| 摘要 |
PROBLEM TO BE SOLVED: To identify each item in a large scale group efficiently by including digital control logic, executing the operation in response to a command signal when a detected signal generated in response to a direction signal has a prescribed value. SOLUTION: A digital control logic 110 seeks a proper pulse sequence to decide a correct action. A radio-frequency sub-system 112 receives information from a radio-frequency identification(RFID) base station 120 and hands it to the digital control logic 110. The digital control logic 110 controls the radio- frequency sub-system 112, in response to an optical pulse sequence and its information. Similarly, when the radio frequency sub-system 112 returns information to the RFID base station 120, a tag 104 is made available, and only when a pulse light source 102 provides a correct pulse light source having a designated pattern and a wavelength, does the tag 104 return information to the RFID base station 120. Upon the receipt of a coded optical pulse sequence, the tag 104 executes a usual tag function. |
