Magnetic micropillar sensors for force sensing

Alfadhel, Ahmed; Kosel, Jürgen

doi:10.1109/sas.2015.7133654

Cited by 10 publications

(13 citation statements)

References 14 publications

(17 reference statements)

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“…Examples are nanocomposite materials, which combine the advantages of polymers-like flexibility, elasticity, chemical resistance or biocompatibility with the unique properties of the additive. Magnetic nanocomposites in which magnetic beads [8][9][10] or nanowires (NWs) [7,[11][12][13] are included in the polymer matrix enable remote control for heating, actuation or sensing. Fe NWs have a high magnetization in the absence of a magnetic field, due to the strong shape anisotropy, and they can be easily fabricated with a cost effective electrochemical process [14].…”

Section: Introductionmentioning

confidence: 99%

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A single magnetic nanocomposite cilia force sensor

Alfadhel

Khan

Cardoso

et al. 2016

2016 IEEE Sensors Applications Symposium (SAS)

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The advancements in fields like robotics and medicine continuously require improvements of sensor devices and more engagement of cooperative sensing technologies. For example, instruments such as tweezers with sensitive force sensory heads could provide the ability to sense a variety of physical quantities in real time, such as the amount and direction of the force applied or the texture of the gripped object. Force sensors with such abilities could be great solutions toward the development of smart surgical tools. In this work, a unique force sensor that can be integrated at the tips of robotic arms or surgical tools is reported. The force sensor consists of a single bioinspired, permanent magnetic and highly elastic nanocomposite cilia integrated on a magnetic field sensing element. The nanocomposite is prepared from permanent magnetic nanowires incorporated into the highly elastic polydimethylsiloxane. We demonstrate the potential of this concept by performing several experiments to show the performance of the force sensor. The developed sensor element has a 200 µm in diameter single cilium with 1:5 aspect ratio and shows a detection range up to 1 mN with a sensitivity of 1.6 Ω/mN and a resolution of 31 µN. The simple fabrication process of the sensor allows easy optimization of the sensor performance to meet the needs of different applications.

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Section: Introductionmentioning

confidence: 99%

“…A tactile sensor [7,12] and a flow sensor [11] have been reported previously using a similar concept but with an array of cilia integrated on a high frequency magnetic sensor to realize a single sensing element. Here we are moving toward miniaturization to a single cilium sensor, which provides a high spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

A single magnetic nanocomposite cilia force sensor

Alfadhel

Khan

Cardoso

et al. 2016

2016 IEEE Sensors Applications Symposium (SAS)

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“…developed a magnetic nanocomposite cilia tactile sensor made of iron nanowires incorporated into polydimethylsiloxane (PDMS). The applied mechanical force on the sensor provoke a change on the cilia's magnetic field, created by the iron nanowires .…”

Section: Touchmentioning

confidence: 99%

“…These sensors detect changes in the magnetic flux induced by an applied force.T he magnetic flux is measured by ad evice whose magnetic properties are dependentt o the force.U sing am agnetoelastic material for the core of an inductor its electrical parameters changew hen force is appliedt ot he core.T heses ensors have high sensitivity, low hysteresis,w ide dynamic range,b ut they are bulkyi n size,s usceptible to magnetic interference and noise.A lfadhel et al developed am agnetic nanocomposite cilia tactile sensor made of iron nanowiresi ncorporated into polydimethylsiloxane (PDMS). Thea pplied mechanical force on the sensorp rovokeachange on the ciliasm agnetic field, created by the iron nanowires [ 248].…”

Section: Magnetic Tactile Sensorsmentioning

confidence: 99%

Sensor Devices Inspired by the Five Senses: A Review

Svechtarova¹,

Buzzacchera²,

Toebes³

et al. 2016

Electroanalysis

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1IntroductionWearable sensor technology is at the forefront of popular media and at the same time is the subject of intense activity in the scientific world. Thes cientificallyd rivenq uantified self focuseso nc ollecting data on the human state to gather information to improve quality of life,t he more extreme end of the spectrume ncompasses biohacktivism and the post-humanist grinderm ovementa dvocating the use of DIY implants to augment the human body to at ranshuman state. [1][2][3][4][5][6][7][8][9][10][11][12][13].T he focus of the current state of the mainstreama rt rests in augmenting the body with ar ange of relatively simplistica rtificial sensors such as temperature,a ccelerometers for posture and motion, electrocardiology,a nd basic chemical sensors sucha sg lucose monitors.I nf act the body is already at reasure-trove of informationa nd integrated sensor systems that are waitingt ob et apped by the next generation of wearable sensor devices.T he human brain like am odern computer or smartphone,c an process thousands of signals from various inputs in an instant. These primary senses were first definedb yA ristotle in Sense and Sensebilia [14] however it was rather Plato in Theateus that first postulated to humansa nd animals being an etwork of "perceptions" when Socratess tatedt hat "The nameless ones are unlimited in number, but those which have been given names are extremely numerous" [15].J ust as am odern smartphone incorporates multiple sensors such as gyroscope, accelerometer, magnetometer and barometers in concert to accurately determine,a ggregate and presents implified locationa nd orientation information to the end user each of the five traditional perceptionsa re the result of multiple sensory functionsw ithin the human body.Fort he purpose of thisr eview we classify the multitude of sensory systems into the Aristotle model of five key senses used to gather information about the outside world. Theh uman body represents an immense source of data collection aggregation and archiving relating to surroundings,b iochemical and temporal processes that allow the brain to understand the environment and its effecto n the body in real time.T he potential to access such ah uge reservoir of data that can be captured from existing bodily sensor systems is the next greatest challengei n sensor development. Rather than develop ever more complicated sensor devices the biggest challenge is how to interface with the existing bodily data streams and harvestt his information to aid in diagnostics,h ealth and wellbeing.Between detectiona nd conscious sensationt herei so ne more essential step that holds the key to accessing the human big data set:d igitalization. In computer terms this is what happens between the first tap of ak ey on ak eyboard and its visualization on the computers creen.W ith computers the processi sr elatively simple,p ushingakey simply closes ac ircuit generating ac urrentt hat travels to the processing unit, where its unique pattern is decoded and translated to the character [16].Inthe b...

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“…The DC operated sensor can detect static and dynamic forces as well as vibration and fluid flow. This paper is a progressive work of a previously reported tactile sensor [14,15] and a flow sensor [9] that uses a similar concept but with a high frequency magnetic sensor to detect the stray field of the cilia. Here we move to DC operation by using GMR sensors to simplify the required circuitry and to allow the realization of arrays with small sensing pixels.…”

Section: Introductionmentioning

confidence: 99%