Sensor evaluation device, sensor evaluation system, method for evaluating sensor, and sensor evaluation program

Abstract

To provide a water quality measuring unit which is cleaned, is corrected, or is exchanged with ease and at a right moment.SOLUTION: A sensor evaluation device includes an evaluation unit for evaluating a second water quality measurement unit on the basis of second state information showing the state of a target ship, first state information, a first water quality measured value, and a second water quality measured value of the second water quality measurement unit of the target ship. The first state information is information showing the state of at least one reference ship. The first water quality measured value is the water quality measured value of an optical first water quality measured unit of the reference ship and is the water quality measured value in a case where the reference ship is in the state shown by the first state information.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a sensor evaluation device, a sensor evaluation system, a sensor evaluation method, and a sensor evaluation program. [Background technology]

[0002] Patent Document 1 states that "What the present invention provides is a method for monitoring the function of a sensor, and a sensor equipped with an integrated system for monitoring function" (paragraph 0005). Patent Document 2 states, "The present disclosure relates to a monitoring system for an electrochemical sensor" (Abstract). [Prior art document] [Patent documents] [Patent Document 1] Patent No. 5096162 [Patent Document 2] U.S. Patent Application Publication No. 2021 / 0396710 Summary of the Invention [Problem to be solved by the invention]

[0003] It is preferable that the water quality measuring device be easily and timely cleaned, calibrated or replaced. [Means for solving the problem]

[0004] In a first aspect of the present invention, a sensor evaluation device is provided. The sensor evaluation device includes an evaluation unit that evaluates a second water quality measuring device based on second status information indicating the status of a target ship, the first status information, a first water quality measurement value, and a second water quality measurement value of a second optical water quality measuring device carried by the target ship. The first status information is information indicating the status of one or more reference ships. The first water quality measurement value is a water quality measurement value of a first optical water quality measuring device carried by the reference ship, and is a water quality measurement value when the reference ship is in a state indicated in the first status information.

[0005] The reference ship may have a reference exhaust gas treatment device into which a first liquid and a first exhaust gas are introduced and which discharges a first effluent obtained by treating the first exhaust gas with the first liquid. The target ship may have a target exhaust gas treatment device into which a second liquid and a second exhaust gas are introduced and which discharges a second effluent obtained by treating the second exhaust gas with the second liquid. The first water quality measuring device may have a first turbidity meter that measures a first turbidity of the first liquid or the first effluent. The second water quality measuring device may have a second turbidity meter that measures a second turbidity of the second liquid or the second effluent. The evaluation unit may evaluate the second water quality measuring device based on the first turbidity and the second turbidity.

[0006] In any of the above sensor evaluation devices, the first water quality measuring device may have a first transmitted light receiving unit that receives first transmitted light emitted by the first light source and transmitted through the first liquid or the first effluent, and the second water quality measuring device may have a third transmitted light receiving unit that receives third transmitted light emitted by the third light source and transmitted through the second liquid or the second effluent. The evaluation unit may evaluate the second water quality measuring device based on the first turbidity, the second turbidity, the intensity of the first transmitted light, and the intensity of the third transmitted light.

[0007] In any of the above sensor evaluation devices, the evaluation unit may evaluate that the second water quality measuring device is contaminated, or that the second liquid or the second wastewater is contaminated, if the transmitted light intensity ratio of the intensity of the third transmitted light to the intensity of the first transmitted light is smaller than a predetermined transmitted light intensity threshold.

[0008] In any of the above sensor evaluation devices, the target ship may navigate a first sea area where a regulatory value for the concentration of particulate matter contained in the second exhaust gas is a first concentration, and a second sea area where a regulatory value for the concentration is a second concentration different from the first concentration. If the transmitted light intensity ratio is smaller than the transmitted light intensity threshold while the target ship is navigating the first sea area, and if the transmitted light intensity ratio is smaller than the transmitted light intensity threshold while the target ship is navigating the second sea area, the evaluation unit may evaluate that the second water quality measuring device is contaminated.

[0009] In any of the above sensor evaluation devices, the target ship may navigate a first sea area in which a regulatory value for the concentration of particulate matter contained in the second exhaust gas is a first concentration, and a second sea area in which a regulatory value for the concentration is a second concentration different from the first concentration. If the transmitted light intensity ratio is smaller than the transmitted light intensity threshold when the target ship is navigating the first sea area and the transmitted light intensity ratio is equal to or greater than the transmitted light intensity threshold when the target ship is navigating the second sea area, or if the transmitted light intensity ratio is smaller than the transmitted light intensity threshold when the target ship is navigating the second sea area and the transmitted light intensity ratio is equal to or greater than the transmitted light intensity threshold when the target ship is navigating the first sea area, the evaluation unit may evaluate that the second liquid or the second effluent is contaminated.

[0010] In any of the above sensor evaluation devices, the first water quality measuring instrument may further have a first fluorometer that measures a first fluorescence when the first liquid or the first effluent is irradiated with light emitted by the second light source, and the second water quality measuring instrument may further have a second fluorometer that measures a second fluorescence when the second liquid or the second effluent is irradiated with light emitted by the fourth light source. The evaluation unit may evaluate the second water quality measuring instrument based on the first turbidity, the second turbidity, the intensity of the first fluorescence, and the intensity of the second fluorescence.

[0011] In any of the above sensor evaluation devices, the evaluation unit may evaluate that the second liquid or the second waste liquid is contaminated when the turbidity ratio of the second turbidity to the first turbidity is equal to or less than a predetermined turbidity threshold and the fluorescence intensity ratio of the intensity of the second fluorescence to the intensity of the first fluorescence is smaller than a predetermined fluorescence intensity threshold.

[0012] In any of the above sensor evaluation devices, the evaluation unit may evaluate that the second turbidity meter is contaminated if the turbidity ratio of the second turbidity to the first turbidity is equal to or less than a predetermined turbidity threshold and the fluorescence intensity ratio of the intensity of the second fluorescence to the intensity of the first fluorescence is equal to or greater than a predetermined fluorescence intensity threshold.

[0013] In any of the above sensor evaluation devices, the evaluation unit may evaluate that the second fluorometer is contaminated if the turbidity ratio of the second turbidity to the first turbidity is greater than a predetermined turbidity threshold and the fluorescence intensity ratio of the intensity of the second fluorescence to the intensity of the first fluorescence is smaller than a predetermined fluorescence intensity threshold.

[0014] In any of the above sensor evaluation devices, the second water quality measuring instrument may have a third transmitted light receiving unit that receives third transmitted light obtained when light emitted by the third light source is transmitted through the second liquid or the second effluent, and the second fluorometer may further have a fourth transmitted light receiving unit that receives fourth transmitted light obtained when light emitted by the fourth light source is transmitted through the second liquid or the second effluent. The evaluation unit may evaluate the second fluorometer based on the intensity of the third transmitted light and the intensity of the fourth transmitted light.

[0015] Any of the sensor evaluation devices described above may further include a calculation unit that calculates the calibration timing or replacement timing of the second fluorometer based on the evaluation result of the second fluorometer by the evaluation unit.

[0016] In any of the sensor evaluation devices described above, the calculation section may calculate the calibration time or the replacement time based on the change over time of the second fluorescence.

[0017] In any of the above sensor evaluation devices, the calculation unit may calculate the calibration time or replacement time further based on the planned route of the target ship.

[0018] In any of the above sensor evaluation devices, the first status information may include information on the nautical position of the reference ship, and the second status information may include information on the nautical position of the target ship. The evaluation unit may evaluate the second water quality measuring device based on the nautical position of the target ship, the nautical position of the reference ship, and the first water quality measurement value when the reference ship is at the nautical position.

[0019] In any of the above sensor evaluation devices, the second status information may include information on the navigation position of the target ship. The evaluation unit may select a status of the target ship for evaluating the second water quality measuring device based on the information on the navigation position of the target ship, and evaluate the second water quality measuring device when the target ship is in the selected status.

[0020] In any of the sensor evaluation devices described above, the calculation section may determine a position for replacing the second fluorometer based on the calculated replacement time and information on the voyage position of the target ship.

[0021] Any of the sensor evaluation devices described above may further include a calibration unit that calibrates the second fluorometer based on a result of evaluation of the second fluorometer by the evaluation unit.

[0022] Any of the sensor evaluation devices described above may further include a storage unit that stores the first status information and the first water quality measurement value.

[0023] In any of the above sensor evaluation devices, one of the second water quality measuring devices may measure the water quality of the second liquid, and the other of the second water quality measuring devices may measure the water quality of the second wastewater. The evaluation unit may evaluate the other of the second water quality measuring devices based on the evaluation result of the one of the second water quality measuring devices.

[0024] Any of the above sensor evaluation devices may further include an evaluation learning unit that generates an evaluation inference model that outputs evaluation inference data indicating an evaluation result for the second water quality measurement value when the second water quality measurement value of the second water quality measuring device is input by machine learning the relationship between the first water quality measurement value and the evaluation result of the second water quality measuring device.

[0025] In a second aspect of the present invention, there is provided a sensor evaluation system. The sensor evaluation system may include any one of the sensor evaluation devices described above, and a second transmission unit included in a target ship, the second transmission unit transmitting a second water quality measurement value of the second water quality measuring device to the sensor evaluation device. The sensor evaluation device may include a first transmission unit transmitting an evaluation result of the second water quality measuring device by the evaluation unit to the target ship.

[0026] A sensor evaluation system may include any one of the sensor evaluation devices described above, a position information acquisition unit included in a target ship that acquires information on the nautical position of the target ship, and a second transmission unit included in the target ship that transmits a second water quality measurement value of the second water quality measuring device and information on the nautical position of the target ship to the sensor evaluation device. The sensor evaluation device may have a first transmission unit that transmits an evaluation result of the second water quality measuring device by the evaluation unit to the target ship.

[0027] Any of the above sensor evaluation systems may further include a calibration unit provided in the target ship, the calibration unit calibrating the second fluorescent meter based on the evaluation result of the second fluorescent meter by the evaluation unit.

[0028] Any of the above sensor evaluation systems may further include a memory unit included in the target ship, the memory unit storing the first status information and the first water quality measurement value.

[0029] In a third aspect of the present invention, a sensor evaluation method is provided. The sensor evaluation method includes an evaluation step in which an evaluation unit evaluates a second water quality measuring device based on second status information indicating a status of a target ship, the first status information, a first water quality measurement value, and a second water quality measurement value of a second optical water quality measuring device carried by the target ship. The first status information is information indicating a status of one or more reference ships. The first water quality measurement value is a water quality measurement value of a first optical water quality measuring device carried by the reference ship, and is a water quality measurement value when the reference ship is in a status indicated in the first status information.

[0030] In a fourth aspect of the present invention, there is provided a sensor evaluation program, which causes a computer to function as any one of the sensor evaluation devices or sensor evaluation systems described above.

[0031] The above summary of the invention does not list all of the features of the present invention. Also, subcombinations of these features may also be inventions. [Brief description of the drawings]

[0032] [Figure 1] 2 is a diagram showing an example of a relationship between a target ship 200, a sensor evaluation device 100, and a sensor evaluation system 400. FIG. [Diagram 2] 2 is a diagram showing an example of a relationship between a reference ship 300 and a sensor evaluation device 100. FIG. [Diagram 3] 1 is a diagram showing an example of a relationship between one or more reference ships 300 and a sensor evaluation device 100. FIG. [Figure 4] FIG. 1 is a block diagram showing an example of a sensor evaluation device 100 according to an embodiment of the present invention. [Diagram 5] 10 is a diagram showing an example of a manner in which first status information Is1 and a first water quality measurement value Q1 are stored by the storage unit 10. FIG. [Figure 6] 4 is a diagram showing an example of details of a second water quality measuring device 80. FIG. [Figure 7] FIG. 4 is a diagram showing an example of the details of a second turbidity meter 81. [Figure 8] 13 is a diagram showing an example of the details of a second fluorometer 83. FIG. [Figure 9] FIG. 2 is a diagram showing an example of details of a first water quality measuring device 180. [Figure 10] FIG. 2 is a diagram showing an example of details of a first turbidity meter 181. [Figure 11] FIG. 13 shows an example of the details of a first fluorometer 183. [Figure 12] 13 is a diagram showing an example of the relationship between the second turbidity Tu2 of the second liquid 74 measured by the second turbidimeter 81 and the elapsed time t. FIG. [Figure 13] FIG. 13 is a diagram showing an example of pre-processed data for the measurement value of the second turbidity Tu2 selected as the evaluation target of the second water quality measuring instrument 80 in FIG. 12. [Figure 14] FIG. 14 is a diagram showing an example of the relationship between the preprocessed data in FIG. 13 and the second turbidity Tu2. [Figure 15] 2 is a diagram showing an example of a route of a target ship 200. FIG. [Figure 16] 13 is a graph showing an example of the relationship between the intensity of the second fluorescence Lf2 of the second liquid 74 measured by the second fluorometer 83 and the elapsed time t. FIG. [Figure 17] 13 is a graph showing another example of the relationship between the intensity of the second fluorescence Lf2 of the second liquid 74 measured by the second fluorometer 83 and the elapsed time t. FIG. [Figure 18] 13 is a diagram showing another example of the route of the target ship 200. FIG. [Figure 19] 10 is a diagram showing another example of the manner in which the first status information Is1 and the first water quality measurement value Q1 are stored by the storage unit 10 (see FIG. 4). FIG. [Figure 20] 2 is a diagram showing an example of a relationship between a target ship 210, a sensor evaluation device 100, and a sensor evaluation system 400. FIG. [Figure 21] 13 is a diagram showing another example of the relationship between the target ship 200, the sensor evaluation device 100, and the sensor evaluation system 400. FIG. [Figure 22] FIG. 1 is a diagram illustrating an example of an evaluation inference model 110. [Figure 23] FIG. 2 is a block diagram showing another example of the sensor evaluation device 100 according to an embodiment of the present invention. [Figure 24] 1 is a flowchart illustrating an example of a sensor evaluation method according to an embodiment of the present invention. [Diagram 25] 1 is a flowchart illustrating an example of a sensor evaluation method according to an embodiment of the present invention. [Figure 26] 1 is a flowchart illustrating an example of a sensor evaluation method according to an embodiment of the present invention. [Figure 27] FIG. 11 is a diagram illustrating an example of details of trend determination in trend determination step S120. [Figure 28] FIG. 13 is a diagram illustrating another example of the details of the trend determination in the trend determination step S120. [Figure 29] FIG. 2 illustrates an example of a computer 2200 in which the sensor evaluation device 100 or the sensor evaluation system 400 according to an embodiment of the present invention may be implemented in whole or in part. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0034] FIG. 1 is a diagram showing an example of the relationship between a target ship 200, a sensor evaluation device 100, and a sensor evaluation system 400. In FIG. 1, the range of the target ship 200 is indicated by a dashed line, and the range of the sensor evaluation system 400 is indicated by a rough dashed line. The target ship 200 is a ship having a second water quality measuring instrument 80 that is the evaluation target of the sensor evaluation device 100. Regardless of the type of ship, all ships can be the target ship 200. The type of ship refers to whether the ship is a cargo ship or a passenger ship, the size of the ship, the displacement of the engine of the ship, etc.

[0035] The target ship 200 has a target exhaust gas treatment device 70. The target exhaust gas treatment device 70 is, for example, a ship scrubber. A second liquid 74 and a second exhaust gas 62 are introduced into the target exhaust gas treatment device 70. The second water quality measuring device 80 is of an optical type. The optical type refers to a method of using at least one of transmitted light, scattered light, reflected light, and fluorescence when light is irradiated onto the measurement target. The second water quality measuring device 80 may have at least one of a second turbidimeter 81 and a second fluorometer 83. The second fluorometer 83 may be a PAH (Polycyclic Aromatic Hydrocarbons) sensor.

[0036] The target vessel 200 may have a power unit 60 and a pump 72. The power unit 60 is, for example, an engine. The power unit 60 discharges a second exhaust gas 62. The second exhaust gas 62 may contain harmful substances such as sulfur oxides and nitrogen oxides. The pump 72 introduces a second liquid 74 into the target exhaust gas treatment device 70. The second liquid 74 may be seawater.

[0037] The target exhaust gas treatment device 70 treats the second exhaust gas 62 with the second liquid 74. Treating the second exhaust gas 62 refers to removing the above-mentioned harmful substances contained in the second exhaust gas 62. The target exhaust gas treatment device 70 discharges a second effluent 76 obtained by treating the second exhaust gas 62 with the second liquid 74. The second effluent 76 may contain harmful substances such as sulfur oxides and nitrogen oxides. The second effluent 76 may be discharged outside the target exhaust gas treatment device 70. The target exhaust gas treatment device 70 discharges an exhaust gas 64 obtained by treating the second exhaust gas 62 with the second liquid 74.

[0038] The target ship 200 may have a control unit 50, a data collection unit 52, a second transmission unit 54, a second reception unit 56, and a position information acquisition unit 58. The control unit 50 controls the power plant 60, the data collection unit 52, the second transmission unit 54, the second reception unit 56, and the position information acquisition unit 58. The control unit 50 is, for example, a CPU (Central Processing Unit).

[0039] The target ship 200 may have multiple second water quality measuring devices 80. In this example, the target ship 200 has two second water quality measuring devices 80 (second water quality measuring device 80-1 and second water quality measuring device 80-2). In this example, one second water quality measuring device 80 (second water quality measuring device 80-1) measures the water quality of the second liquid 74, and the other second water quality measuring device 80 (second water quality measuring device 80-2) measures the water quality of the second discharged liquid 76. The target ship 200 may have a gas sensor 82. The gas sensor 82 measures the concentration of harmful substances in the exhaust gas 64.

[0040] The target ship 200 may be sailing on the ocean. The sensor evaluation device 100 may be located on land. The sensor evaluation device 100 may be installed on the target ship 200.

[0041] The position information acquisition unit 58 acquires information on the nautical position of the target ship 200. The position information acquisition unit 58 is, for example, a Global Positioning System (GPS). The information on the nautical position of the target ship 200 acquired by the position information acquisition unit 58 is referred to as position information Ip.

[0042] The data collection unit 52 collects the water quality measurement values ​​of the second water quality measuring instrument 80, the harmful substance concentration measurement values ​​of the gas sensor 82, the output of the power plant 60, and position information Ip of the target ship 200. The data collected by the data collection unit 52 is referred to as data Da1.

[0043] The second transmission unit 54 transmits the data Da1 to the sensor evaluation device 100. The second transmission unit 54 of the target ship 200 at sea may transmit the data Da1 to the sensor evaluation device 100 located on land. The second transmission unit 54 may transmit the data Da1 via an Internet line. The second receiving unit 56 receives data on the evaluation result of the second water quality measuring instrument 80 by the sensor evaluation device 100. This data is referred to as data Da2.

[0044] The second receiving unit 56 may receive the data Da2 transmitted by a first transmitting unit 20 (described later) of the sensor evaluation device 100. The second receiving unit 56 may receive the data Da2 via an Internet line.

[0045] The sensor evaluation system 400 may include the sensor evaluation device 100 and a second transmitting unit 54. The sensor evaluation system 400 may further include a location information acquiring unit 58. The sensor evaluation system 400 may further include a control unit 50, a data collecting unit 52, and a second receiving unit 56.

[0046] Fig. 2 is a diagram showing an example of the relationship between the reference ship 300 and the sensor evaluation device 100. In Fig. 2, the scope of the reference ship 300 is indicated by a dashed line. The reference ship 300 is a ship that can provide reference data for evaluating the second water quality measuring instrument 80 (see Fig. 1), which is the evaluation target of the sensor evaluation device 100. As with the target ship 200, any ship can be the reference ship 300, regardless of the type of ship.

[0047] The reference ship 300 has a reference exhaust gas treatment device 170. The reference exhaust gas treatment device 170 is, for example, a marine scrubber. A first liquid 174 and a first exhaust gas 162 are introduced into the reference exhaust gas treatment device 170.

[0048] The reference vessel 300 may have a power unit 160 and a pump 172. The power unit 160 may be, for example, an engine. The power unit 160 discharges a first exhaust gas 162. The first exhaust gas 162 may contain harmful substances such as sulfur oxides and nitrogen oxides. The pump 172 introduces a first liquid 174 into the reference exhaust gas treatment device 170. The first liquid 174 may be seawater.

[0049] The reference exhaust gas treatment device 170 treats the first exhaust gas 162 with a first liquid 174. The reference exhaust gas treatment device 170 discharges a first effluent 176 obtained by treating the first exhaust gas 162 with the first liquid 174. The first effluent 176 may be discharged outside the reference exhaust gas treatment device 170. The reference exhaust gas treatment device 170 discharges an exhaust gas 164 obtained by treating the first exhaust gas 162 with the first liquid 174.

[0050] The reference vessel 300 may have a control unit 150, a data collection unit 152, a second transmission unit 154, a second receiving unit 156, and a position information acquisition unit 158. The functions of the control unit 150, the data collection unit 152, the second transmission unit 154, the second receiving unit 156, and the position information acquisition unit 158 ​​may be the same as those of the control unit 50, the data collection unit 52, the second transmission unit 54, the second receiving unit 56, and the position information acquisition unit 58, respectively.

[0051] The reference vessel 300 has a first optical water quality measuring instrument 180. The first water quality measuring instrument 180 may have at least one of a first turbidity meter 181 (described below) and a first fluorometer 183 (described below). The first fluorometer 183 may be a PAH sensor.

[0052] The reference vessel 300 may have multiple first water quality measuring devices 180. In this example, the reference vessel 300 has two first water quality measuring devices 180 (first water quality measuring device 180-1 and first water quality measuring device 180-2). In this example, one first water quality measuring device 180-1 measures the water quality of the first liquid 174, and the other first water quality measuring device 180-2 measures the water quality of the first discharged liquid 176. The reference vessel 300 may have a gas sensor 182. The gas sensor 182 measures the concentration of harmful substances in the exhaust gas 164.

[0053] The position information acquisition unit 158 ​​acquires information on the nautical position of the reference ship 300. The position information acquisition unit 158 ​​is, for example, a GPS. The information on the nautical position of the reference ship 300 is referred to as position information Ip'.

[0054] The data collection unit 152 collects the water quality measurement values ​​of the first water quality measuring instrument 180, the harmful substance concentration measurement values ​​of the gas sensor 182, the output of the power unit 160, and position information Ip' of the reference vessel 300. The data collected by the data collection unit 152 is referred to as data Da1'.

[0055] The second transmitting unit 154 transmits the data Da1' to the sensor evaluation device 100. The second receiving unit 156 receives data on the evaluation result of the first water quality measuring device 180 by the sensor evaluation device 100. This data is referred to as data Da2'.

[0056] 3 is a diagram showing an example of a relationship between one or more reference ships 300 and the sensor evaluation device 100. In this example, each of the n reference ships 300 transmits data Da1′ to the sensor evaluation device 100 and receives data Da2′ from the sensor evaluation device 100.

[0057] 4 is a block diagram showing an example of a sensor evaluation device 100 according to an embodiment of the present invention. The sensor evaluation device 100 includes an evaluation unit 14. The sensor evaluation device 100 may include a storage unit 10, a generation unit 12, a control unit 16, a calculation unit 18, and a calibration unit 11.

[0058] The sensor evaluation device 100 may include a first transmitting unit 20 and a first receiving unit 22. The first receiving unit 22 receives the data Da1 transmitted by the second transmitting unit 54. The first receiving unit 22 receives the data Da1' transmitted by the second transmitting unit 154. The first transmitting unit 20 transmits the data Da2 to the second receiving unit 56. The first transmitting unit 20 may transmit the data Da2' to the second receiving unit 156.

[0059] The memory unit 10 stores first status information indicating the status of one or more reference ships 300 (see FIG. 2) and a first water quality measurement value of the first water quality measuring instrument 180. The first status information is referred to as first status information Is1. The first water quality measurement value is referred to as first water quality measurement value Q1.

[0060] The first status information Is1 may include a value of the output Pw of the power unit 160 (see FIG. 2). The first status information Is1 may include information on the flow rate of the first liquid 174 or information on the flow rate of the first discharge liquid 176. The first status information Is1 may include the navigation position of the reference ship 300 (see FIG. 2), the output of the power unit 160 (see FIG. 2) while sailing at the navigation position, and the type of the reference ship 300. The navigation position of the reference ship 300 refers to the latitude and longitude at which the reference ship 300 is sailing. The type of the reference ship 300 refers to information such as whether the reference ship 300 is a cargo ship or a passenger line, as described above.

[0061] The first water quality measurement value Q1 is a measurement value of water quality when the reference ship 300 (see FIG. 2) is in a state indicated in the first status information Is1. The measurement value of water quality when the reference ship 300 is in a state indicated in the first status information Is1 refers to a water quality measurement value of the first liquid 174 (see FIG. 2) or the first discharged liquid 176 (see FIG. 2) measured by the first water quality measuring device 180 (see FIG. 2) while the reference ship 300 is sailing at a certain navigation position with a certain output of the power unit 160 (see FIG. 2). The memory unit 10 may store the first water quality measurement value Q1 for each sea area, each season, and each weather condition.

[0062] 5 is a diagram showing an example of the manner in which the first status information Is1 and the first water quality measurement value Q1 are stored by the memory unit 10. The memory unit 10 may store the navigation position of the reference ship 300 and the first water quality measurement value Q1 when the reference ship 300 is at that navigation position. In this example, the memory unit 10 stores n pieces of first status information Is1 indicating the respective states of the n reference ships 300 (see FIG. 3) and the first water quality measurement value Q1 of each of the first water quality measuring instruments 180 of the n reference ships 300 in association with each other.

[0063] The first water quality measurement value Q1 may be at least one of the first turbidity, the intensity of the first transmitted light Lt1 (described later), and the intensity of the first fluorescent light LF1 (described later). The first turbidity is referred to as the first turbidity Tu1. In this example, the intensities of the first turbidity Tu1 and the first fluorescent light Lf1 are measured by the first turbidity meter 181 and the first fluorescent light Lf1, respectively. The first turbidity Tu1 is the turbidity of the first liquid 174 or the first drainage liquid 176. The intensity of the first fluorescent light Lf1 is the intensity of the first fluorescent light Lf1 when the light emitted by the second light source 135 (described later) is irradiated to the first liquid 174 or the first drainage liquid 176. The intensity of the first transmitted light Lt1 is the intensity of the first transmitted light Lt1 received by the first transmitted light receiving unit 131, as described later.

[0064] The generation unit 12 (see FIG. 4) may generate a water quality standard value based on second status information indicating the status of the target ship 200 (see FIG. 1), the first status information Is1, and the first water quality measurement value Q1. The second status information is set as second status information Is2. The water quality standard value is set as water quality standard value Qs. The water quality standard value Qs is the standard value of water quality when the target ship 200 is in the status indicated in the second status information Is2.

[0065] When the first water quality measurement value Q1 is the first turbidity Tu1, the water quality reference value Qs is a reference value of the turbidity of the first liquid 174 or the first drainage liquid 176. The reference value of the turbidity may be the average value or the median value of the multiple first turbidities Tu1 (Tu1_1 to Tu1_n shown in FIG. 5). When the first water quality measurement value Q1 is the intensity of the first fluorescence Lf1, the water quality reference value Qs is a reference value of the fluorescence intensity of the first liquid 174 or the first drainage liquid 176. The reference value of the fluorescence intensity may be the average value or the median value of the multiple intensities of the first fluorescence Lf1 (Lf1_1 to Lf1_n shown in FIG. 5). When the first water quality measurement value Q1 is the intensity of the first transmitted light Lt1, the water quality reference value Qs is a reference value of the intensity of the first transmitted light Lt1 transmitted through the first liquid 174 or the first drainage liquid 176. The reference value of the intensity of the first transmitted light Lt1 may be the average value or the median value of the intensities of a plurality of first transmitted lights Lt1 (Lt1_1 to Lt1_n shown in FIG. 5).

[0066] The second status information Is2 may include position information Ip. The position information Ip may be the nautical position of the target ship 200 (see FIG. 1). The second status information Is2 may include the position information Ip, the output of the power unit 60 (see FIG. 1) when the target ship 200 is sailing at the position of the position information Ip, and the type of the target ship 200. The position information acquisition unit 58 acquires the position information Ip. The position information acquisition unit 58 may acquire the nautical position of the target ship 200 in real time while the target ship 200 is sailing.

[0067] The second status information Is2 may include the output Pw of the power unit 60 of the target ship 200 (see FIG. 1). The second status information Is2 may include information on the flow rate of the second liquid 74 or information on the flow rate of the second discharge liquid 76. The second status information Is2 may include the navigation position of the target ship 200 (see FIG. 1), the output of the power unit 60 (see FIG. 1) while sailing at the navigation position, and the type of the target ship 200. The data collection unit 52 (see FIG. 1) may acquire in real time the navigation position of the target ship 200 acquired by the position information acquisition unit 58, the output Pw of the power unit 60 while sailing at the navigation position, the flow rate of the second liquid 74, and the flow rate of the second discharge liquid 76.

[0068] 6 is a diagram showing an example of details of the second water quality measuring instrument 80. In this example, the second water quality measuring instrument 80 has a second turbidity meter 81 and a second fluorometer 83. The second water quality measuring instrument 80 may have a valve 84, a valve 85, a three-way valve 86, a strainer 87, a chamber 88, a defoaming layer 89, a pump 96, a pressure gauge 97, a pH meter 98, and a thermometer 99.

[0069] The strainer 87 removes solid foreign matter contained in the second liquid 74 or the second drainage liquid 76. The pump 96 introduces the second liquid 74 or the second drainage liquid 76 from which the foreign matter has been removed into the defoaming layer 89. The pressure meter 97 measures the pressure of the second liquid 74 or the second drainage liquid 76 introduced into the defoaming layer 89. The defoaming layer 89 removes air bubbles contained in the second liquid 74 or the second drainage liquid 76. The chamber 88 stores the second liquid 74 or the second drainage liquid 76 from which the air bubbles have been removed. The pH meter 98 measures the pH of the second liquid 74 or the second drainage liquid 76 stored in the chamber 88. The thermometer 99 measures the temperature of the second liquid 74 or the second drainage liquid 76 stored in the chamber 88. The three-way valve 86 controls whether the second liquid 74 or the second drainage liquid 76 stored in the chamber 88 flows to the second fluorometer 83.

[0070] After passing through the valve 85, the second liquid 74 flowing out of the second water quality measuring device 80 may be introduced into the target exhaust gas treatment device 70. The second effluent 76 discharged by the target exhaust gas treatment device 70 may be introduced into a strainer 87 after passing through a valve 84.

[0071] 7 is a diagram showing an example of details of the second turbidity meter 81. The second turbidity meter 81 measures the second turbidity of the second liquid 74 or the second drainage liquid 76. The second turbidity is referred to as a second turbidity Tu2.

[0072] In this example, the second turbidimeter 81 has a third light source 30, a third transmitted light receiving unit 31, a second scattered light receiving unit 32, a flow path 33, and a lens 34. The second liquid 74 or the second drainage liquid 76 flows through the flow path 33. FIG. 7 is a cross-sectional view of the flow path 33. The third light source 30 may be a light source that emits light with a near-infrared wavelength. The third light source 30 is, for example, an LED. The light emitted by the third light source 30 is light L3. The wavelength of the light L3 may be 800 nm or more and 1000 nm or less, or may be 830 nm or more and 890 nm or less. In this example, the wavelength of the light L3 is 860 nm. The third light source 30 may emit the light L3 in a direction that intersects with the direction in which the second liquid 74 or the second drainage liquid 76 flows.

[0073] The third transmitted light receiving unit 31 receives the third transmitted light emitted by the third light source 30 and transmitted through the second liquid 74 or the second drainage liquid 76. The third transmitted light is referred to as the third transmitted light Lt3. The third transmitted light receiving unit 31 is, for example, a photodiode. The second scattered light receiving unit 32 receives the second scattered light emitted by the third light source 30 and scattered by the second liquid 74 or the second drainage liquid 76. The second scattered light is referred to as the second scattered light Ls2. The second scattered light receiving unit 32 is, for example, a photodiode. The second scattered light receiving unit 32 may receive the second scattered light Ls2 collected by the lens 34. In this example, the second turbidity Tu2 is the ratio (Ls2 / Lt3) of the intensity of the second scattered light Ls2 to the third transmitted light Lt3.

[0074] The second turbidity meter 81 may measure the second turbidity Tu2 by a so-called surface scattered light method. In the case of the surface scattered light method, the second turbidity meter 81 measures the second turbidity Tu2 based on the second scattered light Ls2 generated when the second liquid 74 or the second drainage liquid 76 is irradiated with the light L3. In the case of the surface scattered light method, the second turbidity meter 81 can measure the second turbidity Tu2 without based on the third transmitted light Lt3.

[0075] FIG. 8 is a diagram showing an example of the details of the second fluorometer 83. In this example, the second fluorometer 83 has a fourth light source 35, a fourth transmitted light receiving unit 36, a second fluorescent light receiving unit 37, a flow path 38, and a lens 39. The second liquid 74 or the second drainage liquid 76 flows through the flow path 38. FIG. 8 is a cross-sectional view of the flow path 38. The fourth light source 35 may be a light source that emits light with a near-ultraviolet wavelength. The fourth light source 35 is, for example, an LED. The light emitted by the fourth light source 35 is light L4. The wavelength of the light L4 may be 200 nm or more and 380 nm or less, 220 nm or more and 300 nm or less, or 244 nm or more and 264 nm or less. In this example, the wavelength of the light L4 is 254 nm. The fourth light source 35 may emit the light L4 in a direction intersecting the direction in which the second liquid 74 or the second drainage liquid 76 flows.

[0076] The fourth transmitted light receiving unit 36 ​​receives the fourth transmitted light emitted by the fourth light source 35 and transmitted through the second liquid 74 or the second drainage liquid 76. The fourth transmitted light is referred to as the fourth transmitted light Lt4. The fourth transmitted light receiving unit 36 ​​is, for example, a photodiode. The second fluorescent light receiving unit 37 receives the second fluorescent light generated when the second liquid 74 or the second drainage liquid 76 is irradiated with the light L4 emitted by the fourth light source 35. The second fluorescent light is referred to as the second fluorescent light Lf2. The second fluorometer 83 measures the second fluorescent light Lf2 of the second liquid 74 or the second drainage liquid 76. The second fluorescent light receiving unit 37 is, for example, a photodiode. The second fluorescent light receiving unit 37 may receive the second fluorescent light Lf2 collected by the lens 39.

[0077] 9 is a diagram showing an example of details of the first water quality measuring instrument 180. In this example, the first water quality measuring instrument 180 has a first turbidity meter 181 and a first fluorescence meter 183. The first water quality measuring instrument 180 may have a valve 184, a valve 185, a three-way valve 186, a strainer 187, a chamber 188, a defoaming layer 189, a pump 196, a pressure gauge 197, a pH meter 198, and a thermometer 199. The functions of the valve 184, the valve 185, the three-way valve 186, the strainer 187, the chamber 188, the pump 196, the pressure gauge 197, the pH meter 198, and the thermometer 199 may be similar to those of the valve 84, the valve 85, the three-way valve 86, the strainer 87, the chamber 88, the pump 96, the pressure gauge 97, the pH meter 98, and the thermometer 99 of the second water quality measuring instrument 80, respectively.

[0078] FIG. 10 is a diagram showing an example of the details of the first turbidity meter 181. The first turbidity meter 181 measures the first turbidity Tu of the first liquid 174 or the first drainage liquid 176. In this example, the first turbidity meter 181 has a first light source 130, a first transmitted light receiving unit 131, a first scattered light receiving unit 132, a flow path 133, and a lens 134. The first liquid 174 or the first drainage liquid 176 flows through the flow path 133. FIG. 10 is a cross-sectional view of the flow path 133. The first light source 130 may be a light source that emits light of a near-infrared wavelength, similar to the third light source 30. The first light source 130 is, for example, an LED. The light emitted by the first light source 130 is light L1. The wavelength of the light L1 may be 800 nm or more and 1000 nm or less, or 830 nm or more and 890 nm or less, similar to the wavelength of the light L3. The wavelength of the light L1 may be the same as or different from the wavelength of the light L3. In this example, the wavelength of the light L1 is 860 nm. The first light source 130 may emit the light L1 in a direction intersecting the direction in which the first liquid 174 or the first drainage liquid 176 flows.

[0079] The first transmitted light receiving unit 131 receives the first transmitted light emitted by the first light source 130 and transmitted through the first liquid 174 or the first drainage liquid 176. The first transmitted light is referred to as the first transmitted light Lt1. The first transmitted light receiving unit 131 is, for example, a photodiode. The first scattered light receiving unit 132 receives the first scattered light emitted by the first light source 130 and scattered by the first liquid 174 or the first drainage liquid 176. The first scattered light is referred to as the first scattered light Ls1. The first scattered light receiving unit 132 is, for example, a photodiode. The first scattered light receiving unit 132 may receive the first scattered light Ls1 collected by the lens 134. In this example, the first turbidity Tu1 is the ratio (Ls1 / Lt1) of the intensity of the first scattered light Ls1 to the first transmitted light Lt1. As in the case of the second turbidity Tu2, the first turbidity meter 181 may measure the first turbidity Tu1 by a so-called surface scattered light method.

[0080] FIG. 11 is a diagram showing an example of the details of the first fluorometer 183. In this example, the first fluorometer 183 has a second light source 135, a second transmitted light receiving unit 136, a first fluorescent light receiving unit 137, and a flow path 138. A first liquid 174 or a first drainage liquid 176 flows through the flow path 138. FIG. 11 is a cross-sectional view of the flow path 138. The second light source 135 may be a light source that emits light with a near-ultraviolet wavelength, similar to the fourth light source 35. The second light source 135 is, for example, an LED. The light emitted by the second light source 135 is light L2. The wavelength of the light L2 may be 200 nm or more and 380 nm or less, 220 nm or more and 300 nm or less, or 244 nm or more and 264 nm or less, similar to the wavelength of the light L4. The wavelength of the light L2 may be the same as or different from the wavelength of the light L4. In this example, the wavelength of the light L2 is 254 nm. The second light source 135 may emit light L2 in a direction intersecting the direction in which the first liquid 174 or the first drainage liquid 176 flows.

[0081] The second transmitted light receiving unit 136 receives the second transmitted light emitted by the second light source 135 and transmitted through the first liquid 174 or the first drainage liquid 176. The second transmitted light is referred to as the second transmitted light Lt2. The second transmitted light receiving unit 136 is, for example, a photodiode. The first fluorescent light receiving unit 137 receives the first fluorescent light generated when the light L2 emitted by the second light source 135 is irradiated onto the first liquid 174 or the first drainage liquid 176. The first fluorescent light is referred to as the first fluorescent light Lf1. The first fluorescent light meter 183 measures the first fluorescent light Lf1 of the first liquid 174 or the first drainage liquid 176. The first fluorescent light receiving unit 137 is, for example, a photodiode. The first fluorescent light receiving unit 137 may receive the first fluorescent light Lf1 collected by the lens 139.

[0082] The second water quality measurement value of the second water quality measuring device 80 is referred to as a second water quality measurement value Q2. The second water quality measurement value Q2 may be at least one of the intensity of the second fluorescence Lf2 and the second turbidity Tu2.

[0083] FIG. 12 is a diagram showing an example of the relationship between the second turbidity Tu2 of the second liquid 74 measured by the second turbidity meter 81 and the elapsed time t. The black circles in FIG. 12 are data corresponding to the second status information Is2 of the evaluation target of the second water quality measuring instrument 80 (the second turbidity meter 81 in this example) by the evaluation unit 14 (see FIG. 4). This data is selected as the evaluation target of the second water quality measuring instrument 80. The white squares in FIG. 12 are data corresponding to the second status information Is2 that is not the evaluation target of the second water quality measuring instrument 80. This data is excluded from the evaluation target of the second water quality measuring instrument 80.

[0084] The black circles in Fig. 12 may represent data corresponding to the second status information Is2 that is the target for generating the water quality standard value Qs (in this example, the standard value for the turbidity of the second liquid 74). The data may be selected as the data for generating the water quality standard value Qs. The white squares in Fig. 12 may represent data corresponding to the second status information Is2 that is not the target for generating the water quality standard value Qs. The data may be excluded from the data for generating the water quality standard value Qs.

[0085] The second status information Is2 that is not the subject of evaluation by the second water quality measuring device 80 may include a case where the output of the power unit 60 (see FIG. 1) is zero. The second status information Is2 that is not the subject of evaluation by the second water quality measuring device 80 may include a case where the flow rate of the second liquid 74 or the flow rate of the second drainage liquid 76 is zero. The second status information Is2 that is not the subject of generation of the water quality standard value Qs may include a case where the output of the power unit 60 (see FIG. 1) is zero. The second status information Is2 that is not the subject of generation of the water quality standard value Qs may include a case where the flow rate of the second liquid 74 or the flow rate of the second drainage liquid 76 is zero.

[0086] The evaluation unit 14 (see FIG. 4) may select the condition of the target ship 200 for evaluating the second water quality measuring instrument 80 based on the position information Ip. The position information acquisition unit 58 (see FIG. 1) may acquire the distance between the nautical position of the target ship 200 and the land closest to the nautical position. This distance is defined as distance h. The evaluation unit 14 (see FIG. 4) may select the condition of the target ship 200 for evaluating the second water quality measuring instrument 80 based on distance h.

[0087] Distance h is the threshold distance h th If the distance h is less than the threshold distance h, the power unit 60 (see FIG. 1) may be shut down in preparation for anchoring. This may cause the power output Pw of the power unit 60 to become zero. th If the distance h is less than the threshold distance h, the target exhaust gas treatment device 70 (see FIG. 1) may be stopped in preparation for anchorage. This may cause the flow rate of the second liquid 74 and the flow rate of the second drainage liquid 76 to become zero. As a result, the distance h may become equal to or smaller than the threshold distance h th If the distance h is less than the threshold distance h, the second turbidity Tu2 of the second liquid 74 is likely to become unstable. th If the distance h is less than the threshold distance h, the data may be included in the data to be excluded. th If it is less than this, the second water quality measuring device 80 does not need to be evaluated.

[0088] Distance h is the threshold distance h th If the distance h is equal to or greater than the threshold distance h, the target ship 200 is sailing offshore, and therefore the power unit 60 and the target exhaust gas treatment device 70 may be in operation. For this reason, the second turbidity Tu2 of the second liquid 74 is likely to be stable. For this reason, the evaluation unit 14 (see FIG. 4) determines whether the distance h is equal to or greater than the threshold distance h th If so, the second water quality measuring device 80 may be evaluated.

[0089] The evaluation unit 14 (see FIG. 4) may evaluate the second water quality measuring device 80 when the target ship 200 (see FIG. 1) is in a selected state. In this example, the evaluation unit 14 evaluates the second water quality measuring device 80 based on the data of the black circles shown in FIG. 12. The generation unit 12 (see FIG. 4) may generate a water quality standard value Qs when the target ship 200 (see FIG. 1) is in a selected state. The generation unit 12 may generate the water quality standard value Qs based on the data of the black circles shown in FIG. 12.

[0090] FIG. 13 is a diagram showing an example of data after preprocessing for the measurement value of the second turbidity Tu2 selected as the evaluation target of the second water quality measuring instrument 80 in FIG. 12. The preprocessing is, for example, an averaging process. The preprocessing may be performed on the data indicated by the black circles in FIG. 12. The averaging process may be a process of averaging the measurement values ​​of the second turbidity Tu2 over 12 hours, or may be a process of averaging the measurement values ​​over 24 hours. The averaging process may be performed over a period from a predetermined point in the past to the present. The point in the past may be two months ago, four months ago, or six months ago. In FIG. 7, the data after preprocessing is indicated by a black solid line.

[0091] FIG. 14 is a diagram showing an example of the relationship between the data after preprocessing in FIG. 13 and the second turbidity Tu2. The second exhaust gas 62 (see FIG. 1) may contain harmful substances such as sulfur oxides and nitrogen oxides. Therefore, the second liquid 74 or the second drainage liquid 76, or the second turbidity meter 81 may be contaminated by the harmful substances as time t elapses. The measurement value of the second turbidity Tu2 by the second turbidity meter 81 may change as time t elapses. In this example, the measurement value of the second turbidity Tu2 decreases as time t elapses. In this example, the time rate of change of the measurement value of the second turbidity Tu2 is constant regardless of the elapsed time t.

[0092] The evaluation unit 14 (see FIG. 4) evaluates the second optical water quality measuring device 80 based on the second status information Is2, the first status information Is1 (see FIG. 5), the first water quality measurement value Q1 (see FIG. 5), and the second water quality measurement value Q2. The generation unit 12 (see FIG. 4) may generate a water quality standard value Qs based on the second status information Is2, the first status information Is1 (see FIG. 5), and the first water quality measurement value Q1 (see FIG. 5). The evaluation unit 14 may evaluate the second optical water quality measuring device 80 based on the second water quality measurement value Q2 and the water quality standard value Qs.

[0093] When the first status information Is1 is stored in the memory unit 10, the first status information Is1 stored in the memory unit 10 may be information indicating a past status of the reference ship 300. The first water quality measurement value Q1 stored in the memory unit 10 may be at least one of the past water quality of the first liquid 174 and the water quality Q1 of the first discharged liquid 176 measured by the first water quality measuring device 180 of the reference ship 300. The first status information Is1 may be information indicating a current status of the reference ship 300 during a voyage. The first water quality measurement value Q1 may be at least one of the current water quality of the first liquid 174 and the water quality Q1 of the first discharged liquid 176 measured by the first water quality measuring device 180 of the reference ship 300 during a voyage. The water quality standard value Qs is a standard value of the water quality Q1 when the target ship 200 (see FIG. 1) is in a state indicated in the second status information Is2.

[0094] The evaluation unit 14 (see FIG. 4) may evaluate the second water quality measuring instrument 80 based on the position information Ip of the target ship 200 (see FIG. 1), the nautical position of the reference ship 300 (see FIG. 2), and the first water quality measurement value Q1 when the reference ship 300 is at that nautical position. The generation unit 12 (see FIG. 4) may generate the water quality standard value Qs based on the position information Ip of the target ship 200, the nautical position of the reference ship 300, and the first water quality measurement value Q1 when the reference ship 300 is at that nautical position. It is assumed that at a time t1 shown in FIG. 14, the target ship 200 is sailing at a nautical position Ps1 with a power Pw1. The reference value of water quality when the target ship 200 is in the state indicated in the second status information Is2 may be the first water quality measurement value Q1 (see FIG. 5) when one or more reference ships 300 are sailing at the same navigation position Ps1 with the same power Pw1. The memory unit 10 (see FIG. 4) may store the navigation positions of the reference ship 300 and the first water quality measurement value Q1 when the reference ship 300 is at the navigation position (see FIG. 5).

[0095] The difference between the second water quality measurement value Q2 and the water quality standard value Qs is defined as the difference d. The evaluation unit 14 may evaluate the second water quality measuring device 80 based on the difference d. The evaluation unit 14 may evaluate the difference d based on the difference d. th If the difference d is less than the threshold value d, the second water quality measuring device 80 may be evaluated as normal.th If so, it may be assessed that the second water quality measuring device 80 should be calibrated or replaced.

[0096] The reference ship 300 and the target ship 200 may be different ships or may be the same ship. When the reference ship 300 and the target ship 200 are the same ship, the evaluation unit 14 (see FIG. 4) evaluates the current second water quality measuring device 80 of the ship based on the past second water quality measurement value Q2 of the ship. When there are multiple reference ships 300, the target ship 200 may be a ship different from any of the multiple reference ships 300, or may be the same ship as one of the multiple reference ships 300. The generation unit 12 (see FIG. 4) may generate a water quality standard value Qs based on the past first status information Is1 and the past first water quality standard value Q1 of the target ship 200, and the evaluation unit 14 may evaluate the current second water quality measuring device 80 based on the water quality standard value Qs.

[0097] The manner in which the water quality Q2 measured by the second water quality measuring device 80 (see FIG. 1) changes over time t may depend on the water quality of the second liquid 74 or the second effluent 76. The water quality of the second liquid 74 or the second effluent 76 may differ depending on the ocean in which the target ship 200 sails. Therefore, the manner in which the water quality Q2 changes over time t may differ for each second water quality measuring device 80. The evaluation unit 14 evaluates the second water quality measuring device 80 based on the second status information Is2, the first status information Is1 (see FIG. 5), and the first water quality measurement value Q1 (see FIG. 5). Therefore, a highly reliable evaluation result of the second water quality measuring device 80 may be obtained.

[0098] When evaluating the second water quality measuring device 80 individually, it is preferable to evaluate the second water quality measuring device 80 removed from the target exhaust gas treatment device 70. For this reason, when evaluating the second water quality measuring device 80 individually, the target exhaust gas treatment device 70 may be stopped. For this reason, it is difficult to evaluate the second water quality measuring device 80 individually while the target ship 200 is sailing. In the sensor evaluation device 100, the evaluation unit 14 (see FIG. 4) evaluates the second water quality measuring device 80 based on the second status information Is2, the first status information Is1 (see FIG. 5), and the first water quality measurement value Q1 (see FIG. 5). For this reason, even when the target ship 200 is sailing, it is possible to evaluate the second water quality measuring device 80.

[0099] Fig. 15 is a diagram showing an example of the route of the target ship 200. After navigating the first sea area A1, the target ship 200 navigates the second sea area A2. In Fig. 15, the route of the target ship 200 is indicated by an arrow. It is assumed that the regulatory value for the concentration of particulate matter contained in the second exhaust gas 62 (see Fig. 1) in the first sea area A1 is different from the regulatory value in the second sea area A2. In Fig. 15, the boundary between the first sea area A1 and the second sea area A2 is indicated by a dashed line.

[0100] In a case where the first water quality measuring instrument 180 (see FIG. 2) has a first turbidity meter 181 and the second water quality measuring instrument 80 (see FIG. 1) has a second turbidity meter 81, the evaluation unit 14 (see FIG. 4) may evaluate the second water quality measuring instrument 80 based on the first turbidity Tu1 and the second turbidity Tu2. The evaluation unit 14 may evaluate the second turbidity meter 81 based on the first turbidity Tu1 and the second turbidity Tu2. The evaluation unit 14 may evaluate the second turbidity meter 81 based on the second status information Is2, the first status information Is1 (see FIG. 5), and the first turbidity Tu1 and the second turbidity Tu2 when the reference ship 300 is in the status indicated in the first status information Is1.

[0101] In the case where the first water quality measuring instrument 180 (see FIG. 2) has a first turbidity meter 181 and the second water quality measuring instrument 80 (see FIG. 1) has a second turbidity meter 81, the evaluation unit 14 (see FIG. 4) may evaluate the second water quality measuring instrument 80 based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first transmitted light Lt1 (see FIG. 10), and the intensity of the third transmitted light Lt3 (see FIG. 7). The evaluation unit 14 may evaluate the second turbidity meter 81 based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first transmitted light Lt1, and the intensity of the third transmitted light Lt3. The evaluation unit 14 may evaluate the second turbidity meter 81 based on the second status information Is2, the first status information Is1, the intensity of the first transmitted light Lt1 and the first turbidity Tu1 when the reference ship 300 is in the state indicated in the first status information Is1, and the intensity of the third transmitted light Lt3 and the second turbidity Tu2 when the target ship 200 is in the state indicated in the second status information Is2.

[0102] The ratio (Tu2 / Tu1) of the second turbidity Tu2 to the first turbidity Tu1 is defined as the turbidity ratio RT. A predetermined threshold value of the turbidity ratio RT is defined as the turbidity threshold value RTh. The ratio (Lt3 / Lt1) of the intensity of the third transmitted light Lt3 to the intensity of the first transmitted light Lt1 is defined as the transmitted light intensity ratio RL. A predetermined threshold value of the transmitted light intensity ratio RL is defined as the transmitted light intensity threshold value RLh.

[0103] When the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, the evaluation unit 14 (see FIG. 4) may evaluate that the second water quality measuring instrument 80 (in this example, the second turbidimeter 81) is contaminated, or that the second liquid 74 or the second drainage liquid 76 is contaminated. The transmitted light intensity threshold RLh is a threshold that serves as a criterion for the evaluation unit 14 to evaluate the contamination of the second turbidimeter 81, or the second liquid 74 or the second drainage liquid 76. The transmitted light intensity threshold RLh may be 3 / 4, 1 / 2, 1 / 3, or 1 / 4.

[0104] The intensity of the first transmitted light Lt1 may be the intensity of the light L1 (see FIG. 10) transmitted through the first liquid 174 or the first effluent 176 when one or more reference ships 300 are in a state indicated by the first status information Is1. Therefore, when the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, there is a high probability that the second turbidimeter 81 is contaminated, or the second liquid 74 or the second effluent 76 is contaminated.

[0105] The evaluation unit 14 (see FIG. 4) may evaluate that the second water quality measuring instrument 80 (the second turbidimeter 81 in this example) is contaminated, or that the second liquid 74 or the second drainage liquid 76 is contaminated, when the turbidity ratio RT is greater than the turbidity threshold value RTh and the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold value RLh. When the first turbidimeter 181 and the second turbidimeter 81 are similarly contaminated, the intensity of the first transmitted light Lt1 and the intensity of the third transmitted light Lt3 may decrease similarly, and the intensity of the first scattered light Ls1 and the intensity of the second scattered light Ls2 may decrease similarly. Therefore, when the first turbidimeter 181 and the second turbidimeter 81 are similarly contaminated, the ratio (Ls1 / Lt1) and the ratio (Ls2 / Lt3) may be similar values ​​regardless of the contaminated state of the first turbidimeter 181 and the second turbidimeter 81. For this reason, even if the turbidity ratio RT is greater than the turbidity threshold value RTh, if the transmitted light intensity ratio RL is greater than the transmitted light intensity threshold value RLh, there is a high probability that the second turbidimeter 81 is contaminated. The same is true when the first liquid 174 and the second liquid 74 are similarly contaminated, or when the first drainage liquid 176 and the second drainage liquid 76 are similarly contaminated.

[0106] When the target ship 200 is navigating any of a plurality of sea areas (including the first sea area A1 and the second sea area A2 described below) and the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, the evaluation unit 14 (see Figure 4) may evaluate that the second water quality measuring instrument 80 (in this example, the second turbidity meter 81) is contaminated, or that the second liquid 74 or the second wastewater 76 in the sea area in which the target ship 200 is navigating is contaminated.

[0107] When the target ship 200 is navigating the first sea area A1 and the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, and when the target ship 200 is navigating the second sea area A2 and the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, the evaluation unit 14 (see FIG. 4) may evaluate that the second water quality measuring instrument 80 (in this example, the second turbidity meter 81) is contaminated. The first transmission unit 20 (see FIG. 4) of the sensor evaluation device 100 may transmit information to the second receiving unit 56 (see FIG. 1) of the target ship 200 instructing cleaning of the second water quality measuring instrument 80 (in this example, the second turbidity meter 81).

[0108] When the regulatory value of the particulate matter concentration in the first sea area A1 is different from the regulatory value of the particulate matter concentration in the second sea area A2, there is a high probability that the water quality of the second liquid 74 (seawater in this example) in the first sea area A1 is different from the water quality of the second liquid 74 in the second sea area A2. Therefore, even if the regulatory value of the particulate matter concentration in the first sea area A1 is different from the regulatory value of the particulate matter concentration in the second sea area A2, when the transmitted light intensity ratio RL while the target ship 200 is navigating the first sea area A1 and the second sea area A2 is larger than the transmitted light intensity threshold RLh, there is a high probability that the second water quality measuring device 80 (the second turbidity meter 81 in this example) is contaminated.

[0109] When the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh while the target ship 200 is navigating the first sea area A1, and when the transmitted light intensity ratio RL is equal to or greater than the transmitted light intensity threshold RLh while the target ship 200 is navigating the second sea area A2, the evaluation unit 14 (see FIG. 4) may evaluate that the second liquid 74 or the second effluent 76 is contaminated. As described above, when the regulated value of the concentration of particulate matter in the first sea area A1 is different from the regulated value of the concentration of particulate matter in the second sea area A2, there is a high probability that the water quality of the second liquid 74 (seawater in this example) in the first sea area A1 is different from the water quality of the second liquid 74 in the second sea area A2. Therefore, when the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh while the target ship 200 is navigating the first sea area A1, and when the transmitted light intensity ratio RL is equal to or greater than the transmitted light intensity threshold RLh while the target ship 200 is navigating the second sea area A2, the second liquid 74 (seawater in this example) in the first sea area A1 is more likely to be polluted than the second liquid 74 (seawater in this example) in the second sea area A2. Similarly, when the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh while the target ship 200 is navigating the second sea area A2, and when the transmitted light intensity ratio RL is equal to or greater than the transmitted light intensity threshold RLh while the target ship 200 is navigating the first sea area A1, the evaluation unit 14 may evaluate that the second liquid 74 or the second discharged liquid 76 in the second sea area A2 is polluted.

[0110] The evaluation unit 14 (see FIG. 4) may evaluate the second water quality measuring instrument 80 (see FIG. 1) based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first fluorescence Lf1, and the intensity of the second fluorescence Lf2. The evaluation unit 14 may evaluate the second water quality measuring instrument based on the second status information Is2, the first status information Is1, the intensity of the first fluorescence Lf1 and the first turbidity Tu1 when the one or more reference ships 300 are in the status indicated in the first status information Is1, and the intensity of the second fluorescence Lf2 and the second turbidity Tu2 when the target ship 200 is in the status indicated in the second status information Is2.

[0111] The evaluation unit 14 (see FIG. 4) may evaluate the second fluorometer 83 (see FIG. 6) based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first fluorescence Lf1, and the intensity of the second fluorescence Lf2. The evaluation unit 14 may evaluate the fourth light source 35 (see FIG. 8) of the second fluorometer 83 based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first fluorescence Lf1, and the intensity of the second fluorescence Lf2.

[0112] The ratio (Ls2 / Ls1) of the intensity of the second fluorescence Ls2 to the intensity of the first fluorescence Ls1 is defined as the fluorescence intensity ratio RS. A predetermined threshold value of the fluorescence intensity ratio RS is defined as the fluorescence intensity threshold value RSh.

[0113] The evaluation unit 14 (see FIG. 4) may evaluate that the second liquid 74 or the second drainage liquid 76 is contaminated when the turbidity ratio RT is equal to or less than the turbidity threshold value RTh and the fluorescence intensity ratio RS is smaller than the fluorescence intensity threshold value RSh. When the turbidity ratio RT is equal to or less than the turbidity threshold value RTh and the fluorescence intensity ratio RS is smaller than the fluorescence intensity threshold value RSh, this occurs when the second turbidity Tu2 deviates from the first turbidity Tu1 and the intensity of the second fluorescence Lf2 deviates from the intensity of the first fluorescence Lf1. If there is a discrepancy between the second water quality measurement value Q2 of one type from the second water quality measuring device 80 and the first water quality measurement value Q1 of that one type from the first water quality measuring device 180, and there is also a discrepancy between the second water quality measurement value Q2 of another type from the second water quality measuring device 80 and the first water quality measurement value Q1 of that other type from the first water quality measuring device 180, there is a high probability that the second liquid 74 or the second wastewater 76 is contaminated.

[0114] The turbidity threshold RTh may be 3 / 4, 1 / 2, 1 / 3, or 1 / 4. The fluorescence intensity threshold RSh may be 3 / 4, 1 / 2, 1 / 3, or 1 / 4.

[0115] The evaluation unit 14 (see FIG. 4) may evaluate that the second turbidity meter 81 is contaminated when the turbidity ratio RT is equal to or less than the turbidity threshold value RTh and the fluorescence intensity ratio RS is equal to or more than the fluorescence intensity threshold value RSh. When the fluorescence intensity ratio RS is equal to or more than the fluorescence intensity threshold value RSh, the second liquid 74 or the second effluent 76 is highly likely not to be contaminated. Therefore, when the turbidity ratio RT is equal to or less than the turbidity threshold value RTh and the fluorescence intensity ratio RS is equal to or less than the fluorescence intensity threshold value RSh, the second turbidity meter 81 is highly likely to be contaminated. The first transmission unit 20 (see FIG. 4) of the sensor evaluation device 100 may transmit information to the second reception unit 56 (see FIG. 1) of the target ship 200 instructing cleaning of the second turbidity meter 81.

[0116] The evaluation unit 14 (see FIG. 4) may evaluate that the second fluorometer 83 is contaminated when the turbidity ratio RT is greater than the turbidity threshold RTh and the fluorescence intensity ratio RS is less than the fluorescence intensity threshold RSh. The evaluation unit 14 may evaluate that the second fluorometer 83 is contaminated when the turbidity ratio RT is greater than the turbidity threshold RTh and the transmitted light intensity ratio RL of the intensity of the third transmitted light Lt3 (see FIG. 7) to the intensity of the first transmitted light Lt1 (see FIG. 10) is greater than the transmitted light intensity threshold RLh and the fluorescence intensity ratio RS is less than the fluorescence intensity threshold RSh. When the turbidity ratio RT is greater than the turbidity threshold RTh and the transmitted light intensity ratio RL is greater than the transmitted light intensity threshold RLh, there is a high probability that the second liquid 74 or the second drainage liquid 76 is not contaminated. Therefore, when the turbidity ratio RT is greater than the turbidity threshold RTh, the transmitted light intensity ratio RL is greater than the transmitted light intensity threshold RLh, and the fluorescence intensity ratio RS is smaller than the fluorescence intensity threshold RSh, there is a high probability that the second fluorescent meter 83 is contaminated. The first transmitting unit 20 (see FIG. 4) of the sensor evaluation device 100 may transmit information to the second receiving unit 56 (see FIG. 1) of the target ship 200 instructing the second fluorescent meter 83 to be cleaned.

[0117] The evaluation unit 14 (see FIG. 4) may evaluate the second fluorometer 83 based on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4. The evaluation unit 14 may evaluate the fourth light source 35 of the second fluorometer 83 based on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4. As shown in FIG. 6, in the second water quality measuring instrument 80 of this example, the second liquid 74 or the second drainage liquid 76 passes through the flow path 38 (see FIG. 8) of the second fluorometer 83, and then passes through the flow path 33 (see FIG. 7) of the second turbidimeter 81. Therefore, the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 can be equal. Therefore, the evaluation unit 14 can evaluate the second fluorometer 83 based on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4.

[0118] The ratio of the intensity of the fourth transmitted light Lt4 to the intensity of the third transmitted light Lt3 (Lt4 / Lt3) is the transmitted light intensity ratio RL'. A predetermined threshold of the transmitted light intensity ratio RL' is the transmitted light intensity threshold RLh'. The transmitted light intensity threshold RLh' is a threshold that serves as a reference for the evaluation unit 14 to evaluate the deterioration of the second fluorometer 83. If the fourth light source 35 continues to emit light L4 (see FIG. 8), the fourth light source 35 may deteriorate over time. If the fourth light source 35 deteriorates, the intensity of the light L4 may become smaller than before the fourth light source 35 deteriorated. If the intensity of the light L4 becomes smaller, the intensity of the fourth transmitted light Lt4 may become smaller. If the second fluorometer 83 is not deteriorated, the transmitted light intensity threshold RLh' may be zero. When the transmitted light intensity ratio RL' is smaller than the transmitted light intensity threshold RLh', the evaluation unit 14 (see FIG. 4) may evaluate the second fluorometer 83 as degraded, and may evaluate the fourth light source 35 as degraded. The transmitted light intensity threshold RLh' may be 3 / 4, 1 / 2, 1 / 3, or 1 / 4.

[0119] The intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 may be corrected based on the temperature of the second liquid 74 or the second drainage liquid 76 measured by a thermometer 99 (FIG. 6). The intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 may change depending on the temperature of the second liquid 74 or the second drainage liquid 76. By correcting the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 based on the temperature of the second liquid 74 or the second drainage liquid 76, the influence of the temperature on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 can be reduced. The evaluation unit 14 (see FIG. 4) may evaluate the second fluorometer 83 and may evaluate the fourth light source 35 based on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4 corrected based on the temperature of the second liquid 74 or the second drainage liquid 76.

[0120] Fig. 16 is a diagram showing an example of the relationship between the intensity of the second fluorescence Lf2 of the second liquid 74 and the elapsed time t measured by the second fluorometer 83. Fig. 16 shows the relationship between the intensity of the second fluorescence Lf2 and the elapsed time t after selection of the evaluation target data (see Fig. 12) and pre-processing of the data (see Fig. 13).

[0121] The evaluation result of the second water quality measuring instrument 80 (second fluorometer 83 (fourth light source 35 in this example, see FIG. 8)) by the evaluation unit 14 (see FIG. 4) is defined as the evaluation result Rs. The calculation unit 18 (see FIG. 4) may calculate the calibration time tc or replacement time tf of the second fluorometer 83 based on the evaluation result Rs. The calculation unit 18 may calculate the time tf at which the intensity of the second fluorescence Lf2 reaches the lower limit Qmin based on the evaluation result Rs. The time tf may be the replacement time for the second fluorometer 83. The calculation unit 18 may calculate the number of days remaining until the replacement time tf based on the evaluation result Rs. In FIG. 16, the number of days remaining is indicated by a double-headed arrow. The calibration time tc may be any time between time t1 and time tf.

[0122] The calibration time tc or the replacement time tf calculated by the calculation unit 18 may be transmitted to the target ship 200 (see FIG. 1) by the first transmission unit 20 (see FIG. 4). The first transmission unit 20 may transmit the calibration time tc or the replacement time tf to the target ship 200 via an Internet line.

[0123] By the calculation unit 18 (see FIG. 4) calculating the calibration time tc or replacement time tf of the second fluorescent meter 83, the crew of the target ship 200 can know in advance at time t1 the calibration time tc or replacement time tf of the second fluorescent meter 83. The second fluorescent meter 83 may be calibrated to the calculated calibration time tc.

[0124] The calibration unit 11 (see FIG. 4) may calibrate the second fluorometer 83 based on the evaluation result Rs. The first transmission unit 20 may transmit calibration information of the second fluorometer 83 based on the evaluation result Rs to the second reception unit 56. The calibration information is information related to calibration for bringing the measured value of the intensity of the second fluorescence Lf2 measured by the second fluorometer 83 closer to the true value of the intensity of the second fluorescence Lf2. The calibration information may be an indicated value of the second fluorescence Lf2 or a calibration amount of the second fluorescence Lf2. The calibration unit 11 may calibrate the second fluorometer 83 in real time while the target ship 200 is sailing.

[0125] Fig. 17 is a diagram showing another example of the relationship between the intensity of the second fluorescence Lf2 of the second liquid 74 measured by the second fluorometer 83 and the elapsed time t. In this example, the time rate of change of the intensity of the second fluorescence Lf2 increases with the elapsed time t. In Fig. 17, the relationship between the intensity of the second fluorescence Lf2 and the elapsed time t shown in Fig. 16 is indicated by a rough dashed line.

[0126] The calculation unit 18 (see FIG. 4) may calculate the calibration time tf or replacement time tc of the second fluorescence meter 83 based on the change over time of the second fluorescence Lf2. The change over time of the second fluorescence Lf2 may be a time change rate. This allows the crew of the target ship 200 to know in advance the calibration time tc or replacement time tf of the second water quality measuring instrument 80 at time t1.

[0127] FIG. 18 is a diagram showing another example of the route of the target ship 200. The target ship 200 is assumed to be heading from port A to port B. The target ship 200 is assumed to be scheduled to head to port C after anchoring at port B. The current position of the target ship 200 is assumed to be position P. The target ship 200 may sail on route A or route B from position P to port B. In this example, the sensor evaluation device 100 is located on land at port A.

[0128] The calculation unit 18 (see FIG. 4) may calculate the calibration time tc or the replacement time tf based on the planned route of the target ship 200. The calculation unit 18 may calculate the calibration time tc or the replacement time tf for each of a plurality of planned routes. In this example, the calculation unit 18 calculates the calibration time tc or the replacement time tf for route A, and the calibration time tc or the replacement time tf for route B. When the first water quality measurement value Q1 for each position of the reference ship 300 is stored in the memory unit 10 (see FIG. 4) (see FIG. 5), the calculation unit 18 (see FIG. 4) can calculate the calibration time tc or the replacement time tf for each route. The crew of the target ship 200 may select one of the plurality of planned routes based on the calculated calibration time tc or replacement time tf.

[0129] The calculation unit 18 (see FIG. 4) may determine a position for replacing the second fluorometer 83 based on the calculated replacement time tf and position information Ip of the target ship 200 (see FIG. 1). The position for replacing the second fluorometer 83 may be the position where the target ship 200 is scheduled to be anchored. In this example, the calculation unit 18 determines whether to replace the second fluorometer 83 at port B or port C based on the replacement time tf and the position P of the target ship 200.

[0130] When replacing the second fluorometer 83, it is preferable that the target exhaust gas treatment device 70 (see FIG. 1) is stopped. For this reason, it is preferable that the second fluorometer 83 is replaced while the target ship 200 (see FIG. 1) is at anchor. By calculating the replacement time tf based on the evaluation result Rs of the second fluorometer 83, the calculation unit 18 can determine whether the second fluorometer 83 will be replaced at port B or port C while the target ship 200 is sailing. The crew of the target ship 200 can contact the port determined by the calculation unit 18 to have a replacement second fluorometer 83 prepared in advance.

[0131] Fig. 19 is a diagram showing another example of the storage manner of the first status information Is1 and the first water quality measurement value Q1 by the storage unit 10 (see Fig. 4). In this example, the storage unit 10 stores the water quality Q11 of the first liquid 174 (see Fig. 2) measured by one first water quality measuring device 180-1 (see Fig. 2), and the water quality Q12 of the first wastewater 176 (see Fig. 2) measured by another first water quality measuring device 180-2.

[0132] In this example, it is assumed that one first water quality measuring device 180-1 has one first turbidity meter 181-1 and one first fluorescent meter 183-1, and the other first water quality measuring device 180-2 has another first turbidity meter 181-2 and another first fluorescent meter 183-2. In this example, it is assumed that water quality Q11 is the first turbidity Tu1a of the first liquid 174 measured by one first turbidity meter 181-1, and water quality Q12 is the first turbidity Tu1b of the first effluent 176 measured by the other first turbidity meter 181-2.

[0133] The evaluation unit 14 (see FIG. 4) may evaluate the other second water quality measuring device 80-2 based on the evaluation result Rs of the one second water quality measuring device 80-1 (see FIG. 1). The evaluation unit 14 may evaluate the other second water quality measuring device 80-2 based on the one first water quality measurement value Q11, the other first water quality measurement value Q12, and the output Pw value of the power unit 160 (see FIG. 2), and the evaluation result Rs of the one second water quality measuring device 80-1.

[0134] The water quality Q measured by one second water quality measuring device 80-1 (see FIG. 1) is defined as water quality Q21, and the water quality Q measured by the other second water quality measuring device 80-2 is defined as water quality Q22. The relationship between the water quality Q21 and the water quality Q22 when the target ship 200 (see FIG. 1) is navigating at one navigation position Ps1 with one power Pw1 tends to be close to the relationship between the first water quality measurement value Q11 and the first water quality measurement value Q12 when the reference ship 300 (see FIG. 2) is navigating at the same navigation position Ps1 with the same power Pw1. Therefore, the evaluation unit 14 (see FIG. 4) can evaluate the other second water quality measuring device 80-2 based on the one first water quality measurement value Q11, the other first water quality measurement value Q12, the power unit output Pw value, and the evaluation result Rs of the one second water quality measuring device 80-1.

[0135] FIG. 20 is a diagram showing an example of the relationship between the target ship 210 and the sensor evaluation device 100 and the sensor evaluation system 400. In FIG. 20, the range of the target ship 210 is indicated by a dashed line, and the range of the sensor evaluation system 400 is indicated by a rough dashed line. The target ship 210 differs from the target ship 200 (see FIG. 1) in that it has a switching unit 90 and a switching unit 92. The switching unit 92 switches whether the second effluent 76 is discharged to the outside of the target exhaust gas treatment device 70 or the second effluent 76 is introduced again into the target exhaust gas treatment device 70. The switching unit 90 switches whether the second liquid 74 is introduced into the target exhaust gas treatment device 70 or the second effluent 76 is introduced. The switching unit 90 and the switching unit 92 are, for example, three-way valves.

[0136] When the second effluent 76 is introduced again into the target exhaust gas treatment device 70, the second effluent 76 circulates through the pump 72, the target exhaust gas treatment device 70, the switching unit 92, and the switching unit 90. A system in which the second effluent 76 circulates in this manner is called a closed loop system. A system in which the second effluent 76 does not circulate is called an open loop system.

[0137] The evaluation unit 14 (see FIG. 4) may evaluate the other second water quality measuring device 80-2 based on the evaluation result Rs of one second water quality measuring device 80-1. In the case of the closed-loop system, the water quality Q2 of the second drainage liquid 76 is likely to deteriorate as the second drainage liquid 76 circulates. For this reason, it is preferable that the other second water quality measuring device 80-2 is evaluated based on the evaluation result Rs of the one second water quality measuring device 80-1.

[0138] 21 is a diagram showing another example of the relationship between the target ship 200, the sensor evaluation device 100, and the sensor evaluation system 400. In this example, the target ship 200 has a calibration unit 11 and a memory unit 10. In this example, the sensor evaluation device 100 does not need to have the calibration unit 11 and the memory unit 10.

[0139] The first transmitting unit 20 (see FIG. 4) of the sensor evaluation device 100 transmits the evaluation result Rs of the second fluorometer 83 by the evaluation unit 14 (see FIG. 4) to the target ship 200. The second receiving unit 56 receives the evaluation result Rs. In this example, the calibration unit 11 of the target ship 200 calibrates the second fluorometer 83 based on the evaluation result Rs. The calibration unit 11 may calibrate the second fluorometer 83 in real time while the target ship 200 is sailing.

[0140] 22 is a diagram showing an example of the evaluation inference model 110. The evaluation inference model 110 performs machine learning of the relationship between the first water quality measurement value Q1 and the evaluation result Rs of the second water quality measuring instrument 80. When the second water quality measurement value Q2 of the second water quality measuring instrument 80 is input, the evaluation inference model 110 outputs evaluation inference data indicating the evaluation result Rs for the second water quality measurement value Q2.

[0141] FIG. 23 is a block diagram showing another example of a sensor evaluation device 100 according to an embodiment of the present invention. In this example, the memory unit 10 has an evaluation learning unit 19. The evaluation learning unit 19 generates an evaluation inference model 110 (see FIG. 22). The evaluation inference model 110 performs machine learning on the relationship between the first water quality measurement value Q1 and the evaluation result Rs of the second water quality measuring instrument 80. This makes it easier to improve the reliability of the evaluation result Rs for the second water quality measurement value Q2.

[0142] Fig. 24 is a flowchart showing an example of a sensor evaluation method according to an embodiment of the present invention. The sensor evaluation method according to an embodiment of the present invention will be described using the reference ship 300 and the sensor evaluation device 100 shown in Fig. 2 as examples. The sensor evaluation method may include a storage step S100, a first status information acquisition step S200, a status selection step S202, a data processing step S204, a first water quality measurement value calculation step S206, and a judgment step S208.

[0143] The first status information acquisition step S200 is a step in which the first receiving unit 22 (see FIG. 4) acquires first status information Is1 indicating the status of one or more reference ships 300 from the reference ships 300. The status selection step S202 is a step in which the evaluation unit 14 (see FIG. 4) selects the first status information Is1 that is the subject of calculation of the first water quality measurement value Q1.

[0144] The first status information Is1 that is not a target for calculating the first water quality standard value Q1 may include a case where the output of the power unit 160 (see FIG. 2) is zero. The first status information Is1 that is not a target for generating the first water quality standard value Q1 may include a case where the flow rate of the first liquid 174 or the flow rate of the first drainage liquid 176 is zero.

[0145] The state selection step S202 may include a step in which the position information acquisition unit 158 ​​(see FIG. 2) acquires position information Ip' of the reference ship 300. The state selection step S202 may include a step in which the position information acquisition unit 158 ​​(see FIG. 2) acquires the distance between the nautical position of the reference ship 300 and the land closest to the nautical position. The state selection step S202 may be a step in which the evaluation unit 14 (see FIG. 4) selects first state information Is1, which is to be used to calculate the first water quality measurement value Q1, based on the distance.

[0146] The data processing step S204 is a step in which the evaluation unit 14 (see FIG. 4) performs preprocessing on the water quality measurement data of the first liquid 174 or the first drainage liquid 176 measured by the first water quality measuring instrument 180. The preprocessing may be an averaging process on the water quality measurement data of the first liquid 174 or the first drainage liquid 176. The averaging process may be a process of averaging the measurement values ​​of the water quality Q1 over a 12-hour period. The averaging process may be performed over a period from a predetermined point in the past to the present.

[0147] The first water quality measurement value calculation step S206 is a step of calculating a first water quality measurement value Q1 when the reference ship 300 is in the state indicated by the first state information Is1. The first water quality measurement value calculation step S206 may be a step in which the calculation unit 18 (see FIG. 4) calculates the first water quality measurement value Q1 from the water quality measurement data of the first liquid 174 or the first wastewater 176 that has been data-processed in the data processing step S204.

[0148] The storage step S100 is a step in which the memory unit 10 (see FIG. 4) stores the first status information Is1 and the first water quality measurement value Q1 calculated in the first water quality measurement value calculation step S206. The storage step S100 may be a step in which the first status information Is1 and the first water quality measurement value Q1 are stored for each of a plurality of reference ships 300. In the storage step S100, the first status information Is1 and the first water quality measurement value Q1 may be stored in the manner shown in FIG. 5 or FIG. 19.

[0149] The determination step S208 is a step in which the control unit 16 (see FIG. 4) determines whether to continue water quality measurement of the first liquid 174 or the first drainage liquid 176 by the first water quality measuring instrument 180. The determination step S208 may be a step in which the control unit 16 determines whether water quality data of the first liquid 174 or the first drainage liquid 176 sufficient for evaluating the second water quality measuring instrument 80 in the evaluation step S104 (described later) has been acquired.

[0150] If it is determined in decision step S208 that the water quality measurement should be continued, the sensor evaluation method returns to the first status information acquisition step S200. If it is determined in decision step S208 that the water quality measurement should not be continued, the sensor evaluation method ends the water quality measurement of the first liquid 174 or the first drainage liquid 176.

[0151] Figure 25 is a flowchart showing an example of a sensor evaluation method according to an embodiment of the present invention. A sensor evaluation method according to an embodiment of the present invention will be described using the target ship 200 and sensor evaluation device 100 shown in Figure 1 as an example. The sensor evaluation method includes an evaluation step S104. The sensor evaluation method may include a storage step S100, a generation step S102, a second status information acquisition step S90, a status selection step S92, and a data processing step S94. In Figure 25, the range of the evaluation step S104 is indicated by a dashed line.

[0152] The second status information acquisition step S90 is a step in which the first receiving unit 22 (see FIG. 4) acquires second status information Is2 indicating the status of the target ship 200 from the target ship 200. The status selection step S92 is a step in which the evaluation unit 14 (see FIG. 4) selects the second status information Is2 that is the target of evaluation by the second water quality measuring instrument 80.

[0153] The status selection step S92 may include a step in which the position information acquisition unit 58 (see FIG. 1) acquires position information Ip of the target ship 200. The status selection step S92 may include a step in which the position information acquisition unit 58 acquires the distance between the nautical position of the target ship 200 and the land closest to the nautical position. The status selection step S92 may be a step in which the evaluation unit 14 (see FIG. 4) selects second status information Is2 to be evaluated by the second water quality measuring instrument 80 based on the distance.

[0154] The data processing step S94 is a step in which the evaluation unit 14 (see FIG. 4) processes the water quality measurement data of the second liquid 74 (see FIG. 1) or the second effluent 76 (see FIG. 1) measured by the second water quality measuring instrument 80 (see FIG. 1) in the state of the target ship 200 selected in the state selection step S92. The data processing may include an averaging process for the water quality measurement data of the second liquid 74 or the second effluent 76.

[0155] The generation step S102 is a step in which the generation unit 12 (see Figure 4) generates a water quality standard value Qs for when the target ship 200 is in the state indicated in the second status information Is2 based on the second status information Is2 and the first status information Is1 and the first water quality measurement value Q1 stored in the storage step S100.

[0156] The evaluation step S104 is a step in which the evaluation unit 14 evaluates the second water quality measuring device 80 based on the second status information Is2, the first status information Is1 and the first water quality measurement value Q1, and the second water quality measurement value Q2 of the second water quality measuring device 80 (see FIG. 1). The evaluation step S104 may also be a step in which the evaluation unit 14 evaluates the second water quality measuring device 80 based on the second water quality measurement value Q2 of the second water quality measuring device 80 (see FIG. 1) and the water quality standard value Qs generated in the generation step 102.

[0157] The evaluation step S104 may be a step in which the evaluation unit 14 evaluates the second water quality measuring instrument 80 based on the first turbidity Tu1 and the second turbidity Tu2. The evaluation step S104 may be a step in which the evaluation unit 14 evaluates the second water quality measuring instrument 80 based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first transmitted light Lt1, and the intensity of the third transmitted light Lt3.

[0158] The evaluating step S104 may include a trend determining step S120, a first determining step S124, a second determining step S128, and a third determining step S 132. The evaluating step S104 may include a transmitting step S130.

[0159] The trend determination step S120 is a step in which the evaluation unit 14 determines whether the change over time of the second water quality measurement value Q2 from the second water quality measuring device 80 shows the same trend as the change over time of the first water quality measurement value Q1 from the first water quality measuring device 180. The trend determination step S120 will be described in detail later.

[0160] In the first determination step S124, the evaluation unit 14 determines whether the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh. If it is determined that the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, the sensor evaluation method proceeds to a second determination step S128. If it is not determined that the transmitted light intensity ratio RL is smaller than the transmitted light intensity threshold RLh, the sensor evaluation method proceeds to a third determination step S132.

[0161] In the second determination step S128, when the target ship 200 navigates through a first sea area A1 where the regulation value of the concentration of particulate matter is a first concentration and a second sea area A2 where the regulation value is a second concentration, the evaluation unit 14 determines whether the transmitted light intensity ratio RL in the first sea area A1 is smaller than the transmitted light intensity threshold RLh and whether the transmitted light intensity ratio RL in the second sea area A2 is smaller than the transmitted light intensity threshold RLh. If the determination in the second determination step S128 is Yes, the evaluation unit 14 may evaluate that the second water quality measuring device 80 is contaminated. If the determination in the second determination step S128 is Yes, the sensor evaluation method proceeds to a transmission step S130. If the determination in the second determination step S128 is No, the evaluation unit 14 may evaluate that the second liquid 74 or the second drainage liquid 76 is contaminated.

[0162] The transmission step S130 is a step in which the first transmission unit 20 (see FIG. 4) of the sensor evaluation device 100 transmits information instructing cleaning of the second water quality measuring device 80 (in this example, the second turbidity system 81) to the second receiving unit 56 (see FIG. 1) of the target ship 200. If the determination in the second determination step S128 is No, the sensor evaluation method returns to the second status information acquisition step S90.

[0163] The evaluation step S104 may include a step in which the evaluation unit 14 evaluates the second water quality measuring instrument 80 based on the first turbidity Tu1, the second turbidity Tu2, the intensity of the first fluorescence Lf1, and the intensity of the second fluorescence Lf2. The third determination step S132 is a step in which the evaluation unit 14 determines whether the turbidity ratio RT is equal to or less than the turbidity threshold RTh and the fluorescence intensity ratio RS is smaller than the fluorescence intensity threshold RSh. If the determination in the third determination step S132 is No, the evaluation unit 14 may evaluate that the second liquid 74 or the second drainage liquid 76 is contaminated. If the determination in the third determination step S132 is No, the sensor evaluation method proceeds to a fourth determination step S133.

[0164] 26 is a flow chart showing an example of a sensor evaluation method according to an embodiment of the present invention. The evaluation step S104 may include a fourth determination step S133, a fifth determination step S135, and a sixth determination step S138. The evaluation step S104 may include a transmission step S134 and a transmission step S136. The evaluation step S104 may include a calculation step S140, a determination step S144, and a notification step S148.

[0165] The fourth determination step S133 is a step in which the evaluation unit 14 determines whether the turbidity ratio RT is equal to or less than the turbidity threshold value RTh and the fluorescence intensity ratio RS is equal to or more than the fluorescence intensity threshold value RSh. If the determination in the fourth determination step S133 is Yes, the evaluation unit 14 may evaluate that the second turbidity meter 81 is contaminated. The transmission step S134 is a step in which the first transmission unit 20 (see FIG. 4) of the sensor evaluation device 100 transmits information to the second reception unit 56 (see FIG. 1) of the target ship 200 instructing cleaning of the second water quality measuring instrument 80 (the second turbidity meter 81 in this example). If the determination in the fourth determination step S133 is No, the sensor evaluation method proceeds to a fifth determination step S135.

[0166] The fifth determination step S135 is a step in which the evaluation unit 14 determines whether the turbidity ratio RT is greater than the turbidity threshold value RTh and the fluorescence intensity ratio RS is less than the fluorescence intensity threshold value RSh. If the determination in the fifth determination step S135 is Yes, the evaluation unit 14 may evaluate that the second fluorometer 83 is contaminated. The transmission step S136 is a step in which the first transmission unit 20 (see FIG. 4) of the sensor evaluation device 100 transmits information to the second reception unit 56 (see FIG. 1) of the target ship 200 instructing cleaning of the second water quality measuring instrument 80 (the second fluorometer 83 in this example). If the determination in the fifth determination step S135 is No, the sensor evaluation method proceeds to a sixth determination step S138.

[0167] The sixth determination step S138 is a step in which the evaluation unit 14 evaluates the second fluorometer 83 based on the intensity of the third transmitted light Lt3 and the intensity of the fourth transmitted light Lt4. The sixth determination step S138 may be a step in which the evaluation unit 14 determines whether the transmitted light intensity ratio RL' is smaller than a transmitted light intensity threshold RLh'. If the determination in the sixth determination step S138 is Yes, the evaluation unit 14 may evaluate the second fluorometer 83 as having deteriorated, or may evaluate the fourth light source 35 as having deteriorated. If the determination in the sixth determination step S138 is Yes, the sensor evaluation method proceeds to a calculation step S140.

[0168] The calculation step S140 is a step in which the calculation unit 18 calculates the calibration time tc (see FIG. 16) or the replacement time tf (see FIG. 16) of the second fluorometer 83 based on the evaluation result Rs of the second fluorometer 83 in the sixth determination step S138. The calculation step S140 may include a step in which the evaluation unit 14 (see FIG. 4) adds water quality measurement data of the second liquid 74 or the second effluent 76 measured by the second water quality measuring instrument 80 to the water quality measurement data of the first liquid 174 or the first effluent 176 averaged in the data processing step S204 (see FIG. 16), and a step in which the water quality measurement data after the addition is averaged again.

[0169] Calculation step S140 may be a step in which calculation unit 18 calculates the calibration time tc (see FIG. 16) or replacement time tf (see FIG. 16) of second fluorescent meter 83 based on the water quality measurement data that has been averaged again. Calculation step S140 may include a step in which calculation unit 18 calculates the number of days remaining until the replacement time tf based on evaluation result Rs. After calculation step S140, the sensor evaluation method proceeds to decision step S144.

[0170] The determination step S144 may be a step in which the evaluation unit 14 determines whether the second fluorometer 83 should be calibrated or replaced based on the calibration time tc or replacement time tf calculated in the calculation step S140. If it is determined in the determination step S144 that the second fluorometer 83 should be calibrated or replaced, the sensor evaluation method proceeds to a notification step S148. If it is not determined in the determination step S144 that the second fluorometer 83 should be calibrated or replaced, the sensor evaluation method ends the evaluation of the second water quality measuring instrument 80.

[0171] Notification step S148 is a step in which the control unit 16 (see FIG. 4) issues a warning to the effect that the second fluorometer 83 should be calibrated or replaced. The warning may be notified to the crew of the target ship 200. The warning to the effect that the second fluorometer 83 should be replaced may include a notification to the effect that a new second fluorometer 83 or fourth light source 35 should be prepared. After notification step S148, the sensor evaluation method ends the evaluation of the second water quality measuring instrument 80.

[0172] Fig. 27 is a diagram for explaining an example of the details of trend determination in the trend determination step S120. As described above, the trend determination step S120 is a step in which the evaluation unit 14 determines whether the time change of the second water quality measurement value Q2 of the second water quality measuring device 80 shows the same trend as the time change of the first water quality measurement value Q1 of the first water quality measuring device 180. Fig. 27 is an example of the time change of the first water quality measurement value Q1 and the second water quality measurement value Q2. In Fig. 27, the time change of the first water quality measurement value Q1 is indicated by a solid line, and the time change of the second water quality measurement value Q2 is indicated by a dashed line.

[0173] Assume that at time zero, there is no contamination of the first water quality measuring device 180 and the second water quality measuring device 80. Contamination based on water quality Q1 may occur in the first water quality measuring device 180 over time. Contamination based on water quality Q2 may occur in the second water quality measuring device 80 over time. For this reason, the first water quality measurement value Q1 and the second water quality measurement value Q2 may decrease over time.

[0174] An arbitrary time after time zero is set as time tp. A time from before time tp to after time tp is set as time Tp. The time change of the water quality measurement value shows the same tendency may refer to the case where the time change rate of the second water quality measurement value Q2 at time tp is within a predetermined range with respect to the time change rate of the first measurement value Q1 at the time tp. The time change of the water quality measurement value shows the same tendency may refer to the case where the change amount of the second water quality measurement value Q2 per time Tp is within a predetermined range with respect to the change amount of the first water quality measurement value Q1 per time Tp. The predetermined range may be 70% or more, 80% or more, or 90% or more. The tendency determination step S120 may be a step in which the evaluation unit 14 determines whether the time change of the second turbidity Tu2 shows the same tendency as the time change of the first turbidity Tu1 and the time change of the intensity of the second fluorescence Lf2 shows the same tendency as the time change of the intensity of the first fluorescence Lf1.

[0175] FIG. 28 is a diagram illustrating another example of the details of trend determination in trend determination step S120. Each circle in FIG. 28 indicates the relationship between the first water quality measurement value Q1 and the second water quality measurement value Q2 at the same time in FIG. 27. When the time change of the first water quality measurement value Q1 and the time change of the second water quality measurement value Q2 are the same, all the circles are plotted on the straight line of Q1=Q2. In FIG. 28, the straight line of Q1=Q2 is shown as a solid line. In FIG. 28, the relationship between the first water quality measurement value Q1 and the second water quality measurement value Q2 at multiple times is plotted.

[0176] The relationship between the first water quality measurement value Q1 and the second water quality measurement value Q2 at multiple times can be expressed by an approximation line. In Fig. 28, the approximation line is shown by a dashed line. In this example, the relationship between the first water quality measurement value Q1 and the second water quality measurement value Q2 is approximated by a linear function. The slope of the approximation line is α, and the intercept is β.

[0177] The trend determination step S120 may be a step in which the evaluation unit 14 determines whether the time change of the second water quality measurement value Q2 shows the same trend as the time change of the first water quality measurement value Q1 based on the approximation line in FIG. 28. The evaluation unit 14 may determine the trend based on at least one of the slope α and the intercept β. The evaluation unit 14 may determine the trend based on the difference between the slope 1 (when Q1=Q2) and the slope α. The evaluation unit 14 may determine the trend based on the difference between the intercept zero (when Q1=Q2) and the intercept β. The evaluation unit 14 may determine that the time change of the second water quality measurement value Q2 shows the same trend as the time change of the first water quality measurement value Q1 when the difference between the intercept zero and the intercept β is less than a predetermined magnitude. The evaluation unit 14 may determine that the time change of the second water quality measurement value Q2 shows the same trend as the time change of the first water quality measurement value Q1 when the difference between the intercept zero and the intercept β is less than a predetermined magnitude. The evaluation unit 14 may determine that the change over time of the second water quality measurement value Q2 shows the same trend as the change over time of the first water quality measurement value Q1 if the difference between the slope 1 and the slope α is less than a predetermined magnitude and the difference between the intercept zero and the intercept β is less than a predetermined magnitude.

[0178] FIG. 29 is a diagram showing an example of a computer 2200 in which the sensor evaluation device 100 or the sensor evaluation system 400 according to an embodiment of the present invention may be entirely or partially embodied. A program installed in the computer 2200 can cause the computer 2200 to perform operations associated with the sensor evaluation device 100 or the sensor evaluation system 400 according to an embodiment of the present invention, or to function as one or more sections of the sensor evaluation device 100 or the sensor evaluation system 400, or to execute the operations or one or more sections, or to execute each step (see FIGS. 24 to 26) of the sensor evaluation method of the present invention. The program can be executed by the CPU 2212 to cause the computer 2200 to execute specific operations associated with some or all of the blocks in the flowcharts (FIGS. 24 to 26) and block diagrams (FIGS. 1 to 4, 6, 9, 20, 21, and 23) described in this specification.

[0179] A computer 2200 according to an embodiment of the present invention includes a CPU 2212, a RAM 2214, a graphic controller 2216, and a display device 2218. The CPU 2212, the RAM 2214, the graphic controller 2216, and the display device 2218 are connected to each other by a host controller 2210. The computer 2200 further includes input / output units such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive. The communication interface 2222, the hard disk drive 2224, the DVD-ROM drive 2226, and the IC card drive are connected to the host controller 2210 via an input / output controller 2220. The computer further includes legacy input / output units such as a ROM 2230 and a keyboard 2242. The ROM 2230, the keyboard 2242, and the like are connected to the input / output controller 2220 via an input / output chip 2240.

[0180] The CPU 2212 controls each unit by operating according to programs stored in the ROM 2230 and the RAM 2214. The graphic controller 2216 acquires image data generated by the CPU 2212 into a frame buffer or the like provided in the RAM 2214 or into the RAM 2214, thereby causing the image data to be displayed on the display device 2218.

[0181] The communication interface 2222 communicates with other electronic devices via a network. The hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200. The DVD-ROM drive 2226 reads programs or data from the DVD-ROM 2201 and provides the read programs or data to the hard disk drive 2224 via the RAM 2214. The IC card drive reads programs and data from an IC card or writes programs and data to an IC card.

[0182] The ROM 2230 stores a boot program or the like that is executed by the computer 2200 upon activation, or a program that depends on the hardware of the computer 2200. The input / output chip 2240 may connect various input / output units to the input / output controller 2220 via a parallel port, a serial port, a keyboard port, a mouse port, or the like.

[0183] The programs are provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card. The programs are read from the computer-readable medium, installed in the hard disk drive 2224, the RAM 2214, or the ROM 2230, which are also examples of computer-readable media, and executed by the CPU 2212. Information processing described in these programs is read by the computer 2200, and brings about cooperation between the programs and the various types of hardware resources described above. An apparatus or method may be constructed by implementing information manipulation or processing according to the use of the computer 2200.

[0184] For example, when communication is performed between the computer 2200 and an external device, the CPU 2212 may execute a communication program loaded in the RAM 2214 and instruct the communication interface 2222 to perform communication processing based on the processing described in the communication program. Under the control of the CPU 2212, the communication interface 2222 reads transmission data stored in a transmission buffer processing area provided in the RAM 2214, the hard disk drive 2224, the DVD-ROM 2201, or a recording medium such as an IC card, and transmits the read transmission data to a network, or writes reception data received from the network to a reception buffer processing area or the like provided on the recording medium.

[0185] The CPU 2212 may cause all or a necessary portion of a file or database stored in an external recording medium such as the hard disk drive 2224, the DVD-ROM drive 2226 (DVD-ROM 2201), an IC card, etc. to be read into the RAM 2214. The CPU 2212 may perform various types of processing on the data on the RAM 2214. The CPU 2212 may then write back the processed data to the external recording medium.

[0186] Various types of information, such as various types of programs, data, tables, and databases, may be stored in the recording medium and processed. The CPU 2212 may execute various types of processing on the data read from the RAM 2214, including various types of operations, information processing, conditional decisions, conditional branches, unconditional branches, information searches or replacements, etc., specified by the instruction sequences of the programs described in this disclosure. The CPU 2212 may write back the results to the RAM 2214.

[0187] CPU2212 may search for information in a file, database, etc. in the recording medium. For example, when a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, CPU2212 may search for an entry that matches a condition in which the attribute value of the first attribute is specified from among the plurality of entries, read the attribute value of the second attribute stored in the entry, and obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition by reading the second attribute value.

[0188] The above-mentioned program or software module may be stored on the computer 2200 or in a computer-readable medium of the computer 2200. A recording medium such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet can be used as the computer-readable medium. The program may be provided to the computer 2200 by the recording medium.

[0189] Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the description of the claims that such modifications and improvements can also be included in the technical scope of the present invention.

[0190] It should be noted that the order of execution of each process, such as operations, procedures, steps, and stages, in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not specifically stated as "before," "prior to," etc., and may be realized in any order unless the output of a previous process is used in a later process. Even if the operational flow in the claims, specifications, and drawings is explained using "first," "next," etc. for convenience, it does not mean that it is essential to perform the process in this order. [Explanation of symbols]

[0191] DESCRIPTION OF SYMBOLS 10....Memory unit, 11....Calibration unit, 12....Generation unit, 14....Evaluation unit, 16....Control unit, 18....Calculation unit, 19....Evaluation learning unit, 20....First transmission unit, 22....First reception unit, 30....Third light source, 31....Third transmitted light receiving unit, 32....Second scattered light receiving unit, 33....Flow path, 34....Lens, 35....Fourth light source, 36....Fourth transmitted light receiving unit, 37....Second fluorescent light receiving unit, 38....Flow path, 39....Lens, 50....Control unit, 52....Data collection unit, 54....Second transmission unit, 56....Second reception unit, 58....Position information Acquisition unit, 60...power unit, 62...second exhaust gas, 64...exhaust gas, 70...target exhaust gas treatment device, 72...pump, 74...second liquid, 76...second waste liquid, 80...second water quality measuring device, 81...second turbidity meter, 82...gas sensor, 83...second fluorometer, 84...valve, 85...valve, 86...three-way valve, 87...strainer, 88...chamber, 89...defoaming layer, 90...switching unit, 92...switching unit, 96...pump, 97...pressure meter, 98...pH meter, 99...thermometer, 100...sensor evaluation device, 110... . . evaluation inference model, 130...first light source, 131...first transmitted light receiving unit, 132...first scattered light receiving unit, 133...flow path, 134...lens, 135...second light source, 136...second transmitted light receiving unit, 137...first fluorescent light receiving unit, 138...flow path, 139...lens, 150...control unit, 152...data collecting unit, 154...second transmitting unit, 156...second receiving unit, 158...position information acquiring unit, 160...power unit, 162...first exhaust gas, 164...exhaust gas, 170...reference exhaust gas treatment device, 172...pump, 174···first liquid, 176···first discharge liquid, 180···first water quality measuring device, 181···first turbidity meter, 182···gas sensor, 183···first fluorescence meter, 184···valve, 185···valve, 186···three-way valve, 187···strainer, 188···chamber, 189···defoaming layer, 196···pump, 197···pressure meter, 198···pH meter, 199···thermometer, 200···target vessel, 210···target vessel, 300···reference vessel, 400···sensor evaluation system, 2200···computer, 2201···DVD-ROM,2210··· host controller, 2212··· CPU, 2214··· RAM, 2216··· graphics controller, 2218··· display device, 2220··· input / output controller, 2222··· communication interface, 2224··· hard disk drive, 2226··· DVD-ROM drive, 2230··· ROM, 2240··· input / output chip, 2242··· keyboard,

Claims

1. an evaluation unit that evaluates the second water quality measuring device based on second status information indicating the status of the target ship, the first status information, the first water quality measurement value, and a second water quality measurement value of an optical second water quality measuring device possessed by the target ship; the first status information being information indicative of a status of one or more reference vessels; The first water quality measurement value is a water quality measurement value of a first optical water quality measuring device possessed by the reference ship, and is a water quality measurement value when the reference ship is in a state indicated by the first status information. Sensor evaluation device.

2. the reference ship has a reference exhaust gas treatment device into which a first liquid and a first exhaust gas are introduced and which discharges a first effluent obtained by treating the first exhaust gas with the first liquid; The target ship has a target exhaust gas treatment device into which a second liquid and a second exhaust gas are introduced and which discharges a second effluent obtained by treating the second exhaust gas with the second liquid, the first water quality measuring device has a first turbidity meter that measures a first turbidity of the first liquid or the first wastewater, the second water quality measuring device has a second turbidity meter that measures a second turbidity of the second liquid or the second wastewater, The evaluation unit evaluates the second water quality measuring device based on the first turbidity and the second turbidity. The sensor evaluation device according to claim 1 .

3. the first water quality measuring device has a first transmitted light receiving unit that receives first transmitted light obtained by light emitted by a first light source passing through the first liquid or the first wastewater, the second water quality measuring device has a third transmitted light receiving unit that receives third transmitted light obtained by light emitted by a third light source passing through the second liquid or the second wastewater, the evaluation unit evaluates the second water quality measuring device based on the first turbidity, the second turbidity, the intensity of the first transmitted light, and the intensity of the third transmitted light. The sensor evaluation device according to claim 2 .

4. The sensor evaluation device of claim 3, wherein the evaluation unit evaluates that the second water quality measuring device is contaminated, or that the second liquid or the second wastewater is contaminated, when a transmitted light intensity ratio of the intensity of the third transmitted light to the intensity of the first transmitted light is smaller than a predetermined transmitted light intensity threshold.

5. the target ship navigates a first sea area in which a regulatory value for a concentration of particulate matter contained in the second exhaust gas is a first concentration and a second sea area in which a regulatory value for the concentration is a second concentration different from the first concentration; When the transmitted light intensity ratio is smaller than the transmitted light intensity threshold while the target ship is navigating the first sea area, and when the transmitted light intensity ratio is smaller than the transmitted light intensity threshold while the target ship is navigating the second sea area, the evaluation unit evaluates that the second water quality measuring device is contaminated. The sensor evaluation device according to claim 4 .

6. the target ship navigates a first sea area in which a regulatory value for a concentration of particulate matter contained in the second exhaust gas is a first concentration and a second sea area in which a regulatory value for the concentration is a second concentration different from the first concentration; When the target ship is navigating the first sea area, the transmitted light intensity ratio is smaller than the transmitted light intensity threshold, and when the target ship is navigating the second sea area, the transmitted light intensity ratio is equal to or greater than the transmitted light intensity threshold, or When the transmitted light intensity ratio is smaller than the transmitted light intensity threshold while the target ship is navigating the second sea area, and when the transmitted light intensity ratio is equal to or greater than the transmitted light intensity threshold while the target ship is navigating the first sea area, the evaluation unit evaluates that the second liquid or the second discharged liquid is contaminated. The sensor evaluation device according to claim 4 .

7. the first water quality measuring instrument further includes a first fluorometer that measures a first fluorescence when the first liquid or the first wastewater is irradiated with light emitted by a second light source; the second water quality measuring instrument further includes a second fluorometer that measures a second fluorescence when the second liquid or the second wastewater is irradiated with light emitted by a fourth light source; the evaluation unit evaluates the second water quality measuring instrument based on the first turbidity, the second turbidity, the intensity of the first fluorescent light, and the intensity of the second fluorescent light. The sensor evaluation device according to claim 2 .

8. 8. The sensor evaluation device according to claim 7, wherein the evaluation unit evaluates that the second liquid or the second drainage liquid is contaminated when a turbidity ratio of the second turbidity to the first turbidity is equal to or less than a predetermined turbidity threshold and a fluorescence intensity ratio of an intensity of the second fluorescence to an intensity of the first fluorescence is smaller than a predetermined fluorescence intensity threshold.

9. 8. The sensor evaluation device according to claim 7, wherein the evaluation unit evaluates the second turbidity meter as being contaminated when a turbidity ratio of the second turbidity to the first turbidity is equal to or less than a predetermined turbidity threshold and a fluorescence intensity ratio of an intensity of the second fluorescence to an intensity of the first fluorescence is equal to or greater than a predetermined fluorescence intensity threshold.

10. 8. The sensor evaluation device according to claim 7, wherein the evaluation unit evaluates the second fluorometer as being contaminated when a turbidity ratio of the second turbidity to the first turbidity is greater than a predetermined turbidity threshold and a fluorescence intensity ratio of an intensity of the second fluorescence to an intensity of the first fluorescence is smaller than a predetermined fluorescence intensity threshold.

11. the second water quality measuring device has a third transmitted light receiving unit that receives third transmitted light obtained by light emitted by a third light source passing through the second liquid or the second wastewater, the second fluorometer further includes a fourth transmitted light receiving unit that receives fourth transmitted light obtained by light emitted by the fourth light source passing through the second liquid or the second drainage liquid, The sensor evaluation device according to claim 7 , wherein the evaluation unit evaluates the second fluorometer based on an intensity of the third transmitted light and an intensity of the fourth transmitted light.

12. The sensor evaluation device according to claim 11 , further comprising a calculation unit that calculates a calibration timing or replacement timing of the second fluorometer based on a result of evaluation of the second fluorometer by the evaluation unit.

13. The sensor evaluation device according to claim 12 , wherein the calculation unit calculates the calibration time or the replacement time based on a time change of the second fluorescence.

14. The sensor evaluation device according to claim 12 , wherein the calculation unit calculates the calibration time or the replacement time further based on a planned route of the target ship.

15. The first status information includes information about the nautical position of the reference vessel; The second status information includes information on the voyage position of the target ship, the evaluation unit evaluates the second water quality measuring instrument based on the nautical position of the target ship, the nautical position of the reference ship, and the first water quality measurement value when the reference ship is at the nautical position; The sensor evaluation device according to claim 3 .

16. The second status information includes information on the voyage position of the target ship, The evaluation unit selects a state of the target ship for evaluating the second water quality measuring device based on information on the navigation position of the target ship, and evaluates the second water quality measuring device when the target ship is in the selected state. The sensor evaluation device according to any one of claims 12 to 14.

17. The sensor evaluation device according to claim 16 , wherein the calculation unit determines a position for replacing the second fluorometer based on the calculated replacement time and information on the voyage position of the target ship.

18. The sensor evaluation device according to claim 11 , further comprising a calibration unit that calibrates the second fluorometer based on a result of evaluation of the second fluorometer by the evaluation unit.

19. The sensor evaluation device according to claim 1 , further comprising a storage unit that stores the first status information and the first water quality measurement value.

20. One of the second water quality measuring devices measures the water quality of the second liquid, and the other of the second water quality measuring devices measures the water quality of the second wastewater, The evaluation unit evaluates the other second water quality measuring devices based on the evaluation result of one of the second water quality measuring devices. The sensor evaluation device according to claim 2 .

21. A sensor evaluation device as described in any one of claims 1 to 14, further comprising an evaluation learning unit that generates an evaluation inference model that outputs evaluation inference data indicating an evaluation result for the second water quality measurement value when the second water quality measurement value of the second water quality measuring device is input, by machine learning the relationship between the first water quality measurement value and the evaluation result of the second water quality measuring device.

22. The sensor evaluation device according to any one of claims 11 to 14, A second transmission unit included in the target ship, the second transmission unit transmitting a second water quality measurement value of the second water quality measuring device to the sensor evaluation device; Equipped with The sensor evaluation device has a first transmission unit that transmits the evaluation result of the second water quality measuring device by the evaluation unit to the target ship. Sensor evaluation system.

23. The sensor evaluation device according to claim 16 ; a position information acquisition unit included in the target ship, the position information acquisition unit acquiring information on the voyage position of the target ship; a second transmission unit included in the target ship, the second transmission unit transmitting a second water quality measurement value of the second water quality measuring device and information on the nautical position of the target ship to the sensor evaluation device; Equipped with The sensor evaluation device has a first transmission unit that transmits the evaluation result of the second water quality measuring device by the evaluation unit to the target ship. Sensor evaluation system.

24. The sensor evaluation system of claim 22 , further comprising a calibration unit included in the target ship, the calibration unit calibrating the second fluorometer based on an evaluation result of the second fluorometer by the evaluation unit.

25. The sensor evaluation system of claim 22 , further comprising a memory unit included in the target ship, the memory unit storing the first status information and the first water quality measurement value.

26. The evaluation unit includes an evaluation step of evaluating the second water quality measuring device based on second status information indicating the status of the target ship, the first status information and the first water quality measurement value, and a second water quality measurement value of an optical second water quality measuring device possessed by the target ship, the first status information being information indicative of a status of one or more reference vessels; The first water quality measurement value is a water quality measurement value of a first optical water quality measuring device possessed by the reference ship, and is a water quality measurement value when the reference ship is in a state indicated by the first status information. Sensor evaluation methods.

27. A sensor evaluation program for causing a computer to function as the sensor evaluation device according to any one of claims 1 to 14.

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