Ambient and processor temperature difference comparison

• US 9,472,085 B2
• Filed: 05/31/2012
• Issued: 10/18/2016
• Est. Priority Date: 05/31/2012
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Lin, Hsin-Tso
• Primary Examiner(s): Lau, Hoi
• Application Number:
  US14/383,985
• Publication Number:
  US 20150029032A1
• Time in Patent Office: 1,601 Days
• Field of Search: 340/584, 340/506, 340/539.26, 340/589, 340/588, 340/636.18, 340/449, 340/870.17, 702/130, 702/132, 702/136, 374/163, 374/142, 361/679.54, 361/687
• US Class Current: 1/1
• CPC Class Codes: G06F 1/206 comprising thermal management
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold

Abstract

Embodiments herein relate to ambient and processor temperature difference comparison. Processor and ambient temperatures are measured. A difference between the processor and ambient temperatures is compared to an initial difference. A warning may be signaled if a difference between the determined difference and the initial difference is greater than a threshold value.

Claims

1. A method, comprising:

measuring a current processor temperature of a processor of a device;

measuring a current ambient temperature inside the device;

determining a difference between the current processor temperature and the current ambient temperature;

comparing the determined difference to an initial difference; and

generating a warning if a difference between the determined difference and the initial difference is greater than a threshold value.

2. The method of claim 1, further comprising:

measuring an initial processor temperature of the processor;

measuring an initial ambient temperature; and

determining a difference between the initial processor temperature and the initial ambient temperature to determine the initial difference, wherein

the processor is throttled to full utilization during the initial and current processor temperature measurements, and

the initial processor and ambient temperatures are measured before the current processor and ambient temperatures.

3. The method of claim 2, wherein the initial difference value is set a first time the device is powered on at least one of after being manufactured and distributed to a consumer.

4. The method of claim 2, wherein the initial and current processor temperatures are measured after the initial and current processor temperatures become substantially stable.

5. The method of claim 2, wherein,

the initial and current ambient temperatures correspond to a temperature of an air passage away from the processor,

the initial and current processor temperatures relate to a temperature at least one of inside and next to the processor, and

the warning is to indicate to clean the device.

6. The method of claim 2, wherein the determined difference is calculated a next time the device is powered on after the warning is generated to determine if the device is clean.

7. The method of claim 2, wherein the the initial processor temperature, the the initial ambient temperature, and the difference between the initial processor temperature and the initial ambient temperature is updated to reset the initial difference, if the device is powered on after being cleaned.

8. The method of claim 1, wherein the threshold value is a percentage of the initial difference, the percentage to be set by at least one of a user, distributor and a manufacturer of the device.

9. The method of claim 1, wherein the determined difference is calculated periodically according to a schedule, the schedule to be set by at least one of the user, distributor and a manufacturer of the device.

10. A system, comprising:

a processor temperature module to measure a temperature of a processor of a device at an initial time period and a later time period after the initial time period;

an ambient temperature module to measure a temperature of air inside the device during the initial time and at the later time period;

a performance module to determine an initial difference between the processor and ambient temperature during the initial time period and to determine a later difference between the processor and ambient temperature during the later time period; and

a warning module to generate a warning if a final difference between the initial and final differences is greater than a threshold value.

11. The system of claim 10, wherein the initial time period is during a time when an interior of the device is substantially free of dust.

12. The system of claim 11, wherein the processor is throttled to full capacity while the processor temperature module measures the temperature of the processor.

13. The system of claim 12, wherein the processor temperature module measures the temperature of the processor after the temperature of the processor substantially stabilizes.

14. A non-transitory computer-readable storage medium storing instructions that, if executed by a processor of a device, cause the processor to:

measure a temperature of the processor;

measure a temperature of ambient air at the device;

determine a later difference between the temperature of the processor and temperature of the ambient air;

determine a final difference between the later difference and an initial difference; and

generate a warning if the final difference is greater than a threshold value.

15. The non-transitory computer-readable storage medium of claim 14, wherein,

the initial difference is based on a difference between the temperature of the processor and the temperature of the ambient air when the device is in a dust-free condition,

the temperature of the processor is measured while the processor is being fully utilized, and

the later difference is determined after the initial difference.