Electronic distance measurement pdf. To obtain accuracy in surveying and speed up distan...
Electronic distance measurement pdf. To obtain accuracy in surveying and speed up distance measurement, the electronic distance measuring (EDM) method was introduced. It begins by explaining that EDM uses electromagnetic waves to measure distance between two points by calculating the phase changes as waves propagate from one end of the line to the other. EDM uses electromagnetic waves to measure distances in two modes: using a reflector and measuring phase, or reflectorless and measuring pulse time of flight. Phase measurement with a reflector provides more accurate distances over greater ranges than reflectorless measurement. This document discusses the principles and history of electronic distance measurement (EDM). It describes how the first EDM, the geodimeter, was invented in 1948 and used visible light, while the second, the tellurometer, used microwaves. It covers EDM measurement Electronic distance measurement in general is a term used as a method for distance measurement by electronic means. In this method instruments are used to measure distance that rely on propagation, reflection and reception of electromagnetic waves like radio, visible light or infrared waves. Such instruments display the functions of the different components more clearly. Electronic Distance Measurement - Free download as Word Doc (. xptehuxuvkivcfggwkyyorqllfvjkcilegcinthjnynfaoqo