| 摘要 |
A device (7) for transceiving alternating optical signals, comprises a primary receiver (14) adapted to receiving an alternating optical signal and generate a corresponding analog electrical signal, a signal detector (105), connected to the primary receiver and adapted to extract from said analog electrical signal an AC component with substantially zero average, and a bias detector (106), also connected to the primary receiver and adapted to extract from said analog electrical signal a continuous component indicative of the validity of the AC component. A method for transceiving alternating optical signals, that uses such device, comprises the steps of receiving the alternating optical signal and generate the corresponding analog electrical signal, extract from the analog electrical signal an AC component with substantially zero average, extract from the analog electrical signal a continuous component, and process the AC component and continuous component to verify, depending on the continuous component, whether the AC component contains useful information. Device and method are advantageously employed in transceiving checking signals of sensors comprised in a rotating part of a machine tool. |
