Turbine guider casting throat area detection device and method

The invention provides a turbine guider casting throat area detection device and method.The turbine guider casting throat area detection device comprises a detection shell, a size measurement assembly and an area detector, the detection shell comprises a bottom plate, a fixed mounting plate and a baffle, the fixed mounting plate is provided with the size measurement assembly, and the size measurement assembly comprises a pulley block, a measurement rope, a telescopic arm and a roller; a measuring rope is arranged on the pulley block, one end of the measuring rope is connected with the detection mechanism, the other end of the measuring rope is connected with one end of the telescopic arm, the other end of the telescopic arm is provided with a roller, the roller is in contact with a to-be-measured area, coordinates are obtained by calculating the lengths of the measuring rope and the telescopic arm, and then the area is measured; according to the method, the coordinates of the position point where the roller o