Ads
related to: metal detecting devices for beginners instructions pdf
Search results
Results From The WOW.Com Content Network
A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft [dubious – discuss], and a variable-shaped pickup coil. When the coil nears metal, the control box ...
A variety of technologies are used to detect landmines, improvised explosive devices (IED) and unexploded ordnance (UXO), including acoustic sensors, animals and biologically-based detection systems (bees, dogs, pigs, rats), chemical sensors, electromagnetic sensors and hyperspectral sensor analysis, generalized radar techniques, ground ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
Many such devices contain non-functional circuitry or naively constructed approximations of radio transmitters. A few do have functional circuitry, putting out a weak signal with a function generator or a simple timer circuit, but are still largely useless in comparison with a coil-based metal detector; others have been found to contain intentionally obfuscated or completely superfluous ...
Mechanical devices such as flails and excavators are sometimes used to clear mines. A great variety of methods for detecting landmines have been studied. These include electromagnetic methods, one of which (ground penetrating radar) has been employed in tandem with metal detectors. Acoustic methods can sense the cavity created by mine casings.
Alpha particles from a source in the firing tube were admitted through aperture "D" to the detecting vessel, which was a brass tube with a central co-axial wire "B" at a relative potential of 1320 volts DC. The aperture had a mica window so the detecting vessel could run at an absolute pressure of 2-5 mm of mercury.