Abstract
In this paper, a low-cost and real-time pose measurement method for straight pipe jacking machine in tunneling guidance is proposed, which utilizes an instruction laser and a dual-screen laser target. The precise localization of light-spot on target is realized by high-performance processing of the image and grid calibration of the target. The spatial matrix transformation method is used to calculate the parameters for the specified position of the pipe jacking machine. Subsequently, the horizontal/vertical deviation between the actual moving route of the straight pipe jacking machine and the design tunnel axis (DTA) can be calculated. The results of the experiment show that the precision and absolute error of the azimuth angle measurement are better than 0.03° (1∑) and 0.05°, respectively. The measurement error of horizontal/vertical deviation is less than 3 mm. Hence, this method is feasible and highly accurate, which can effectively solve the guidance problem of pipe jacking construction.
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