Measuring system using laser technique for three-dimensional...

G - Physics – 01 – S

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G01S 17/89 (2006.01) G01C 15/00 (2006.01)

Patent

CA 2284025

The invention relates to a laser-assisted measuring system for three- dimensional objects and complex surfaces. In accordance with the invention, three- dimensional objects are preferably interior areas of buildings or geological hollows with complex surfaces. The invention makes a considerable contribution to the rationalisation and improvement of precision in measuring operations of this kind. In the known pulse operation time method, the distance is measured by a laser pulse from the transmitter to the measuring point and back. A measurement fan is generated on emission of laser pulses. In accordance with the invention, the measurement tan (11) must be turned 360° step by step at a constant speed, in order to cover a three-dimensional area. In a wall, up to 200,000 measuring points can be obtained. An appropriate evaluation of the measurement data takes place so chat a 3 D wire model can be constructed.

L'invention concerne un système de mesure assisté par laser et destiné aux objets tridimensionnels et surfaces complexes. Selon l'invention, on entend par objets tridimensionnels, de préférence, des espaces intérieurs de bâtiments ou des cavités géologiques aux surfaces complexes. L'invention constitue un apport capital dans la rationalisation et l'amélioration de la précision de telles opérations de mesure. Dans le procédé à durée d'impulsion connu, la distance est mesurée par une impulsion laser envoyée par l'émetteur sur le point de mesure puis renvoyée. L'émission d'impulsions laser génère un éventail de mesure. Selon l'invention, l'éventail de mesure (11) doit être tourné pas à pas de 360 DEG à une vitesse constante pour détecter un espace tridimensionnel. Sur une paroi, on peut obtenir jusqu'à 200.000 points de mesure. Il s'ensuit une évaluation adéquate des données de mesure pour la structure d'un modèle en fils 3-D.

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