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Semiconductor chip manufacturing cost consists of die cost, package cost, and test cost. The trends of increasing design complexity, increasing quality needs, and new process nodes and defect models are pushing test cost to the forefront. This is especially true for high-resolution data converters, whose accurate testing requires expensive instruments and is extremely time-consuming. As a result, linearity test of data converters often dominates the overall test cost of SoCs. This talk will present several recently developed techniques for reducing linearity test cost by dramatically reducing measurement time and dramatically relaxing instrumentation requirements.
The IEEE standard for ADC linearity test requires the stimulus signal to be at least 10 times more accurate than the ADC under test. To relax this stringent requirement, the SEIR (stimulus error identification and removal) algorithm is developed to accurately test high-resolution ADCs using nonlinear stimuli. It has been demonstrated by industries that more than 16 bits of ADC test accuracy were achieved using 7-bit linear ramps instead of 20-bit linear ramps as required by IEEE, a relaxation of well over 1000 times on the instrumentation accuracy requirement.
The biggest contributor to test cost is the long measurement time. The recently developed uSMILE (ultrafast Segmented Model Identification for Linearity Errors) algorithm can dramatically reduce the measurement time needed for ADC linearity test. With a system identification approach using a segmented model for the integral nonlinearity, the algorithm can reduce the test time by a factor of over 100 and still achieve test accuracies superior to the standard histogram test method. This method has been extensively validated by industry and has been adopted for production test for multiple product families.
By combining the salient features of both SEIR and uSMILE, the ultrafast stimulus error removal and segmented model identification of linearity errors (USER- SMILE) algorithm is developed. The USER-SMILE algorithm uses two nonlinear signals as input to the ADC under test. One signal is shifted by a constant voltage with respect to the other nonlinear signal. By subtracting the two sets of output codes, input signal is canceled and the nonlinearity of ADC, modeled by a segmented non-parametric INL model, will be identified with the least square method.
A completely on-chip ADC BIST circuit is developed based on the USER-SMILE algorithm and demonstrated on a 28nm CMOS automotive microcontroller. The ADC test subsystem includes a nonlinear DAC as signal generator, a built-in voltage shift generator, a BIST computation engine, and dedicated memory cells. The silicon measurement results show accurate test results. The INL test results are further used to correct ADC linearity errors, thus providing a method for reliably calibrating the ADC. Measurement results demonstrated that the BIST-based calibration method achieved >10dB THD/SFDR improvements over the existing calibration method used by industry.
The convergence of healthcare, instrumentation and measurement technologies will transform healthcare as we know it, improving quality of healthcare services, reducing inefficiencies, curbing costs and improving quality of life. Smart sensors, wearable devices, Internet of Things (IoT) platforms, and big data offer new and exciting possibilities for more robust, reliable, flexible and low-cost healthcare systems and patient care strategies. These may provide value-added information and functionalities for patients, particularly for those with neuro-motor impairments. It has great importance in developed countries in the context of population ageing. In this invited talk the focus will be on: hardware and software infrastructure for neuro-motor rehabilitation; highlighting the developed solutions for motor rehabilitation based on virtual reality and serious games. As part of these interactive environments, 3D image sensors for natural user interaction with rehabilitation scenarios and remote sensing of user movement, as well as thermographic camera for remote evaluation of muscle activity will be presented. Additionally technologies for unobtrusive monitoring of patient posture, balance and walking gait monitoring during neuro-motor rehabilitation as so as the developed prototypes such as smart walkers and force platform that provide quantitative information associated with physical rehabilitation process outcome will be presented.
Challenges related to simple and secure connectivity, signal processing, data storage, data representation, data analysis including the development of specific metrics that can be used to evaluate the progress of the patients during the rehabilitation process will be discussed.
Scientific and industrial worlds have started recently to look again with interest to the basic rules to perform reliability, availability and safety analysis and design on complex electro-mechanical systems. The main failure modes on electronic devices and sensors as well as the main techniques for failure mode investigation are of interest in modern system design. Statistical characterization of the main probability density functions and degradation models of innovation is mandatory to build lasting and safe products. The main reliability design techniques such as: fault tree analysis, cut set method, minimal path approach, critical block analysis for reliability are requested by companies worldwide as well as the knowledge of the main failure modes and reliability databases and handbooks as MIL-HDBK217, OREDA, BELLCORE, etc… Maintenance policies with special attention to corrective and preventive ones are also affected by reliability design in terms of advantages and disadvantages when applied to electro-mechanical systems. The main safety standards as IEC61508, IEC 61511 and EN50129, EN50128, EN50126 are usually considered in industrial design. The aim of this talk is to enable companies to develop inner confidence on advanced modelling techniques involving reliability, availability and safe design. Under this spotlight in addition to traditional and well known statistical models, innovative modelling techniques based on statistical data representation will be introduced and tailored to some specific case studies in the fields of bio instruments, transportations and oil & gas contexts.
The talk by Prof. Sergio Saponara will focus on sensor and measurement systems for new generations of vehicles with driver-assisted/autonomous capability. This is the main trend that is revolutionizing vehicles and the mobility of people and goods and is also making our cities smart.
The economic and social impacts of this application field are huge and the borders between automotive and ICT are blurring with huge investments from conventional automotive carmakers and tier-1 component providers but also from ICT and semiconductor companies.
The key enabling technologies for this scenario are sensing and measurement systems, needed for accurate vehicle positioning and navigation, vehicle context-awareness, obstacle detection and collision avoidance, and driver-assistance.
During the lecture, Prof Saponara will outline innovation and market trends in the above domain including discussions about new context-aware sensors (Radar, Lidar, cameras) and their data processing needing AI & high-performance computing platforms, as well as on-board sensors for positioning and navigation, including recent advances in MEMS accelerometers and gyroscope. Finally, we will analyze the trend in computing platforms, where multi-core and heterogeneous architectures and machine learning/AI (artificial intelligence) techniques are used to manage in real-time multiple and heterogeneous sources of measurements and take autonomous decisions.
The heart is an amazing organic engine that converts chemical energy into work. Each heartbeat begins with an electrically-released 'spark' of calcium, which triggers force development and cell shortening, at the cost of energy and oxygen, and the release of heat. We have developed new measurement systems to measure all of these processes simultaneously while subjecting isolated samples of heart tissue to realistic contraction patterns that mimic the loads experienced by the heart with each beat. These devices are effective 'dynamometers' for the heart, that allow us to measure the performance of the heart and its tissues, much in the same way that you might test the performance of your motor vehicle on a 'dyno.'
In this talk, I will overview how we have developed our own actuators, force transducers, heat sensors, and optical measurement systems to study nature's engine: heart muscle. Heart muscle force and length are measured and controlled, beat by beat, to microNewton, and nanometer precision by a laser interferometer. At the same time, the muscle is scanned in the view of an optical microscope equipped with a fluorescent calcium imaging system. The changing muscle geometry is monitored in 4D by a custom-built optical coherence tomograph, and the spacing of muscle-proteins is imaged in real-time by transmission-microscopy. Muscle heat production is measured to nanoWatt precision using thermopile sensors. We combine all of these technologies with a hardware-based real-time acquisition and control environment and interpret results with the aid of a computational model.
Our dynamometer allows us to diagnose the 'performance' heart tissue, even as it is affected by disease, exercise, drugs, and diet. By applying this 'bioengineering approach' to the study of heart tissues, we have gathered new insight into the function of the heart - information that we hope will lead to better treatment and management of the engine upon which we all rely!
Modern control algorithms in the emerging power systems process information delivered mainly by distributed, synchronized measurement systems, and available in data streams with different reporting rates. Beyond existing measurement approaches currently embedded in SCADA framework and smart meters, there are more and more deployed high-reporting rate, synchronized measurement devices like phasor measurement units (PMUs).
There are several applications where synchronized data received with high reporting rate has to be used together with aggregated data from measurement equipment having a lower reporting rate (complying, for example, with power quality data aggregation standards) and the question is how adequate the energy transfer lossy information models are and how to correlate the measurement data streams.
The talk will address:
Unmanned Aerial Vehicles (UAVs) are becoming popular as carrier for several sensors and measurement systems, due to their low weight, small size, low cost and easy handling, which make them flexible and suitable in many measurement applications, mainly when the quantity to be measured is spread over a wide area or it lies in human-hostile environments. '
The tutorial introduces the architecture of the drone and show how the drone and its subsystems can be properly sized and characterized, according to the specification of the sensors and measurement systems that will be embedded on it.
The drone equipped with the sensors must be thought as a measurement platform and needs a metrological characterization. The tutorial presents some measurement applications, and for such applications, the measurement chain is analyzed, and the influence of the flight parameters is taken into account to assess the measurement uncertainty.
Keywords: electrical, capacitance, tomography, ieee, ims, wuqiang yang, tutorials, education, applications
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Near infrared spectroscopy (NIRS) is an optical technique that allows investigating tissue hemodynamics in-vivo and non-invasively by measuring optical absorption Near infrared spectroscopy (NIRS) is an optical technique that allows investigating tissue hemodynamics in-vivo and non-invasively by measuring optical absorption properties of oxy- and deoxy-hemoglobin using near infrared light (650-1000 nm). Since its introduction more than forty years ago, NIRS has seen a tremendous research growth due to its unique combination of performance, portability and reduced cost in comparison to other imaging techniques such as functional magnetic resonance imaging (fMRI) or positron emission tomography (PET). Importantly, NIRS has also been adopted in the clinical setting as a reliable technique for monitoring cerebral oxygenation in critical care, and many other scientific and clinical applications are rapidly developing. This tutorial introduces the basic principles of NIRS and briefly describes some of the most relevant applications in the field.
Keywords:
Point-of-Care Test (POCT) devices enable decentralized, rapid, and accurate diagnostics, supporting applications in different fields, such as medical diagnostics, environmental monitoring, and food safety.
One of the strict requirements for POCT devices lies into the ability to monitor different analytes by keeping the measurement setup unchanged. In addition to this, another important criterion in POCT development relies into the possibility to sweep different concentration ranges, thus being able to tailor the detection range to the specific application of interest.
This tutorial will present an innovative POCT device which includes an optical probe based on the so-called surface plasmon resonance (SPR) phenomenon and plastic optical fibers (POFs) to develop groundbreaking solutions to be used in several biochemical sensing scenarios.
In particular, by monitoring the change in resonance wavelength due to the analyte/receptor binding, the developed device has the capability to automatically acquire the data and send it to an external server for further processing.
The POCT device versatility has been demonstrated by several applications ranging from environmental monitoring to healthcare and industrial applications.
Keywords: Optical fiber sensors; optical biosensors; surface plasmon resonance (SPR); plastic optical fibers (POFs); point-of-care tests (POCTs)
Full tutorial can be found on the IEEE Learning Network (ILN) here: https://iln.ieee.org/Public/ContentDetails.aspx?id=3A9ADD856B3740AF9CDA…
Did you know that the IEEE Instrumentation and Measurement Society offers a variety of Video Tutorials? Many of our video tutorials allow you to earn CEUs and PHD credits. The full list of available videos can be accessed here: https://loom.ly/fikwaQM
The video is addressing the general topic of measurements in emerging power systems. Firstly, disruptive changes in electric power systems are analyzed in order to understand the impact on the requirements for control and instrumentation in smart grids; then modern measurement chains are presented together with their potential use in coping with limited knowledge on the grid infrastructure, new power quality issues generated by distributed generation or wide area measurement and control in low inertial systems. Ways of merging the information delivered by existing (SCADA, intelligent electronic devices ) and emerging (Phasor measurement units -PMUs and microPMUs) measurement systems are presented, as part of applications like the power system state estimation; The tutorial highlights the importance of assessment the measurement channel quality together with the silently adopted models for energy transfer, and issues like voltage and frequency variability; rate of change of frequency; the steady-state signal and rapid voltage changes; measurement data aggregation; filtering properties; time- aggregation algorithms in the PQ framework. The presentation ends with new applications enabled by smart metering with high reporting rate (1s) and highlights some of the challenges for measurement systems in smart grids.
Keywords: smart grids; active distribution grids; smart metering; high reporting rate measurements; unbundled smart meter
Distributed measurement systems are becoming pervasive in our daily life and collaborative networks are becoming more and more common so there is the necessity to be aware of the real meaning and implications of terms ‘distributed’ and ‘collaborative’. This tutorial is designed to let the audience to be acquainted with the different architectures of distributed measurement systems and to learn how to design a distributed measurement network, how to add collaborative functionalities and what are the implications in terms of safety and privacy of the collaborative options. The tutorial is conceived with an initial lecture part, which discusses the different architectures, which can be used to arrange a distributed network, the possibilities offered by the collaboration between used on an effortless basis and the risks in terms of security and privacy and a final part which shows an example of practical implementation.
Keywords: distributed measurements, collaborative systems, sensor networks, smart sensors, data processing, data fusion
The accurate design of experimental tests is pivotal to guarantee the quality of the output data as well as for the optimization of the resources needed to carry out an experimental campaign. Indeed, if it is true that an objective can be achieved following different paths, it is beyond doubt that it is often necessary to save time and money while guaranteeing the accuracy of the tests performed and the quality of the data gathered. Hence, starting from the fundamentals of measurements, it is important to follow basic and straightforward guidelines to make the right choices when dealing with the design of an experimental setup.
This tutorial is intended to provide a comprehensive overview of a rigorous approach to be adopted to optimize a measurement setup, going through the essential aspects of the topic and showing how each step can be optimized.
These steps include the choice and the definition of multiple aspects, as follows:
Finally, an insight on practical applications is provided.
Keywords: Measurement setup; optimization; measurement systems; signal digitization; test population; signal processing; uncertainty analysis; wearable sensors.
Information Theory (IT) originated in the realm of telecommunications, focusing on channel optimization and encoding. In recent decades, IT has been applied to understanding fundamental concepts in various other fields such as cognitive neuroscience, biology, and dimensionality reduction in machine learning. This short video will present how IT can help us understand fundamental aspects of measurement, such as resolution and signal chain optimization. I will also demonstrate how some results can lead to practical applications, such as the optimal choice of quantization resolution in A/D conversion for a noisy interface. The goal is for this framework to simplify design challenges in more complex contexts.
Keywords: Information theory; Theory of measurement; Analog-to-digital conversion; Signal chain optimization; Sensor design
Like any science and engineering field, Instrumentation and Measurement (I&M) is currently experiencing the impact of the recent rise of Artificial Intelligence and in particular Machine Learning (ML). In fact, there is an intertwined relationship between the two: I&M is used to collect data, which are then used to train ML models, which in turn are used in I&M systems. The applications are vast: medical diagnosis, surveillance, fault detection, condition monitoring, digital twins, etc. Uncertainty, which is a fundamental component of measurements including sensing, must be quantified for risk management, better decision making, and assuring the user that the system is trustworthy. In this tutorial, we show how ML is used for indirect measurement, and how to quantify the uncertainty of ML-assisted measurements to design more reliable and practical I&M systems. We cover uncertainty quantification for both ML regression and ML classification. Finally, we go over a few specific examples, both from existing literature and hands on exercises.
Keywords
Machine Learning, Uncertainty, Classification, Regression, Measurement
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The increasing need for wearable systems capable of assessing cardiorespiratory functions across diverse domains, including clinical settings and sports science, is driven by the critical importance of cardiac and respiratory parameters in detecting various health conditions and stressors. However, achieving noninvasive data collection while ensuring comfort and accuracy remains a considerable challenge. Recent advances in flexible systems and materials offer promise in addressing these challenges by introducing a new generation of wearable devices that are both more effective and comfortable.
This tutorial provides an overview of next-generation wearables tailored for monitoring cardiac and respiratory activity, particularly focusing on those based on strain sensing. It then outlines the essential steps for developing flexible wearable strain sensors capable of detecting respiratory rate and heart rate through chest wall deformation.
These steps include:
Wearables; cardiorespiratory monitoring; design optimization; data analysis techniques; hear rate monitoring; respiratory rate monitoring.
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Vibration exposure affects workers’ health: epidemiological studies showed several adverse effects, including musculoskeletal, vascular, and neurological disorders resulting from prolonged exposure to hand- arm vibration (HAV), whole-body vibration (WBV), and foot-transmitted vibration (FTV). This course presents biomechanical parameters used to describe the human response to vibration, alongside the experimental setups for their study. Measurement principles for the quantification and assessment of the risk are presented and discussed.
Keywords: Comfort; Hand-Arm Vibration; Whole-Body Vibration; Foot-Transmitted Vibration; Occupational Health
Abstract
This course reviews the techniques for measuring the electromagnetic properties of materials using transmission line techniques. The transmission line could be coaxial, waveguide or free-space. It includes types of samples, frequency ranges, and calculating materials properties from measured s-parameters. A review of the electromagnetic materials properties and their relationship to molecular structure and composition is included in the course. The use and calibration of vector network analyzers, is explained, including the definition of s-parameters. The course includes measurement demonstrations using transmission line techniques.
permittivity; permittivity measurement; dielectric measurement; complex permittivity; permeability; permeability measurement; magnetic measurement; complex permeability; material properties; intrinsic properties; vector network analyzer
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Medicine 4.0 is definitely a great revolution in patient care. New horizons are possible today. Relocation of services, which means remote monitoring, and remote diagnoses without direct contact between the doctor and the patient. Hospitals are freed from routine tests that could be performed by patients at home and reported by doctors on the internet. Telemedicine is not a WhatsApp where an elder tries to chat with a doctor. Telemedicine is a complete remote medical center connected to smart devices able to measure objective vital parameters. Medicine 4.0 requires new technologies for smart sensors, but also Artificial Intelligence is required to perform smart analysis using these smart sensors. A.I. is used both to manage intensive care rooms and to perform better and faster analyses. In this webinar, we’ll see how to use Machine learning techniques to improve ECG analyses and leg ulcer treatment.
Keywords: Telemedicine, Artificial Intelligence, Artificial Neural Networks, Electronic Health, Smart Sensors
Topical administration and transdermal delivery are advantageous in comparison with systemic administration routes because complications as first-pass metabolism, toxicity, and side effects are attenuated for the patient. Their effectiveness is evaluated by numerous studies in laboratory. However, performance outside of a laboratory, in the context of daily clinical application, is less investigated.
After an introduction on EIS for prosthesis osseointegration diagnostics in audiology and Artificial Intelligence for model definition in EIS, this tutorial presents a measurement methods (in aesthetic medicine) to evaluate the amount of a substance delivered into a tissue . A second measurement method for indirectly assessing the insulin bioavailability is discussed. The leakage of a given amount of insulin produces a corresponding variation in the measured equivalent impedance in the administration volume.
Electrochemical Impedance Spectroscopy, drug bioavailability assessment, transdermal delivery, personalized medicine,
