Profile Meter

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Profile Meter

 

an instrument for measuring the irregularities of a surface; the readout of the measurement results is a scale giving one of the parameters used to evaluate these irregularities—surface roughness. The first profile meters appeared at almost the same time as profilographs.

In profile meters, a signal is received from a sensor with a diamond stylus that moves perpendicularly to the surface being measured. After electronic amplification, the signal is integrated to give an averaged parameter, which quantitatively characterizes the surface irregularities over a given length. The most common profile meters have a fixed integration run equal to the length of the sensing trace and read out on a scale after the trace is completed. Some profile meters have a variable integration run that is less than the length of the sensing trace and read out as the stylus moves over the surface. The error in readings varies from ± 10 to ± 25 percent.

The conversion of oscillations from the diamond stylus into voltages may be achieved by several methods. In the USSR, profile meters with mechanotron converters are produced by the Kalibr Factory; they read out an arithmetic average deviation of the surface profile (Ra) within limits of 0.025 to 5 microns and with an error of ± 16 percent for an integration run of 3.2 mm. This instrument may be used to measure inner surfaces with diameters of 6 mm or greater.

Further improvements in profile meters will involve expansion of the number of averaged vertical and horizontal readings and the fitting of devices that analyze harmonic components to form a curve characteristic of the surface irregularities.

REFERENCE

See reference under .

N. N. MARKOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
We have done testing with a profile meter (profilometer) to see what the peak counts per inch were while blasting.
Perhaps highest on the profile meter is a multi-faceted project from IMX producers Jan Miller and Chris Zimmer that will spring four or five low-budget features out of a single concept.
SeCaP can be packaged as a full bore, non intrusive 0-100% water cut monitor, a level profile meter for a separator or oil storage vessel, a water level indicator or a single-point water cut meter.

Full browser ?