Capacitive Sensors
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Capacitive Sensors
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Author : Larry K. Baxter
language : en
Publisher: John Wiley & Sons
Release Date : 1996-09-03
Capacitive Sensors written by Larry K. Baxter and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-09-03 with Technology & Engineering categories.
Capacitive sensors produce spectacular resolution of movement to one part in 10-10 meters and maintain exceptional long-term stability in hostile environments. They are increasingly used for a variety of jobs in consumer and industrial equipment, including wall stud sensors, keypads, lamp dimmers, micrometers, calipers, rotation encoders, and more. The most focused, authoritative book available in the field, Capacitive Sensors brings you complete information on the research, design, and production of capacitive sensors. This all-in-one source provides detailed, comprehensive coverage of key topics, including underlying theory, electrode configuration, and practical circuits. In addition, you'll find reviews of a number of tested systems never before published. Capacitive Sensors is a must-have for product designers and mechanical and electrical engineers interested in using this fast-developing technology to get top price and performance advantages.
Ultra Low Power Capacitive Sensor Interfaces
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Author : Wouter Bracke
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-06-15
Ultra Low Power Capacitive Sensor Interfaces written by Wouter Bracke and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-15 with Technology & Engineering categories.
This book describes ultra low power capacitive sensor interfaces, and presents the realization of a very low power generic sensor interface chip that is adaptable to a broad range of capacitive sensors. The book opens by reviewing important design aspects for autonomous sensor systems, discusses different building blocks, and presents the modular architecture for the generic sensor interface chip. Finally, the generic sensor interface chip is shown in state-of-the-art applications.
Electronic Interfaces For Differential Capacitive Sensors
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Author : Gianluca Barile
language : en
Publisher: CRC Press
Release Date : 2022-09-01
Electronic Interfaces For Differential Capacitive Sensors written by Gianluca Barile and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-01 with Technology & Engineering categories.
In a world where great efforts are spent designing and creating more complex, yet efficient systems, sensing elements and related readout circuits, which constitute an integral part of them, need to be designed fulfilling these constraints, beside the common key parameters, such as high sensitivity, resolution and accuracy. Capacitive sensors and their differential subset provide virtually no energy dissipation, show insensitivity to temperature variations and have the capability to be micromachined directly onto a silicon substrate, together with the readout interface. Designing a readout circuit that takes advantage of these benefits, according to any specific application, is thus of utmost importance. This volume introduces the reader to state-of-the-art techniques and research achievements in interfacing differential capacitance sensors. Technical topics discussed in the book include:▪ Switched capacitor based interfaces;▪ Voltage mode, differential capacitance to time, voltage, digital converters;▪ Current mode interfaces based on standard components;▪ Current mode interfaces based on CCIIs and VCIIs;▪ Principles of second generation current and voltage conveyors. This book gives the reader a comprehensive overview on the working principles, equivalent circuit models and most advanced interfacing techniques for differential capacitive transducers, highlighting benefits and downsides of each option. Electronic interfaces for differential capacitive sensors is an ideal text for academic staff and Masters/research students in electronic and microelectronic engineering.
Cmos Capacitive Sensors For Lab On Chip Applications
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Author : Ebrahim Ghafar-Zadeh
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
Cmos Capacitive Sensors For Lab On Chip Applications written by Ebrahim Ghafar-Zadeh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Technology & Engineering categories.
1.1 Overview of Lab-on-Chip Laboratory-on-Chip (LoC) is a multidisciplinary approach used for the miniaturization, integration and automation of biological assays or procedures in analytical chemistry [1–3]. Biology and chemistry are experimental sciences that are continuing to evolve and develop new protocols. Each protocol offers step-by-step laboratory instructions, lists of the necessary equipments and required biological and/or chemical substances [4–7]. A biological or chemical laboratory contains various pieces of equipment used for performing such protocols and, as shown in Fig. 1.1, the engineering aspect of LoC design is aiming to embed all these components in a single chip for single-purpose applications. 1.1.1 Main Objectives of LoC Systems Several clear advantages of this technology over conventional approaches, including portability, full automation, ease of operation, low sample consumption and fast assays time, make LoC suitable for many applications including. 1.1.1.1 Highly Throughput Screening To conduct an experiment, a researcher fills a well with the required biological or chemical analytes and keeps the sample in an incubator for some time to allowing the sample to react properly. Afterwards, any changes can be observed using a microscope. In order to quickly conduct millions of biochemical or pharmacolo- cal tests, the researchers will require an automated highly throughput screening (HTS) [8], comprised of a large array of wells, liquid handling devices (e.g., mic- channel, micropump and microvalves [9–11]), a fully controllable incubator and an integrated sensor array, along with the appropriate readout system.
Capacitive Sensors
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Author :
language : en
Publisher:
Release Date : 1997
Capacitive Sensors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Capacitance meters categories.
Resistive Capacitive Inductive And Magnetic Sensor Technologies
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Author : Winncy Y. Du
language : en
Publisher: CRC Press
Release Date : 2014-12-09
Resistive Capacitive Inductive And Magnetic Sensor Technologies written by Winncy Y. Du and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-09 with Technology & Engineering categories.
Sensor technologies have experienced dramatic growth in recent years, making a significant impact on national security, health care, environmental improvement, energy management, food safety, construction monitoring, manufacturing and process control, and more. However, education on sensor technologies has not kept pace with this rapid development ... until now. Resistive, Capacitive, Inductive, and Magnetic Sensor Technologies examines existing, new, and novel sensor technologies and—through real-world examples, sample problems, and practical exercises—illustrates how the related science and engineering principles can be applied across multiple disciplines, offering greater insight into various sensors’ operating mechanisms and practical functions. The book assists readers in understanding resistive, capacitive, inductive, and magnetic (RCIM) sensors, as well as sensors with similar design concepts, characteristics, and circuitry. Resistive, Capacitive, Inductive, and Magnetic Sensor Technologies is a complete and comprehensive overview of RCIM sensing technologies. It takes a unique approach in describing a broad range of sensing technologies and their diverse applications by first reviewing the necessary physics, and then explaining the sensors’ intrinsic mechanisms, distinctive designs, materials and manufacturing methods, associated noise types, signal conditioning circuitry, and practical applications. The text not only covers silicon and metallic sensors but also those made of modern and specialized materials such as ceramics, polymers, and organic substances. It provides cutting-edge information useful to students, researchers, scientists, and practicing professionals involved in the design and application of sensor-based products in fields such as biomedical engineering, mechatronics, robotics, aerospace, and beyond.
Low Cost Smart Capacitive Sensors For Position And Speed Measurement
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Author : Xiujun Li
language : en
Publisher:
Release Date : 1997
Low Cost Smart Capacitive Sensors For Position And Speed Measurement written by Xiujun Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
Rational Design Of Capacitive Sensors With Microstructured Dielectrics For Medical Devices And Robotics
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Author : Sara Rachel Arussy Ruth
language : en
Publisher:
Release Date : 2021
Rational Design Of Capacitive Sensors With Microstructured Dielectrics For Medical Devices And Robotics written by Sara Rachel Arussy Ruth and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Pressure and proximity sensors are widely used in the healthcare and robotics industries. Among other applications, they are used for patient monitoring and robotic surgery, playing an integral role in improving health and safety. Currently, there is an increasing demand for highly specialized sensors within these industries, but the path of designing such sensors can be very circular, requiring multiple redesigns. To better address this challenge, the process must be linearized by enabling more targeted sensor design. To achieve targeted design of sensors for specialized applications, there are five major objectives: (1) better understanding of current sensor technologies, (2) more reliable and reproducible sensor fabrication methods, (3) simple models to predict sensor performance, (4) design rules based on computational and experimental results to inform targeted sensor design, and (5) proven efficacy of the targeted design for specific applications. This dissertation goes through this process specifically for capacitive pressure and proximity sensors. Micro-engineered pressure sensors are of particular interest because of their high sensitivity, fast response, and low limits of detection. The micro-engineering techniques include micropatterned structures, porous layers, multilayered packed structures, and combined approaches, and are compared in terms of ease of fabrication, active layer uniformity, shape and size versatility and tunability, and scalability. Understanding the current sensor technologies, advantages of different sensor types, and fabrication methods led to a focus on capacitive pressure sensors with micropatterned structures. The fabrication method for capacitive pressure sensors was improved for consistency and reliability by introducing a lamination layer to anchor the micropatterned structures--pyramids in this case--to the second electrode. A series of equations modeling the dielectric layer as both a spring and electrical circuit was developed to predict sensor response and was confirmed experimentally. This model was then used to predict how a variety of design parameters impacted the sensitivity and initial capacitance of the sensor. Further, the model was expanded to include alternative microstructure geometries and more performance parameters, enabling a more extensive comparison of microstructure design. Once the dielectric layer of capacitive pressure sensors was better understood, an analysis of the effects of electrode design was investigated, specifically for fringe-field capacitive sensors capable of both pressure and proximity sensing. Four novel electrode designs were compared to a traditional parallel plate design. All fringe-field designs had proximity sensing capabilities, distinguish between pressure and proximity regimes, and distinguish between conductive and insulating materials, however only one could recapitulate most of the pressure sensing capabilities of the parallel plate capacitive sensor. Finally, the newly obtained sensor performance trends were applied to targetedly design a sensor for early detection and prevention of diseases after surgical vascular bypass or plaque removal. This sensor was effective in vitro, in vivo, and in a human cadaver without the need to redesign, thus demonstrating the efficacy of using the design guidelines developed for linear, targeted sensor design.
Emerging Cmos Capacitive Sensors For Biomedical Applications
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Author : Ebrahim Ghafar-Zadeh
language : en
Publisher: IET
Release Date : 2021-10-14
Emerging Cmos Capacitive Sensors For Biomedical Applications written by Ebrahim Ghafar-Zadeh and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-14 with Technology & Engineering categories.
Developing capacitive sensors for use in life sciences requires thorough knowledge of both the intended biological applications and CMOS circuitry. This book addresses the principles, design, implementation and testing, and packaging of CMOS circuits for biomedical applications, plus relevant biological protocols.
Analog Circuits And Systems For Voltage Mode And Current Mode Sensor Interfacing Applications
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Author : Andrea De Marcellis
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-06-29
Analog Circuits And Systems For Voltage Mode And Current Mode Sensor Interfacing Applications written by Andrea De Marcellis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-29 with Technology & Engineering categories.
Analog CMOS Microelectronic Circuits describes novel approaches for analog electronic interfaces design, especially for resistive and capacitive sensors showing a wide variation range, with the intent to cover a lack of solutions in the literature. After an initial description of sensors and main definitions, novel electronic circuits, which do not require any initial calibrations, are described; they show both AC and DC excitation voltage for the employed sensor, and use both voltage-mode and current-mode approaches. The proposed interfaces can be realized both as prototype boards, for fast characterization (in this sense, they can be easily implemented by students and researchers), and as integrated circuits, using modern low-voltage low-power design techniques (in this case, specialist analog microelectronic researchers will find them useful). The primary audience of Analog CMOS Microelectronic Circuits are: analog circuit designers, sensor companies, Ph.D. students on analog microelectronics, undergraduate and postgraduate students in electronic engineering.