JP7451751B2 - Analysis system, management system, analysis method, and analysis program - Google Patents

Description

The present disclosure relates to an analysis system, a management system, an analysis method, and an analysis program.

For example, in the production of aircraft parts, surface treatments such as etching and film treatment using treatment liquids are performed. The properties of the treatment liquid are controlled so that the desired surface treatment is performed. For example, a liquid quality test is performed by manually analyzing a sample of the processing liquid periodically (once a week, etc.) by a worker or the like.

Patent Document 1 discloses that an etching solution (HF solution) is supplied from a processing tank to a concentration measuring device via a pipe, and the concentration value is detected.

Japanese Patent Application Publication No. 7-306146

The properties (for example, concentration) of the processing liquid may change rapidly depending on the number of parts to be processed, the material of the product, etc. For example, pH and electrical conductivity tend to change due to the effects of impurities and dissolved components in the atmosphere. If the liquid properties of the processing liquid are not maintained appropriately, the treated product may become non-conforming (defective), so it is becoming increasingly important to control the liquid properties of the processing liquid more accurately.

Since a pH meter is a device that needs to be calibrated regularly, the calibration is performed manually by a worker or the like. For this reason, it took time and effort to periodically calibrate the pH meter in order to manage the liquid properties of the processing liquid.

The present disclosure has been made in view of these circumstances, and aims to provide an analysis system, a management system, an analysis method, and an analysis program that can reduce the labor of calibrating a pH meter. do.

A first aspect of the present disclosure includes a pH meter that measures the pH of a sample, a tank storing a calibration solution having a predetermined pH value, and supplying the calibration solution from the tank to the pH meter at a predetermined timing, A control device that calibrates the pH meter while the calibration solution is being supplied to the pH meter, an electrical conductivity meter that measures the electrical conductivity of the sample, and the electrical conductivity meter in the sample distribution path. and an intermediate tank for storing the sample, the pH meter being provided downstream of the electrical conductivity meter in the sample flow path, and the control device is an analysis system that distributes the sample to the distribution channel when performing measurement on the sample .

A second aspect of the present disclosure includes an electrical conductivity meter that measures the electrical conductivity of a sample, and a pH meter that is provided downstream of the electrical conductivity meter in the distribution path of the sample and that measures the pH of the sample. , an analysis method for an analysis system comprising an intermediate tank provided between the electrical conductivity meter and the pH meter in the distribution path of the sample and storing the sample , when measuring the sample; , an analysis method comprising the step of distributing the sample to the distribution channel .

A third aspect of the present disclosure includes an electrical conductivity meter that measures the electrical conductivity of a sample, and a pH meter that is provided downstream of the electrical conductivity meter in the distribution path of the sample and that measures the pH of the sample. , an analysis program for an analysis system including an intermediate tank provided between the electrical conductivity meter and the pH meter in the sample distribution path and storing the sample , when performing measurement on the sample. , an analysis program for causing a computer to execute a process of distributing the sample to the distribution channel .

According to the present disclosure, it is possible to reduce the effort required to calibrate a pH meter.

FIG. 1 is a diagram illustrating a configuration example of a surface treatment line according to a first embodiment of the present disclosure. 1 is a diagram illustrating a configuration example when an analysis system is applied to a processing tank according to a first embodiment of the present disclosure. 1 is a diagram showing a schematic configuration of an analysis system according to a first embodiment of the present disclosure. FIG. 2 is a diagram for explaining the glass electrode method. FIG. 1 is a diagram showing an example of the hardware configuration of a control device according to a first embodiment of the present disclosure. FIG. 2 is a functional block diagram showing functions included in a control device according to a first embodiment of the present disclosure. FIG. 2 is a diagram showing the flow of a sample in the analysis system when performing analysis according to the first embodiment of the present disclosure. FIG. 3 is a diagram showing the flow of a calibration solution in the analysis system when performing calibration according to the first embodiment of the present disclosure. FIG. 2 is a diagram showing the flow of pure water in the analysis system when performing cleaning according to the first embodiment of the present disclosure. 3 is a flowchart illustrating an example of a procedure of a calibration process according to the first embodiment of the present disclosure. It is a flowchart which shows an example of the procedure of cleaning processing concerning a 1st embodiment of this indication. FIG. 2 is a diagram illustrating a configuration example of a management system according to a second embodiment of the present disclosure. FIG. 7 is a diagram illustrating a configuration example when a management system according to a second embodiment of the present disclosure is applied to a production line.

[First embodiment]
Below, a first embodiment of an analysis system, a management system, an analysis method, and an analysis program according to the present disclosure will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of the configuration of the surface treatment line 120. The surface treatment line 120 is provided with a treatment tank 122 in which a plurality of treatment liquids are stored. For example, as shown in FIG. 1, the surface treatment line 120 is provided with treatment tanks 122 such as a boric acid/sulfuric acid treatment tank 122a, a primary water washing treatment tank 122b, and a secondary water washing processing tank 122c. A crane 121 is provided above the processing tank 122, and the crane 121 suspends the target part 123, and immerses the target part 123 in the processing liquid in the processing tank 122 by vertical movement. Each surface treatment is performed by immersing the target part 123 in each treatment liquid in order from the upstream side of the line.

A film treatment is performed in the boric acid/sulfuric acid treatment tank 122a. In the primary water washing treatment tank 122b and the secondary water washing treatment tank 122c, the target component 123 after the film treatment is subjected to primary water washing and secondary water washing. Pure water is stored in the primary washing tank 122b and the secondary washing tank 122c. Since the amount of pure water stored decreases due to evaporation or the like, pure water is replenished from a pure water line (not shown).

In this embodiment, a case will be described in which pure water stored in the primary water washing tank 122b (or the secondary washing tank 122c) is used as a liquid analysis target (hereinafter referred to as a "sample"). The sample may be pure water supplied from a pure water line. Moreover, even if it is not pure water, it is possible to use various solutions as a sample, such as the processing liquid in the boric acid/sulfuric acid processing tank 122a.

FIG. 2 is a diagram showing a configuration example when the analysis system 40 is applied to the processing tank 122. The processing tank 122 in FIG. 2 is, for example, a primary water washing processing tank 122b. A circulation system 130 and an analysis system 40 are connected to the processing tank 122 .

The circulation system 130 extracts a portion of the processing liquid from the processing tank 122 using a pump 131 and returns the processing liquid to the processing tank 122 via a circulation line 133 . On the downstream side of the pump 131 in the circulation line 133 , a part of the processing liquid in the circulation line 133 flows through a detour line 134 , solid components are removed by a strainer 132 , and the liquid returns to the circulation line 133 . A sampling line 135 is connected to the detour line 134 on the downstream side of the strainer 132 .

The analysis system 40 collects the treated liquid as a sample from the collection line 135 and performs analysis. In this embodiment, a case will be described in which the pH and electrical conductivity of the treatment liquid are measured (analyzed), but either one of the pH and electrical conductivity may be measured.

FIG. 3 is a diagram showing a schematic configuration of the analysis system 40. As shown in FIG. 3, the analysis system 40 includes an electrical conductivity meter M1, an intermediate tank C2, a pH meter M2, a pure water tank T2, calibration liquid tanks (T3 to T5), and a control device 50. The main components are:

The electrical conductivity meter M1 measures the electrical conductivity of the sample. Specifically, the collection line 135 is connected to the analysis system sample inlet, and the sample is supplied from the sample inlet to the EC tank C1 via the line L1. The line L1 is provided with an inlet valve V1 and a valve SV1, which are controlled by a control device 50, which will be described later. Then, the sample is temporarily stored in the EC tank C1. When a predetermined amount or more of the sample is stored in the EC tank C1, the surplus flows out to the line L2.

The electrode of the electrical conductivity meter M1 is immersed in the sample stored in the EC tank C1, and the electrical conductivity of the sample is measured. The electrode of the electrical conductivity meter M1 is, for example, a platinum electrode. Since the sample is automatically supplied to the electrical conductivity meter M1 by the control device 50 described later, it becomes possible to perform online measurement of electrical conductivity. Note that the method for measuring electrical conductivity is not limited to the glass electrode (platinum electrode cell) method, and various methods can be used.

A line L7 having a valve SV2 at the bottom of the tank is connected to the EC tank C1, and the stored sample etc. can be discharged to the wastewater pit E1.

Intermediate tank C2 stores the sample supplied from line L2. A predetermined amount of sample is stored in the intermediate tank C2, and the surplus is discharged to the wastewater pit E1 via the line L5. The sample stored in the intermediate tank C2 is supplied to the pH tank C3 via the line L3. A valve SV4 is provided in the line L3. Further, a line L8 having a valve SV9 is provided between the pH tank C3 and the valve SV4 in the line L3, and the sample in the line L3 can be supplied to the waste liquid tank T1.

That is, the intermediate tank C2 is provided between the electrical conductivity meter M1 and the pH meter M2 in the distribution path through which the sample flows. In other words, the intermediate tank C2 is provided downstream of the electrical conductivity meter M1 and upstream of the pH meter M2 with respect to the flow of the sample. By providing an intermediate tank C2 for storing a sample between the electrical conductivity meter M1 and the pH meter M2, even if the sample is charged during electrical conductivity measurement, it can be discharged before measuring the pH meter M2. Therefore, it becomes possible to perform pH meter M2 measurement more accurately.

It is preferable that the sample is retained in the intermediate tank C2 for a predetermined period of time or more. The predetermined time is set, for example, based on the time required for electrical charges accumulated in measurement of electrical conductivity to be discharged. That is, by allowing the sample to stay for a predetermined period of time or longer, the sample can be more reliably discharged. The residence time in the intermediate tank C2 may be adjusted by the structure (capacity, etc.) of the tank, or may be adjusted by controlling the sample supplied to the pH meter M2 by controlling the pump P1.

A line L6 having a valve SV3 at the bottom of the tank is connected to the intermediate tank C2, so that the stored sample etc. can be discharged to the wastewater pit E1.

The pH meter M2 measures the pH of the sample. Specifically, the sample is supplied from the intermediate tank C2 to the pH tank C3 via the line L3. Then, the sample is stored in the pH tank C3, and is discharged to the waste liquid tank T1 via the line L4. A pump P1 is provided in the line L4, and by controlling the pump P1, the sample is distributed from the intermediate tank C2 to the pH tank C3 and then to the waste liquid tank T1.

The pH meter M2 measures pH using a glass electrode method using an internal comparison liquid. FIG. 4 is a diagram for explaining the glass electrode method. Two electrodes are used: a glass electrode Z1 and a comparison electrode Z2. Glass electrode Z1 and reference electrode Z2 are immersed in the sample. The lower part of the glass electrode Z1 is composed of a glass thin film Z3, and the glass electrode Z1 is filled with a glass electrode internal liquid whose pH is known. If there is a difference in pH between the glass electrode internal solution and the sample in which the glass electrode Z1 is immersed, a potential difference proportional to the difference is generated in the glass thin film Z3. That is, potentials are generated on the glass electrode internal liquid side and the sample side in the glass thin film Z3, respectively. The potential generated on the internal liquid side of the glass electrode is measured by the internal electrode Z4 of the glass electrode Z1, and the potential generated on the sample side is measured by the internal electrode Z6 of the comparison electrode Z2 to obtain a potential difference. Since the potential difference is proportional to the difference in pH between the glass electrode internal solution, which has a known pH, and the sample, the pH of the sample can be determined from the potential difference. Note that the glass electrode Z1 and the comparison electrode Z2 may be configured as a composite electrode, and the specific electrode configuration using the glass electrode method is not limited to that shown in FIG. 4.

The lower part of the comparison electrode Z2 is a liquid junction Z5, and the internal comparison liquid (internal comparison liquid) slightly flows out to the sample side to maintain electrical connection. Therefore, the internal comparison liquid in the comparison electrode Z2 decreases. The internal comparison liquid is automatically replenished by a control device 50, which will be described later. KCl (saturated aqueous potassium chloride solution) is used as the internal comparison liquid. The internal comparison liquid is an electrolyte solution.

The pH meter M2 is provided downstream of the electrical conductivity meter M1 in the sample flow path. When measuring the sample, the control device 50 causes the sample to flow through the distribution channel. When measuring electrical conductivity, it is difficult for impurities to get mixed into the sample, but when measuring pH, impurities such as a comparison liquid (KCl, etc.) may get mixed into the sample. Therefore, by measuring the pH after the electrical conductivity, continuous measurement of the electrical conductivity and pH becomes possible more accurately.

The pure water tank T2 is a tank that stores pure water. Pure water tank T2 is connected to line L8 via line L9 having valve SV5. Further, a line L13 having a pump P2 is connected between the pure water tank T2 and the valve SV5, so that pure water can be supplied to the EC tank C1. In the analysis system 40, for example, cleaning is performed using pure water. For example, it is possible to clean the pH meter M2, the pH tank C3, the electrical conductivity meter M1, the EC tank C1, the intermediate tank C2, and various piping.

The calibration liquid tanks (T3 to T5) store calibration liquid for configuring the pH meter M2. The calibration solution has a predetermined pH value. In this embodiment, a case will be described in which a tank T3, a tank T4, and a tank T5 are provided as calibration liquid tanks (T3 to T5) corresponding to a plurality of calibration liquids having different pH values, respectively. One type of calibration solution may be used. However, by providing a plurality of calibration solutions with different pH values, calibration can be performed corresponding to a plurality of pH values, and the pH meter M2 can be calibrated with high accuracy.

A calibration solution having a pH of 4 is stored in the tank T3. The tank T3 is connected to the line L8 via a line L10 having a valve SV6. A calibration solution with a pH of 7 is stored in the tank T4. The tank T4 is connected to the line L8 via a line L11 having a valve SV7. A calibration solution with a pH of 9 is stored in the tank T5. The tank T5 is connected to the line L8 via a line L12 having a valve SV8.

For example, the pH meter M2 can be calibrated by supplying the calibration liquid from the tank T3 to the pH tank C3 via the line L10. Note that it is preferable that there is no sample in the pH tank C3 and that the pH tank C3 has been cleaned before calibration.

The control device 50 controls various devices in the analysis system 40. Specifically, various valves and pumps are controlled to control the flow of the sample.

FIG. 5 is a diagram showing an example of the hardware configuration of the control device 50 according to the present embodiment.
As shown in FIG. 5, the control device 50 is a computer system, and includes, for example, a CPU 11, a ROM (Read Only Memory) 12 for storing programs executed by the CPU 11, and a ROM (Read Only Memory) 12 for storing programs executed by the CPU 11. A RAM (Random Access Memory) 13 that functions as a work area, a hard disk drive (HDD) 14 as a mass storage device, and a communication section 15 for connecting to a network or the like. Note that a solid state drive (SSD) may be used as the mass storage device. These parts are connected via a bus 18.

Further, the control device 50 may include an input unit such as a keyboard and a mouse, and a display unit such as a liquid crystal display device that displays data.

Note that the storage medium for storing programs and the like executed by the CPU 11 is not limited to the ROM 12. For example, other auxiliary storage devices such as a magnetic disk, a magneto-optical disk, and a semiconductor memory may be used.

A series of processing steps for realizing various functions described below are recorded in the form of a program in the hard disk drive 14, etc., and the CPU 11 reads this program into the RAM 13 etc. to process information and perform arithmetic processing. As a result, various functions described below are realized. Note that the program may be pre-installed in the ROM 12 or other storage medium, provided as being stored in a computer-readable storage medium, or distributed via wired or wireless communication means. etc. may also be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

FIG. 6 is a functional block diagram showing the functions included in the control device 50. As shown in FIG. 6, the control device 50 includes an analysis processing section 51, a calibration processing section 52, a replenishment processing section 53, a cleaning processing section 54, and an analysis result acquisition section 55.

The analysis processing unit 51 performs control for sample analysis. Specifically, the analysis processing unit 51 distributes the sample to the distribution channel when performing measurement on the sample. That is, control is performed so that the sample flows from the sample inlet to the electrical conductivity meter M1 and the pH meter M2.

FIG. 7 is a diagram showing the flow of a sample in the analysis system 40 when performing an analysis. That is, the inlet valve V1, valve SV1, and valve SV4 are opened to allow the sample to flow to the electrical conductivity meter M1, the intermediate tank C2, and the pH meter M2 as shown by the thick line in FIG. The sample to the pH meter M2 is supplied from the intermediate tank C2 by controlling the pump P2. Note that other valves and pumps are preferably closed (or stopped).

In this way, the sample is automatically supplied to the electrical conductivity meter M1 and the pH meter M2 under the control of the analysis processing section 51, so that automatic measurement can be performed. Furthermore, since the sample is supplied to the electrical conductivity meter M1 and the pH meter M2 through each pipe, contact with the outside air can also be suppressed.

The calibration processing unit 52 performs control for calibration of the pH meter M2. Specifically, when calibrating the pH meter M2, the calibration processing unit 52 supplies the calibration liquid from the calibration liquid tank (T3 to T5) to the pH meter M2 at a predetermined timing. The predetermined timing is a timing set in advance to start the configuration, and if it is performed periodically, a calibration cycle may be set in advance.

FIG. 8 is a diagram showing the flow of the calibration solution in the analysis system 40 when performing calibration. In addition, in FIG. 8, the case where the calibration liquid of tank T3 is used is taken as an example. The calibration processing unit 52 opens the valve SV6 and allows the calibration solution in the tank T3 to flow to the pH meter M2 (pH tank C3) as shown by the bold line in FIG. The calibration liquid to the pH meter M2 is supplied from the tank T3 by controlling the pump P1. The calibration liquid is discharged to the waste liquid tank T1 via the pH meter M2. Note that other valves and pumps are preferably closed (or stopped).

Then, the calibration processing unit 52 calibrates the pH meter M2 while the calibration solution is being supplied to the pH meter M2. Specifically, the calibration processing unit 52 calibrates the pH meter M2 so that the measurement result of the pH meter M2 that is measuring the supplied calibration solution becomes the known pH value of the calibration solution. There is no limitation on the specific method of calibrating the pH meter M2.

Since the calibration solution is supplied to the pH meter M2 at a predetermined timing and the pH meter M2 is calibrated, automatic calibration of the pH meter M2 is performed. Therefore, the effort of manually calibrating the pH meter M2, which requires periodic calibration, can be reduced. When the calibration is completed, the calibration liquid is discharged via line L4.

The replenishment processing unit 53 replenishes the internal comparison liquid in the pH meter M2. As mentioned above, it is necessary to use a comparison electrode in the pH meter M2, but the internal comparison liquid in the comparison electrode decreases. Therefore, the replenishment processing unit 53 supplies the internal comparison liquid to the reference electrode of the pH meter M2 so that the internal comparison liquid maintains a predetermined amount (required amount). Specifically, the internal comparison liquid (KCl) is supplied to the comparison electrode from the comparison liquid tank T6. Note that a predetermined amount of internal comparison liquid may be replenished when the amount of internal comparison liquid is less than a threshold value.

The cleaning processing section 54 performs control for cleaning. Specifically, when performing cleaning, the cleaning processing unit 54 supplies pure water to the equipment to be cleaned. In FIG. 9, a case where the pH meter M2 (and pH tank C3) is cleaned will be explained as an example. That is, the cleaning processing unit 54 opens the valve SV5 and allows the pure water in the pure water tank T2 to flow to the pH meter M2 (pH tank C3) as shown by the thick line in FIG. Pure water to the pH meter M2 is supplied from the pure water tank T2 by controlling the pump P1. The pure water is discharged to the waste liquid tank T1 via the pH meter M2. Note that other valves and pumps are preferably closed (or stopped).

Note that the object to be cleaned is not limited to the pH meter M2, and other equipment may be the object. Even when other equipment is to be cleaned, pure water is supplied in the same way as above.

Since the supply of pure water is controlled by the cleaning processing section 54, cleaning can be performed automatically. Pure water is discharged via line L4.

Although it is preferable that the analysis process, the calibration process, and the cleaning process be executed at different timings, the processes may be executed in parallel if they can be executed in parallel.

The analysis result acquisition unit 55 acquires measurement results from the pH meter M2 and the electrical conductivity meter M1. The acquired measurement results may be notified by display or the like, or may be automatically transmitted by a remote device, for example. In this embodiment, the measurement results are sent to a notification system that will be described later.

Next, an example of the calibration process by the above-mentioned control device 50 will be described with reference to FIG. 10. FIG. 10 is a flowchart illustrating an example of the procedure of the calibration process according to this embodiment. The flow shown in FIG. 10 is executed, for example, at a predetermined timing for performing calibration. The flow shown in FIG. 10 may be executed at preset intervals to perform calibration.

First, if the analysis process is being executed, the analysis process is stopped (S101). That is, when the sample is flowing to the pH meter M2, the valve or the like is controlled to stop the sample from flowing.

Next, a cleaning process is performed on the pH meter M2 (S102). That is, pure water is passed through the pH meter M2 to wash away the sample.

Next, the calibration solution is supplied to the pH meter M2 (S103). For example, as shown in FIG. 8, by controlling each valve, etc., the calibration solution in the tank T3 is supplied to the pH meter M2.

Next, while the calibration solution is being supplied to the pH meter M2, the pH meter M2 is calibrated (S104).

In this way, the calibration solution is supplied to the pH meter M2 and calibration is executed. If there are multiple calibration liquids, the processes from S102 to S104 may be performed by changing the type of calibration liquid.

In FIG. 10, the cleaning process is performed in S102, but if cleaning is not necessary, the process in S102 may be omitted.

Next, an example of the cleaning process by the above-mentioned control device 50 will be described with reference to FIG. 11. FIG. 11 is a flowchart illustrating an example of the procedure of the cleaning process according to the present embodiment. The flow shown in FIG. 11 is executed, for example, at a predetermined timing when cleaning is performed. The flow shown in FIG. 11 may be executed at preset intervals to perform cleaning. Although the case of cleaning the pH meter M2 will be described in FIG. 11, the same applies to cases where other equipment is to be cleaned.

First, if the analysis process is being executed, the analysis process is stopped (S201). That is, when the sample is flowing to the pH meter M2, the valve or the like is controlled to stop the sample from flowing.

Next, if the calibration process is being executed, the calibration process is stopped (S202). That is, when the calibration solution is flowing to the pH meter M2, the valve or the like is controlled to stop the flow of the calibration solution.

Next, the cleaning liquid is supplied to the pH meter M2 (S203). For example, as shown in FIG. 9, each valve etc. are controlled to supply pure water from the pure water tank T2 to the pH meter M2. That is, pure water is passed through the pH meter M2 to wash away the sample.

As explained above, according to the analysis system, management system, analysis method, and analysis program according to the present embodiment, a pH meter M2 and a tank containing a calibration solution with a known pH value are provided. , the calibration solution is supplied to the pH meter M2 at a predetermined period to calibrate the pH meter M2, so that automatic calibration of the pH meter M2 is performed. Therefore, the effort of manually calibrating the pH meter M2, which requires periodic calibration, can be reduced.

By providing a plurality of calibration solutions with different pH values, calibration can be performed corresponding to a plurality of pH values, and the pH meter M2 can be calibrated with high accuracy.

When measuring electrical conductivity, it is difficult for impurities to get mixed into the sample, but when measuring pH, impurities such as a comparison liquid (KCl, etc.) may get mixed into the sample. Therefore, by measuring the pH after the electrical conductivity, continuous measurement of the electrical conductivity and pH becomes possible more accurately.

By providing an intermediate tank C2 for storing a sample between the electrical conductivity meter M1 and the pH meter M2, even if the sample is charged during electrical conductivity measurement, it can be discharged before measuring the pH meter M2. Therefore, it becomes possible to perform pH meter M2 measurement more accurately.

[Second embodiment]
Next, an analysis system, a management system, an analysis method, and an analysis program according to a second embodiment of the present disclosure will be described.
In this embodiment, a case will be described in which the liquid properties of a sample are automatically adjusted. Hereinafter, the analysis system, management system, analysis method, and analysis program according to this embodiment will be mainly described with respect to the differences from the first embodiment.

The management system according to this embodiment is applied to the processing tank 122 as shown in FIG. 12. Similar to FIG. 2, a circulation system 130 and an analysis system 40 are connected to the processing tank 122. An adjustment system 160 is connected to the processing tank 122. That is, the analysis system 40 and the adjustment system 160 constitute a management system.

The adjustment system 160 acquires the measurement results from the analysis system 40, and adjusts at least one of pH and electrical conductivity of the sample based on the measurement results. As shown in FIG. 12, the adjustment system 160 includes a chemical tank 163, a pure water tank 162, and an addition control device 161.

The chemical tank 163 stores a pH adjusting chemical solution. The chemical tank 163 is connected to the processing tank 122 by a supply line W1. That is, the pH adjusting chemical solution is added to the processing liquid in the processing tank 122. The supply line W1 is provided with a solenoid valve (not shown), a flow meter (not shown), and a pump (not shown). The solenoid valve and pump are controlled by an addition control device 161, which will be described later. The measurement results of the flowmeter are transmitted to the addition control device 161.

The pure water tank 162 stores pure water. The pure water tank 162 is connected to the processing tank 122 by a supply line W2. That is, pure water is added to the processing liquid in the processing tank 122. The supply line W2 is provided with a solenoid valve (not shown), a flow meter (not shown), and a pump (not shown). The solenoid valve and pump are controlled by an addition control device 161, which will be described later. The measurement results of the flowmeter are transmitted to the addition control device 161.

The addition control device 161 controls the amount of addition based on the measurement results of the analysis system 40. For example, like the control device 50, it is constituted by a computer system (computer system) as shown in FIG. The control device 50 and the addition control device 161 may be configured by different computer systems, or may be integrated into one computer system.

The addition control device 161 adjusts the pH by adjusting the input amount of the pH adjusting chemical solution. The pH of the treatment liquid is controlled to fall within a predetermined reference range by introducing a pH adjusting chemical solution. For example, when the pH exceeds the upper limit of the reference range, a pH adjusting chemical solution is introduced to lower the pH by a predetermined value. When the pH is below the lower limit of the reference range, a pH adjusting chemical solution is injected to raise the pH by a predetermined value. For example, open the solenoid valve and use a pump to charge the fluid while monitoring the flow rate using a flow meter. The method for adjusting pH is not limited to the above. For example, the amount to be added may be determined depending on the detected pH value.

The addition control device 161 adjusts the electrical conductivity by adjusting the amount of pure water added. If the electrical conductivity is high, it becomes abnormal, so the electrical conductivity is lowered by adding pure water to dilute it. For example, when the electrical conductivity exceeds the upper limit of the reference range, pure water is added to lower the electrical conductivity by a predetermined value. For example, open the solenoid valve and use a pump to charge the fluid while monitoring the flow rate using a flow meter. The method of adjusting electrical conductivity is not limited to the above. For example, the input amount may be determined according to the detected value of electrical conductivity.

The management system may include a notification system (not shown). The notification system acquires measurement results from the analysis system 40 and notifies an abnormality when the measurement results are not within a preset management reference range. The notification may be made within the facility where the surface treatment line 120 is installed, or may be made by transmitting information to a remote facility. By notifying an abnormality when it deviates from the management standard range, it is possible to prevent the abnormal state from being left unaddressed.

FIG. 13 is an example of the overall configuration when the management system according to this embodiment is applied to a production line. As shown in FIG. 13, a sample is taken from a managed processing tank in a production line and analyzed by an analysis system 40. Then, the adjustment system 160 performs automatic injection of chemical solutions and the like. In this way, the processing liquid in each managed processing tank is managed.

As explained above, according to the analysis system, management system, analysis method, and analysis program according to the present embodiment, at least one of pH and electrical conductivity is adjusted based on the measurement results. , the liquid properties of the sample can be automatically adjusted. This makes it possible to reduce human errors by workers and reduce work time.

The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the invention. Note that it is also possible to combine each embodiment.

The analysis system, management system, analysis method, and analysis program described in each of the embodiments described above can be understood, for example, as follows.
The analysis system (40) according to the present disclosure includes a pH meter (M2) that measures the pH of a sample, tanks (T3, T4, T5) in which a calibration solution with a predetermined pH value is stored, and the tanks (T3, T5). control to supply the calibration solution from T4, T5) to the pH meter (M2) at a predetermined timing, and calibrate the pH meter (M2) while the calibration solution is being supplied to the pH meter (M2); A device (50).

According to the analysis system (40) according to the present disclosure, a pH meter (M2) and tanks (T3, T4, T5) in which a calibration solution with a known pH value is stored are provided, and calibration is performed at a predetermined timing. Since the liquid is supplied to the pH meter (M2) and the pH meter (M2) is calibrated, automatic calibration of the pH meter (M2) is performed. Therefore, the effort of manually calibrating the pH meter (M2), which requires periodic calibration, can be reduced.

In the analysis system (40) according to the present disclosure, the tanks (T3, T4, T5) may be provided respectively corresponding to a plurality of calibration solutions having different pH values.

According to the analysis system (40) according to the present disclosure, by providing a plurality of calibration solutions with different pH values, calibration can be performed corresponding to a plurality of pH values, and the pH meter (M2) can be calibrated with high accuracy. can do.

The analysis system (40) according to the present disclosure includes an electrical conductivity meter (M1) that measures the electrical conductivity of the sample, and the pH meter (M2) is connected to the electrical conductivity meter (M1) in the distribution route of the sample. M1), and the control device (50) may cause the sample to flow through the distribution path when measuring the sample.

When measuring electrical conductivity, it is difficult for impurities to get mixed into the sample, but when measuring pH, impurities such as a comparison liquid (KCl, etc.) may get mixed into the sample. Therefore, by measuring the pH after the electrical conductivity, continuous measurement of the electrical conductivity and pH becomes possible more accurately.

The analysis system (40) according to the present disclosure is provided between the electrical conductivity meter (M1) and the pH meter (M2) in the sample distribution path, and includes an intermediate tank (C2) for storing the sample. It is also a good idea to prepare.

According to the analysis system (40) according to the present disclosure, the intermediate tank (C2) for storing a sample is provided between the electrical conductivity meter (M1) and the pH meter (M2), so that the sample can be measured in the measurement of electrical conductivity. Even if it is charged, it can be discharged before measuring with the pH meter (M2). For this reason, it becomes possible to perform pH meter (M2) measurement more accurately.

In the analysis system (40) according to the present disclosure, the sample may be retained in the intermediate tank (C2) for a predetermined period of time or more.

According to the analysis system (40) according to the present disclosure, even if the sample is charged during electrical conductivity measurement, it is possible to effectively discharge the sample before performing pH meter (M2) measurement. becomes.

In the analysis system (40) according to the present disclosure, the pH meter (M2) performs pH measurement by a glass electrode method using an internal comparison liquid, and the control device (50) The internal comparison liquid may be supplied to the pH meter (M2) so that the internal comparison liquid in M2) maintains a predetermined amount.

According to the analysis system (40) according to the present disclosure, when the pH meter (M2) uses a glass electrode method using an internal comparison liquid, a predetermined amount of internal comparison liquid is required to perform measurement; Since the internal comparison liquid is supplied to the pH meter (M2) so as to maintain a predetermined amount by the control device (50), stable measurement can be performed using the pH meter (M2). In addition, the effort of manually replenishing the internal comparison liquid can be reduced.

A management system according to the present disclosure acquires the above analysis system (40) and measurement results in the analysis system (40), and determines at least one of pH and electrical conductivity for the sample based on the measurement results. and an adjustment system (160) for adjusting one side.

According to the management system according to the present disclosure, the liquid properties of the sample can be automatically adjusted by adjusting at least one of the pH and the electrical conductivity based on the measurement results.

In the management system according to the present disclosure, the adjustment system (160) may adjust the pH by adjusting the input amount of the pH adjustment chemical solution.

According to the management system according to the present disclosure, pH can be adjusted using a pH adjusting chemical solution.

In the management system according to the present disclosure, the adjustment system (160) may adjust the electric conductivity by adjusting the input amount of pure water.

According to the management system according to the present disclosure, electrical conductivity can be adjusted using pure water.

The management system according to the present disclosure may include a notification system that notifies an abnormality when the measurement result is not within a preset management reference range.

According to the management system according to the present disclosure, by notifying an abnormality when it deviates from the management reference range, it is possible to prevent an abnormal state from being left untreated.

An analysis system (40) according to the present disclosure includes an electrical conductivity meter (M1) that measures the electrical conductivity of a sample, and is provided downstream of the electrical conductivity meter (M1) in a distribution path of the sample; It includes a pH meter (M2) that measures the pH of a sample, and a control device (50) that causes the sample to flow through the distribution channel when measuring the sample.

When measuring electrical conductivity, it is difficult for impurities to get mixed into the sample, but when measuring pH, impurities such as a comparison liquid (KCl, etc.) may get mixed into the sample. Therefore, by measuring the pH after the electrical conductivity, continuous measurement of the electrical conductivity and pH becomes possible more accurately.

The analysis system (40) according to the present disclosure includes a pH meter (M2) that measures the pH of a sample by a glass electrode method using an internal comparison liquid, and a pH meter (M2) in which the internal comparison liquid maintains a predetermined amount. and a control device (50) for supplying the internal comparison liquid to the pH meter (M2).

According to the analysis system (40) according to the present disclosure, when the pH meter (M2) uses a glass electrode method using an internal comparison liquid, a predetermined amount of internal comparison liquid is required to perform measurement; Since the internal comparison liquid is supplied to the pH meter (M2) so as to maintain a predetermined amount by the control device (50), stable measurement can be performed using the pH meter (M2). In addition, the effort of manually replenishing the internal comparison liquid can be reduced.

The analysis method according to the present disclosure includes an analysis system (40) that includes a pH meter (M2) that measures the pH of a sample, and tanks (T3, T4, T5) in which a calibration solution with a predetermined pH value is stored. A method comprising: supplying the calibration solution from the tank (T3, T4, T5) to the pH meter (M2) at a predetermined timing; and supplying the calibration solution to the pH meter (M2). calibrating the pH meter (M2) in the state.

The analysis program according to the present disclosure is an analysis system (40) that includes a pH meter (M2) that measures the pH of a sample, and tanks (T3, T4, T5) in which a calibration solution with a predetermined pH value is stored. The program includes a process of supplying the calibration solution from the tanks (T3, T4, T5) to the pH meter (M2) at a predetermined timing, and supplying the calibration solution to the pH meter (M2). The computer is caused to perform a process of calibrating the pH meter (M2) in the state.

11: CPU
12:ROM
13: RAM
14: Hard disk drive 15: Communication section 18: Bus 40: Analysis system 50: Control device 51: Analysis processing section 52: Calibration processing section 53: Replenishment processing section 54: Cleaning processing section 55: Analysis result acquisition section 120: Surface treatment line 121: Crane 122: Processing tank 122a: Boric acid/sulfuric acid processing tank 122b: Primary washing processing tank 122c: Secondary washing processing tank 123: Target parts 130: Circulation system 131: Pump 132: Strainer 133: Circulation line 134: Detour line 135 : Collection line 160 : Adjustment system 161 : Addition control device 162 : Pure water tank 163 : Chemical tank C1 : EC tank C2 : Intermediate tank C3 : pH tank E1 : Waste water pit L1 to L13 : Line M1 : Electrical conductivity meter M2: pH meter P1-P2: Pump SV1-SV9: Valve T1: Waste liquid tank T2: Pure water tank T3-T5: Tank T6: Comparison liquid tank V1: Inlet valve W1: Supply line W2: Supply line Z1: Glass electrode Z2 : Reference electrode Z3 : Glass thin film Z4 : Internal electrode Z5 : Liquid junction Z6 : Internal electrode

Claims (11)

A pH meter that measures the pH of the sample;
A tank containing a calibration solution with a predetermined pH value;
a control device that supplies the calibration solution from the tank to the pH meter at a predetermined timing and calibrates the pH meter while the calibration solution is being supplied to the pH meter;
an electrical conductivity meter that measures the electrical conductivity of the sample;
an intermediate tank provided between the electrical conductivity meter and the pH meter in the sample distribution path, and for storing the sample;
Equipped with
The pH meter is provided downstream of the electrical conductivity meter in the sample distribution path,
The control device is an analysis system that distributes the sample to the distribution channel when performing measurement on the sample . The analysis system according to claim 1, wherein the tanks are provided respectively corresponding to a plurality of calibration solutions having different pH values. The analysis system according to claim 1 , wherein the sample is retained in the intermediate tank for a predetermined time or longer. The pH meter measures pH using a glass electrode method using an internal comparison liquid,
The analysis system according to any one of claims 1 to 3 , wherein the control device supplies the internal comparison liquid to the pH meter so that the internal comparison liquid in the pH meter maintains a predetermined amount. The analysis system according to any one of claims 1 to 4 ,
an adjustment system that acquires measurement results in the analysis system and adjusts at least one of pH and electrical conductivity of the sample based on the measurement results;
Management system with. The management system according to claim 5 , wherein the adjustment system adjusts the pH by adjusting the input amount of the pH adjustment chemical solution. The management system according to claim 5 or 6 , wherein the adjustment system adjusts the electrical conductivity by adjusting the amount of pure water input. The management system according to any one of claims 5 to 7 , further comprising a notification system that notifies an abnormality when the measurement result is not within a preset management reference range. an electrical conductivity meter that measures the electrical conductivity of a sample;
a pH meter that is installed downstream of the electrical conductivity meter in the sample distribution path and measures the pH of the sample;
a control device that distributes the sample to the distribution channel when performing measurement on the sample;
an intermediate tank provided between the electrical conductivity meter and the pH meter in the sample distribution path, and for storing the sample;
An analysis system equipped with an electrical conductivity meter that measures the electrical conductivity of the sample, a pH meter that is provided downstream of the electrical conductivity meter in the sample distribution route and measures the pH of the sample, and a pH meter that measures the pH of the sample; An analysis method for an analysis system comprising an intermediate tank provided between an electrical conductivity meter and the pH meter and storing the sample ,
An analysis method comprising the step of distributing the sample to the distribution channel when performing measurement on the sample . an electrical conductivity meter that measures the electrical conductivity of the sample, a pH meter that is provided downstream of the electrical conductivity meter in the sample distribution route and measures the pH of the sample, and a pH meter that measures the pH of the sample; An analysis program for an analysis system comprising an intermediate tank provided between an electrical conductivity meter and the pH meter and storing the sample ,
An analysis program for causing a computer to execute a process of distributing the sample to the distribution channel when measuring the sample .

Images