Some experimental data for a distance measurement are as folows: Data Point Value Measured in meters 1 1.52 1.49 1.50 | 1.56 1.54 3 4 1.38 1.61 1.55 1.54 10 1.62 11 1.81 12 13 1.47 1.52 14 1.44
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
Calculate the absolute uncertainty, fractional uncertainty, and percentile uncertainty
Total Data point =14
Mean value =
Mean value =1.53
Uncertainty= mean value - data point value
fractional uncertainty =
percentile uncertainty=fractional uncertainty percent
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