1 results about "Plethysmograph" patented technology

A method, apparatus, medium, product, and volume plethysmometer (1000) for determining a time constant are disclosed. The method includes: acquiring the leakage time of a leaking module at a preset opening degree, wherein the leakage time is the time when the leaking module releases gas from a target chamber at the preset opening degree, causing the gas pressure in the target chamber to reach a preset gas pressure threshold (S101); determining that the leakage time reaches a preset time interval; and determining the time constant of the target chamber based on the leakage time (S102). By employing a leaking module with an adjustable opening degree and acquiring the leakage time of the leaking module, the time constant is automatically calibrated based on the leakage time reaching the corresponding time interval and the leakage time at the corresponding opening degree. The entire time constant calibration process requires no manual intervention, improving the efficiency and accuracy of time constant calibration.