Ambient temperature estimation

Patent metadata

Field	Value
Publication number	US-10254178-B2
Application number	US-201414229805-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Mar 28, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

Techniques for estimating ambient temperature are described herein. Temperature data may be received from a first sensor of a computing device. Temperature data may be received from a second sensor of a computing device. The ambient temperature may be estimated based on the first temperature data in relation to the second temperature data.

First claim

What is claimed is:

1. A computing device, comprising logic, at least partially comprising hardware logic, to:
receive first temperature data from a first sensor of the computing device;
receive second temperature data from a second sensor of the computing device;
estimate ambient temperature of an environment external to the computing device based on the first temperature data in relation to the second temperature data, wherein the computing device is sealed without an airflow and the computing device lacks an air inlet to measure ambient temperature; and
adjust a maximum operating temperature of the device based on the ambient temperature.

2. The computing device of claim 1 , wherein the first sensor is disposed in an area of the computing device generating less heat during operation of the computing device than an area in which the second sensor is disposed.

3. The computing device of claim 1 , wherein estimating ambient temperature comprises relating the first temperature data to the constant applied to a difference between the second temperature data and the first temperature data.

4. The computing device of claim 1 , wherein the constant is a function of factors comprising:
a thermal conductivity of a circuit board disposing the first sensor and the second sensor;
a cross sectional area of the circuit board between the first sensor and the second sensor;
a thermal resistance from the first sensor to the external environment; and
a distance between the first sensor and the second sensor.

5. The computing device of claim 1 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises applying additional constants to the differences between temperatures from additional sensors.

6. The computing device of claim 1 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises incorporating a second constant to the difference between the first temperature data and a historical average of temperature data from the first sensor.

7. The computing device of claim 1 , wherein the logic is to adjust a maximum operating temperature of the computing device based on the estimated ambient temperature.

8. A system, comprising:
a first sensor;
a second sensor;
logic, at least partially comprising hardware logic, to:
receive first temperature data from the first sensor of a computing device;
receive second temperature data from the second sensor of the computing device;
estimate ambient temperature of an environment external to the computing device based on the first temperature data in relation to the second temperature data, wherein the system is sealed without an airflow and the computing device lacks an air inlet to measure ambient temperature; and
adjust a maximum operating temperature of the device based on the ambient temperature.

9. The system of claim 8 , wherein the first sensor is disposed in an area of the computing device generating less heat during operation of the computing device than an area in which the second sensor is disposed.

10. The system of claim 8 , wherein estimating ambient temperature comprises relating the first temperature data to a constant applied to a difference between the second temperature data and the first temperature data.

11. The system of claim 10 , wherein the constant is a function of factors comprising:
a thermal conductivity of a circuit board disposing the first sensor and the second sensor;
a cross sectional area of the circuit board between the first sensor and the second sensor;
a thermal resistance from the first sensor to the external environment; and
a distance between the first sensor and the second sensor.

12. The system of claim 10 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises applying additional constants to the differences between temperatures from additional sensors.

13. The system of claim 10 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises incorporating a second constant to the difference between the first temperature data and a historical average of temperature data from the first sensor.

14. The system of claim 8 , wherein the logic is to adjust a maximum operating temperature of the computing device based on the estimated ambient temperature.

15. A non-transitory computer readable medium including code, when executed, to cause a processing device to carry out operations, the operations comprising:
receiving first temperature data from a first sensor of a computing device;
receiving second temperature data from a second sensor of the computing device;
estimating ambient temperature of an environment external to the computing device based on the first temperature data in relation to the second temperature data, wherein the computing device is sealed without an airflow and the computing device lacks an air inlet to measure ambient temperature; and
adjusting a maximum operating temperature of the device based on the ambient temperature.

16. The computer readable medium of claim 15 , wherein the first sensor is disposed in an area of the computing device generating less heat during operation of the computing device than an area in which the second sensor is disposed.

17. The computer readable medium of claim 15 , wherein estimating ambient temperature comprises relating the first temperature data to the constant applied to a difference between the second temperature data and the first temperature data.

18. The computer readable medium of claim 15 , wherein the constant is a function of factors comprising:
a thermal conductivity of a circuit board disposing the first sensor and the second sensor;
a cross sectional area of the circuit board between the first sensor and the second sensor;
a thermal resistance from the first sensor to the external environment; and
a distance between the first sensor and the second sensor.

19. The computer readable medium of claim 15 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises applying additional constants to the differences between temperatures from additional sensors.

20. The computer readable medium of claim 15 , wherein the constant is a first constant, wherein estimating ambient temperature further comprises incorporating a second constant to the difference between the first temperature data and a historical average of temperature data from the first sensor.

21. The computer readable medium of claim 15 , the operations further comprising adjusting a maximum operating temperature of the computing device based on the estimated ambient temperature.

Assignees

• Intel Corp

Inventors

• Carbone Mark
• Karayacoubian Paul

Classifications

• G01K1/20

  Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature · CPC title

• G01K7/42 Primary

  Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature · CPC title