US 11,752,279 B2
Ultrasonic vibrator driving apparatus and mesh nebulizer
Masao Maeda, Kyoto (JP); and Hidetaka Togo, Kyoto (JP)
Assigned to OMRON HEALTHCARE CO., LTD., Kyoto (JP)
Filed by OMRON HEALTHCARE CO., LTD., Muko (JP)
Filed on Mar. 14, 2019, as Appl. No. 16/352,890.
Application 16/352,890 is a continuation of application No. PCT/JP2017/028911, filed on Aug. 9, 2017.
Claims priority of application No. 2016-188716 (JP), filed on Sep. 27, 2016.
Prior Publication US 2019/0209790 A1, Jul. 11, 2019
Int. Cl. A61M 11/00 (2006.01); B05B 17/06 (2006.01); B06B 1/02 (2006.01); B06B 1/06 (2006.01); B06B 3/00 (2006.01); A61M 15/00 (2006.01); B05B 17/00 (2006.01); B06B 3/02 (2006.01)
CPC A61M 11/005 (2013.01) [B05B 17/0623 (2013.01); B06B 1/0284 (2013.01); B06B 1/06 (2013.01); B06B 3/00 (2013.01); B06B 2201/76 (2013.01); B06B 2201/77 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An ultrasonic vibrator driving apparatus that operates 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 ultrasonic vibrator driving apparatus comprising:
a drive voltage generator to generate the drive voltage with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator; and
a sweep controller to repeatedly sweep the frequency of the drive voltage 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, and to associate and restrict the sweep period and the sweep width such that the sweep period and the sweep width fall within a predetermined allowed region on a two-dimensional map divided by the sweep period and the sweep width.