Detection of Magnetic Fluid Volume Density with a GMR Sensor

Yamada, S.; Chomsuwan, Komkrit; Mukhopadhyay, Subhas Chandra; Iwahara, M.; Kakikawa, Makiko; Nagano, I.

doi:10.3379/jmsjmag.31.44

Cited by 29 publications

(32 citation statements)

References 5 publications

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“…Currently magnetic fluids are used in a numerous clinical applications such as magnetic drug targeting (MDT), magnetic resonance imaging (MRI), hyperthermia therapy and others [16,17]. Especially in hyperthermia treatment based on induction heating,proper estimation of magnetic fluid concentration is crucial for successful therapy [17].…”

Section: Estimation Of the Concentration Of Magnetic Fluid In Hyperthmentioning

confidence: 99%

Micron size GMR magnetic sensor with needle structure

Yamada¹,

Haraszczuk²,

Kakikawa³

et al. 2012

AIP Conference Proceedings

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ABSTRACT. The work presents inimitable shaped needle type probe with spin valve giant magnetoresistance (SV-GMR) elements. Sensitive elements with 75 µm width are connected in the Wheatstone bridge structure. The length of the needle is 20-30 mm and its cross section is square. The magnetic sensor probe has the advantage of micron order spatial resolution. The needle type probe works as a gradient meter which concurrently suppresses the influence of externally applied field and detects magnetic fields emanating from nano or micro order size sources. Sensing elements present high sensitivity 260 µV / µT and are capable of detecting the magnetic fields in order of few nT. SV-GMR elements present flat amplitude and phase characteristics in wide frequency range. The novel characteristicsof the probe allow it to be utilized in detection of the in-phase and out of phase signal components. An additional merit of this design is extremely small liftoff height between sensing element and the source of magnetic field. The SV-GMR elements are isolated only by very thin protection layer (a few µm), that gives opportunity to apply the probe in biological (in vivo) experiments, and in non destructive evaluation of current detection. The needle shape allows the sensing element toapproach the examined materials in a distance of few ten µm.

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Section: Estimation Of the Concentration Of Magnetic Fluid In Hyperthmentioning

confidence: 99%

Micron size GMR magnetic sensor with needle structure

Yamada¹,

Haraszczuk²,

Kakikawa³

et al. 2012

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Vision Tracking with Mean-shift and Particle Filtering Introduction of Mean-shift Algorithm Mean-shift is a common used algorithm in target tracking, which is a space analysis method based on non-parameterized core density estimation [10][11]. Under the situation that the probability density function is known, the position of maximum value can be determined by sampling data based on probability density function.…”

Section: Human Body Tracking and Motion Parameter Estimation Witmentioning

confidence: 99%

Research on Camera-Based Human Body Tracking using Improved CAM-SHIFT Algorithm

2015

International Journal on Smart Sensing and Intelligent Systems

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Abstract-Camera-based human body detection and tracking is an important research subject of computer vision, which has a widely used in the field of military and civil. In this paper, we focus on the technology of human body tracking based on improved camshaft algorithm. Firstly, we introduce some common image noise reduction algorithms. By combination the frame difference and background subtraction methods, an improved moving target detection algorithm is proposed, by which the whole region of target can be detected. Then, with the analysis of particle filtering and traditional Cam-shift algorithm, we introduce a new human body tracking method that is able to choose the target automatically due to the detection result. On the basis of the detection and tracking results, the algorithm of motion parameter estimation is analyzed. Finally, a set of human body detection and tracking experiments are designed to demonstrate the effectiveness of the proposed algorithms.

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“…For instance, the magnetic sensors are classified according to how sensitive they are for detecting the magnetic fields [16].…”

Section: Experimental Setup and Measurement Conditionsmentioning

confidence: 99%

Characterization of a Needle-Type Giant Magnetoresistance Sensor for Detection of Escherichia Coli’S Magnetic Marker

Shirzadfar

Nadi

Kourtiche

et al. 2015

International Journal on Smart Sensing and Intelligent Systems

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Abstract-In the recent years, the introduction and development of simple and portable sensors has been the focus of researchers in nearly all scientific domains, particularly in the biomedical settings.Giant magnetoresistance (GMR) provides a cutting-edge sensor technology. The GMR-based sensors are capable to affordably and sensitively detect and quantify micro-and nano-magnetic particles, even in very weak magnetic fields.In this paper, we introduce a highly sensitive needle-type GMR-based sensor, designed for the identification and quantification of Escherichia coli O157:H7 bacteria covered by superparamagnetic beads, Dynabeads® MAX E.coli O157. The sensor characteristics, measurement system setup and the properties of the magnetic marker solution are discussed in detail.Index terms: Giant magnetoresistance (GMR) sensor, Escherichia coli O157:H7, magnetic marker, sensor sensitivity, magnetic fluid weight density, magnetic field.

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Detection of Magnetic Fluid Volume Density with a GMR Sensor

Cited by 29 publications

References 5 publications

Micron size GMR magnetic sensor with needle structure

Micron size GMR magnetic sensor with needle structure

Research on Camera-Based Human Body Tracking using Improved CAM-SHIFT Algorithm

Characterization of a Needle-Type Giant Magnetoresistance Sensor for Detection of Escherichia Coli’S Magnetic Marker

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