Levelling rod, level determining apparatus for said rod, and...

Details Levelling rod, level determining apparatus for said rod, and... Levelling rod, level determining apparatus for said rod, and...

G - Physics

01

C

G01C 15/06 (2006.01) G01D 5/249 (2006.01)

Patent

CA 2563983

The levelling rod (1) for a level determining apparatus (2) has position indications therealong along expressed by barcode symbols (11, 12). At least some of said barcode symbols are colour barcode symbols, the colour serving to encode said position indications. The barcode symbols can be organised in first and second blocks (12, 11) of barcode symbols, each providing a position indication, wherein the length (Ls) occupied along the rod (1) by a first block (12) is smaller than the length (Lb) occupied along the rod by a second block (11), the first blocks thereby providing a finer position indication than the second blocks. The first blocks (12) of barcode symbols can be formed of monochrome and colour bar code symbols, e.g. just one colour barcode symbol and at least one monochrome barcode symbol, while the second blocks (11) can be formed purely of colour barcode symbols. The invention also relates to a level determining apparatus specifically adapted for the above rod, and to a method of using that rod.

La mire de nivellement (1) pour appareil de détermination de niveau (2) présente, sur sa longueur, des indications de position exprimées par des symboles code-barres (11, 12). Au moins certains desdits symboles code-barres sont des symboles code-barres couleur, la couleur servant à coder lesdites indications de position. Les symboles code-barres peuvent être organisés en premiers et seconds blocs (12, 11) de symboles, chacun fournissant une indication de position, la longueur (Ls) occupée le long de la mire (1) par un premier bloc (12) étant inférieure à la longueur (Lb) occupée le long de la mire par un second bloc (11), les premiers blocs fournissant une indication de position plus affinée que les seconds blocs. Les premiers blocs (12) des symboles code-barres peuvent être formés de symboles code-barres monochrome et de couleur, par exemple, un seul symbole code-barres de couleur, et au moins un symbole code-barres monochrome, tandis que les seconds blocs (11) peuvent être formés uniquement de symboles code-barres monochrome. L'invention concerne en outre un appareil de détermination de niveaux, spécialement adapté pour la mire précitée, ainsi qu'un procédé d'utilisation de cette mire.

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