Oxygen partial pressure sensor poisoning life evaluation method based on performance degradation data fitting

The invention provides an oxygen partial pressure sensor poisoning life evaluation method based on performance degradation data fitting, and the method comprises the steps: analyzing and determining the influence factors of the poisoning degradation of an oxygen partial pressure sensor based on an electrode poisoning fault mode and a degradation mechanism of the oxygen partial pressure sensor; determining parameter information of poisoning degradation test design of the oxygen partial pressure sensor, and constructing a corresponding oxygen partial pressure sensor poisoning degradation test device based on the influence factors; performing an oxygen partial pressure sensor poisoning degradation test through the oxygen partial pressure sensor poisoning degradation test device to obtain test process monitoring data; fitting the monitoring data in the test process, and establishing a degradation model for describing the change of the performance of the oxygen partial pressure sensor along with time; and performi