Joseph GREHAN,Michael CASEY,Shaun PORTER,Niall SMITH
申请号：
US15762387
公开号：
US20180256829A1
申请日:
2016.09.22
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A digital processor of a nebulizer controller controls and monitors drive current (I) applied to an aperture plate. The drive current is detected as a series of discrete values at each of multiple measuring points, each having a particular drive frequency The processor in real time calculates a slope or rate of change of drive current with frequency and additionally determines a minimum value for drive current leading up to the peak value. The processor uses both the value of the minimum drive current during the scan and also the maximum slope value to achieve reliable prediction of end of dose, when the aperture plate becomes dry.
