Emergency lighting system with improved monitoring

• US 7,999,666 B2
• Filed: 07/11/2008
• Issued: 08/16/2011
• Est. Priority Date: 09/12/2003
• Status: Expired due to Fees

• Current Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Original Assignee: Simplexgrinnell LP (Johnson Controls International plc)
• Inventors: Barrieau, Johnpaul P., Barrieau, Mark B., Brooks, Jeffrey R.
• Primary Examiner(s): Bugg; George
• Assistant Examiner(s): WANG, JACK K
• Application Number:
  US12/172,014
• Publication Number:
  US 20080266076A1
• Time in Patent Office: 1,131 Days
• Field of Search: 340/506, 340/628, 340/286.01, 340/331
• US Class Current: 340/506
• CPC Class Codes: G08B 17/00 Fire alarms; Alarms responsive to explosion
• CPC Class Codes: G08B 7/06 using electric transmission , e.g. involving audible and visible signalling through the use of sound and light sources
• CPC Class Codes: H05B 47/185 via power line carrier transmission
• CPC Class Codes: H05B 47/22 with communication between the lamps and a central unit

Abstract

An emergency lighting unit includes a lamp, a backup battery, controller, and a network interface. The controller connects the backup battery to the lamp upon detection of an emergency condition and loss of main power. The network interface interfaces with and receives commands from a fire alarm control panel via a fire alarm network. Each emergency lighting unit may have a unique identifier with respect to the fire alarm network.

Claims

1. In a fire alarm system comprising a fire alarm control panel, a fire alarm network connected to the fire alarm control panel, an emergency exit lighting unit in communication with the fire alarm network, the emergency exit lighting unit comprising a lamp for providing illumination of an exit and/or illumination of the exit route, a backup battery, a controller that connects the backup battery to the lamp upon detection of loss of main power, and a network interface which interfaces with and receives communications from the fire alarm control panel via the fire alarm network, the emergency lighting unit having a unique identifier with respect to the fire alarm network, a method for testing the emergency exit lighting unit, comprising:

receiving, by the emergency lighting unit, a communication sent from the fire alarm control panel related to state information of the emergency lighting unit;

accessing, by the emergency lighting unit, the state information for at least one aspect related to the emergency lighting unit; and

sending, by the emergency lighting unit, at least a part of the state information to the fire alarm control panel.

2. The method of claim 1, wherein the communication sent from the fire alarm control panel is a test command.

3. The method of claim 2, wherein the test command comprises a command to test the emergency lighting unit;

and

wherein, in response to receiving the test command, the emergency lighting unit sends at least a part of the state information to the fire alarm control panel.

4. The method of claim 2, wherein the emergency exit lighting unit is tested on a periodic schedule.

5. The method of claim 1, wherein accessing the state information includes performing a test to generate the state information;

and

wherein the at least a part of the state information is sent to the fire alarm control panel after generating the state information.

6. The method of claim 1, wherein the state information comprises at least one of status of the battery and state of the lamp .

7. The method of claim 1, wherein the state information comprises an indication of at least one of voltage across the battery or current draw from the battery.

8. The method of claim 6, wherein the state information comprises an indication of at least one of a defective lamp or a bulb in the lamp being burned out.

9. The method of claim 1, where the fire alarm control panel schedules each emergency lighting unit connected to the fire alarm network for testing, and issues a command to each emergency lighting unit to begin testing its respective battery by discharging it and measuring at least one of current and voltage during the discharge time.

10. The method of claim 9, wherein timing of the testing of each of the emergency light units is predetermined.

11. The method of claim 9, wherein the timing comprises a periodic schedule.

12. The method of claim 11, wherein the period schedule is selectable by a user.

22. The method of claim 1, wherein accessing the state information includes accessing a test log.

23. The method of claim 22, wherein the communication is a command to the emergency exit lighting unit to report the test log.

13. In a fire alarm system comprising a fire alarm control panel, a fire alarm network connected to the fire alarm control panel, an emergency exit lighting unit in communication with the fire alarm network, the emergency exit lighting unit comprising a lamp for providing illumination of an exit, a backup battery, a controller that connects the backup battery to the lamp upon detection of loss of main power, and a network interface which interfaces with and receives communications from the fire alarm control panel via the fire alarm network, the emergency exit lighting unit having a unique identifier with respect to the fire alarm network, a method for monitoring the emergency exit lighting unit, comprising:

receiving a communication from the fire alarm control panel via the fire alarm network to provide status or to test of the emergency exit lighting unit;

in response to receiving the communication, the emergency exit lighting unit generating information regarding at least one aspect of the emergency exit lighting unit; and

sending at least a part of the generated information to the fire alarm control panel.

14. The method of claim 13, wherein generating information regarding at least one aspect of the emergency exit lighting unit comprises generating, by the emergency exit lighting unit, test data regarding testing of the backup battery of the emergency exit lighting unit.

15. The method of claim 14, wherein the communication is a test command to the emergency exit lighting unit to perform a test.

16. The method of claim 14, wherein the communication is a command to the emergency exit lighting unit to report a log of a previously performed test.

17. The method of claim 13, wherein the emergency exit lighting unit is tested monthly.

18. The method of claim 13, wherein the at least one aspect of the emergency exit lighting unit comprises status of the battery and state of the light.

19. The method of claim 13, wherein the fire alarm control panel generates a schedule to test each emergency exit lighting unit within the fire alarm network, and

wherein the fire alarm control panel issues a command to each emergency exit lighting unit based on the schedule to test the emergency light unit'"'"'s respective battery by discharging it and measuring the current and voltage during the discharge time.

20. In a fire alarm system comprising a fire alarm control panel, a fire alarm network connected to the fire alarm control panel, an emergency exit lighting unit in communication with the fire alarm network, the emergency exit lighting unit comprising a lamp for providing illumination of an exit, a backup battery, a controller that connects the backup battery to the lamp upon detection of loss of main power, and a network interface which interfaces with and receives communications from the fire alarm control panel via the fire alarm network, the emergency exit lighting unit having a unique identifier with respect to the fire alarm network, a method for monitoring the emergency exit lighting unit, comprising:

receiving a communication from the fire alarm control panel via the fire alarm network, the communication regarding testing of the emergency exit lighting unit;

in response to receiving the communication, the controller testing the backup battery of the emergency exit lighting unit;

generating, by the emergency exit lighting unit, test data regarding the testing of the backup battery of the emergency exit lighting unit; and

sending at least a part of the test data regarding the testing of the backup battery to the fire alarm control panel.

21. The method of claim 20, wherein the communication received from the fire alarm control panel comprises a testing command.