metal detector


Pulse induction metal detector
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Because the author considers buried treasures to be the most lasting and potentially most informative repositories of human history, he feels that their detection and excavation should be restricted to approved organisations. This article describes an experimental metal

Application of TDEM techniques to metal detection and discrimination: a case history with the new Geonics EM-63 fully time-domain metal detector
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Background It is by now well established that, although the use of magnetometers permits detection of ferrous metallic objects at the greatest depths, the real problem is generally not detection at great depths, but rather identification of the target itself. In typical UXO surveys

Central-places and metal – detector finds: what are the English productive sites
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In England the growing popularity of metal -detecting over the last two decades has provided archaeologists with a vast range of new material sources. For the Middle Anglo-Saxon period (c. 650-c. 850) in particular this has led to the identification of a completely new type MATERIALS AND METHODS A GC-9A gas Chromatograph (Shimadzu, Japan) equipped with a capillary column (HP-1, 25m x 0.32 mm id x 0.17 um coating) was used throughout the experiment. The GC temperature was programmed from 50 C (hold for 2min) to a final

Evaluation of a commercial visualizing metal detector for UXO/mine detection: the hilti ferroscan system
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We will report on first tests of a commercial imaging metal detector aimed at trying to assess its potentialities and understand in a broader sense if such systems, possibly in a modified form, could be useful to tackle some aspects of the UXO/mine detection problem

A comparison of ITS-90 and detector -based scales between NPL and NIST using metal -carbon eutectics
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International comparisons of temperature scales above the silver point or comparisons of radiometric scales are usually made by transporting high-stability lamps or calibrated radiometers. However, lamps are fragile and difcult to use, while radiometers can be

Metal detector trials
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This document is devoted to eddy-current metal detectors used for finding mines. Its purpose is to collect the information split amongst the various test reports published during the period from 1997 and analyse it from a technical point of view and to evaluate the main factors

Pico-watts range uncooled infrared detector based on a freestanding piezoelectric resonant microplate with nanoscale metal anchors
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This paper reports on the first demonstration of an ultra-high resolution (~ 371 pW/Hz1/2) uncooled infrared (IR) detector based on a high frequency (136 MHz) Aluminum Nitride (AlN) piezoelectric resonant micro-plate completely released from the substrate and

Multiple-role actors in the movement of cultural property: Metal – detector users
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Much of the recent literature has discussed the various stages in the criminal market for looted cultural objects, and the different actors that are present at each of these stages. For many of the best-documented types of looted cultural object, often at the higher end of the

Quantifying Metal – Detector Sensitivity with Metal Spheres
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This report describes the simple tests performed to evaluate the possibilities for using spherical metal balls as test targets to measure the sensitivity of metal detectors. Tests to determine the maximum height at which metal balls are detected have been made for four

Polyharmonic metal detector
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The article deals with usage of polyharmonic signals to metal detection and discrimination. A substantial problem of all conventional eddy current metal detectors (induction devices in general) is in limited possibilities of identification of detected objects. The excitation signal

Contsturction of a Beat Frequency Oscillator Metal Detector
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This paper discusses the design, construction, and testing of a beat frequency oscillator metal detector as a final project submission for ECEN-3400, Electromagnetic Fields and Waves at the University of Colorado, Boulder. The project was completed using

Metal Detector By Using PIC Microcontroller Interfacing With PC
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This system proposes metal detector by using PIC microcontroller interfacing with PC. The system uses PIC microcontroller as the main controller whether the detected metal is ferrous metal or non-ferrous metal . Among various types of metal sensors and various types of metal

Inversion of the Magnetic Polarizability Tensor at a Single Frequency from Walk-through Metal Detector Measurements
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ABSTRACT A tomographic metal detection and characterisation system has been designed and built with the intention of recovering detailed information about magnetic and/or conductive objects within the detector space. This information is gathered as a result of a

A micromachined wireless gamma radiation detector using bulk metal conversion layers
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This paper reports a micromachined wireless gamma radiation sensor. The gas-based detector is comprised of a patterned bulk metal conversion layer assembled on top of a pair of thin-film copper electrodes electroplated on a glass substrate. The metal layer converts

Metal artifact reduction in flat- detector ct acquisitions of stent-assisted coiled intracranial aneurysms
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Purpose In recent years the imaging capabilities of flat detector C-arm X-ray systems have been improved. Flat Detector Computed Tomography (FDCT) has become increasingly popular within minimally invasive endovascular interventions [1, 2]. Very recently it has

Pulse Induction Metal Detector -2
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The bandpass amplifier in Fig. 11 extracts possible signals from background noise caused mainly by transients in the circuits. To permit a gain of up to 8000, a narrow pass-band from 0.2 to 0.6 Hz is used with a high-order filter for sharp roll-off. The circuit also has a limited

Simple, sensitive metal detector
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The metal detecting hobby is enjoying quite a boom at the moment and treasure hunters are not just after gold. Though the price of the precious metal has fallen in recent months, at around $600 an ounce its worth going after. Old coins and relics fetch high prices too, so

Solar Operated Metal Detector Robot based on GSM
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Proposed designed is solar based metal detector Robot. We can control robot from remote location using cell phone. It contains arduino board with metal detector circuit. Robot contains GSM which able to transmit and receive signal from cell phone. It contain ultrasonic

An Intelligent City Guide with a Metal Detector Interface
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In this paper, we propose an intelligent location-aware city guide system which uses a metal detector interface for navigating users. Our system allows users to detect shops that match their preferences, in the same way an actual metal detector would be used to find



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