An alignment device with one or two optoelectronic transmitting andor receiving units and an evaluation unit. The sensor compares a feedback voltage with a reference voltage. 2 protocol board, the extension of the system and the execution of dualization function of the V5. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. A top pulley is disposed on the pulley pole, a first bottom pulley is rotatably attached to the first support arm, and a second bottom pulley is rotatably attached to the second support arm. The device and invention is also used and applicable for other body motion disorders or detection and diagnostics.