Aerial work platform counterweight-free calibration method and device and overload detection method

The invention provides a counterweight-free calibration method and device for an aerial work platform and an overload detection method. The counterweight-free calibration method comprises the following steps: carrying out no-load calibration on the used aerial work platform; obtaining an original no-load calibration curve and an original full-load calibration curve of the aerial work platform; selecting a target calibration curve; fitting to obtain a fitting curve corresponding to the non-target calibration curve; determining the pressure of the hydraulic system corresponding to a new full-load calibration curve according to a preset relational expression, and taking the independent variable of the target calibration curve as the independent variable of the new full-load calibration curve; and storing the new full-load calibration curve in a memory of the aerial work platform. According to the scheme, overload calibration of the aerial work platform can be completed under the condition that no standard weight