Calibration method for oxygen sensor, medical ventilation system, anesthetic machine, and ventilator

A calibration method for an oxygen sensor electrically connected to a gas control device of a medical ventilation system, comprising:

• detecting, by a detection circuit connected to the oxygen sensor, at least two electrical signals, which are correspondingly outputted by the oxygen sensor at at least two time points within a preset time period, when the oxygen sensor is in a preset oxygen concentration;
• determining a response function of the oxygen sensor which corresponds to the preset oxygen concentration, according to the at least two time points and the at least two electrical signals, wherein the response function represents a relationship between the electrical signals outputted by the oxygen sensor and the time points;
• determining a steady-state output value of the oxygen sensor in the preset oxygen concentration, according to the response function;
• determining a characteristic curve of the oxygen sensor, according to the steady-state output value of the oxygen sensor in the preset oxygen concentration;
• and
• controlling, by the gas control device, a gas supply in the medical ventilation system according to an actual oxygen concentration determined based on the characteristic curve of the oxygen sensor.