Patent ID: 7676340
Filing Date: 2010-03-09
Classification: G01C,G01K

Abstract:
1. A temperature sensor that provides corrected temperature data to a physical quantity sensor, the temperature sensor comprising: a temperature detection unit that measures an ambient temperature and outputs a temperature value representative of the measured ambient temperature; a storage unit; a correction data writing unit that receives, at the time of manufacture of the temperature sensor, a first temperature value from the temperature detection unit under a first ambient temperature, and receives a second temperature value output from the temperature detection unit under a second ambient temperature, the correction data writing unit calculates an initial temperature value on the basis of the first temperature value alone, the correction data writing unit further calculates a correction temperature value based on a difference between the first temperature value and the second temperature value, wherein the correction data writing unit writes the initial temperature value and the correction temperature value into the storage unit; a correction data reading unit that reads the initial temperature value and the correction temperature value from the storage unit at a time of actual use of the temperature sensor after manufacture; and a correction unit that receives an actual use temperature value from said temperature detection unit at the time of actual use, and generates the corrected temperature data by applying a predetermined calculation to the received actual use temperature value based on the initial temperature value and the correction temperature value read by the correction data reading unit, so that the correction unit can output the corrected temperature data to the physical quantity sensor.