公开(公告)号：US20220128533A1

公开(公告)日：2022-04-28

申请号：US17438421

申请日：2019-10-16

Applicant: SHIMADZU CORPORATION

Inventor： Tomohiro GOMI ,  Daisuke KITABAYASHI ,  Shinya IMAMURA ,  Keisuke OGAWA ,  Masataka NIKKO ,  Masahide GUNJI

IPC: G01N30/86 ,  G01N30/32

Abstract: A liquid sending failure detector acquires periodically a liquid sending pressure of a liquid sending mechanism consecutively sends liquid using at least one plunger pump that sends liquid by reciprocally driving a plunger such that a fluctuation is read in one driving period of the liquid sending mechanism, and detect a liquid sending failure of the liquid sending mechanism using an acquired liquid sending pressure. The liquid sending failure detector executes a pulsation detection step of obtaining a fluctuation range of the liquid sending pressure in a certain driving period of the liquid sending mechanism and detecting pulsation on a condition that a count of consecutive periods in which the fluctuation range exceeds a predetermined reference value exceeds a predetermined reference count, and a liquid sending failure detection step of detecting a liquid sending failure of the liquid sending mechanism when the pulsation is detected in the pulsation detection step.

公开(公告)号：US20160234904A1

公开(公告)日：2016-08-11

申请号：US15015810

申请日：2016-02-04

Applicant: SHIMADZU CORPORATION

Inventor： Yusuke NAGAI ,  Keisuke OGAWA ,  Masato WATANABE ,  Kumiko JINGU ,  Masanori FUJIWARA ,  Tomoyuki YAMAZAKI

IPC: H05B33/08 ,  G01N21/33

CPC classification number: H05B33/0851 ,  G01N21/33 ,  G01N2201/0621 ,  G01N2201/0638 ,  G01N2201/0692 ,  G01N2201/0695

Abstract: Provided is an optical analyzer for performing a feedback control on the amount of light emitted from an LED as a light source, in which the configuration of an optical system is made simple and the degree of freedom in optical system arrangement is secured. An optical member 2 for focusing most of light while discharging part of the light as unfocused light is provided on an optical path from a light casting unit 1 to a sample cell 3. The optical member 2 can be achieved with a simple configuration, for example, two ball lenses spaced apart by a predetermined distance from each other. The light focused by the optical member 2 is cast as measurement light into the sample cell 3. Meanwhile, a second photodetector 5 is arranged at a position where the unfocused light reaches. The second photodetector 5 generates a detection signal in accordance with the amount of light that has entered the second photodetector 5 as monitored light, and a drive current to be supplied to an LED is controlled through a drive current controlling unit 6 and a current source 7 such that the amount of light is maintained at a fixed level.

Abstract translation: 提供了一种用于对从光源发出的光量进行反馈控制的光学分析器，其中光学系统的结构简单且光学系统布置的自由度得到确保。 在从光铸造单元1到样品池3的光路上设置有用于聚焦大部分光的光学构件2，同时以未聚焦的光排出部分光。光学构件2可以以简单的构造实现，例如 ，彼此隔开预定距离的两个球透镜。 将由光学构件2聚焦的光作为测量光铸造到样品池3中。同时，第二光电检测器5布置在未聚焦的光到达的位置。 第二光电检测器5根据作为监视光进入第二光电检测器5的光量产生检测信号，通过驱动电流控制单元6和电流源7控制提供给LED的驱动电流 使得光量保持在固定的水平。