| abstract |
Sensor for enabling positioning of a flexible element subject to applied forces, the sensor comprises at least two spatially separated light permeable tubes, 10 each having a first end 1a, 10a arranged on a first frame portion 11a 5 and a second end 1b, 10b arranged on a second frame portion 11b of the flexible element. Each of the light permeable tubes in the sensor comprises a light detecting device 3, that is connectable to a processing unit 4, and arranged at a light detecting position of each of the light permeable tubes and configured to detect light emitted from a light emitting source 2 through each 10 of the at least two light permeable tubes 1, 10 and configured to transfer information comprising information relating to the detected light to the processing unit 4. |