| 摘要 |
PURPOSE:To be released from complicated management by transmitting a homing confirmation signal when a slave unit enters a master unit zone, transmitting an outgoing confirmation signal when the slave unit leaves the zone and letting in-house equipments perform prescribed operations by the confirmation signals. CONSTITUTION:Every time when the slave unit 113 receives a return packet, a master unit 102 pulls out a caller identification code, transfers it to a comparison discrimination part 104 and when the codes coincide, inputs an activating signal to a timer part 105. A start detection part 106 detects that the output of the timer part 105 changes from '0' to a positive number and the output of a homing confirmation part 108 is turned to the positive for a certain period of time. That is, the homing confirmation signal is transmitted and also an at-home informing part 109 is set to retain an at-home state. On the other hand, a time out detection part 107 detects that the output of the timer part 105 changes from the positive number to '0' and an out informing part 110 is turned to the positive for a certain period of time. That is, an absence/outgoing confirmation signal is transmitted and the informing part 109 is defined as an absence state simultaneously. Then, an equipment control part 111 appropriately performs the various kinds of operations required for the in-house equipments. |
