The invention is a grounding device that grounds the wearer when the wearer is in a designated area and automatically disengages when the wearer leaves the designated area. In each of the rotor blades, a jackscrew mechanism is arranged therein and includes a jackscrew arranged in the radially internal blade part and a nut connected with the radially external blade part, the nut cooperating with the jackscrew for radially moving the radially external blade part with respect to the radially internal blade part. The video system includes a multi-wire cable extending therefrom and the multi-wire cable passes through the first extension arm, wherein the multi-wire cable includes a connection assembly at a distal end thereof. A monitoring node tool detects deviation from the ordinary operation state of the target system based on an actual operation state of the target system and the agreement graph.