Overload protection system and method for measuring hopper

The invention provides an overload protection system and method for a measuring hopper. The system comprises an overload monitoring device and an automatic control device, wherein the overload monitoring device comprises a swing arm, a support, a motor, a swing sensor and an alarm; one end of the swing arm is mechanically connected with the motor, and the other end of the swing arm is arranged at the upper limit position of the normal coal level in the measuring hopper; the support is arranged on the side wall of the measuring hopper; the motor is fixedly arranged on the support; the swing sensor is mechanically connected with the swing arm; and the swing sensor is electrically connected with the alarm and the automatic control device. By means of the overload protection system and method for the measuring hopper, jamming caused by excessive coal loading of the measuring hopper is avoided, the safety coefficient is increased, and the phenomena that excessive coal loading of the measuring hopper is caused, and