SYNCHRONIZATION FOR A SYSTEM COMPRISING A PLURALITY OF READING DEVICES

摘要

A system comprising multiple reading devices which are arranged for wireless readout of at least two different types of transponders, each reading device being arranged for generating, in use, a time-repetitive electromagnetic interrogation transmission pulse. The pulse duration has a predetermined fir st value (.DELTA.T) and the quiescent period between two successive interrogati on transmission pulses has a predetermined second value .DELTA.R when the readi ng device does not receive a response. The first value of the reading device is prolonged when the reading device receives a response from at least one transponder of a first type, and the second value of the reading device is prolonged when the reading device, in between the transmission of two interrogation transmission pulses, receives a response from at least one transponder of a second type. The reading devices are connected with each other through a synchronization connection.