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Metrology is the science of precision measurement. The engineer can say it is the science of measurement of lengths and angles and all related quantities l... [Show More] ike width, depth, diameter and straightness with high accuracy. [Show Less]
Standards are published documents created to ensure the reliability of the materials, products, methods, and/or services. They establish requirements, spe... [Show More] cifications, guidelines, characteristics, and/or procedures designed [Show Less]
Interchangeability of the parts depends upon the many factors such as Limits, Fits, and Tolerance given between the mating parts. Limits, fits, and toleran... [Show More] ce plays the very most important role while designing and manufacturing any parts of a machine or elements. [Show Less]
A go/no-go gauge refers to an inspection tool used to check a workpiece against its allowed tolerances via a go/no-go test. Its name is derived from two te... [Show More] sts: the check involves the workpiece having to pass one test (go) and fail the other (no-go). [Show Less]
Building mechanical systems exist to provide an environment that protects the building structure, creates safe and healthy surroundings for the occupants, ... [Show More] and allows equipment that is housed within the facility to operate properly. [Show Less]
Static performance characteristics include the linearity performance of the instrument, static sensitivity of the instrument, repeatability of the same res... [Show More] ults, hysteresis resolution, and the readability of the results. [Show Less]
Interference is the principle behind the working of optical flats. An optical flat is placed on a surface, in order to measure its flatness, before a monoc... [Show More] hromatic light is made to pass through the area of contact. In cases where the test surface is perfectly flat, there will be no gap between the two surfaces. [Show Less]
Interferometers are devices that extract information from interference. They are widely used in science and industry for the measurement of microscopic dis... [Show More] placements, refractive index changes and surface irregularities. [Show Less]
Surface measurement, also known as surface metrology – refers to the measurement of topography or surface roughness of precision surfaces. Surface roughn... [Show More] ess and the details of the surface profile determine the performance and appearance of many products. [Show Less]
Gears is a mechanical drive which transmits power through toothed wheel. In this gear drive, the driving wheel is in direct contact with driven wheel. The... [Show More] accuracy of gearing is the very important factor when gears are manufactured. The transmission efficiency is almost 99 in gears. So it is very important to test and measure the gears precisely. [Show Less]
To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is call... [Show More] ed the major diameter and will usually be the proper size of the bolt. [Show Less]
Temperature measurement in today’s industrial environment encompasses a wide variety of needs and applications. To meet this wide array of needs the proc... [Show More] ess controls industry has developed a large number of sensors and devices to handle this demand. [Show Less]
Displacement measurement, being simply a change in length, is usually carried out by counting the number of fringes as the object being measured (or refere... [Show More] nce surface) is displaced. [Show Less]
Pressure is typically measured in units of force per unit of surface area ( P = F / A). In physical science the symbol for pressure is p and the SI unit fo... [Show More] r measuring pressure is pascal (symbol: Pa). One pascal is the force of one Newton per square meter acting perpendicular on a surface. [Show Less]
A block diagram is used to represent a control system in diagram form. In other words, the practical representation of a control system is its block diagra... [Show More] m. Each element of the control system is represented with a block and the block is the symbolic representation of the transfer function of that element. [Show Less]
Block diagrams consist of a single block or a combination of blocks. These are used to represent the control systems in pictorial form.
Flow Measurement is the process of measuring fluid in your plant or industry. You can measure flow through a variety of different devices such as Coriolis,... [Show More] differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters. [Show Less]
Strain is a non-dimensional value that represents the change of length of a material relative to its initial length. Since the changes of length are usuall... [Show More] y very small, the standard fractional prefixes of the SI system are used. For strain, micrometer per meter (μm/m = 10-6 m/m = ppm) is generally used. [Show Less]
Routh Hurwitz criterion states that any system can be stable if and only if all the roots of the first column have the same sign and if it does not has the... [Show More] same sign or there is a sign change then the number of sign changes in the first column is equal to the number of roots of the characteristic equation in the right ... [Show Less]
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