| 摘要 |
The invention relates to a method for detecting measurement data on co-ordinate measuring and digitising machines. Usually, the position of the machine, e.g. the x-, y-, z-co-ordinate, has to be linked to a value, e.g. distance value, that is generated by callipers or a sensor for obtaining the space co-ordinates of a surface point during detection of geometries on a co-ordinate measuring machine or digitising machine. It has to be guaranteed that the information of the co-ordinate measuring machine and the sensor originate from the same measuring time, whereby said information has to be linked, when a measuring sensor is used for detecting the geometry of an object, e.g. a free forming surface, and when said sensor is moved during detection. When the measuring times of the co-ordinate measuring machine and the sensor are determined by an electric signal (trigger), the equality thereof can be guaranteed and the influence of signal propagation delays can be excluded. The n<th >sensor information always corresponds to the n<th> machine information. Allocation is made easier when each value detected at a measuring time obtains an identifier. In one embodiment, surface points of a free forming surface can be detected during movement of the sensor on the co-ordinate measuring machine and by means of a measuring sensor. The measuring times are determined by an electric signal that is produced by the sensor and is transmitted to the co-ordinate measuring machine. Said signal triggers distance measuring of the sensor as well as the output of the current machine position. |
