公开(公告)号：US20190353276A1

公开(公告)日：2019-11-21

申请号：US16479013

申请日：2017-12-25

申请人： SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

发明人： Takafumi ITO ,  Hironori ARII ,  Tadashi MATSUSHITA ,  Sze Keat CHEE ,  Takeshi YANO

IPC分类号： F16K37/00 ,  H02N2/02 ,  H02N2/06 ,  B07C5/36 ,  F16K31/00 ,  G08B21/18

摘要： The piezoelectric actuator includes a piezoelectric element; a power supply applying a voltage to the piezoelectric element; a drive circuit that applies a voltage from the power supply to the piezoelectric element by a pulse charge signal and a discharge signal to charge, and discharges the charge charged in the piezoelectric element to drive the piezoelectric element; an abnormality detection circuit that detects an abnormality due to insulation failure of the piezoelectric element, and a control unit that determines whether or not the piezoelectric element is normal based on an abnormality detection signal. The abnormality detection circuit outputs the abnormality detection signal that detects a time corresponding to a period from when a current starts to flow to the piezoelectric element during charging to when a current stops to flow, and it is determined that the piezoelectric element is abnormal when the time is equal to or more than a set time.

公开(公告)号：US20190093784A1

公开(公告)日：2019-03-28

申请号：US16082664

申请日：2017-01-24

申请人： SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

发明人： Takafumi ITO ,  Hironori ARII ,  Tadashi MATSUSHITA ,  Sze Keat CHEE ,  Takeshi YANO ,  Toshiro HIGUCHI

IPC分类号： F16K31/02 ,  F16K31/44 ,  B07C5/342

摘要： A piezoelectric valve, having superior responsiveness during valve opening and capability to stabilize gas supply at an early stage, includes a gas pressure chamber receiving compressed gas and an exhaust path discharging the compressed gas from the gas pressure chamber; a valve disc placed in the gas pressure chamber to open and close the exhaust path; a piezoelectric element generating a driving force for operation of the valve disc, as a displacement; a displacement magnifying mechanism magnifying the displacement of the piezoelectric element and applying the magnified displacement to the valve disc; and driving means including a signal generator generating a signal including a first prepulse, a second prepulse, and a main pulse, applies a drive voltage to the piezoelectric element using the signal generated by the signal generator, as an input signal to a drive circuit, and drives and opens the valve disc by expanding the piezoelectric element.

公开(公告)号：US20130256200A1

公开(公告)日：2013-10-03

申请号：US13907629

申请日：2013-05-31

申请人： MECHANO TRANSFORMER CORPORATION ,  SATAKE CORPORATION

发明人： Takafumi ITO ,  Teruhiko TAKEUCHI ,  Takeshi YANO ,  Sze Keat CHEE ,  Toshiro HIGUCHI

IPC分类号： B07C5/36 ,  B07C5/342 ,  B07B4/02

CPC分类号： B07C5/366 ,  B07B4/02 ,  B07C5/3422 ,  B07C5/3425 ,  B07C5/365 ,  F16K31/004 ,  Y10S209/938

摘要： An optical granular material-sorting apparatus includes: a transfer means for transferring objects being sorted; an optical detection means for detecting, at a detection position, objects being sorted as they drop from an end of the transfer means; and a blasting means provided below the optical detection means and designed to blow away objects being sorted through blasting of air based on the result of detection by the optical detection means. The blasting means has a piezoelectric valve which is driven by a driving means to blast air based on the result of detection by the optical detection means. The driving means applies voltage to a piezoelectric element in multiple stages so as to suppress fluctuation in the amount of gas ejected from a gas release channel when the valve opens.

摘要翻译： 光学粒状材料分选装置包括：转印装置，用于转印被分类的物体; 光检测装置，用于在检测位置检测从所述传送装置的端部落下的物体; 以及设置在所述光学检测装置的下方的喷射装置，其被设计成基于所述光学检测装置的检测结果来吹扫被喷射的空气分类的物体。 爆破装置具有压电阀，其由驱动装置驱动，以根据光检测装置的检测结果来鼓风。 驱动装置以多级对压电元件施加电压，以便抑制当阀打开时从气体释放通道喷出的气体量的波动。