System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof

A moving handrail monitoring method of a passenger conveying device, comprising:

• a data frame acquisition step:
• acquiring a data frame based on an imaging sensor and/or a depth sensing sensor that sense/senses at least part of a moving handrail of the passenger conveying device;
• a target object recognition step:
• recognizing, based on a sensed movement and/or position and/or color and/or shape, a moving handrail portion that serves as a target object from the data frame;
• an object feature extraction step:
• extracting a tension degree feature of the moving handrail portion that serves as the target object;
• and
• a judgment step:
• comparing the extracted tension degree feature with a system preset interval and judging whether a current tension degree of the moving handrail is normal.

A moving handrail monitoring system for a passenger conveying device, comprising:

• an imaging sensor and/or a depth sensing sensor configured to sense at least part of a moving handrail of the passenger conveying device to acquire a data frame;
• a processing device configured to analyze and process the data frame to monitor whether a tension degree of the moving handrail is in a normal state, wherein, the processing device is configured to comprise:
• a target object recognition module configured to recognize, based on a sensed movement and/or position and/or color and/or shape, a moving handrail portion that serves as a target object from the data frame;
• a reference background that comprises a normal zone and an abnormal zone;
• and
• a judgment module configured to judge whether a current tension degree of the moving handrail is normal based on whether the moving handrail portion falls in the normal zone and/or abnormal zone of the reference background.