Master slave wireless fire alarm and mass notification system

Patent metadata

Field	Value
Publication number	US-10966154-B2
Application number	US-201916591994-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Sep 9, 2014
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

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 method for controlling activation and deactivation of a child device in a wireless fire alarm and/or mass notification system, comprising:
the child device wirelessly sending a registration request to a parent repeater;
the parent repeater wirelessly sending an assignment message to the child device in response to the registration request, wherein the assignment message includes an identification address associated with the child device for distinguishing the child device from other child devices within a subnet of the parent repeater;
in response to smoke detectors of the child devices detecting smoke, the child devices reporting alarm event messages to the parent repeater and the parent repeater passing the alarm event messages to a control panel;
the parent repeater also in response to receiving the alarm event messages from the child devices transmitting a notification activation message to the subnet of child devices, wherein the notification activation message includes a notification state for each child device of the subnet corresponding to tripped zones associated with the alarm event messages; and
the child device activating or deactivating an alarm based on the notification activation message, the child device activating an alarm by operating an alarm annunciator to generate an audible fire alarm to occupants.

2. The method of claim 1 ; wherein the notification activation message includes a bitmask listing the notification state for each child device of the subnet.

3. The method of claim 1 , wherein the child device is a tandem detector device.

4. The method of claim 1 , wherein the child device is a strobe device, horn device, or horn/strobe combo device.

5. The method of claim 1 , wherein the identification address is an 8-bit local identification number.

6. The method of claim 1 , further comprising the parent repeater transmitting a beacon message signaling the child device to wake-up from a sleep mode and listen for the notification activation message prior to the parent repeater transmitting the notification activation message.

7. The method of claim 1 , wherein the parent repeater includes a notification device for generating an audible fire alarm to occupants.

8. The method of claim 1 , wherein the parent repeater includes a strobe device, horn device, or horn/strobe combo device.

9. The method of claim 1 , wherein the messages between the parent repeater and the child device are transmitted wirelessly.

10. A notification system of a wireless fire alarm and/or mass notification system, comprising:
child devices wirelessly sending registration requests and in response to smoke detectors of the child devices detecting smoke, the child devices reporting alarm event messages, and
a parent repeater receiving the registration requests and the alarm event messages, and wirelessly sending assignment messages to the child devices in response to the registration requests, wherein the assignment messages include an identification address associated with the child devices for distinguishing the child devices from each other within a subnet of the parent repeater, wherein the parent repeater further passing the alarm event messages to a control panel and transmitting notification activation messages to the subnet of child devices in response to receiving the alarm event messages from the child devices, wherein the notification activation messages include a notification state for each of the child devices of the subnet corresponding to tripped zones associated with the alarm event messages, and the child device activating or deactivating an alarm based on the notification activation message, the child device activating an alarm by operating an alarm annunciator to generate an audible fire alarm to occupants.

11. The system of claim 10 , wherein the notification activation message includes a bitmask listing the notification state for each child device of the subnet.

12. The system of claim 10 , wherein the child devices include tandem detector devices.

13. The system of claim 10 , wherein the child devices include strobe devices, horn devices, or horn/strobe combo devices.

14. The system of claim 10 , wherein the identification address is an 8-bit local identification number.

15. The system of claim 10 , wherein the parent repeater transmits a beacon message signaling the child devices to wake-up from a sleep mode and listen for the notification activation message prior to the parent repeater transmitting the notification activation message.

16. The system of claim 10 , wherein the parent repeater includes a notification device for generating an audible fire alarm to occupants.

17. The system of claim 10 , wherein the parent repeater includes a strobe device, horn device, or horn/strobe combo device.

18. The system of claim 10 , wherein the messages between the parent repeater and the child devices are transmitted wirelessly.

Assignees

• Johnson Controls Fire Prot Lp

Inventors

• Chiarizio Martin A
• Feltham Robert

Classifications

• G08B25/10

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

• G08B25/007

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

• H04W52/0238 Primary

  where the received signal is an unwanted signal, e.g. interference or idle signal · CPC title

• H04B1/713

  using frequency hopping · CPC title