Detection system for an electronic enclosure

• US 6,262,668 B1
• Filed: 01/04/1999
• Issued: 07/17/2001
• Est. Priority Date: 01/04/1999
• Status: Expired due to Term

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Shatil, Arod, Mulvihill, Timothy M., Maloof, George S. Jr.
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): La, Anh
• Application Number:
  US09/224,968
• Time in Patent Office: 925 Days
• Field of Search: 340/627, 340/628, 340/629, 340/630, 340/571, 340/570, 340/577, 705/85, 705/188, 700/275, 169/60, 169/65, 169/70, 169/61
• US Class Current: 340/627
• 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 17/113 Constructional details

Abstract

A method and apparatus is provided for detecting airborne particles in an electronic enclosure. The electronic enclosure may be used to house one or more electronic devices or components of an electronic system, such as a computer or data storage system. A particle detection system is provided to monitor the air within the enclosure and to generate an alarm signal in response to detection of a threshold level of airborne particles within the enclosure that is indicative of an operational anomaly associated with at least one of the electronic devices or components. In response to the alarm signal, the electronic devices housed within the enclosure may be automatically shut down to reduce potential damage to at least the devices housed within the enclosure. The detection system is particularly suited for detecting the presence of smoke within an electronic enclosure, such as may be generated during a combustion event by overheated or electrically shorted electronic components.

Claims

1. In a system including a sensor and an electronic enclosure housing at least one electronic component therein, a method comprising steps of:

(A) monitoring an output of the sensor that indicates the presence of an operational anomaly with the at least one electronic component; and

(B) when the output of the sensor indicates the presence of an operational anomaly with the at least one electronic component, performing steps of;

(1) determining whether a fault condition is present with respect to the sensor;

(2) disregarding the indication of the presence of an operational anomaly with the at least one electronic component when a fault condition is determined to be present with respect to the sensor; and

(3) performing an action with respect to the at least one electronic component when no fault condition is determined to be present with respect to the sensor.

2. The method of claim 1, wherein the sensor comprises an airborne particle detector.

3. The method of claim 2, wherein the step (B)(1) comprises:

attempting to receive information descriptive of airborne particles in air received by the airborne particle detector from the electronic enclosure; and

determining that the fault condition is present when the attempt fails.

4. The method of claim 2, wherein the step (B)(1) comprises:

receiving information descriptive of the airborne particle detector;

comparing the received information descriptive of the airborne particle detector to stored information descriptive of the airborne particle detector; and

determining that the fault condition is present when the comparison fails.

5. The method of claim 2, wherein the airborne particle detector includes a smoke detector and the output monitored in step (A) is indicative of a combustion event with the at least one electronic component.

6. The method of claim 1, wherein the step (B)(3) comprises initiating a shutdown sequence to terminate power to the at least one electronic component.

7. A computer readable medium encoded with a program for execution on a processor in a detection system for use with a computer system including a sensor and an electronic enclosure housing at least one electronic component therein, wherein the program when executed on the processor, performs a method comprising steps of:

(A) monitoring an output of the sensor that indicates the presence of an operational anomaly with the at least one electronic component; and

(B) when the output of the sensor indicates the presence of an operational anomaly with the at least one electronic component, performing steps of;

(1) determining whether a fault condition is present with respect to the sensor;

(2) disregarding the indication of the presence of an operational anomaly with the at least one electronic component when a fault condition is determined to be present with respect to the sensor; and

(3) performing an action with respect to the at least one electronic component when no fault condition is determined to be present with respect to the sensor.

8. The computer readable medium of claim 7, wherein the sensor comprises an airborne particle detector.

9. The computer readable medium of claim 8, wherein the step (B)(1) comprises:

attempting to receive information descriptive of airborne particles in air received by the airborne particle detector from the electronic enclosure; and

determining that the fault condition is present when the attempt fails.

10. The computer readable medium of claim 8, wherein the step (B)(1) comprises:

receiving information descriptive of the airborne particle detector;

comparing the received information descriptive of the airborne particle detector to stored information descriptive of the airborne particle detector; and

determining that the fault condition is present when the comparison fails.

11. The computer readable medium of claim 8, wherein the step (B)(3) comprises initiating a shutdown sequence to terminate power to the at least one electronic component.

12. The computer readable medium of claim 8, wherein the airborne particle detector includes a smoke detector and the output monitored in step (A) is indicative of a combustion event with the at least one electronic component.

13. A detection system for use with a computer system including a sensor and an electronic enclosure housing at least one electronic component therein, the detection system comprising:

a detector to monitor an output of the sensor that indicates the presence of an operational anomaly with the at least one electronic component; and

a controller to, when the output of the sensor indicates the presence of an operational anomaly with the at least one electronic component;

determine whether a fault condition is present with respect to the sensor;

disregard the indication of the presence of an operational anomaly with the at least one electronic component when a fault condition is determined to be present with respect to the sensor; and

perform an action with respect to the at least one electronic component when no fault condition is determined to be present with respect to the sensor.

14. The detection system of claim 13, wherein the sensor comprises an airborne particle detector.

15. The detection system of claim 14, wherein the controller is further configured to:

attempt to receive information descriptive of airborne particles in air received by the airborne particle detector from the electronic enclosure; and

determine that the fault condition is present when the attempt fails.

16. The detection system of claim 14, wherein the controller is further configured to:

receive information descriptive of the airborne particle detector;

compare the received information descriptive of the airborne particle detector to stored information descriptive of the airborne particle detector; and

determine that the fault condition is present when the comparison fails.

17. The detection system of claim 14, wherein the controller is further configured to initiate a shutdown sequence to terminate power to the at least one electronic component.

18. The detection system of claim 14, wherein the airborne particle detector includes a smoke detector and the output monitored by the smoke detector is indicative of a combustion event with the at least one electronic component.