摘要:
The invention relates to a method for determining at least one influencing variable acting on the eccentricity in a goniometer, using a detector arrangement consisting of four optical detector elements, and a rotational body comprising a plurality of pattern elements arranged around a pattern center, the rotational body being rotatably arranged about an axis. According to said method, at least some of the pattern elements are reproduced on the detector arrangement, the positions of the pattern elements reproduced on the detector arrangement are resolved, and the eccentricity of the pattern center in relation to a detector center of the detector arrangement is determined. A plurality of such eccentricity measurements for different rotational positions enables different influencing variables acting on the current eccentricity to be separated, especially by forming units.
摘要:
The invention relates to a method for determining at least one influencing variable acting on the eccentricity in a goniometer, using a detector arrangement consisting of four optical detector elements, and a rotational body comprising a plurality of pattern elements arranged around a pattern center, the rotational body being rotatably arranged about an axis. According to said method, at least some of the pattern elements are reproduced on the detector arrangement, the positions of the pattern elements reproduced on the detector arrangement are resolved, and the eccentricity of the pattern center in relation to a detector center of the detector arrangement is determined. A plurality of such eccentricity measurements for different rotational positions enables different influencing variables acting on the current eccentricity to be separated, especially by forming units.
摘要:
Measurement method where a code projection which is dependent on a three-dimensional position of a code carrier relative to a sensor arrangement is generated on a sensor arrangement, and at least part of the code projection is captured. An angular position of the code carrier with reference to the defined axis of rotation is ascertained and a current measurement position of the measurement component relative to a base is determined, wherein, a position value for at least one further degree of freedom of the code carrier relative to the sensor arrangement is ascertained on the basis of the code projection and is taken into account to determine the current measurement position, and a relative position of the connecting element with respect to the holder and/or the deformation thereof is determined from the position value in the form of a change in shape or size.
摘要:
An optoelectric angle-measuring device according to the invention has a code carrier having a position code (C1) which can be detected optically as well as a scanning device in the form of a light-sensitive row or area for detecting the position code (C1) and generating a position-dependent scanning signal. The scanning device which is in the form of a scanning film (F1), in particular, surrounds the code carrier or the code carrier essentially completely surrounds the scanning device along a circumference. This provides an extremely accurate angle-measuring device by virtue of the fact that a large part of the position code (C1), in particular even the entire position code (C1), can be detected.
摘要:
The invention relates to a calibration method that can be carried out without a reference system for an angle measuring device having a code carrier carrying an absolute position code, and at least two reading heads comprising a fixed, known angle position at an angular distance, wherein the code carrier can be rotated relative to the reading heads, and different angle positions of the code carrier relative to the reading heads can thus be captured. Angle position values of the reading heads in an angular setting are determined and angular error is determined, which are repeated. And, a mathematical analysis method is performed, including determining the parameters of a mathematical function quantifying the angular error, and determining calibration parameters as parameters of the quantifying mathematical function or as a correction or code table derived from the parameters.
摘要:
The invention relates to a calibration method that can be carried out without a reference system for an angle measuring device having a code carrier carrying an absolute position code, and at least two reading heads comprising a fixed, known angle position at an angular distance, wherein the code carrier can be rotated relative to the reading heads, and different angle positions of the code carrier relative to the reading heads can thus be captured. Angle position values of the reading heads in an angular setting are determined and angular error is determined, which are repeated. And, a mathematical analysis method is performed, including determining the parameters of a mathematical function quantifying the angular error, and determining calibration parameters as parameters of the quantifying mathematical function or as a correction or code table derived from the parameters.
摘要:
The invention relates to a measuring head system (1) for a coordinate measuring machine, having a scanning element (6), which has a part provided for contacting a measured object as a contacting part (5), which can be moved in relation to a fixed measuring head base (2) in a lateral x direction (20) and a lateral y direction (21), such that an object to be measured can be mechanically scanned using the scanning element (6). An optical sensor (10), having a sensor line (11) which can be read out and comprises a plurality of array sensor elements, is fixed on the measuring head base (2). Furthermore, means are provided, which are particularly disposed spatially fixed to the contacting part (5), generate a projection—as a function of displacements of the contacting part (5) in relation to the measuring head base (2)—on the sensor line (11) using at least one radiation source (15). In addition, an analysis unit is provided. The means have at least one first mask element (17), which is implemented to generate a first partial projection on the sensor line (11) such that said partial projection is optimized to determine an x displacement and a y displacement of the contacting part (5) in relation to the measuring head base (2) in the x direction or y direction. The analysis unit is configured to determine the x displacement and the y displacement from signals only generated by the one sensor line (11).
摘要:
A measuring method for determining a measurement position of a probe element 6 can include using a coordinate measuring machine 1 having a base and members that can be moved relative to the base and relative to each other, wherein one of the members, as the probe member TG, comprises a probe element 6, so that the probe element 6 can move freely within a prescribed volume of space, wherein the measurement position is captured by the probe element 6, a measurement variable set is taken by measuring measurement variables linked to a measurement position of the members, wherein the measurement position is determined by a relative location of the members to each other and of at least one of the members to the base, and the measurement position is determined relative to the base.
摘要:
A method of operating an articulated arm CMM is provided. One or more coordinates on an object can be measured with the articulated arm CMM. At least one of the encoders can then be at least partially powered-off. The encoder can then be powered on and one or more coordinates on the same object can be measured without recalibrating the encoder.
摘要:
A measuring head system for a coordinate measuring machine, having a scanning element for contacting a measured object as a contacting part, which can be moved such that an object to be measured can be mechanically scanned using the scanning element. An optical sensor is fixed on the measuring head base. Means are provided to generate a projection on the sensor line using at least one radiation source. The means have at least one first mask element to generate a first partial projection on the sensor line such that said partial projection is optimized to determine an x displacement and a y displacement of the contacting part in relation to the measuring head base in the x direction or y direction. An analysis unit is configured to determine the x displacement and the y displacement from signals only generated by the one sensor line.