Electrical Joining of Paper-Based Multilayer Magneto-Resistive Sensor Stacks

2020 ◽  
Vol 142 (2) ◽  
Author(s):  
Meriem Akin ◽  
Jennifer Blackburn ◽  
Autumn Pratt ◽  
Andreas Dietzel
Keyword(s):  
Mechanical Reliability ◽  
Motion Sensing ◽  
Film Sensor ◽  
Paper Electronics ◽  
New Development ◽  
Resistive Sensor ◽  
Layer Thin Film ◽  
Process Complexity ◽  
The Magnetic Field ◽  
Magnetoresistive Sensitivity

Abstract With the increase in the new development of paper electronics, there is a great demand for paper-compatible and reliable electrical joining techniques. In this work, we particularly addressed the interconnecting of multilayers of paper-based magneto-electronics. We deployed three room-temperature electrical joining techniques: (i) through-paper via, (ii) mechanical caulking, and (iii) collapsible daisy chain to fabricate an anisotropic magnetoresistive five-layer thin film sensor stack for planar rotary motion sensing. We studied the interplay between the electrical joining technique and the sensor characteristics such as magnetoresistive sensitivity and asymmetries in the sensor signal within the magnetic field strength domain. Despite process complexity and the precision limitations of manual machining and positioning, deployed in this work, the sensor stacks prepared by the through-paper via technique exhibited the closest uniformity in the magnetization planes across the stack, and hence the highest cumulative magnetoresistive sensitivity and lowest unfavorable asymmetries. Last, using peeling tests, we verified the mechanical reliability of the interconnects prepared by the through-paper via and collapsible daisy chain techniques.

Changes in the Magnetic Fields of Star-Shaped JIS-SKS93 Plates Embedded in Clear Acrylic Cold Mounting Resin under Tensile Stress

2012 ◽  
Vol 457-458 ◽  
pp. 884-890
Author(s):  
Megumi Uryu ◽  
Katsuyuki Kida ◽  
Takashi Honda ◽  
Kenichi Saruwatari ◽  
Edson Costa Santos ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stress Concentration ◽  
Magnetic Fields ◽  
Three Dimensional ◽  
Steel Specimen ◽  
Acrylic Resin ◽  
Steel Sample ◽  
Hall Probe ◽  
Film Sensor ◽  
The Magnetic Field

Fatigue failure of machine components occurs when cracks form in the stress concentration area and propagate under continued loading during component work. In order to understand the relation between the phenomena of stress concentration and crack propagation, non-destructive evaluation methods using in-situ measurements in the stress concentration areas are necessary. In the present work, a scanning Hall probe microscope (SHPM) equipped with a GaAs film sensor was developed and the three dimensional magnetic fields were observed at room temperature in air. The effect of stress on the changes in the magnetic field in steel components is reported. A steel specimen (JIS SKS93) embedded in acrylic resin were strained at different loads and the magnetic field before and after straining were observed. The obtained magnetic images clearly corresponded with the shape of the steel plate. It was possible to measure the changes in the magnetic field of the steel sample after straining under tensile loading, by neutralizing the initial magnetic field of the specimens prior to testing.

A Novel Bi-Layer Thin Film Sensor System for Registering Cardio-Respiratory Activity

2007 ◽  
Vol 5 (1) ◽  
pp. 215-217 ◽  
Author(s):  
G. S. Katranas ◽  
T. Meydan ◽  
T. A. Ovari ◽  
F. Borza
Keyword(s):  
Thin Film ◽  
Respiratory Activity ◽  
Sensor System ◽  
Film Sensor ◽  
Thin Film Sensor ◽  
Layer Thin Film

scholarly journals The Influence of Incident Power on the Magnetic Fluid Sensor Sensitivity Based on Optical Transmission Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Yongqian Li ◽  
Hao Zhang ◽  
Zhi Yang ◽  
Baoyi Yuan ◽  
Ze Yuan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Optical Transmission ◽  
Incident Power ◽  
Field Range ◽  
Film Sensor ◽  
Transmission Properties ◽  
Fluid Sensor ◽  
The Magnetic Field ◽  
Higher Sensitivity

Sensitivity is a critical characteristic of sensors, and increasing the sensitivity of the sensor is valuable for measurement study. Incident power has an important influence on the sensitivity of magnetic fluid sensors based on optical transmission properties. Variation in the magnetic field sensitivity at different incident powers was investigated by the measurement of transmitted power through the magnetic fluid sensors. As the magnetic field strength increases, the sensitivity variation of the magnetic fluid film sensor can be divided into four stages: first decreasing sharply, secondly increasing, then decreasing gradually, and finally tending toward a small stable value. The magnitudes of the change in the sensor sensitivity are influenced by the incident power, because the structural pattern of the nano-magnetic particles in the magnetic fluid sensor changes, the Soret effect and the Photonic Hall effect co-define the sensing system. In the weak magnetic field range, when a higher sensitivity is required, it is appropriate to select a larger incident power; however, in a large magnetic field range, when a higher sensitivity is required, a small incident power should be selected. Therefore, the magnetic fluid film sensor exhibits different sensitivity characteristics if different incident power values are chosen. The appropriate incident power can be selected according to the range of the magnetic field to be measured to improve the sensitivity in the magnetic field measurement study.

scholarly journals FPGA Implementation of Image Ordering and Packing Algorithm for TuMag Camera

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1706
Author(s):  
Eduardo Magdaleno ◽  
Manuel Rodríguez Valido ◽  
David Hernández ◽  
María Balaguer ◽  
Basilio Ruiz Cobo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Image Data ◽  
Image Sensor ◽  
Fpga Implementation ◽  
Processing Unit ◽  
The Sun ◽  
Packing Algorithm ◽  
New Development ◽  
The Magnetic Field ◽  
Frame Grabber

The TuMag instrument is a Tunable Magnetograph that has been designed to measure the magnetic field of the sun. This instrument and others will be connected to a telescope that will be sent into the stratosphere using a balloon for an uninterrupted observation of the sun for four days in the summer of 2022. The TuMag camera is a new development for implementing the image detector of the instrument. It is based on the GPIXEL GSENSE400-BSI scientific CMOS image sensor and an FPGA device in charge of controlling the image sensor, configuring it and grabbing images. FPGA device consists of an array of Configurable Logic Blocks. However, the sensor does not supply the image data in a row-by-column format. This task has to be done in the FPGA that controls the sensor because the frame grabber has a significant workload with the control of all the instruments, the telescope, the refrigeration, the navigation, and so on. This work describes the FPGA implementation of Image Ordering and Packing algorithm for TuMag Camera concerning the real-time ordering of the images before grabbing and sending to the Data Processing Unit.

Research on Failure Mechanism and Thermal Stress of Thin-film Thermocouple at High Temperature

2022 ◽  
Vol 905 ◽  
pp. 184-191
Author(s):  
Ting Chun Hu ◽  
Jia Fei Wang ◽  
Yi Yun Xi ◽  
Yu Feng Sun
Keyword(s):  
Thin Film ◽  
Thermal Stress ◽  
High Temperature ◽  
Failure Mechanism ◽  
Turbine Blades ◽  
Theoretical Models ◽  
Element Analysis ◽  
Film Sensor ◽  
Thin Film Thermocouple ◽  
Layer Thin Film

Aiming at the reliability of thin-film thermocouples applied to turbine blades at high temperatures, combined with high-temperature tests and finite element analysis, this paper studies its failure mechanism and thermal stress under thermal load. Multi-layer thin-film thermocouple samples were prepared on ceramic substrate, and high-temperature tests were carried out under different temperature loads, and the phenomenon of film shedding and cracking was observed using electron microscope. This paper analyzes the failure mechanism of the film sensor based on the function and structure, and uses ANSYS to analyze the thermal stress distribution of the film under high temperature load. Combining several existing theoretical models, this paper analyzes the factors affecting the thermal stress of the film and conducts simulation verification.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Emergence of Twisted Magnetic Flux Related Sigmoidal Brightening

2000 ◽  
Vol 179 ◽  
pp. 263-264
Author(s):  
K. Sundara Raman ◽  
K. B. Ramesh ◽  
R. Selvendran ◽  
P. S. M. Aleem ◽  
K. M. Hiremath
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Flux ◽  
Ultra Violet ◽  
Active Regions ◽  
Morphological Properties ◽  
Energy Storage And Conversion ◽  
The Sun ◽  
X Rays ◽  
The Magnetic Field

Extended AbstractWe have examined the morphological properties of a sigmoid associated with an SXR (soft X-ray) flare. The sigmoid is cospatial with the EUV (extreme ultra violet) images and in the optical part lies along an S-shaped Hαfilament. The photoheliogram shows flux emergence within an existingδtype sunspot which has caused the rotation of the umbrae giving rise to the sigmoidal brightening.It is now widely accepted that flares derive their energy from the magnetic fields of the active regions and coronal levels are considered to be the flare sites. But still a satisfactory understanding of the flare processes has not been achieved because of the difficulties encountered to predict and estimate the probability of flare eruptions. The convection flows and vortices below the photosphere transport and concentrate magnetic field, which subsequently appear as active regions in the photosphere (Rust & Kumar 1994 and the references therein). Successive emergence of magnetic flux, twist the field, creating flare productive magnetic shear and has been studied by many authors (Sundara Ramanet al.1998 and the references therein). Hence, it is considered that the flare is powered by the energy stored in the twisted magnetic flux tubes (Kurokawa 1996 and the references therein). Rust & Kumar (1996) named the S-shaped bright coronal loops that appear in soft X-rays as ‘Sigmoids’ and concluded that this S-shaped distortion is due to the twist developed in the magnetic field lines. These transient sigmoidal features tell a great deal about unstable coronal magnetic fields, as these regions are more likely to be eruptive (Canfieldet al.1999). As the magnetic fields of the active regions are deep rooted in the Sun, the twist developed in the subphotospheric flux tube penetrates the photosphere and extends in to the corona. Thus, it is essentially favourable for the subphotospheric twist to unwind the twist and transmit it through the photosphere to the corona. Therefore, it becomes essential to make complete observational descriptions of a flare from the magnetic field changes that are taking place in different atmospheric levels of the Sun, to pin down the energy storage and conversion process that trigger the flare phenomena.

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