公开(公告)号：US20190353276A1

公开(公告)日：2019-11-21

申请号：US16479013

申请日：2017-12-25

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

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

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

Abstract: 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

Applicant: SATAKE CORPORATION ,  MECHANO TRANSFORMER CORPORATION

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

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

Abstract: 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：US20240261822A1

公开(公告)日：2024-08-08

申请号：US18566396

申请日：2022-03-30

Applicant: SATAKE CORPORATION

Inventor： Hiroaki TAKEUCHI ,  Hiroki ISHIZUKI ,  Tomoyuki MIYAMOTO ,  Hironori ARII

IPC: B07C5/342 ,  B07C5/36

CPC classification number: B07C5/3425 ,  B07C5/361 ,  B07C5/368 ,  B07C2501/0081

Abstract: Controller of an optical sorter is configured to receive an input of a candidate for a target quality condition regarding an allowable mix rate of defective products in sorting targets discharged from the optical sorter as acceptable products, receive an input of quality information indicating a mix rate of the defective products regarding at least a part of the sorting targets, simulate, based on the information, a sorting result regarding a quantity and/or a yield of the sorting targets discharged as the acceptable products that is expected to be acquired when sorting is conducted by a sorting device to achieve the candidate for the target quality condition and output a result of the simulation, receive an input of a final target quality condition to be employed when conducting the sorting, and conduct the sorting based on a sorting control parameter that allows the final target quality condition to be achieved.