METHOD AND DEVICE FOR ESTIMATING THICKNESS OF DEPOSIT ON INNER WALL SURFACE OF EXHAUST GAS PASSAGE

To estimate a thickness of deposits with high accurate, to extend a continuous operation time and increase an availability ratio.SOLUTION: The present invention is configured to, when estimating a thickness t of a deposit 8 adhering to the inner wall surface of an exhaust gas passage 14, measure the radioactivity of the deposit 8 from the outside of the exhaust gas passage 14 using a radioactivity sensor 30; three-dimensionally measure the shape of the deposit on the inner wall surface of the exhaust gas passage 14, using a three-dimensional optical sensor 32 inserted in the exhaust gas passage 14; accumulate adhesion thickness estimation data obtained from the measurement of the radioactivity, adhesion thickness measurement data obtained from the three-dimensional measurement, and operation data, to learn the deposit thickness t; and predict the deposit thickness t, using the learning result obtained from the learning.SELECTED DRAWING: Figure 7 【課題】付着物厚みを高精度で推定して連続操業時間を延ばし、稼働率を上げる。【解決手段】排ガス通路１４の内壁面に付着した付着物８の厚みｔを推定する際に、排ガス通路１４の外側から放射能センサ３０を用いて付着物８の放射能を計測し、排ガス通路１４の中に挿入された３次元光センサ３２を用いて、排ガス通路１４の内壁面の付着物形状を３次元計測し、前記放射能の計測から得られた付着物厚み推定データ、前記３次元計測から得られた付着物厚み測定データ、及び、操業データを蓄積して付着物厚みｔを学習し、前記学習から得られた学習結果を用いて付着物厚みｔを予測する。【選択図】図７