Pump set equipment diagnosis method, system and equipment based on curve fitting contrastive analysis

The invention discloses a pump set equipment diagnosis method based on curve fitting contrastive analysis. The pump set equipment diagnosis method comprises the following steps: sampling pump set equipment to obtain vibration data; judging the period of the vibration data, and calculating the error upper limit and the error lower limit of the vibration data of each corresponding point position indifferent periods; establishing a rectangular coordinate system by taking time as a horizontal axis and the numerical value of the vibration data as a longitudinal axis, connecting the error upper limit of each point location as an upper limit curve, sequentially connecting the error lower limit of each point location as a lower limit curve, and taking a part between the upper limit curve and thelower limit curve as a vibration allowable domain; and judging the health state of the pump set equipment by comparing whether the real-time vibration data of the pump set equipment is in a vibrationallowable domain . 本发明公开了一种