Method and system for brake testing an elevator car

Patent metadata

Field	Value
Publication number	US-11034545-B2
Application number	US-201815935846-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Mar 26, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A method of testing elevator car braking distance includes verifying that an elevator car is empty. The method also includes initiating a test procedure. The method further includes triggering a safety actuation device to actuate at least one safety brake to stop an elevator car. The method yet further includes recording braking data during a braking period. The method also includes recording braking data with at least one piece of elevator car equipment. The method further includes generating a braking data report that includes at least one of braking distance and braking deceleration of the elevator car.

First claim

What is claimed is:

1. A method of testing elevator car braking comprising:
verifying that an elevator car is empty;
initiating a test procedure;
triggering a safety actuation device to actuate at least one safety brake to stop the elevator car, wherein the safety actuation device and the at least one safety brake are mounted to the elevator car;
recording braking data during a braking period in which the at least one safety brake stops the elevator car;
recording second braking data with at least one piece of elevator car equipment; and
generating a braking data report that includes at least one of braking distance and braking deceleration of the elevator car;
wherein the safety actuation device is an electronic device for monitoring at least one of velocity and acceleration;
wherein the at least one piece of elevator car equipment comprises a camera mounted to the elevator car, the camera taking a picture of brake marks left on a guide rail by the at least one safety brake.

2. The method of claim 1 , wherein the safety actuation device comprises an electronic safety actuator.

3. The method of claim 2 , wherein the braking data comprises at least one of acceleration data and absolute velocity of the elevator car when the at least one safety brake is actuated.

4. The method of claim 1 , further comprising transferring the braking data to an elevator system processing device, wherein the elevator system processing device is at least one of an elevator system controller, a cloud server, and a service tool.

5. The method of claim 4 , wherein the at least one piece of elevator car equipment is in operative communication with an elevator car interface board mounted to the elevator car, the elevator car interface board in operative communication with the elevator system processing device.

6. The method of claim 1 , wherein the test procedure is initiated by an individual located proximate to an elevator system processing device, the elevator system processing device comprising at least one of an elevator system controller, a cloud server, and any other computing device.

7. The method of claim 6 , wherein the individual interacts with the elevator system controller manually with a user interface.

8. The method of claim 6 , wherein the individual interacts with the elevator system controller with a mobile device in wireless communication with the elevator system controller.

9. A method of testing elevator car braking comprising:
verifying that an elevator car is empty;
initiating a test procedure;
triggering a safety actuation device to actuate at least one safety brake to stop the elevator car;
recording braking data during a braking period;
recording second braking data with at least one piece of elevator car equipment;
generating a braking data report that includes at least one of braking distance and braking deceleration of the elevator car;
calculating the effect of a counterweight during the braking process to determine actual free fall braking data of the elevator car.

10. A method of automated testing of elevator car braking comprising:
initiating a test procedure with a device;
triggering an electronic safety actuator to actuate at least one safety brake to stop an elevator car;
recording braking data with at least one piece of elevator car equipment; and
generating a braking data report that includes at least one of a braking distance and braking deceleration of the elevator car;
wherein the at least one piece of elevator car equipment comprises a camera mounted to the elevator car, the camera taking a picture of brake marks left on a guide rail by the at least one safety brake.

11. The method of claim 10 , wherein the device that initiates the test procedure comprises at least one of an elevator system controller, a remote device, a cloud server, and any other computing device.

12. The method of claim 10 , further comprising recording second braking data during a braking period with the electronic safety actuator.

13. The method of claim 12 , wherein the second braking data recorded with the electronic safety actuator comprises at least one of acceleration data and absolute velocity of the elevator car when the safety brake(s) is actuated.

14. An elevator brake testing system comprising:
an electronic safety actuator coupled to an elevator car for actuating a safety brake, the electronic safety actuator detecting braking data during a brake test;
a controller in operative communication with the electronic safety actuator for transferring the braking data;
a remote device;
a camera operatively coupled to the elevator car, the camera positioned to capture an image of brake marks on a guide rail left by the safety brake; and
a network wirelessly connecting the camera to the controller, and the controller to the remote device, the remote device remotely initiating an automated test of the elevator brake testing system by triggering the electronic safety actuator, the controller communicating an elevator car braking distance to the remote device.

Assignees

• Otis Elevator Co

Inventors

• Sudi Sandeep

Classifications

• B66B1/3461

  between the elevator control system and remote or mobile stations · CPC title

• B66B5/0093 Primary

  Testing of safety devices · CPC title

• G01L5/286

  Measuring deceleration · CPC title

• G01L5/284

  Measuring braking-time or braking distance · CPC title

• B66B5/0031

  for safety reasons · CPC title