PERSONAL SURVEY DEVICE FOR VICTIMS BURIED ALIVE AND SUBMERGED DURING LANDSLIDE AND SNOWSLIDE

摘要

PROBLEM TO BE SOLVED: To provide an efficient method of specifying the position of a victim under the ground surface or under the water surface. SOLUTION: A person with the possibility or intention of being buried in a medium which is not a conductor but high in electric impedance such as sediment or snow is made to wear or carry material such as a conductor with large difference in electric impedance from the medium or a device resonant, modulated, or the like by electromagnetic induction and electric conduction, and after the person is buried such as buried alive, a buried position is specified using a system of measuring conductivity or the difference of conductivity from other places using electromagnetic induction from the ground surface, on the water, in the water or in the air, or a system of measuring resistivity or the difference of resistivity from other places using electric conduction, or a system of measuring specific resistance or the difference of specific resistance from other places. For instance, when the amount of rainfall is large in a place in the mountains and a landslide is liable to occur, every inhabitant is made to wear this marker device 2 composed of a conductor and a magnetic substance, and at the time of being buried alive, the approximate position of a victim 1 excluding a depth direction is specified by a ground surface survey device 3 so as to be able to efficiently rescue the victim 1 or recover the body.