Detection method for lifting hook height, crane, storage medium and controller

The embodiment of the invention provides a lifting hook height detection method, a crane, a storage medium and a controller. The detection method is applied to the crane, the crane comprises a suspension arm and a winch roller, the top of the suspension arm is provided with a height sensor, the winch roller is internally provided with a rotary encoder, and the detection method comprises the following steps: determining a plurality of measurement errors of the height sensor; determining a trust coefficient of the height sensor according to the plurality of measurement errors; detecting the rotating speed of the winch roller in real time through a rotary encoder, and determining the moving speed of the lifting hook according to the rotating speed of the roller; determining a first height of the lifting hook at the previous moment and a second height of the lifting hook at the current moment through a height sensor; and determining the actual height of the lifting hook at the current moment according to the firs