Control system and control device for electric railroad car end door

Patent metadata

Field	Value
Publication number	US-11958508-B2
Application number	US-202017104447-A
Country	US
Kind code	B2
Filing date	Nov 25, 2020
Priority date	Jan 29, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A control system for an electrically-operated railroad car end door includes, an actuator, a processor, and a memory storing program instructions that cause the processor to instruct the actuator to begin generating a braking force applied to the railroad car end door in response to an opening of the railroad car end door, and determine whether the railroad car end door is being manually opened by a person based on information related to a state of the railroad car end door while the braking force is being generated.

First claim

What is claimed is:

1. A control system for an electrically-operated railroad car end door comprising:
an actuator configured to apply a braking force to the railroad car end door;
an information obtaining device configure to measure information related to the railroad car end door;
a processor; and
a memory storing program instructions that cause the processor to
control the actuator to apply the braking force to the railroad car end door in response to detecting that the railroad car end door is moved in an opening direction based on the measured information, and
determine whether the railroad car end door is being manually opened by a person based on information related to a state of the railroad car end door while the braking force is being applied, the information related to the state of the railroad car end door being generated based on the measured information.

2. The control system as claimed in claim 1 ,
wherein the information related to the state of the railroad car end door is a displacement amount of the railroad car end door, and
wherein the processor determines that the railroad car end door is being manually opened by the person in a case where the displacement amount of the railroad car end door exceeds a predetermined value when a predetermined time period has elapsed while the braking force is being generated.

3. The control system as claimed in claim 1 ,
wherein the information related to the state of the railroad car end door is a deceleration amount of the railroad car end door in a predetermined time period while the braking force is being generated, and
wherein the processor determines that the railroad car end door is being manually opened by the person in a case where the deceleration amount of the railroad car end door is below a predetermined value.

4. The control system as claimed in claim 3 , wherein the predetermined time period starts when a displacement amount of the railroad car end door exceeds a predetermined value.

5. The control system as claimed in claim 3 , wherein the predetermined time period starts when a predetermined time period has elapsed from the opening of the railroad car end door.

6. The control system as claimed in claim 1 ,
wherein the program instructions further cause the processor to calculate an estimated value of an external force acting on the railroad car end door,
wherein the information related to the state of the railroad car end door is the estimated value of the external force, and
wherein the processor determines that the railroad car end door is being manually opened by the person in a case where the estimated value of the external force exceeds a predetermined value even after a predetermined time period has elapsed from when the generation of the braking force has started.

7. The control system as claimed in claim 6 , wherein the predetermined value related to the estimated value of the external force is greater than or equal to a value equivalent to a component force of gravity in a movement direction of the railroad car end door, the gravity acting on the railroad car end door when a car equipped with the railroad car end door stops at a maximum cant.

8. The control system as claimed in claim 6 , wherein the processor starts determining whether the railroad car end door is being manually opened by the person in response to a displacement amount of the railroad car end door exceeding a predetermined value or from when a predetermined time period has elapsed from the opening of the railroad car end door.

9. The control system as claimed in claim 1 ,
wherein the program instructions further cause the processor to calculate an estimated value of a force acting on the railroad car end door,
wherein the information related to the state of the railroad car end door is a displacement amount of the railroad car end door, a deceleration amount of the railroad car end door, and the estimated value of the force, and
wherein the processor determines that the railroad car end door is being manually opened by the person in a case where at least two of a first condition, a second condition, and a third condition are satisfied, the first condition being that the displacement amount of the railroad car end door exceeds a predetermined value when a predetermined time period has elapsed while the braking force is being generated, the second condition being that the deceleration amount of the railroad car end door is below a predetermined value when a predetermined time period has elapsed while the braking force is being generated, and the third condition being that the estimated value of the force exceeds a predetermined value even after a predetermined time period has elapsed from when the generation of the braking force has started.

10. The control system as claimed in claim 9 , wherein the processor determines that the railroad car end door is being manually opened by the person in the following cases: the first condition and the second condition are sequentially satisfied, the second condition and the third condition are sequentially satisfied, the first condition and the third condition are sequentially satisfied, or the first condition, the second condition, and the third condition are sequentially satisfied.

11. The control system as claimed in claim 1 , wherein the processor switches a setting value used for determining whether the railroad car end door is being manually opened by the person, depending on whether a car equipped with the railroad car end door is traveling or whether the car equipped with the railroad car end door is stopped.

12. The control system as claimed in claim 1 , wherein the processor determines that the railroad car end door is being opened by a non-human external force in a case where the processor does not determine that the railroad car end door is being manually opened by the person.

13. The control system as claimed in claim 1 , wherein the actuator opens the railroad car end door in a case where the processor determines that the railroad car end door is being manually opened by the person.

14. The control system as claimed in claim 1 , wherein the actuator closes the railroad car end door when the processor determines that the railroad car end door is being opened by a non-human external force.

15. The control system as claimed in claim 1 , wherein the information related to the state of the railroad car end door is at least one of a displacement amount of the railroad car end door, a deceleration amount of the railroad car end door, or an estimated value of an external force acting on the railroad car end door.

16. The control system as claimed in claim 1 , wherein the actuator is configured to convert electrical energy to mechanical energy to apply the braking force to the railroad car end door and the processor is configured to control the electrical energy supplied to the actuator.

17. The control system as claimed in claim 16 , wherein the actuator is a motor and the information obtaining device is a sensor configured to detect a position of the railroad car end door.

18. A control device for an electrically-operated railroad car end door comprising:
a processor; and
a memory storing program instructions that cause the processor to
control to apply the braking force to the railroad car end door in response to detecting that the railroad car end door is moved in an opening direction based on information related to the railroad car end door, the information related to the railroad car end door being measured by an information obtaining device; and
det

Assignees

• Fuji Electric Co Ltd

Inventors

• Ozaki Satoru

Classifications

• B61D19/026 Primary

  Safety devices for preventing passengers from being injured by movements of doors or variations in air pressure (safety devices in passenger lifts for preventing trapping of passengers between closing doors B66B13/26; acting on power-operated mechanisms for wings E05F15/00) · CPC title

• B61D19/008

  both swinging and sliding · CPC title

• B61D19/02 Primary

  for carriages (B61D19/003 takes precedence) · CPC title