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1, Comm. V, 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 5. Hakodate 1998 
MEASUREMENT BACK UP SYSTEM FOR SUBSTATION EQUIPMENT BASE PLATES 
Atsuyuki MATSUMOTO, Hiroshi YOKOYAMA 
Researcher, 2" Dept. Matsudo Reserch Laboratory 
Hitachi Plant Engineering & Construction Co., Ltd. 
Kamihongo 537, Matsudo-shi, Chiba-pref., 271- 
JAPAN 
Commission V, Working Group 2 
KEY WORDS: CAD, Total Station, Substation Plant, Automatic Recognition 
ABSTRUCT 
To enable the construction of substation plant to be carried out in a streamlined way, a System has been built up which 
backs up the measurement of the position of base plates for installing the equipment. 
This system is capable of; (1) reading the design value of base position from CAD data automatically, (2) making sure of 
discrepancy between design value and measured value immediately during measurement and (3) outputting the 
measurement results automatically in a spread sheet form. 
This system reads the design value automatically by fetching CAD data of DXF type, recognizing a plate automatically by 
utilizing such shape feature as a square of the base plate, recognizing a dimensional auxiliary line connected with the 
base plate and further, recognizing a dimensional line connected with the dimensional auxiliary line and a designed 
dimension drawn on the dimensional line. 
A prospect has been obtained that by making use of this system, reduction in the time of measurement work of base 
plate position and improvement in reliability can be attained. Form now on, it is scheduled to examine an automatic 
measurement system by the image sensing. 
1. Introduction have been used for the measurement work of this base 
plate position and at present, a three-dimensional 
Such equipment as a switch-gear or transformer of the measuring instrument (total station) is used for 
substation plant is installed on H-steel-made base plate streamlining the execution of work. 
embedded into concrete. A work which measures the However, the number of base plates is about as much as 
base plates placed position and makes sure that 200 pieces per work site and an error which takes a 
discrepancy with the design value is less than an wrong measures plate is liable to occur. Also, the work 
allowable value becomes important for securing the which reads the design value of base position from the 
installation accuracy of equipment. plan and the work which puts the measurement results in 
Conventionally, Y-level, steel measure, piano wire, etc. order have been done by hand and it has taken much 
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