US 12,235,167 B2
Temperature sensor
Hrishikesh Joshi, Erlangen (DE); and Andreas Held, Erlangen (DE)
Assigned to Valeo Siemens eAutomotive Germany GmbH, Erlangen (DE)
Filed by Valeo Siemens eAutomotive Germany GmbH, Erlangen (DE)
Filed on May 4, 2022, as Appl. No. 17/661,976.
Claims priority of application No. 10 2021 204 505.7 (DE), filed on May 5, 2021.
Prior Publication US 2022/0364935 A1, Nov. 17, 2022
Int. Cl. G01K 1/20 (2006.01); G01K 7/22 (2006.01); G01K 13/08 (2006.01)
CPC G01K 1/20 (2013.01) [G01K 7/22 (2013.01); G01K 13/08 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A temperature sensor comprising:
an electrical circuit including a thermistor configured to be placed next to an object;
a temperature measurement module configured for determining a measured temperature of the thermistor from an electrical quantity of the electrical circuit that depends on a resistance of the thermistor; and
a command module configured for providing a command to the electrical circuit for modifying the electrical circuit behavior in a way that changes a current flowing in the thermistor;
a thermal loss determination module configured for determining a thermal loss of the thermistor from the thermistor measured temperature and the command; and
a temperature estimation module configured for estimating a temperature of the object from the thermistor measured temperature and from the thermal loss of the thermistor;
wherein the temperature estimation module comprises:
a global dynamic thermal model configured for providing the object estimated temperature, including, coupled together:
a dynamic thermal model of the thermistor having a thermistor thermal loss parameter, and
a dynamic thermal model of the object;
a state observer configured to estimate a thermal loss correction from the thermistor measured temperature and the object estimated temperature; and
a correction module configured for correcting the thermal loss of the thermistor according to the thermal loss correction to provide the thermistor thermal loss parameter.