Entry and exit confirmation system and method

A computer readable medium having computer readable program for operating on a computer for confirming entry and/or exit state of at least one mobile object relative to an entrance of an underground passageway by utilizing Radio Frequency Identification (RFID) technology, wherein at least one RFID tag is physically attached to the mobile object and at least a first RFID reader and a second RFID reader, each having a monitoring range and being in communication with the RFID tag, are disposed at the entrance and an relatively inner position of the passageway respectively, said method comprising the steps of:

• generating a first entering-state data if the RFID tag enters the monitoring range of the first RFID reader and a first exiting-state data if the RFID tag exits the monitoring range of the first RFID reader;
• generating a second entering-state data if the RFID tag enters the monitoring range of the second RFID reader and a second exiting-state data if the RFID tag exits the monitoring range of the second RFID reader;
• and
• processing the first entering-state and exiting-state data and the second entering-state and exiting-state data to generate an output data indicating the entry and/or exit state of the mobile object relative to the entrance of the passageway.

A system for confirming entry and/or exit state of a mobile object relative to an entrance of an underground passageway by utilizing Radio Frequency Identification (RFID) technology, wherein at least one RFID tag is physically attached to the mobile object and at least a first RFID reader and a second RFID reader, each having a monitoring range and being in communication with the RFID tag, are disposed at the entrance and an relatively inner position of the passageway respectively, comprising:

• a first state data generating component for generating a first entering-state data if the RFID tag enters the monitoring range of the first RFID reader and a first exiting-state data if the RFID tag exits the monitoring range of the first RFID reader;
• a second state data generating component for generating a second entering-state data if the RFID tag enters the monitoring range of the second RFID reader and a second exiting-state data if the RFID tag exits the monitoring range of the second RFID reader;
• and
• a data processing component for processing the first entering-state and exiting-state data and the second entering-state and exiting-state data to generate an output data indicating the entry and/or exit state of the mobile object relative to the entrance of the passageway.