计量学复习内容（Review of Metrology）.doc

计量学复习内容（Review of Metrology） The first chapter is an introduction 1 metrology, measurement, testing Measurement (measurement): a set of operations designed to determine the value of a quantity. Measurement: to achieve unity of units, accurate and reliable activities. Metrology is a discipline, which is the theoretical and technical basis of measurement. It includes the knowledge field of measurement. The measurement is a specific operation or experimental process, and it is the practical application of metrology. Testing: measurement with experimental properties. 2, measurement technology research content and classification In our country, metrology is divided into 10 categories, including geometry, temperature, mechanics, electromagnetics, electronics, time, frequency, ionizing radiation, optics, acoustics and standard materials. The second chapter, measurement and unit system 1, quantity, quantity, value, dimension 2, the concept of units 3, the international system of units by SI units (including SI basic unit, SI auxiliary units and SI derived units), SI prefix and SI units decimal multiples and submultiples of unit three parts. 4, the concept of unit system 5, basic units are defined, realized, maintained or reproduced by measuring standards. Benchmarks are measurement standards with the highest measurement characteristics in a particular field. (seven international basic units) 6, Chinas legal unit of measurement is based on the international system of units, and retains a small number of other units of measurement. It includes the basic unit, the SI auxiliary units, derived units and prefix, also selected some non SI units The third chapter is the measurement error and measurement uncertainty 1, the absolute error, relative error and the concept of reference error 2, citing error example 3, the basic concepts of system error, random error and gross error are produced Causes and methods of compensation 4. The concept and evaluation method of measurement uncert