Intelligent remote test/display unit for duct smoke detector

• US 7,834,755 B2
• Filed: 12/21/2005
• Issued: 11/16/2010
• Est. Priority Date: 12/21/2005
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Harter, David P., Butalla, Fred M. III
• Primary Examiner(s): Lu; Shirley
• Application Number:
  US11/316,159
• Publication Number:
  US 20070139184A1
• Time in Patent Office: 1,791 Days
• Field of Search: 340/506, 340/522, 340/628, 340/632, 738631-86333
• US Class Current: 340/506
• 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 29/145 of fire detection circuits

Abstract

A remote accessory unit can communicate via a data protocol with one or more displaced duct detector control units. The accessory unit can present status indicators visually, on a per sensor basis. Both audible and visible annunciators can be provided to indicate an alarm condition.

Claims

1. A system comprising:

a duct detector;

first and second ambient condition sensors incorporated into the duct detector;

a visual status indicator associated with each of the first and second ambient condition sensors;

a displaced control unit, said control unit having separate first, second, and third communication mediums, the first and second communication mediums used for independently communicating with the respective first and second ambient condition sensors;

control circuitry of the displaced control unit that assigns a priority to each of the first and second ambient condition detectors, queries the respective ambient condition sensors for sensor data, initiates an alarm condition based upon analysis of data received from at least one of the respective first and second ambient condition sensors and controls the visible status indicator on the at least one of the first and second ambient condition sensors to indicate an alarm condition rather than having the at least one of the first and second ambient condition sensors control the visual status indicator independently;

an alarm indicating relay of the displaced control unit associated with the control circuitry where the assigned priorities are used to activate the at least one relay without effecting a state of the visible status indicator on each of the at least two duct sensors;

a remote display device, the remote display device including a display for visually presenting status of the respective first and second ambient condition sensors coupled to the displaced control unit, the remote display device communicating with the displaced control unit via the third communication medium; and

a manually operable duct sensor command input element associated with the remote display device for receiving user inputs;

wherein the first and second ambient condition sensors are coupled directly to the displaced control unit and communicate with the displaced control unit via the respective first and second communication mediums on a per sensor basis, and

wherein the remote display device is remotely located from the displaced control unit and sensors, the remote display device sends and receives communications via the third communication medium on a per sensor basis.

2. A system as in claim 1 where the interface circuitry includes circuitry that receives data via at least one of a wired or wireless medium.

3. A system as in claim 2 where the circuits include software which receives duct sensor data from the communications interface.

4. A system as in claim 2 where the circuit includes a state machine which receives duct sensor data from the communications interface.

5. A system as in claim 1 that includes circuitry for measuring and transmitting the sensitivity information of multiple sensors.

6. A system as in claim 1 where the remote display device includes an audible enunciator.

7. A system as in claim 1 where the remote display device includes a visible enunciator.

8. A system comprising:

a duct detector;

at least two ambient condition detectors incorporated into the duct detector;

a visual status indicator associated with each of the at least two ambient condition detectors;

a displaced control unit directly coupled to the at least two ambient condition detectors;

control circuitry of the displaced control unit that assigns a priority to each of the at least two ambient condition detectors, that queries the respective at least two ambient condition detectors for sensor data, initiates an alarm condition based upon analysis of data received from at least one of the at least two ambient condition detectors, and controls the visible status indicator on the at least one of the at least two ambient condition detectors to indicate an alarm condition rather than the at least one of the at least two ambient condition detectors controlling the visual status indicator independently;

an alarm indicating relay of the displaced control unit activated by the control circuitry where the assigned priorities are used to activate the at least one relay without effecting a state of the visible status indicator on each of the at least two ambient condition detectors;

a remote display unit, the remote display unit including a display for visually presenting status of the respective at least two ambient condition detectors coupled to the displaced control unit, the display is located on the remote display unit;

a communications interface carried by the remote display unit for remotely communicating with the displaced control unit on a per ambient condition detector basis; and

control circuits carried by the remote display unit and coupled to the communications interface;

wherein the remote display unit includes at least one manually operable duct sensor command input element for receiving a test or reset command for one of the at least two ambient condition detectors,

wherein the at least two ambient condition detectors communicate with the displaced control unit on a per ambient condition detector basis,

wherein the remote display unit is remotely located from the displaced control unit and at least two ambient condition detectors, and

wherein the received test or reset command is transmitted to the one of the at least two ambient condition detectors.

9. A system as in claim 8 where the remote display unit includes a plurality of manually operable duct detector command input elements.

10. A system as in claim 8 where the interface circuitry includes circuitry that transmits and receives data via at least one of a wired or wireless medium.

11. A system as in claim 10 where binary or analog data is transmitted to the displaced control unit by the circuitry that transmits and receives.

12. A system as in claim 11 where at least some of the binary or analog data comprises duct sensor commands.

13. A system as in claim 12 where at least one input element specifies a sensor to which a command is directed.

14. A system as in claim 13 where binary or analog data is received from the displaced control unit by the circuitry that transmits and receives.

15. A system as in claim 14 where the control circuits include control software which couples duct detector commands to the communications interface.

16. A system as in claim 14 where the control circuits include a state machine which couples duct detector commands to the communications interface.

17. A system as in claim 14 where the control circuits include control software which receives duct detector feedback from the communications interface.

18. A system as in claim 14 where the control circuits include a state machine which receives duct detector feedback from the communications interface.