| 摘要 |
A high-precision frequency sweeping circuit for an ultrasonic atomization piece comprises a booster circuit and a frequency sweeping circuit. The booster circuit is electrically connected to the frequency sweeping circuit. Also provided is a frequency sweeping method based on a frequency sweeping circuit, comprising: inputting a fixed DC voltage and a fixed frequency to a booster circuit; inputting a frequency drive to the frequency sweeping circuit; recording a voltage value of a voltage feedback point of the booster circuit; additionally inputting a frequency to the frequency sweeping circuit; and recording a voltage value of the voltage feedback point of the booster circuit, determining whether the frequency input to the frequency sweeping circuit reaches a rated value, if so, stopping scanning and analyzing the recorded voltage value to find a central frequency of an atomization piece, otherwise, returning to the previous step. The high-precision frequency sweeping circuit for an ultrasonic atomization piece is applicable to frequency measurement and drive of various ultrasonic atomization pieces. Measurement does not need to be carried out on the basis of peaks of pulse signals, and therefore MHz-level frequency scanning can be performed for ultrasonic atomization pieces. It is unnecessary to perform discriminative compensation for different models of atomization pieces, and any ultrasonic atomization piece can be driven. |
