Talk:Induction loop

message: I have cleaned up this article as much as I could.  From 1979 until 1993 I was in the USAF and was a telecommunications technician, so I knew what he was talking about.  The person who wrote this article was obviously an engineer of some kind becuase he was talking about some really deep subjects.  Perhaps the person who wrote this piece could go back through and look at it again.
--TracyRenee 12:32, 30 Mar 2005 (UTC)
replies: text: I've looked at the cleaned-up version as well as the first version and I'm still baffled. Most of the discussion sounds like it should be under electromagnetism and it doesn't get around to defining its subject. I'd VfD or redirect this to electromagnetism, I don't think it's salvageable. --Wtshymanski 21:07, 16 Apr 2005 (UTC)
replies: text:  Having a specific page for this is probably a good idea, though it should be retitled. inductive proximity sensors are used everywhere (just about every stoplight out there). They are definitely a notable subject.Fake0Name (talk) 07:05, 12 November 2010 (UTC)
thread_title: Untitled

message: Just cant think what this stuff is doing here. Can someone write something about induction loops?Light current 02:30, 15 August 2005 (UTC)
replies: text: Trying to integrate this material into electromagnetism or inductance could be verry tricky and time consuming unless you really know the difference between 'conservative' and 'non conservative' etc.. Anyway is there anything here that is not already covered on other pages? I think not. VfD Light current 02:40, 15 August 2005 (UTC)
thread_title:  Temporary Home for material NOT about induction loops 

message: I still have no idea what one of these does aside from that it's used in metal detectors and traffic systems.  Can someone smarter than me write an intro? Lot49a (talk) 19:07, 17 April 2008 (UTC)
thread_title: introduction for laypeople?

message: Wow - some major clean-up is still required. Large parts of this article are barely in English! Grammar, syntax, and so on need some serious work. In addition, there are some major holes in the historical introduction. I know, for example, that a massive amount of research in this area was carried out by the British Army (Royal Artillery) post-world war two, with a particular emphasis on how induction loops might enhance commands in gun installations during the noise of battle. If there is anyone out there with more detailed knowledge, please add it to the article. Timothy Titus Talk To TT 19:33, 28 March 2009 (UTC)
thread_title: Missing material

message: May I propose that the term Induction loop should be the subject of a Disambiguation Page.
At present, there is clearly a severe confusion in the page over the use of the term - probably resulting from it's use as a shorthand description in a number of different fields of application.
The possible applications/links might reasonably be:
Electromangetic Induction (general engineering principles): this is what the suggested article contents in 'talk' above refer to. 
Inductor (electronic component).
Traffic/Vehicle Detection loop.
Hearing Assistance by Audio Induction Loop.
Carrier induction loop systems.
Metal detectors - general.
Military applications - e.g. anti-submarine indicator loop.
The only problem I can see is that some of these might need creating, and that would need to be done by the original contributors to the Induction loop page.
I'd also add that the initial entry about the history of induction loops is possibly referring to carrier communications by induction loop, or the use of the system on military / naval applications? Whatever, it's not a useful layman's introduction to the general concept. So an update is needed. 
If there is support for the disambiguation route, I'd be willing to assist. 
--TechTom (talk) 13:18, 11 June 2009 (UTC)
thread_title:  Disambiguation 

message: The description about how this is used to detect cars makes no sense. Cars are not magnets. Moving a magnet near a piece of conductive material will generate a voltage. Moving a non-magnetic piece of steel (e.g. a car) near a conductive loop will do nothing. Therefore, inductive proximity sensors cannot not be purely passive.
As I understand their function, The proximity detectors in road-surfaces are actually used as inductor in an oscillator, and the proximity of a piece of steel near the loop affects the flow of the magnetic field-lines from the inductor, therefore changing the inductance of the coil. Since the coil is used in an oscillator, the oscillator frequency then changes, which can easily be detected by other electronics.
Critically, this is very much not a passive system. The coils in the road-surface are constantly emitting a small magnetic field, which is what is used to detect the car's presence. Also, motion of the car is not required or relevant to the sensor detecting the car, which is somewhat critical since cars can be stopped at stop-lights.
Furthermore, there seems to be an ongoing conflation of two subjects going on in this article. The discussion of the use of inductive coupling to transfer information (e.g. the Discussion of the "Telecoil", which really should be called a coupled inductor, telecoil is just a brand-name used apparently exclusively in hearing-aids), and the use of inductors to detect the presence of objects are very different things, and use very different systems. Apparently someone has confused the two, since they both *do* use inductors.
I will sit down and do some research about the specifics in a few days (I need to confirm I understand everything precisely. I currently just have a general idea). If anyone has any preferences before I re-write the article a bit, please let me know.
Fake0Name (talk) 07:05, 12 November 2010 (UTC)
thread_title:  Car detector 

message: This article is inspired by a story at How Stuff Works on traffic sensors. Today a link was placed to that story in preparation for an overhaul. I came looking for "inductive loop", essentially the topic of inductive coupling, one of the means of coupling (electronics). The term "loop" is frequently found in physics texts in connection with inductance#Coupled inductors. The two particular applications constituting this article today (traffic detection and audio telecoil) provide too narrow coverage of an essential means of developing Faraday's law of induction. There is significant readership of this article, so improvement would be appreciated.Rgdboer (talk) 22:36, 18 July 2012 (UTC)
thread_title:  Inductive loop 

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thread_title:  External links modified