Hydraulic part wear detection device, hydraulic system wear detection device and working machine

The invention relates to the field of wear detection, and provides a hydraulic part wear detection device, a hydraulic system wear detection device and an operating machine, comprising a detection power supply, a detection electrode, a current collector and a first control unit; one end of the detection power supply is connected with the to-be-detected hydraulic part, the other end of the detection power supply is connected with the detection electrode, the detection electrode is arranged in the hydraulic oil pipe, the hydraulic oil pipe is communicated with the to-be-detected hydraulic part, and the first control unit is connected with the current collector; the current collector is used for collecting a micro-current signal; the micro-current signal is generated through contact between charged particles generated by abrasion of the to-be-detected hydraulic part and the detection electrode; and the first control unit is used for acquiring the micro-current signal and analyzing and processing the micro-curren