Escalator safety gap detection device

The utility model relates to a safety clearance detection device for an escalator. The safety clearance detection device comprises a measurement host module, a clearance measurement module connected with the measurement host module, a displacement measurement marking module connected with the measurement host module and an operation terminal module connected with the measurement host module, the measurement host module measures the size of a gap on one side of the escalator and transmits data to the operation terminal module; the gap measurement module measures the size of a gap on the other side of the escalator and transmits data to the measurement host module; the displacement measurement marking module measures the running speed and displacement of the escalator and transmits data to the measurement host module; and the operation terminal module receives and stores the data and draws a time curve of the measured gap and speed displacement. According to the utility model, a non-contact gap measurement mode