This, it’s like a metal detector but, bigger. Temporary boom gates might use infrared motion sensors like automatic lights.
Comment on How does an automatic road barrier decide when a vehicle is coming?
atlasraven31@lemm.ee 1 year ago
Same as traffic lights. “Inductive-loop traffic detectors use an electrically conducting loop embedded in the pavement to send a signal to the traffic control system to indicate the presence of a vehicle.”
Narc082@aussie.zone 1 year ago
TWeaK@lemm.ee 1 year ago
It’s bigger in overall structure size, but isn’t really that big itself. It’s just a wire loop, they can be installed into existing roads with minimal effort - they just dig a narrow trench and then seal it up, it doesn’t require more tarmac.
tired_lemming@sh.itjust.works 1 year ago
Huh, so that’s a completely new concept I’ve learned today. Time to do more reading. Thanks!
Tomahtoes@lemmy.world 1 year ago
Check the road in front of the gate. Those loops are usually installed after the asphalt so there should be a loop patched up with tar a bit smaller than a footprint of an average car.
otter@lemmy.ca 1 year ago
So a large wooden horse could slip by without detection
astraeus@programming.dev 1 year ago
If the large wooden horse is full of men in metal armor, purely hypothetically speaking, would the loop still not pick up the large wooden horse?
wkk@lemmy.world 1 year ago
Technically speaking it would pick up the men in metal armors, not the wooden horse per se.
But the barrier would lift for the wooden horse full of men in armor indeed.
_haha_oh_wow_@sh.itjust.works 1 year ago
Depends on how high on their horse they are: They might be too far away to trigger the sensor.
AmidFuror@kbin.social 1 year ago
How about a wooden badger?
UncleBadTouch@lemmy.ca 1 year ago
How about a Canadian beaver? They basically are wood
atlasraven31@lemm.ee 1 year ago
An aftican badger or a european?
AmidFuror@kbin.social 1 year ago
Huh? I don't know that... ahh!
HeyThisIsntTheYMCA@lemmy.world 1 year ago
Badger my ass it’s probably milhouse