PROBLEM TO BE SOLVED: To provide a piezoelectric pump driving device capable of gaining an optimum output equal to self-excited method even upon other-excited method.SOLUTION: A piezoelectric pump driving device in which a piezoelectric pump is driven by applying a driving signal of which positive and negative are switched at a certain driving frequency includes: a memory for storing a characteristic table which expresses a correspondence relation of a driving voltage as an amplitude of the driving signal, a back pressure of the piezoelectric pump and a driving frequency to be applied to the piezoelectric pump in accordance with the driving voltage and the back pressure a pressure sensor which detects the back pressure of the piezoelectric pump a driving voltage gain part for gaining the driving voltage which is applied to the piezoelectric pump and a frequency setting part which refers to the characteristic table in accordance with the gained driving voltage and the detected back pressure and decides the driving frequency.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】他励振方式であっても自励振方式と同等の最適な出力を取得できる圧電ポンプ駆動装置を提供する。【解決手段】ある駆動周波数で正負が切り替わる駆動信号を圧電ポンプに印加して、該圧電ポンプを駆動する圧電ポンプ駆動装置であって、駆動信号の振幅である駆動電圧と、圧電ポンプの背圧と、駆動電圧と背圧とに応じて圧電ポンプに印加されるべき駆動周波数との対応関係を表す特性テーブルを格納するメモリと、圧電ポンプの背圧を検出する圧力センサと、圧電ポンプに印加されている駆動電圧を取得する駆動電圧取得部と、取得された駆動電圧及び検出された背圧に応じて特性テーブルを参照して駆動周波数を決定する周波数設定部とを備えた。【選択図】図3
