Failure diagnosis system and failure diagnosis method for optical axis sensor installed in elevator door

摘要

PROBLEM TO BE SOLVED: To provide a failure diagnosis system and a failure diagnosis method capable of quickly and accurately recognizing a failure of an optical axis sensor installed at an elevator door. According to an embodiment, a failure diagnosis system for an optical axis sensor installed in an elevator door includes an optical axis sensor that senses the presence or absence of a foreign object by sensing between the elevator doors in the left-right direction, and sensing in the vertical direction. And an up / down direction door sensor that determines the presence or absence of foreign matter, an imaging determination door sensor that analyzes imaging information obtained by imaging between the doors and determines the presence or absence of foreign matter, and a failure diagnosis unit. The failure diagnosis unit diagnoses that there is a possibility that the optical axis sensor is defective when only the determination result of the presence or absence of foreign matter between the doors by the optical axis sensor is different from the determination results of the other two sensors. [Selection] Figure 1