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Toh with metal detector [not relevant]

asked 2014-01-22 12:47:58 +0300

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updated 2014-01-22 12:47:58 +0300

Hakanakki gravatar image

TOH including Metal detector and extra battery, charging with/without cable

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The question has been closed for the following reason "question is not relevant or outdated" by JSE
close date 2016-02-08 15:19:25.361771

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So basically this and this ? I'm not sure what I make of the "metal detector" part.. Please elaborate.

Milo ( 2014-01-22 13:01:36 +0300 )edit

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answered 2014-01-22 14:37:33 +0300

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updated 2014-01-22 14:37:33 +0300

Hakanakki gravatar image

Answer to Milo: "A metal detector is a portable electronic instrument which detects the presence of metal nearby". If you need to Place a nail into wall, it's good to know where the water pipes are in the wall. If you lost your keyes on the beach you could use your otherhalf to fi´nd it. Neat, isn't it?

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answered 2014-01-22 15:10:40 +0300

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updated 2014-01-22 15:10:40 +0300

There are several approaches to detect metal. Induction being one of them. This could be considered active as a pulse is emitted. This would be something that could be included in TOH. A passive way to detect (ferrous) metal is using a compass. The phone has a magnetometer(right?) So in principle this could be used. However it needs to be pretty close to the target to work. Beside I don't know it the magnetometer is a total field magnetometer or a tri-axial one. At any rate the orientiation (gyro?) sensor or accelerometer should also be employed to determine the orientation of the phone.

So a basic proof of principle should be possible with the phone just like it is using the various sensors on board. How effective it is going to be depends on sensitivity. I would not expect too much from it though.

Alternatively,... the fact that a magentometer is on board opens up all kinds of other possibilities. Like referencing the phone's position with respect to known magnetic or ferrous objects. Consider this an exercise for getting the creative juices flowing ;) Thinks about games but also serious applications.

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Asked: 2014-01-22 12:47:58 +0300

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Last updated: Jan 22 '14