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Description
This paper presents the validation procedure and performance assessment of a new prototype named Ecartometry Measurement by Automatic Photogrammetric Survey (EMAPS).
Developed for the High-Luminosity LHC (HL-LHC) project, the system measures the horizontal offset between a stretched wire and a target,
contributing to the development of high-accuracy, automated and remote alignment measurements.
Photogrammetric wire offset and target measurements enable the precise transfer of planimetric geometry over long distances while embracing the perspective of automation.
In this context, the development of EMAPS has enabled reliable measurements that could be integrated into automated survey workflows.
Several measurement campaigns were conducted to evaluate the system’s performance and compare it with established instruments and methods,
including manual wire-offset measurements, the Full Remote Alignment System (FRAS), and the Leica ATS800.
The results demonstrate a measurement precision of approximately 12 μm (1 𝜎), an accuracy of about 20 μm (1 𝜎) and the measurement process
is up to three times faster than conventional manual wire-offset techniques, prior to automated displacement.
These comparisons confirm the capability of EMAPS to provide accurate and repeatable measurements while significantly improving operational efficiency,
making it a promising solution for future automated measurement applications.
