摘要:
Ein Verfahren zum mit geodätischer Genauigkeit erfolgenden Positionsbestimmen eines Zielpunkts auf einem Zielobjekt (15) unter Verwendung eines geodätischen Vermessungsgeräts (1) weist eine Anzieleinrichtung, insbesondere ZielFernrohr, auf, wobei die Anzieleinrichtung gegenüber einer Basis des Vermessungsgeräts zur Änderung deren Ausrichtung schwenkbar ist und zumindest eine eine optische Zielachse definierende Objektiveinheit, eine elektronische Distanzmesseinheit, und eine Wärmebildkamera zur Erfassung eines Wärmebildes in Richtung der optischen Zielachse umfasst. Zusätzlich sind eine Winkelmessfunktionalität zur hochpräzisen Erfassung der Ausrichtung der Zielachse, und eine Steuerungseinheit zur Steuerung der Winkelmessfunktionalität und der Wärmebildkamera sowie insbesondere der Ausrichtung der Anzieleinheit, vorgesehen. Erfindungsgemäss werden in einem Wärmebildmessmodus durch Auslösen eines Messvorgangs dabei bestimmte Positionsdaten des angezielten Zielpunktes mit einer Temperaturinformation, die aus dem Wärmebild für den mit der Zielachse anvisierten Zielpunkt ausgelesen wird, verknüpft, insbesondere wobei ein mit der Temperaturinformation korreliertes Abspeichern der Positionsdaten des Zielpunktes erfolgt.
摘要:
Systems, methods, and devices are disclosed for predictive shimming of large structures. Systems may include a remote device configured to move along a first path relative to a first vehicle structure. The remote device may be configured to move a sensor device along a plurality of measurement points included in the first path. A base device may be configured to identify a position of the sensor device at each measurement point. The base device may be configured to generate measurement data including a first plurality of measurements identifying at least one structural dimension of a first surface of the first vehicle structure. A controller may be configured to control operation of the base device and the remote device based on engineering data associated with the first vehicle structure. The controller may be further configured to determine at least one shim dimension associated with the first surface.
摘要:
Systems, methods, and devices are disclosed for predictive shimming of large structures. Systems may include a remote device configured to move along a first path relative to a first vehicle structure. The remote device may be configured to move a sensor device along a plurality of measurement points included in the first path. A base device may be configured to identify a position of the sensor device at each measurement point. The base device may be configured to generate measurement data including a first plurality of measurements identifying at least one structural dimension of a first surface of the first vehicle structure. A controller may be configured to control operation of the base device and the remote device based on engineering data associated with the first vehicle structure. The controller may be further configured to determine at least one shim dimension associated with the first surface.
摘要:
Methods and apparatus are provided for processing of data representing points in space wherein each is represented by components defining its position in a coordinate system and at least one parameter. For each point, the data are separated into a layer per component, and each component is assigned to a cell of a two-dimensional grid of cells such that corresponding cells of multiple layers contain the components of a point. A component of a point is retrieved by reference to a grid position corresponding to the point and to a layer corresponding to the component. Each layer is segmented into patches of cells such that a component of a point can be retrieved by reference to a grid position of a patch within a layer and to a grid position of a cell within a patch. A layer is compressed using an associated codec.
摘要:
A method and apparatus for measuring three-dimensional (3-D) coordinates. A 3-D object can be digitized into a mesh representation manipulable by a computer system (18) by tracing a stylus of a probe apparatus (22) over surfaces of the object. The probe apparatus includes an arm having a series of linkages and joints. The arm can be assembled by placing the ejoints of the arm in joint fixtures a desired distance and angle apart and bonding the joints to a linkage. The probe apparatus is calibrated by placing the etip of the stylus (22) at an arbitrary point in a work volume and varying the stylus orientation to find error values and determine calibration parameters. The sensors of the probe apparatus are zeroed by placing the probe apparatus in the only posible home position and assigning assumed starting angle to the sensors.
摘要:
A dynamic random access memory ('DRAM') device is operable in either a normal refresh mode or a static refresh mode, such as a self-refresh mode. A cell plate voltage selector couples a voltage of one-half the supply voltage to the cell plate of a DRAM array in a normal refresh mode and in the static refresh mode when memory cells are being refreshed. In between refresh bursts in the static refresh mode, the cell plate voltage selector couples a reduced voltage to the cell plate. This reduces the voltage across diode junctions formed between the source/drain of respective access transistor and the substrate. The reduced voltage reduces the discharge current flowing from memory cells capacitors, thereby allowing a reduction in the required refresh rate and a consequential reduction in power consumption.