The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
Subject: MICROWAVE DETECTOR FOR CONCEALED FIREARMS.
Date: Sat, 11 Jan 2003 02:16:27 -0000
NNTP-Posting-Host: host213-123-58-129.in-addr.btopenworld.com (220.127.116.11)
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
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.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup