Sensor system for detecting dimensional variables to be measured on a rotating object

A sensor system for detecting at least one dimensional variable of a rotating object (30), having at least one sensor, disposed on the rotating object (30) and sensitive to the dimensional variable, and having means for picking up measurement signals from the at least one sensor and forwarding the signals to a processing device, which include an antenna array (11) for supplying the at least one sensor with high-frequency energy end for receiving a high-frequency signal, modulated as a function of the variable to be detected, from the sensor, characterized in that a plurality of such sensors are disposed on the object (30), distributed in the circumferential direction;

• and that the antenna array (11) has a directional characteristic (34) for transmission and/or reception which is stationary with respect to a coordinate system not rotating with the object (30) and which includes only a subregion (32) of the object (30).