Concentration measurement method, concentration measurement program, concentration measurement system, and concentration measurement device

Patent metadata

Field	Value
Publication number	US-10274454-B2
Application number	US-201715432240-A
Country	US
Kind code	B2
Filing date	Feb 14, 2017
Priority date	Feb 15, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

To measure target component concentration in a liquid with higher accuracy without any dedicated apparatus or skill, a method is adapted to include: receiving a successive measurement value obtained by performing successive measurement of the target component concentration with use of a first measurement device immersed in the liquid; receiving a batch measurement value obtained by, with use of a second measurement device, performing batch measurement of the target component concentration in a part sampled from the liquid; and, when the batch measurement value is received, successively calculating a correlation value indicating the correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement. In addition, the first measurement device is adapted to calculate the target component concentration or correct a successive measurement value with use of the latest correlation value.

First claim

The invention claimed is:

1. A concentration measurement method for measuring target component concentration in a liquid, the method comprising:
a first reception step of receiving a successive measurement value obtained by performing successive measurement of the target component concentration with use of a first measurement device of which a sensor part is immersed in the liquid;
a second reception step of receiving a batch measurement value obtained by performing batch measurement of the target component concentration in a part sampled from the liquid, with use of a second measurement device different from the first measurement device; and
a correlation expression calculation step of sequentially calculating, upon receipt of batch measurement value in the second reception step, a correlation expression indicating a correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement, wherein
the first measurement device calculates the target component concentration with use of the correlation expression or corrects the successive measurement value with use of the correlation expression; and
the correlation expression includes a correlation value which is calculated during the correlation expression calculation step.

2. The concentration measurement method according to claim 1 , further comprising:
a successive measurement value storage step of storing the successive measurement value received in the first reception step; and
a batch measurement value storage step of storing the batch measurement value received in the second reception step, wherein
in the correlation expression calculation step, the correlation expression is calculated on a basis of multiple batch measurement values, and respectively corresponding multiple successive measurement values, from among stored batch measurement values and stored successive measurement values, wherein
the multiple batch measurement values are selected from a predetermined number of batch measurement values that include the latest obtained batch measurement value and the batch measurement value immediately preceding the latest batch measurement value.

3. An apparatus comprising: a processor, and a memory storing software modules of a concentration measurement program used to measure target component concentration in a liquid, the software modules to be executed by the processor, the software modules comprising:
a first reception part adapted to receive a successive measurement value obtained by performing successive measurement of the target component concentration with use of a first measurement device of which a sensor part is immersed in the liquid;
a second reception part adapted to receive a batch measurement value obtained by performing batch measurement of the target component concentration in a part sampled from the liquid, with use of a second measurement device different from the first measurement device;
a correlation expression calculation part adapted to sequentially calculate, upon receipt of batch measurement value by the second reception part, a correlation expression indicating a correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement, and
a correlation expression transmitting part adapted to transmit the correlation expression to the first measurement device or a correction part adapted to correct a successive measurement value received by the first reception part with use of the correlation expression.

4. A concentration measurement system that measures target component concentration in a liquid, the system comprising:
a first measurement device adapted to perform successive measurement of the target component concentration with a sensor part immersed in the liquid; and
an information processing device adapted to transmit and receive data with the first measurement device, wherein
the information processing device has:
a first reception part adapted to receive a successive measurement value obtained by performing successive measurement of the target component concentration with use of the first measurement device;
a second reception part adapted to receive a batch measurement value obtained by performing batch measurement of the target component concentration in a part sampled from the liquid, with use of a second measurement device different from the first measurement device;
a correlation expression calculation part adapted to sequentially calculate, upon receipt of batch measurement value by the second reception part, a correlation expression indicating a correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement, the correlation expression including a correlation value which is calculated by the correlation expression calculation part; and
a correlation expression transmitting part adapted to transmit the correlation expression to the first measurement device or a correction part adapted to correct a successive measurement value received by the first reception part with use of the correlation expression.

5. The concentration measurement system according to claim 4 , wherein
the information processing device has:
an analysis parameter reception part adapted to acquire an analysis parameter different from the target component concentration; and
an abnormality sensing part adapted to sense abnormality of the first measurement device on a basis of the analysis parameter.

6. The concentration measurement system according to claim 4 , wherein
the information processing device further has a maintenance informing part adapted to acquire the correlation value, or the successive measurement value and the batch measurement value as well as on a basis of the correlation value, or the successive measurement values and the batch measurement values, outputting an informing signal prompting maintenance of the first measurement device.

7. The concentration measurement system according to claim 4 , wherein
the correlation expression calculation part calculates the correlation expression with additional use of a preliminarily inputted temporary batch measurement value and a temporary successive measurement value preliminarily inputted as a successive measurement value corresponding to the temporary batch measurement value.

8. A concentration measurement device that performs successive measurement of target component concentration in a liquid with a sensor part immersed in the liquid, the concentration measurement device having:
a reception part adapted to receive a batch measurement value obtained by performing batch measurement of the target component concentration in a part sampled from the liquid, with use of a second measurement device different from the concentration measurement device;
a correlation expression calculation part adapted to sequentially calculate, upon receipt of batch measurement value by the reception part, a correlation expression indicating a correlation between multiple successive measurement values and multiple batch measurement values respectively obtained in mutually corresponding multiple times of successive measurement and multiple times of batch measurement; and
a concentration calculation part adapted to calculate the target component concentration with use of the correlation expression, wherein
the correlation expression includes a correlation value which is calcula

Assignees

• Horiba Ltd
• Horiba Advanced Techno Co Ltd

Inventors

• Nakayama Akio
• Furuya Rumiko
• Ito Yuichi
• Ishii Akio
• Gyoten Yuji
• Ando Yoshitake
• Murakami Hiroaki

Classifications

• C02F2101/16

  Nitrogen compounds, e.g. ammonia · CPC title

• G01N27/3274

  Corrective measures, e.g. error detection, compensation for temperature or hematocrit, calibration (coding of calibration information G01N33/48771) · CPC title

• C02F2209/006

  comprising a software program or a logic diagram · CPC title

• C02F2209/005

  Processes using a programmable logic controller [PLC] · CPC title

• C02F2209/14

  NH3-N · CPC title