Crane boom working parameter measuring method, controller, apparatus, and crane

The invention discloses a crane boom working parameter measuring method. A hinge connection point is adopted as a point C. A point B on the top of the boom is connected with a lifting hook pulley. The center of the lifting hook pulley is adopted as a point D. A horizontal range between the point B and the point D is dBD. A point A is set on a crane body (2). A horizontal range d0 and a vertical range h0 between the point A and the point B are measured; a horizontal range dAC between the point A and the point C is measured; and a vertical height hA of the point A relative to the ground is measured. A working amplitude of the boom (1) is calculated according to a formula of d=d0-dAC+dBD, and a working height of the boom (1) is calculated according to a formula that h=h0+hA. The invention also provides a controller and a measuring apparatus employing the measuring method. According to the invention, a differential distance measuring technology is adopted for measuring the working parameters of the crane. Current