Installation for determining the spatial coordinates of a point on a piece, in particular for controlling a plant such as a welding plant for the car bodies of motor vehicles
First Claim
1. Installation for determining the spatial coordinates of a point (P) on a piece (7), in particular for controlling a plant such as a welding plant for the car bodies of motor vehicles, which installation is characterised in that it comprises a head (11) displaceable in a plane (X-Y), a laser beam position detector on the head, which position detector comprises means (21) for projecting a laser beam (211) to the point (P) of the piece (7) of which the coordinates are required to be measured and a detector (22) for receiving the laser beam (213) reflected from the piece (7) at the point (P) in order to produce a signal which is a function of the distance of the point (P) from the plane (X-Y), a rotor (13) on the head (11), the axis of rotation (111) of this rotor being perpendicular to the plane (X-Y), this rotor comprising means (26) for projecting a rotating laser beam (214), at least three fixed targets (Q, R, S) placed in the plane (X-Y) and the coordinates of which in this plane are known, these tarets being capable of producing a signal as a function of the position (Xp, Yp) of the head (11) and hence of the point to be measured (P) in the plane (X-Y), calculating means for receiving the two signals (23,28) and determining the spatial coordinates (Xp, Yp and Zp) of the point to be measured (P), and display means (15) for displaying these coordinates.
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Accused Products
Abstract
An installation for determining the spatial coordinates of a point (P) on a piece (7) in particular for controlling a plant such as a welding plant for car bodies of motor vehicles. The installation is characterized in that it comprises a head (11) movable in a plane (X-Y) and produces a signal as a function of the distance of the point (P) in relation to the plane (X-Y), a rotor (13) on the head (11), this rotor comprising means for projecting a rotating laser beam (214), at least three fixed targets (Q, R, S) arranged in the plane (X-Y) and the coordinates of which in this plane are known, these targets being capable of producing a signal as a function of the position (XP -YP) of the head (11) and hence of the point to be measured (P) in the plane (X-Y). The invention is applicable to an installation for determining the spatial coordinates of a point.
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Citations
17 Claims
- 1. Installation for determining the spatial coordinates of a point (P) on a piece (7), in particular for controlling a plant such as a welding plant for the car bodies of motor vehicles, which installation is characterised in that it comprises a head (11) displaceable in a plane (X-Y), a laser beam position detector on the head, which position detector comprises means (21) for projecting a laser beam (211) to the point (P) of the piece (7) of which the coordinates are required to be measured and a detector (22) for receiving the laser beam (213) reflected from the piece (7) at the point (P) in order to produce a signal which is a function of the distance of the point (P) from the plane (X-Y), a rotor (13) on the head (11), the axis of rotation (111) of this rotor being perpendicular to the plane (X-Y), this rotor comprising means (26) for projecting a rotating laser beam (214), at least three fixed targets (Q, R, S) placed in the plane (X-Y) and the coordinates of which in this plane are known, these tarets being capable of producing a signal as a function of the position (Xp, Yp) of the head (11) and hence of the point to be measured (P) in the plane (X-Y), calculating means for receiving the two signals (23,28) and determining the spatial coordinates (Xp, Yp and Zp) of the point to be measured (P), and display means (15) for displaying these coordinates.
Specification