Techniques for calculating gas concentrations in a fluid environment

摘要

A method can be performed by adjusting a temperature of a gas sensor to a first temperature value for a first period of time and a second temperature value for a second period of time. The gas sensor signal may be measured during the first period of time to determine a first signal value and during the second period of time to determine a second value. Then, concentration information for at least one gas is calculated according to the first signal value and the second signal value. While the gas sensor signal may include information about a presence of a first gas and a second gas, the concentration information for the at least one gas may not substantially include concentration information for the second gas.

主权项

1. A system comprising:
a sensing unit including:
a gas sensor configured to generate a gas sensor signal in response to a presence of at least one gas, anda heater configured to adjust a temperature of the sensor; and at least one processor adapted to:
control the heater to adjust the temperature of the sensor to a first temperature at a first time;determine a first signal value by measuring the gas sensor signal at the first time;control the heater to adjust the temperature of the sensor to a second temperature at a second time, wherein the first temperature and the second temperature are different;determine a second signal value by measuring the gas sensor signal at the second time; andcalculate concentration information for the at least one gas based at least in part on:
the first signal value and a relationship between resistance of the gas sensor versus a concentration of H2 when the gas sensor is at the first temperature; andthe second signal value and a relationship between resistance of the gas sensor versus a concentration of H2 when the gas sensor is at the second temperature.