JP-7857051-B1 - Sensor calibration device, sensor calibration system, sensor calibration method, and sensor calibration program

JP7857051B1JP 7857051 B1JP7857051 B1JP 7857051B1JP-7857051-B1

Abstract

[Problem] The objective is to provide a sensor calibration device, sensor calibration system, sensor calibration method, and sensor calibration program that can calibrate water quality sensors in water treatment systems at low cost and automatically or autonomously. [Solution] The control device 100, which serves as a sensor calibration device, is equipped with a processor. The processor sends a second treated water downstream of the first treated water that the water quality sensor detects to a first water quality sensor 161, which serves as a water quality sensor for detecting the water quality of the treated water of the water treatment system 20, and calibrates the water quality sensor using the second treated water that has been sent out. [Selection Diagram] Figure 2

Inventors

ラドジンスキテオ
キルゼンブラトロマン

Assignees

ＷＯＴＡ株式会社

Dates

Publication Date: 20260512
Application Date: 20251205

Claims (8)

Equipped with a processor, The aforementioned processor, To the first water quality sensor that detects the water quality of the first treated water in a water treatment system, the second treated water, which is downstream of the first treated water targeted by the first water quality sensor, is supplied . The first water quality sensor is calibrated using the second treated water that has been discharged . The aforementioned processor, The water quality of the second treated water is obtained, calculated based on the measurement results of the second water quality sensor that detects the water quality of the second treated water. When the water quality of the second treated water is above a predetermined threshold that represents water quality suitable for calibration of the first water quality sensor, the second treated water is sent to the first water quality sensor. Sensor calibration device.
The aforementioned first treated water is the inflow water at the inflow stage, The aforementioned second treated water is treated water that has already been treated. The sensor calibration apparatus according to claim 1.
The water treatment system includes multiple treatment stages related to water treatment, The aforementioned first treated water is treated water from a predetermined treatment stage related to water treatment, The second treated water is treated water from a treatment stage downstream of the predetermined treatment stage. The sensor calibration apparatus according to claim 1.
The first water quality sensor and the second water quality sensor are optical sensors. The sensor calibration apparatus according to claim 1.
A first water quality sensor for detecting the water quality of the first treated water, A sensor calibration device according to any one of claims 1 to 4 , Equipped with, Sensor calibration system.
The system includes a second water quality sensor for detecting the water quality of the second treated water, The sensor calibration system according to claim 5 .
To the first water quality sensor that detects the water quality of the first treated water in a water treatment system, the second treated water, which is downstream of the first treated water targeted by the first water quality sensor, is supplied . The first water quality sensor is calibrated using the second treated water that has been discharged. The water quality of the second treated water is obtained, calculated based on the measurement results of the second water quality sensor that detects the water quality of the second treated water. When the water quality of the second treated water is above a predetermined threshold that represents water quality suitable for calibration of the first water quality sensor, the second treated water is sent to the first water quality sensor. A sensor calibration method in which a computer performs the processing.
To the first water quality sensor that detects the water quality of the first treated water in a water treatment system, the second treated water, which is downstream of the first treated water targeted by the first water quality sensor, is supplied . The first water quality sensor is calibrated using the second treated water that has been discharged. The water quality of the second treated water is obtained, calculated based on the measurement results of the second water quality sensor that detects the water quality of the second treated water. When the water quality of the second treated water is above a predetermined threshold that represents water quality suitable for calibration of the first water quality sensor, the second treated water is sent to the first water quality sensor. A sensor calibration program to allow a computer to perform a process.

Description

This disclosure relates to a sensor calibration device, a sensor calibration system, a sensor calibration method, and a sensor calibration program. Patent Document 1 discloses a zero calibration method for a water quality measuring device that generates zero-calibrated water using a filter or the like, ensuring reliable zero calibration. This zero calibration method involves providing a zero-calibrated water generation path in parallel with the normal water flow path connecting the water source and the detection unit (measuring cell). A zero-calibrated water generation filter and a three-way valve are inserted into this zero-calibrated water generation path. A light-emitting element and a light-receiving element for detecting transmitted light are positioned opposite each other, flanking the drainage path connecting the three-way valve and the drainage tank. The zero calibration value is defined as the point at which the difference between the amount of light received when zero-calibrated water is first passed through the zero-calibrated water generation path and the drainage path and the amount of light received during normal water flow becomes small. Japanese Patent Application Publication No. 9-288054 This figure shows the schematic configuration of the sensor calibration system of this embodiment.This block diagram shows a schematic configuration of the water treatment system according to this embodiment.This is a block diagram showing an example of the hardware configuration of the control device according to this embodiment.A block diagram showing an example of the functional configuration of the control device according to this embodiment.This flowchart shows an example of the calibration process according to this embodiment.This graph shows an example of the criteria for judgment based on water quality scores according to this embodiment. The sensor calibration system 10 according to this embodiment will be described below with reference to the drawings. In each drawing, identical or equivalent components and parts are given the same reference numerals. Furthermore, the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from actual ratios. This disclosure is not limited in any way to the following embodiments, and can be implemented with appropriate modifications within the scope of the purpose of this disclosure. <Overview of this Circumstance> Generally, it is considered difficult to measure the water quality of influent water flowing into a water treatment system using water quality sensors. One reason for this is that contaminated influent water contaminates the water quality sensors very quickly. Essentially, it was difficult to accurately measure the water quality of the influent water without cleaning and calibrating the water quality sensor immediately before measuring it. Another contributing factor is the deterioration of water quality sensors over time. "Deterioration" here refers to deterioration due to dirt, scratches, wear, etc., as well as deterioration due to aging and use. For example, in the case of optical sensors, deterioration includes a decrease in the light emission intensity of the light source and dirt on the surface of the light-receiving part. Therefore, the sensor calibration system 10 of this embodiment sends treated water from downstream of the water treatment system back to upstream of the water treatment system and uses this treated water to calibrate the water quality sensor located upstream of the water treatment system. Calibration of the water quality sensor is performed, for example, by updating the reference signal intensity. In this embodiment, the treated water includes inflow water into the water treatment system, water undergoing treatment in the water treatment system, and water that has already been treated in the water treatment system. For example, if the water quality sensor is an optical sensor, the water quality of the water being measured is calculated based on its absorbance. The absorbance of the water being measured can be calculated, as an example, using the following formula (1). In the following, the underscore "_" will be used to indicate variables in the equations. For example, "A_sample" represents the left-hand side of equation (1) above, and everything after "_" is a subscript. In equation (1), "I_dark" is the signal intensity when light is blocked. "I_sample" is the signal intensity of the water being measured. "I_2" is the signal intensity of the reference water. Calibration of the water quality sensor is performed, for example, by updating "I_2" using the signal intensity of the treated water downstream of the water treatment system. Therefore, according to the sensor calibration system 10 of this embodiment, the effects of water quality sensor degradation can be suppressed by relatively calibrating the upstream water quality sensor using the treated water downstream of the water treatment system