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|1. (WO2017154390) PIEZOELECTRIC VALVE, METHOD FOR DRIVING SAID PIEZOELECTRIC VALVE, AND OPTICAL PARTICULATE SORTER PROVIDED WITH AIR-BLOWING MEANS THAT USES SAID PIEZOELECTRIC VALVE|
MECHANO TRANSFORMER CORPORATION
CHEE Sze Keat
|Title:||PIEZOELECTRIC VALVE, METHOD FOR DRIVING SAID PIEZOELECTRIC VALVE, AND OPTICAL PARTICULATE SORTER PROVIDED WITH AIR-BLOWING MEANS THAT USES SAID PIEZOELECTRIC VALVE|
The purpose of the present invention is to provide a piezoelectric valve with excellent responsiveness during valve-opening and with which gas supply can be stabilized early. This piezoelectric valve, which has a gas pressure chamber for receiving a compressed gas that is supplied from the outside and a gas discharge path for discharging the compressed gas from the gas pressure chamber, is characterized in being provided with: a valve body, which is disposed in the gas pressure chamber and is for opening and closing the gas discharge path; a piezoelectric element for generating the driving force necessary for movement of the valve body as a displacement; a displacement-amplifying mechanism for amplifying the displacement of the piezoelectric element and causing same to act on the valve body; and a driving means, which has a signal-generating unit for generating a signal comprising a first pre-pulse, a second pre-pulse and a main pulse and which applies a driving voltage on the piezoelectric element using the signal generated by the signal-generating unit as an input signal to a driving circuit to elongate the piezoelectric element and drive the opening of the valve body.