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  2. Eddy-current testing - Wikipedia

    en.wikipedia.org/wiki/Eddy-current_testing

    After the war, in 1948, Förster founded a company, now called the Foerster Group where he made great strides in developing practical ECT instruments and marketing them. [2] Eddy current testing is now a widely used and well understood inspection technique for flaw detection, as well as thickness and conductivity measurements.

  3. Design for inspection - Wikipedia

    en.wikipedia.org/wiki/Design_for_Inspection

    Or DFI may make it economical for 100% inspections to measure more features or to make repeated measures of the same feature at different points within the manufacturing process. This would be justified if it would reduce internal failure costs (such as costs of rework or scrap) or external failure costs (such as customer returns) within the ...

  4. Acoustic resonance technology - Wikipedia

    en.wikipedia.org/wiki/Acoustic_resonance_technology

    Acoustic resonance technology (ART) is an acoustic inspection technology developed by Det Norske Veritas over the past 20 years. ART exploits the phenomenon of half-wave resonance, whereby a suitably excited resonant target (such as a pipeline wall) exhibits longitudinal resonances at certain frequencies characteristic of the target's thickness.

  5. Optical comparator - Wikipedia

    en.wikipedia.org/wiki/Optical_comparator

    Profile projector, also known as contour comparator, is widely used to measure 2-dimensional data. An optical comparator (often called just a comparator in context) or profile projector is a device that applies the principles of optics to the inspection of manufactured parts.

  6. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    The London Science Museum contains an exhibit "James Watt's end measuring instrument with micrometer screw, 1776" which the science museum claims is probably the first screw micrometer made. This instrument is intended to measure items very accurately by placing them between the two anvils and then advancing one using a fine micrometer screw ...

  7. Ingham County restaurant inspections: Warm milk, pitas ... - AOL

    www.aol.com/ingham-county-restaurant-inspections...

    Inspection date: April 11. Inspection type: ... Use test strips to measure proper sanitizer concentration and adjust the concentration accordingly. ... two pans of in-house made whipped garlic ...

  8. Ultrasonic testing - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_testing

    The first efforts to use ultrasonic testing to detect flaws in solid material occurred in the 1930s. [1] On May 27, 1940, U.S. researcher Dr. Floyd Firestone of the University of Michigan applies for a U.S. invention patent for the first practical ultrasonic testing method.

  9. Surface plate - Wikipedia

    en.wikipedia.org/wiki/Surface_plate

    A surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out (layout), and tooling setup. [1] The surface plate is often used as the baseline for all measurements to a workpiece, therefore one primary surface is finished extremely flat with tolerances below 11.5 μm or 0.0115 mm per ...

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