Method for detection of a track in the form of an elongated furrow or ridge in a field, combination of a farming implement and a driving unit with a feeding direction and detection unit

摘要

A carpet or like covering is fastened to a floor or like support surface by a sheet comprising a thermo-fusible material interposed between the carpet and floor. A field of vibrations suitable for heating the thermo-fusible material is applied to the exposed face of the carpet and the source is moved over the extent of the sheet.