Does the speed at which you pass through a metal detector effect its sensitivity?

[SanahGrat]

Say I have a 20g iron nail in my pocket, and this is right around the threshold of a metal detector in a security line. Would it matter if I ran through the detector at top speed or walked through the detector slowly?

In my mind there are two considerations. One, running through may give the detector a short enough signal that the software filters it out as an anomaly (here I'm talking about speeds attainable by humans, I'm not trying to say that the piece of metal is going so fast that it exceeds the sampling rate of the detector, just that there are software controls to exclude false positives but in this case they would be filtering out a true positive.)

Second, going through faster actually will generate a larger signal (like a magnet passing through a coil more quickly generates a larger current), so it's the person who walks through very slowly that is not detected.

I am asking these questions with little understanding of the engineering or physics behind metal detectors, and was hoping you all could provide some insight.

 

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[jeff of pa]

if it's manufactured like an 1980,s bounty hunter Red Barron the faster ya go the better the signal


I like that question won't matter if ya got metal on ya or not. if you run through at top speed,
someone will chase ya

thanks for the morning chuckle

 

[Toecutter]

if it's manufactured like an 1980,s bounty hunter Red Barron the faster ya go the better the signal


I like that question won't matter if ya got metal on ya or not. if you run through at top speed,
someone will chase ya

thanks for the morning chuckle

And thank you Jeff...

 

[pepperj]

Either way you'll get nailed for sure

 

[jeff of pa]

They must have read S_G's post

is that a Double Dare line ?

 

[pepperj]

They must have read S_G's post

is that a Double Dare line ?

It's like at the airport scanner-BEEP!

"You have a choice of the body scan-or a full body pat down search sir"

Oh please the full body pat down search-I've been feeling lonely lately-Oh BTW can you do it slowly please?"

 

[jeff of pa]

I wonder if you can ask for a Lineup of Female Security in Bikinis, To pic from.
or is that sexist to expect bikinis ?

"I don't know what you're looking for, but it's a little to the right."

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[CreakyDigger]

If you're going to get nailed, you might as well go hammered.

 

[islamoradamark]

Welcome to Treasure net

 

[No gold in NY]

If joke time is over, perhaps one of you experts can give this new person a straight answer. I think he wants to know about the speed of his swing.

 

[Carl-NC]

Security walk-thru detectors are motion sensitive. If you go through very (VERY) slowly it won't detect a cannon. If you go through too fast (usually VERY fast) then modest targets will get missed, but probably not that cannon. Security detectors are designed to NIJ 06.02 standards which specify a target speed range of 0.2m/s up to 2m/s, with several specified standard target types.

 

[ConceptualizedNetherlandr]

Security walk-thru detectors are motion sensitive. If you go through very (VERY) slowly it won't detect a cannon. If you go through too fast (usually VERY fast) then modest targets will get missed, but probably not that cannon. Security detectors are designed to NIJ 06.02 standards which specify a target speed range of 0.2m/s up to 2m/s, with several specified standard target types.

So bring a wooden walker and hobble thru very slowly?

 

[ConceptualizedNetherlandr]

But alas ... this very topic was covered exhaustively on a different forum. Entirely different. And the answer is hold your retractable pen high in your raised hand and yell 'allah akbar' as you click away ... and it won't be long ....

 

[boogeyman]

when doing revenue protection, we'd get bored at the grocery stores. So we'd grab sheets of the tags hold a tag over our head & walk right through no alarm. This evolved into seeing how many we could get through with. Each alarm had to be logged by the front end manager. When one particularly nasty manager was working, we'd stick em under the carts. Best night? 57 alarms and two real ones.