I have a hallway, 1.2m wide, with 5 automatic doors.
Walking through the hallway -- with conventional detectors -- opens one door after the other
I thought of using ultrasound, but the dogs don't like it.
I thought about laser beams, but do not know exactly how they work practically; e.g. single beam from ceiling to floor; but how would it sense being interrupted?
I could work something into the door blades, like some proximity sensor (what kind?).
Maybe infrared? I am thinking that a human needs to be in the vicinity of 200mm for the sensor to react.
Or even touch panels, which could react by touch or 20mm distance of a hand, elbow, etc..
It should be unobtrusive... almost unnoticeable...
It should work without touch, and hook into an Arduino; this part I have covered.
My post demonstrates the complxities of operating automated doors on confined spaces.
... such as a hallway, where doors are opposite each other; or at the end, where three doors are located -- one in each direction.
Also, the automated door:
does not only open or close; it may be 'told' to stay open.
needs to be operated from both sides
in case of a door-blade-central touch/near field panel, it disappears in a wall cavity, unable to be reached to further operate the door (at least n the inside of the room)
Is the wall switch the only practical solution; one I was hoping to avoid with automation
The situation can be quite complex, e.g.:
How does a small child operate a specific door?
How does any human operate a distinctive door?
If you would have to solve this problem, how would you do it?
... if the constraints are extended to no wireless or radio frequency
