JP2011203038A - Bod automatic measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a BOD (biochemical oxygen demand) automatic measurement device which automates all of dilution, measuring of D1 values, storage of containers after measuring of D1 values, measuring of D5 values on an exact day of week, and discharge of containers after measuring of D5 values, by merely setting a stock solution.SOLUTION: The BOD automatic measurement device 1 includes a repository 2 which stores sample liquids after D1 values, which are an example of a first value, have been measured until D5 values, which are an example of a second value, are measured; a first measurement device 3 which measures the first values of the sample liquids; and a second measurement device 4 which retrieves the sample liquids from the repository 2 and measures the second values; and it automatically measures the BOD values of the sample liquids based on the first and second values.

Description

  The present invention is an apparatus for measuring BOD (Biochemical Oxygen Demand (or Biochemical Oxygen Consumption)) which is one of the standards indicating water quality such as factory effluent and river water. The present invention relates to a BOD automatic measuring apparatus that can automatically measure the D1 value, which is a measurement item on the first day, and the D5 value and BOD value, which are measurement items after five days, simply by installing a stock solution.

  As a standard for measuring water quality such as factory effluent and river water, there is a water quality standard of BOD, and this measurement method is defined in the standard of JIS-K0102: 2008.

  This JIS-K0102: 2008 standard includes (1) diluting a sample solution (stock solution) collected from factory effluent or river water to a predetermined concentration, and (2) dissolving the diluted sample solution after leaving it for a predetermined time. Measure the amount of oxygen as the first value, D1, and (3) measure the dissolved oxygen content of the same sample solution as the second value, D5, after storage for 5 days after the D1 value was measured. (4) The process of calculating the difference between the D1 value and the D5 value as the BOD value is defined as a method for measuring the BOD value.

  A large BOD value of the sample solution indicates that the difference value between the D1 value and the D5 value is large, and the amount of dissolved oxygen on the fifth day is greatly reduced compared to the first day. . That is, the larger the BOD value, the worse the water quality.

  Here, the D1 value is measured on the day when the sample solution is collected, and the D5 value is measured five days after the day when the D1 value is measured. Therefore, the measurement days of the D1 value and the D5 value are as follows. .

D1 value measurement day D5 value measurement day Monday Saturday Tuesday Tuesday Wednesday Wednesday Thursday Thursday Friday Friday Wednesday

  As can be seen from the correspondence between the measurement date of D1 value and the measurement date of D5 value, the D1 value needs to be worked only on the working days from Monday to Friday, but the D5 value can be calculated on Saturdays, Sundays (or holidays) ) Will also have to work. For this reason, it is required to automate the measurement of the D5 value. This is because if the measurement of the D5 value is not automated, the worker must work on a holiday for the measurement of the D5 value, resulting in a cost and management disadvantage.

  Further, measuring the D1 value and D5 value of the sample liquid is likely to be complicated manually or induce measurement errors. Of course, it is difficult to measure the BOD value of the sample liquid stored in many measurement containers.

  Under such circumstances, various techniques for automatically measuring the BOD value of a sample solution have been proposed (see, for example, Patent Documents 1, 2, and 3).

JP-A-6-230013 Japanese Utility Model Publication No. 6-16864 JP 2004-101495 A

  Patent Document 1 discloses an automatic sample measuring device including a conveyor for supplying sample bottles, a mechanism for opening and closing the sample bottles, and a mechanism for measuring D1 value or D5 value.

  However, the automatic measurement apparatus of Patent Document 1 uses the same measurement mechanism in which the D1 value measurement is completed and the sample bottle is stored in a dedicated storage room, and the sample bottle stored after 5 days is taken out and the D1 value is measured. It has a structure for measuring D5 value. That is, the same sample bottle is sent to one measurement mechanism so that the conveyor is at an interval of five days, and one measurement mechanism measures the amount of dissolved oxygen in the first and fifth sample bottles. .

  For this reason, the automatic measuring apparatus of patent document 1 has the problem that the sample bottle number which can be measured with the capacity | capacitance of a conveyor is restricted. In addition, since new sample bottles are manually input to the conveyor, problems such as measurement of D5 values of sample bottles that are not on the fifth day may occur due to operator error. In particular, since the D1 value and the D5 value are measured by the same measuring mechanism, it is necessary to check whether the D1 value or the D5 value is measured or whether it is measured on the correct day of the week. There are also problems in which errors due to errors occur. In addition, the automatic measurement device of Patent Document 1 manually dilutes the stock solution and manually inputs the diluted sample bottle into the automatic measurement device, so that the operation is complicated and an error in manual operation is caused. It has a problem that tends to occur.

  As described above, the technique of Patent Document 1 has a problem that the number of sample bottles is limited, and a manual operation is partially required, resulting in a measurement error due to a manual operation or an error of the apparatus. .

  Patent Document 2 has a mechanism for automatically moving a tray on which a sample container is placed and measuring a D1 value measured on the first day and a D5 value measured on the fifth day.

  However, since the same measurement unit measures the D1 value and the D5 value as in Patent Document 1, the D5 value is set on a day of the week that should not be intended due to an error in the tray movement mechanism or an operator's tray installation or tray movement error. Have the problem of being measured. In the technique of Patent Document 2, the sample container for which the measurement of the D1 value has been completed needs to be stored in a dedicated storage place. For this reason, the problem which requires an exclusive storage place besides an apparatus also arises. Since the storage in the storage place and the removal of the sample container from the storage place are performed manually, there is a possibility that an operation error may occur. If an operation error occurs in storage or retrieval, a problem that the D5 value is measured on the wrong day of the week may occur.

  Patent Document 3 prepares a stocker for measuring the D1 value and a stocker for measuring the D5 value. After each stocker is inserted, the container is opened to measure the D1 value or the D5 value. The technique of the automatic analyzer which returns the finished container to the stocker is shown. At this time, it is possible to measure on Saturdays and Sundays by inserting stockers for a plurality of days.

  However, like Patent Documents 1 and 2, the measurement mechanism for measuring the D1 value and the D5 value shares the same mechanism. For this reason, if a mistake occurs in the work of loading the stocker, there arises a problem that the D5 value is measured on the wrong day of the week. In addition, since the measurement is performed on the sample container installed in the stocker, the stocker for storing the container for which the measurement of the D1 value has been completed needs to be stored in a dedicated storage place. For this reason, the problem which requires a storage place arises.

  In addition, since the storage in the storage place and the extraction of the sample container from the storage place are performed manually, there is a possibility that an operation error may occur. If an operation error occurs during storage or extraction, there may be a problem that the D5 value is measured on the wrong day of the week.

  Moreover, the technique of patent document 3 measures the process of diluting the stock solution with an automatic dilution apparatus different from the automatic analysis apparatus, and mistakes in the dilution process or the diluted sample liquid are mistaken for the automatic analysis apparatus. Cause installation problems.

  As described above, the conventional automatic measuring device (1) measures the D5 value on the wrong day of the week due to manual errors or device errors in order to measure the D1 value and the D5 value with the same measuring mechanism. (2) A problem that requires a dedicated storage place for storing the sample container for which the D1 value has been measured, (3) A problem that the process of diluting the stock solution is a separate process, and (4) A diluted sample liquid Of measuring the wrong sample due to work mistakes when manually installing the sensor on the measuring device, and (5) a problem that automation is insufficient because various manual operations are required in the measurement. ,have.

  Due to these problems, there is a problem that the measurement of D5 value on Saturday, Sunday, and holidays, the process of diluting, the process of taking out from the storage location, etc. are not completely automated.

  In view of the above problems, the present invention simply completes the dilution, measurement of the D1 value, storage of the container in which the measurement of the D1 value has been completed, measurement of the D5 value on the exact day of the week, and measurement of the D5 value by simply installing the stock solution. A BOD automatic measuring device that automates all the discharge of the discharged container is provided.

  In order to solve the above-described problem, the BOD automatic measurement apparatus of the present invention includes a storage for storing the sample liquid after measuring the first value until the second value is measured, and the first of the sample liquid. A first measuring device for measuring the value, and a second measuring device for taking out the sample liquid from the storage and measuring the second value, and the storage for each day of the week when the first value is measured. The first measuring device has a plurality of day-of-week racks for storing the sample liquid, and the first measuring device is a dilution means for diluting the sample liquid at a predetermined magnification, and a waiting means for waiting the sample liquid diluted by the dilution means for a predetermined time or more. And a first measuring means for measuring a first value of the sample liquid kept on standby by the standby means, a supply means for injecting the sample liquid measured by the first measuring means into the container, and supplying the container to the day of the week rack The second measuring device removes the container from the rack corresponding to the day of the week to measure the second value. Has a to take out means, the sample solution was taken from the vessel taken out by take-out means, a second measuring means for measuring a second value.

  The BOD automatic measuring apparatus of the present invention simply installs the stock solution, dilutes, measures the first value, stores the container after the first value measurement, measures the second value on the exact day of the week, It is possible to automate all the discharge of the container for which the measurement of the second value has been completed.

  In addition, since the first measuring device and the second measuring device are separate mechanisms, a problem of mistaking the measurement date of the first value and the measurement date of the second value is prevented. Further, since the first value and the second value can be measured separately, the measurement of the D1 value that is the first value and the D5 value that is the second value can be measured simultaneously.

  In particular, the first measuring device and the first storage device are separated from each other on the measurement day of the day when the first value measurement is performed. The two measuring devices operate independently. As a result, since the measurement date of the second value corresponding to the measurement date of the first value depends only on the sorting of the storage, there is no possibility that the second measurement device mistakes the measurement day of the week. Separation of storage depends only on the measurement date of the first value, and the measurement date of the first value does not depend on manual work other than the work of installing the stock solution, so the measurement date of the first value is incorrect This is because there is no possibility.

  As a result, erroneous measurement due to manual mistakes can be prevented.

  Even when the measurement of the second value is performed on Saturdays, Sundays and public holidays, the second value is automatically measured without requiring manual work.

  Naturally, it is not necessary to store the container for which the measurement of the first value has been completed in a dedicated storage place.

It is a block diagram of the BOD automatic measurement apparatus in Embodiment 1 of this invention. It is a flowchart of the measurement process of the BOD automatic measurement apparatus in Embodiment 1 of this invention. It is a schematic diagram of the dilution means which performs the dilution process in Embodiment 1 of this invention. It is explanatory drawing explaining the flow of the dilution process in Embodiment 1 of this invention. It is explanatory drawing explaining the D1 measurement process in Embodiment 1 of this invention. It is a schematic diagram which shows the arrangement | sequence of the container in the waiting | standby process in Embodiment 1 of this invention. It is a schematic diagram which shows the relationship between a day-of-week rack, D1 measuring device, and D5 measuring device in Embodiment 1 of this invention. It is a schematic diagram which shows the D5 measurement process in Embodiment 1 of this invention. It is a block diagram of the BOD automatic measurement apparatus in Embodiment 2 of this invention. It is an image figure of the measurement data table | surface in Embodiment 2 of this invention.

  The BOD automatic measuring apparatus according to the first aspect of the present invention includes a storage for storing the sample solution after measuring the first value until the second value is measured, and the first value of the sample solution. A first measuring device for measuring, and a second measuring device for taking out the sample solution from the storage and measuring the second value, and the storage is provided with the sample solution for each day of the week when the first value is measured. The first measuring device includes a diluting means for diluting the sample liquid at a predetermined magnification, a waiting means for waiting for the sample liquid diluted by the diluting means for a predetermined time or more, A first measuring means for measuring a first value of the sample liquid waited by the waiting means, and a supply means for injecting the sample liquid measured by the first measuring means into the container and supplying the container to the day rack. And the second measuring device removes the container from the day of the week rack corresponding to the day of the week on which the second value is measured. A means out, the sample was taken from the vessel taken out by take-out means, a second measuring means for measuring a second value.

  With this configuration, the BOD automatic measuring device can automatically measure the BOD value simply by installing the sample solution that is the stock solution.

  In the BOD automatic measuring device according to the second invention of the present invention, in addition to the first invention, the first measuring device and the storage are connected so as to be able to deliver the container, the storage and the second measuring device. Are connected so as to be able to deliver the container, and the supply means and the take-out means automatically execute the process based on the storage.

  With this configuration, the first measuring device and the second measuring device have no interdependency other than the storage, and the measurement day of the first value and the measurement day of the second value are mistakenly measured. Don't make mistakes.

  In the BOD automatic measuring device according to the third invention of the present invention, in addition to any of the first and second inventions, the storage is on the day of the week rack from the first measuring device side to the second measuring device side. Move the container.

  With this configuration, the BOD automatic measuring device can deliver the container containing the sample liquid whose first value has been measured to the second measuring device.

  In the BOD automatic measuring apparatus according to the fourth aspect of the present invention, the storage further includes a discharge rack that separates and stores the containers for which the second value has been measured.

  With this configuration, the container whose measurement has been completed can be easily and reliably disposed of or washed.

  In the BOD automatic measuring apparatus according to the fifth aspect of the present invention, in addition to any of the first to fourth aspects, the diluting means dilutes the sample solution at a predetermined magnification.

  With this configuration, the BOD automatic measuring apparatus can automatically dilute the sample solution as the stock solution to a concentration determined by the standard.

  In the BOD automatic measurement apparatus according to the sixth aspect of the present invention, in addition to any of the first to fifth aspects, the standby means includes a conveyor that moves the diluted sample liquid to the first measurement means side. And the time required for the conveyor to move is a predetermined time or more.

  With this configuration, the BOD automatic measuring device can reliably give the sample solution a waiting time of a predetermined time or longer.

  In the BOD automatic measurement apparatus according to the seventh aspect of the present invention, in addition to any of the first to sixth aspects, the first measurement apparatus further includes a container supply means for automatically supplying the container to the supply means. .

  With this configuration, since the container for injecting the sample liquid is automatically supplied, it is not necessary for a person to perform the supply operation, and contamination of the container with dust can be prevented.

  In the BOD automatic measuring apparatus according to the eighth invention of the present invention, in addition to any of the first to seventh inventions, the supply means includes a closing mechanism for automatically closing the stopper of the container, and the taking-out means is An opening mechanism that automatically opens the stopper of the container is provided.

  With this configuration, the BOD automatic measuring apparatus can accurately measure the second value without adversely affecting the sample liquid inside the container.

  In the BOD automatic measuring device according to the ninth aspect of the present invention, in addition to any of the fourth to eighth aspects, the second measuring means may place the container whose second value has been measured into the discharge rack. It further has a discharge means for discharging.

  With this configuration, the BOD automatic measuring apparatus can notify the operator of the end of the measurement while temporarily storing the container for which the measurement has been completed.

  In the BOD automatic measuring device according to the tenth invention of the present invention, in addition to any of the first to ninth inventions, the second measuring device can perform dilution based on the first value and the second value. BOD calculating means for calculating the BOD value of the sample liquid thus obtained is further provided.

  With this configuration, the BOD automatic measuring apparatus can measure the BOD value with high accuracy.

  In the BOD automatic measurement apparatus according to the eleventh aspect of the present invention, in addition to any of the first to tenth aspects, at least a part of the first measurement apparatus, the storage, and the second measurement apparatus is controlled. The controller further includes a control unit that updates the measurement data table corresponding to the container. The measurement data table includes a first value in the container added in the first measurement device, and a second measurement device. , The second value in the container and the BOD value are added.

  With this configuration, the BOD automatic measuring device can record the water quality of the sample solution and provide it to the operator as information.

  In the BOD automatic measurement apparatus according to the twelfth aspect of the present invention, in addition to the eleventh aspect, the measurement data table further includes identification information for identifying the container, and the identification information includes an ID code and a bar included in the container. Recognized by at least one of a code, a two-dimensional bar code, and an identification mark.

  With this configuration, the control unit can easily identify the sample liquid.

  Hereinafter, description will be given with reference to the drawings.

(Embodiment 1)
Embodiment 1 will be described.

(Overview)
First, the outline | summary of the BOD automatic measuring apparatus in Embodiment 1 is demonstrated using FIG. 1 and FIG.

  The BOD automatic measuring apparatus in Embodiment 1 automatically executes all the processes necessary to measure the BOD value by simply installing a sample container containing a sample liquid such as factory wastewater or river water. The BOD value is measured. Since the BOD value is a numerical value indicating the water quality of factory wastewater or river water, there is a possibility that the measurement accuracy may be lowered due to human work intervening in the process. On the other hand, the BOD automatic measuring apparatus according to the first embodiment automatically measures all the steps after setting the stock solution, so there is no room for human work and can measure the BOD value with high accuracy.

  FIG. 1 is a block diagram of a BOD automatic measurement apparatus according to Embodiment 1 of the present invention. FIG. 1 conceptually shows the overall configuration of the BOD automatic measuring apparatus, and shows the relationship between the elements included in the BOD automatic measuring apparatus. FIG. 2 is a flowchart of the measurement process of the BOD automatic measurement apparatus according to Embodiment 1 of the present invention. FIG. 2 shows steps performed by the BOD automatic measurement apparatus.

  The BOD automatic measuring device 1 is a first measuring device that measures the D1 value of the storage container 2 that stores the storage container 54 that is a container in which the D1 value that is the first value is measured, as a major element. A D5 measuring device 4 is provided which is a second measuring device for measuring the D5 value, which is the second value of the sample liquid inside the storage container 54 taken out from the D1 measuring device 3 and the storage 2.

  In the first embodiment, the D1 value is defined as an example of the first value and the D5 value is defined as an example of the second value. However, according to changes in standards and procedures related to the measurement of the BOD value. Thus, the value defined by the first value and the second value is flexibly changed.

  The storage 2 separates the storage container 54 that stores the sample solution whose D1 value is measured, for each day of the week when the D1 value is measured. For this reason, the storage 2 is provided with day-of-week racks 20a to 20e. The D1 measuring instrument 3 measures the D1 value of the sample solution in the stock solution container 50, and supplies the storage container 54 that stores the sample solution for which the D1 value has been measured to the day of the week racks 20a to 20e corresponding to the measured day of the week. To do. The D5 measuring device 4 takes out the storage container 54 of the day of the week rack corresponding to the day of the week five days before the D5 measurement day from the day of the week rack provided in the storage 2, and measures the D5 value of the sample liquid inside the extracted storage container. . The D5 measuring instrument 4 supplies the empty storage container 54 after the measurement of the D5 value is completed to the discharge rack 21 indicating that the measurement is completed.

  The D1 value is the value of the dissolved oxygen amount on the first day of the sample solution, the D5 value is the value of the dissolved oxygen amount after 5 days of the sample solution, and both are parameters necessary for measuring the BOD value of the sample solution It is. A value calculated from the D1 value and the D5 value is a BOD value indicating the water quality of the sample solution.

  The BOD automatic measuring apparatus 1 is based on the storage 2 that stores the storage container 54 that stores the sample solution whose D1 value is measured, and the D1 measuring device 3 and the D5 measuring device 4 operate independently of each other. Is possible. As described above, the D2 measuring device 3 and the D5 measuring device 4 operate independently while interposing the storage 2 therebetween, so that the storage 2 only separates and stores the storage container 54. Thus, the measurement of the D1 value in the D1 measuring device 3 and the measurement of the D5 value in the D5 measuring device 4 on the measurement date related to the measurement date of the D1 value are executed without error.

  As described above, the BOD automatic measuring apparatus 1 according to the first embodiment installs the D1 measuring device 3 and the D5 measuring device 4 on both sides with the storage 2 as a reference, and at one end of the storage 2 the D1 measuring device 3. Handles a stock solution container 50 containing a stock solution and a storage container 54 containing a sample solution in which D1 is measured, and a storage container containing a sample solution measured by the D5 measuring instrument 4 at the other end of the storage 2 By handling 54, it is possible to measure an error-free BOD value while preventing an increase in the size of the apparatus or equipment.

  In order to realize the above functions, the BOD automatic measuring apparatus 1 includes a predetermined unit for each of the D1 measuring device 3 and the D3 measuring device 4.

  The D1 measuring device 3 is a stock solution container installation means 30 for installing a stock solution container 50 in which a sample solution that is a stock solution is stored, a dilution means 31 for diluting the sample solution in the stock solution container 50, and a standby for storing the diluted sample solution. Standby means 32 for waiting the container 52 for a predetermined time or more, D1 measuring means 33 as a first measuring means for measuring the D1 value that is the amount of dissolved oxygen in the sample liquid in the standby container 52 after standby, the storage 2 Storage container supply means 34 as a container supply means for supplying an empty storage container 54 to be used when storing the sample liquid, and refilling means for refilling the sample liquid whose D1 value has been measured from the D1 measurement container 53 to the storage container 54 35. Sealing means 36 for sealing the stopper 54a at the opening of the storage container 54 for storing the sample liquid whose D1 value is measured, and the sealed storage container 54 for the day of the week corresponding to the day of the week when the D1 value is measured. It comprises supply means 37 supplies the click 20a to 20e.

  The storage 2 includes day-of-week racks 20a to 20e corresponding to the day of the week when the D1 value is measured. For example, the day-of-week rack 20a corresponds to Monday, the day-of-week rack 20b corresponds to Tuesday, and the day-of-week rack 20c corresponds to Wednesday. The day of the week rack 20d corresponds to Thursday, and the day of the week rack 20e corresponds to Friday. Further, the storage 2 further includes a discharge rack 21 that receives a storage container 54 that is no longer needed after the calculation of the BOD value.

  The D5 measuring instrument 4 is a D5 measuring means as a second measuring means for measuring the D5 value, which is the amount of dissolved oxygen in the sample liquid in the storage container 54, the take-out means 40 for taking out the storage container 54 from the day of week racks 20a to 20e. 41, a BOD calculating means 42 for calculating a BOD value between the D1 value and the D5 value, and a discharging means 43 for discharging the storage container 54 for which the measurement of the D5 value has been completed to the discharging rack 21.

  Further, the D1 measuring instrument 3 and the storage 2 are connected so as to be able to deliver the storage container 54. The storage 2 and the D5 measuring instrument 4 are connected so as to be able to deliver the storage container 54. The supply means 37 and the take-out means 40 automatically execute processing based on the storage 2.

  Each of these means includes a mechanical / electrical mechanism necessary for executing each means, and performs a desired process.

(Processing procedure of BOD automatic measuring device)
Next, the processing procedure of the BOD automatic measuring apparatus 1 will be described with reference to FIGS. FIG. 2 is a flowchart showing all processes performed by the D1 measuring device 3, the storage 2, and the D5 measuring device 4 as a whole.

  First, in step ST <b> 1, a stock solution container 50 in which a sample solution (stock solution) such as factory wastewater or river water to be measured is stored is installed on the installation base of the stock solution container installation step 30. The stock solution container 50 is installed by human work, but may of course be automatically installed by a crane or a conveyor.

  Next, in step ST2, the diluting means 31 executes a diluting step of injecting and diluting the sample liquid stored in the stock solution container 50 into the diluting container 51. The dilution step is executed by diluting the sample solution in the dilution container 51 using the dilution water defined in JIS K 0102: 2008 (hereinafter referred to as “JIS standard”). The diluting means 31 dilutes the sample solution at a predetermined dilution rate based on the specification defined in the JIS standard.

  Next, in step ST3, the standby unit 32 causes the standby container 52 into which the sample solution has been injected from the dilution container 51 to wait for a predetermined time or more. This is a standby process. In the standby step, the standby unit 32 causes the standby container 52 to wait for a predetermined time or more defined in JIS standards. This is because if the waiting time is insufficient, the D1 value is measured in an insufficiently diluted state, and as a result, the BOD value is calculated as an incorrect value.

  Next, in step ST4, the D1 measuring means 33 injects the sample solution waiting in the standby container 40 into a D1 measuring container 53, which will be described later with reference to a later drawing, and measures the D1 value. This is the D1 measurement process as the first measurement process. The D1 measuring unit 33 measures the D1 value using a known unit or the like based on the specification defined in the JIS standard. The measured D1 value is stored as measurement data in a predetermined storage unit, or printed as measurement data on a predetermined recording sheet.

  In parallel with steps ST1 to ST4, the storage container 54 is supplied by the storage container supply means 34 in step ST5. Although FIG. 2 shows that step ST5 is processed between step ST4 and step ST6, step ST5 may be processed before step ST4. In short, before step ST6, the processing of step ST5 is completed, and the sample liquid for which the measurement of the D1 value has been completed may be refilled into the storage container 54 used for storing in the storage 2. The storage container 54 may be supplied manually. Alternatively, the storage container 54 may be supplied by a belt conveyor or a crane.

  Next, in step ST <b> 6, the refilling unit 35 refills the sample solution in which the D1 value stored in the D1 measurement container 53 is measured into the storage container 54 supplied from the storage container supply unit 34. This is the refilling process. The storage container 54 is installed in a magazine or the like, and the magazine 80 in which a plurality of storage containers 54 are installed is then sent to the day-of-week racks 20a to 20e of the storage 2.

  Next, in step ST7, the sealing means 36 tightly plugs the opening of the storage container 54 that stores the sample liquid whose D1 value has been measured. This is the sealing process. A robot arm (not shown) provided in the sealing means 36 sets the stopper 54a in accordance with the opening of the storage container 54, and pushes the stopper 54a into the opening to seal it. With this airtight stopper, the storage container 54 for storing the sample liquid whose D1 value has been measured is not affected by the external atmosphere. When measuring the amount of dissolved oxygen after a few days, the storage container 54 (ie, the sample) The result depends only on the liquid itself). When the sealed storage container 54 is stored in the storage 2, it is stored in a state in which the amount of dissolved oxygen is changed only by being consumed by microorganisms contained in the sample solution.

  Next, in step ST <b> 8, the supply unit 37 supplies the sealed storage container 54 to the storage 2. This is the supply process. The storage 2 includes day-of-week racks 20a to 20e corresponding to the day of the week on which the D1 value is measured. The supply unit 37 supplies the storage container 54 to the day of the week racks 20a to 20e corresponding to the day of the week on which the D1 value is measured.

  Next, in step ST9, the storage 2 stores the storage container 54 supplied by the supply means 37 for a predetermined time. This is the storage process.

  Next, in step ST <b> 10, the takeout unit 40 takes out the storage container 54 from the storage 2. At this time, the take-out means 40 takes out the storage container 30 from the day of the week rack corresponding to the day of the week five days before the D5 measurement day for measuring the D5 value. This is the removal process. The storage container 54 for storing the sample solution stored for 5 days after the D1 value is measured is stored in the day of the week rack corresponding to the day of the week five days before the D5 measurement day for measuring the D5 value. The storage container 54 taken out from the day of the week rack 5 days ago is the sample liquid to be measured for the D5 value. The take-out means 40 opens the stopper 54a of the storage container 54.

  Next, in step ST11, the D5 measuring means 41 injects the sample solution in the storage container 54 into the D5 measuring container 55 and measures the D5 value. The D5 value is a value indicating the amount of dissolved oxygen after 5 days of the sample solution. This is the D5 measurement process which is the second measurement process. Similar to the D1 measuring means 33, the D5 measuring means 41 measures the dissolved oxygen content of the sample liquid in the D5 measuring container 55 using various known means. As a result, the D5 measuring means 41 can measure the D5 value. The D5 measurement means 41 stores the measured D5 value as measurement data in a predetermined storage unit or prints it as measurement data on a predetermined recording sheet.

  Further, in step ST12, the BOD calculating unit 42 calculates the BOD value based on the values of the D1 value and the D5 value. This is the BOD calculation process. Alternatively, the D5 measuring means 41 may calculate this BOD value in accordance with the measurement of the D5 value. That is, the D5 measurement unit 41 may execute the D5 measurement process and the BOD calculation process. The BOD calculation unit 42 stores the calculated BOD value as measurement data in a predetermined storage unit or prints it as measurement data on a predetermined recording sheet. Receiving this measurement data, the user can know the quality of the target industrial wastewater and river water.

  Finally, in step ST <b> 13, the discharge unit 43 discharges the empty storage container 54 after extracting the sample solution to the D5 measurement container 55 to the discharge rack 21. This is the discharge process. Since the storage rack 54 in which all the steps of measuring the BOD value have been completed is stored in the discharge rack 21, the user can manually or automatically perform operations such as cleaning the unnecessary storage container 54. Can be turned to.

  By performing the above-described series of processing, the BOD value of the sample liquid to be measured is automatically measured, and the quality of factory wastewater and river water is measured.

  As described above, the BOD automatic measuring apparatus 1 according to Embodiment 1 can be used for dilution only by installing the stock solution container 50 containing the stock solution as the sample solution to be measured, such as factory waste water and river water, in the container installation means 30. All of the steps starting from (1) to calculating the BOD value are automatically executed. By performing everything automatically, the BOD automatic measuring apparatus 1 can calculate the BOD value of the sample liquid with high accuracy without causing a measurement error or the like.

  Next, details of each part and main processes will be described.

(D1 measuring instrument)
As shown in FIG. 1, the D1 measuring device 3 includes a stock solution container installation step 30 in which a stock solution container 50 is installed, and a storage container supply unit 34 in which an empty storage container 54 is installed. In addition, a diluting means 31 is provided for diluting the sample solution in the stock solution container 50 installed in the stock solution container installation step 30. The diluting means 31 includes a diluting container 51, a mechanism for introducing the diluting water into the diluting container 51, and a measuring instrument (not shown) that measures the volume (or weight, etc.) of the sample solution and the diluting water.

  Further, the D1 measuring device 3 includes a conveyor for realizing a standby process. This conveyor is used for waiting the standby container 52 that stores the diluted sample solution for a predetermined time or more. That is, the conveyor moves while the standby container 52 is repeatedly moved and stopped to the D1 measuring means 33 side. The travel time including the stop time is equal to or longer than a predetermined time. Further, the D1 measuring device 3 is provided with D1 measuring means 33 for measuring the D1 value.

  The D1 measuring device 3 includes a mechanism for feeding the storage container 54 to the day of the week racks 20a to 20e at the tip of the conveyor. Further, the D1 measuring device 3 is orthogonal to the discharge direction of the day of the week racks 20a to 20e. It has a mechanism that can move in the direction.

(Dilution process)
Details of the dilution process will be described with reference to FIGS. The dilution means 31 performs a dilution process.

  FIG. 3 is a schematic diagram of a diluting unit that performs the diluting step according to Embodiment 1 of the present invention. FIG. 4 is an explanatory diagram for explaining the flow of the dilution process in the first embodiment of the present invention.

  In FIG. 3, the diluting means 31 includes a diluting container 51, a diluting tank 311 containing diluting water, a diluting solution supply unit 312, and a stock solution supplying unit 313. The dilution container 51 contains a sample solution that is a stock solution, and the dilution tank 311 contains dilution water.

  The dilution means 31 supplies the sample solution from the stock solution container 50 to the dilution container 51 through the stock solution supply unit 313 and supplies the dilution water from the dilution tank 311 to the dilution container 51 through the dilution solution supply unit 312. The diluent supply unit 312 and the stock solution supply unit 313 can automatically adjust the supply amount. By supplying a predetermined amount of the stock solution and the diluent to the dilution container 51, the diluted sample liquid is accommodated in the dilution container 51.

  Further, the diluting means 31 dilutes the sample solution which is a stock solution in three stages. As an example, the diluting means 31 dilutes the sample solution, which is a stock solution, in three stages of 2 times, 4 times, and 8 times. FIG. 4 shows this three-stage dilution process.

  First, in step ST20, the sample solution 60 which is a stock solution and the same amount of dilution water 61 are supplied to the dilution container 52. Next, in step ST21, the sample solution 60 and the diluent 61 supplied into the dilution container 52 are stirred. Through this stirring, the sample liquid in the dilution container 52 in step ST21 is in a state of being diluted twice from the stock solution.

  Next, in step ST22, half of the sample liquid (diluted twice) in the dilution container 52 is supplied to the standby container 52a. This standby container 52a will contain the sample solution diluted twice, and this standby container 52a is made to wait for a predetermined time or more in the standby process. Further, the D1 measurement step 33 measures the D1 value for the sample liquid diluted twice in the standby container 52a.

  Next, in step ST23, the same amount of dilution water 61 as that of the sample liquid remaining in the dilution container 51 (diluted twice) is supplied. Next, in step ST24, the sample solution and the dilution water 61 are stirred. Through this stirring, the sample solution inside the dilution container 52 is diluted four times from the stock solution.

  Next, in step ST25, half of the sample liquid diluted four times in the dilution container 51 is supplied to the standby container 52b. This standby container 52b accommodates the sample solution diluted four times. This standby container 52b is made to wait for a predetermined time or more in the standby process. Further, the D1 measuring means 33 measures the D1 value with respect to the sample liquid diluted four times inside the standby container 52b.

  Next, in step ST26, the same amount of diluted water 61 as that of the sample liquid remaining in the dilution container 51 (diluted 4 times) is supplied. Next, in step ST27, the sample solution and the diluent 61 are stirred. Through this stirring, the sample solution in the dilution container 51 is diluted eight times from the stock solution.

  Next, in step ST28, the sample liquid diluted 8 times in the dilution container 51 is supplied to the standby container 52c. This standby container 52c accommodates the sample solution diluted 8 times. This standby container 52c is made to wait for a predetermined time or more in the standby process. Further, the D1 measuring means 33 measures the D1 value with respect to the sample liquid diluted eight times inside the standby container 52c.

  Finally, in step ST29, the diluted dilution vessel 51 is washed to receive the next stock solution.

  As described above, the diluting unit 31 dilutes the sample liquid in three stages of 2 times, 4 times, and 8 times by adding the dilution water 61 to the sample liquid that is the stock solution stored in the dilution container 51. As shown in FIGS. 3 and 4, the dilution process is automatically processed, so that no error due to human work occurs.

(Standby process)
Next, details of the standby process will be described.

  The standby step is a step of waiting the standby container 52 that stores the diluted sample solution for a predetermined time or longer, and is realized by the standby unit 32. The JIS standard stipulates that the D1 value is measured after the diluted sample solution is kept waiting for a predetermined time or more. This is because if the diluted state of the diluted sample liquid is insufficient, variations in the measurement of the D1 value indicating the amount of dissolved oxygen may occur.

  The waiting unit 32 includes a conveyor. This conveyor moves the standby container 52 that stores the diluted sample solution to the D1 measuring means 33 side. Using this travel time, the standby means 32 causes the standby container 52 to wait for a predetermined time or longer.

  Here, it is defined in the current JIS standard that the predetermined time is 15 minutes (that is, the waiting time in the standby process is 15 minutes or more). For this reason, in the standby process, the moving time of the conveyor for moving the standby container 52 to the D1 measurement process is set to 15 minutes or more. By this moving time, the standby means 32 can make the standby container 52 wait for 15 minutes or more from the dilution process to the D1 measurement process.

  The predetermined time of 15 minutes or more is an example defined in the JIS standard, and the standby process may wait the standby container 52 for a different time depending on the standard. In particular, when a future change in standards relating to the measurement of BOD values including the JIS standard occurs, the predetermined time may be a time other than 15 minutes.

  When the standby process is completed, the diluted sample solution is sent to the D1 measurement process in which the D1 value is measured. Since the dilution process is diluted in three stages, the standby container 52 for storing the sample solution includes a plurality of standby containers 52a, 52b, and 52c. In the standby process, each of the standby containers 52a, 52b, and 52c that stores the sample solutions diluted at these different dilution rates is allowed to wait for a predetermined time or more.

(D1 measurement process)
Next, details of the D1 measurement process will be described. In the D1 measuring step, the D1 measuring means 33 measures a D1 value indicating the amount of dissolved oxygen in the diluted sample solution.

  FIG. 5 is an explanatory diagram illustrating the D1 measurement process in the first embodiment of the present invention. FIG. 5 shows the dilution process and the D1 measurement process together. The explanation about the dilution process is as described above, and will be omitted.

  The D1 measuring unit 33 injects the diluted sample liquid extracted from the standby container 52 into the D1 measuring container 53. The D1 measuring means 33 measures the amount of dissolved oxygen by using various known measuring methods, and measures the D1 value. In addition, as a well-known technique of a measuring method, it is a dissolved oxygen amount measuring device etc. provided with detectors, such as an electrical type and an optical type, for example.

  The D1 measuring means 33 measures the D1 value in each of the measurement containers that accommodate the sample liquids diluted in three stages. Moreover, since there are many types of sample solutions depending on the location and time of collecting the stock solution, the D1 measurement step measures the D1 value for each type. For this reason, in the first embodiment of the present invention, the standby unit 32 includes three standby containers 52a, 52b, 52c and each of the standby containers 52 in an array in which the types of sample liquids are arranged in parallel. Description will be made assuming that the process moves to 33 and the D1 value is measured. This is as shown in FIG.

  FIG. 6 is a schematic diagram showing the arrangement of measurement containers in the standby step according to Embodiment 1 of the present invention. Eight standby containers 52 are arranged in the standby process 32 (vertical direction in FIG. 6), and a plurality of standby containers corresponding to the type of sample liquid are arranged in the moving direction.

  The standby container 52a contains a sample solution diluted two times, the standby container 52b contains a sample solution diluted four times, and the standby container 52c has a sample diluted eight times. Contains liquid.

  Further, a sample liquid A of a certain factory wastewater and a sample liquid B of a different factory wastewater are arranged in a direction orthogonal to the moving direction of the conveyor. That is, each of the diluted sample liquids of the sample liquid A and the sample liquid B includes three measurement containers arranged in the moving direction, each of which is a sample liquid diluted twice and a sample diluted four times. The liquid and the sample liquid diluted 8 times are accommodated.

  When the standby containers having such an arrangement flow to the next D1 measurement step, the D1 measurement means 33 measures the respective D1 values by the flow operation. Further, the D1 measuring means 33 stores the measured D1 value in the storage unit as measurement data or prints it on a recording sheet as measurement data. By such storage as measurement data, the operator can confirm the measured D1 value.

(Supply process)
Next, a supply process etc. are demonstrated.

  First, the refilling unit 35 refills the storage container 54 with the sample liquid in the measurement container 52 that stores the sample liquid whose D1 value has been measured. This is as shown in FIG. The storage container 54 is a container used when the storage 2 stores, and is installed and sent by the storage container supply process 34. The refilling means 35 refills the sample liquid whose D1 value has been measured from the measurement container 53 into the storage container 54 that has been sent.

  The storage container 54 that has been refilled is plugged by the sealing means 36. By the sealing plug, the sample solution in the storage container 54 is stored in the storage 2 without being affected by the outside.

  In the supply step, the storage container 54 is supplied to the storage 2 using the supply means 37.

  Here, the storage 2 is provided with day-of-week racks 20a to 20e corresponding to the day of the week on which the D1 value is measured. The day of the week rack 20a corresponds to the case where the measurement day of the D1 value is Monday, the day of the week rack 20b corresponds to the case where the measurement day of the D1 value is Tuesday, and the day of the week rack 20c is the measurement day of the D1 value to be Wednesday. The day of week rack 20d corresponds to the case where the measurement day of the D1 value is Thursday, and the day of week rack 20e corresponds to the case where the measurement day of the D1 value is Friday. Currently, since Saturday and Sunday are generally closed days, the storage 2 shown in FIG. 1 does not include a day of the week rack corresponding to Saturday and Sunday. Of course, the storage 2 may further include a day of the week rack corresponding to Saturday and Sunday. The storage 2 further includes a discharge rack 21 that discharges the storage container 54 for which the measurement of the D5 value has been completed (that is, the calculation of the BOD value has been completed).

  As shown in FIG. 7, the D1 measuring instrument 3 moves in a direction perpendicular to the transport direction of the storage 2 (or the supply means 37 moves) and corresponds to the day of the week when the D1 value is measured. The storage container 54 is supplied to the day of the week rack. FIG. 7 is a schematic diagram showing the relationship between the day of the week rack, the D1 measuring device, and the D5 measuring device in the first embodiment of the present invention.

  The supply means 37 supplies the storage container 54 stored in the magazine 80 to the day rack corresponding to the D1 measurement day. At this time, the D1 measuring device 3 or the supply means 37 moves in the transport direction of the storage case 2, so that the supply means 37 is a day of the week corresponding to the measurement day of the D1 value in the day of the week racks 20a to 20e. The storage container 54 stored in the magazine 80 is supplied to the rack. For example, when the measurement day of the D1 value is Monday, the supply unit 37 supplies the storage container 54 to the day of the week rack 20a as shown in FIG.

  The supply means 37 may supply the storage container 54 as it is to the day of the week racks 20a to 20e, or may be supplied in a state of being stored in the magazine 80 as shown in FIG.

  When the day of measurement of the D1 value is Wednesday, the supply unit 37 supplies the storage container 54 to the day of week rack 20c.

  In this way, the supply unit 37 stores the sample liquid whose D1 value has been measured in the day of the week rack corresponding to the day of the D1 measurement while moving vertically or horizontally with respect to the storage 2. The container 54 is supplied while being sorted for each measurement day.

  The storage 2 can store the sample container 30 by separating it for each measurement day of the D1 value.

(Storage process)
Next, the storage process will be described.

  The storage 2 stores the storage container 54 in the day of the week racks 20a to 20e corresponding to the measurement day of the D1 value for a predetermined time under a certain environment. The diluted sample solution is cultured for the predetermined time. Although the predetermined time is described as five days defined in the JIS standard, it may be changed as appropriate.

(Removal process)
Next, the removal process will be described.

  The day of the week racks 20a to 20e of the storage 2 each have a conveyor function, and the storage container 54 supplied from the D1 measuring device 3 is connected to the end of the D5 measuring device 4 from the end of the D1 measuring device 3 side. Are moved in sequence. By this movement, the storage container 54 that stores the sample liquid whose D1 value has been measured gradually approaches the D5 measuring instrument 4, and the D5 measuring instrument 4 can easily take out the storage container 54.

  In the take-out process, the take-out means 40 takes out the storage container from the day of the week rack. Here, the measurement day of the D5 value is the day of the week five days after the measurement day of the D1 value. For example, when the measurement day of the D1 value is Monday, the D5 value of the sample liquid stored in the storage container 54 needs to be measured on Friday.

  For this reason, the take-out means 40 takes out the storage container 54 from the day of the week rack corresponding to the day of the week five days before the day of measurement of the D5 value among the day of the week racks 20a to 20e. When the measurement day of the D5 value is Friday, the take-out means 40 takes out the storage container 54 from the day of the week rack 20a corresponding to Monday that is five days ago.

  FIG. 7 shows this state. The D5 measuring instrument 4 (extraction means 40) can move in the direction orthogonal to the transport direction of the storage case 2 in the same manner as the D1 measuring instrument 3. By this movement in the orthogonal direction, the take-out means 40 moves to the position of the required day rack and can take out the storage container 54 from the day rack. At this time, the take-out means 40 takes out the storage container 54 from the day of the week rack corresponding to the day of the week five days before the measurement day of the D5 value, so that the measurement day of the D1 value and the measurement day of the D5 value corresponding thereto are mistaken. The BOD value is not calculated.

(D5 measurement process)
Next, the D5 measurement process will be described.

  In the D5 measurement step, the D5 measurement means 41 measures a D5 value that is the dissolved oxygen amount of the sample liquid in the storage container 54 taken out by the take-out means 40.

  FIG. 8 is a schematic diagram showing the D5 measurement process in the first embodiment of the present invention. FIG. 8 shows a state in which the storage container 54 taken out by the take-out means 40 moves into the D5 measurement container and the D5 value of the sample liquid is measured by the D5 measurement means 41.

  The sample liquid in the storage container 54 taken out by the taking-out means 40 is sent to the D5 measuring container 55 of the D5 measuring means 41 in order. FIG. 8 shows a state in which the storage container is sequentially fed to the D5 measurement container 55 of the D5 measurement means 41 in this way.

  Further, the D5 measuring instrument 4 includes an opening mechanism that opens the stopper 54a of the storage container 54. With this opening mechanism, the D5 measuring instrument 4 can open the stopper 54a of the storage container 54 and take out the sample solution contained therein.

  Here, the D5 measuring means 41 measures the D5 value using a dissolved oxygen content measuring instrument of the same type as the measuring method of the known technique used in the D1 measuring means. Further, the D5 measuring means 41 discards the sample liquid in the discharge tank 411 when the measurement of the D5 value is finished. As a result, the D5 measurement container 55 becomes empty.

  Further, the D5 measuring means 41 measures the sample solution in the storage container 54 taken out from the day of week rack corresponding to the day of the week five days before the measurement day of the D5 value taken out by the taking out means 40. The take-out means 40 automatically takes out the storage container from the required day rack while moving vertically with respect to the storage 2. For this reason, the D5 measuring instrument 4 fails to measure the D5 value because it only takes out the storage container 54 already prepared in the storage 2 from the corresponding day rack even on a closed day such as Saturday or Sunday. There is nothing. That is, the operator simply sets the stock solution container 50 for storing the stock solution in the D1 measuring device 3 on the working day from Monday to Friday, and thereafter, the process up to the D5 measurement process is automatically performed. As a result, the D1 value and the D5 value of the sample liquid are measured based on the correct day combination.

  That is, in the D1 measurement process, it is necessary to measure the D1 value of the sample solution on any day of the week from Monday to Friday, and the BOD automatic measurement apparatus 1 must always measure the D1 value on all these days of the week. There is. In this respect, the BOD automatic measuring apparatus 1 automatically measures the D1 value after the sample solution which is the stock solution is installed. Furthermore, the storage container 54 is automatically supplied to any of the day of the week racks 20a to 20e corresponding to the day of the week for measuring the D1 value.

  On the other hand, since the D5 measuring instrument 4 automatically takes out the storage container 54 from the day of the week rack corresponding to five days before the measurement day of the D5 value, even if the measurement day of the D5 value is Saturday or Sunday, there is no problem. The measurement process can measure the D5 value.

  From the above, the D1 measuring device 3 and the D5 measuring device 4 operate independently of each other with the storage 2 having the day-of-week racks 20a to 20e that can be sorted for each measurement day of the D1 value measured. By doing so, the BOD automatic measuring apparatus 1 can measure the BOD value regardless of a holiday such as Saturday or Sunday.

  For this reason, the BOD value of the sample solution is correctly measured. In addition, since the storage 2 executes storage of the storage container and correct delivery from the measurement of the D1 value to the measurement of the D5 value, the BOD automatic measurement device 1 can achieve both work efficiency and work area efficiency. .

  When the D5 value is measured, the D5 measurement unit 41 stores the D5 value as measurement data in the storage unit or prints it on a recording sheet as measurement data.

  In addition, the D5 measuring means 41 calculates from the D5 value and the D1 value, and calculates it as a BOD value. This BOD value indicates the water quality of the sample solution. The D5 measuring means 41 stores the BOD value in the storage unit or prints it on the recording paper, like the D5 value. That is, the D5 measuring unit 41 further includes a BOD calculating unit 42 that calculates a BOD value.

(Discharge process)
The discharge means 43 discharges the storage container 54 from which the sample solution has been extracted to the discharge rack 21 in the discharge step. The discharge rack 21 is provided in the storage 2 and temporarily stores an empty storage container 54 that has become unnecessary after the measurement of the BOD value. The discharge rack 21 sends out the storage container 54 by a conveyor and delivers it to the cleaning process. At this time, the storage container 54 may be automatically sent to the cleaning means for performing the cleaning process by a conveyor, or the operator may carry the storage container 54 to the cleaning means by human work. Here, the sample liquid may or may not remain in the storage container 54, but in any case, the storage container 54 is washed in order to reuse the storage container 54 for subsequent measurements. .

  FIG. 8 also shows a state in which the empty storage container 54 is discharged to the discharge rack 21.

  The discharge rack 21 is provided next to the day of the week rack 20e corresponding to Friday, but may be provided next to the day of the week rack 20a corresponding to Monday, or provided next to each of the day of the week rack 20a and the day of the week rack 20e. May be.

  The discharge rack 21 is also provided with a conveyor mechanism like the day of the week racks 20a to 20e, and transports the received empty storage container 54 (or the magazine 80 for storing it) in a predetermined direction. By this transportation, an operator can send an empty storage container 54 to be discharged to a cleaning process or the like.

(Opening mechanism)
The D5 measuring instrument 4 includes an opening mechanism that opens the stopper 54a of the storage container 54.

  The opening mechanism opens the stopper using the principle of the lever. That is, the opening mechanism includes an arm, and the opening mechanism opens the plug by pressing the fulcrum of the arm against a portion where the storage container 54 and the plug 54a are connected, and expanding the arm according to the fulcrum. . Of course, the opening mechanism may be provided with a member other than the arm and may be opened according to the principle of the lever, or may be opened according to a structure other than the principle of the lever.

  With such an opening mechanism, the D5 measuring instrument 4 can open the stopper 54a of the storage container 54 reliably and easily.

  As described above, the BOD automatic measuring apparatus 1 according to the first embodiment simply installs the stock solution container 50 that stores the sample solution that is the stock solution, and the BOD value of the sample solution can be obtained without causing a measurement day error. Can be measured automatically.

  (Embodiment 2)

  Next, a second embodiment will be described.

  In the second embodiment, a function of handling the measured D1 value, D5 value, and BOD value as measurement data in the BOD automatic measurement apparatus 1 described in the first embodiment will be described.

  FIG. 9 is a block diagram of a BOD automatic measurement apparatus according to Embodiment 2 of the present invention. FIG. 9 shows the BOD automatic measuring apparatus 1 in a simplified manner. The BOD automatic measuring apparatus 1 according to the second embodiment controls at least a part of the D1 measuring device 3, the storage 2 and the D5 measuring device 4 in addition to the elements of the storage 2, the D1 measuring device 3 and the D5 measuring device 4. The control part 100 which performs is further provided. The control unit 100 controls at least a part of the steps included in the BOD automatic measurement apparatus 1 described in the first embodiment.

  Furthermore, the control unit 100 creates and updates a measurement data table corresponding to the D1 measurement container 53 or the D5 measurement container 55 that stores the sample liquid that is the measurement target of the BOD value.

  The stock solution container 50 is distinguished depending on the location and time at which the sample solution is collected. The BOD value needs to be measured separately for each container depending on the location and time of the collected sample liquid. This is because even if the BOD value is measured with the sample liquid attributed differently, the quality of the industrial wastewater or river water from which the sample liquid has been collected has not been measured.

  For this reason, the control part 100 needs to measure a BOD value after specifying that the specific container in each process contains the sample liquid collected at a certain place and time. This is because each of the D1 value, D5 value, and BOD value of the sample solution collected at a certain place or time is sequentially measured in the BOD automatic measuring apparatus 1 over a minimum of 5 days. This is because, when the control unit 100 cannot identify a certain stock solution container 50, it is unclear which sample liquid each corresponds to the measured D1 value, D5 value, and BOD value. . In FIG. 1, the stock solution container 50 is used until the D1 value is measured. Even in this case, the sample solution is stored in the storage container 54 after the measurement of the D1 value. Distinguishes the storage container 54.

  The control unit 100 manages the measurement data table. A measurement data table is shown in FIG. FIG. 10 is an image diagram of the measurement data table according to the second embodiment of the present invention.

  FIG. 10 shows, in order from the top, the measurement data table 101 after the measurement of the D1 value, the measurement data table 102 after the measurement of the D5 value, and the measurement data table 103 after the calculation of the BOD value is completed. Show. As described above, the control unit 100 updates the measurement data table every time measurement is completed in each process.

  The measurement data tables 101 to 103 include identification information 110 for identifying a container in which a specific sample is stored, a D1 value 111, a D5 value 112, and a BOD value 113. In the embodiment of the present invention, identification information of the stock solution container 50 is input to the control unit 100, and the identification information for identifying the storage container 54 is given to the storage container 54 by, for example, sealing or printing. This identification information is obtained by at least one of an ID code, a barcode, a dimensional barcode, and an identification mark.

  The control unit 100 includes a mechanism for reading these codes and the like at the installation base of the storage container supply means 34 on which the storage container 54 is installed, and recognizes the identification information 110 of the storage container 54 by this mechanism. By this recognition, the control unit 100 writes the identification information in the column of the identification information 110 of the measurement data table.

  In FIG. 10, as an example, the display of the identification information “A-1” of the sample solution obtained by diluting the stock solution A at the place where the stock solution is collected is written in the top column of the measurement data tables 101 to 103. It is.

  When the D1 measurement process is completed, the control unit 100 dilutes the stock solution container 50 specified by the identification information “A-1” and writes the D1 value of the sample solution stored in the D1 measurement container 53 in the measurement data table. . The measurement data table is updated to the measurement data table 101 by writing the D1 value. In FIG. 10, the value “3.0” is written as the D1 value in the measurement data table 101.

  Next, when the D5 measurement process is completed, the control unit 100 uses the D5 value of the sample liquid transferred from the D1 container 53 specified by the identification information “A-1” and stored in the storage container 54 as the measurement data. Write to Table 101. The measurement data table 101 is updated to the measurement data table 102 by writing the D5 value. In FIG. 10, the value “1.5” is written in the measurement data table 102 as the D5 value.

  Further, when the calculation process is completed, the control unit 100 writes the BOD value of the storage container 54 specified by the identification information “A-1” in the measurement data table 102. The measurement data table 102 is updated to the measurement data table 103 by writing the BOD value. In FIG. 10, the value “0.75” is written as the BOD value in the measurement data table 103. The value “0.75” is a value calculated from the D5 value and the D1 value using an expression defined in the JIS standard.

  Finally, the control unit 100 updates the measurement data table in this way, and outputs the measurement data table 103 in which the BOD value is written as the final result.

  Further, the control unit 100 stores the measurement data table in the storage unit 105. At this time, it is preferable to store in the storage unit 105 every time the measurement data table is updated. Moreover, the control part 100 displays a measurement data table | surface on a display screen as needed. This is because the measurement data table is displayed on the display screen, so that the operator can visually recognize the measurement result. Of course, the control unit 100 may print the measurement data table on a recording sheet.

  In this way, the control unit 100 improves usability by providing the measured BOD value (or the D1 value or D5 value in the process) to the worker. As a result, the operator can grasp the result according to the processing process of the BOD automatic measuring apparatus 1.

  Further, the BOD automatic measuring apparatus 1 described in the first and second embodiments may be grasped as a BOD automatic measuring system including each element and each process described in the first and second embodiments.

  That is, the BOD automatic measurement system measures the D1 value, which is an example of the first value of the sample liquid, and the storage for storing the sample liquid after measuring the first value until the second value is measured. A first measuring device; and a second measuring device that takes out the sample liquid from the storage and measures the second value. This storage has a plurality of day-of-week racks for storing the sample solution for each day of the week when the first value is measured.

  The first measuring device includes a diluting means for diluting the sample liquid at a predetermined magnification, a waiting means for waiting for the sample liquid diluted by the diluting means for a predetermined time or more, and a first of the sample liquid waited by the waiting means. And a supply means for injecting the sample solution measured by the first measurement means into the container and supplying the container to the day rack.

  The second measuring device takes out the container from the day of the week rack corresponding to the day of the week on which the D5 value, which is an example of the second value, and samples the sample liquid from the container taken out by the taking out means. Second measuring means for measuring the value of.

  In addition, the second measuring device includes a BOD calculating unit that calculates a BOD value for evaluating the water quality of the sample liquid based on the D1 value that is the first value and the D5 value that is the second value.

  The BOD automatic measurement system having these elements can calculate the BOD value of the sample liquid by automatically processing all the steps only by installing the sample liquid as the stock solution. The calculated result is provided to the user together with other element data.

  Similarly, the BOD automatic measuring apparatus 1 described in the first and second embodiments may be grasped as a BOD automatic measuring method for measuring a BOD value while using a predetermined element.

  That is, the BOD automatic measurement method measures the D1 value, which is an example of the first value of the sample liquid, and the storage for storing the sample liquid after measuring the first value until the second value is measured. A first measuring device; and a second measuring device that takes out the sample liquid from the storage and measures the second value. This storage has a plurality of day-of-week racks for storing the sample solution for each day of the week when the first value is measured.

  The first measuring device includes a diluting step for diluting the sample solution at a predetermined magnification, a waiting step for waiting for the sample solution diluted in the diluting step for a predetermined time or more, and a first of the sample solution waiting in the waiting step. A first measurement step of measuring the value of the sample, and a supply step of injecting the sample solution measured in the first measurement step into the container and supplying the container to the day rack.

  The second measuring device takes out the container from the day of the week rack corresponding to the day of the week on which the D5 value that is an example of the second value is measured, collects the sample liquid from the container taken out in the taking out step, A second measuring step for measuring the value of.

  In addition, the second measuring apparatus includes a BOD calculating step of calculating a BOD value for evaluating the water quality of the sample liquid based on the D1 value that is the first value and the D5 value that is the second value.

  The BOD automatic measuring method including these elements can calculate the BOD value of the sample liquid by automatically processing all the steps only by installing the sample liquid that is a stock solution. The calculated result is provided to the user together with other element data.

  In the present specification, for the description of the embodiments of the present invention, terms indicating a container such as a stock solution container, a dilution container, each measurement container, and a storage container are used. Thus, it is not necessary to strictly distinguish each, and in the actual measurement of the D1 value and the measurement of the D5 value, which container contains the target sample liquid is related to the gist of the present invention. At least, a container that can clearly distinguish at least a sample solution that is a stock solution and a diluted sample solution may be used. In addition, the BOD automatic measuring apparatus includes a step of cleaning using cleaning water when the sample liquid in each container and piping is discharged, and a known technique may be used as the method.

  As described above, the BOD automatic measurement device, the BOD automatic measurement system, and the BOD automatic measurement method described in the first and second embodiments are examples for explaining the gist of the present invention, and modifications are made without departing from the gist of the present invention. And including modifications.

DESCRIPTION OF SYMBOLS 1 BOD automatic measuring apparatus 2 Storage 3 D1 measuring device 30 Storage container installation means 31 Dilution means 311 Dilution tank 312 Dilution liquid supply part 313 Stock solution supply part 32 Waiting means 33 D1 measurement means 34 Storage container supply means 35 Refilling means 36 Seal plug means 37 Supply means 4 D5 measuring instrument 41 Extraction means 411 Waste liquid tank 42 D5 measurement means 43 Discharge means 44 BOD calculation means 20a, 20b, 20c, 20d, 20e Day of week rack 21 Discharge rack 50 Stock solution container 51 Dilution containers 52, 52a, 52b, 52c Standby container 53 D1 measurement container 54 Storage container 55 D5 measurement container 60 Sample solution 61 Diluent 80 Magazine 100 Control unit 101, 102, 103 Measurement data table 105 Storage unit 110 Identification information 111 D1 value 112 D5 value 113 BOD value

Claims (13)

A storage for storing the sample solution after measuring the first value until the second value is measured,
A first measuring device for measuring a first value of the sample liquid;
A second measuring device for taking out the sample liquid from the storage and measuring the second value;
With
The storage is
A plurality of day-of-week racks for storing a sample solution for each day of the week when the first value is measured;
The first measuring device includes:
Dilution means for diluting the sample solution at a predetermined magnification;
Standby means for waiting the sample solution diluted by the dilution means for a predetermined time or more;
First measuring means for measuring the first value of the sample liquid kept on standby by the waiting means;
Supply means for injecting the sample solution measured by the first measuring means into a container and supplying the container to the day of the week rack;
The second measuring device is
Taking-out means for taking out the container from the day-of-week rack corresponding to the day of the week for measuring the second value;
An automatic measuring device comprising: a second measuring means for collecting a sample solution from the container taken out by the taking-out means and measuring the second value.   The first measuring device and the storage are connected to be able to deliver the container, and the storage and the second measuring device are connected to be able to deliver the container, the supply means and the take-out The BOD automatic measuring device according to claim 1, wherein the means automatically executes a process based on the storage.   The BOD automatic measuring device according to claim 1 or 2, wherein the storage unit moves the container from the first measuring device side to the second measuring device side on the day of the week rack.   The BOD automatic measuring device according to any one of claims 1 to 3, wherein the storage further includes a discharge rack that separates and stores containers for which the second value has been measured.   The BOD automatic measuring apparatus according to any one of claims 1 to 4, wherein the diluting means dilutes the sample solution at a predetermined magnification.   The said waiting | standby means has a conveyor which moves the diluted said sample liquid to the said 1st measurement means side, The time required for the said conveyor to move is more than predetermined time, The any one of Claim 1 to 5 BOD automatic measuring device.   The BOD automatic measuring device according to any one of claims 1 to 6, wherein the first measuring device further includes a container supplying unit that automatically supplies the container to the supplying unit. The supply means includes a closing mechanism that automatically closes the stopper of the container,
The BOD automatic measuring device according to any one of claims 1 to 7, wherein the take-out means includes an opening mechanism for automatically opening the stopper of the container.   The BOD automatic measuring device according to any one of claims 4 to 8, wherein the second measuring unit further includes a discharging unit that discharges the container, for which the second value has been measured, to the discharge rack.   The said 2nd measuring apparatus is further provided with the BOD calculation means which calculates the BOD value of the diluted said sample liquid based on said 1st value and said 2nd value. BOD automatic measuring device. A controller for controlling at least a part of the first measuring device, the storage, and the second measuring device;
The control unit updates the measurement data table corresponding to the container,
The measurement data table is
In the first measuring device, the first value in the container is added,
The BOD automatic measuring device according to any one of claims 1 to 10, wherein in the second measuring device, the second value and the BOD value in the container are added. The measurement data table further includes identification information for identifying the container,
The BOD automatic measuring apparatus according to claim 11, wherein the identification information is recognized by at least one of an ID code, a barcode, a two-dimensional barcode, and an identification mark provided in the container. A storage for storing the sample liquid after measuring the first value until the second value is measured, a first measuring device for measuring the first value of the sample liquid, and the sample liquid Using a second measuring device that takes out from the storage and measures the second value;
The storage uses a plurality of day racks for storing the sample solution for each day of the week when the first value is measured,
In the first measuring device,
A dilution step of diluting the sample solution at a predetermined magnification;
A standby step of waiting for the sample solution diluted in the dilution step for a predetermined time or more;
A first measurement step of measuring a first value of the sample liquid that has been waited in the standby step;
Supplying the sample solution measured in the first measurement step into a container and supplying the container to the day of the week rack,
In the second measuring device,
Taking out the container from the rack corresponding to the day of the week for measuring the second value;
Collecting a sample liquid from the container taken out by the take-out means, and measuring a second value;
A BOD automatic measurement method in which a BOD calculation step of calculating a BOD value of the sample solution based on the first value and the second value is executed.