Master slave wireless fire alarm and mass notification system

Patent metadata

Field	Value
Publication number	US-9875644-B2
Application number	US-201514846377-A
Country	US
Kind code	B2
Filing date	Sep 4, 2015
Priority date	Sep 9, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

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.

First claim

What is claimed is:

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.

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.

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.

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.

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.

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.

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.

Assignees

• Tyco Fire & Security Gmbh

Inventors

• Chiarizio Martin A
• Feltham Robert

Classifications

• G08B25/10 Primary

  using wireless transmission systems {(G08B25/009 takes precedence)} · CPC title

• H04W56/0055

  determining timing error of reception due to propagation delay · CPC title

• G08B17/10

  Actuation by presence of smoke or gases {, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means} · CPC title

• G08B25/009

  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 title

• G08B25/007

  Details of data content structure of message packets; data protocols · CPC title