Patent ID: 7992314

Claim:
A measuring device for performing at least one-dimensional coordinate measurement on a work piece according to one or plural measuring functions selectable by an operator, said measuring device comprising: a base piece ( 3 ; 63 , 64 , 66 ), where a scan head ( 8 ) is supported moveable in longitudinal direction in order to be positionable by an operator in the respective measuring position, a measuring system ( 19 ) for detecting the movement of the scan head ( 8 ) and for generating measuring signals ( 25 ) characterizing said movement; and, a processing device ( 31 ) for receiving the measuring signals ( 25 ) provided by the measuring system ( 19 ) and for processing and evaluating the measuring signals ( 25 ) according to predetermined logical rules ( 32 ) for determining movement measurement values characterizing a movement of the scan head ( 8 ) including its movement velocity and movement direction and for providing position measurement values characterizing the position of the scan head ( 8 ), the logical rules ( 32 ) comprise a decision logic ( 33 ) for automatically detecting a positioning performed by the operator solely based on the movement measurement values and the position measurement values, said decision logic ( 33 ) for detecting the measurement function intended by the operator and for initiating said measurement function, the decision logic ( 33 ) comprises a logic which is configured to: determine the velocity (v) at which the scan head ( 8 ) is moved and compare it with a first threshold value (V min ) characterizing a minimum movement velocity; determine the time interval (T) of the movement with the minimum movement velocity and compare said time interval to a second threshold value (T min ) characterizing a minimum time interval, determine the direction in which the scan head ( 8 ) is moved; and determine a positioning of the measuring head based on the result of the comparisons and select and initiate the suitable measuring function including the measuring direction.