Underground electromagnetic pressure pulse generating device and control method

The invention provides an underground electromagnetic pressure pulse generating device and a control method. The generating device comprises an upper joint, a lower joint, an upper central tube, a pressure sensor, a pulse generator, a lower central tube, a copper contact pin assembly and a conductive slip ring, the upper end of the upper joint is connected with an underground tool, and the lower end is connected with the upper central pipe; the pressure sensor is arranged on the lower end face of the upper connector. The upper central pipe is respectively connected with the pulse generator and the lower central pipe; the other end of the lower central pipe is connected with the lower joint; the copper contact pin assembly is arranged at the tail end of the lower central tube; the conductive slip ring is arranged on the upper end surface of the lower joint; a telescopic copper needle is arranged between the copper contact pin assembly and the conductive slip ring, relative rotation of the copper contact pin as