Ultrasonic vibrator driving apparatus and mesh nebulizer
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United States of America Patent
Stats
-
Sep 12, 2023
Grant Date -
Jul 11, 2019
app pub date -
Mar 14, 2019
filing date -
Sep 27, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ultrasonic vibrator driving apparatus performs driving by applying an alternating voltage as a drive voltage to an ultrasonic vibrator that includes a piezoelectric element and has a unique resonance frequency. The drive voltage is generated with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator. The frequency of the drive voltage is repeatedly swept with a predetermined sweep width and a predetermined sweep period so as to include the resonance frequency, based on a reference frequency set according to the resonance frequency of the ultrasonic vibrator. The sweep period and the sweep width are restricted by being associated so as to fall within a predetermined allowed range on a two-dimensional map divided by the sweep period and the sweep width.
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