Patent ID: 7364353
Filing Date: 2008-04-29
Classification: G01K

Abstract:
1. A method for correcting a temperature signal from a temperature sensor for sensing an ambient temperature in an environment wherein the sensor may be affected by a local heating/cooling source, the method comprising: determining whether the local heating/cooling source is in an on or an off state; monitoring the length of time the local heating/cooing source has been in its current on/off state; estimating a temperature correction factor based upon the current on/off state of the local heating/cooling source and the length of time that the heating/cooling source has been in its current on/off state using a simplified Discrete Kalman Filter analysis in accord with the relationship: where: ΔT u applying said temperature correction factor to the sensed temperature to correct the sensed temperature for any effect from the local heating/cooling source whereby the corrected temperature more accurately reflects the ambient temperature of the environment.