Automatic guide measuring target and measuring system for shield machine

Abstract

Provided is an automatic guide measuring target and system for a shield machine. The measuring target is a target prism which is arranged in the shield machine and can move along a fixed rectilinear coordinate. The spatial relationship between the rectilinear coordinate and the axis of the shield machine is known, and the target prism can remain at any position of the straight line. The system comprises the target and a total station which is arranged at the back of the shield machine and havs an automatic recognition function. The target prism moves along a rectilinear track and remains at different positions successively, the prism at the different positions is observed through the total station, spatial position information of a plurality of different remaining points is obtained, a rolling angle and a pitch angle are measured through a double-axis inclinometer INCL, and measurement results are transmitted back to the system. The automatic guide measuring target and system for the shield machine can be suitable for tunnel shield construction of various conditions, influence of angle-measuring errors of the total station on the measurement result precision can be greatly reduced or even eliminated, and the automatic guide measuring target and system for the shield machine can have self-check and correction capabilities.

Description

[0001] technical field [0002] The invention relates to a real-time guidance measurement system for shield tunneling and a measurement target used in the system. Background technique [0003] Shield tunneling technology is an engineering technology for underground tunnel excavation, and determining the state of the shield machine during tunneling construction is the key to engineering technology. The shield guiding measurement system uses advanced measurement, sensing and computer technology to detect the position, status and trend information of the shield machine in real time, and compare it with the designed tunnel axis at any time, and provide the shield machine operator with an intuitive way information for timely correction. At present, the targets used in the known shield guidance measurement system include: controllable switchable double prism, triangular prism system (hereinafter referred to as the multi-prism system), and there is also a fixed single prism plus i...

AI Technical Summary

Problems solved by technology

If this method is adopted, the total station must constantly switch angles between the multiple target prisms to complete the measurement, which will accelerate the wear of the total station shafting and affect the life of the instrument, because each target prism must be measured , the overall time required is long; the use of the multi-prism method is often limited by the narrow installation location of the working condition, and it is difficult to achieve standardized installation; when the shield machine is working on a small radius turn, the total station often cannot observe target prism, making it impossible to complete the measurement

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