Escalator braking system and escalator braking control method

Patent metadata

Field	Value
Publication number	US-10294081-B2
Application number	US-201715491215-A
Country	US
Kind code	B2
Filing date	Apr 19, 2017
Priority date	Apr 21, 2016
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

The present invention provides an escalator braking system and an escalator braking control method, belonging to the field of escalator braking control technology. In the escalator braking system and the escalator braking control method according to the present invention, a braking mode is determined based on the classification of failure information in combination with the corresponding image information, and a braking device is controlled based on the braking mode, so that the braking is more intelligent, scientific and accurate, the occurrence of security problems caused by the failure can be effectively prevented, and the probability of accident is reduced.

First claim

What is claimed is:

1. An escalator braking system, comprising a braking device and a failure monitoring device, further comprising:
a failure classification module for classifying failure information monitored by the failure monitoring device at least according to braking distance requirements;
an escalator operation image acquiring and processing device for performing real-time image acquisition of the operation of the escalator and performing processing to obtain image information corresponding to the occurrence of the failure; and
a braking distance control module for determining a braking mode based on the classification of the failure information in combination with the corresponding image information and controlling the braking device based on the braking mode;
wherein the braking distance control module is further configured to determine a brake mode based on the image information obtained by performing processing when the failure information is not monitored by the failure monitoring device.

2. The escalator braking system according to claim 1 , wherein the braking mode comprises:
a short braking distance fast braking mode,
a medium braking distance normal braking mode, and
a long braking distance slow braking mode, and/or
a long braking distance deceleration-to-zero stopping mode.

3. An escalator braking system, comprising a braking device and a failure monitoring device, further comprising:
a failure classification module for classifying failure information monitored by the failure monitoring device at least according to braking distance requirements;
an escalator operation image acquiring and processing device for performing real-time image acquisition of the operation of the escalator and performing processing to obtain image information corresponding to the occurrence of the failure; and
a braking distance control module for determining a braking mode based on the classification of the failure information in combination with the corresponding image information and controlling the braking device based on the braking mode;
wherein the classification of the failure information according to the braking distance requirements comprises:
a short distance fast braking safety failure,
a long distance slow braking safety failure,
a medium distance normal braking non-safety failure, and
a long distance slow braking non-safety failure.

4. The escalator braking system according to claim 1 , wherein the failure monitoring device comprises:
a safety chain monitoring module for monitoring a hardware trigger type failure; and
a first logic failure monitoring module for monitoring a logical failure of the operation of the escalator.

5. An escalator braking system, comprising a braking device and a failure monitoring device, further comprising:
a failure classification module for classifying failure information monitored by the failure monitoring device at least according to braking distance requirements;
an escalator operation image acquiring and processing device for performing real-time image acquisition of the operation of the escalator and performing processing to obtain image information corresponding to the occurrence of the failure; and
a braking distance control module for determining a braking mode based on the classification of the failure information in combination with the corresponding image information and controlling the braking device based on the braking mode;
wherein the failure monitoring device comprises:
a safety chain monitoring module for monitoring a hardware trigger type failure; and
a first logic failure monitoring module for monitoring a logical failure of the operation of the escalator;
wherein the failure monitoring device further comprises:
a second logic failure monitoring module for monitoring an internal logic failure of the escalator braking system.

6. An escalator braking system, comprising a braking device and a failure monitoring device, further comprising:
a failure classification module for classifying failure information monitored by the failure monitoring device at least according to braking distance requirements;
an escalator operation image acquiring and processing device for performing real-time image acquisition of the operation of the escalator and performing processing to obtain image information corresponding to the occurrence of the failure; and
a braking distance control module for determining a braking mode based on the classification of the failure information in combination with the corresponding image information and controlling the braking device based on the braking mode
wherein the escalator operation image acquiring and processing device comprises an image sensor and an image processing system, wherein the image information obtained by performing processing by the image processing system comprises whether there is a passenger on the escalator, whether the passenger has a dangerous behavior, and/or whether there is a passenger at the exit or entrance of the escalator.

7. The escalator braking system according to claim 6 , wherein the braking distance control module is configured to determine that the braking mode is the short braking distance fast braking mode according to the image information that there is a passenger on the escalator and the passenger has a dangerous behavior.

8. An escalator braking system, comprising a braking device and a failure monitoring device, further comprising:
a failure classification module for classifying failure information monitored by the failure monitoring device at least according to braking distance requirements;
an escalator operation image acquiring and processing device for performing real-time image acquisition of the operation of the escalator and performing processing to obtain image information corresponding to the occurrence of the failure; and
a braking distance control module for determining a braking mode based on the classification of the failure information in combination with the corresponding image information and controlling the braking device based on the braking mode;
wherein the braking device is an electrically controlled braking device, comprising:
a variable frequency driver for controlling the operation of an electric motor for driving the escalator; and
a brake lining for mechanically braking a rotor of the electric motor;
wherein the variable frequency driver is configured to control the braking distance based on the determined braking mode;
wherein the braking process corresponding to each braking mode comprises:
a first braking stage corresponding to controlling a rotational speed of the electric motor by the variable frequency driver to decrease from a normal operating speed to a predetermined speed; and
a second braking stage corresponding to performing braking by the brake lining to brake from the predetermined speed to a speed of zero.

9. The escalator braking system according to claim 8 , wherein the electrically controlled braking device further comprises a main contactor provided between the variable frequency drive controller and the electric motor, wherein, when the rotational speed of the electric motor is lowered to the predetermined speed, the main contactor controls a switch between the variable frequency drive controller and the electric motor to be turned off and at the same time controls the brake lining to perform a braking action on the rotor of the electric motor, thereby achieving a transition from the first braking stage to the second braking stage.

10. The escalator braking system according to claim 1 , wherein the escalator operation image acquiring and processing device comprises an image sensor and an image processing system.

Assignees

• Otis Elevator Co

Inventors

• Wang Longwen

Classifications

• B66B29/005 Primary

  Applications of security monitors · CPC title

• B66B23/00

  Component parts of escalators or moving walkways · CPC title

• B66B25/006 Primary

  Monitoring for maintenance or repair (for security reasons B66B29/005) · CPC title

• B66B29/00

  Safety devices of escalators or moving walkways (walkways of variable speed type B66B21/12; handrails of variable speed type B66B23/26) · CPC title

• B66B25/00 Primary

  Control of escalators or moving walkways (walkways of variable speed type B66B21/12; handrails of variable speed type B66B23/26; of general application G05) · CPC title