| 摘要 |
The present invention provides an ingress-egress monitoring system comprising transmitting antennas 1 disposed respectively at a plurality of ingress-egress gates, tags 2 to be attached to respective persons to be checked for egress and each adapted to transmit an identification signal in response to radio waves received from the antenna 1, receivers 3 disposed respectively at the ingress-egress gates for receiving the identification signal from the tag and each operable to output a monitoring signal containing an ID code contained in the identification signal and the number of the gate of its own, and a monitor 5 connected to the receivers 3 for displaying the ID code and the gate number based on the monitoring signal output from the receiver 3. The tags 2 transmit the respective identification signals in cycles different one another.
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