LIQUID FEED PUMP AND LIQUID FEED METHOD

To determine a disturbance without acquiring a control signal of an external device and to properly perform feedback control on a compression rate parameter.SOLUTION: A controller of a liquid feed pump calculates a first compression amount of a solvent by a first plunger in one drive cycle based on...

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Bibliographic Details
Main Authors KANAI DAISUKE, HARADA YUJI, SUGIYAMA MASUYUKI, KAWABE SHUNSUKE, TSUKADA NAGAHIRO
Format Patent
LanguageEnglish
Japanese
Published 31.10.2023
Subjects
BLASTING
HEATING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIGHTING
MEASURING
MECHANICAL ENGINEERING
PHYSICS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
TESTING
WEAPONS
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Summary:To determine a disturbance without acquiring a control signal of an external device and to properly perform feedback control on a compression rate parameter.SOLUTION: A controller of a liquid feed pump calculates a first compression amount of a solvent by a first plunger in one drive cycle based on a compression rate parameter, controls so that the first plunger compresses the solvent with the first compression amount in the one drive cycle. In the case where a value regarding a pressure value measured by a pressure sensor in the one drive cycle is smaller than a threshold value (S305:No, S311:No), the compression rate parameter is changed according to the value regarding the pressure value (S306, S312), and based on the compression rate parameter after change, a second compression amount of the solvent by the first plunger in the next drive cycle is calculated. In the case where a value regarding the pressure value in the one drive cycle is larger than the threshold value (S305:Yes, S311:Yes), based on the compression rate parameter, a third compression amount of the solvent by the first plunger in the next drive cycle is calculated.SELECTED DRAWING: Figure 3 【課題】外部装置の制御信号を取得せずに外乱を判定し、圧縮率パラメータを適切にフィードバック制御する。【解決手段】送液ポンプのコントローラは、圧縮率パラメータに基づいて、一の駆動周期における第１プランジャによる溶媒の第１圧縮量を計算し、一の駆動周期において第１プランジャが第１圧縮量で溶媒を圧縮するよう制御し、一の駆動周期において圧力センサで測定される圧力値に関する値が閾値より小さい場合（Ｓ３０５：Ｎｏ、Ｓ３１１：Ｎｏ）、圧力値に関する値に応じて圧縮率パラメータを変更し（Ｓ３０６、Ｓ３１２）、変更後の圧縮率パラメータに基づいて、次の駆動周期における第１プランジャによる溶媒の第２圧縮量を計算し、一の駆動周期において圧力値に関する値が閾値より大きい場合（Ｓ３０５：Ｙｅｓ、Ｓ３１１：Ｙｅｓ）、圧縮率パラメータに基づいて、次の駆動周期における第１プランジャによる溶媒の第３圧縮量を計算する。【選択図】図３
Bibliography:Application Number: JP20220068588