| 单词 |
tacheometer |
| 释义 |
tacheometer|tækiːˈɒmɪtə(r)|
[a. F. tachéomètre, f. Gr. ταχε-, obl. stem of ταχύ-ς quick, swift, τάχος swiftness + -meter: see also tachymeter.]
A name given to instruments (of which there are various kinds) for the rapid location of points on a survey; = tachymeter. Hence tacheoˈmetric a., pertaining to a tacheometer or tacheometry; tacheˈometry, surveying by means of a tacheometer.
1876Catal. Sci. App. S. Kens. 425 The Tacheometer of Gentilli... The means by which it measures the distance is an apparatus which obliges the lunette to traverse an unvarying angle. 1888B. H. Brough Mine Surveying 204 The aim of tacheometry is to survey and level simultaneously a tract of ground with the greatest possible accuracy in the least possible time. 1900Nature 11 Oct. 571/2 Suggestions on possible methods of utilising existing transit theodolites for tacheometric work. 1905C. F. Close Test Bk. Surveying v. 51 Tacheometry (called also in American books Tachymetry or Tachyometry) a system of ‘rapid measuring’..includes all the eight variations just mentioned. The system was first largely employed in Italy in 1820, but had been used in the eighteenth century in England. Ibid. 55 The term ‘tacheometer’ is best confined to instruments which have this optical arrangement [a converging lens between the object-glass and the diaphragm of a theodolite]. |
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