Combined measurement system for double shield tunnel boring machine guidance based on optical and visual methods

Jiarui Lin, Kai Gao, Yang Gao, Zheng Wang

Research output: Contribution to journalArticle

1 Citation (Scopus)


In order to detect the position of the cutting shield at the head of a double shield tunnel boring machine (TBM) during the excavation, this paper develops a combined measurement system which is mainly composed of several optical feature points, a monocular vision sensor, a laser target sensor, and a total station. The different elements of the combined system are mounted on the TBM in suitable sequence, and the position of the cutting shield in the reference total station frame is determined by coordinate transformations. Subsequently, the structure of the feature points and matching technique for them are expounded, the position measurement method based on monocular vision is presented, and the calibration methods for the unknown relationships among different parts of the system are proposed. Finally, a set of experimental platforms to simulate the double shield TBM is established, and accuracy verification experiments are conducted. Experimental results show that the mean deviation of the system is 6.8 mm, which satisfies the requirements of double shield TBM guidance.

Original languageEnglish
Pages (from-to)1810-1816
Number of pages7
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number10
Publication statusPublished - 1 Oct 2017


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition

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