Liquid analyzer and liquid analysis system

Patent metadata

Field	Value
Publication number	US-2017322178-A1
Application number	US-201515529001-A
Country	US
Kind code	A1
Filing date	Nov 26, 2015
Priority date	Nov 26, 2014
Publication date	Nov 9, 2017
Grant date	—

Abstract

A liquid analyzer is one that performs analysis in a state of being immersed in a flowing analysis target liquid, and in order to simply make a good/bad determination and increase reliability, includes: a sensor adapted to, in a state where a responsive membrane is immersed in the flowing analysis target liquid, sense a predetermined component contained in the analysis target liquid; an analysis mechanism adapted to analyze the analysis target liquid with use of voltage generated in the sensor; and a resistance measurement mechanism adapted to, in the state where the responsive membrane is immersed in the flowing analysis target liquid, apply DC voltage to the responsive membrane to measure the resistance of the responsive membrane.

First claim

1 . A liquid analyzer that analyzes a flowing analysis target liquid, the liquid analyzer comprising:
a sensor adapted to, in a state where a responsive membrane is immersed in the flowing analysis target liquid, sense a predetermined component contained in the analysis target liquid; an analysis mechanism adapted to analyze the analysis target liquid with use of voltage generated in the sensor; and a resistance measurement mechanism adapted to, in the state where the responsive membrane is immersed in the flowing analysis target liquid, apply DC voltage to the responsive membrane to measure a resistance of the responsive membrane.

2 . The liquid analyzer according to claim 1 , wherein
after the resistance measurement mechanism has measured the resistance of the responsive membrane, a discharge period to discharge an electric charge supplied by the DC voltage applied to the responsive membrane is set.

3 . The liquid analyzer according to claim 1 , further comprising
a control part adapted to control the analysis mechanism and the resistance measurement mechanism, wherein the control part activates the resistance measurement mechanism in a state of stopping the analysis mechanism or keeping analysis result data indicating an analysis result of the analysis by the analysis mechanism, and when the discharge period has passed after stopping the resistance measurement mechanism, cancel the stop of the analysis mechanism or the keeping state.

4 . The liquid analyzer according to claim 1 , wherein
the resistance measurement mechanism measures the resistance of the responsive membrane multiple times a day.

5 . The liquid analyzer according to claim 1 , wherein
multiple sensors are provided, and at least one of them is in a state where a responsive membrane is not immersed in the flowing analysis target liquid, and the liquid analyzer further comprising a determination part adapted to determine whether the resistance of the responsive membrane is equal to or more than a predetermined threshold value, the resistance being measured by the resistance measurement mechanism; and a sensor switching mechanism adapted to, when the determination part determines that the resistance of the responsive membrane is equal to or more than the threshold value, change the sensor in the state where the responsive membrane is not immersed in the analysis target liquid into an immersed state.

6 . The liquid analyzer according to claim 1 , wherein
the responsive membrane has double membrane structure, and an outer membrane is configured to be peelable.

7 . A liquid analysis apparatus comprising:
the liquid analyzer according to claim 1 ; a liquid analyzer support part adapted to support the liquid analyzer so as to immerse a fore end part of the liquid analyzer in the analysis target liquid; a cleaning mechanism adapted to remove dirt attached to a part of the sensor, the part being immersed in the analysis target liquid; and a display part adapted to display a measurement value outputted from the liquid analyzer.

8 . A liquid analysis system comprising:
a liquid analysis apparatus that includes the liquid analyzer according to claim 1 , and at a first analysis site at which the analysis target liquid flows, analyzes the analysis target liquid in the state where the responsive membrane is immersed in the analysis target liquid; and an external device including a data acquisition part adapted to, at a second analysis site different from the first analysis site, acquire auxiliary analysis result data indicating a result of auxiliary analysis of the analysis target liquid, wherein it is configured to connect the liquid analysis apparatus and the external device through a network, and transmit the auxiliary analysis result data to the liquid analysis apparatus.

Assignees

• Tokyo Metropolitan Government
• Horiba Ltd
• Horiba Advanced Techno Co Ltd

Inventors

• Nakayama Akio
• Furuya Rumiko
• Ishii Akio
• Kaba Yasuto
• Ito Yuichi
• Yamauchi Susumu
• Murakami Hiroaki
• Senda Atsushi

Classifications

• G01N27/4161 Primary

  measuring the voltage and using a constant current supply, e.g. chronopotentiometry · CPC title

• G01N27/416 Primary

  Systems (G01N27/27 takes precedence) · CPC title