For further details contact: N.RAJASEKARAN B.E M.S 9841091117,9840103301. IMPULSE TECHNOLOGIES, Old no: 251, New no: 304, 2nd floor, Arcot road , Vadapalani , Chennai-26. Website - www.impulse.net.in Email ID - ieeeprojects@yahoo.com imbpulse@gmail.com

1. Impulse Technologies
Beacons U to World of technology
044-42133143, 98401 03301,9841091117 ieeeprojects@yahoo.com www.impulse.net.in
A Real-Time Conductor Sag Measurement System Using a
Differential GPS
Abstract
A real-time and “direct” method of measuring the absolute value of sag on a
transmission-line conductor using a differential global positioning system (DGPS)
is presented. The method includes a real-time data-processing module integrated
into the DGPS system. The GPS signals corresponding to physical movement of
the midspan of a transmission-line conductor were obtained so that conductor-to-
ground clearance could be recorded in real time. Several field tests were designed
and implemented to test the DGPS method under varying conditions of the
transmission-line current. A comparison of results obtained from the DGPS
method with those from a laser-range finder indicates an accuracy of 1 in.
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