The Research of Full Digital Beneficiation Metal Detector

2013 ◽  
Vol 385-386 ◽  
pp. 622-625
Author(s):  
Duan Duan Li ◽  
Cheng Hao ◽  
Ce Cui
Keyword(s):  
Electromagnetic Interference ◽  
Cross Correlation ◽  
Temperature Drift ◽  
Metal Detector ◽  
Noise Interference ◽  
Interference Temperature ◽  
The Core ◽  
Metal Impurities ◽  
Interference Signals ◽  
Metal Detectors

Due to the influence of interference signals, such as the electromagnetic interference, noise interference, temperature drift, and so on. The traditionally used metal detectors have the shortcomings of the inaccuracy and poor anti-interference ability. This paper is based on analyzing the principles and characteristics of traditionally used metal detectors, presents a new full digital beneficiation metal detector, which using MSP430 MCU as the core, the FFT algorithm is employed successfully to analyze the induction signals that collected when the metal through the induction coil, gets the amplitude-frequency and phase frequency characteristics, determines whether metal impurities through the coil by the characteristics of cross-correlation function. In the end, achieves good harmonization between sensibility and reliability.

Electromagnetic interference in pacemaker patients

ESC CardioMed ◽  
2018 ◽  
pp. 2005-2011
Author(s):  
Jan Steffel
Keyword(s):  
Electromagnetic Interference ◽  
Healthcare Providers ◽  
Medical Diagnostics ◽  
Working Environment ◽  
Power Lines ◽  
Welding Equipment ◽  
Education Of Patients ◽  
Metal Detectors ◽  
Diagnostics And Therapy ◽  
Wireless Mobile

In spite of the development of specific shielding of electronic devices as well as the current-day preference for bipolar sensing, electromagnetic interference (EMI) may still occur with certain pacemakers in certain settings, which in turn may lead to false inhibition of ventricular stimulation with potentially fatal consequences. The most important sources of clinically relevant EMI include medical diagnostics and therapy (e.g. magnetic resonance imaging, radiofrequency ablation, cardioversion/defibrillation, and electrocautery), the working environment (including high-power lines, combustion/degaussing/welding equipment, and others), as well as sources from daily life (such as wireless mobile phones, metal detectors, household appliances such as induction furnaces, electronic article surveillance devices, and others). To what extent, and whether or not at all, any given source of interference leads to EMI depends on several factors including the duration of interference, the field strength, and the frequency spectrum of the source. In addition, lead properties and device programming are important determinants. Awareness, recognition, and avoidance of EMI sources is of paramount importance, particularly in high-risk pacemaker-dependent individuals. The importance of proper education of patients as well as healthcare providers cannot be overemphasized.

scholarly journals Research on Anti-Radiation Noise Interference of High Definition Multimedia Interface Circuit Layout of a Laptop

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 426 ◽  
Author(s):  
Wei Chien ◽  
Yu-Ting Cheng ◽  
Chiuan-Fu Hsiao ◽  
Kai-Xu Han ◽  
Chien-Ching Chiu
Keyword(s):  
Electromagnetic Interference ◽  
Printed Circuit Board ◽  
Near Field ◽  
Circuit Board ◽  
High Definition ◽  
Interface Circuit ◽  
Noise Interference ◽  
Multimedia Interface ◽  
Pcb Layout ◽  
Detection Instrument

In this paper, several aspects were studied, including the effect of an electromagnetic interference (EMI) noise interference strategy with High Definition Multimedia Interface (HDMI) 1.4, the analysis of a test on a printed circuit board (PCB) layout, and a comparison of the near field intensity radiation distribution between an EMI with a modified HDMI layout and an original layout. In this study, the near field detection instrument of APREL EM-ISight was employed to analyze the distribution of the strength of an electromagnetic noise field. After the practical validation, we found that the PCB layout complies with the standards after the modifications. Meanwhile, the PCB layout satisfies the requirements of most laptop HDMI-related products for EMI.

Study of Blind Source Separation on Transmission Line EMI

2013 ◽  
Vol 846-847 ◽  
pp. 493-499
Author(s):  
Zi Hua Li ◽  
Chun Yan Xiao ◽  
Shuai Gao
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Spectral Characteristics ◽  
Separation Performance ◽  
Fast Independent Component Analysis ◽  
Fastica Algorithm ◽  
Interference Signals ◽  
Emc Design

The transmission line is an important part of electrical system. Electromagnetic interference (EMI) signals can be picked up by transmission lines in a way of conduction or radiation, and interfere the sensitive devices located in the power source end and the load end, so it is important and necessary to separate and identify the EMI source signals coupling to the transmission lines in order to guide the electromagnetic compatibility (EMC) design and the further EMI diagnosis and suppression. Fast independent component analysis (FastICA) algorithm is studied and programmed, and its feasibility and separation performance are validated via simulation of BSS of three mixed signals and the average signals to interference ratio (SIR) is approximately 30 dB. The model of crosstalk of transmission lines is built and simulated, the interference signals are separated by the FastICA algorithm, and the average SIR is over 20 dB. Periodicity and spectral characteristics of the separated interference signals are analyzed, and the identification of interference signals is realized.

scholarly journals Development of the model of input control of timber for the enhancement of operational performance of sawn stream

2019 ◽  
Vol 298 ◽  
pp. 00066
Author(s):  
I.V. Eliseev ◽  
B.M. Shifrin ◽  
V.A. Sokolova
Keyword(s):  
Control System ◽  
Technological Process ◽  
Control Object ◽  
Technological Scheme ◽  
Operational Performance ◽  
Metal Detector ◽  
Feed Line ◽  
Input Control ◽  
Metal Detectors

In this article, a task of enhancement of the operational performance of modern sawing equipment, is set and solved. One of the necessary element thereof is to install scanners of presence of metal inclusions (metal detectors) on the feed line of bolt timber. In this article the control object under observation is the small sawing line based on two round-sawing machines KARA MASTER. It is proposed for the line that a classic technological scheme should be modified in a way the bolt timber, moving through a conveyor, to be passing an aperture of metal detector. In this article, the approach for algorithmization and programming of the control system is proposed to be SWITCH-technology and the corresponding area of programming, an automata-based programming. This technology, made a perfect showing for controlling of various objects, is proposed to be introduced for developing of models of typified technological process of small timber sawing. The first section in your paper.

High Power Actuator Based on Magnetostrictive Composite Core with Temperature Drift Compensation

2014 ◽  
Vol 598 ◽  
pp. 69-74 ◽  
Author(s):  
Jerzy Kaleta ◽  
Krzysztof Kot ◽  
Rafał Mech ◽  
Przemyslaw Wiewiorski
Keyword(s):  
Magnetic Field ◽  
Pid Control ◽  
Feedback Loop ◽  
Initial Conditions ◽  
Signal Generation ◽  
Temperature Drift ◽  
Fiber Bragg Grating Sensors ◽  
The Core ◽  
Drift Compensation ◽  
Initial Settings

The paper presents an actuator based on a coil placed in the casing, with specially prepared connection rods. The construction allows installation of the fiber Bragg grating sensors inside the coil. It allows to measure deformation of the composite that is located in the core of the coil. Thanks to the signal generation with use of DASYLab software, it is possible to precisely control the frequency, value of amplitude excitation and to send the signal to the system with use of the measurement card. The main goal of the experiment is to keep constant value of deformation, by means of a feedback loop with use of PID control, and to change the initial conditions of the test by change of the external force. The system is designed to return to the initial settings by appropriate control of the intensity of magnetic field, and thus the deformation of the sample.

The Research and Development of Automotive Switches Test System Based on LabVIEW

2013 ◽  
Vol 748 ◽  
pp. 681-684
Author(s):  
Yin Han Gao ◽  
Rui Min Zhou ◽  
Kai Yu Yang ◽  
Bing Song
Keyword(s):  
Research And Development ◽  
Virtual Instrument ◽  
Test System ◽  
Test Results ◽  
Noise Interference ◽  
Interference Signals ◽  
Design Software ◽  
Test And Control System ◽  
And Control ◽  
System Designs

This article describes the research and development of automatic switch test and control system. It introduces the hardware structure of the test system, designs and builds the signal conditioning circuit. Applying of virtual instrument design software to achieve the purpose of control the system, and acquisition and processing of test data. And take some effective measures to curb the noise interference signals. The experimental results show that the system can fulfill accurately online monitoring for the parameters in the test process. The test results can be used as a standard to determine whether the switch qualified.

Sleeping with the “Enemy”

2015 ◽  
Vol 3 (3) ◽  
pp. 263-274 ◽  
Author(s):  
Matthew Reeves
Keyword(s):  
Experimental Program ◽  
Archaeological Sites ◽  
Archaeological Research ◽  
Metal Detector ◽  
Survey Techniques ◽  
Hands On ◽  
History Of ◽  
Metallic Artifact ◽  
Metal Detectors ◽  
Proper Context

AbstractIn 2012, the Archaeology Department at James Madison’s Montpelier began an experimental program with Minelab Americas to encourage metal detectorists to become more involved in the scientific process of archaeological research. Specifically, the program is designed to be a week-long experience in which archaeologists and metal detectorists work together to identify and preserve archaeological sites at the 2,700-acre Montpelier property. In the process, the metal detector participants are taught the importance of site preservation through background lectures and hands-on field training in which they use their metal detectors as a remote sensing device. Participants learn how gridded metal detector surveys are conducted and the importance of proper context and curation of recovered objects. The team-based approach of our program has resulted in a co-creation process whereby metal detectorists bring to the table their skills in using their machines to identify subtle metallic artifact signals and archaeologists bring the skill of systematic survey techniques to map and record archaeological sites. In the end, teamwork encourages open and frank discussions regarding the interface between metal detecting and the archaeological communities and has gone a long way toward reconciling differences between these two groups who have a long history of strained relations.

Between Rescue and Research: An Evaluation after 30 Years of Liberal Metal Detecting in Archaeological Research and Heritage Practice in Denmark

2013 ◽  
Vol 16 (4) ◽  
pp. 704-725 ◽  
Author(s):  
Andres S. Dobat
Keyword(s):  
Social Factors ◽  
Current Status ◽  
Archaeological Research ◽  
Complex Interplay ◽  
Metal Detector ◽  
The Past ◽  
The World ◽  
Danish Experience ◽  
Metal Detectors

Since the early 1980s, metal detector surveying conducted by amateur archaeologists has contributed significantly to archaeological research and heritage practice in Denmark. Here, metal detecting has always been legal, and official stakeholders pursue a liberal model, focusing on cooperation and inclusion rather than confrontation and criminalization. Like no other surveying method since the invention of the shovel, the metal detector has contributed to increasing enormously the amount of data and sites from metal-rich periods. Virtually all of the spectacular and ground-breaking discoveries of the past decades are owed to metal detectors in the hands of amateur archaeologists. And it is these finds and sites that today constitute one of the very foci of archaeological research. This article provides an overview of the current status of liberal metal detector archaeology in Denmark 30 years after its inception, and attempts to identify the reasons why this popular hobby never developed into the problem it has become in other parts of the world. It concludes that the success of the liberal model in Denmark is the result of a very complex interplay of legislative, historical, cultural, and social factors. On this basis, it is discussed whether the Danish experience can be used as a source of inspiration in the necessary progression towards a new legal agenda for responsible metal detector archaeology.

The Research of Electromagnetic Interference in Metro Signal System

2010 ◽  
Vol 40-41 ◽  
pp. 478-481
Author(s):  
Lin Na He ◽  
Wei Yin
Keyword(s):  
Electromagnetic Interference ◽  
Signal System ◽  
Interference Signals

This paper analyzes the Metro signal system , the causes of electromagnetic interference, the ways to anti-electromagnetic interference and measures. First, Analyzing commonly used structures and equipment in the Metro signal system, and then Analyzing the various electromagnetic interference signals in the Metro signal system, Finally, the proposed methods and measures for Anti-electromagnetic interference in the Metro signal system.

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