PROBLEM TO BE SOLVED: To provide a communication system installed without processing an installation portion.SOLUTION: In the communication system, communication units 30A and 30B are fixed, by suction cups 32, to positions opposing each other across a monitoring window 4 (not shown in Fig.2). Each screw N of the migration mechanism 40 of the communication unit 30A is loosened, and while watching the deflection of the needle of an ammeter 33, an X-axis stage 41 and a Y-axis stage 42 are moved in X-axis and Y-axis directions to perform alignment of changing the position of a light-emitting element 35. While monitoring the current value flowing through a light-receiving element 36 by the ammeter, a variable resistor is adjusted to change the current value flowing through the light-emitting element 35 to adjust the intensity of light. Then, the intensity of the light from the light-emitting element 35 is adjusted so as to be within the measurable range of the light-receiving element 36.COPYRIGHT: (C)2012,JPO&INPIT【課題】設置部位への加工処理を施さずに設置することが可能となる通信システムを提供する。【解決手段】監視窓4(図2には図示せず)を挟んで対向する位置に通信ユニット30A,30Bを吸着盤32によって固定する。通信ユニット30Aの移動機構40の各ねじNを緩め、電流計33の針の振れを見ながら、X軸ステージ41およびY軸ステージ42をX軸・Y軸方向に移動させて発光素子35の位置を変更する位置合わせを行う。受光素子36を流れる電流値を電流計で監視しながら、可変抵抗を調整して発光素子35に流れる電流値を変更して光の強度を調整する。そして、発光素子35から光の強度が、受光素子36の測定可能範囲内に入るように調整する。【選択図】図2
