Patent ID: 7343166

Claim:
A monitor system configured to monitor a monitoring object with a position-related signal from a satellite positioning system, comprising: a terminal unit adapted to be attached to the monitoring object; and a monitor apparatus configured to communicate with the terminal unit to monitor a position of the terminal unit, wherein the terminal unit includes a terminal-end positioning portion configured to receive a position-related signal from the position-information satellite and locate a position of the terminal unit, a terminal-end predetermined-zone information storing portion configured to store predetermined zone information, a terminal-end positioning-interval information storing portion configured to store positioning-interval information, which indicates a positioning time interval at which a position of the terminal unit is to be located; a terminal-end first-located position information storing portion configured to store first-located position information, a terminal-end second-located position information storing portion configured to store second-located position information, the second-located position information being obtained upon a lapse of the positioning time interval after the first-located position information is obtained, a terminal-end inside/outside-of-predetermined-zone deciding information storing portion configured to store inside/outside-of-predetermined-zone deciding information for determining whether the first and second-located positions are within the predetermined zone, a terminal-end third-located position information acquiring information storing portion configured to store third-located position information acquiring information, which is a condition for acquiring third-located position information, the third-located position information acquiring information being a condition that one of the first and second-located positions is within the predetermined zone and the other of the first and second-located positions is outside the predetermined zone, the third-located position information being acquired before a lapse of the positioning time interval after the second-located position is located if the condition of the third-located position information acquiring information is satisfied, a terminal-end inside/outside-of-predetermined-zone confirming information storing portion configured to store inside/outside-of-predetermined-zone confirming information, which is a condition that one of the first and third-located positions is within the predetermined zone and the other of the first and third-located positions is outside the predetermined zone, and a terminal-end report information storing portion configured to store report information to be reported to the monitor apparatus if the condition of the inside/outside-of-predetermined-zone confirming information is satisfied.