Temperature compensation method for gas sensor module using change of heater current

• Main Authors: Kim, Yang-Ki, Sohn, Hyun-Soo, Kwon, Jong-Min, Kim, Ji-Hye, Lee, Tae-Won, Oh, Sun-Mi
• Format: Patent
• Language: English
• Published: 31.12.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A temperature compensation method for a gas sensor module using a change of heater current, may include deriving an output voltage equation of the gas sensor module from a cell reaction equation of an electrolyte and deriving the output voltage equation to an equation for a fluctuation temperature which varies depending on a sensor temperature and an unknown type compensation coefficient; deriving the fluctuation temperature to heater current indicating a current value of a heater formed in the gas sensor module and deriving the output voltage equation by the heater current and the compensation coefficient; and measuring output voltage depending on current of heaters at two or more points to determine the compensation coefficient of the output voltage equation, and the output voltage is configured to be compensated with the change of the heater current measured by the gas sensor module regardless of an external temperature.