Modular Data Acquisition Architecture for Thin-Film Sensors Surfaces

2020 ◽  
Author(s):  
Nelson Rodrigues ◽  
Jose Lima ◽  
Pedro Joao Rodrigues ◽  
Jose Augusto Carvalho ◽  
Jorge Laranjeira ◽  
...  
Keyword(s):  
Thin Film ◽  
Data Acquisition ◽  
Thin Film Sensors ◽  
Modular Data

Measuring activation patterns of the heart at a microscopic size scale with thin-film sensors

1994 ◽  
Vol 266 (5) ◽  
pp. H2136-H2145 ◽  
Author(s):  
E. Hofer ◽  
G. Urban ◽  
M. S. Spach ◽  
I. Schafferhofer ◽  
G. Mohr ◽  
...  
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Data Acquisition ◽  
Three Dimensional ◽  
Electrode Array ◽  
Activation Patterns ◽  
Thin Film Sensors ◽  
Amplitude Resolution ◽  
Spread Of Excitation ◽  
Database Program

To study the spread of excitation in ventricular heart preparations we have designed a fast, high-resolution recording and mapping system. Papillary muscles were dissected from the isolated guinea pig hearts. The preparation was fixed in a tissue bath and superfused with Tyrode solution. Linear and two-dimensional arrays of Ag/AgCl electrodes were made on glass with a thin-film technique. The transparent sensors with up to 24 electrodes (spaced 50, 90, or 180 microns apart) were positioned close to the surface of the preparation with a custom-designed three-dimensional micromanipulator. Extracellular signals were simultaneously recorded by a 24-channel data acquisition system with a 200 kHz per channel sample rate, with 12-bit amplitude resolution and a maximum data length of up to 3 MB. Digitized video images of the electrode array and the underlaying preparation were used to identify the locations of the recording sites. A UNIX-based computer system with a custom-designed data acquisition and database program was used to control the instruments and to manage the experimental data. This technique gave signals with excellent signal-to-noise ratios (up to 65 dB) and permitted accurate evaluation of the time and the site of the local activation with high resolution (to within 5 microseconds, 50 microns). We describe the spread of excitation within the area of a few cells and found a substantial dispersion of conduction velocities. Beat-to-beat comparison of activation patterns showed relatively small variations in the spread of excitation (a few microseconds).

scholarly journals Development of thin-film based sensors for temperature and tool wear monitoring during machining

2020 ◽  
Vol 87 (12) ◽  
pp. 768-776
Author(s):  
Marcel Plogmeyer ◽  
Germán González ◽  
Volker Schulze ◽  
Günter Bräuer
Keyword(s):  
Thin Film ◽  
Physical Vapor Deposition ◽  
Control Mechanisms ◽  
Insulation Layer ◽  
Sensor Layer ◽  
Thin Film Sensors ◽  
Wear Protection ◽  
Cutting Inserts ◽  
Wear Monitoring ◽  
Machining Operations

AbstractThe development of thin-film sensors for temperature and wear measurement in machining operations is presented in this work. A functional thin-film system, consisting of an Al2O3 insulation layer, a chromium sensor layer structured by photolithography and an Al2O3 wear-protection and insulation layer, is deposited by physical vapor deposition (PVD) processes onto the surface of cemented carbide cutting inserts. First specimen of the sensors are successfully fabricated and tested in laboratory experiments as well as in machining operations to demonstrate their functionality. These tool-integrated sensors can be used as an in-process monitoring device to determine the temperatures on the rake face at or close to the tool-chip contact area and to measure the progress of the flank-wear land width. The knowledge of these important process parameters opens up the possibility to develop new in-process control mechanisms in order to modify and improve the surface integrity of manufactured components. Thereby, their performance and lifetime can be enhanced.

Fabrications of the Smart Thin Film Sensors on the Very Thin Oxidized Alumina of PtAl Substrate

2021 ◽  
Author(s):  
Ziyi Xie ◽  
Franklin L. Duan ◽  
Lingyi Qian ◽  
Zebin Bao
Keyword(s):  
Thin Film ◽  
Thin Film Sensors

scholarly journals A review on thin films, conducting polymers as sensor devices

2022 ◽  
Author(s):  
E.L. Veera Prabakaran ◽  
K Senthil Vadivu ◽  
B Mouli Prasanth
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Environmental Conditions ◽  
Future Research ◽  
Physical Parameters ◽  
Research Needs ◽  
Future Perspectives ◽  
Thin Film Technology ◽  
Thin Film Sensors ◽  
Sensor Devices

Abstract Thin film sensors are used to monitor environmental conditions by measuring the physical parameters. By using thin film technology, the sensors are capable of conducting precise measurements. Moreover, the measurements are stable and dependable. Furthermore, inexpensive sensor devices can be produced. In this paper, thin film technology for the design and fabrication of sensors that are used in various applications is reviewed. Further, the applications of thin film sensors in the fields of biomedical, energy harvesting, optical, and corrosion applications are also presented. From the review, the future research needs and future perspectives are identified and discussed.

Doped Thin-Film Sensors via a Sol−Gel Process for High-Acidity Determination

1997 ◽  
Vol 69 (15) ◽  
pp. 3076-3080 ◽  
Author(s):  
Leonardo R. Allain ◽  
Karn Sorasaenee ◽  
Ziling Xue
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
High Acidity ◽  
Thin Film Sensors ◽  
Sol Gel Process

Halochromic optical nose for assessment of spoilage of packed seer fish

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kesavan Devarayan ◽  
Kopperundevi Sivakami Nagaraju ◽  
Padmavathi Pandiyan
Keyword(s):  
Thin Film ◽  
Real Time ◽  
Design Methodology ◽  
Real Time Monitoring ◽  
Content Type ◽  
Color Changes ◽  
Thin Film Sensors ◽  
Unique Color ◽  
Indicator Dyes ◽  
Seer Fish

Purpose The present study aims to describe the development of halochromic thin film sensors using mixed indicator dyes for monitoring the spoilage of packed seer fish. Design/methodology/approach Thin film was prepared using renewable polysaccharide incorporated with mixed indicator dyes. The thin film was characterized using ultraviolet visible and Fourier transform-infrared spectroscopy. The characteristics of the thin film were studied by analyzing the CIELAB and Red Green Blue values and biodegradability. The thin films were evaluated for real-time monitoring of the spoilage of packed seer fish. Findings The thin film sensors were found to exhibit excellent halochromism. The color changes were visible and distinguishable. The sensors responded efficiently for real-time monitoring of spoilage of fish by showing unique color changes. Originality/value This study provides promising mixed indicator that exhibits different colors in the alkaline pH. Also the present study reveals a potential combination of materials for preparation of halochromic sensors that can be used for monitoring the spoilage of packed seer fish in real time.

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