Falling detection device and passenger conveyor

Abstract

A falling detection device and a passenger conveyor can reliably detect falling states by setting the optimum height of a laser scanning sensor within the range of 8 to 11cm. The falling detection device comprises a scanning type range sensor, wherein the scanning type range sensor is arranged near a passageway of a ladder layer station, and can emit laser beams in a plane shape within the scanned area comprising a floor plate used for coming in and going out and a passageway used for accessing, the scanning type range sensor is arranged at the height of 8 to 11cm apart from the ground, and can store the measured distances for various angles, and for data in the preset detection area, the scanning type range sensor calculates a standard deviation for changes of the distance of the data with the time and a standard deviation of the standard deviation, in the case that the standard deviation is less than a threshold, and the standard deviation of the standard deviation is also less than the threshold, a surface size of the object in the area is calculated, and when the state that the surface size of the object is more than the threshold continues for a predetermined time, the falling state is determined.

Description

technical field [0001] The present invention relates to a fall detection device and passenger conveyors such as escalators and moving walks. Background technique [0002] In a passenger conveyor, when a user (passenger) gets off the running passenger conveyor at an entrance, there is a possibility of a mistake and a fall. If a user accidentally falls at an entrance or exit, the fall of the user cannot be detected normally, and it is desired to improve this situation. [0003] A safety device for a passenger conveyor has been proposed in the past (for example, refer to Patent Document 1). The movement of the user on the plane coordinates, when the moving speed of the user measured by the laser scanning sensor (the information on the staying state of the entrance and exit department) is lower than a predetermined value, the speech synthesis device is used to make a reminder broadcast, and at the same time the user is staying Or when it is crowded for a long time, control the...

AI Technical Summary

Problems solved by technology

[0006] In conventional safety devices for passenger conveyors, the center point is captured from the outline data (shape) of the detected object (user) captured by the laser scanning sensor, and the retention is measured based on the number of center points and the moving speed. and the overcrowded state, so when the user (passenger) falls, for example, even if the head is located near the entrance and exit, the foot is located outside the scanning area. In this state, the center point cannot be accurately calculated. There are cases where a fall cannot be detected

Also, even if the center point is calculated, the center is located outside the entrance and exit, so there may be cases where it is judged that there is no problem and the alarm is not sounded.

In addition, when the user who fell down moved his hand and made small movements in a hurry, the center point was captured on the hand part, and the hand was moving moderately, so it was mistakenly recognized as a crowded state and determined as an appropriate traffic state, May fail to detect falls

In addition, if the laser is projected far away, there is a possibility of erroneous operation due to retention far away from the passenger conveyor

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