CONFERENCE PROCEEDINGS
6th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2018 , 2018.y., pp. 745-753
HISTORICAL REVIEW OF PRECISE LENGTH MEASUREMENTS| |
 |
| DOI: 10.14415/konferencijaGFS2018.073 |
| UDC: 528.021:528.51 |
| CC-BY-SA 4.0 license |
| Author : Delčev, Siniša; Ogrizović, Vukan; Gučević, Jelena; Miljković, Stefan |
| |
| | Summary: |
| | Precise measurement of long distances for scale determination, especially in
1st order trigonometric networks, was a problem for years. Thanks to Snellius and his
work, a shorter distance on a flat field could be measured, and then its scale could be
transferred by angle measurements to a distance between two 1st order trigonometric
points. However, even measuring those short distances could not be measured with high
accuracy. Lengths were measured by wooden or metal levers, until the invention of
invar, which allowed precise distance measurements. Furthermore, electro-optical and,
later, laser distance meters, involved direct precise measurements of long distances. |
| |
| | Keywords: |
| | invar wires, Jäderin basis apparatus, distance meter, pulse, phase, frequency |
| |
| |
| |
