INTROODUCTION TO METROLOGY.pptx
-
Upload
varma-jitendra -
Category
Documents
-
view
1 -
download
0
Transcript of INTROODUCTION TO METROLOGY.pptx
![Page 1: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/1.jpg)
INTROODUCTION TO METROLOGY
![Page 2: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/2.jpg)
Prehistoric people didn’t have time to measure
![Page 3: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/3.jpg)
METROLOGY: IT IS A SCIENCE OF MEASUREMENT.
ENGINEERING METROLOGY is the measurement of dimensions: length, thickness, diameter, taper, angle, flatness, profiles, and others.
MeasurementIt is the act, or result of a quantitive comparison between a predetermined standard and an unknown magnitude
![Page 4: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/4.jpg)
IT INCLUDE ALL THEORATICAL AND PRACTICAL ASPECTS OF MEASUREMENT.
• Errors of measurement• Measurement method.• Various measuring instrument and devices.• Units of measurement and their standard• Industrial inspection and its different technique.• Measuring instruments care and their accuracy.
![Page 5: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/5.jpg)
TERMS USED IN METROLOGY
SPECIFICATION:
Every product and part have some certain characteristics .It gives certain thoughts of that particular product. Its called specification
STANDARD :
Standard is define as , it is a physical quantity which is established by higher authority or organization .This standard is reliable and acceptable to measure physical quantity. Ex. METER
![Page 6: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/6.jpg)
LENGTH STANDARD
THERE ARE TWO STNDARD SYSTEM TO MEASURE LENGTH
1.BRITISH SYSTEM: INCH,FOOT,YARD
2.METRIC SYSTEM: MM,CM,METER
![Page 7: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/7.jpg)
Need of metrology (inspection).
![Page 8: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/8.jpg)
Importance of metrology:
• To achieve quality control in production• To achieve up to date production.• To reduce rejection with the help of quality control.• To develop inspection procedure .• To calibrate measuring instrument time to time
![Page 9: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/9.jpg)
Objectives of metrology
• To minimise the cost of inspection by effective and efficient use of available facilities
• To minimize the cost of rejection and re-work through through application of SQC technique.
• To maintain the accuracies of measurement.• To do complete evalution of newly developed products.• To standardise the measuring methods.• To make a design for all gauges and special inspection fixtures.
![Page 10: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/10.jpg)
Accuracy vs precision
Accuracy: it refers to the closeness of a measured value to a standard or known value.
Precision: it refers to the closeness of two or more measurement to each other
![Page 11: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/11.jpg)
Accuracy and precision
![Page 12: INTROODUCTION TO METROLOGY.pptx](https://reader035.fdocuments.us/reader035/viewer/2022070413/55cf920d550346f57b930d04/html5/thumbnails/12.jpg)