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Subject: Re: MICROWAVE DETECTOR FOR CONCEALED FIREARMS.
Date: Sat, 11 Jan 2003 09:52:58 GMT
NNTP-Posting-Date: Sat, 11 Jan 2003 20:52:58 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
Why do something so complex? A portable radar tunable from say 100MHz to
90GHz? Not practical when there are simpler technologies available. The
problem is not as much the detection as the will to expend money to
obtain worthwhile detection coverage, whilst not inflaming the citizens
you are ostensibly protecting.
> Re: the quest for a technical fix to the carrying of guns in the UK.
> Basically; the bores of firearms are of a standard size, 7.62mm, 9mm. etc.
> The slot of the ejector mechanism is also of a known and fixed size on each
> type of firearm. The length of the individual firearms is also known. It is
> possible for a handheld device to be developed which emits a microwave beam
> , "chirps" through a number of the frequencies at which these metal
> enclosures are resonant, and detects if they are present in a crowd/on a
> suspect/concealed on the person of a passerby/in a cargo container. A
> combination of returned harmonics could be interpreted by a microprocessor.
> Such a detector would be very useful indeed to the police & customs etc.
> Each weapon has a number of cavities; the trigger-guard, the barrel, the
> ejector-slot, inside the grip under the cheek-pieces. It might be possible
> to determine an unmistakeable fingerprint for a number of common weapons.
> Movement of the weapon (carrying) would have a bonus in that it would expose
> different aspects of the weapon to the detector and the microprocessor would
> inevitably build up an unmistakeable profile of it, sounding the alarm.
> There are certain weapons which are causing a lot of trouble in the UK such
> as the short Uzi and the Ingram automatic weapons. It would be necessary to
> select a "spread" of weapons commonly used by criminals. Different profiles
> could be loaded for different situation.
> It could lead to a "smoke detector" for firearms which would deny whole
> areas of cities to anyone carrying a weapon.
> Since the length of these firearms is known, simple ground radar should be
> capable of playing some role in their detection.
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