Metal Detector Signal Imprints of Detected Objects

Digital Binary Phase-shift Keyed Signal Detector

We have developed the effective algorithm for detecting digital binary phase-shift keyed signals. This algorithm requires a small number of arithmetic operations over the signal period. It can be relatively easy implemented based on the modern programmable logic devices. It also provides high interference immunity by identifying signal presence when signal-to-noise ratio is much less that its w...

Metal detector and swallowed metal foreign bodies in children.

OBJECTIVE To evaluate a metal detector to diagnose swallowed radio-opaque metal foreign bodies (MFBs) in children, and whether they can detect non-radio-opaque MFBs. METHODS In a prospective study, 231 children, who presented to the accident and emergency department with a history of swallowing MFBs, were evaluated by the metal detector as well as radiography to confirm and locate the presenc...

A Non-Metal Emission Detector for HPLC

A liquid chromatography system with an inductively coupled plasma detector is used to prepare a single calibration curve that is useful for multiple analytes. The detector monitors the atomic emission from carbon at 193.09 nm. Hence the analytes need not exhibit appreciable molar absorptivity or native fluorescence. Since the carbon signal is independent of molecular structure, the sensitivitie...

Robust Classification of Objects using a Sparse Detector Sensor

This paper emphasizes techniques for broad-scale classification of objects sensed by a prototype unattended ground sparse detector sensor. A wide range of machine learning techniques were applied to create models of three broad classes of objects, such as humans, humans wearing large backpacks, and non-humans using data obtained from the sparse detector sensor in a laboratory environment. Fusio...

Category of Polygroup Objects