JP7743399B2 - Display device, water quality meter management system, display method, and program - Google Patents

Description

This application relates to a display device, a water quality meter management system, and a display method.

Conventionally, for example, display devices have been equipped with a display unit that displays measurements taken by a water quality meter (e.g., pH meter, DO meter, conductivity meter) (see, 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 status of the water quality meter to ensure that the measurements from the water quality meter are accurate. Therefore, there is a demand for a display device that allows the status of the water quality meter to be visually confirmed in order to manage the status of the water quality meter.

Japanese Patent Application Publication No. 2012-184964 Japanese Patent Application Publication No. 2012-184972

The challenge, therefore, 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.

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.

In addition, in the display device, the memory unit may store at least three types of status values, and the graph display unit may display the status values stored in the memory unit in the form of a radar chart graph.

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.

The display device may further include a past display input unit that inputs instruction information to display 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.

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, 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.

The display device may further include a future display input unit that inputs instruction information for displaying 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.

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.

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

The display device may further include an instrument selection input unit that inputs instruction information for selecting a water quality meter from a plurality of water quality meters to be displayed on the display unit, and an individual judgment display input unit that inputs instruction information for displaying the judgment results of the individual judgment display unit.The display unit may be configured so that when instruction information for selecting the water quality meter is input to the instrument selection input unit, the display unit displays a reference screen, 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.

In addition, in the display device, the display unit may further be configured to 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.

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

The display method is a method for displaying the status of a water quality meter executed by at least one computer, and includes storing status values 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.

FIG. 1 is a schematic diagram of a water quality meter control system according to one embodiment. FIG. 2 is a control block diagram of the display device according to the embodiment. FIG. 3 is a diagram showing a reference screen of the display device according to the embodiment. 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. FIG. 5 is a diagram showing a situation in which past state values are displayed on the display device according to the embodiment. 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. FIG. 7 is a diagram showing a situation in which a future state value is displayed on the display device according to the embodiment. 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. FIG. 9 is a diagram showing a situation in which the individual determination result is displayed on the display device according to the embodiment. FIG. 10 is an explanatory diagram of the determination method for the display device according to the embodiment, showing initial reference degradation data. 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. FIG. 12 is a diagram illustrating the determination method for the display device according to the embodiment, showing reference deterioration data after the first calibration after use. 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. FIG. 14 is a diagram showing a display screen of a display device according to another embodiment of the present invention. FIG. 15 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. FIG. 16 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. FIG. 17 is a diagram showing a display screen of a display device according to still another embodiment of the present invention. FIG. 18 is a diagram showing a display screen of a display device according to still another embodiment of the present invention.

One embodiment of a water quality meter management system and 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 shown in the drawing do not necessarily match the actual dimensional ratios, and the dimensional ratios between the drawings do not necessarily match either.

As shown in FIG. 1, the water quality meter management system 10 can be used to manage water quality meters 11 used in a water treatment system, although this is not a limitation. For example, the water quality meter management system 10 may include a 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.

Each device 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, wireless LAN, etc.

The water quality meter 11 is not particularly limited as long as it is an instrument that measures values related to water. Examples of water quality meters 11 include pH meters, oxidation-reduction potential (ORP) meters, fluoride ion meters, ammonia meters, dissolved oxygen (DO) meters, conductivity meters, resistivity meters, activated sludge concentration (MLSS) meters, turbidity meters, color meters, and residual chlorine (residual salt) meters.

Among the status values that indicate the state of a pH meter (e.g., whether the measurement 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 when measuring water quality regardless of calibration include, for example, G electrode film resistance, liquid junction resistance, contamination (e.g., detected by a sensor or predicted from past data), and the number of days since calibration.

Among the status values indicating the state of an ORP meter, status values that can be obtained during calibration include, for example, responsiveness and contamination (e.g., detected by a sensor or visually detected). Furthermore, among the status values of an 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), and the number of days since calibration.

Of the status values indicating the state of a fluoride ion meter, those 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, of the status values of a fluoride ion meter, those 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), and the number of days since calibration.

Of the status values indicating the state of an ammonia meter, 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, of the status values of an ammonia meter, status values that can be obtained while measuring water quality regardless of calibration include, for example, membrane resistance, contamination (e.g., detected by a sensor or predicted from past data), and the number of days since calibration.

Of the status values indicating the state of a diaphragm-type DO meter, status values that can be obtained when calibrating include, for example, the zero point, span point, and responsiveness. Furthermore, of the status values of a diaphragm-type DO meter, status values that can be obtained when measuring water quality regardless of calibration include, for example, the number of days since calibration.

Of 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, and responsiveness. Furthermore, of 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) and the number of days since calibration.

Of the status values indicating the state of the conductivity meter, status values that can be obtained during calibration include, for example, responsiveness and contamination (e.g., detected by a sensor or visually). Furthermore, of the status values of the conductivity meter, status values that can be obtained when measuring water quality regardless of calibration include, for example, the fluctuation range of the sample temperature.

Of the status values indicating the state of a resistivity meter, status values that can be obtained during calibration include, for example, responsiveness and contamination (e.g., detection by a sensor or visual detection). Furthermore, of the status values of a resistivity meter, status values that can be obtained while measuring water quality regardless of calibration include, for example, the fluctuation range of the sample temperature.

Of the status values indicating the state of an MLSS meter, status values that can be obtained when calibrating include, for example, the zero point and span point. Furthermore, of the status values of an MLSS meter, status values that can be obtained when measuring water quality regardless of calibration include, for example, the LED light intensity and the number of days since calibration.

Of the status values indicating the state of a turbidity meter, the zero point, span point, etc. can be obtained when calibrating, for example. Furthermore, of 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.

Of the status values that indicate the state of a colorimeter, those that can be obtained when calibrating include, for example, the zero point, span point, and responsiveness. Furthermore, of the status values of a colorimeter, those that can be obtained when measuring water quality regardless of calibration include, for example, the LED light intensity, cleaning time and number of times (deterioration of wiper rubber), and the number of days since calibration.

Of the status values indicating the state of the residual salt meter, status values that can be obtained when calibrating include, for example, the zero point, span point, and responsiveness. Furthermore, of the status values of the residual salt meter, status values that can be obtained when measuring water quality regardless of calibration include, for example, the number of days since the cleaning beads were replaced and the number of days since calibration.

The display device 1 is a portable terminal device. While 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 100-200 mm, a width of 50-100 mm, and a thickness of 5-20 mm so that it can be operated with one hand. The display device 1 may also be a tablet computer or a notebook computer.

Furthermore, although not limited to, the storage device 12 may be, for example, a server. Furthermore, although not limited to, the control device 13 may be, for example, a variety of computers such as a personal computer. Furthermore, the owners of the water quality meter 11 and each of the devices 1, 12, and 14 may be, for example, the same or, for example, different.

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.

The touch panel 2a is transparent and is placed on top of the surface of the display 3a, so that 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.

Furthermore, although not limited to, the water quality meter 11 and each device 12, 13 may, for example, have an input unit into which various data are input, or may, for example, have an acquisition unit that acquires various data, or may, for example, have an output unit that outputs various data. In the water quality meter management system 10, the input units 2 of each device 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 device 1, 11-13 are collectively referred to as output devices.

As shown in Figure 2, the display device 1 includes a control unit 5 that controls each of the units 2-4, and a communication unit (e.g., an antenna) 6 that transmits and receives information to and from the outside 11-13. The control unit 5 includes an acquisition unit 51 that acquires information, a memory unit 52 that stores the information, a calculation unit 53 that calculates the information, and a judgment unit 54 that makes judgments 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.

The control unit 5 is a computer equipped with a processor such as a CPU or MPU (e.g., the calculation unit 53, the determination unit 54, and each control unit 55-57), memory such as ROM or RAM (e.g., the storage unit 52), various interfaces (e.g., the acquisition unit 51), etc. The processor executes a program stored in the memory, and the various units 53-57 of the control unit 5 are realized by the software and hardware working together.

In addition, in this embodiment, the respective units 53 to 57 of the control unit 5 are realized by a processor in a single computer, the display device 1, i.e., by a single processor executing processing, but this configuration is not limited to this. 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, i.e., by multiple processors executing processing in a distributed manner.

Specifically, at least a portion of the calculation unit 53, determination unit 54, and each of the control units 55-57 of the control unit 5 of the display device 1 according to this embodiment may be provided in a separate device (for example, but not limited to, the control device 13 in FIG. 1). Also, although not limited to, at least a portion of the memory unit 52 of the control unit 5 of the display device 1 according to this embodiment may be provided in a separate device (for example, but not limited to, the memory device 12 and control device 13 in FIG. 1).

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").

The memory 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 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.

The calculation unit 53 calculates future state values (hereinafter also referred to as "future state values") based on the state values 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 values is not particularly limited, as long as it is calculated based on the current state values and past state values.

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 that water quality meter 11, and an individual judgment unit 54b that judges the state of that water quality meter 11 based on the state values of some types of that 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.

Next, the configuration of the input unit 2 and display unit 3 will be explained with reference to Figures 2 and 3. Note that Figure 3 shows, as an example, a screen indicating the status of the pH meter, a reference screen. Also, in Figure 3 (similar to Figures 4 and onwards), dashed lines are lines that are not actually displayed and indicate the areas of each part.

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 among the multiple water quality meters 11. The input unit 2 also includes a previous display input unit 22 that inputs instruction information for displaying the status value for the previous time period relative to the status value displayed on the display unit 3, a subsequent display input unit 23 that inputs instruction information for displaying the status value for the next time period relative to the status 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.

Although not particularly limited, for example, the instrument selection input unit 21, front display input unit 22, rear display input unit 23, and 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 enable instruction information to be input to the front display input unit 22, rear display input unit 23, and individual judgment display unit 34.

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

The display unit 3 includes a selected meter display unit 31 that displays the type of water quality meter 11 currently selected and displayed, and a graph display unit 32 that displays the status values of the water quality meter 11 in a graph. The display unit 3 also includes a comprehensive judgment display unit 33 that displays the judgment results of the comprehensive judgment unit 54a, and an individual judgment display unit 34 that displays the judgment results of the individual judgment units 54b.

Although not particularly limited, as in this embodiment, when the display unit 3 displays the reference screen, the display control unit 56 may cause the selected instrument display unit 31, graph display unit 32, and overall judgment display unit 33 to display information. 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.

The display unit 3 is equipped 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 via the display control unit 56.

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, thereby enabling the status of the water quality meter 11 to be understood.

In Figure 3 (and similarly in Figures 4 and beyond), the radar chart graph of the reference value is shown 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 noted (for example, a status value close to the reference value, or a status value lower than the reference value).

The input unit 2 includes a past display input unit 26 for inputting instruction information that displays past state values, a present display input unit 27 for inputting instruction information that displays current state values, and a future display input unit 28 for inputting instruction information that displays future state values.

The forward display input unit 22 and the backward display input unit 23 also serve 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 serves as the past display input unit 26, and the backward display input unit 23 also serves as the future display input unit 28.

Furthermore, for example, when the graph display unit 32 displays a graph of past state values for the time period immediately preceding the current value (latest value) (see Figures 5(b) and 6(b)), the previous display input unit 22 is also the past display input unit 26, and the next display input unit 23 is also the current display input unit 27. Further, for example, when the graph display unit 32 displays a graph of past state values for the time period two or more preceding the current value (latest value), the previous display input unit 22 and the next display input unit 23 are each also the past display input unit 26.

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 Figures 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. Further, 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.

For example, at least a portion of the input unit 2 of the display device 1 may be provided in another device (such as, but not limited to, the water quality meter 11 or the control device 13 in Figure 1). For example, at least a portion of the display unit 3 of the display device 1 may be provided in another device (such as, but not limited to, the water quality meter 11 or the control device 13 in Figure 1).

Next, with reference to Figure 4, we will explain the operations for selecting the water quality meter 11 to be displayed on the display unit 3 of the display device 1 of this embodiment.

For example, when the display device 1 is turned on, the display unit 3 displays the start screen. 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 period of time, causing the display of the display unit 3 to be turned off, and then information is input to the input unit 2. The display unit 3 may also display the start screen when, for example, a reset instruction is input to button 2b (reset input unit 25).

In this embodiment, although not particularly limited, as shown in FIG. 4(a), when the display unit 3 displays the start screen, the input control unit 55 enables instruction information to be input to the instrument selection input unit 21. 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.

For example, as shown in Figure 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 Figure 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.

Next, the operations for displaying a graph of past state values on the graph display unit 32 of the display device 1 of this embodiment will be explained with reference to Figures 5 and 6.

The first example will be explained with reference to Figure 5.

As shown in Figure 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 from the time immediately preceding the currently displayed current state value, as shown in Figure 5(b). This allows the past state of the water quality meter 11 to be confirmed, thereby enabling the state of the water quality meter 11 to be understood.

In Figure 5(b), the graph of past state values is a graph of state values from one day ago. 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 Figure 5(b), the graph display unit 32 displays a graph of the past state value from one time before the currently displayed past state value (for example, the state value from one day ago) (for example, the state value from two days ago).

The second example is explained with reference to Figure 6.

As shown in Figure 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 Figure 6(b). This allows the current state value to be compared with the past state value, making it easy to understand the state of the water quality meter 11.

In Figure 6(b), the graph of the past state value is a graph of the state value from 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 Figure 6(b), the graph display unit 32 will display a graph of the past state value from one time before the currently displayed past state value (e.g., the state value from one day ago) (e.g., the state value from two days ago), superimposed on the graph of the past state value from one time before and the graph of the current state value.

Note that, for example, a setting screen may be used to set which display method to use, between the method of displaying only one status value as in the first example of Fig. 5 and the method of displaying multiple status 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 (e.g., 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.

Next, with reference to Figures 7 and 8, we will explain the operations 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 of this embodiment.

The first example will be explained with reference to Figure 7.

As shown in Figure 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 Figure 7(b). This allows the state of the water quality meter 11 in the future to be confirmed, and therefore the state of the water quality meter 11 to be predicted.

In Figure 7(b), the graph of the future state value is a graph of the state value one day from now. Furthermore, for example, if further instruction information is input to the future display input unit 23 (future display input unit 28) from the state shown in Figure 7(b), the graph display unit 32 displays a graph of the future state value one time later (e.g., the state value two days from now) from the currently displayed future state value (e.g., the state value one day from now).

The second example is explained with reference to Figure 8.

As shown in Figure 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 for the time one hour after the currently displayed current state value, superimposed on the graph of the current state value, as shown in Figure 8(b). This allows the current state value to be compared with the future state value, making it easy to predict the state of the water quality meter 11.

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

Note that, for example, a setting screen may be used to set which display method to use, between the method of displaying only one status value as in the first example of FIG. 7 and the method of displaying multiple status 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 (e.g., 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.

Furthermore, the combined display of the graph of future state values and the graph of current state values shown in Figure 8 may be used in conjunction with the combined display of the graph of past state values and the graph of current state values shown in Figure 6. In other words, 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.

Next, with reference to Figure 9, we will explain the operations for displaying information on the individual judgment display unit 34 of the display device 1 of this embodiment.

For example, as shown in Figure 9(a), when the display unit 3 displays the reference 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, allowing the user to grasp the overall state of the water quality meter 11. Therefore, for example, the reference screen can provide the minimum necessary important information, making it an effective display method.

On the other hand, when instruction information is input to the individual judgment display input unit 24 as shown in Figure 9(a), the individual judgment display unit 34 displays the judgment result of the individual judgment unit 54b as shown in Figure 9(b). This allows the status of the water quality meter 11 to be displayed based on certain types of status values, so that the detailed status of the water quality meter 11 can also be grasped.

For example, as shown in Figure 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 certain 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 specified state value, as shown in Figure 9(b).

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 displays 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 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.

Here, as an example, we will explain the comprehensive judgment method and individual judgment method related to this embodiment.

The individual judgment unit 54b determines the work day on which each maintenance task should be performed based on certain types of status values. For example, in the case of a pH meter, maintenance tasks include "cleaning," "calibration," and "electrode replacement," and the individual judgment unit 54b determines the work day on which each task should be performed.

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

Then, the overall judgment unit 54a determines the earliest work date and work as the judgment result based on the judgment results of the individual judgment unit 54b. In other words, the overall judgment unit 54a determines the earliest maintenance work and the work date based on the status values of all types. For example, in Figure 9, the work date for "cleaning" (April 22, 2020) is the earliest, so the overall judgment display unit 33 displays this information.

The overall assessment method and individual assessment method are not limited to these methods. For example, the overall 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, but for example, the sum of values obtained by multiplying each current status value by a coefficient may be used as the degree.

In short, the overall judgment unit 54a only needs to judge the state of the water quality meter 11 based on all types of state values, and the individual judgment unit 54b only needs to judge 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.

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

10, the storage unit 52 stores initial reference degradation data D1 indicating the relationship between the predicted value of sensitivity (state value) and time. 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)

In this embodiment, although not limited to this, when the sensitivity falls below a limit value (e.g., 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 called the lifetime t0. Furthermore, although not limited to this, pre-use calibration may be performed before the water quality meter 11 is used.

Then, as shown in Figure 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 the first reference degradation data D2, which indicates the relationship between the predicted sensitivity value y2 after time T1 and time t.

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, and t are variables). Note that α is a coefficient (also called the "first degradation coefficient"). Also, "*" in the expression indicates multiplication (the same applies hereinafter).
y2=α*y1=α*f(t)

The first deterioration coefficient α is set so that the predicted sensitivity value y2 becomes the constant Y1a (actual measured value) when the time t is the constant T1. Also, in Figure 11, the initial reference deterioration data D1 is shown by a dashed line, and the first reference deterioration data D2 is shown by a two-dot chain line.

The individual determination unit 54b also calculates a recommended time T2 for the next calibration (the second time after use). The recommended time T2 can be expressed as 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
It should be noted that ΔT1=(T1-0) and ΔT2=(T2-T1).
The following equation is derived from the above equation:
T2={(1+α)/α}*T1

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 condition 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, which indicates the relationship between the predicted value y2 of sensitivity and time t after the time T1 of the first calibration after use.

Note that, although not limited to, in Figures 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 changed lifetime T0 is slower than the previous lifetime T0.

Then, as shown in Figure 13, the second calibration after use is performed at time T2, as recommended, 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, which indicates the relationship between the predicted sensitivity value y3 after time T2 and time t.

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)

The second deterioration coefficient β is set so that the predicted sensitivity value y3 becomes the constant Y2a (measured value) when the time t is the constant T2. In Figure 13, the primary reference deterioration data D2 is shown by a dashed line, and the secondary reference deterioration data D3 is shown by a two-dot chain line.

The individual judgment unit 54b also 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
It should be noted 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

The individual judgment unit 54b also calculates the lifespan T0 based on the second standard deterioration 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 lifespan T0. As shown in Figure 13, if the lifespan 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.

In addition, although not limited to this, in Figure 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 changed lifetime T0 is shorter than the lifetime T0 before the change.

The individual judgment unit 54b may also perform the above judgments as shown in Figures 10 to 13 for multiple types of state values. Specifically, the individual judgment unit 54b may calculate the recommended time for the next calibration and the lifespan based on each state value. The individual judgment unit 54b may then determine the earliest of the multiple recommended times calculated based on the multiple state values as the recommended time for the next calibration, or may determine the earliest of the multiple lifespans calculated based on the multiple state values as the lifespan.

From the 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.

The water quality meter management system 10 according to this embodiment also includes at least one water quality meter 11 and a display device 1. The display device 1 according to this embodiment also 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.

With this configuration, the display unit 3 displays the status of the water quality meter 11. The graph display unit 32 then displays the status value of the water quality meter 11 in a graph, allowing the status of the water quality meter 11 to be visually confirmed.

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

With this configuration, the graph display unit 32 displays a radar chart graph based on at least three types of status values. This makes it easy to visually check the status of the water quality meter 11.

In addition, in the display device 1 of 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.

With this configuration, a graph based on the status value of the water quality meter 11 is displayed alongside a graph based on the reference value of the status value, allowing the status value of the water quality meter 11 to be compared with the reference value. This allows the status of the water quality meter 11 to be understood.

In addition, the display device 1 of this embodiment further includes a past display input unit 26 that inputs instruction information to display 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.

With this configuration, past status values are displayed in graph form on the graph display unit 32, allowing you to check the past status of the water quality meter 11. This allows you to understand the status of the water quality meter 11.

In addition, in the display device 1 of 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.

With this configuration, the graph display unit 32 displays a graph based on the current status value alongside a graph based on past status values, allowing the current status value to be compared with the past status values. This makes it easy to understand the status of the water quality meter 11.

In addition, the display device 1 of this embodiment further includes a future display input unit 28 that inputs instruction information that displays 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.

With this configuration, future state values are calculated and displayed in graph form on the graph display unit 32, allowing the future state of the water quality meter 11 to be confirmed. This makes it possible to predict the state of the water quality meter 11.

In addition, in the display device 1 of 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.

With this configuration, the graph display unit 32 displays a graph based on the current state value together with a graph based on the future state value, allowing the current state value to be compared with the future state value. This makes it easy to predict the state of the water quality meter 11.

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.

With this configuration, the state of the water quality meter 11 is determined based on all types of status values, and the determination results are displayed on the overall determination display unit 33, allowing the user to grasp the overall state of the water quality meter 11. Furthermore, the state of the water quality meter 11 is determined based on some types of status values, and the determination results are displayed on the individual determination display unit 34, allowing the user to grasp the individual states of the water quality meter 11 as well.

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.

With this configuration, when the reference screen is displayed, the state of the water quality meter 11 determined based on all types of status values is displayed, allowing the user 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, allowing the user to grasp the individual states of the water quality meter 11 as needed.

In addition, in the display device 1 of this embodiment, the display unit 3 is further configured to include an individual judgment display unit 34 that displays the judgment results based on reference deterioration data indicating the relationship between the predicted value of the status value and time, and the actual measured value of the status value and time.

With this configuration, the condition of the water quality meter 11 is determined based on the reference deterioration data, which indicates the relationship between the predicted value of one type of condition value and time, and the actual measured value of that condition value and time, and the determination result is displayed on the individual determination display unit 34. This allows the individual condition of the water quality meter 11 to be understood in comparison with the reference deterioration data.

The display device 1, water quality meter management system 10, and display method are not limited to the configurations of the above-described embodiments, nor are they limited to the effects described above. 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 select one or more of the configurations, methods, etc. related to the various modified examples described below and adopt them in the configurations, methods, etc. related to the above-described embodiments.

(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 the form of a pop-up. 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.

In addition, as a method for the display unit 3 to display the switching screen shown in Figure 14, for example, the switching screen may slide from the bottom and be displayed on the display unit 3. In addition, 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.

For example, as shown in FIG. 14, the display unit 3 may be configured to include a work explanation 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, work explanation display unit 36, and status value explanation display unit 37 may each display information.

(2) Furthermore, 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 such a configuration. For example, as shown in FIG. 15, the graph display unit 32 may be configured to display graphs of multiple state values spaced apart from each other and together.

In such a configuration, the graph display unit 32 may display multiple graphs at different sizes, for example, as shown in Figure 15. For example, as shown in Figure 15, the input unit 2 may include a date and time selection input unit 29 for inputting instruction information for the date and time to be selected, and the graph display unit 32 may display the graph for the date and time input into the date and time selection input unit 29 larger than the other graphs.

(3) Furthermore, 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 dedicated units, i.e., 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 Figures 16 to 18, the front display input unit 22 and the rear display input unit 23 may be configured as a shared unit.

(3-1) The front display input unit 22 and rear display input unit 23 in Figure 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 Figure 16(a), by touching the area and sliding 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 Figure 16(b), the graph display unit 32 displays a graph of the state value for the previous time.

In addition, although not limited to this, as shown in Figure 16(b), the graph display unit 32 may slide and display a graph of the status values for the previous time, linked to finger operation. Also, in the configuration related to Figure 16, although not shown, 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 status values for the next time.

(3-2) The front display input unit 22 and rear display input unit 23 in Figure 17 are arranged in the same area (e.g., the bottom area) on the touch panel 2a. As shown in Figure 17(a), by touching the knob and sliding it 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, as shown in Figure 17(b), if the knob is slid by one scale, the graph display unit 32 displays a graph of the status value for the previous time.

In the configuration of Figure 17, although not shown, when the knob is slid three scale marks to the left, the graph display unit 32 displays a graph of the status values for the time three scale marks earlier. Also, in the configuration of Figure 17, although not shown, by touching the knob and sliding it to the right, 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 displays a graph of the status values for the time three scale marks later than the knob has been moved.

(3-3) The front display input unit 22 and rear display input unit 23 in Figure 18 are arranged in the same area (e.g., the bottom area) on the touch panel 2a. Then, as shown in Figure 18(a), by touching this area, the area of the front display input unit 22, rear display input unit 23, and input information display unit 35 becomes larger. Then, by sliding this area vertically and touching a specified date and time, the input determination unit 54c determines whether instruction information has been input to either the front display input unit 22 or the rear display input unit 23.

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, 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 shown in Figure 18, although not shown, the graph display unit 32 displays a graph of the status values for the input date and time.

(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 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.

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

(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.

(7) Furthermore, 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 such a 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.

(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 state values, and an individual judgment unit 54b that judges the state of the water quality meter 11 based on some types of state values. However, the display device 1 is not limited to this configuration. For example, the judgment unit 54 may be configured not to include at least one of the comprehensive judgment unit 54a and the individual judgment unit 54b.

(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 results of the comprehensive judgment unit 54a, and an individual judgment display unit 34 that displays the judgment results 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 not to include at least one of the comprehensive judgment display unit 33 and the individual judgment display unit 34.

(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 such a configuration. For example, when the display unit 3 displays the reference screen, the overall judgment display unit 33 and the individual judgment display unit 34 may both display information, or neither may display information.

(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 such a configuration. For example, the display device 1 may be configured to be capable of displaying the status of only one water quality meter 11.

(12) Furthermore, 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 such a 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.

(13) Furthermore, 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 such a configuration. For example, the graph display unit 32 may be configured to display a graph based on one or two types of state values.

1...Display device, 2...Input unit, 2a...Touch panel, 2b...Button, 3...Display unit, 3a...Display, 4...Sound output unit, 5...Control unit, 6...Communication unit, 10...Water quality meter management system, 11...Water quality meter, 12...Storage device, 13...Control device, 14...Communication means, 21...Meter selection input unit, 22...Previous display input unit, 23...Subsequent display input unit, 24...Individual judgment display input unit, 25...Reset input unit, 26...Past display input unit, 27...Current display input unit , 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...storage 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 (12)

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