Display device, water quality meter management system, display method, and program

Abstract

This display device comprises: a storage unit that stores a state value which indicates the state of a water quality meter; and a display unit that displays the state of the water quality meter. The display unit comprises a graph display unit that displays, as a graph, the state value stored by the storage unit.

Description

[Technical Field]

[0001] The present application relates to a display device, a water quality meter control system, and a display method. [Background technology]

[0002] Conventionally, for example, display devices have been provided with a display unit that displays measurements taken by a water quality meter (for example, a pH meter, a DO meter, or a conductivity meter) (for example, Patent Documents 1 and 2). However, in water treatment systems (water purification systems, wastewater treatment systems), for example, it is necessary to manage the state of the water quality meter so that the measurements of the water quality meter are accurate. Therefore, there is a demand for a display device that allows the state of the water quality meter to be visually confirmed in order to manage the state of the water quality meter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2012-184964 [Patent Document 2] Japanese Patent Publication No. 2012-184972 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, an object of the present invention is to provide a display device, a water quality meter management system, and a display method that allow the status of a water quality meter to be visually confirmed. [Means for solving the problem]

[0005] The display device comprises a memory unit that stores status values ​​indicating the status of the water quality meter, and a display unit that displays the status of the water quality meter, and the display unit comprises a graph display unit that displays the status values ​​stored in the memory unit in a graph.

[0006] In addition, the display device may be configured such that the storage unit stores at least three types of the state values, and the graph display unit displays the state values ​​stored in the storage unit in the form of a radar chart.

[0007] In addition, in the display device, the memory unit may store a reference value of the state value, and the graph display unit may display a graph based on the state value stored in the memory unit together with a graph based on the reference value of the state value.

[0008] The display device may further include a past display input unit that inputs instruction information for displaying the past state values ​​stored in the memory unit, and the graph display unit may be configured to display the past state values ​​stored in the memory unit in a graph when the instruction information is input to the past display input unit.

[0009] In addition, in the display device, the graph display unit may be configured to display, when the instruction information is input to the past display input unit, a graph based on the past state values ​​stored in the memory unit and a graph based on the current state values ​​stored in the memory unit together.

[0010] The display device may further include a future display input unit that inputs instruction information to display the future state value, and the graph display unit may be configured to display the future state value calculated based on the state value stored in the memory unit in a graph when the instruction information is input to the future display input unit.

[0011] In addition, in the display device, the graph display unit may be configured to display, when the instruction information is input to the future display input unit, a graph based on the calculated future state value and a graph based on the current state value stored in the memory unit together.

[0012] In addition, in the display device, the memory unit may store multiple types of state values, and the display unit may be configured to include a comprehensive judgment display unit that displays the results of the state of the water quality meter being judged based on all types of state values, and an individual judgment display unit that displays the results of the state of the water quality meter being judged based on some types of state values.

[0013] The display device may further include an instrument selection input unit that inputs instruction information for selecting the water quality meter to be displayed on the display unit from a plurality of water quality meters, and an individual judgment display input unit that inputs instruction information for displaying the judgment result of the individual judgment display unit, wherein the display unit displays a reference screen when instruction information for selecting the water quality meter is input to the instrument selection input unit, and when the display unit displays the reference screen, the overall judgment display unit displays information and the individual judgment display unit does not display information; the instruction information can be input to the individual judgment display input unit, and the individual judgment display unit displays information when the instruction information is input to the individual judgment display input unit.

[0014] In addition, in the display device, the display unit may further include an individual judgment display unit that displays the results of the judgment of the state of the water quality meter based on standard deterioration data indicating the relationship between the predicted value of the state value and time, and the actual measured value of the state value and time.

[0015] The water quality meter management system also includes at least one water quality meter and the display device.

[0016] The display method is a method for displaying the status of a water quality meter executed by at least one computer, and includes storing a status value indicating the status of the water quality meter, and displaying the stored status value in a graph to display the status of the water quality meter. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram of a water quality meter control system according to one embodiment. [Figure 2] FIG. 2 is a control block diagram of the display device according to the embodiment. [Figure 3] FIG. 3 is a diagram showing a reference screen of the display device according to the embodiment. [Figure 4] FIG. 4 is a diagram showing a situation in which an instrument to be displayed on the display device according to the embodiment is selected. [Figure 5] FIG. 5 is a diagram showing a situation in which past state values ​​are displayed on the display device according to the embodiment. [Figure 6] FIG. 6 is a diagram showing a situation in which the current state value and the past state value are displayed on the display device according to the embodiment. [Figure 7] FIG. 7 is a diagram showing a situation in which a future state value is displayed on the display device according to the embodiment. [Figure 8] FIG. 8 is a diagram showing a situation in which the current state value and the future state value are displayed on the display device according to the embodiment. [Figure 9] FIG. 9 is a diagram showing a situation in which the individual judgment results are displayed on the display device according to the embodiment. [Figure 10] FIG. 10 is an explanatory diagram of the determination method for the display device according to the embodiment, showing initial reference degradation data. [Figure 11] FIG. 11 is an explanatory diagram of the determination method of the display device according to the embodiment, showing the determination at the time of the first calibration after use. [Figure 12] FIG. 12 is an explanatory diagram of the determination method for the display device according to the embodiment, showing reference deterioration data after the first calibration after use. [Figure 13] FIG. 13 is an explanatory diagram of the determination method of the display device according to the embodiment, showing the determination at the time of the second calibration after use. [Figure 14] FIG. 14 is a diagram showing a display screen of a display device according to another embodiment of the present invention. [Figure 15] FIG. 15 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. [Figure 16] FIG. 16 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. [Figure 17] FIG. 17 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. [Figure 18] FIG. 18 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of a water quality meter management system and a display device will be described below with reference to Figures 1 to 13. Note that in each figure (as well as Figures 14 to 18), the dimensional ratios in the drawings do not necessarily match the actual dimensional ratios, and the dimensional ratios between the drawings do not necessarily match either.

[0019] 1, a water quality meter management system 10 can be used to manage a water quality meter 11 used in a water treatment system. Also, although not particularly limited thereto, for example, the water quality meter management system 10 may include the water quality meter 11, a storage device 12 that stores information such as the measurement values ​​and status values ​​of the water quality meter 11, and a control device 13 that controls the entire system.

[0020] The devices 1, 12, 13 and the multiple water quality meters 11 can communicate with each other via communication means 14, such as wireless communication means and wired communication means (e.g., wired LAN, communication cable, etc.). Examples of wireless communication means include the Internet, Bluetooth, and wireless LAN.

[0021] There are no particular limitations on the water quality meter 11, as long as it is an instrument that measures values ​​related to water. Examples of the water quality meter 11 include a pH meter, an oxidation-reduction potential (ORP) meter, a fluoride ion meter, an ammonia meter, a dissolved oxygen (DO) meter, a conductivity meter, a resistivity meter, a multi-liquid sludge concentration (MLSS) meter, a turbidity meter, a color meter, and a residual chlorine (residual salt) meter.

[0022] Among the status values ​​that indicate the state of a pH meter (e.g., whether the measured value is accurate, whether maintenance work is required, etc.), status values ​​that can be obtained during calibration include, for example, sensitivity, asymmetry potential, responsiveness, and contamination (e.g., detected by a sensor or visually detected).Furthermore, among the status values ​​of a pH meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, G electrode membrane resistance, liquid junction resistance, contamination (e.g., detected by a sensor or predicted from past data), and the number of days since calibration.

[0023] Among the status values ​​indicating the state of the ORP meter, status values ​​that can be obtained during calibration include, for example, responsiveness, contamination (e.g., detected by a sensor or visually detected), etc. Furthermore, among the status values ​​of the ORP meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, liquid junction resistance, contamination (e.g., detected by a sensor or predicted from past data), number of days since calibration, etc.

[0024] Among the status values ​​indicating the state of the fluoride ion meter, status values ​​that can be obtained during calibration include, for example, sensitivity, asymmetry potential, responsiveness, contamination (e.g., detection by a sensor, visual detection), etc. Furthermore, among the status values ​​of the fluoride ion meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, liquid junction resistance, contamination (e.g., detection by a sensor, prediction from past data), number of days since calibration, etc.

[0025] Among the status values ​​indicating the state of the ammonia meter, status values ​​that can be obtained during calibration include, for example, sensitivity, asymmetry potential, responsiveness, contamination (e.g., detection by a sensor, visual detection), etc. Furthermore, among the status values ​​of the ammonia meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, membrane resistance, contamination (e.g., detection by a sensor, prediction from past data), number of days since calibration, etc.

[0026] Among the status values ​​indicating the state of a diaphragm-type DO meter, status values ​​that can be obtained during calibration include, for example, the zero point, span point, responsiveness, etc. Furthermore, among the status values ​​of a diaphragm-type DO meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, the number of days since calibration.

[0027] Among the status values ​​indicating the state of an optical DO meter, status values ​​that can be obtained during calibration include, for example, the zero point, span point, responsiveness, etc. Furthermore, among the status values ​​of an optical DO meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, membrane life (usage time), number of days since calibration, etc.

[0028] Among the status values ​​indicating the state of the conductivity meter, status values ​​that can be obtained during calibration include, for example, responsiveness, contamination (e.g., detected by a sensor or visually), etc. Furthermore, among the status values ​​of the conductivity meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, the fluctuation range of the sample temperature.

[0029] Among the status values ​​indicating the state of the resistivity meter, status values ​​that can be obtained during calibration include, for example, responsiveness, contamination (e.g., detection by a sensor, visual detection), etc. Furthermore, among the status values ​​of the resistivity meter, status values ​​that can be obtained during water quality measurement regardless of calibration include, for example, the fluctuation range of the sample temperature, etc.

[0030] Among the status values ​​that indicate the state of the MLSS meter, status values ​​that can be obtained during calibration include, for example, the zero point, span point, etc. Furthermore, among the status values ​​of the MLSS meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, the LED light intensity, the number of days since calibration, etc.

[0031] Among the status values ​​that indicate the state of a turbidity meter, the status values ​​that can be obtained when calibrating include the zero point, span point, etc. Also, among the status values ​​of a turbidity meter, the status values ​​that can be obtained when measuring water quality regardless of calibration include the LED light intensity, cleaning time and number of times (deterioration of wiper rubber), number of days since calibration, etc.

[0032] Among the status values ​​that indicate the state of a colorimeter, those that can be obtained during calibration include, for example, the zero point, span point, responsiveness, etc. Additionally, among the status values ​​of a colorimeter, those that can be obtained while measuring water quality regardless of calibration include, for example, the LED light intensity, cleaning time and number of times (deterioration of wiper rubber), number of days since calibration, etc.

[0033] Among the status values ​​indicating the state of the residual salinity meter, status values ​​that can be obtained during calibration include, for example, the zero point, span point, responsiveness, etc. Furthermore, among the status values ​​of the residual salinity meter, status values ​​that can be obtained while measuring water quality regardless of calibration include, for example, the number of days since the cleaning beads were replaced, the number of days since calibration, etc.

[0034] The display device 1 is a portable terminal device. Although not particularly limited, the display device 1 may be a smart device (smartphone) as in this embodiment. The size of the display device 1 is also not particularly limited, but it is preferable that the display device 1 has a height of 100 to 200 mm, a width of 50 to 100 mm, and a thickness of 5 to 20 mm so that it can be operated with one hand. The display device 1 may also be a tablet computer or a notebook computer.

[0035] Furthermore, although not particularly limited, the storage device 12 may be, for example, a server, etc. Furthermore, although not particularly limited, the control device 13 may be, for example, various types of computers such as a personal computer, etc. Furthermore, the water quality meter 11 and each of the devices 1, 12, 14 may have the same owner, or may have different owners.

[0036] The display device 1 includes an input unit 2 into which information is input, and a display unit 3 that displays information. The configurations of the input unit 2 and the display unit 3 are not particularly limited, but in this embodiment, since the display device 1 is a smart device, the input unit 2 includes a touch panel 2a and buttons 2b, and the display unit 3 includes a display 3a.

[0037] The touch panel 2a is formed to be transparent and is disposed on the surface of the display 3a, and the display on the display 3a can be seen through the touch panel 2a. Although not particularly limited, the display device 1 may also include a sound output unit 4 that outputs sound, as in this embodiment.

[0038] Furthermore, although not particularly limited, the water quality meter 11 and each of the devices 12, 13 may, for example, be equipped with an input unit into which various data are input, or may, for example, be equipped with an acquisition unit that acquires various data, or may, for example, be equipped with an output unit that outputs various data. In the water quality meter management system 10, the input units 2 of each of the devices 1, 11-13 are collectively referred to as input devices, and the output units (including the display unit 3 and sound output unit 4) of each of the devices 1, 11-13 are collectively referred to as output devices.

[0039] 2, the display device 1 includes a control unit 5 that controls the units 2 to 4, and a communication unit (e.g., an antenna) 6 that transmits and receives information to and from external devices 11 to 13. The control unit 5 includes an acquisition unit 51 that acquires information, a storage unit 52 that stores the information, a calculation unit 53 that calculates the information, and a determination unit 54 that makes a determination based on the information. The control unit 5 also includes an input control unit 55 that controls the input unit 2, a display control unit 56 that controls the display unit 3, and an audio output control unit 57 that controls the audio output unit 4.

[0040] The control unit 5 is a computer including a processor such as a CPU and an MPU (for example, a calculation unit 53, a determination unit 54, and each of the control units 55 to 57), a memory such as a ROM and a RAM (for example, a storage unit 52), various interfaces (for example, an acquisition unit 51), etc. The processor executes a program stored in the memory, and the units 53 to 57 of the control unit 5 are realized by the software and hardware working together.

[0041] In addition, in this embodiment, the respective units 53 to 57 of the control unit 5 are realized by a processor in one computer, namely the display device 1, executing processing by one processor, but the present invention is not limited to such a configuration. For example, the respective units 53 to 57 of the control unit 5 may be realized by processors in multiple computers, such as the display device 1 and the control device 13, that is, by multiple processors executing processing in a distributed manner.

[0042] Specifically, at least a part of the calculation unit 53, the determination unit 54, and the control units 55 to 57 of the control unit 5 of the display device 1 according to this embodiment may be provided in another device (for example, but not limited to, the control device 13 in FIG. 1). Also, at least a part of the storage unit 52 of the control unit 5 of the display device 1 according to this embodiment may be provided in another device (for example, but not limited to, the storage device 12 and the control device 13 in FIG. 1).

[0043] The memory unit 52 stores the status values ​​of the water quality meter 11 acquired by the acquisition unit 51. There is no particular limit to the number of types of status values ​​stored in the memory unit 52, but for example, as in this embodiment, the memory unit 52 may store at least three types of status values ​​for one water quality meter 11. Furthermore, the memory unit 52 stores not only the current status value (hereinafter also referred to as the "current status value"), but also past status values ​​(hereinafter also referred to as the "past status value").

[0044] The storage unit 52 also stores a reference value for the status value of the water quality meter 11. The reference value is not particularly limited as long as it is a value for understanding the status of the water quality meter 11, and may be, for example, a value indicating that maintenance work is required, or may be, for example, a value indicating that caution is required. The reference value may be, for example, a value input by the input unit 2, or a value calculated by the calculation unit 53.

[0045] The calculation unit 53 calculates a future state value (hereinafter also referred to as a "future state value") based on the state value stored in the memory unit 52. This makes it possible to predict the future state of the water quality meter 11. Note that the method for calculating the future state value is not particularly limited as long as it is calculated based on the current state value and the past state value.

[0046] The judgment unit 54 includes a comprehensive judgment unit 54a that judges the state of a given water quality meter 11 based on the state values ​​of all types of the water quality meter 11, and an individual judgment unit 54b that judges the state of the water quality meter 11 based on the state values ​​of some types of the water quality meter 11. The judgment unit 54 also includes an input judgment unit 54c that judges instruction information based on information input to the input unit 2.

[0047] Next, the configuration of the input unit 2 and the display unit 3 will be described with reference to Figures 2 and 3. Note that Figure 3 shows, as an example, a screen indicating the state of the pH meter, which is a reference screen. In Figure 3 (similarly to Figures 4 and onwards), the dashed lines are lines that are not actually displayed and indicate the areas of each part.

[0048] The input unit 2 includes a meter selection input unit 21 that inputs instruction information for selecting a water quality meter 11 to be displayed on the display unit 3 from the multiple water quality meters 11. The input unit 2 also includes a previous display input unit 22 that inputs instruction information for displaying a state value for the previous time period relative to the state value displayed on the display unit 3, a subsequent display input unit 23 that inputs instruction information for displaying a state value for the next time period relative to the state value displayed on the display unit 3, and an individual judgment display input unit 24 that inputs instruction information for displaying the judgment result of the individual judgment unit 54b.

[0049] Although not particularly limited, for example, the instrument selection input unit 21, the front display input unit 22, the rear display input unit 23, and the individual judgment display input unit 24 may each be configured with a touch panel 2a as in this embodiment. Furthermore, although not particularly limited, as in this embodiment, when the display unit 3 displays the reference screen, the input control unit 55 may allow instruction information to be input to the front display input unit 22, the rear display input unit 23, and the individual judgment display unit 34.

[0050] The input unit 2 also includes a reset input unit 25 for inputting instruction information for resetting the display. Although not particularly limited, the reset input unit 25 may be configured, for example, by a touch panel 2a and a button 2b, as in this embodiment.

[0051] The display unit 3 includes a selected meter display unit 31 that displays the type of water quality meter 11 that is currently selected and displayed, and a graph display unit 32 that displays a graph of the status value of the water quality meter 11. The display unit 3 also includes a comprehensive judgment display unit 33 that displays the judgment result of the comprehensive judgment unit 54a, and an individual judgment display unit 34 that displays the judgment result of the individual judgment unit 54b.

[0052] Although not particularly limited, as in this embodiment, when the display unit 3 displays the reference screen, the selected instrument display unit 31, the graph display unit 32, and the overall judgment display unit 33 may be configured to display information by the display control unit 56. Furthermore, although not particularly limited, as in this embodiment, when the display unit 3 displays the reference screen, the individual judgment display unit 34 may not display information.

[0053] The display unit 3 is provided with an input information display unit 35 that displays the content and position of information that can be input to the input unit 2. Although not particularly limited, as in this embodiment, when the display unit 3 displays the reference screen, the input information display unit 35 may be configured to display the content and position of the front display input unit 22 and the rear display input unit 23 by the display control unit 56.

[0054] The graph display unit 32 displays a radar chart graph based on the status value of the water quality meter 11 together with a radar chart graph based on the reference value of the status value. This makes it easy to visually check the status of the water quality meter 11, and also makes it possible to compare the status value of the water quality meter 11 with the reference value, making it possible to grasp the status of the water quality meter 11.

[0055] 3 (similarly in FIG. 4 and subsequent figures), the radar chart graph of the reference value is indicated by a dashed line. Furthermore, although not particularly limited, for example, the graph display unit 32 may be configured to change the color or flash the name of a status value that should be noticed (for example, a status value close to the reference value or a status value lower than the reference value).

[0056] The input unit 2 includes a past display input unit 26 for inputting instruction information for displaying past state values, a present display input unit 27 for inputting instruction information for displaying present state values, and a future display input unit 28 for inputting instruction information for displaying future state values.

[0057] The forward display input unit 22 and the backward display input unit 23 also function as the past display input unit 26, the present display input unit 27, and the future display input unit 28. For example, as shown in FIG. 3, when the graph display unit 32 displays a graph of the current state value, the forward display input unit 22 also functions as the past display input unit 26, and the backward display input unit 23 also functions as the future display input unit 28.

[0058] Furthermore, for example, when the graph display unit 32 displays a graph of past state values ​​for the time immediately preceding the current value (latest value) (see FIGS. 5(b) and 6(b)), the previous display input unit 22 also functions as the past display input unit 26, and the next display input unit 23 also functions as the current display input unit 27. Furthermore, for example, when the graph display unit 32 displays a graph of past state values ​​for the time two or more times preceding the current value (latest value), the previous display input unit 22 and the next display input unit 23 also function as the past display input unit 26.

[0059] Furthermore, for example, when the graph display unit 32 displays a graph of the future state value one time after the current value (latest value) (see FIGS. 7(b) and 8(b)), the forward display input unit 22 is also the current display input unit 27, and the backward display input unit 23 is also the future display input unit 28. Furthermore, for example, when the graph display unit 32 displays a graph of the future state value two or more times after the current value (latest value), the forward display input unit 22 and the backward display input unit 23 are each also the future display input unit 28.

[0060] For example, at least a part of the input unit 2 of the display device 1 may be provided in another device (for example, but not limited to, the water quality meter 11 or the control device 13 in FIG. 1). Also, for example, at least a part of the display unit 3 of the display device 1 may be provided in another device (for example, but not limited to, the water quality meter 11 or the control device 13 in FIG. 1).

[0061] Next, an operation for selecting the water quality meter 11 to be displayed on the display unit 3 of the display device 1 according to this embodiment will be described with reference to FIG.

[0062] For example, when the power supply of the display device 1 is turned on, the display unit 3 displays the start screen. Note that the display unit 3 may also display the start screen when, for example, no information is input to the input unit 2 for a predetermined time, and then the display of the display unit 3 is turned off, and then information is input to the input unit 2. Also, for example, the display unit 3 may display the start screen when reset instruction information is input to the button 2b (reset input unit 25).

[0063] 4(a), when the display unit 3 displays the start screen, the input control unit 55 enables the instrument selection input unit 21 to input instruction information. Furthermore, when the display unit 3 displays the start screen, the input information display unit 35 displays the content and position of the instrument selection input unit 21.

[0064] Then, for example, as shown in Fig. 4(a), when instruction information to select a pH meter is input to the meter selection input unit 21, the display unit 3 displays the standard screen for the pH meter as shown in Fig. 4(b). In this way, when instruction information to select a water quality meter 11 is input to the meter selection input unit 21, the display unit 3 displays the standard screen for that water quality meter 11.

[0065] Next, an operation for displaying a graph of past state values ​​on the graph display section 32 of the display device 1 according to this embodiment will be described with reference to FIGS.

[0066] The first example will be described with reference to FIG.

[0067] As shown in Fig. 5(a), when a graph of the current state value is displayed on the graph display unit 32, instruction information is input to the previous display input unit 22 (past display input unit 26). Based on this, the graph display unit 32 displays a graph of the past state value one time before the currently displayed current state value, as shown in Fig. 5(b). This makes it possible to check the past state of the water quality meter 11, and therefore to understand the state of the water quality meter 11.

[0068] In Fig. 5(b), the graph of the past state value is a graph of the state value one day ago. Also, for example, if instruction information is further input to the previous display input unit 22 (past display input unit 26) from the state of Fig. 5(b), the graph display unit 32 displays a graph of the past state value one time before the currently displayed past state value (for example, the state value one day ago) (for example, the state value two days ago).

[0069] The second example will be described with reference to FIG.

[0070] As shown in Fig. 6(a), when a graph of the current state value is displayed on the graph display unit 32, instruction information is input to the previous display input unit 22 (past display input unit 26). Based on this, the graph display unit 32 displays a graph of the past state value for the time immediately preceding the currently displayed current state value, superimposed on the graph of the current state value, as shown in Fig. 6(b). This makes it possible to compare the current state value with the past state value, making it easy to understand the state of the water quality meter 11.

[0071] 6(b), the graph of the past state value is a graph of the state value one day ago, and is shown by a two-dot chain line. Furthermore, for example, if instruction information is further input to the previous display input unit 22 (past display input unit 26) from the state of FIG. 6(b), the graph display unit 32 displays a graph of the past state value one time ago (for example, the state value two days ago) from the currently displayed past state value (for example, the state value one day ago) superimposed on the graph of the past state value one time ago and the graph of the current state value.

[0072] It should be noted that, for example, a setting screen may be used to set which display method to adopt between the method of displaying only one state value as in the first example of Fig. 5 and the method of displaying multiple state values ​​as in the second example of Fig. 6. Furthermore, for example, the input determination unit 54c may determine instruction information based on differences in operations on the input unit 2 (for example, differences between touch and slide, differences in slide direction, differences in touch duration, etc.), and may select the display method according to the first example of Fig. 5 or the display method according to the second example of Fig. 6.

[0073] Next, an operation for displaying a graph of the future state value calculated by the calculation unit 53 on the graph display unit 32 of the display device 1 according to this embodiment will be described with reference to FIGS.

[0074] The first example will be described with reference to FIG.

[0075] As shown in Fig. 7(a), when a graph of the current state value is displayed on the graph display unit 32, instruction information is input to the future display input unit 23 (future display input unit 28). Based on this, the graph display unit 32 displays a graph of the future state value one time after the currently displayed current state value, as shown in Fig. 7(b). This makes it possible to check the future state of the water quality meter 11, and therefore to predict the state of the water quality meter 11.

[0076] 7(b), the graph of the future state value is a graph of the state value one day later. Also, for example, if instruction information is further input to the future display input unit 23 (future display input unit 28) from the state of FIG. 7(b), the graph display unit 32 displays a graph of the future state value one time later (for example, the state value two days later) from the currently displayed future state value (for example, the state value one day later).

[0077] The second example will be described with reference to FIG.

[0078] As shown in Fig. 8(a), when a graph of the current state value is displayed on the graph display unit 32, instruction information is input to the future display input unit 23 (future display input unit 28). Based on this, the graph display unit 32 displays a graph of the future state value one time after the currently displayed current state value, superimposed on the graph of the current state value, as shown in Fig. 8(b). This makes it possible to compare the current state value with the future state value, making it easy to predict the state of the water quality meter 11.

[0079] In Fig. 8(b), the graph of the future state value is a graph of the state value one day later, and is shown by a two-dot chain line. Furthermore, for example, if instruction information is further input to the future display input unit 23 (future display input unit 28) from the state of Fig. 8(b), the graph display unit 32 displays a graph of the future state value one time later (e.g., the state value two days later) from the currently displayed future state value (e.g., the state value one day later), superimposed on the graph of the future state value one time later and the graph of the current state value.

[0080] It should be noted that, for example, a setting screen may be used to set which display method to adopt between the method of displaying only one state value as in the first example of Fig. 7 and the method of displaying multiple state values ​​as in the second example of Fig. 8. Furthermore, for example, the input determination unit 54c may determine instruction information based on differences in operations on the input unit 2 (for example, differences between touch and slide, differences in slide direction, differences in touch duration, etc.), and may select the display method according to the first example of Fig. 7 or the display method according to the second example of Fig. 8.

[0081] Moreover, the combined display of the graph of future state values ​​and the graph of current state values ​​in Fig. 8 may be used in conjunction with the combined display of the graph of past state values ​​and the graph of current state values ​​in Fig. 6. That is, the graph display unit 32 may display the graph of past state values, the graph of current state values, and the graph of future state values ​​together.

[0082] Next, an operation for displaying information on the individual judgment display unit 34 of the display device 1 according to this embodiment will be described with reference to FIG.

[0083] For example, as shown in Fig. 9(a), when the display unit 3 displays the standard screen, the overall judgment display unit 33 displays the judgment result of the overall judgment unit 54a. This displays the state of the water quality meter 11 judged based on all types of status values, making it possible to grasp the overall state of the water quality meter 11. Therefore, for example, the standard screen can provide the minimum necessary important information, making it an effective display method.

[0084] On the other hand, when instruction information is input to the individual judgment display input unit 24 as shown in Fig. 9(a), the individual judgment display unit 34 displays the judgment result of the individual judgment unit 54b as shown in Fig. 9(b). As a result, the state of the water quality meter 11 is displayed based on some types of state values, so that the detailed state of the water quality meter 11 can also be grasped.

[0085] For example, as shown in Fig. 9(a), when instruction information for "sensitivity" is input to the individual judgment display input unit 24, the individual judgment display unit 34 displays the state of the water quality meter 11 determined based on some types of state values ​​including "sensitivity." In this way, the individual judgment display unit 34 displays the state of the water quality meter 11 determined based on the instructed state value, as shown in Fig. 9(b).

[0086] As shown in Figure 9(b), when the display unit 3 displays a modified screen that has been modified from a portion of the standard screen, the individual judgment display unit 34 displays information. That is, the individual judgment display unit 34 is displayed in a so-called pop-up format. In Figure 9(b), the position of the individual judgment display unit 34 on the modified screen is the same as the position of the selected instrument display unit 31 and the overall judgment display unit 33 on the standard screen. Thereafter, by inputting instruction information into the reset input unit 25, the display of the individual judgment display unit 34 is stopped, and the display unit 3 displays the standard screen.

[0087] Here, as an example, the comprehensive determination method and the individual determination method according to this embodiment will be described.

[0088] The individual determination unit 54b determines the work day on which each maintenance work should be performed based on some types of status values. For example, in the case of a pH meter, maintenance work includes "cleaning," "calibration," "electrode replacement," etc., and the individual determination unit 54b determines the work day on which each work should be performed.

[0089] For example, the work date for "cleaning" ("April 22, 2020" in FIG. 9) is determined based on the status values ​​of "contamination," "G membrane resistance," and "liquid junction resistance." Furthermore, for example, the work date for "calibration" ("April 28, 2020" in FIG. 9) is determined based on the status values ​​of "sensitivity" and "asymmetry potential." Furthermore, for example, the work date for "electrode replacement" ("May 15, 2020" in FIG. 9) is determined based on the status values ​​of "sensitivity," "asymmetry potential," "responsiveness," and "contamination."

[0090] Then, the overall judgment unit 54a judges the earliest work date and the work as a judgment result based on the judgment results of the individual judgment unit 54b. That is, the overall judgment unit 54a judges the earliest maintenance work and the work date based on the status values ​​of all types. For example, in FIG. 9, the work date for "cleaning" (April 22, 2020) is the earliest, so the overall judgment display unit 33 displays that information.

[0091] The comprehensive assessment method and the individual assessment method are not limited to these methods. For example, the comprehensive assessment unit 54a may calculate a degree of accuracy of the measurement value of the water quality meter 11, the degree of necessity of maintenance work for the water quality meter 11, etc., based on all types of status values. The method for calculating each degree is not particularly limited, and for example, the sum of values ​​obtained by multiplying each current status value by a coefficient may be used as the degree.

[0092] In short, it is sufficient that the comprehensive judgment unit 54a judges the state of the water quality meter 11 based on all types of state values, and the individual judgment unit 54b judges the state of the water quality meter 11 based on some types of state values. The state of the water quality meter 11 is not particularly limited, and may be an event related to the accuracy of the measurement values ​​of the water quality meter 11, the need for work on the water quality meter 11, etc.

[0093] Here, an example of the determination method of the determination unit 54 will be described with reference to Figures 10 to 13. In Figures 10 to 13, the individual determination unit 54b determines the state of the water quality meter 11 (for example, a pH meter) based on the actual measurement value of one type of state value (for example, sensitivity). Note that the determination method of the determination unit 54 is not limited to this method.

[0094] The storage unit 52 stores initial reference degradation data D1 indicating the relationship between the predicted value of sensitivity (state value) and time, as shown in Fig. 10. For example, the initial reference degradation data D1 can be expressed by a relational expression between the predicted value y1 of sensitivity and time t. For example, it can be expressed by the following expression (y1 and t are variables): y1=f(t)

[0095] Although not particularly limited, in this embodiment, when the sensitivity falls below a limit value (for example, 50%), the water quality meter 11 will no longer be able to measure properly, and the water quality meter 11 will need to be replaced. The predicted time at which the sensitivity will reach the limit value is referred to as the lifetime t0. Furthermore, although not particularly limited, the water quality meter 11 may be calibrated before use.

[0096] 11, at time T1, the first calibration after use is performed and the sensitivity is measured. The actual sensitivity value Y1a at time T1 is then compared with the predicted sensitivity value Y1 at time T1 in the initial reference degradation data D1. Specifically, the individual judgment unit 54b calculates first reference degradation data D2 that indicates the relationship between the predicted sensitivity value y2 after time T1 and time t.

[0097] For example, the predicted value y2 of the sensitivity of the first reference degradation data D2 can be expressed by a relational expression with the predicted value y1 of the sensitivity of the initial reference degradation data D1. For example, it can be expressed by the following expression (y1, y2, t are variables). Note that α is a coefficient (also called the "first degradation coefficient"). Also, "*" in the expression indicates multiplication (the same applies below). y2=α*y1=α*f(t)

[0098] The first deterioration coefficient α is set so that the predicted value y2 of the sensitivity becomes a constant Y1a (measured value) when the time t is a constant T1. In Fig. 11, the initial reference deterioration data D1 is indicated by a dashed line, and the first reference deterioration data D2 is indicated by a two-dot chain line.

[0099] The individual determination unit 54b also calculates a recommended time T2 for the next calibration (second time after use). The recommended time T2 can be expressed by a relational expression with the time T1 for the first calibration after use. For example, it can be expressed by the following expression (T1, T2, ΔT1, and ΔT2 are constants). Note that the time ΔT1 is the interval between the previous calibration, and the time ΔT2 is the interval between the next calibration. ΔT2=(1 / α)*ΔT1=T1 / α Note that ΔT1=(T1-0) and ΔT2=(T2-T1). The following equation is derived from the above equation: T2={(1+α) / α}*T1

[0100] The individual judgment unit 54b also calculates the lifetime T0 (constant) based on the primary reference degradation data D2. In this way, the individual judgment unit 54b can judge the state of the water quality meter 11 based on the recommended time T2 for the next calibration and the lifetime T0. As shown in Fig. 12, the memory unit 52 stores the primary reference degradation data D2 indicating the relationship between the predicted value y2 of sensitivity and time t after the time T1 of the first calibration after use.

[0101] 11 and 12, the first deterioration coefficient α is smaller than 1. This indicates that the actual sensitivity value Y1a at time T1 is better than the predicted sensitivity value Y1, i.e., the actual deterioration rate is slower than the predicted deterioration rate of the initial reference deterioration data D1. As a result, the deterioration rate of the first reference deterioration data D2 is slower than the deterioration rate of the initial reference deterioration data D1, the interval ΔT2 between the next calibrations is longer than the interval ΔT1 between the previous calibrations, and the life time T0 after the change is slower than the life time T0 before the change.

[0102] 13, for example, at time T2, as recommended, a second calibration after use is performed and the sensitivity is measured. The actual sensitivity value Y2a at time T2 is then compared with the predicted sensitivity value Y2 at time T2 in the first reference degradation data D2. Specifically, the individual judgment unit 54b calculates second reference degradation data D3 that indicates the relationship between the predicted sensitivity value y3 after time T2 and time t.

[0103] For example, the predicted value y3 of the sensitivity of the second reference degradation data D3 can be expressed by a relational expression with the predicted value y2 of the sensitivity of the first reference degradation data D2, and can also be expressed by a relational expression with the predicted value y1 of the sensitivity of the initial reference degradation data D1. For example, it can be expressed by the following expression (y1 to y3, t are variables). Note that β is a coefficient (also called the "second degradation coefficient"). y3=β*y2=(α*β)*y1=(α*β)*f(t)

[0104] The second deterioration coefficient β is set so that the predicted value y3 of the sensitivity becomes a constant Y2a (actual measurement value) when the time t is a constant T2. In Fig. 13, the first reference deterioration data D2 is indicated by a dashed line, and the second reference deterioration data D3 is indicated by a two-dot chain line.

[0105] Furthermore, the individual judgment unit 54b calculates a recommended time T3 for the next (third) calibration. Time T3 can be expressed by a relational expression with time T2, and can also be expressed by a relational expression with time T1. For example, it can be expressed by the following expression (T1 to T3, ΔT1 to ΔT3 are constants). Note that time ΔT2 is the interval between the previous calibration, and time ΔT3 is the interval between the next calibration. ΔT3=(1 / β)*ΔT2 Note that ΔT3=(T3-T2) and ΔT2=(T2-T1). The following equation is derived from the above equation: T3=[{(1+α)*(1+β)-α} / (1+α)β]*T2 T3=[{(1+α)*(1+β)-α} / αβ]*T1

[0106] The individual judgment unit 54b also calculates the lifetime T0 based on the second reference degradation data D3. In this way, the individual judgment unit 54b can judge the condition of the water quality meter 11 based on the recommended time T3 for the next calibration and the lifetime T0. Note that, as shown in FIG. 13, if the lifetime T0 is earlier than the recommended time T3 for the next calibration, the individual judgment unit 54b determines that the water quality meter 11 needs to be replaced.

[0107] 13, the second deterioration coefficient β is greater than 1. This indicates that the actual sensitivity value Y2a at time T2 is worse than the predicted sensitivity value Y2, i.e., the actual deterioration rate is faster than the predicted deterioration rate of the primary reference deterioration data D2. As a result, the deterioration rate of the secondary reference deterioration data D3 is slower than the deterioration rate of the primary reference deterioration data D2, the interval ΔT3 between the next calibrations is shorter than the interval ΔT2 between the previous calibrations, and the life time T0 after the change is shorter than the life time T0 before the change.

[0108] 10 to 13 may be performed for multiple types of state values. Specifically, the individual determination unit 54b may calculate the recommended time for the next calibration and the life span based on each state value. The individual determination unit 54b may then determine the earliest time among the multiple recommended times calculated based on the multiple state values ​​as the recommended time for the next calibration, or may determine the earliest time among the multiple life spans calculated based on the multiple state values ​​as the life span.

[0109] As described above, the display method of this embodiment is a method for displaying the status of a water quality meter 11 executed by at least one computer, and includes storing a status value indicating the status of the water quality meter 11, and displaying the stored status value in a graph to display the status of the water quality meter 11.

[0110] The water quality meter management system 10 according to this embodiment includes at least one water quality meter 11 and a display device 1. The display device 1 according to this embodiment includes a memory unit 52 that stores status values ​​indicating the status of the water quality meter 11, and a display unit 3 that displays the status of the water quality meter 11, and the display unit 3 includes a graph display unit 32 that displays the status values ​​stored in the memory unit 52 in a graph.

[0111] With this configuration, the display unit 3 displays the status of the water quality meter 11. The graph display unit 32 displays the status value of the water quality meter 11 in a graph, so the status of the water quality meter 11 can be visually confirmed.

[0112] In addition, in the display device 1 of this embodiment, the memory unit 52 stores at least three types of state values, and the graph display unit 32 displays the state values ​​stored in the memory unit 52 in the form of a radar chart graph.

[0113] With this configuration, the graph display unit 32 displays a radar chart graph based on at least three types of status values, thereby making it possible to easily visually confirm the status of the water quality meter 11.

[0114] Furthermore, in the display device 1 according to this embodiment, the memory unit 52 stores the reference value of the state value, and the graph display unit 32 displays a graph based on the state value stored in the memory unit 52 together with a graph based on the reference value of the state value.

[0115] With this configuration, a graph based on the status value of the water quality meter 11 is displayed together with a graph based on the reference value of the status value, so that the status value of the water quality meter 11 can be compared with the reference value. This allows the status of the water quality meter 11 to be understood.

[0116] In addition, the display device 1 according to this embodiment further includes a past display input unit 26 that inputs instruction information for displaying the past state values ​​stored in the memory unit 52, and the graph display unit 32 is configured to display the past state values ​​stored in the memory unit 52 in a graph when the instruction information is input to the past display input unit 26.

[0117] According to this configuration, past status values ​​are displayed in graph form on the graph display unit 32, making it possible to check the past status of the water quality meter 11. This makes it possible to grasp the status of the water quality meter 11.

[0118] Furthermore, in the display device 1 according to this embodiment, when the instruction information is input to the past display input unit 26, the graph display unit 32 is configured to display both a graph based on the past state values ​​stored in the memory unit 52 and a graph based on the current state values ​​stored in the memory unit 52.

[0119] With this configuration, a graph based on the current status value is displayed together with a graph based on past status values ​​on the graph display unit 32, allowing the current status value to be compared with the past status value, thereby making it easy to understand the status of the water quality meter 11.

[0120] In addition, the display device 1 of this embodiment further includes a future display input unit 28 that inputs instruction information to display the future state value, and the graph display unit 32 is configured to display the future state value calculated based on the state stored in the memory unit 52 in a graph when the instruction information is input to the future display input unit 28.

[0121] According to this configuration, future state values ​​are calculated and displayed in graph form on the graph display unit 32, allowing the user to check the future state of the water quality meter 11. This allows the state of the water quality meter 11 to be predicted.

[0122] Furthermore, in the display device 1 according to this embodiment, when the instruction information is input to the future display input unit 28, the graph display unit 32 is configured to display both a graph based on the calculated future state value and a graph based on the current state value stored in the memory unit 52.

[0123] With this configuration, a graph based on the current state value is displayed together with a graph based on the future state value on the graph display unit 32, allowing the current state value to be compared with the future state value, thereby making it easy to predict the state of the water quality meter 11.

[0124] In addition, the display device 1 of this embodiment is configured such that the memory unit 52 stores multiple types of status values, and the display unit 3 includes a comprehensive judgment display unit 33 that displays the results of the status of the water quality meter 11 being judged based on all types of status values, and an individual judgment display unit 34 that displays the results of the status of the water quality meter 11 being judged based on some types of status values.

[0125] According to this configuration, the state of the water quality meter 11 is judged based on all types of status values, and the judgment results are displayed on the overall judgment display unit 33, making it possible to grasp the overall state of the water quality meter 11. Moreover, the state of the water quality meter 11 is judged based on some types of status values, and the judgment results are displayed on the individual judgment display unit 34, making it possible to grasp the individual states of the water quality meter 11 as well.

[0126] In addition, the display device 1 of this embodiment further includes an instrument selection input unit 21 that inputs instruction information for selecting the water quality meter 11 to be displayed on the display unit 3 from a plurality of water quality meters 11, and an individual judgment display input unit 24 that inputs instruction information for displaying the judgment result on the individual judgment display unit 34.The display unit 3 displays a standard screen when instruction information for selecting the water quality meter 11 is input to the instrument selection input unit 21, and when the display unit 3 displays the standard screen, the overall judgment display unit 33 displays information and the individual judgment display unit 34 does not display information.The instruction information can be input to the individual judgment display input unit 24, and the individual judgment display unit 34 displays information when the instruction information is input to the individual judgment display input unit 24.

[0127] According to this configuration, when the standard screen is displayed, the state of the water quality meter 11 determined based on all types of status values ​​is displayed, making it possible to grasp the overall state of the water quality meter 11. When instruction information is input, the state of the water quality meter 11 determined based on some types of status values ​​is displayed, making it possible to grasp the individual states of the water quality meter 11 as needed.

[0128] In addition, in the display device 1 according to this embodiment, the display unit 3 is further provided with an individual judgment display unit 34 that displays the judgment result based on the reference deterioration data showing the relationship between the predicted value of the state value and time, and the actual measured value of the state value and time.

[0129] With this configuration, the state of the water quality meter 11 is judged based on the reference deterioration data, which indicates the relationship between the predicted value of one type of state value and time, and the actual measured value of that state value and time, and the judgment result is displayed on the individual judgment display unit 34. This makes it possible to understand the individual state of the water quality meter 11 compared with the reference deterioration data.

[0130] The display device 1, water quality meter management system 10, and display method are not limited to the configurations of the above-described embodiments, and are not limited to the above-described effects. Furthermore, the display device 1, water quality meter management system 10, and display method can, of course, be modified in various ways without departing from the spirit of the present invention. For example, it is of course possible to arbitrarily select one or more of the configurations, methods, etc., of the various modified examples described below and employ them in the configurations, methods, etc., of the above-described embodiments.

[0131] (1) In the display device 1 according to the above embodiment, when the display unit 3 displays a modified screen that is a partial modification of the reference screen, the individual judgment display unit 34 displays information in a so-called pop-up format. However, the display device 1 is not limited to this configuration. For example, as shown in FIG. 14 , the individual judgment display unit 34 may be configured to display information when the display unit 3 displays a switching screen that is completely different from the reference screen.

[0132] 14 on the display unit 3 may be, for example, a method in which the switching screen slides from the bottom and is displayed on the display unit 3. Alternatively, for example, the switching screen may slide from the top, left, or right and be displayed on the display unit 3. Furthermore, when the display unit 3 displays the switching screen, not only may the individual judgment display unit 34 display information, but the display unit 3 may also display other information related to the water quality meter 11.

[0133] 14, the display unit 3 may be configured to include a work instruction display unit 36 ​​that displays an explanation of the work content (text, images, video), and a status value explanation display unit 37 that displays a detailed explanation of the status value (text, images, video). When the display unit 3 displays the switching screen, the individual judgment display unit 34, the work instruction display unit 36, and the status value explanation display unit 37 may each display information.

[0134] (2) In addition, in the display device 1 according to the above embodiment, the graph display unit 32 is configured to display graphs of multiple state values ​​in an overlapping manner. However, the display device 1 is not limited to this configuration. For example, as shown in Fig. 15, the graph display unit 32 may be configured to display graphs of multiple state values ​​in a spaced relationship to each other.

[0135] In such a configuration, for example, graph display unit 32 may display a plurality of graphs with different sizes, as shown in Fig. 15. For example, as shown in Fig. 15, input unit 2 may include date and time selection input unit 29 for inputting instruction information for a date and time to be selected, and graph display unit 32 may display the graph of the date and time input to date and time selection input unit 29 larger than the other graphs.

[0136] (3) In addition, in the display device 1 according to the above embodiment, the front display input unit 22 and the rear display input unit 23 are each configured as a dedicated unit, that is, as separate buttons (buttons on the touch panel 2a). However, the display device 1 is not limited to such a configuration. For example, as shown in FIGS. 16 to 18, the front display input unit 22 and the rear display input unit 23 may be configured as a shared unit.

[0137] (3-1) The front display input unit 22 and the rear display input unit 23 according to Fig. 16 are arranged in the same area on the touch panel 2a (for example, the same area as the graph display unit 32). As shown in Fig. 16(a), by touching the area and sliding it to the right, the input determination unit 54c determines that instruction information has been input to the front display input unit 22, and as shown in Fig. 16(b), the graph display unit 32 displays a graph of the state value for the immediately previous time.

[0138] 16(b), the graph display unit 32 may slide and display a graph of the state values ​​for the immediately preceding time so as to be linked to the operation of a finger. In addition, although not shown in the figure, in the configuration of FIG. 16, by touching the area and sliding it to the left, the input determination unit 54c determines that instruction information has been input to the subsequent display input unit 23, and as a result, the graph display unit 32 slides and displays a graph of the state values ​​for the immediately following time.

[0139] (3-2) The front display input unit 22 and the rear display input unit 23 shown in Fig. 17 are arranged in the same area (for example, the bottom area) on the touch panel 2a. As shown in Fig. 17(a), when the knob is touched and slid to the left, the input determination unit 54c determines that instruction information has been input to the front display input unit 22. At this time, when the knob is slid by one scale, as shown in Fig. 17(b), the graph display unit 32 displays a graph of the state value for the immediately previous time.

[0140] 17, when the knob is slid three scale marks to the left, the graph display unit 32 displays a graph of the state values ​​for the time three scale marks earlier. Also, when the knob is touched and slid to the right, the input determination unit 54c determines that instruction information has been input to the subsequent display input unit 23, and the graph display unit 32 displays a graph of the state values ​​for the time three scale marks later than the knob has been moved, although this is not shown.

[0141] (3-3) The front display input unit 22 and the rear display input unit 23 in Fig. 18 are arranged in the same area (for example, the bottom area) on the touch panel 2a. Then, as shown in Fig. 18(a), by touching this area, the area of ​​the front display input unit 22, the rear display input unit 23, and the input information display unit 35 becomes larger. Then, by sliding this area up or down and touching a predetermined date and time, the input determination unit 54c determines whether instruction information has been input to the front display input unit 22 or the rear display input unit 23.

[0142] For example, if the date and time input by touching is earlier than the date and time displayed on the graph display unit 32, the input determination unit 54c determines that instruction information has been input to the front display input unit 22. Conversely, for example, if the date and time is later than the date and time displayed on the graph display unit 32, the input determination unit 54c determines that instruction information has been input to the rear display input unit 23. In the configuration according to Fig. 18, although not shown, the graph display unit 32 displays a graph of the state values ​​at the input date and time.

[0143] (4) Furthermore, in the display device 1 according to the above embodiment, the start screen is configured to be different from the reference screen. However, the display device 1 is not limited to such a configuration. For example, the start screen may be configured to be the reference screen (e.g., the reference screen of the water quality meter 11 that was last displayed). In such a configuration, when the display unit 3 displays the reference screen, instruction information may be input to the meter selection input unit 21.

[0144] (5) Furthermore, the display device 1 according to the above embodiment is configured to include the input unit 2. However, the display device 1 is not limited to this configuration. For example, the display device 1 may be configured not to include the input unit 2.

[0145] (6) Furthermore, in the display device 1 according to the above embodiment, the graph display unit 32 is configured to display both a graph based on the state value and a graph based on the reference value of the state value. However, the display device 1 is not limited to this configuration. For example, the graph display unit 32 may be configured to display only the graph based on the state value without displaying the graph of the reference value.

[0146] (7) In addition, in the display device 1 according to the above embodiment, the graph display unit 32 is configured to display a graph of the current state value, a graph of the past state value, and a graph of the future state value. However, the display device 1 is not limited to this configuration. For example, the graph display unit 32 may be configured not to display at least one of the graph of the past state value and the graph of the future state value.

[0147] (8) Furthermore, in the display device 1 according to the above embodiment, the judgment unit 54 is configured to include a comprehensive judgment unit 54a that judges the state of the water quality meter 11 based on all types of status values, and an individual judgment unit 54b that judges the state of the water quality meter 11 based on some types of status values. However, the display device 1 is not limited to this configuration. For example, the judgment unit 54 may be configured to not include at least one of the comprehensive judgment unit 54a and the individual judgment unit 54b.

[0148] (9) Furthermore, in the display device 1 according to the above embodiment, the display unit 3 is configured to include a comprehensive judgment display unit 33 that displays the judgment result of the comprehensive judgment unit 54a, and an individual judgment display unit 34 that displays the judgment result of the individual judgment unit 54b. However, the display device 1 is not limited to this configuration. For example, the display unit 3 may be configured to not include at least one of the comprehensive judgment display unit 33 and the individual judgment display unit 34.

[0149] (10) Furthermore, in the display device 1 according to the above embodiment, when the display unit 3 displays the reference screen, the overall judgment display unit 33 displays information, and the individual judgment display unit 34 does not display information. However, the display device 1 is not limited to this configuration. For example, when the display unit 3 displays the reference screen, both the overall judgment display unit 33 and the individual judgment display unit 34 may be configured to display information, or neither may be configured to display information.

[0150] (11) Furthermore, the display device 1 according to the above embodiment is configured to be capable of displaying the status of multiple water quality meters 11. However, the display device 1 is not limited to this configuration. For example, the display device 1 may be configured to be capable of displaying the status of only one water quality meter 11.

[0151] (12) In addition, in the display device 1 according to the above embodiment, the graph display unit 32 is configured to display the status values ​​of the water quality meter 11 as a radar chart graph. However, the display device 1 is not limited to this configuration. For example, the graph display unit 32 may be configured to display the status values ​​of the water quality meter 11 as a bar graph, a circular (arc) graph, or the like.

[0152] (13) In addition, in the display device 1 according to the above embodiment, the graph display unit 32 is configured to display a graph based on three or more types of state values. However, the display device 1 is not limited to this configuration. For example, the graph display unit 32 may be configured to display a graph based on one or two types of state values. [Explanation of symbols]

[0153] 1...display device, 2...input section, 2a...touch panel, 2b...button, 3...display section, 3a...display, 4...sound output section, 5...control section, 6...communication section, 10...water quality meter management system, 11...water quality meter, 12...storage device, 13...control device, 14...communication means, 21...meter selection input section, 22...front display input section, 23...rear display input section, 24...individual judgment display input section, 25...reset input section, 26...past display input section, 27...current display input section , 28...Future display input section, 29...Date and time selection input section, 31...Selected instrument display section, 32...Graph display section, 33...Overall judgment display section, 34...Individual judgment display section, 35...Input information display section, 36...Work explanation display section, 37...Status value explanation display section, 51...Acquisition section, 52...Memory section, 53...Calculation section, 54...Judgment section, 54a...Overall judgment section, 54b...Individual judgment section, 54c...Input judgment section, 55...Input control section, 56...Display control section, 57...Audio output control section

Claims

1. a storage unit that stores a status value indicating the status of the water quality meter; a display unit that displays the state of the water quality meter, The display unit includes a graph display unit that displays the state value stored in the storage unit in a graph, the storage unit stores at least three types of the state values; The graph display unit displays the state values ​​stored in the storage unit as a radar chart graph.

2. the storage unit stores a reference value of the state value; The display device according to claim 1 , wherein the graph display unit displays a graph based on the state values ​​stored in the storage unit and a graph based on reference values ​​of the state values ​​together.

3. a past display input unit for inputting instruction information for displaying the past state values ​​stored in the storage unit, The display device according to claim 1 , wherein the graph display unit displays the past state values ​​stored in the storage unit in a graph when the instruction information is input to the past display input unit.

4. 4. The display device according to claim 3, wherein when the instruction information is input to the past display input unit, the graph display unit displays both a graph based on the past state values ​​stored in the memory unit and a graph based on the current state values ​​stored in the memory unit.

5. a storage unit that stores a status value indicating the status of the water quality meter; a display unit that displays the state of the water quality meter, The display unit includes a graph display unit that displays the state value stored in the storage unit in a graph, a future display input unit for inputting instruction information for displaying the future state value; The graph display unit displays the future state value calculated based on the state value stored in the memory unit in a graph when the instruction information is input to the future display input unit.

6. 6. The display device according to claim 5, wherein when the instruction information is input to the future display input unit, the graph display unit displays a graph based on the calculated future state value and a graph based on the current state value stored in the memory unit together.

7. a storage unit that stores a status value indicating the status of the water quality meter; a display unit that displays the state of the water quality meter, The display unit includes a graph display unit that displays the state value stored in the storage unit in a graph, the storage unit stores a plurality of types of the state values; The display device includes a comprehensive judgment display unit that displays the results of the state of the water quality meter being judged based on all types of state values, and an individual judgment display unit that displays the results of the state of the water quality meter being judged based on some types of state values.

8. a meter selection input unit for inputting instruction information for selecting the water quality meter to be displayed on the display unit from among a plurality of water quality meters; an individual judgment display input unit for inputting instruction information for displaying the judgment result on the individual judgment display unit, the display unit displays a standard screen when instruction information for selecting the water quality meter is input to the meter selection input unit, when the display unit displays the reference screen, the comprehensive judgment display unit displays information, the individual judgment display unit does not display information, and the individual judgment display input unit is capable of inputting the instruction information; The display device according to claim 7 , wherein the individual judgment display unit displays information when the instruction information is input to the individual judgment display input unit.

9. a storage unit that stores a status value indicating the status of the water quality meter; a display unit that displays the state of the water quality meter, The display unit includes a graph display unit that displays the state value stored in the storage unit in a graph, The display unit further includes an individual judgment display unit that displays the judgment result based on reference deterioration data indicating the relationship between the predicted value of the state value and time, and the actual measured value of the state value and time.

10. at least one water quality meter; A water quality meter management system comprising: the display device according to any one of claims 1 to 9.

11. A method for displaying the status of a water quality meter, which is executed by at least one computer using the display device according to any one of claims 1 to 9, storing a status value indicating the status of the water quality meter; and displaying the stored status values ​​in a graph to display the status of the water quality meter.

12. A program for causing at least one computer to execute the display method according to claim 11, a program that causes the at least one computer to display the status values ​​stored in the storage unit as a radar chart graph;

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