Metal Detectors - Revision history

Anchovy at 07:35, 4 December 2015

2015-12-04T07:35:00Z

← Older revision		Revision as of 03:35, 4 December 2015
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	==References==		==References==

	[http://www.explainthatstuff.com/metaldetectors.html/]		[http://www.explainthatstuff.com/metaldetectors.html/ http://www.explainthatstuff.com/metaldetectors.html]

	[http://inside.mines.edu/~jamcneil/TPT_MetalDetector.pdf/]		[http://inside.mines.edu/~jamcneil/TPT_MetalDetector.pdf/ http://inside.mines.edu/~jamcneil/TPT_MetalDetector.pdf]

	[http://www.metaldetector.com/learn/metal-detector-history/history-of-the-metal-detector/]		[http://www.metaldetector.com/learn/metal-detector-history/history-of-the-metal-detector/ http://www.metaldetector.com/learn/metal-detector-history/history-of-the-metal-detector]

Anchovy at 07:34, 4 December 2015

2015-12-04T07:34:21Z

← Older revision		Revision as of 03:34, 4 December 2015
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	== See also ==		== See also ==

	[http://www.physicsbook.gatech.edu/Biot-Savart_Law]		[http://www.physicsbook.gatech.edu/Biot-Savart_Law Biot-Savart Law]

	[http://www.physicsbook.gatech.edu/Magnetic_Force]		[http://www.physicsbook.gatech.edu/Magnetic_Force Magnetic Force]

	[http://www.physicsbook.gatech.edu/Faraday%27s_Law Faraday's Law]		[http://www.physicsbook.gatech.edu/Faraday%27s_Law Faraday's Law]

Anchovy at 06:41, 4 December 2015

2015-12-04T06:41:33Z

← Older revision		Revision as of 02:41, 4 December 2015
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	== See also ==		== See also ==

	[http://www.physicsbook.gatech.edu/~~Magnetic_Field_of_a_Solenoid Magnetic Field of a Solenoid~~]		[http://www.physicsbook.gatech.edu/Biot-Savart_Law]

	[http://www.physicsbook.gatech.edu/~~Curly_Electric_Fields Curly Electric Fields~~]		[http://www.physicsbook.gatech.edu/Magnetic_Force]

	[http://www.physicsbook.gatech.edu/Faraday%27s_Law Faraday's Law]		[http://www.physicsbook.gatech.edu/Faraday%27s_Law Faraday's Law]

	[http://www.physicsbook.gatech.edu/Inductance Inductance]		[http://www.physicsbook.gatech.edu/Inductance Inductance]

	~~[http://www.physicsbook.gatech.edu/Transformers_from_a_physics_standpoint Transformers]~~

	==References==		==References==

Anchovy at 06:33, 4 December 2015

2015-12-04T06:33:41Z

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	The metal detector was invented out of necessity. On July 2, 1881, President James Garfield was shot in Washington, D.C. by a man named Charles J. Guiteau. The President was shot in the back but it was not life-threatening, but the bullet could not be found and it was causing the President to suffer. When Alexander Graham Bell visited the President during this time, he built a metal detector to be able to find this bullet. Unfortunately, the device was unsuccessful due to metal springs in the President's bed that were confusing the device unbeknownst to Bell. President Garfield died of the wound infection on September 19, 1881.		The metal detector was invented out of necessity. On July 2, 1881, President James Garfield was shot in Washington, D.C. by a man named Charles J. Guiteau. The President was shot in the back but it was not life-threatening, but the bullet could not be found and it was causing the President to suffer. When Alexander Graham Bell visited the President during this time, he built a metal detector to be able to find this bullet. Unfortunately, the device was unsuccessful due to metal springs in the President's bed that were confusing the device unbeknownst to Bell. President Garfield died of the wound infection on September 19, 1881.

			Bell's invention was a prototype to later inventions used to find and clear landmines and unexploded bombs across Europe after both world wars. Then Gerhard Fisher created the first portable metal detector in 1925, but Charles Garrett, an electrical engineer, started metal detecting as a hobby, also reinventing metal detector design at the time.

	== See also ==		== See also ==

Anchovy at 06:06, 4 December 2015

2015-12-04T06:06:47Z

← Older revision		Revision as of 02:06, 4 December 2015
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	==History==		==History==

	~~Put this idea~~ in ~~historical context~~. ~~Give~~ the ~~reader~~ the ~~Who~~, ~~What~~, ~~When~~, ~~Where, and Why~~.		The metal detector was invented out of necessity. On July 2, 1881, President James Garfield was shot in Washington, D.C. by a man named Charles J. Guiteau. The President was shot in the back but it was not life-threatening, but the bullet could not be found and it was causing the President to suffer. When Alexander Graham Bell visited the President during this time, he built a metal detector to be able to find this bullet. Unfortunately, the device was unsuccessful due to metal springs in the President's bed that were confusing the device unbeknownst to Bell. President Garfield died of the wound infection on September 19, 1881.

	== See also ==		== See also ==
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	[http://www.physicsbook.gatech.edu/Transformers_from_a_physics_standpoint Transformers]		[http://www.physicsbook.gatech.edu/Transformers_from_a_physics_standpoint Transformers]

	==~~=Further reading=~~==		==References==

	~~Books, Articles or other print media on this topic~~		[http://www.explainthatstuff.com/metaldetectors.html/]

	~~===External links===~~
	[http://www.~~scientificamerican~~.com/~~article/bring-science-home-reaction-time~~/]


	~~==References==~~

	~~This section contains the the references you used while writing this page~~		[http://inside.mines.edu/~jamcneil/TPT_MetalDetector.pdf/]

	[~~[Category~~:~~Which Category did you place this in?]~~]		[http://www.metaldetector.com/learn/metal-detector-history/history-of-the-metal-detector/]

Anchovy at 05:43, 4 December 2015

2015-12-04T05:43:41Z

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	==Connectedness==		==Connectedness==
	~~#How~~ is ~~this~~ topic ~~connected to something~~ that ~~you are~~ interested in?
	~~#How~~ is it ~~connected~~ to ~~your major?~~		This is a topic that I am interested in because I have always wanted to own a metal detector. It is eye-opening to see how the physics I have been learning this semester relates to this device when I never thought twice about how it works. Metal detectors have many applications other than just as metal detectors to look for valuable items, but they can also be used for things such as security purposes to screen for dangerous weapons and the like.
	~~#Is there an interesting industrial application?~~

	==History==		==History==

Anchovy at 04:36, 4 December 2015

2015-12-04T04:36:15Z

← Older revision		Revision as of 00:36, 4 December 2015
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	[[File:Simpledetector.png]] [[File:newdetector.jpg]]		[[File:Simpledetector.png]] [[File:newdetector.jpg]]

	~~===Simple===~~
	~~===Middling===~~
	~~===Difficult===~~

	==Connectedness==		==Connectedness==

Anchovy at 04:35, 4 December 2015

2015-12-04T04:35:29Z

← Older revision		Revision as of 00:35, 4 December 2015
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	Emf induced in receiver coil:		Emf induced in receiver coil:

	<math>\mathcal{E} = {{\mu_0}}N_pN_f{\pi}R_P^2/(2R_f) {~~{d\Phi}~~ \over dt} \ </math>		<math>\mathcal{E} = {{\mu_0}}N_pN_f{\pi}R_P^2/(2R_f) {dI(t) \over dt} \ </math>

	===A Visual Model===		===A Visual Model===

Anchovy at 04:34, 4 December 2015

2015-12-04T04:34:43Z

← Older revision		Revision as of 00:34, 4 December 2015
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	<math>R_f</math> is the radius of the transmitter coil		<math>R_f</math> is the radius of the transmitter coil

	Approximate magnetic flux of the ~~pick up~~ coil:		Approximate magnetic flux of the receiver coil:

	<math>\mathcal{\Phi} = ({\pi}R_p^2)N_f{{\mu_0}}I(t)/(2R_f)</math>		<math>\mathcal{\Phi} = ({\pi}R_p^2)N_f{{\mu_0}}I(t)/(2R_f)</math>

			Emf induced in receiver coil:

			<math>\mathcal{E} = {{\mu_0}}N_pN_f{\pi}R_P^2/(2R_f) {{d\Phi} \over dt} \ </math>

	===A Visual Model===		===A Visual Model===

Anchovy at 04:29, 4 December 2015

2015-12-04T04:29:52Z

← Older revision		Revision as of 00:29, 4 December 2015
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	Approximate magnetic flux of the pick up coil:		Approximate magnetic flux of the pick up coil:

	<math>\mathcal{\Phi} = ({\pi}R_p^2)</math>		<math>\mathcal{\Phi} = ({\pi}R_p^2)N_f{{\mu_0}}I(t)/(2R_f)</math>

	===A Visual Model===		===A Visual Model===