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The automatic door opening systems are used in commercial buildings, shopping malls, theatres, etc. These systems are used to open the door when a person comes near to the entrance of the door and closes it after he moves away from the door or after entering into the door. There are various kinds of sensors are available in the market to make such types of systems such as Radar sensors, PIR sensors, Infrared sensors, and Laser sensors, etc. This project uses a PIR sensor to open or close the door automatically which senses the infrared energy produced by the human body. When someone approaches the door, the IR energy sensed by the PIR sensor changes and activates the sensor to open and close the door automatically. Further, the signal sent to the microcontroller to control the door.
Automatic Garage Door Opening System
Opening and closing of doors have been always a boring job, especially in places where a person is always required to open the door for visitors such as hotels, shopping malls, and theaters. Here is a solution to open and close the door i.e, movement sensed automatic door opening and closing system. This project is used to sense any body movement near the door. This is achieved with the help of a passive infrared sensor. Generally, a human body emits infrared energy which is detected by the PIR sensor from a particular distance. This signal which is detected by the sensor is fed to a controller to function a door motor through motor driver IC. When a body reaches the operating range of the PIR sensor, it sends a signal to the micro controller to open and close the door.
Most standards are compiled from suggestions and the informed input from manufacturers, installers, architects, engineers, and door designers. The general public has the ability to suggest additions to these standards as well. When the standards are developed, written, and finally accepted, there is often a delay in instituting the new ideas until the next revision is printed and published.
Products that are produced during an interim period between standard revision editions are considered compliant at the time of manufacturing. However, they may not always comply with the revised standards shortly after their production period. In most cases the previous standards are incorporated into the newer editions. The basic parameters and ideas behind the earlier version of the standards have been more refined or finely tuned, not generally changed from the original concept.
With changes in technologies certain aspects of door controls, activation devices, door sensors, and safety equipment have made prior standards obsolete. An example of this is the current usage of overhead door sensing devices to control door functions. Originally, on the early automatic door systems, prior to the development of consistent and dependable sensors, floor mats with electric or hydraulic contacts were the most common form of door activation. Pressure sensitive mats are now in limited installations and considered outdated in most applications.
There are generally provisions in the standards that refer to older equipment that has been in service and still functioning adequately. But, the emphasis on safety is always the primary basis for automatic door standards and the reason that improved designs and newer technology products have taken over.
GENERAL OBSERVATIONS FROM A DOOR SERVICE PROVIDER & DOOR EXPERT WITNESS
As the retained expert witness for both plaintiff and defense in hundreds of personal injury and wrongful death automatic door cases, I have seen severe injuries and deaths occur as a result of every type and design of malfunctioning door systems.
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