GAS SENSOR USE LIFE PREDICTION METHOD AND GAS DETECTION DEVICE

• Main Authors: ODAKA KENJI, HIRAO KEISUKE, MIYAGAWA NAOYUKI, TSUKAHARA TAKANORI
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2015
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a gas sensor use life prediction method which is capable of predicting an actual use life of a gas sensor to continuously maintain a normal operation state of a gas detection device, and to provide a gas detection device.SOLUTION: In the gas sensor use life prediction method, sensitivity values of a gas sensor which are acquired by calibration processing performed on the gas sensor with a standard gas are successively stored as calibration history data, and a temporal sensitivity attenuation characteristic curve peculiar to the gas sensor is acquired on the basis of the calibration history data, and a specific attenuation timing set to the gas sensor, at which the sensitivity value becomes a specific proportion to an initial sensitivity value, is obtained in accordance with the temporal sensitivity attenuation characteristic curve, and this specific attenuation timing is acquired as a use limit time of the gas sensor. The gas detection device includes a control unit having a function of executing the gas sensor use life prediction method. 【課題】ガスセンサについて、実際の使用寿命を予測してガス検知装置の正常動作状態を継続して維持することのできるガスセンサ使用寿命予測方法およびガス検知装置を提供すること。【解決手段】ガスセンサ使用寿命予測方法は、ガスセンサについて実施した標準ガスによる校正処理によって取得した当該ガスセンサの感度値を校正履歴データとして逐次記憶し、この校正履歴データに基づいて、当該ガスセンサに固有の経時的感度減衰特性曲線を取得し、この経時的感度減衰特性曲線によって、当該ガスセンサについて設定された、初期感度値に対する特定の割合の感度値となる特定減衰時点を求め、この特定減衰時点を当該ガスセンサについての使用限界時期として取得する。ガス検知装置は、上記ガスセンサ使用寿命予測方法を実行する機能を有する制御部を備えている。【選択図】図４