Master slave wireless fire alarm and mass notification system

• US 9,875,644 B2
• Filed: 09/04/2015
• Issued: 01/23/2018
• Est. Priority Date: 09/09/2014
• Status: Active Grant

• Current Assignee: Johnson Controls Fire Protection LP (Johnson Controls International plc)
• Original Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Inventors: Chiarizio, Martin A., Feltham, Robert
• Primary Examiner(s): McNally, Kerri
• Application Number:
  US14/846,377
• Publication Number:
  US 20160071402A1
• Time in Patent Office: 872 Days
• Field of Search: 34053917
• CPC Class Codes: G08B 17/00 Fire alarms; Alarms responsive to explosion
• CPC Class Codes: G08B 17/10 Actuation by presence of smoke or gases , e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
• CPC Class Codes: G08B 25/007 Details of data content structure of message packets; data protocols
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: G08B 27/00 Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
• CPC Class Codes: G08B 27/008 with transmission via TV or radio broadcast
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0238 where the received signal is an unwanted signal, e.g. interference or idle signal
• CPC Class Codes: H04W 56/0055 determining timing error of reception due to propagation delay
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless fire alarm notification system uses wireless repeater devices to annunciate an alarm to slave devices from the control panel. A notification device provides a local synchronization signal via wire to a secondary notification device. A method enables the activation or deactivation of child device without the child device having to query their parent repeater. A circuit to test the integrity of an active battery charger, a battery, and an isolation circuit is also shown. A method for qualifying that an RF signal meets a specified minimum acceptable level is described. A method for wirelessly sending events to avoid RF link overload is provided. A programming checksum method confirms that an annunciator has latest programming information. A method to automatically process messages from new devices without having to hardcode repeaters to support these new devices is also described.

Claims

1. A wireless fire alarm notification system, comprising:

a control panel for broadcasting alarm messages via wireless links; and

a wireless repeater device having a slave transceiver that receives the alarm messages from the control panel via the wireless links, the wireless repeater device having a master transceiver for wirelessly broadcasting the alarm messages to slave devices;

wherein the wireless repeater device uses the slave transceiver to acquire a network code from the control panel and then the slave transceiver passes the network code to the master transceiver.

2. The system of claim 1, wherein the control panel comprises a master transceiver for broadcasting the alarm messages.

3. The system of claim 1, wherein the slave transceiver of the wireless repeater device receives the alarm messages from the control panel via another wireless repeater device.

4. The system of claim 1, wherein the slave devices are selected from the group consisting of additional repeater devices, annunciators, detection devices, tandem detection devices, utility transmitters, relay units, pull stations, and/or notification devices.

5. The system of claim 4, wherein the notification devices are strobe devices, horn devices, or horn/strobe combo devices.

6. The system of claim 1, wherein the wireless links are bi-directional wireless links for enabling alarm messages to be sent or received between devices on the same wireless link.

7. The system of claim 1, wherein the wireless links are slots of a frequency hopping spread spectrum (FHSS).

8. The system of claim 1, wherein the wireless repeater device listens for beacons and transmits beacons using an unused hopping pattern.

11. The system of claim 1, wherein the wireless repeater device broadcasts alarm signals to its slave devices upon receiving an alarm signal from one of its slave devices.

12. The system of claim 1, further comprising a master notification device for generating synchronization signals.

13. The system of claim 1, wherein the slave devices receive a synchronization signal via a wire and generate alarm notifications in response to the alarm signals from the control panel and the synchronization signal.

15. The system of claim 1, wherein the wireless repeater device further comprises a master interface antenna and a slave interface antenna, the slave transceiver using the slave interface antenna to receive the alarm messages from the control panel and the master transceiver using the master interface antenna to broadcast the alarm messages to the slave devices.

17. The system of claim 1, wherein the wireless repeater device uses the master transceiver to select an unused hopping pattern and to transmit a beacon.

9. A wireless fire alarm notification system, comprising:

a control panel for broadcasting alarm messages via wireless links; and

a wireless repeater device having a slave transceiver that receives the alarm messages from the control panel via the wireless links, the wireless repeater device having a master transceiver for wirelessly broadcasting the alarm messages to slave devices;

wherein the slave devices attempt to enroll or register, and switch to a new frequency upon failing to enroll or register.

10. A wireless fire alarm notification system, comprising:

a control panel for broadcasting alarm messages via wireless links; and

a wireless repeater device having a slave transceiver that receives the alarm messages from the control panel via the wireless links, the wireless repeater device having a master transceiver for wirelessly broadcasting the alarm messages to slave devices;

wherein the slave devices seek to join a new master device after failing to receive an acknowledgement from a previous master device.

16. The system of claim 10, wherein the wireless repeater device uses the slave transceiver to acquire a network code from the control panel and then the slave transceiver passes the network code to the master transceiver.

14. A wireless fire alarm notification system, comprising:

a control panel including a master transceiver for broadcasting alarm messages via wireless links; and

a wireless repeater device having a slave transceiver that receives the alarm messages from the control panel via the wireless links, the wireless repeater device having a master transceiver for wirelessly broadcasting the alarm messages to slave devices, wherein the slave devices are selected from the group consisting of additional repeater devices, annunciators, detection devices, tandem detection devices, utility transmitters, relay units, pull stations, and/or notification devices; and

wherein the wireless links are slots of a frequency hopping spread spectrum (FHSS) with the wireless repeater device listening for beacons and transmits beacons using an unused hopping pattern and the slave devices attempt to enroll or register, and switch to a new frequency upon failing to enroll or register.