Assistance for the determination of Measurement Uncertainty Analysis. Development of a prototypical implementation within the existing framework

Master's Thesis , 2015 , 55 Pages , Grade: 2

Computer Science - Applied

The project shall contribute to the further development of a prototypical implementation for an assistance solution supporting measurement uncertainty analysis within the existing framework. The main tasks in this project will be:

Familiarisation with the topic of measurement uncertainty analysis and the handling of software GUM Workbench®, definition of an design outline for the user support during measurement uncertainty analysis, including an analysis of required supporting function and the subsequent definition of a possible system structure, selection of one aspect in the process and development of a draft for an adequate support solution, containing elements to enable partial automation or increase of efficiency for the process step as well as explanatory information for the users, prototypical implementation and testing of the defined elements within the outlined framework.

In the "Guide to the Expression of Uncertainty in Measurement" (GUM), jointly issued by ISO and BIPM, a standard procedure for the determination of measurement uncertainty is defined. Yet, although this document is supported by many international organisations and the consideration of measurement uncertainty is of high importance in many fields of application, ranging from industrial quality control to scientific research, still often the determination of measurement uncertainty is omitted.
This is mainly due to difficulties of the metrologists to apply the general rules of the GUM to the task at hand. To ease this task and support the determination of measurement uncertainty, the software GUM Workbench® performs all required mathematical evaluations based on a model of the measurement. Additionally, a concept for an assistance system as well as a graphic modelling editor has been developed to facilitate the definition of a suitable model.
But, the existing concepts are not yet fit for practical testing under industrial conditions.

Inhaltsverzeichnis (Table of Contents)

• CHAPTER 1
  • 1. INTRODUCTION TO UNCERTAINTY MEASUREMENT
  • 1.1 The Definition of Uncertainty Measurement
  • 1.1.1 The Explanation of the Definition
  • 1.1.2 Specification of Measurand
  • 1.1.3 Error, Precision and Uncertainty
  • 1.2 Sources of Uncertainty
  • 1.3 Estimation of Uncertainties
  • 1.3.1 Model the Process
  • 1.3.2 'Type A' Evaluation of Standard Uncertainty
  • 1.3.3 'Type B' Evaluation of Standard Uncertainty
• CHAPTER 2
  • 2. GUM WORKBENCHⓇ
  • 2.1 The Software
  • 2.2 Uncertainty Analysis Steps
• CHAPTER 3
  • 3. EVALUATION OF THE UNCERTAINTY USING THE GUM WORKBENCH SOFTWARE
  • 3.1 Project 1
    • Calibration and Measurement Uncertainty of a Power Sensor at a Frequency of 19 GHz Using the Gum Workbench Software
    • 3.1.1 Introduction
    • 3.1.2 The Model Equation and the Input Quantities
    • 3.1.3 Results
    • 3.1.4 Uncertainty budget (Kx)
    • 3.1.5 Discussion
  • 3.2 Project 2
    • Calibration And Measurement Uncertainty Of Radio Frequency Field Strength Meters Using Broad-Band E Or H-Field Sensor in the Frequency Range up to 18GHz
    • 3.2.1 Introduction
    • 3.2.2 The Evaluation of Uncertainty and Results using GUM
    • 3.2.3 Discussion
• CHAPTER 4
  • 4. DEVELOPMENT OF A SUPPORT USER GUIDE DESIGN FOR MEASUREMENT UNCERTAINTY ANALYSIS
  • 4.1 Introduction
  • 4.1.1 The Need of an Assistance System for the Evaluation of the Uncertainty
  • 4.2 General User Guide Procedures
  • 4.2.1 Understanding the Main Experiment
  • 4.2.2 The Measurement Setup
  • 4.2.3 Evaluation of the Uncertainty
  • 4.2.4 Stating Results
  • 4.3 Design Outline for the User Support
  • 4.3.1 Design Outline for First Step
  • 4.3.2 Design Outline for Second Step
  • 4.3.3 Design Outline for Third Step
  • 4.3.4 Design Outline for Fourth Step
  • 4.4 Design Outline for Finding the Model Equation
• CHAPTER 5
  • 5. IMPLEMENTATION OF THE USER GUIDE DESIGN AND OTHER SUGGESTED IDEAS
  • 5.1 Introduction
  • 5.1.1 Ways of Implementation and Suggested Ideas
  • 5.2 User Guide Design

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This master's thesis aims to contribute to the development of a prototype assistance system for measurement uncertainty analysis within the existing framework of the GUM WorkbenchⓇ software. The project focuses on improving the user experience by simplifying the complex process of determining measurement uncertainty, making it more accessible for metrologists in various fields.

• Measurement uncertainty analysis and the GUM WorkbenchⓇ software
• Designing user-friendly interfaces and tools for uncertainty analysis
• Automating or streamlining specific steps in the uncertainty analysis process
• Providing explanatory information and guidance to users
• Developing a prototype implementation for practical testing in industrial settings

Zusammenfassung der Kapitel (Chapter Summaries)

• Chapter 1: Introduction to Uncertainty Measurement - This chapter establishes the definition of measurement uncertainty and explores its significance in various fields. It delves into sources of uncertainty, methods of estimation, and explains the concepts of 'Type A' and 'Type B' evaluations.
• Chapter 2: GUM WorkbenchⓇ - This chapter focuses on the GUM WorkbenchⓇ software, a tool designed for performing mathematical evaluations based on a model of the measurement. It explains the software's features and the steps involved in conducting uncertainty analysis.
• Chapter 3: Evaluation of the Uncertainty Using the GUM Workbench Software - This chapter presents practical examples of using the GUM WorkbenchⓇ software for determining measurement uncertainty in real-world scenarios. It discusses the methodologies used in two projects: a power sensor calibration and a radio frequency field strength meter calibration.
• Chapter 4: Development of a Support User Guide Design for Measurement Uncertainty Analysis - This chapter addresses the need for a user-friendly assistance system for evaluating uncertainty. It outlines the essential steps involved in uncertainty analysis and presents a design framework for supporting users throughout the process. The design includes steps for defining the measurement setup, understanding the experiment, finding the model equation, and evaluating and stating results.
• Chapter 5: Implementation of the User Guide Design and Other Suggested Ideas - This chapter details the implementation of the user guide design proposed in the previous chapter. It explores various implementation strategies and suggests additional ideas for further enhancing the user experience and simplifying the uncertainty analysis process.

Schlüsselwörter (Keywords)

The primary focus of this work lies in measurement uncertainty analysis, particularly within the framework of the GUM WorkbenchⓇ software. Key themes explored include the development of user-friendly assistance systems for uncertainty analysis, automation of specific process steps, and the provision of informative guidance to users. The project aims to bridge the gap between the complexity of uncertainty analysis and the need for accessible tools for practical applications in various fields like industrial quality control and scientific research.

• College: University of Applied Sciences Coburg
• Grade: 2
• Author: Motasem Kharisat (Author)
• Publication Year: 2015
• Pages: 55
• Catalog Number: V972503
• ISBN (eBook): 9783346320353
• ISBN (Book): 9783346320360
• Language: English
• Tags: Measurements, Uncertainty, Tests, Sensors, engineering, GUMWORKBENCH, Analysis, assistance, Master, thesis