MOUNTAINEERING ACCIDENT SUFFERER SEARCH SYSTEM

摘要

PROBLEM TO BE SOLVED: To develop a mountaineering accident sufferer search system to be utilized for rescue by determining the position of a mountaineering accident sufferer from a place as distant as possible. SOLUTION: A search radio wave 31 carrying a discrimination code for identifying a searched-for terminal 1 possessed by the accident sufferer is sent from a search terminal 2 possessed by a rescue team. The electric field intensity of the radio wave 31 at the time of transmission is stored in the terminal 2. The terminal 1 measures the electric field intensity of the radio wave 31 on receiving it and transmits a response radio wave 32 carrying this value toward the terminal 2. The terminal 2 calculates a distance from the attenuation rate of the transmitted radio wave 31 and let the rescue team know the distance while it determines the direction of the terminal 1 based on the phase difference of the radio wave 32 arriving at two antennas 13 and 14 of the terminal 2, thereby determining the position of the sufferer.