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NEBULIZER VIBRATING APERTURE PLATE DRIVE FREQUENCY CONTROL AND MONITORING
专利权人:
Stamford Devices Limited
发明人:
Joseph GREHAN,Niall SMITH
申请号:
US16572298
公开号:
US20200009332A1
申请日:
2019.09.16
申请国别(地区):
US
年份:
2020
代理人:
摘要:
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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