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US 12,485,241 B2Granted
Methods and apparatus for respiratory therapy
AssigneeResMed Pty Ltd
InventorEtienne Veschambre
Life of this patent
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AssigneeResMed Pty Ltd
InventorEtienne Veschambre
Estimating the term…
Methods and apparatus, such as a controller of a respiratory therapy device, generate a signal representing an estimate of flow rate of gas flow from the device. The respiratory therapy device may include a motor-operated blower. The method may include receiving in the controller, signals generated by a set of sensors, including measures of pressure and frequency (e.g., speed) of the motor. The controller may be configured to compute an entrained air density function and generate the estimate signal based on a function of the measures of pressure and frequency, and the entrained air density function. The entrained air density function may apply signals from additional sensors, such as atmospheric pressure, gas temperature, and ambient relative humidity, to compute atmospheric density. Control operations of the therapy device may then be based on the estimated signal, which may be applied to assess accuracy of a signal from a flow sensor.
A method of a controller for generating a signal representing an estimate of a flow rate of a flow of breathable gas associated with a respiratory therapy device, the respiratory therapy device comprising a motor-operated blower, the method comprising:
A respiratory therapy device comprising:
Dependencies are inferred from the claim text.