Implementation of inductive proximity sensor using nanoporous anodic aluminum oxide layer

Lo, Pei-Hsuan; Hong, Chang Sun; Lo, Shou-Chih; Fang, Weileun

doi:10.1109/transducers.2011.5969829

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…It was concluded that AAO/Al structure could be used to fabricate metal oxide gas sensors successfully. Lo et al [125] used anodic aluminum oxide with nanopores of about 50-60 nm to implement inductive proximity sensors. The anodic aluminum oxide was used as a template for patterning spiral film of gold.…”

Section: Aao Membrane In Sensors 331 Applications Of Aao Membrane In ...mentioning

confidence: 99%

Recent Progress of Fabrication, Characterization, and Applications of Anodic Aluminum Oxide (AAO) Membrane: A Review

Manzoor¹,

Ashraf²,

Tayyaba³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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The progress of membrane technology with the development of membranes with controlled parameters led to porous membranes. These membranes can be formed using different methods and have numerous applications in science and technology. Anodization of aluminum in this aspect is an electro-synthetic process that changes the surface of the metal through oxidation to deliver an anodic oxide layer. This process results in a self-coordinated, exceptional cluster of round and hollow formed pores with controllable pore widths, periodicity, and thickness. Categorization in barrier type and porous type films, and different methods for the preparation of membranes, have been discussed. After the initial introduction, the paper proceeds with a brief overview of anodizing process. That engages anodic aluminum oxide (AAO) layers to be used as formats in various nanotechnology applications without the necessity for expensive lithographical systems. This review article surveys the current status of the investigation on AAO membranes. A comprehensive analysis is performed on AAO membranes in applications; filtration, sensors, drug delivery, template-assisted growth of various nanostructures. Their multiple usages in nanotechnology have also been discussed to gather nanomaterials and devices or unite them into specific applications, such as nano-electronic gadgets, channel layers, and clinical platforms tissue designing. From this review, the fact that the specified enhancement of properties of AAO can be done by varying geometric parameters of AAO has been highlighted. No review paper focused on a detailed discussion of multiple applications of AAO with prospects and challenges. Also, it is a challenge for the research community to compare results reported in the literature. This paper provides tables for easy comparison of reported applications with membrane parameters. This review paper represents the formation, properties, applications with objective consideration of the prospects and challenges of AAO applications. The prospects may appeal to researchers to promote the development of unique membranes with functionalization and controlled geometric parameters and check the feasibility of the AAO membranes in nanotechnology and devices.

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Section: Aao Membrane In Sensors 331 Applications Of Aao Membrane In ...mentioning

confidence: 99%

Recent Progress of Fabrication, Characterization, and Applications of Anodic Aluminum Oxide (AAO) Membrane: A Review

Manzoor¹,

Ashraf²,

Tayyaba³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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“…For instance, capacitive sensors have been used in positioning [15], [16]; humidity sensing [17], [18]; tilt sensing [19], [20]; pressure sensing [21]; and MEMS-based sensing [21]. Capacitors have also been applied as proximity sensors with applications to robotics, industrial monitoring and healthcare applications [22], [23], [24]. Products like Microchip's GestIC [25] have been introduced which allow for 3D gesture tracking using capacitive sensing using a rigidly-defined array shape.…”

Section: Related Workmentioning

confidence: 99%

Inviz: Low-power personalized gesture recognition using wearable textile capacitive sensor arrays

Singh

Nelson

Robucci

et al. 2015

2015 IEEE International Conference on Pervasive Computing and Communications (PerCom)

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Home automation and environmental control is a key ingredient of smart homes. While systems for home automation and control exist, there are few systems that interact with individuals suffering from paralysis, paresis, weakness and limited range of motion that are common sequels resulting from severe injuries such as stroke, brain injury, spinal cord injury and many chronic (guillian barre syndrome) and degenerative (amyotrophic lateral sclerosis) conditions. To address this problem, we present the design, implementation, and evaluation of Inviz, a low-cost gesture recognition system for paralysis patients that uses flexible textile-based capacitive sensor arrays for movement detection. The design of Inviz presents two novel research contributions. First, the system uses flexible textile-based capacitive arrays as proximity sensors that are minimally obtrusive and can be built into clothing for gesture and movement detection in patients with limited body motion. The proximity sensing obviates the need for touch-based gesture recognition that can cause skin abrasion in paralysis patients, and the array of capacitive sensors help provide better spatial resolution and noise cancellation. Second, Inviz uses a low-power hierarchical signal processing algorithm that breaks down computation into multiple low and high power tiers. The tiered approach provides maximal vigilance at minimal energy consumption. We have designed and implemented a fully functional prototype of Inviz and we evaluate it in the context of an end-to-end home automation system and show that it achieves high accuracy while maintaining low latency and low energy consumption.

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“…For instance, capacitive sensors have been used in positioning [13], humidity sensing [14], tilt sensing [15], pressure sensing [16], and MEMS-based sensing [16]. The proximity sensor is a critical device with applications to robotics, industrial monitoring, mobile phone touch screens and healthcare [17], [18]. Our approach extends this body of work in two ways.…”

Section: Related Workmentioning

confidence: 99%

Gait Analysis for Fall Prediction Using Hierarchical Textile-Based Capacitive Sensor Arrays

Baldwin

Bobovych

Robucci

et al. 2015

Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition (DATE), 2015

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Falls are a major cause of injuries in adults above the age of sixty-five. The economic aftermath of falls and their consequent hospitalization can be huge, totaling more than 30 billion dollars in 2010 alone. A plausible way of mitigating this problem is accurate prediction of future falls and taking proactive remedial action. Spatio-temporal variation in gait is a reliable indicator of a future fall, however, existing systems focus on gait analysis in clinical settings and are not tuned towards continuous gait analysis. In this paper, we present the design of a novel textile capacitive sensor array-based system built into clothing that can reliably capture spatio-temporal gait attributes in a home setting.A key novel research contribution of our work is a context-aware hierarchical signal processing architecture that breaks down the signal processing algorithm into a hierarchy of processing elements. The lower power processing components perform generic feature extraction using observations derived from the capacitor plates, while the higher-level processors aggregate features to infer gait attributes such as stride speed and inter-leg spacing. The system activates the higher power processing elements only when it detects walking. We have prototyped our system using textile capacitive plates built into an ace-bandage and a custom FPGA-based system and show that our system can accurately detect gait attributes that have high correlation with falls, while consuming minimal energy as estimated for a multi-clock-domain 180-nm IC.Research Contributions: The design, implementation, and evaluation of our prototype system presents three novel research contributions.(a) Wearable textile-based capacitive sensor arrays (CSAs) for gait analysis: We present the use of flexible

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Implementation of inductive proximity sensor using nanoporous anodic aluminum oxide layer

Cited by 9 publications

References 13 publications

Recent Progress of Fabrication, Characterization, and Applications of Anodic Aluminum Oxide (AAO) Membrane: A Review

Recent Progress of Fabrication, Characterization, and Applications of Anodic Aluminum Oxide (AAO) Membrane: A Review

Inviz: Low-power personalized gesture recognition using wearable textile capacitive sensor arrays

Gait Analysis for Fall Prediction Using Hierarchical Textile-Based Capacitive Sensor Arrays

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