Hexagon Technology Center Gmbh

Hexagon Metrology Ab

Hexagon Metrology Gmbh

Peter Champ

Paul Ferrari

Heinz Lippuner

Thibault Duportal

Hogar Tait

Laurent Desforges

Dongmei Hong

Jerry Gerent

Elie Shammas

Jean-Luc Famechon

Denny Roux

Jean-Paul Delemos

Thomas Jensen

Johan Stigwall

Knut Siercks

Beat Aebischer

Denis Roux

Patrick Ilg

Patryk Wroclawski

Matthias Geil

Sascha Schiwy

Kai Imhäuser

Lippuner Heinz

A method for calibrating a triangulation sensor including a light emitting unit for emitting measuring light and a light receiving unit. The light emitting unit is arranged with known position and orientation relative to the light receiving unit and the triangulation sensor which is adapted to provide triangulation-based position measurements. A calibration setup which comprises the triangulation sensor and a calibration target providing a defined calibration pattern, and a calibration measurement is performed with reference to the calibration target by means of the triangulation sensor. An image of the calibration target is captured by means of the light receiving unit, and the captured image is processed with deriving a pattern image position with reference to the inner sensor image coordinate system and deriving a light image position with reference to the inner sensor image coordinate system.

Calibration of a triangulation sensor

Some embodiments of the invention include a method for determining distances to an object to be measured based on the principle of triangulation, comprising generating and emitting a measuring light beam, directing the measuring light beam to the object to be measured, detecting a reflection of the measuring light from the object with respective pixels of an image sensor during a defined detection sequence (t-t) and deriving distance information based on the detected reflection. The detection sequence (t-t) comprises a number of at least two exposure sub-sequences each defining a particular exposure period and saturation limit for the pixels of the sensor, wherein a successive exposure sub-sequence comprises a higher saturation limit than its prior exposure sub-sequence and each saturation limit defines a maximum charging level of the pixels for the respective exposure sub-sequence.

Method and device for triangulation-based distance measurement

A distance measuring method for a point on an object is performed by emitting measurement radiation. When an optical measurement axis of the measurement radiation is aligned with the point to be measured, an optical measurement point region is defined by the beam cross section of the radiation on the object. The beam cross section may be, for example, a maximum of eight times the standard deviation of a Gaussian steel profile of the measurement radiation. The the distance to the point on the object is determined by receiving measurement radiation reflected from the object. The method includes altering, at least once, a measurement direction as emission direction of the measurement radiation with respective emission and reception of the measurement radiation. Altering the measurement direction is carried out such that respective area centroids defined by the beam cross section on the object lie within the measurement point region.

Optical individual-point measurement

A coordinate measurement device comprises an articulated arm and a laser scanner assembly. The articulated arm can have a first end, a second end, and a plurality of jointed arm segments therebetween. Each arm segment can define at least one axis of rotation, and a last axis of rotation can be defined by bearings near a distal end of the arm. The laser scanner assembly can couple to the distal end of the arm. The arm can continuously generate trigger signals that are received by the laser scanner and indicate a time at which the arm's position is measured.

Enhanced position detection for a CMM

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Pinner, United Kingdom

Peter Champ