Nebulizer aperture plate drive frequency control and monitoring
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United States of America
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Jan 7, 2025
Grant Date -
Aug 10, 2023
app pub date -
Apr 21, 2023
filing date -
Apr 21, 2023
priority date (Note) -
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status (Latency Note)
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Abstract
A nebulizer has an aperture plate, a mounting, an actuator, and an aperture plate drive circuit (2-4). A controller measures an electrical drive parameter at each of a plurality of measuring points, each measuring point having a drive frequency; and based on the values of the parameter at the measuring points makes a determination of optimum drive frequency and also an end-of-dose prediction. The controller performs a short scan at regular sub-second intervals at which drive current is measured at two measuring points with different drive frequencies. According to drive parameter measurements at these points the controller determines if a full scan sweeping across a larger number of measuring points should be performed. The full scan provides the optimum drive frequency for the device and also an end of dose indication.
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