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Book Integrated Smart Sensors

Download or read book Integrated Smart Sensors written by Gert van der Horn and published by Springer. This book was released on 2012-11-28 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 1. 1 Introduction The (signal processing and storage) capacity ofthe human brain enables us to become powerful autonomous beings, but only if our brains operate in conjunction with (at least some of) our senses and muscles. Using these organs, we can interact with our environment, learn to adapt, and improve important aspects of our life. Similarly, the signal processing capabilities of modern electronics (computers) could be combined with electronic sensors and actuators to enable interaction with, and adaptation to, the (non-electrical) environment. This willlead to smarter and more powerful automated tools and machines. To facilitate and stimulate such a development, easy-to-use low-cost sensors are needed. The combination of electronic interface functions and a sensor in an integrated smart sensor, that provides a standard, digital, and bus-compatible output, would simplify the connection of sensors to standard electronic signal processors (microcontrollers, computers, etc. ). Currently, the calibration procedure, required for standardization of the sensor output signal level, contributes largely to the production costs of accurate sensors. To enable automation of the calibration procedure, and hence reduce the sensor fabrication costs, a digital calibrationjunction should be included in the smart sensor. INTEGRATED SMART SENSORS: Design and Calibration Introduction 1. 2 Sensors and actuators In industry many processes are electronically controlled. As depicted in Fig.

Book MEMS Pressure Sensors Fabrication and Process Optimization

Download or read book MEMS Pressure Sensors Fabrication and Process Optimization written by Parvej Ahmad Alvi and published by Lulu.com. This book was released on 2014-07-14 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: MEMS Pressure Sensors: Fabrication and Process Optimization - describs the step by step fabrication process sequence along with flow chart for fabrication of micro pressure sensors taking into account various aspects of fabrication and designing of the pressure sensors as well as fabrication process optimization. A complete experimental detail before and after each step of fabrication of the sensor has also been discussed. This leads to the uniqueness of the book. MEMS Pressure Sensors: Fabrication and Process Optimization will greatly benefit undergraduate and postgraduate students of MEMS and NEMS courses. Process engineers and technologists in the microelectronics industry including MEMS-based sensors manufacturers.

Book Master s Theses Directories

Download or read book Master s Theses Directories written by and published by . This book was released on 2006 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Book Automated Calibration OfMulti Sensor Optical ShapeMeasurement System

Download or read book Automated Calibration OfMulti Sensor Optical ShapeMeasurement System written by Olatokunbo Omodele Ogundana and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-sensor optical shape measurement systems (SMS) based on the fringe projection method and temporal phase unwrapping has recently been commercialised as a result of its easy implementation, computer control using a spatial light modulator, and fast full-field measurement. The main advantage of a multi-sensor SMS is the ability to make measurements for 3600 coverage without the requirement for mounting the measured component on translation and/or rotation stages. However, for greater acceptance in industry, issues relating to a user-friendly calibration of the multi-sensor SMS in an industrial environment for presentation of the measured data in a single coordinate system need to be addressed. The calibration of multi-sensor SMSs typically requires a calibration artefact, which consequently leads to significant user input for the processing of calibration data, in order to obtain the respective sensor's optimal imaging geometry parameters. The imaging geometry parameters provide a mapping from the acquired shape data to real world Cartesian coordinates. However, the process of obtaining optimal sensor imaging geometry parameters (which involves a nonlinear numerical optimization process known as bundle adjustment), requires labelling regions within each point cloud as belonging to known features of the calibration artefact. This thesis describes an automated calibration procedure which ensures that calibration data is processed through automated feature detection of the calibration artefact, artefact pose estimation, automated control point selection, and finally bundle adjustment itself. The process of calibration artefact selection is discussed, with the objective of developing a low cost artefact, with appropriate geometric and material properties such as unobstructed viewing by sensors, low coefficient of thermal expansion and non-specular surface finish. Automated detection of calibration artefact features is investigated, for enhancing the ease, speed, and accuracy of calibration. A novel 3-D Hough transform based on an optimised sparse 3-D matrix model is described, including methods developed for efficient peak detection in the Hough accumulator space. The calibration results of a two-camera and two-projector optical SMS based on multiple poses of the respective calibration artefacts developed, are discussed. A comparison of usage of the calibration artefacts is also made in order to assess their practicable use in an industrial environment. Based on acquired shape data of one of the artefacts, calibration accuracy of about one part in 5,000 was achieved. In applications for product inspection and quality assessment, the measured data needs to be presented in a form that provides for visualisation on a computer. A method for efficiently tessellating the measured point cloud using sensor pixel neighbourhood information is described. This method provides for the presentation of the measured point cloud data in industry accepted file formats. In addition, the measured data of a component may need to be compared against an idealised model of the component e.g. a computer-aided design (CAD) model. Methods for matching the measured data to a CAD model are therefore also discussed. The results of calibrating a multi-sensor SMS at an industrial site are presented. In spite of a less well controlled environment, a calibration accuracy of about one part in 1,600 was achieved, with the SMS subsequently used as a valuable tool for measuring out-of-plane displacement during a series of structural tests.

Book NASA Technical Memorandum

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1990 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Tactile Sensors for Robotic Applications

Download or read book Tactile Sensors for Robotic Applications written by Salvatore Pirozzi and published by MDPI. This book was released on 2021-03-17 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers different aspects: - Innovative technologies for tactile sensors development - Tactile data interpretation for control purposes - Alternative sensing technologies - Multi-sensor systems for grasping and manipulation - Sensing solutions for impaired people

Book Integrated Smart Sensors

Download or read book Integrated Smart Sensors written by Gert van der Horn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 1. 1 Introduction The (signal processing and storage) capacity ofthe human brain enables us to become powerful autonomous beings, but only if our brains operate in conjunction with (at least some of) our senses and muscles. Using these organs, we can interact with our environment, learn to adapt, and improve important aspects of our life. Similarly, the signal processing capabilities of modern electronics (computers) could be combined with electronic sensors and actuators to enable interaction with, and adaptation to, the (non-electrical) environment. This willlead to smarter and more powerful automated tools and machines. To facilitate and stimulate such a development, easy-to-use low-cost sensors are needed. The combination of electronic interface functions and a sensor in an integrated smart sensor, that provides a standard, digital, and bus-compatible output, would simplify the connection of sensors to standard electronic signal processors (microcontrollers, computers, etc. ). Currently, the calibration procedure, required for standardization of the sensor output signal level, contributes largely to the production costs of accurate sensors. To enable automation of the calibration procedure, and hence reduce the sensor fabrication costs, a digital calibrationjunction should be included in the smart sensor. INTEGRATED SMART SENSORS: Design and Calibration Introduction 1. 2 Sensors and actuators In industry many processes are electronically controlled. As depicted in Fig.

Book Optimal Design of Experiment for Medical Sensors Calibration

Download or read book Optimal Design of Experiment for Medical Sensors Calibration written by and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a framework for the optimal design of experiments for medical sensors calibration. A new software program, G-optimal, is developed to demonstrate the optimal design of experiment. This program has been used to find G-optimal design for amperometric enzyme glucose sensor, silicon capacitive absolute pressure sensors and electrochemical oxygen and carbon dioxide partial pressure sensors. The developed software improves the calibration accuracy, reduces the calibration cost, decreases the time and effort required performing a calibration and provides user friendliness.

Book U S Government Research Reports

Download or read book U S Government Research Reports written by and published by . This book was released on 1962-07 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hyper sensitive MEMS Pressure Sensor Array for Microscale Bubble Pressure Measurement

Download or read book Hyper sensitive MEMS Pressure Sensor Array for Microscale Bubble Pressure Measurement written by Yash Rajan Rasaikar and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "As technology is advancing, more complex, efficient, and powerful devices are being made. These powerful devices generate a lot of heat which needs to be taken out to maximize their performance. Hence, efforts are being made to improve cooling techniques for these devices. Boiling is one such technique used in the cooling of devices. The heat transfer performance in the flow boiling systems is higher than that in pool boiling systems. With a simple add-on tapered manifold over a plain surface, we can convert pool boiling to flow boiling. This study will lead to improved performance and reliability of microelectronic devices, supercomputers, server chips, etc. The forces from bubbles growing can provide a pumpless, self-sustained unidirectional flow effectively transforming pool boiling into the extremely efficient flow boiling, resulting in energy savings. MEMS pressure sensor array will be mounted at the end of tapered manifold to map the pressure field around a nucleating bubble. The thesis describes the design, fabrication, packaging, and testing of a bulk micromachined sensor array that is capable of monitoring the pressure progression of a bubble. The sensor utilizes an extremely thin 225 nm square Si3N4 diaphragm which is produced by etching away the bulk silicon with XeF2 through holes present in the diaphragm. A unique process flow was developed to achieve the diaphragm thickness in nanometers. Four polysilicon piezoresistors, mounted on the surface of the diaphragm, where the stress is maximum, are used by the sensor. The thesis also discusses the results obtained from the response of the fabricated sensor. Various attempts were made to get a voltage output in response to applied pressure. These values were acquired over a number of experiments repeated at similar experimental conditions to demonstrate the repeatability of the calibration data. The value of sensitivity, derived from the slope of the linear calibration plot of Vout (V) vs. Pressure (Pa), is 5.26 [micro]V/Pa, which is very close to the required target hyper-sensitivity of 5 [micro]V/Pa."--Abstract.

Book NASA Aerodynamics Program Annual Report 1989

Download or read book NASA Aerodynamics Program Annual Report 1989 written by and published by . This book was released on 1990 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Design and Fabrication of an Optical Pressure Micro Sensor for Skin Mechanics Studies

Download or read book Design and Fabrication of an Optical Pressure Micro Sensor for Skin Mechanics Studies written by Siddarth Kumar and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The entire device is fabricated bottom up on a silicon wafer using soft lithography techniques and the textured pattern is imprinted onto the PDMS using photolithography techniques. This flexible pressure sensor is designed to be used on the fingerpad skin to determine the pressure distribution due to incident loads. The sensor is placed between the OCT head and the finger pad to be imaged. The OCT head (along with the indenter) acts as the mechanical stimulus and is used to indent the finger pad. As a result of this stimulus, the human skin along with the pressure sensor gets deformed and both these deformations are picked up by the OCT image. The deflection between the two bands of patterns is used to estimate the stress at the pressure sensor and skin interface through the development of a continuum mechanics model which is also developed and introduced in this thesis. The manufactured device is tested and calibrated for use with the fingerpad.