| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mobile terminal system having an interlock function which can operate a field equipment only at a proper position by operating the field equipment only when a mobile terminal is operated in a sensor network. SOLUTION: A sensor 3 forms its operable range 6 and detects an operator and a mobile terminal 1 when they enter the range 6 where a certain field equipment 2 can be operated. Then the sensor 3 notifies a controller 5 of a fact that the operator and the terminal 1 entered the range 6 via a transmission line 8. Based on the sensor signal received from the sensor 3, the controller 5 decides via a terminal command decision part whether the operation command signal received from a radio receiver 4 passed through the range 6. The terminal command decision part receives a field equipment operation command from the terminal 1 only when the operator and the terminal 1 are detected in the range 6 by the sensor 3 and then notifies an equipment control signal output part of the operating contents. Thus, the equipment 2 is controlled based on the operating contents.</p> |
