SAFETY CONTROLLER FOR VERTICAL TRANSPORTATION MACHINERY WITH MICROCOMPUTER

This invention includes various detector devices, such as the detector for foreign bodies at the arm end, the detector for high voltage electric field, the detector for breaking plys in the cable, the detector for displacement of supporting legs, the orientation detector, the wind velocity detector, the ground inclination detector, the detector for altitude of a hung hook, the detector for arm length of laser and others. They employ microcomputer processing, and possess the functions of display, alarm and automatic control and can be used as the safety devices for various hoisting, lifting and excavating equipments used in the fields of dock and port, construction site mine, etc.