tachymeter

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tachymeter

 [tah-kim´ĕ-ter]
an instrument for measuring rapidity of motion.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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Other devices included Leica TC1800 electronic tachymeter, a micrometric table, a surveying tripod, three-axis photographic head--Manfrotto 405 Geared Head, geodetic tripod for engineering purposes with a jib, two tribrachs, two targets and the observation pillar.
The experimental works involved taking pictures of plate targets for the set values of the zenith angle and horizontal direction of the tachymeter telescope and shifts of the micrometric table in the horizontal plane.
Measuring the angles of the two aiming lines in horizontal plan ([[alpha].sub.H]= Hz) and in vertical plan ([[alpha].sub.V]= V), using the two electronic tachymeters, as it can be seen in fig.2, and then using the triangulation methods, are determined the coordinates of the aimed point.