Bundling machine bale pressure detection device and detection method

The baler bale pressure detection device is installed on one side face of a baling connecting rod and comprises a push rod, one end of the push rod is connected with the baling connecting rod through a fixing base, and the other end of the push rod is connected with a main push rod at the input end of a special-shaped oil cylinder through a coupler; an auxiliary push rod at the output end of the special-shaped oil cylinder is connected with the first gear and can drive the first gear to rotate, the axis of the auxiliary push rod is perpendicular to the main push rod, the diameter of the main push rod is larger than that of the auxiliary push rod, and the main push rod and the auxiliary push rod form a primary amplification mechanism. The first gear is meshed with the second gear, and the first gear and the second gear form a secondary amplification mechanism; the center shaft of the second gear is connected with a photoelectric encoder, and when the second gear rotates, the photoelectric encoder collects the