公开(公告)号：US20230384270A1

公开(公告)日：2023-11-30

申请号：US18191415

申请日：2023-03-28

Applicant: SHIMADZU CORPORATION

Inventor： Yutaka KURATANI ,  Shingo Masuda ,  Masaru Kozakura ,  Masahiro Kojima

IPC: G01N30/30

CPC classification number: G01N30/30 ,  G01N2030/025

Abstract: A gas chromatograph includes an oven that has a first heater device and a second heater device. The first heater device and the second heater device are connected in series when a voltage of a power supply is a first voltage, and are connected in parallel when the voltage of the power supply is a second voltage that is lower than the first voltage. A power controller includes a first control device that controls ON/OFF of supply of power to the series-connected first heater device and second heater device or ON/OFF of supply of power to the parallel-connected first heater device, and a second control device that controls ON/OFF of supply of power to the parallel-connected second heater device. A controller adjusts a duty ratio of supply of power to the parallel-connected first heater device and second heater device by controlling the first control device and the second control device when the voltage of the power supply is the second voltage.

公开(公告)号：US10761070B2

公开(公告)日：2020-09-01

申请号：US15854147

申请日：2017-12-26

Applicant: Shimadzu Corporation

Inventor： Shingo Masuda ,  Kiyonori Koga ,  Daiki Fukushima

IPC: G01N30/32 ,  G01N30/02

Abstract: A flow controller including a flow channel resistance disposed in a carrier gas supply flow channel, a control valve, pressure detecting portion 22 and a pressure difference detecting portion, a storage part storing a first calibration curve indicating a correlation between a pressure difference Δp and a total flow volume ftemp1 at the first set supply pressure Pin, ref1 and a second calibration curve indicating a correlation between a pressure difference Δp and the total flow volume ftemp2 at a second set supply pressure Pin,ref2 larger than the first set supply pressure Pin,ref1 is provided. A total flow volume f of the carrier gas is calculated based on the supply pressure pin detected by the pressure detecting portion, pressure difference Δp information detected by the pressure difference detecting portion, the first calibration curve and the second calibration curve.

公开(公告)号：US10386343B2

公开(公告)日：2019-08-20

申请号：US15815039

申请日：2017-11-16

Applicant: Shimadzu Corporation

Inventor： Shingo Masuda

IPC: B01D53/02 ,  G01N30/26 ,  G05D7/06 ,  G01N30/68 ,  G01N30/60 ,  G01N30/02

Abstract: When a flow rate of a carrier gas calculated by a column flow rate calculation unit is controlled to be a first flow rate, and when the flow rate of the carrier gas is controlled to be a second flow rate, the flow rates of the carrier gas are detected by a whole flow rate detection unit, and a gas leakage determination unit determines of leakage of the carrier gas on the basis of the rates. Since the flow rate of the carrier gas is changed and the detected value of the whole flow rate detection unit is used at different flow rates, a case can be discriminated where an offset occurs in the detected value of the whole flow rate detection unit and a case where leakage of the carrier gas occurs. Thus, it is satisfactorily determined the presence or absence of the leakage of the carrier gas.

公开(公告)号：US10794875B2

公开(公告)日：2020-10-06

申请号：US16199385

申请日：2018-11-26

Applicant: Shimadzu Corporation

Inventor： Shingo Masuda

IPC: G01N30/32 ,  G01N30/64 ,  G01N30/72 ,  G01N30/46 ,  G01N30/16 ,  G01N30/30 ,  G01N30/02

Abstract: A gas chromatograph, which may have a complex device configuration, capable of starting an analysis by replacing residual gas in a column with a carrier gas in starting up the gas chromatograph and by increasing the temperature of a column oven to an analytical initial temperature immediately after completion of the replacement.Upon command to start a gas chromatograph, a control unit calculates the average linear velocity of a carrier gas using a formula based on information such as the inner diameter and the length of a column, the column head pressure and the column outlet pressure, and the type of carrier gas, which are set as analytical conditions, and, for example, based on a detected temperature of a column oven and further calculates gas replacement necessary time from the average linear velocity and the length of the column. Based on the calculated time, a start time is determined.

公开(公告)号：US11047835B2

公开(公告)日：2021-06-29

申请号：US16335166

申请日：2016-10-11

Applicant: Shimadzu Corporation

Inventor： Yasuhiro Kimoto ,  Shingo Masuda

IPC: G01N30/40 ,  G01N30/32 ,  G01N30/86 ,  G01N30/12 ,  G01N30/64 ,  G01N30/26 ,  G01N30/02

Abstract: In a gas chromatograph 1, a back-pressure calculation processor 242 calculates a back pressure for a first detector. The pressure calculation processor 243 calculates a pressure of a carrier gas in a branching part. The back-flow determination processor 244 compares the pressure of the carrier gas in the branching part calculated by the pressure calculation processor 243 with the back pressure of the first detector calculated by the back-pressure calculation processor 242, and if the pressure of the carrier gas in the branching part is smaller than the back pressure of the first detector, the back-flow determination processor 244 determines that the carrier gas will flow back. It is therefore possible to surely know that there is a possibility that a back-flow of the carrier gas will occur, by checking the determination result of the back-flow determination processor 244.

公开(公告)号：US11921092B2

公开(公告)日：2024-03-05

申请号：US17510672

申请日：2021-10-26

Applicant: SHIMADZU CORPORATION

Inventor： Shori Kinoshita ,  Shinichi Yuki ,  Shingo Masuda ,  Yuki Komori ,  Daiki Fukushima

IPC: G01N30/24 ,  G01N1/14 ,  G01N35/10 ,  G06F3/041

CPC classification number: G01N30/24 ,  G01N1/14 ,  G01N35/1011 ,  G06F3/0412

Abstract: A vial supply system is provided with: a sampler configured to supply a vial to a predetermined supply destination by a transport arm; a management device communicatively connected to the sampler, the management device being configured to manage a supply operation of the vial by the sampler; and a display device provided so as to be able to communicate with the management device. When a teaching mode for performing teaching for setting a position of a transport arm at the time when a transport arm of the sampler transports the vial to and from the supply destination is started, the management device is configured to cause the display device to display an operation to be performed by a user in the teaching.

公开(公告)号：US11016065B2

公开(公告)日：2021-05-25

申请号：US16335166

申请日：2016-10-11

Applicant: Shimadzu Corporation

Inventor： Yasuhiro Kimoto ,  Shingo Masuda

IPC: G01N30/40 ,  G01N30/32 ,  G01N30/86 ,  G01N30/12 ,  G01N30/64 ,  G01N30/26 ,  G01N30/02

Abstract: In a gas chromatograph 1, a back-pressure calculation processor 242 calculates a back pressure for a first detector. The pressure calculation processor 243 calculates a pressure of a carrier gas in a branching part. The back-flow determination processor 244 compares the pressure of the carrier gas in the branching part calculated by the pressure calculation processor 243 with the back pressure of the first detector calculated by the back-pressure calculation processor 242, and if the pressure of the carrier gas in the branching part is smaller than the back pressure of the first detector, the back-flow determination processor 244 determines that the carrier gas will flow back. It is therefore possible to surely know that there is a possibility that a back-flow of the carrier gas will occur, by checking the determination result of the back-flow determination processor 244.