Elevator door safety control

Patent metadata

Field	Value
Publication number	US-11242226-B2
Application number	US-201815978249-A
Country	US
Kind code	B2
Filing date	May 14, 2018
Priority date	May 14, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

Embodiments include techniques for operating an elevator safety control system and method. The techniques include charging one or more portions of an elevator system, the elevator system includes an elevator door and elevator frame, and monitoring a charge on the one or more portions of the elevator system. In addition, the techniques include detecting a change in the charge on the one or more portions of the elevator system, and responsive to the detection, controlling an operation of the elevator door.

First claim

What is claimed is:

1. A method for operating a sensing device of an elevator safety control system, the method comprising:
charging one or more portions of an elevator system, the elevator system comprises an elevator door and elevator frame;
monitoring a charge on the one or more portions of the elevator system;
detecting, by the sensing device, a change in the charge on the one or more portions of the elevator system that have been charged, wherein detecting the change in the charge comprises detecting an electric current flowing through the elevator door or the elevator frame; and
responsive to the detection, controlling an operation of the elevator door.

2. The method of claim 1 , wherein the operation of the elevator door is reversed responsive to the detection.

3. The method of claim 1 , wherein the operation of the elevator door is at stopped responsive to the detection.

4. The method of claim 1 , wherein operation of the elevator door resumes after a configurable delay and detecting normal operating current in the elevator.

5. The method of claim 4 , wherein the operation of the elevator door reduces a speed of the elevator door responsive to the detection.

6. The method of claim 4 , wherein the operation of the elevator door reduces a speed of the elevator door in the reverse direction responsive to the detection.

7. The method of claim 1 , wherein at least one of the elevator door or the elevator frame is composed of metal capable of being charged by the energy source.

8. The method of claim 1 , further comprises operating the elevator door according to a first operation upon the detection in a first location based on operating in a first direction and operating the elevator door according to a second operation upon the detection in a second location, wherein the first operation is different than the second operation and the first location is different than the second location.

9. An elevator control safety system, the system comprising:
one or more elevator cars of an elevator system, the one or more elevator cars each include an elevator door and frame;
an energy source coupled to the one or more elevator cars to charge the elevator door or the elevator frame;
a current sensor electrically coupled to the energy source and the one or more elevator cars to perform a detection, wherein the detection comprises detecting an electric current flowing through the elevator door or the elevator frame; and
an elevator controller operably coupled to the current sensor and the elevator system, the elevator controller configured to control the elevator door responsive to a signal received from the current sensor.

10. The system of claim 9 , wherein the operation of the elevator door is reversed responsive to the detection.

11. The system of claim 9 , wherein the operation of the elevator door is stopped responsive to the detection.

12. The system of claim 9 , wherein operation of the elevator door resumes after a configurable delay and detecting normal operating current in the elevator.

13. The system of claim 12 , wherein the operation of the elevator door reduces a speed of the elevator door responsive to the detection.

14. The system of claim 12 , wherein the operation of the elevator door reduces a speed of the elevator door in the reverse direction responsive to the detection.

15. The system of claim 9 , wherein at least one of the elevator door or the elevator frame is composed of metal capable of being charged by the energy source.

16. The system of claim 9 , further comprises operating the elevator door according to a first operation upon the detection in a first location based on operating in a first direction and operating the elevator door according to a second operation upon the detection in a second location, wherein the first operation is different than the second operation and the first location is different than the second location.

Assignees

• Otis Elevator Co

Inventors

• Sun Fanping
• Mantese Joseph V
• Schmidt Walter Thomas

Classifications

• B66B13/146

  method or algorithm for controlling doors · CPC title

• B66B13/26 Primary

  between closing doors · CPC title

• B66B13/24 Primary

  Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers · CPC title

• B66B5/0006

  Monitoring devices or performance analysers (B66B5/02 takes precedence) · CPC title