Crane and control method therefor

A control method of a crane, comprising:

• obtaining a tension value of a luffing mechanism to a boom;
• and
• determining an arm length of the boom exceeds an arm length threshold if a tension value is greater than a tension threshold;
• wherein
• before determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold, the control method further comprises:
• obtaining a horizontal inclination angle value of the boom;
• wherein determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold comprises:
• determining the arm length of the boom exceeds the arm length threshold if the horizontal inclination angle value is less than an angle threshold and the tension value is greater than the tension threshold;
• and
• after determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold, the control method further comprises:
• generating a protection signal, wherein the protection signal is used for prohibiting the luffing mechanism from performing the boom lifting.

A non-transitory computer readable storage medium on which a computer program is stored, wherein, when the computer program is executed by a processor, steps of a control method of a crane implemented by the processor comprise:

• obtaining a tension value of a luffing mechanism to a boom;
• determining an arm length of the boom exceeds an arm length threshold if a tension value is greater than a tension threshold,
• wherein before determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold, the steps of the control method of the crane implemented by the processor further comprise:
• obtaining a horizontal inclination angle value of the boom;
• wherein determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold comprises:
• determining the arm length of the boom exceeds the arm length threshold if the horizontal inclination angle value is less than an angle threshold and the tension value is greater than the tension threshold;
• and
• after determining the arm length of the boom exceeds the arm length threshold if the tension value is greater than the tension threshold, the steps of the control method of the crane implemented by the processor further comprise:
• generating a protection signal, wherein the protection signal is used for prohibiting the luffing mechanism from performing the boom lifting.