Relative measuring method and relative measuring system...

G - Physics – 01 – S

Patent

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G01S 5/14 (2006.01)

Patent

CA 2585143

A measuring system wherein radio waves from a GPS satellite (4) are received by a reference station (1) and a plurality of mobile stations (3) to perform relative measuring among particular stations, thereby measuring the shift amounts of the mobile stations (3). At least one of the mobile stations (3) is disposed such that a baseline limit length allowing relative measuring relative to the reference station (1) is exceeded, and the intervals between particular mobile stations (3) are shorter than the baseline limit length allowing relative measuring. Each of the stations (1,3) is equipped with a GPS receiver (11,21) that receives the radio waves from the GPS satellite (4), and further equipped with a wireless communication apparatus (12,22) that transmits/receives data to/from a particular station. There are provided a relative shift amount calculation part (32) for calculating the relative shift amount between the particular stations; and a reference relative-shift-amount calculation part (33) for determining, based on a reference relative-shift- amount of one station that performs a relative measuring, a reference relative- shift-amount of the other station.

La présente invention concerne un système de mesure dans lequel des ondes radio provenant d'un satellite GPS (4) parviennent à une station de référence (1) et une pluralité de stations mobiles (3) pour réaliser une mesure relative parmi des stations particulières, mesurant ainsi les quantités de décalage des stations mobiles (3). Au moins une station mobile (3) est disposée de sorte que l'on dépasse une longueur limite de ligne de base permettant une mesure relative à la station de référence (1) et que les intervalles entre les stations mobiles particulières (3) soient inférieurs à la longueur de la limite de la ligne de base autorisant la mesure relative. Chacune des stations (1, 3) est équipée d'un récepteur GPS (11, 21) qui reçoit les ondes radio du satellite GPS (4) ainsi que d'un appareil de communication sans fil (12, 22) qui transmet des données vers une station particulière et en reçoit de celle-ci. L'invention concerne également une partie de calcul du décalage relatif (32) permettant de calculer le décalage relatif entre les stations particulières et une partie de calcul du décalage relatif de référence (33) pour déterminer, en se basant sur le décalage relatif de référence d'une station qui réalise une mesure relative, le décalage relatif de référence de l'autre station.

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