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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
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.
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公开(公告)号：US20230333025A1
公开(公告)日：2023-10-19
申请号：US18042685
申请日：2021-08-23
Applicant: SATAKE CORPORATION
Inventor： Tadashi MATSUSHITA , Takuya NISHIDA , Masaaki SADAMARU
CPC classification number: G01N21/85 , B07C5/3425 , B07C5/366
Abstract: An optical sorter includes a light source configured to irradiate a sorting target in transit on a conveyance route with light, an optical sensor configured to detect light emitted from the light source and associated with the sorting target, a determination portion configured to determine whether the sorting target is a foreign object and/or a defective product based on a signal acquired by the optical sensor with respect to the light associated with the sorting target, and at least one intermediate member disposed at a position located between the light source and the conveyance route in a direction in which the sorting target is irradiated with the light from the light source and located in such a manner that the intermediate member does not affect the detection of the light associated with the sorting target. The at least one intermediate member includes a reflection region on which the light emitted from the light source is reflected. The optical sensor is further configured to detect the light emitted from the light source and reflected on the reflection region.
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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
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.
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公开(公告)号：US20240418286A1
公开(公告)日：2024-12-19
申请号：US18701637
申请日：2022-10-21
Applicant: SATAKE CORPORATION , MECHANO TRANSFORMER CORPORATION
Inventor： Takafumi ITO , Tadashi MATSUSHITA , Sze Keat CHEE , Zhengli WANG
Abstract: A piezoelectric valve includes: actuators having valve discs and configured to drive these valve discs individually; a valve seat plate having valve seats contacted with and separated from the valve discs individually and discharge paths; and a body case accommodating the valve seat plate, and each actuator is fixed to the side face of the valve seat plate so that the valve discs face the valve seats and can be attached to and detached from a fluidic device via a connector part provided to the front face of the body case. The valve seats are provided as a pair to both faces of the valve seat part, the discharge paths opened in the valve seats provided as a pair are formed in the valve seat plate, gas discharge ports are opened in a non-straight manner, and discharge ports of discharge passages are opened in a line.
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Patent Agency Ranking
公开(公告)号：US20220356958A1
公开(公告)日：2022-11-10
申请号：US17622620
申请日：2020-02-28
Applicant: SATAKE CORPORATION , MECHANO TRANSFORMER CORPORATION
Inventor： Takafumi ITO , Tadashi MATSUSHITA , Toshiro HIGUCHI , Sze Keat CHEE , Yoshinobu MIZUNO , Toshitada HIRATA
Abstract: A piezoelectric valve includes: a valve main part including a gas pressure chamber receiving compressed gas supplied from outside; a plate inside the valve main part, and an actuator fixed to the plate and inside the valve main part, which is a case with an opening on a front surface. The plate includes a gas discharge path and a valve seat coming into contact with a valve element of the actuator opening and closing the gas discharge path. A lid member that closes the opening of the case has a gas discharge opening communicating with the gas discharge path of the plate; is welded and fixed to a front surface of the plate, where the gas discharge path opens, on an annular welded part surrounding the gas discharge opening; and is welded and fixed to an end surface of the case on an annular welded part on the outer peripheral part.
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6.发明申请公开(公告)号：US20220316617A1
公开(公告)日：2022-10-06
申请号：US17615653
申请日：2020-03-06
Applicant: SATAKE CORPORATION , MECHANO TRANSFORMER CORPORATION
Inventor： Takafumi ITO , Tadashi MATSUSHITA , Toshiro HIGUCHI , Sze Keat CHEE , Kunio EBIHARA , Toshitada HIRATA
Abstract: Provided is a piezoelectric actuator that can reduce a risk of air leakage due to weakening of pressing force of a valve element against a valve seat surface and airtightness. The piezoelectric actuator is used for a piezoelectric valve that opens and closes a valve utilizing displacement of a laminated piezoelectric element. The piezoelectric actuator includes: a valve element; a laminated piezoelectric element that generates a driving force, required for operation of the valve element, as a displacement; and a displacement enlargement mechanism that enlarges a displacement of a laminated piezoelectric element and causes the enlarged displacement to act on the valve element. In the piezoelectric actuator, a surface of the valve element to be in contact with a valve seat of the piezoelectric valve is made flat and smooth in a state in which a tensile load is applied to the laminated piezoelectric element.
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公开(公告)号：US20220297162A1
公开(公告)日：2022-09-22
申请号：US17638090
申请日：2020-04-13
Applicant: SATAKE CORPORATION
Inventor： Takafumi ITO , Tadashi MATSUSHITA , Masaaki SADAMARU
Abstract: To provide an optical grain sorter that can reduce the proportion of non-defective grains blown off collaterally, and even in a case in which a plurality of defective grains or the like fall down in a state overlapping each other, can blow off all the defective grains or the like.
The optical granular matter sorter includes a control unit configured to control an ejection time of a compressed gas from an air ejecting unit based on a result of detection obtained by an optical detecting unit, in which the control unit has a comparing unit configured to compare a defect detection time for an object to be sorted by the optical detecting unit and a single-granular matter passage set time set in advance, and a calculating unit configured to multiply the defect detection time by a predetermined coefficient based on a result of comparison obtained by the comparing unit to calculate the ejection time, and in a case in which the defect detection time is less than or equal to the single-granular matter passage set time as the result of comparison obtained by the comparing unit, the calculating unit multiplies the defect detection time by a small coefficient as compared to a case in which the defect detection time exceeds the single-granular matter passage set time to calculate the ejection time, and controls the ejection time of the compressed gas from the air ejecting unit based on a result of calculation.-
公开(公告)号：US20220213973A1
公开(公告)日：2022-07-07
申请号：US17605914
申请日：2020-01-22
Applicant: SATAKE CORPORATION , MECHANO TRANSFORMER CORPORATION
Inventor： Takafumi ITO , Tadashi MATSUSHITA , Toshiro HIGUCHI , Sze Keat CHEE , Yoshinobu MIZUNO
IPC: F16K31/00 , H01L41/053 , H01L41/083
Abstract: Provided is a piezoelectric valve in which the valve is opened/closed utilizing a displacement of a laminated piezoelectric element, including: a valve main body having a gas pressure chamber that receives compressed gas supplied externally; and an actuator having a valving element, the laminated piezoelectric element that generates a driving force required for operating the valving element as the displacement, and a displacement enlarging mechanism that enlarges the displacement of the laminated piezoelectric element to be acted on the valving element, the actuator being disposed in the valve main body, in which a surface of the laminated piezoelectric element is coated with silicone in a state in which the laminated piezoelectric element is integrated into the actuator.
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公开(公告)号：US20220373472A1
公开(公告)日：2022-11-24
申请号：US17781795
申请日：2020-12-14
Applicant: SATAKE CORPORATION
Inventor： Tomoyuki MIYAMOTO , Masaaki SADAMARU , Hiroaki TAKEUCHI , Tadashi MATSUSHITA
Abstract: An optical sorter includes a first light source disposed on a first side, a second light source disposed on a second side, an optical sensor configured to detect light during a plurality of scan periods including a first scan period and a second scan period, a determination part configured to determine a foreign object and/or a defective product, and a light source control part. The light source control part is configured to control the first light source and the second light source during the first scan period so as to turn on the first light source and/or the second light source in a first lighting pattern, which is a lighting pattern arbitrarily selected from a lighting pattern in which the first light source and the second light source are at least partially on, a lighting pattern in which only one of the first light source and the second light source is at least partially on, and a lighting pattern in which only the other of the first light source and the second light source is at least partially on, and is also configured to control the first light source and the second light source during the second scan period so as to turn on the first light source and/or the second light source in a second lighting pattern, which is a lighting pattern selected arbitrarily except for the first lighting pattern.
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