| 摘要 |
There is provided an apparatus and a method for detecting buried, elongated, electromagnetically detectable objects. The objects may be detectable as they are, e.g. iron pipes or metallic cables, or they may be made detectable by a tracer. The present invention provides an apparatus where the transmitter means or the receiver means, or both (14), are provided with electromagnetic shield means (12) covering a spatial angle of at least 180 DEG in relation to the transmitter means (14) or the receiver means (14). The shield (12) may be made so effective, that it may be fastened on the downward-facing side of an excavator. Thereby the transducer part (10) of the apparatus is not in such a vulnerable position and it may be easy to connect the transducers to a central processing and display unit close to the operator of the excavator. |
