Importance

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Abstract

An arrangement comprising a laser beam receiver and a canal building laser device is intended to be disposed in a pipeline. The canal building laser device is located in a shaft at the beginning of the pipeline and the laser beam receiver is located at the end of the portion of the pipeline produced, for example, the previous day, in the region of a still open pit. Owing to the distance from the laser beam receiver and the unevenness of the pipe, it should be assumed, even with careful locating of the canal building laser device, that a laser beam from the laser device does not impinge exactly on the laser beam receiver. The laser beam receiver has an infrared light source for transmitting a control signal to an infrared light receiver on the canal building laser device. The angle of emergence of the laser beam emitted by the canal building laser may be remotely controlled via control buttons on the laser beam receiver. The laser beam may therefore conveniently be centred onto the longitudinal axis of the pipeline. If the laser beam is located in the region of detection of the target field of the laser beam receiver it may even be orientated automatically.

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First Claim