Posture recognition-based device for preventing worker from dozing

The invention discloses a device and method for preventing a crane worker from dozing based on posture recognition in the technical field of alarm devices, and the device comprises a safety helmet body, a rechargeable battery, an air hole, a knocking device, a U-shaped rod, an iris recognition switch, a positive and negative rotation motor, a normally open button switch, an alarm trigger module, a controller module, a wireless alarm module and a PLC. The shaking sensor and the safety helmet body are matched with each other to monitor the posture of the head of a crane worker, when the crane worker dozes off and the head of the crane worker shakes up and down, the forward and reverse rotation motor can drive the U-shaped rod to enable the iris recognition switch to be aligned with the eyes of the crane worker; when the crane is in use, the knocking device is triggered to strike the head, the electric bell rings, meanwhile, remote alarm can be generated, monitoring personnel can actively make a call to a crane