Control system for garage door

• US 20100052846A1
• Filed: 08/28/2009
• Published: 03/04/2010
• Est. Priority Date: 09/01/2008
• Status: Abandoned Application

• Current Assignee: Powell Industries Incorporated
• Original Assignee: Powell Industries Incorporated
• Inventors: Wang, Jianhua, Luo, Zijian
• Application Number:
  US12/550,345
• Publication Number:
  US 20100052846A1
• Time in Patent Office: Days
• US Class Current: 340/5.510
• CPC Class Codes: E05F 15/00 Power-operated mechanisms for wings motor-operated accessories in locks for completing closing or initiating opening of a wing E05B17/00
• CPC Class Codes: E05F 15/40 Safety devices, e.g. detection of obstructions or end positions
• CPC Class Codes: E05Y 2400/80 User interfaces
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2009/00928 for garage doors
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks

Abstract

A control system for garage door includes a motor, a controller controlling operation of the motor, and a keyboard for inputting an instruction into the controller. The keyboard includes a plurality of keys, a plurality of resistors, a divider resistor for sharing voltage, and a voltage signal output circuit. The resistors correspond to the keys. Each key is connected with one of the resistors in series to form a key mapping signal shunt. The key mapping signal shunts are connected in parallel to form a group of key mapping signal shunts. The divider resistor is connected with the group of key mapping signal shunts in series to form a series circuit. A driving voltage is applied on the series circuit. The voltage signal output circuit is for transmitting a voltage on the group of key mapping signal shunts to the controller.

Claims

1. A control system for a garage door, comprising:

a motor;

a controller controlling operation of said motor; and

a keyboard for inputting an instruction into said controller, comprising a plurality of keys, a plurality of resistors corresponding to said keys, wherein each key is connected with one of the resistors in series to form a key mapping signal shunt, and said key mapping signal shunts are connected in parallel to form a group of key mapping signal shunts, a divider resistor connected with said group of key mapping signal shunts in series to form a series circuit, wherein a driving voltage is applied on said series circuit, and a voltage signal output circuit for transmitting a voltage on said group of key mapping signal shunts to said controller.

2. The control system, as recited in claim 1, wherein said group of key mapping signal shunts has a first end connected with said divider resistor in series and a second end grounded, said divider resistor has a first end connected with said group of key mapping signal shunts and a second end connected and applied with a signal of the driving voltage, said voltage signal output circuit extends to said controller from a connection point between said group of key mapping signal shunts and said divider resistor.

3. The control system, as recited in claim 1, wherein said keyboard further comprises a key locking circuit, wherein said controller has a locking signal output terminal connected with said key locking circuit.

4. The control system, as recited in claim 2, wherein said keyboard further comprises a key locking circuit, wherein said controller has a locking signal output terminal connected with said key locking circuit.

5. The control system, as recited in claim 3, wherein said key locking circuit comprises:

a NPN transistor which has a collector, a grounded emitter and a base, wherein said collector and said emitter are connected with said group of key mapping signal shunts in parallel;

a current limit resistor; and

a pull-down resistor connected with said current limit resistor in series, wherein said locking signal output terminal of said controller is grounded via said current limit resistor and said pull-down resistor in sequence, and said base is connected with a node between said current limit resistor and said pull-down resistor.

6. The control system, as recited in claim 4, wherein said key locking circuit comprises:

a NPN transistor which has a collector, a grounded emitter and a base, wherein said collector and said emitter are connected with said group of key mapping signal shunts in parallel;

a current limit resistor; and

a pull-down resistor connected with said current limit resistor in series, wherein said locking signal output terminal of said controller is grounded via said current limit resistor and said pull-down resistor in sequence, and said base is connected with a node between said current limit resistor and said pull-down resistor.

7. The control system, as recited in claim 3, wherein said key locking circuit further comprises a diode provided between said locking signal output terminal and said current limit resistor.

8. The control system, as recited in claim 4, wherein said key locking circuit further comprises a diode provided between said locking signal output terminal and said current limit resistor.

9. The control system, as recited in claim 6, wherein said key locking circuit further comprises a diode provided between said locking signal output terminal and said current limit resistor.

10. The control system, as recited in claim 5, wherein said keyboard further comprises an indicating circuit connected with said group of key mapping signal shunts in parallel, wherein said indicating circuit comprises a LED and a LED current limit resistor which are connected in series.

11. The control system, as recited in claim 6, wherein said keyboard further comprises an indicating circuit connected with said group of key mapping signal shunts in parallel, wherein said indicating circuit comprises a LED and a LED current limit resistor which are connected in series.

12. The control system, as recited in claim 9, wherein said keyboard further comprises an indicating circuit connected with said group of key mapping signal shunts in parallel, wherein said indicating circuit comprises a LED and a LED current limit resistor which are connected in series.

13. The control system, as recited in claim 12, wherein said keyboard comprises five key mapping signal shunts respectively corresponding to keys of switching, travel learning, remote control learning, remote control locking, and light controlling.

14. The control system, as recited in claim 12, further comprising an infrared alarm means.

15. The control system, as recited in claim 12, further comprising a remote controller.

16. The control system, as recited in claim 12, further comprising a motion detecting device.

17. A method of transmitting a control signal from a keyboard to a controller to control a garage door, comprising:

connecting each key of the keybard with a resistor to form a key mapping signal shunt;

connecting the key mapping signal shunts in parallel to form a group of key mapping signal shunts;

connecting a divider resistor with the group of key mapping signal shunts in series to form a series circuit;

applying a driving voltage on the series circuit; and

then transmitting a voltage on the group of key mapping signal shunts as the control signal via a voltage signal output circuit to the controller.

18. The method, as recited in claim 17, further comprising:

before transmitting the voltage, connecting a first end of the group of key mapping signal shunts with the divider resistor in series;

grounding a second end of the group of key mapping signal shunts;

connecting a first end of the divider resistor with the group of key mapping signal shunts;

connecting and applying a signal of the driving voltage to a second end of the divider resistor; and

extending the voltage signal output circuit to the controller from a connection point between the group of key mapping signal shunts and the divider resistor.

19. The method, as recited in claim 18, further comprising connecting a locking signal output terminal with a key locking circuit before transmitting the voltage.

20. The method, as recited in claim 19, wherein the key locking circuit comprises:

a NPN transistor which has a collector, a grounded emitter and a base, wherein the collector and the emitter are connected with the group of key mapping signal shunts in parallel;

a current limit resistor; and

a pull-down resistor connected with the current limit resistor in series, wherein the locking signal output terminal of the controller grounded via the current limit resistor and the pull-down resistor in sequence, and the base is connected with a node between the current limit resistor and the pull-down resistor.