| Short Title: | Measurement Systems |
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| Full Title: | Measurement Systems |
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| Language of Instruction: | English |
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| Field of Study: | Mechanics and metal work |
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| Reviewed By: | DIARMUID RUSH |
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| Module Author: | HUGH MCGUINNE |
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| Module Description: | The aim of the subject is to provide the student with the ability to use measurement methods in lab work throughout the course and in professional life. |
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| Learning Outcomes |
| On successful completion of this module the learner will be able to: |
| LO1 |
Identify sources and types of measurement errors. |
| LO2 |
Differentiate between accuracy, precision and resolution in measurement systems. |
| LO3 |
Describe the uses of temperature, proximity and strain transducers and bridge type signal conditioning systems. |
| LO4 |
Explain the principles of 'GO' and 'NO GO' gauges, limits and fits and gauge blocks. |
| LO5 |
Calibrate a basic measuring instrument ( Micrometer to BS 870). |
| LO6 |
Explain the principles of angular measurement. |
| LO7 |
Describe the principles of surface metrology and calculate surface roughness by various methods. |
| LO8 |
Use and describe operation of a Laser micrometer, Optical Profile Projector and CMM. |
| Pre-requisite learning |
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Co-requisite Modules
| | No Co-requisite modules listed |
Module Content & Assessment
| Content (The percentage workload breakdown is inidcative and subject to change) |
% |
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Measurement Characteristics: Measurement error; systematic and random, sources and possible fixes. Static characteristics; accuracy, precision, resolution and sensitivity. Dynamic characteristics; zero order, first order, second oder response. Damping, response time, settling time.
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20.00% |
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Measurement Systems: Functional elements of a measurement system; sensors, signal conditioning, data display/ recording. Thermistors, strain gauges, wheatstone bridge circuit, variable area capacitors, piezoelectric accelerometer, thermocouples.
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10.00% |
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Measurement Instrumentation: Vernier calipers, Micrometer screw gauge, calibration of the micrometer to BS 870, metric gauge blocks.
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15.00% |
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Angular Measurement: Background theory of precision balls and rollers. Sine bar.
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15.00% |
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Limit Gauges: Inspection vs measurement. Taylor's theory of gauging, manufacturing tolerances, wear allowance. Pin gauges, gap gauges.
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10.00% |
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Background Theory of Limits and Fits: Hole based systems, Shaft based systems, BS4500. Clearance fit, transition fit and interference fit.
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10.00% |
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Precision Measurement Instrumentation: Operation principles of Optical Profile Projector (OPP), Surface measuring equipment, Laser Micrometer and Coordinate Measuring machine (CMM).
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20.00% |
| Assessment Breakdown | % |
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| Course Work | 30.00% |
| End of Module Formal Examination | 70.00% |
| Course Work |
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| Assessment Type |
Assessment Description |
Outcome addressed |
% of total |
Assessment Date |
| Laboratory |
A written individual lab report is required on one of the following three: Velocity measurement systems, Temperature measurement systems, Strain measurement systems. |
2,3 |
10.00 |
Week 5 |
| Laboratory |
A written individual lab report is required on one of the following three: Optical profile projector, Surface roughness measurement using the Hommell, Angle measurement. |
6,7,8 |
10.00 |
Week 8 |
| Laboratory |
A written individual lab report is required on one of the following three: Gauge block use, Calibration of the Micrometer to BS 870, Using Micrometer and CMM. |
4,5,8 |
10.00 |
Sem 1 End |
| End of Module Formal Examination |
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| Assessment Type |
Assessment Description |
Outcome addressed |
% of total |
Assessment Date |
| Formal Exam |
End-of-Semester Final Examination |
1,2,3,4,5,6,7,8 |
70.00 |
End-of-Semester |
IT Tallaght reserves the right to alter the nature and timings of assessment Module Workload
| Workload: Full Time |
| Workload Type |
Workload Description |
Hours |
Frequency |
Average Weekly Learner Workload |
| Lecture |
Class work |
2.00 |
Every Week |
2.00 |
| Lab |
Practical work |
2.00 |
Every Week |
2.00 |
| Independent Learning |
Outside of class |
4.00 |
Every Week |
4.00 |
| Total Weekly Learner Workload |
8.00 |
| Total Weekly Contact Hours |
4.00 |
| Workload: Part Time |
| Workload Type |
Workload Description |
Hours |
Frequency |
Average Weekly Learner Workload |
| Lecture |
Class work |
2.00 |
Every Week |
2.00 |
| Lab |
Practical work |
2.00 |
Every Week |
2.00 |
| Independent Learning |
Outside of class |
4.00 |
Every Week |
4.00 |
| Total Weekly Learner Workload |
8.00 |
| Total Weekly Contact Hours |
4.00 |
Module Resources| Recommended Book Resources |
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- Francis T. Farago, Mark A. Curtis 2013, Handbook of Dimensional Measurement, 5th Ed. Ed., Industrial Press Inc. [ISBN: 9780831134655]
- John Gayler and Charles Shotbolt 1990, Metrology for Engineers, 5th Ed. Ed., Cassell
- Peter Elgar 1998, Sensors for Measurement and Control, Longman Essex, England [ISBN: 9780582357006]
| | This module does not have any article/paper resources |
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| Other Resources |
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- Online Moodle Resource: Measurement Systems Course Notes
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Module Delivered in
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