INSPECTION METHOD FOR PILLAR-SHAPED HONEYCOMB FILTER

• Main Authors: ISHII YUTAKA, KANEMITSU TAKAAKI, TERAHAI TAKAFUMI, FUKAYA KOSEI, EBISUTANI KENJI, SATO SACHIHIRO, KURAHASHI RYOTA, KAMIYAMA TAKAKAZU, WATANABE YUJI, IWADE MASANARI, MURAI MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To provide an inspection method for a pillar-shaped honeycomb filter, which can determine the quality of the filter as a whole.SOLUTION: An inspection method for a pillar-shaped honeycomb filter having a honeycomb-shaped first end face and a honeycomb-shaped second end face includes the steps of: allowing gas containing fine particles to flow into the first end face; imaging the entire second end face covered with sheet-like light using a camera while the gas that has flowed into the first end face flows out of the second end face through the filter, and generating an image of the entire second end face covered with the sheet-like light; selecting an inspection area of the second end face from the image of the entire second end face covered with the sheet-like light, and measuring information on a total sum of luminance of each pixel in the inspection area; and determining the quality of the filter on the basis of at least information on the concentration of the fine particles in the gas before the gas flows into the first end face and the information on the total sum of luminance.SELECTED DRAWING: Figure 3 【課題】フィルタ全体としての品質を判定可能な柱状ハニカムフィルタの検査方法を提供する。【解決手段】ハニカム状第一底面及びハニカム状第二底面を有する柱状ハニカムフィルタの検査方法であって、微粒子を含有する気体を前記第一底面に流入させる工程と、前記第一底面に流入した前記気体が前記フィルタを通過して前記第二底面から流出している状態で、カメラを用いて、シート状の光に覆われた前記第二底面全体を撮像し、前記シート状の光に覆われた前記第二底面全体の画像を生成する工程と、前記シート状の光に覆われた前記第二底面全体の画像から前記第二底面の検査エリアを選択し、検査エリアにおける各画素の輝度の総和に関する情報を測定する工程と、前記気体が前記第一底面に流入する前の前記気体中の微粒子濃度に関係する情報と、前記輝度の総和に関する情報に少なくとも基づいて前記フィルタの品質を判定する工程と、を含む方法。【選択図】図３