A basic analysis to develop automatic tracking system for stray aged-persons by use of personal handy-phone system

A population of aged-persons is increasing in the world, because of advance of medical technics and decrease in birth rate, A part of the aged-persons who are suffering from senile dementia, are not able to recognize one's location or time in sometimes, Using the proposed system, a family of the aged-persons and co-workers are able to know the location of the aged-persons, if the I,el sons stray on a street, In this system, Personal Handy-phone System (PHS) is applied to track the aged-persons, The relay stations of PHS are located at several place. For example, the stations are located top of telephone bos on a street, each floor and each top of a building, at a subway station and so on. So, it is able to track the aged-persons to apply the PHS for detecting. In this paper, signal intensity distribution of handy electronic marker of the system is analyzed.