So just something that’s been on my mind. At my workplace there’s an automatic road barrier that lifts up and down when vehicles arrive. However, it’s not used for a carpark system when people wave their tickets or something. It just goes up and down when a vehicle shows up.
However, it sometimes goes up for when say a pushcart is being rolled over whereas it wouldn’t for a guy pushing a bin.
So tldr, how does an automatic road barrier decide that yes, a vehicle is coming, and therefore opens up?
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.”
So a large wooden horse could slip by without detection
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?
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.
Depends on how high on their horse they are: They might be too far away to trigger the sensor.
How about a wooden badger?
How about a Canadian beaver? They basically are wood
An aftican badger or a european?
Huh? I don’t know that… ahh!
Badger my ass it’s probably milhouse
This, it’s like a metal detector but, bigger. Temporary boom gates might use infrared motion sensors like automatic lights. edit: “lights” like the lights some people have on their porch.
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Huh, so that’s a completely new concept I’ve learned today. Time to do more reading. Thanks!
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.
looks like it really depends, https://us.beasensors.com/en/segment/vehicle-sensing-solutions/barriers/ has some information about the specific sensora they use.
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Good bot
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There could be a motion sensor behind maybe? It could be one of those places that have a bunch of coils on the ground, wherein a large enough mass of metal gets detected by changing magnetic or electric fields, or something else entirely
Could be a lot of ways- an IR beam some where before the barrier. A motion sensor (usually IR or IR+ultrasound). Possibly some sort of movement detection on the security cameras.
Or a magnetic loop sensor, which is my guess. (You’d see the other sensors.)
