Operating method for a gas sensor and gas sensor

摘要

The disclosure relates to an operating method for a gas sensor, in particular a gas sensor for detecting asthma. According to said method, nitrogen monoxide or nitrogen dioxide is detected in a measuring phase and the gas sensor is heated by a heating device in a desorption phase in order to accelerate desorption. The heating process is continued until the temporal alteration of the measuring signal of the gas sensor falls below a threshold value.

主权项

1. An operating method for a gas sensor for the determination of nitrogen monoxide or nitrogen dioxide concentration, comprising:
operating the gas sensor in a measurement phase during which a first gas having a first concentration of nitrogen monoxide or nitrogen dioxide to be analyzed is delivered to the gas sensor; operating the gas sensor in a regeneration phase during which a second gas with a second concentration of nitrogen monoxide or nitrogen dioxide that is lower than the first concentration is delivered to the gas sensor and the gas sensor is heated to a regeneration temperature which is greater than a measurement temperature by a heater; alternating operation of the gas sensor between the measurement phase and the regeneration phase; determining a change in the measurement signal of the gas sensor as a function of time; and operating the gas sensor unheated as soon as the change in the measurement signal as a function of time falls below a predetermined threshold value.