Abstract
The author has previously proposed a new multi-point optical sensing system (MPOSS) based on remote optical power supply technology. This system enables us to drive variety of electric sensors and collect their sensing data even if there is no power equipment at their installation site. The system adopts optical pass control technique using optical switches to collect the sensing data from a lot of node by using only two optical fibers. In the previous research, it was demonstrated the prototype MPOSS with wired and wireless sensors had good performance. In this report, results in improving an optical node and evaluating its temperature resistance were shown. A new method using 2-by-2 and 1-by-2 optical switches to reduce optical devices was proposed and successfully demonstrated. Furthermore, it was confirmed an optical node can normally operate in wide temperature range of -25 to 50 degrees, and it shows the node can be used in outdoor environments.
