The invention discloses a
shield tunneling machine upper shield deformation detection and online
correction method. The method includes the steps that
laser scanning data of N measuring areas of a shield are collected respectively, the fitting
diameter of the shield is obtained according to the
laser scanning data, and a three-dimensional image of the shield is obtained through rendering; whetherthe difference value of the fitting
diameter and the design
diameter of the shield is in the preset range or not is judged, and if the difference value of the fitting diameter and the design diameterof the shield is in the preset range, scanning is stopped; and if the difference value of the fitting diameter and the design diameter of the shield is not in the preset range, the position of a supporting point of the shield is adjusted according to the shield deformation reflected by the three-dimensional image,
laser scanning data of all the measuring areas are collected again, subsequent stepsare executed, and scanning is stopped till the difference value of the fitting diameter and the design diameter of the shield is in the preset range. By means of the method, deformation of a workpiece can be accurately obtained, errors between the deformation of the workpiece and the theoretical
mathematical model are obtained, and therefore proper correction can be conducted conveniently. In addition, the method is not limited by to-be-machined sizes, the measuring and detection size range is enlarged, an existing cumbersome measuring mode is changed, and the measuring efficiency and the measuring quality are improved.