Numerical Analysis for Remote Identification of Materials With Magnetic Characteristics

Abstract

Abstract-There is a variety of methods used for remote sensing of objects such as acoustic, ground penetration radar detection, electromagnetic induction spectroscopy, infrared imaging, thermal neutron activation, core four-pole resonance, neutron backscattering, X-ray backscattering, and magnetic anomaly. The method that has to be used can be determined by the type of material, geographical location (underground or water), etc. Recent studies have been concentrated on the improvement of the criteria such as sensing distances, accuracy, and power consumption. In this paper, anomalies created by materials with magnetic characteristics at the perpendicular component of the Earth magnetic field have been detected by using a KMZ51 anisotropic magnetoresistive sensor with high sensitivity and low power consumption, and also, the effects of physical properties of materials on magnetic anomaly have been investigated. By analyzing the graphics obtained by 2-D motion of the sensor over the material, the most appropriate mathematical curves and formulas have been determined. Based on the physical properties of the magnetic material, the variations of the variables constituting the formulas of the curves have been analyzed. The contribution of this paper is the use of the results of these analyses for the purpose of identification of an unknown magnetic material. This is a new approach for the detection and determination of materials with magnetic characteristics by sensing the variation at the perpendicular component of the Earth magnetic field. The identification process has been explained in detail in this paper.Index Terms-Anisotropic magnetoresistive sensor (AMR), magnetic anomaly, magnetic materials, power consumption, remote sensing.

Single Sheet Tester With Variable Dimensions

“…To check the correctness of the SST system conception as well as the operation algorithm, the author performed additional measurement of the magnetic field strength in the yoke, using a magnetoresistive sensor, knowing the sources of error resulting from the use of this type of sensor [18], [19]. Because the sensor measures the local value of the magnetic field strength so, the author decided to perform the measurement in 16 regions, and for further analyzes, assumed the average value (see Fig.…”

New Methods of Noncontact Sensing of Blade Vibrations and Deflections in Turbomachinery

“…One of the numerous applications of MR sensors is sensing a motion of materials with magnetic characteristics. By analyzing the graphics obtained by 2-D motion of the MR sensor over the material, the most appropriate mathematical curves and formulas have been determined in [7].…”

Detection and Imaging of Underground Objects for Distinguishing Explosives by Using a Fluxgate Sensor Array

“…In other words, different anomalies occur in the region where the object is buried compared to the region where the object is not buried. This measurement is a passive technique, and BEs and IEDs can be detected by evaluating these anomalies [33][34][35][36][37].…”

“…Fluxgate or anisotropic magneto resistive (AMR) sensor arrays have been integrated to three-axis motion systems in explosive and buried object detection studies with the MA method in the literature, and data have been collected. Although the sensor arrays were moved along the x, y, and z axes during the data acquisition phase, the positions of the sensors were not changed [33][34][35][36][37]. However, even if there is no MA, changing the position of the sensor creates voltage variations at the output of the sensors.…”