Dual swing gate control system

• US 7,557,525 B2
• Filed: 06/18/2007
• Issued: 07/07/2009
• Est. Priority Date: 06/18/2007
• Status: Active Grant

• Current Assignee: NICE North America LLC
• Original Assignee: GTO Inc. (Melrose Industries Plc)
• Inventors: Nguyen, Hung, Robert, Mayer
• Primary Examiner(s): Ro; Bentsu
• Assistant Examiner(s): DINH, THAI T
• Application Number:
  US11/820,070
• Publication Number:
  US 20080309275A1
• Time in Patent Office: 750 Days
• Field of Search: 318/38, 318/45, 318 67- 68, 318101-103, 318/135, 318264-266, 318/282, 318/286, 318466-469, 49192-193, 491/18, 493/60, 187315-317
• US Class Current: 318/135
• CPC Class Codes: E01F 13/06 by swinging into open position about a vertical or horizontal axis parallel to the road direction, i.e. swinging gates
• CPC Class Codes: E05F 5/12 specially for preventing the closing of a wing before another wing has been closed
• CPC Class Codes: E05Y 2400/41 for multiple motors
• CPC Class Codes: E05Y 2800/21 of identical elements, e.g. of identical compression springs

Abstract

A control system and method for ensuring proper closure of a dual swing gate. The control system employs position sensors for monitoring the position of each gate arm. A “differential position” is maintained between the arms during closing to ensure proper sequencing. The control system regulates the speed of the master arm and the slave arm to ensure that the differential position is maintained throughout the closure process.

Claims

1. A control system for a dual swing gate, said dual swing gate having a master arm, a slave arm, a first linear actuator for actuating said master arm, a second linear actuator for actuating said slave arm, a first motor operatively attached to said first linear actuator so that said first motor drives said first linear actuator, a second motor operatively attached to said second linear actuator so that said second motor drives said linear actuator, said master arm and said slave arm each configured to pivot between an open position and a closed position when actuated by said first linear actuator and said second linear actuator, said control system comprising:

a. a first position sensor configured to observe the position of said master arm;

b. a second position sensor configured to observe the position of said slave arm;

c. a controller configured to actuate said first linear actuator and said second linear actuator during a closure process, said controller further configured to receive position data from said first position sensor and said second position sensor, wherein said controller is configured to determine the differential position of said master arm and said slave arm during said closure process and maintain a designated differential position between said master arm and said slave arm during said closure process so that said slave arm reaches said closed position before said master arm.

2. The control system of claim 1, wherein said first position sensor observes said position of said master arm by sensing the revolutions of said first motor and wherein said second position sensor observes said position of said slave arm by sensing the revolutions of said second motor.

3. The control system of claim 1, wherein said controller maintains a differential position during the closure process by controlling the relative speed of said first motor and said second motor.

4. The control system of claim 1, wherein said controller employs a closed control loop process to maintain said differential position, wherein during said closed control loop process said controller determines whether said differential position is within a defined range.

5. The control system of claim 4, wherein if when employing said closed control loop process said controller determines said differential position is not within said defined range, said controller causes said second motor to operate faster than said first motor.

6. The control system of claim 1, wherein when initiating said closure process, said controller actuates said second linear actuator before actuating said first linear actuator, and said controller actuates said first linear actuator only after a designated time has lapsed from the time said second linear actuator was actuated.

7. The control system of claim 1, said controller further configured to control an opening process, wherein during said opening process said controller actuates said first linear actuator before actuating said second linear actuator.

8. A method for controlling the closure of a dual swing gate, said dual swing gate having a master arm, a slave arm, a first linear actuator for actuating said master arm, a second linear actuator for actuating said slave arm, a first motor operatively attached to said first linear actuator so that said first motor drives said first linear actuator, a second motor operatively attached to said second linear actuator so that said second motor drives said linear actuator, said master arm and said slave arm each configured to pivot between an open position and a closed position when actuated by said first linear actuator and said second linear actuator, said method comprising:

a. sensing the current position of said master arm;

b. sensing the current position of said slave arm;

c. determining the differential position between said master arm and said slave arm, said differential position representing the difference between the current position of said master arm relative to said closed position of said master arm and the current position of said slave arm relative to said closed position of said slave arm;

d. comparing the determined differential position with a designated differential position range; and

e. adjusting the speed of one of said first motor and said second motor if said determined differential position is outside said designated differential position range.

9. The method of claim 8, further comprising the step of providing a first position sensor configured to sense the position of said master arm and a second position sensor configured to sense the position of said slave arm.

10. The method of claim 9, wherein said first position sensor observes said position of said master arm by sensing the revolutions of said first motor and wherein said second position sensor observes said position of said slave arm by sensing the revolutions of said second motor.

11. The method of claim 8, further comprising the step of providing a controller, wherein said controller employs a closed control loop process to maintain said differential position, wherein during said closed control loop process said controller determines whether said differential position is within said designated differential range.

12. The method of claim 11, wherein when initiating said closure process, said controller actuates said second linear actuator before actuating said first linear actuator, and said controller actuates said first linear actuator only after a designated time has lapsed from the time said second linear actuator was actuated.

13. A control system for controlling the opening and closing of a gate system, said gate system having a slave gate element and a master gate element, wherein each of said gate elements is rotatable about an axis located at a pinned end of each of said gate elements and whereby rotation of said gate elements about said axes causes a free end of each gate element to define an arc of rotation, said control system comprising:

a. a first sensor, said first sensor capable of determining a position of said slave gate element along said slave gate element'"'"'s arc of rotation;

b. a second sensor, said second sensor capable of determining a position of said master gate element along said master gate element'"'"'s arc of rotation;

c. a controller in communication with said sensors and capable of comparing said slave gate element'"'"'s position along said slave gate element'"'"'s arc of rotation with said master gate element'"'"'s position along said master gate element'"'"'s arc of rotation to determine a differential position between said gate elements, said controller further capable of adjusting a rate of rotation of said slave gate element and a rate of rotation of said master gate element such that a preselected differential position between said gate elements is maintained.