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1. 发明申请

US20180372481A1 CALIBRATION OF A TRIANGULATION SENSOR 审中-公开
公开(公告)号：US20180372481A1
公开(公告)日：2018-12-27
申请号：US16015792
申请日：2018-06-22
申请人： HEXAGON TECHNOLOGY CENTER GMBH
发明人： Johan STIGWALL , Beat AEBISCHER , Peter CHAMP
IPC分类号： G01B11/00
摘要： 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.

2. 发明申请

US20170123053A1 METHOD AND DEVICE FOR TRIANGULATION-BASED DISTANCE MEASUREMENT 审中-公开
公开(公告)号：US20170123053A1
公开(公告)日：2017-05-04
申请号：US15343171
申请日：2016-11-03
申请人： HEXAGON TECHNOLOGY CENTER GMBH
发明人： Johan STIGWALL , Thomas JENSEN , Peter CHAMP
IPC分类号： G01S7/481 , G01S17/48
CPC分类号： G01S7/4816 , G01B11/25 , G01S7/4814 , G01S7/4868 , G01S17/48
摘要： 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 (t0-te) and deriving distance information based on the detected reflection. The detection sequence (t0-te) 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.

3. 发明申请

US20140211191A1 OPTICAL INDIVIDUAL-POINT MEASUREMENT 审中-公开
标题翻译：光学个性测量
公开(公告)号：US20140211191A1
公开(公告)日：2014-07-31
申请号：US14167918
申请日：2014-01-29
申请人： Hexagon Metrology GmbH , Hexagon Technology Center GmbH
发明人： Thomas JENSEN , Knut SIERCKS , Peter CHAMP , Matthias GEIL
IPC分类号： G01S17/02 , G01B5/008 , G01C15/00 , G01S17/08
CPC分类号： G01S17/023 , G01B11/026 , G01C3/06 , G01C15/002 , G01S17/08
摘要： 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 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.
摘要翻译：通过发射测量辐射来执行物体上的点的距离测量方法。当测量辐射的光学测量轴与要测量的点对准时，光学测量点区域由物体上的辐射的束横截面限定。梁横截面可以例如是测量辐射的高斯钢轮廓的标准偏差的八倍。通过接收从对象反射的测量辐射来确定与物体上的点的距离。该方法包括至少一次将作为测量辐射的发射方向的测量方向改变为相应的测量辐射的发射和接收。改变测量方向被执行，使得由对象上的光束横截面限定的各个区域重心位于测量点区域内。

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