METHOD AND DEVICE FOR MEASURING THE SPATIAL EXTENSION OF AN OBJECT
First Claim
1. Method for the contactless, fast, and accurate measurement of the spatial extent of an object (1), e.g. a three-dimensional body, in which at least one laser (2) is being converted by means of an associated telecentric lens/Fresnel lens (3) or a parabolic mirror in each an orthogonal beam curtain (4) to the support surface of the object (1), so that a reflected laser light line (5) impinges on both sides of the object (1) to be measured, partially on the object and partially on the support surface, whereby each laser light line (5) which impinges the support surface is detected with at least one optical camera (6), which is arranged in a stationary position to the associated laser (2) outside the beam curtain (4) and a telecentric lens/Fresnel lens (7) or a parabolic mirror which detect the beams from this laser light line (5), the said beams being parallel to each other and comprise an acute angle with the beam curtain (4).
1 Assignment
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Accused Products
Abstract
The device comprises a measuring track (17) through which an object (1) is driven or moved, a laser (2) having a telecentric lens/Fresnel lens (3) for producing a perpendicular beam curtain (4) extending transversely to the measuring track (17). Furthermore, a camera (6) with an offset to the laser (2) in the longitudinal direction of the measuring track (17) likewise having a telecentric lens/Fresnel lens (7) placed in front. All light points of the laser light line (5) incident on the floor of the measuring track (17) that are reflected undisturbed on the floor of the measuring track (17) are detected at an acute angle from the beam curtain (4) using said camera. Furthermore, means for detecting and recording the speed of the object (1) moved on the measuring track (17) through the beam curtain (4) are provided so that a distance-time diagram can be created. From the data thus obtained, the floor contour of the object can be determined, in other words, the shadow of the object on the floor resulting from the vertically incident light. The maximum height of the object is also determined using a light barrier arrangement.
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Citations
11 Claims
- 1. Method for the contactless, fast, and accurate measurement of the spatial extent of an object (1), e.g. a three-dimensional body, in which at least one laser (2) is being converted by means of an associated telecentric lens/Fresnel lens (3) or a parabolic mirror in each an orthogonal beam curtain (4) to the support surface of the object (1), so that a reflected laser light line (5) impinges on both sides of the object (1) to be measured, partially on the object and partially on the support surface, whereby each laser light line (5) which impinges the support surface is detected with at least one optical camera (6), which is arranged in a stationary position to the associated laser (2) outside the beam curtain (4) and a telecentric lens/Fresnel lens (7) or a parabolic mirror which detect the beams from this laser light line (5), the said beams being parallel to each other and comprise an acute angle with the beam curtain (4).
- 7. Device for contactless, fast and accurate measurement of the spatial extent of an object (1), that means of a three-dimensional body consisting of a support surface for the object (1), a laser (2) with a telecentric lens/Fresnel lens (3) or with a parabolic mirror for the production of a beam curtain (4) extending orthogonally to the support surface, and further comprising a camera (6) which is offset with regards to the laser and equipped with forward-spaced telecentric lens/Fresnel lens (7) or a parabolic mirror in order to detect all undisturbed reflected light spots of the laser light line (5) impinging there at an acute angle with regard to the beam curtain (4).
Specification