirement, the coordination with the automatic operator can become significant. A typical automatic door interface for a high-security door can include:
Receiving a door unlock signal from the access control panel
Initiating a time delay sequence
Sequence Step 1: Electrically retract panic hardware vertical rods
Sequence Step 2: Sense that vertical rods are retracted
Sequence Step 3: Energize the automatic operator
Sequence Step 4: Monitor door opening for presence of a person in the opening
Sequence Step 5: After no presence (all people have passed) initiate automatic door closing by the door operator
Sequence Step 6: Look for door closure (door position switches)
Sequence Step 7: Upon sensing of door closure, release the panic hardware vertical rods (relock the door)
Sequence Step 8: Monitor vertical rod position to ensure that doors are latched

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