| 摘要 |
ESCALATOR OPERATION SOUNDS ARE COLLECTED BY A REMOTE SOUND-COLLECTING DEVICE (15) OR FIXED SOUND-COLLECTING DEVICES (17, 18), AND STORED IN A DATA COLLECTING DEVICE (21) OF A DIAGNOSIS DEVICE (20). A PROCESSING DEVICE (2) EXTRACTS ONLY ABNORMAL SOUND COMPONENTS OF THE ESCALATOR OPERATION SOUND BY CALCULATION OF A DIFFERENCE BETWEEN REFERENCE DATA AND THE SOUND DATA STORED IN THE DATA COLLECTING DEVICE (21). THE PROCESSING DEVICE (22) DETERMINES AN OCCURRENCE OF AN ANOMALY BASED ON WHETHER A MAXIMUM PEAK (P) OF THE ABNORMAL SOUND COMPONENTS IS HIGHER THAN A PREDETERMINED THRESHOLD VALUE (SH1). WHEN DETERMINED THAT THE ANOMALY HAS OCCURRED, THE PROCESSING DEVICE (22) INVESTIGATES A CORRELATION BETWEEN A FREQUENCY ANALYSIS RESULT ON DATA AROUND THE MAXIMUM PEAK OF THE ABNORMAL SOUND COMPONENTS AND ABNORMAL SOUND FREQUENCY PATTERNS PRE-STORED BY CAUSES OF ANOMALIES, AND ESTIMATES THE CAUSE OF THE ANOMALY BASED ON THE INVESTIGATION. |
