公开(公告)号：US20240125597A1

公开(公告)日：2024-04-18

申请号：US18378108

申请日：2023-10-09

Applicant: HEXAGON TECHNOLOGY CENTER GMBH

Inventor： Beat AEBISCHER ,  Sybille Verena KOMPOSCH ,  Christian NIKLAUS ,  Philipp Lukas RÜST ,  Patrik Titus TÖNGI ,  Markus WENK

IPC: G01C5/00 ,  G01C15/00

CPC classification number: G01C5/00 ,  G01C15/002

Abstract: A surveying instrument, comprising at least one rotational movement axis such as a azimuth axis, which is for providing a positioning of the measurement direction of the surveying instrument, a rotational position encoder configured for deriving a rotational direction value around the movement axis and an acceleration sensor such as a MEMS-accelerometer for deriving a leveling for the surveying instrument and being rotatable around the rotational movement axis in different rotational positions. The instrument further comprises a mechanism designed to move the accelerometer from a first orientation in at least a second orientation, the second orientation being different to the first orientation, wherein the mechanism is designed and arranged in such a way that the targeting direction is uninfluenced by a movement of the accelerometer by the mechanism, and an evaluation unit configured to derive a calibrated leveling for the instrument.

公开(公告)号：US20180372481A1

公开(公告)日：2018-12-27

申请号：US16015792

申请日：2018-06-22

Applicant: HEXAGON TECHNOLOGY CENTER GMBH

Inventor： Johan STIGWALL ,  Beat AEBISCHER ,  Peter CHAMP

IPC: G01B11/00

Abstract: 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.

公开(公告)号：US20210191359A1

公开(公告)日：2021-06-24

申请号：US17112836

申请日：2020-12-04

Applicant: HEXAGON TECHNOLOGY CENTER GMBH

Inventor： Claudio ISELI ,  Bernd REIMANN ,  Michael SCHLENKRICH-ERASMUS ,  Jürgen SCHNEIDER ,  Katrin MENTL ,  Roland BURGSTALLER ,  Frank LAMPING ,  Alexandre HEILI ,  Asif RANA ,  Beat AEBISCHER

IPC: G05B19/404

Abstract: A computer program product and to a method for compensating thermal errors in a mechanical process, the mechanical process in particular provided by a mechanical device such as a coordinate measuring machine, a tooling machine or an articulated robot arm. Thermal errors arise due to thermal disturbances affecting the mechanical process, wherein thermal disturbances may arise from environmental influences affecting the mechanical process or from internally generated changing temperature distributions.

公开(公告)号：US20230125524A1

公开(公告)日：2023-04-27

申请号：US17974058

申请日：2022-10-26

Applicant: HEXAGON TECHNOLOGY CENTER GMBH

Inventor： Yves SALVADÉ ,  Markus SPRECHER ,  Peter KIPFER ,  Marcel ROHNER ,  Tim MAYER ,  Beat AEBISCHER

IPC: G01D5/30 ,  G01D18/00 ,  B25J19/02

Abstract: An image based opto-electronic encoder for a joint, the encoder having a reading head for the first part of the joint and an optical system, comprising a ball lens for the second part of the joint. The ball lens has a front surface transparent for measuring light and an at least partially reflective, structured back surface. The ball lens has -with respect to the measuring light- a refractive index of at least approximately two or an equal radially varying refractive index, such that a bundle of measuring light rays reflected inside the ball lens from a point of the back surface of the ball lens forms at least approximately a parallel bundle after getting refracted at the front surface of the ball lens. The reading head and the ball lens are rotatable relative to each other in at least two degrees of freedom.

公开(公告)号：US20210123735A1

公开(公告)日：2021-04-29

申请号：US17078850

申请日：2020-10-23

Applicant: HEXAGON TECHNOLOGY CENTER GMBH

Inventor： Sybille Verena KOMPOSCH ,  Markus WENK ,  Patrik Titus TÖNGI ,  Ismail Roman CELEBI ,  Beat AEBISCHER

IPC: G01C15/00 ,  G01C25/00

Abstract: A method for determining a calibrated leveling of a surveying instrument with an accelerometer. The method includes moving the accelerometer around a rotation axis of the instrument, the accelerometer being arranged at a known position from the rotation axis. As the accelerometer is moved, acquiring a movement profile of the movement by a rotational position encoder for the rotation axis and sensing an acceleration of the moving as accelerometer readings. Deriving at least one calibration parameter for the accelerometer readings is based on the movement profile, the known position and the corresponding accelerometer readings. A calibrated leveling is provided to the surveying instrument by applying the calibration parameter to the accelerometer readings.