Seismic surveillance system
作者： Kurt Ikrath , Ronald F. Johnson
DOI:
关键词: Field (physics) 、 Geology 、 Seismology 、 Amplitude 、 Tree (data structure) 、 Transmitter
摘要: A seismic surveillance system for detecting intruders, and the like. seic transmitter coupled to trunk of a tree establishes field in earth via roots tree. receiver similarly another detects presence an intruder on which is established detected by noting changes phase, amplitude, or frequency field.
lens.org 参考文章(2)
Kurt Ikrath, Wilhelm A Schneider, Morris Acker, Helical coil coupled to a live tree to provide a radiating antenna ,(1970)
Ikrath Kurt, Self-excited seismic systems ,(1964)