An Ultra-Precision Air-Pin Sensor and Its Dynamic Characteristics

Zhang, Hui; Deng, Shuai; Wang, Hui Qiang; Chen, S.

doi:10.4028/www.scientific.net/kem.295-296.557

Cited by 2 publications

(2 citation statements)

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“…These developments in sensor technology introduced the need to study the dynamic characteristics of ultra-precision air gauge systems. Rucki [23,24,25] and Zhang [26] both investigated metb.ods to reduce air gauge uncertainty. The most influential parameter of the pneumatic gauging system was found to be the ratio of nozzle outer diameter (de) to inner diameter (dp).…”

Section: Pneumatic Methodsmentioning

confidence: 99%

Pneumatic non-contact roughness assessment of moving surfaces

2009

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All machined surfaces inherently have roughness. The level of control of this surface is dependeat on the specifications outlined for its intended use. In strictly controlled situatiom, the monitoring and characterization of these surfaces becomes increasingly important to ensure that each component conforms to specifications. For this reason, the need f,)r in-situ monitoring systems has increased in order to optimize manufacturing time and minimize generated scrap for companies to remain competitive in industry. Current in-situ roughness monitoring systems, such as optical methods, are limited by the harsl: environments in which these systems are required to operate and the requirement for highly reflective materials. Accordingly, the need to develop a more robust system is required. The objective of this work was to develop and test a noncontact surface roughness characterization system which can be implemented into a machining center in order to provide in-situ measurements where currently available methods are rendered inappropriate.

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Section: Pneumatic Methodsmentioning

confidence: 99%

Pneumatic non-contact roughness assessment of moving surfaces

2009

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“…W literaturze można spotkać konstrukcje czujników pneumatycznych o małej komorze, dających możliwość zmniejszenia stałej czasowej do kilku ms [39]. Rys.…”

Section: Czynniki Warunkujące Błąd Dynamicznyunclassified

Variations of the time constant within the measuring range of an air gauge

Rucki¹

2015

Mechanik

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ZMIENNOŚĆ STAŁEJ CZASOWEJ W CZASIE POMIARU CZUJNIKIEM PNEUMATYCZNYMPomiar bezstykowy czujnikami pneumatycznymi wciąż znajduje zastosowanie w przemyśle, głównie w ukła-dach kontroli czynnej. W tych warunkach bardzo istotne są ich właściwości dynamiczne, zależne od geometrii elementów przepływowych oraz od aktualnego ciśnienia w komorze pomiarowej. Badania wykazały, że przy mniejszych ciśnieniach odpowiadających szerszym szczelinom pomiarowym, stała czasowa wzrasta, w niektó-rych przypadkach nawet o 100%. Nieuwzględnienie tego faktu może doprowadzić do zwiększenia błędów pomiaru właśnie w końcowej fazie obróbki. VARIATIONS OF THE TIME CONSTANT WITHIN THE MEASURING RANGE OF AN AIR GAUGENon-contact measurement with the air gauges still takes place in industry, mainly in the in-process inspection. In such work conditions, their dynamic characteristics shaped by geometry of the air gauge and dependent on the actual measuring pressure become of great importance. The investigations proved that when the pressure in the chamber is lower, which corresponds with larger measured slots, the time constant increases, sometimes even up to 100%. If this phenomenon is neglected, the final stage of the machining could bear much larger error than expected.

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An Ultra-Precision Air-Pin Sensor and Its Dynamic Characteristics

Cited by 2 publications

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Pneumatic non-contact roughness assessment of moving surfaces

Pneumatic non-contact roughness assessment of moving surfaces

Variations of the time constant within the measuring range of an air gauge

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