LOCAL AREA MOBILE OBJECT FIND-OUT SYSTEM ADN ITS TRANSMITTER

摘要

PURPOSE:To provide the local area mobile object find-out system in which and existing area of a mobile object within a limited premises or building is being narrowed suit ably. CONSTITUTION:Transmitters 11-15 are carried by infants moving in a recreation ground PK. Three reception stations 11-15 or over are arranged distributedly in the recreation ground and its peripheral parts. Two or over terminal equipments 41-43 are arranged distributedly in the recreation ground. The reception stations 11-15, the terminal equipments 41-43 and an information processor 30 are connected to make data communication. The reception stations 11-15 receive a radio wave emitted from transmitters 21-23 and measure the reception strength of the wave and send the result to the information processor 30. When an ID card is inserted to any of the terminal equipement 41-43, the recorded transmitter ID code is sent from the terminal equipments 41-43 to the information processor 30 and the information processor 30 narrows the resident area of the infant carrying the transmitter based on the reception strength of the radio wave emitted by the transmitter corresponding to the transmitter ID code and informs the terminal equipment of the result. The terminal equipement illustrates the resident area of the infant graphically.