| 摘要 |
The invention relates to a sensor unit comprising a patterned encoding device (12) and a detector device (14), wherein the detector device (14) and the encoding device (12) are displaceable in relation to one another, and wherein the detector device (14) is adapted to read the pattern on the encoding device (12) upon relative displacement between the detector device and the encoding device and produce a first encoding signal (10A, 10B) which indicates this mutual change in position. The sensor unit also includes a signal processing unit (40, 110, 60, 190) which is constructed to interpret the first encoding signal (10A, 10B) and to produce therefrom at least one digitally expressed output signal (U1; U2; U3, U4) containing a predetermined number of bits. The unit also includes adjustment means (110, 50, 190) which can be set to provide a selectable resolution of the digitally expressed output signal. <IMAGE> |
